CN102995193B - The spinning end breaking checkout gear of a kind of spinning end breaking detection method and application the method - Google Patents

Abstract

The invention discloses a spun yarn breakage detection method for a ring spinning machine and a spun yarn breakage detection device using the method. The spun yarn breakage detection method is characterized in that the microcontroller is used to collect the sound signal outside the steel ring during spinning through the sound sensor, if the detected sound signal has a relative If the ring is farther away from the sound sensor, and the frequency of the peak is slightly lower than the frequency of the spindle rotation, then the yarn at this spindle position is not broken, otherwise, the yarn at this spindle position is broken; In the vertical height direction, it is preferably located at the level with the steel ring or slightly higher than the steel ring. In the horizontal direction, the minimum distance between the sound sensor and the vertical axis of the steel ring is greater than the maximum outer diameter of the traveler and the yarn balloon movement track. The spun yarn breakage detection device of the present invention is designed according to the spun yarn breakage detection method of the present invention.

Description

A spun yarn breakage detection method and a spun yarn breakage detection device using the method

technical field

The invention relates to the field of spun yarn breakage detection in the spun yarn spinning process, in particular to a spun yarn breakage detection method and a spun yarn breakage detection device using the method, and the method and the device are used in ring spinning frames. The spun yarn breakage detection method can detect the spun yarn breakage that occurs during the spinning process of the ring spinning frame; the spun yarn breakage detection device using this method is installed on the ring spinning frame and runs along the length of the ring plate of the spinning frame Direction movement, during the movement, it detects the broken end of the spun yarn during the spinning process and presents the specific spindle position information of the broken end to the spun yarn operator.

Background technique

Among the various spinning processes, the spinning process requires the most labor. The main responsibility of the spinning machine operator is to check and deal with broken ends, and the inspection of broken ends takes up a lot of working time, especially when spinning dark yarns. The color is close to the environment, which increases the difficulty of decapitation inspection. In order to reduce the labor intensity of the spun yarn operator and reduce the amount of labor, it is necessary to automatically detect the broken end of the spun yarn and notify the operator of the detection result for processing.

The utility model patent "yarn breakage detection device" (application number 02265359.7) installs the thermal sensor on the yarn guide hook or steel ring, and detects the friction between the yarn and the yarn guide hook and the steel ring and traveler through the thermal sensor The frictional heat is generated to detect whether the breakage occurs. This method requires the installation of sensors for each spindle, which requires a large investment. The utility model patent "Yarn Breakage Detection Device" (application number 200520080973.7) discloses a yarn breakage detection device. Photoelectric sensors are installed at both ends of the roller seat, and the rays emitted by the photoelectric sensors pass through the lower edge of the front top roller. When the yarn breaks, the photoelectric sensor is used to detect the phenomenon of flying flowers and winding cot rollers, and the signal feedback device connected to the photoelectric sensor is used to issue a broken end indication. This method is susceptible to the influence of flying flowers in the environment, and there is a possibility of missing detection. , and it is impossible to determine the specific spindle position where the end break occurs. The utility model patent "Spinning Yarn Guide with Yarn Breakage Detection Device" (Application No. 200520045862.2) uses a specially designed yarn guide hook to detect yarn breakage, and a photoelectric sensor is installed on each yarn guide hook. The signal is sent to the controller. This method also needs to install a detection element for each spindle position, and the cost is relatively high. The utility model patent "A device for automatic detection of yarn breakage and automatic jointing" (application number 201220009611.9) adds a guide rail and a moving trolley beside the steel ring plate. The moving trolley reciprocates on the guide rail, and uses an inductance probe to detect the steel wire during the reciprocating movement. The moving speed of the ring can be used to detect the breakage of the spun yarn. Using the inductance probe to detect the moving speed of the traveler has high requirements on the accuracy of the sensor and the accuracy of the installation position, especially when the traveler is small, which increases the uncertainty of detection. Invention patent "Detection method for yarn twisting end breakage on spinning frame" (application number 201210009964.3) utilizes a photoelectric sensor or pressure sensor installed on the ring plate to detect the signal generated by the movement of the traveler to detect end breakage. The sensor is installed on the spindle position, and the cost is relatively high. Invention patent application "A method for detecting broken ends" (Application No. 200910221019.8) Install a friction body on the surface of the pickup, make the moving sliver or yarn pass on the surface of the friction body and rub against the friction body, and detect the sliver or warp yarn through the pickup The presence or absence of friction sound generated on the surface of the friction body during the movement is used to detect broken ends. Because the field noise is large, but the friction sound is very small, and the frequency characteristics of the friction sound will change with the yarn tension and the friction coefficient between the fiber and the friction body, which increases the uncertainty of signal filtering, making it difficult to Extract effective friction signals from noise by filtering; in addition, this method needs to add friction bodies and pickups in the path of sliver or yarn movement. If it is used in spinning frame, it needs to add a set of friction bodies for each spindle position And the pickup and supporting circuit system, the cost will be very high, and there is a problem that it is not easy to install, and the specific implementation of the friction body is not described in its manual, so it is difficult to imagine that the invention can be used for ring spinning machine broken ends detection. The utility model patent "Yarn Breakage Detection Mechanism for Counter-injection Pneumatic Spinning Frame" (Application No. 201220014294.X) and the utility model patent "Yarn Breakage Detection Mechanism for Reflective Pneumatic Spinning Frame" (Application No. 201220014311.X) are in each An air pipe nozzle and a pressure sensor are installed near each steel ring, and the pressure sensor is used to detect the air pressure change caused by the rotation of the traveler, thereby detecting the broken end of the spun yarn. The utility model patent "Yarn Breakage Detection Mechanism for Photoelectric Reflective Spinning Frame" (application number 201220014375.X) and the utility model patent "Yarn Breakage Detection Mechanism for Optoelectronic Spinning Frame" (application number 201220014683.2) are in each steel A pair of light sources and photoelectric sensors are installed near the collar to detect the movement of the traveler, thereby detecting broken ends of the spun yarn. These patents also have the problems of high implementation cost, large quantity, and difficult maintenance.

Contents of the invention

To address the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a new method for detecting broken ends of spun yarns for ring spinning frames and a device for detecting broken ends of spun spun yarns using the method. The broken end detection method of the spun yarn detects the broken end of the spun yarn by means of sound detection and analysis, and has the characteristics of non-contact measurement and high detection accuracy; , has the characteristics of simple structure, reliable operation, convenient maintenance, and low requirements on the accuracy of sensor installation position.

The solution of the present invention to solve the technical problem of the spun yarn breakage detection method is to design a spun yarn breakage detection method for the ring spinning frame, which is characterized in that the sound sensor is used to collect the outer side of the ring during spinning by using a microcontroller. The sound signal is low-pass filtered on the sound signal collected, and according to the characteristics of the sound generated by the frictional movement of the traveler and the steel ring in the sound signal after filtering, it is judged whether the broken end of the spun yarn has occurred; The characteristics of the sound produced by the frictional movement of the traveler and the steel ring in the signal Judging whether the yarn breakage occurs means that if the filtered sound signal has a distance from the traveler relative to the sound sensor at each moment corresponding to the traveler approaching the sound sensor If the wave peak is higher at a far time, and the frequency of this wave peak is slightly lower than the frequency of the spindle rotation, then the spun yarn at this spindle position is not broken, otherwise, the spun yarn at this spindle position is broken. The microcontroller is preferably a single-chip microcomputer or an embedded controller; when the sound sensor collects the sound signal of a certain spindle position, its sound transmission hole is located at the outer side of the steel ring corresponding to the spindle position, and is preferably located at the outer side of the steel ring corresponding to the spindle position in the vertical height direction. The collar is horizontal or slightly higher than the steel collar. In the horizontal direction, it is preferably located in the straight line through the axis of the ring and perpendicular to the length direction of the ring plate. In the horizontal direction, the minimum distance between the sound sensor and the vertical axis of the ring is greater than The maximum outer diameter of the movement track of the traveler and the yarn balloon, subject to not affecting the normal spinning, is preferably greater than 5-50mm; the sound sensor can be a sensor of any principle such as capacitive or moving coil, preferably It is a capacitive sound sensor, the sound sensor is preferably a sensor with a hardware low-pass filter circuit, the sound sensor can be a directional or omnidirectional sound sensor, preferably a directional sound sensor, to improve the ability to detect sound signals in a specific direction , to reduce the influence of the sound of the adjacent spindle position on the detection of the sound signal of the measured spindle position.

The solution of the present invention to solve the technical problem of the spun yarn breakage detection device is to design a spun yarn breakage detection device, which is characterized in that the spun yarn breakage detection device is designed according to the spun yarn breakage detection method of the present invention, which mainly includes Guide rail 7, drive mechanism 11, guide mechanism 2, casing 3, sound sensor 9, power supply device 10, power supply board 14, main circuit board 12, wireless communication module 36, human-computer interaction interface 13; The casing 3 is a shape of A cuboid shell, preferably a metal shell; the guide rail 7 is installed on the side of the ring plate 4 in a horizontal direction by using the bolt 8 and the bracket 1; the drive mechanism 11 mainly includes an actuator 111 and a drive wheel 116, Described driving wheel 116 is installed on one end of driving wheel shaft 115 and is positioned at the outside of casing 3 bottom surfaces, and driving wheel 116 outer circle is meshed with guide rail 7 side, and driving wheel shaft 115 passes the bearing in the bearing block 114 that is installed on casing 3 bottom surfaces Inner hole, the other end of the driving wheel shaft 115 is located in the inner cavity of the casing 3 and connected with the coupling 113. The actuator 111 is a DC motor or a stepping motor with a reducer, and the actuator 111 is installed in the inner cavity formed by the casing 3. cavity, and is fixed on the inner wall of the housing 3 by the actuator bracket 112, and its power output shaft is vertically downward and connected with the coupling 113 at the shaft end of the drive wheel shaft 115; the guide mechanism 2 mainly includes guide wheels 22, guide Wheel mounting plate 24 and guide wheel compression spring 26, described guide wheel 22 is two rollers, and guide wheel 22 is installed on the guide wheel axle 23 that is vertically installed on guide wheel mounting plate 24, and the outer circumferential surface of guide wheel 22 and guide rail The sides of 7 are engaged, and the guide wheel mounting plate 24 utilizes the hinge 27 parallel to the guide rail 7 to be installed on the outer side of the bottom surface of the shell 3 and is parallel to the bottom surface of the shell 3, and can rotate around the hinge 27. The guide wheel compression spring 26 is sleeved on the spring On the guide bar 25, one end of the guide wheel hold-down spring 26 is in contact with the outer side of the bottom surface of the housing 3, and the other side is in contact with the top surface of the guide wheel mounting plate 24, so that the guide wheel mounting plate 24 applies pressure so that the guide wheel mounting plate 24 pushes the guide wheel 22 is compressed on the guide rail 7; the sound sensor 9 is installed on the outer side of the shell 3 opposite to the ring plate 4, and the sound transmission hole of the sound sensor is aligned with the outer side of the ring in a horizontal or downward direction; the power supply device 10 includes a conductive strip 102 installed on the guide rail and two conductive elastic pressing sheets 101. The conductive strip 102 is connected to the positive DC power supply, and the guide rail 7 is connected to the negative DC power supply. An insulating strip 103 is installed between the conductive strip 102 and the guide rail 7. One end of the conductive elastic pressing piece 101 is installed on the outer side of the bottom surface of the shell 3 by the binding post 105. There is an insulating magnetic seat 104 between the binding post 105 and the bottom surface of the shell 3, and the other end of the conductive elastic pressing piece 101 is in contact with the conductive strip 102 and the guide rail 7 respectively. And press by its own elastic force; the power board 14 mainly includes a battery, a charging circuit and a voltage stabilizing circuit, the power board 14 is installed on the inner side of the bottom surface of the shell 3, and the power supply is connected to the terminal 105 through a wire to provide; the main circuit board 12 Installed on the side inner wall of the housing 3 on the same side as the sound sensor 9 Above, the main circuit board 12 mainly includes an audio signal processing circuit, an audio signal acquisition circuit, a microcontroller and its interface circuit, an actuator drive circuit and a communication module; Keyboard and display screen; described wireless communication module 36 comprises wireless communication circuit board 361 and antenna 362, and wireless communication circuit board 361 is installed on the main circuit board side of shell 3 inner side, communicates module and antenna 362 with main circuit board 12 by wire Connected, the antenna 362 is mounted on the outside of the housing side.

Compared with the prior art, the method for detecting broken ends of the spun yarns used in the ring spinning frame of the present invention belongs to non-contact measurement due to the use of sound signals to detect the broken ends of the spun yarns, and is not affected by flying flowers in the workshop. The sound signal is processed and processed, and digital signal processing technology can be used to avoid the influence of noise in the workshop on the measurement results. It is stable, not susceptible to interference and reliable. The device of the present invention for detecting broken ends of ring spinning frames has the characteristics of simple structure, easy maintenance, low cost and easy implementation due to the use of the broken end detection method of the present invention to detect broken ends of spun yarns. The sensor detection method, the sound sensor has relatively low requirements on the accuracy of the installation position, which is easy to implement.

Description of drawings

Fig. 1 is an example of sound signals detected in the method for detecting broken ends of spun yarn according to the present invention.

Fig. 2 is a signal illustration of the sound signal in Fig. 1 after low-pass filtering according to the present invention.

Fig. 3 is a signal illustration of the transformed signal in Fig. 2 according to the present invention.

Fig. 4 is the energy spectrum of the signal in Fig. 3 of the present invention.

Fig. 5 is a schematic front view of the composition of the spun yarn break detection device of the present invention.

Fig. 6 is a schematic side view of the composition of the spun yarn break detection device of the present invention.

Fig. 7 is a schematic diagram of the position of the driving wheel, the guide wheel and the guide rail of the spinning end detection device of the present invention.

In the figure: 1. Bracket 2. Guide mechanism 22. Guide wheel 23. Guide wheel shaft 24. Guide wheel mounting plate 25. Spring guide rod 26. Guide wheel compression spring 27. Hinge 3. Shell 4. Steel ring plate 51. Induction Switch 52. Ingot position steel plate 53. End ingot position steel plate 6. Steel ring 7. Guide rail 8. Bolt 9. Sound sensor 10. Power supply device 101. Conductive elastic pressure sheet 102. Conductive strip 103. Insulation strip 104. Insulation magnetic seat 105. Terminal 11. Driving mechanism 111. Actuating element 112. Actuating element bracket 113. Coupling 114. Bearing seat 115. Driving wheel shaft 116. Driving wheel 12. Main circuit board 13. Man-machine interface 14. Power board 15 . Temperature and humidity sensor 36. Wireless communication module 361. Wireless communication circuit board 362. Antenna.

detailed description

Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof:

The yarn breakage detection method of the present invention uses a sound sensor to convert the measured sound into an analog audio signal, digitally samples the audio signal to obtain a digital sound signal, and judges whether the spun yarn breakage occurs according to the characteristics of the digital sound signal obtained by sampling.

The principle of the spun yarn breakage detection method of the present invention: the traveler and the steel ring have relative motion during spinning, which will generate friction sound. During normal spinning, if the influence of twist shrinkage is ignored, the speed of the traveler is equal to the speed of the spindle minus the front roller The delivery speed is divided by the circumference of the spun yarn. Therefore, the rotation speed of the traveler on the steel ring is slightly lower than the spindle speed. The difference between them varies with the diameter of the spun yarn. If the spun yarn breaks, Then the traveler and the steel ring stop moving relative to each other or the movement speed is significantly lower than that of normal spinning (the traveler is sometimes pushed by the airflow generated by the high-speed rotating spindle after the spun yarn breaks to move on the steel ring, but the movement speed is much lower. Traveler speed during normal spinning). Although the spinning frame is noisy during spinning, the sound frequency close to the friction sound of the traveler is only the sound produced by the spindle rotation. However, because the spindle is rolling friction, the frequency characteristics and amplitude of the sound are different from those of the traveler friction. The sound of movement; in addition, the sound sensor is placed on the outside of the steel ring at a position equal to or slightly higher than the height of the steel ring, because the distance between the moving traveler and the sound sensor is approximately periodic (the reason for the approximation here is that the steel wire The rotation speed of the traveler changes with the change of the winding radius of the spun yarn during the spinning process, but the amount of change is small), so the friction sound of the traveler and the steel ring received by the sound sensor will be louder and sometimes louder. Small, when the traveler moves to the closest distance to the sound sensor, the sound sensor receives the largest friction sound of the traveler, so use the sound sensor located outside the steel ring and at a position equal to or slightly higher than the steel ring to collect the sound there signal, there will be short-term peaks periodically on the collected sound signal, which corresponds to the process that the traveler first approaches and then moves away from the sound sensor (as shown in Figure 1). According to the collected sound signal This feature can judge whether the spun yarn breakage has occurred. If the frequency of the short-term peaks generated by the movement of the traveler is close to the spindle rotation speed, there is no end breakage, otherwise, the end breakage has occurred.

Several specific examples of the broken end detection method of the present invention are given below, these embodiments are only illustrations to the broken end detection method of the spun yarn of the present invention, and do not constitute limitations to the claims of the present invention, and the unmentioned parts of the present invention are applicable in existing technology.

An embodiment of the spun yarn breakage detection method of the present invention: a dynamic microphone is used as the sound sensor, the output of the microphone is connected to the microphone interface of the sound card of the PC, the PC runs the Windows operating system, and the sound signal of the microphone is collected by using LabView development application software , and process and analyze the collected digital sound signal, if there is a peak in the sound signal due to the traveler approaching the sound sensor, and the frequency of the peak is slightly lower than the spindle rotation frequency, then the spun yarn has broken ends. The microphone is located near the steel ring corresponding to the spindle position when collecting the sound signal of a certain spindle position. The sound transmission hole of the microphone faces the outer edge of the traveler sliding track on the steel ring, and is preferably located at the same position as the steel ring in the vertical direction. The position is flat or slightly higher (preferably 0-60mm higher than the steel ring), in the horizontal direction, it is preferably located in a straight line perpendicular to the steel ring axis and the length direction of the steel ring plate, and in the horizontal direction, the distance between the microphone and the steel ring is vertical The minimum distance between the axis centers is greater than the maximum outer diameter of the traveler and balloon movement track, subject to not affecting normal spinning, preferably greater than 5-40mm.

In this embodiment, the sampling frequency when collecting the sound signal is 10kHz, the sampling time is 1s, the design spindle speed is 6000rpm, the front roller pull-out speed is set as 10m/min, and the influence of twisting is neglected, the difference between the rotational frequency of the spindle and the traveler is calculated as 2.65Hz, the collected sound signal is shown in Figure 1. It can be seen from the figure that there are obvious peaks in the signal caused by the traveler's periodic approach to the sound sensor, and the interval between the peaks is slightly greater than 10ms; The collected data is low-pass filtered to remove high-frequency noise. The lowest passband of the filter is 100Hz, and the lowest stopband is 200Hz. After filtering, the signal shown in Figure 2 is obtained. From this signal, it can be seen more clearly that the traveler is close to the sound sensor. The wave peak that appears when; In order to utilize the computer to automatically identify whether there is the feature of the sound change that this traveler movement produces in the sound signal, the present embodiment transforms the signal in Fig. 2, and the specific method is: set the sound signal after filtering The sequence is s _i (i=0, 1, 2...9999), starting from the i-th (i=0, 1, 2...9949) element, using the i-th to i+50 (here 50 is the spindle design The maximum value of the element between half of the rotation frequency) replaces the i-th value, and the signal obtained after such transformation is shown in Figure 3; the signal shown in Figure 3 is analyzed by Fourier spectrum, and the signal in Figure 3 is obtained The energy spectrum is shown in Figure 4. The frequency corresponding to the maximum value of the energy spectrum in the figure is 96 Hz, and the energy is concentrated at this frequency. The design rotation frequency of the spindle is 100 Hz, and the theoretical rotation frequency of the traveler should be 97.35 Hz. The spindle belt of the spinning frame is loose, causing the actual spindle speed to be lower than the designed spindle speed. Therefore, the frequency with the highest energy spectrum amplitude in Figure 4 corresponds to the traveler rotation frequency, which is slightly lower than the spindle rotation frequency. Therefore, the spun yarn does not break , belonging to normal spinning. When the spun yarn breaks, because the traveler's rotation frequency is greatly reduced and becomes irregular, the phenomenon shown in Figures 1-4 of this embodiment will no longer appear in the collected sound signals.

In this embodiment, after performing Fourier spectrum analysis, the energy spectrum is used to determine whether the head is decapitated, but it does not exclude the use of the amplitude spectrum instead of the energy spectrum to determine the decapitation. The Fourier spectrum analysis of the present invention can adopt software spectrum analysis and hardware spectrum analysis, generally speaking, the cost of hardware spectrum analysis system is higher with respect to software spectrum analysis, and the sound spectrum analysis function involved in the present invention utilizes software Spectrum analysis can be competent, therefore, the present invention preferably adopts software spectrum analysis, but does not exclude hardware spectrum analysis using frequency sweep technology or superheterodyne spectrum analysis technology. Except Fourier spectrum analysis, the present invention can also adopt the method of time-frequency analysis (for example linear time-frequency analysis methods such as Gabor transform, wavelet transform or quadratic type time-frequency analysis such as Cohen class time-frequency distribution) to obtain sound signal in different For the energy distribution at the frequency, the present invention preferably adopts the Fourier spectrum analysis method, but it does not exclude the use of the aforementioned time-frequency analysis method to obtain the distribution of the amplitude spectrum of the sound signal.

An improved embodiment of the detection method for spinning end breakage of the present invention: In order to facilitate the application of the detection method for spinning end breakage of the present invention to the production site of spinning frames, an ARM9 series embedded industrial control board is used instead of a PC, and the industrial control board runs a Linux operating system. Adopt C language to write application program to realize the collection and analysis of sound signal and the judgment of spun yarn breakage, adopt the omnidirectional pick-up with power amplifier and filter to do sound sensor, sound sensor is preferably capacitive type in the present embodiment, because capacitive type is better than dynamic The ring type has higher sensitivity, and the industrial control board uses the analog quantity acquisition card to collect the output signal of the sound sensor. In this embodiment, when processing the collected sound signal, the collected sound signal is also firstly low-pass filtered to obtain a sound signal similar to that in Figure 2. Since the traveler's rotation frequency is slightly lower than the spindle's rotation frequency during normal spinning, Assuming that the design spindle rotation speed in the sound sampling process is n revolutions per minute, the time required for the spindle to rotate a circle is 60/n seconds, and the sampling frequency when the analog acquisition card collects the sound signal is f, then the spindle rotates for 1.5 cycles to collect The number of data points obtained is 90f/n. For the filtered sound signal, it is divided into several segments, and the length of each segment is 90f/n data points. For each segment of data, check the two highest peaks in the segment of data If the time difference is slightly longer than the time required for the spindle to rotate one revolution, the spun yarn is not broken. In addition to the signal processing method described in the embodiment of the present invention, a variety of algorithms can also be proposed to identify the characteristics of the peaks in the sound signal due to the movement of the traveler, and judge whether yarn breakage occurs according to the characteristics , no matter what method is used, as long as the characteristics of the sound signal generated by the motion of the traveler in the present invention are used to judge the broken end, it belongs to the scope of application of the present invention.

Another improved embodiment of the spun yarn breakage detection method of the present invention: In order to further reduce the cost of applying the method, a single-chip microcomputer is used as a controller to develop a control circuit board, in order to reduce the impact of the sound of the adjacent spindle position on the tested spindle position. Harmful effects of ingot position sound signal detection. The sound sensor uses a directional pickup with a power amplifier and filter. The single-chip microcomputer uses its own AD channel to detect the analog output signal of the sound sensor, and performs spectrum analysis on the digitized sound signal. Decapitation analysis.

The spun yarn breakage detection device of the present invention is designed according to the spun yarn breakage detection method of the present invention (see Figure 5-7), which mainly includes a guide rail 7, a drive mechanism 11, a guide mechanism 2, a housing 3, an acoustic sensor 9, a power supply Device 10, power supply board 14, main circuit board 12, wireless communication module 36, man-machine interaction interface 13; Described housing 3 is a cuboid housing, preferably a metal material housing, which can shield field interference; The guide rail 7 is installed on the side of the ring plate 4 in a horizontal direction by using the bolt 8 and the bracket 1; the driving mechanism 11 mainly includes an actuator 111 and a driving wheel 116, and the driving wheel 116 is installed on one end of the driving wheel shaft 115 and is located in the housing 3 outside the bottom surface, the outer circle of the driving wheel 116 meshes with the side of the guide rail 7, the driving wheel shaft 115 passes through the bearing in the bearing seat 114 installed on the bottom surface of the casing 3, and the other end of the driving wheel shaft 115 is located in the inner cavity of the casing 3 and is connected to the The coupling 113 is connected, and the actuator 111 is a DC motor or a stepping motor with a reducer. The actuator 111 is installed in the cavity formed by the casing 3 and fixed between the casing 3 and the main circuit board by the actuator bracket 112. On the inner wall on the opposite side of the installation side, its power output shaft is vertically downward and connected with the coupling 113 at the shaft end of the drive wheel shaft 115, so that the drive wheel 116 can be driven to rotate, and the spinning broken end detection device can be driven to move along the guide rail 7; Guide mechanism 2 mainly comprises guide wheel 22, guide wheel mounting plate 24 and guide wheel compression spring 26, and described guide wheel 22 is two rollers, and guide wheel 22 is installed on the guide wheel axle 23 that is vertically installed on guide wheel mounting plate 24 , the outer circular surface of the guide wheel 22 is engaged with the side of the guide rail 7, and the guide wheel mounting plate 24 utilizes a hinge 27 parallel to the guide rail 7 to be installed on the outside of the bottom surface of the housing 3 in parallel with the bottom surface of the housing 3, and can rotate around the hinge 27. The guide wheel hold-down spring 26 is sleeved on the spring guide rod 25, and one end of the guide wheel hold-down spring 26 is in contact with the outer side of the bottom surface of the housing 3, and the other side is in contact with the top surface of the guide wheel mounting plate 24 to apply pressure to the guide wheel mounting plate 24. Make the guide wheel mounting plate 24 compress the guide wheel 22 on the guide rail 7; the sound sensor 9 is installed on the shell 3 along the length direction of the ring plate 4, on the outer side adjacent to the ring plate 4, the transmission on the sound sensor The sound hole is horizontally or downwardly aligned with the part on the steel ring where the traveler closest to the sound sensor slides through; the power supply device 10 includes a conductive strip 102 installed on the guide rail and two conductive elastic pressing sheets 101, the conductive strip 102 is connected to the positive DC power supply, and the guide rail 7 is connected to the negative DC power supply. An insulating strip 103 is installed between the conductive strip 102 and the guide rail 7. One end of the conductive elastic pressing sheet 101 is installed on the outside of the bottom surface of the shell 3 by the binding post 105. The binding post 105 There is an insulating magnetic seat 104 between the bottom surface of the shell 3, and the other end of the conductive elastic pressing piece 101 is in contact with the conductive strip 102 and the guide rail 7 respectively and pressed tightly by its own elastic force, and the conductive elastic pressing piece 101 supplies power to the spun yarn breakage detection device; The power board 14 mainly includes a battery, a charging circuit and a voltage stabilizing circuit. The power supply board 14 is installed on the inner side of the bottom surface of the shell 3, and the power supply is provided by connecting the wires to the terminal 105. In order to prevent the unstable power supply caused by the poor contact between the conductive elastic pressing piece 101 and the guide rail 7 or the conductive strip 102, the power supply board is provided with a charging device. Battery and charging circuit, the power consumption of the spun yarn broken end detection device is provided by the rechargeable battery, and the power supply provided by the conductive elastic pressing sheet 101 is used for the charging circuit to charge the rechargeable battery; the main circuit board 12 is installed on the same side as the sound sensor 9 On the inner wall of the side of the shell 3, the main circuit board 12 mainly includes an audio signal processing circuit, an audio signal acquisition circuit, a microcontroller, an actuator drive circuit and a communication module; the human-computer interaction interface 13 is installed on the top of the shell 3, mainly including Keyboard and display screen, the keys on the keyboard are used for the user to control the operation of the spun yarn breakage detection device, input design spindle speed, front roller delivery speed, bobbin diameter, roving source, start and stop running and other parameters or commands, and display The screen is used to display the number of the spindle where the broken end occurs and the running state of the broken end detection device to the operator; the wireless communication module 36 includes a wireless communication circuit board 361 and an antenna 362, and the wireless communication circuit board 361 is installed on the inner side of the casing 3. Next to the main circuit board, it is connected with the main circuit board 12 and the antenna 362 through wires, and the antenna 362 is installed on the outside of the casing side. In addition to the display screen display of the spinning end detection device, the results of the spun end detection device are displayed. Check, a large display screen that can receive wireless signals is installed in the workshop, and the spun end broken detection device transmits the broken end detection result to the large display screen placed in the workshop through wireless transmission, which avoids the inconvenience of wiring in the workshop. The end detection device preferably uses a wireless communication method to send the broken yarn information to a large display screen that can receive wireless signals. The wireless communication method can use technologies such as Bluetooth or ZigBee, but it does not exclude the use of wired information transmission.

The improved scheme of the spun yarn breakage detection device of the present invention is characterized in that a spindle position and a headstock detection device (see Figs. 5 and 6) are added to the spun yarn breakage detection device to facilitate the control of the operation of the spun yarn breakage detection device. Specifically, two inductive switches 51 are added, and the inductive switch 51 is installed vertically with the ring plate on the lower part of the sound sensor, on the outer wall of the shell 3 near the ring plate side and is connected to the two DI ports of the main circuit board by wires, A spindle position steel plate 52 is installed on the ring plate corresponding to each spindle as the detection target of the inductance switch. Whether it has moved to the position of the steel plate 52 of the spindle position, thereby indirectly detecting whether the sound sensor 9 of the spinning end detection device has moved to the position of the steel ring, and if it has moved to the position of the steel ring, the sound detection and analysis of a spindle position will start; The end spindle position steel plate 53 is installed on the ring plate at the position of the spindle at both ends of each side of the spinning frame. The end spindle position steel plate 53 is longer than the spindle position steel plate 52, so that the two induction switches 51 can detect it at the same time, and the spun yarn is broken. If the micro-controller of the head detection device detects that the two inductive switches 51 are facing the end spindle steel plate 53 at the same time, it will make the actuator 111 change the steering after a sound detection and analysis, so that the spinning end detection device is on the guide rail. Change direction of movement. The spun yarn breakage detection device of the present invention can also judge the specific position of the spindle where the spun yarn breakage occurs on the spinning frame by using the spindle position and the headstock detection device. Machine number and information on which side of the spinning machine is located. During the movement of the spinning end detection device from the head of the machine, every time it passes through a spindle steel plate 52, the count is increased by 1, so that when it detects the occurrence of end breakage, it can be determined. The spinning machine platform where the broken end occurs, which side and the position of the spindle position, when the spinning end detection device moves to the end spindle position steel plate 53, the counter is cleared after the spinning end detection device is reversed and operated. In this embodiment, the inductive switch 51 adopts a non-contact inductive switch, but it does not rule out the use of other forms of contact switches or non-contact switches, such as inductive switches, Hall switches, travel switches, etc. The method of changing the switch to detect the target, for example, when using the Hall switch, it is necessary to add magnetic steel on the steel plate 52 of the spindle position and the steel plate 53 of the end position. This is the basic knowledge of this industry and will not be repeated.

The feature of the further improvement of the spun yarn breakage detection device of the present invention is that temperature and humidity sensors 15 are added to the spun yarn breakage detection device. The AD channel is connected, and the microcontroller of the spun yarn broken end detection device uses the temperature and humidity sensor 6 to detect the temperature and humidity at each spindle position, and sends the temperature and humidity data together with the broken end data to the host computer, which can benefit the host computer. Analyze the causes of broken ends on the machine, for example, most of the spindles have no broken ends in one doffing, only repeated broken ends on individual spindles, which is often caused by sudden changes in spinning tension due to poor mechanical conditions , If there are large-scale broken ends, it may be caused by improper temperature and humidity. In this embodiment, in order to reduce accessories and facilitate operation by operators, a touch screen is used instead of buttons and a display screen man-machine interface to make the interface more concise and increase the flexibility of configuration.

The further improvement of the spinning end detection device of the present invention is characterized in that an image sensor is added to the spinning detection device to detect whether a bobbin is inserted in the spindle position, and an embodiment of the improvement is to add a USB interface camera as an image sensor. Sensor, the camera is installed directly above the sound sensor, the lens is facing the spindle, the microcontroller collects the image data of the camera through the USB interface, and performs image processing on the collected image to judge whether there is a bobbin at the current detection spindle position, if there is no yarn If the tube exists, even if it is judged as decapitation according to the sound signal, it is not considered to be decapitated. This embodiment uses a camera with a USB port, but it does not exclude the use of line array or area array image sensors with other interfaces (such as 1394 or CameraLink interface, etc.). It is a relatively simple image processing problem to identify whether there is bobbin on the spindle by image processing method, and it belongs to the technical problem well known in this subject.

The spinning end detection device in the embodiment of the spinning end detection device of the present invention is all installed on the outside of the spinning locomotive for the convenience of installation and debugging, but it does not rule out that it is installed on the ring plate at the position inside the spinning frame .

The invention is not limited to the embodiments discussed above, but other variants can be deduced from the invention by a person skilled in the art, which also belong to the subject-matter of the invention.

Claims (10)

1. oneplant the spinning end breaking detection method being used for ring throstle, voice signal when it is characterized in that utilizing microcontroller to be spinned by sound transducer collection outside rings, LPF is carried out to the voice signal collected, and the feature of the sound produced according to steel traveler in filtered voice signal and rings fricting movement judges whether to there occurs spinning end breaking.

2. spinning end breaking detection method according to claim 1, it is characterized in that the feature of the described sound produced according to steel traveler in filtered voice signal and rings fricting movement judges whether to there occurs spinning end breaking and refers to if filtered voice signal all has the crest higher relative to the steel traveler distance sound transducer moment far away at each steel traveler that corresponds to close to moment of sound transducer, and the frequency that this crest occurs is more lower slightly than the frequency of spindle rotation, then judge that spun yarn is not as breaking end, otherwise, judge that spun yarn is as there occurs broken end.

3. spinning end breaking detection method according to claim 1, is characterized in that the feature of the described sound produced according to steel traveler in filtered voice signal and rings fricting movement judges whether to there occurs spinning end breaking and runs DSP program by microcontroller and automatically complete.

4. spinning end breaking detection method according to claim 1, is characterized in that described microcontroller is single-chip microcomputer or embedded controller.

5. spinning end breaking detection method according to claim 1, it is characterized in that described sound transducer is positioned at and rings level or the position slightly higher than rings on plumb height direction, be positioned at rings axle center and the perpendicular rectilinear direction of ring rail length direction in the horizontal direction, the minimum range in sound transducer distance rings vertical axle center is greater than the maximum outside diameter of steel traveler and ballooning of yarn movement locus in the horizontal direction, is as the criterion not affect normal spinning.

6. spinning end breaking detection method according to claim 1, is characterized in that described sound transducer is condenser type orthotype sound transducer.

7. a spinning end breaking checkout gear, it is characterized in that the spinning end breaking detection method design according to claim 1 of this spinning end breaking checkout gear, mainly comprise guide rail, driving mechanism, guiding mechanism, shell, sound transducer, electric supply installation, power panel, main circuit board, wireless communication module, human-computer interaction interface, described shell is a profile is rectangular-shaped metal material housing, described guide rail utilizes bolt and support to be arranged on the side of ring rail in horizontal direction, described driving mechanism mainly comprises executive component and driving wheel, described driving wheel is arranged on one end of live axle and is positioned at the outside of enclosure bottom, driving wheel cylindrical is meshed with guide rail side, live axle is through the brearing bore in the bearing block be arranged on enclosure bottom, the other end of live axle is positioned at shell inner cavity and connects with shaft coupling, described executive component is direct current generator or the stepper motor of band reductor, executive component is arranged in the inner chamber of shell formation, and utilize executive component support to be fixed on the inwall of shell, its power output shaft vertically downward and be connected with the shaft coupling of live axle axle head, described guiding mechanism mainly comprises directive wheel, directive wheel installing plate and directive wheel holddown spring, described directive wheel is two rollers, directive wheel be arranged on be installed vertically on directive wheel installing plate guide wheel shaft on, the outer circumference surface of directive wheel is meshed with the side of guide rail, directive wheel installing plate utilizes and the hinge of guide rail parallel is arranged on outside enclosure bottom and parallel with enclosure bottom, and can rotate around hinge, described directive wheel holddown spring is enclosed within spring guide, directive wheel holddown spring one end and enclosure bottom contact outside, opposite side contacts with the end face of directive wheel installing plate, applying pressure to directive wheel installing plate makes directive wheel installing plate be pressed on guide rail by directive wheel, described sound transducer is arranged on the shell outside relative with ring rail, and the sound transmission aperture of sound transducer is that level or downward-sloping direction are aimed at outside rings, described electric supply installation comprises and is arranged on bus on guide rail and two panels electrically conductive elastic compressing tablet, just bus connects dc source, guide rail connects dc source to bear, between bus and guide rail, insulation strip is installed, one end of electrically conductive elastic compressing tablet is abutted against terminal and is arranged on outside enclosure bottom, have insulation magnetic support between binding post and enclosure bottom, the other end of electrically conductive elastic compressing tablet also compresses by its own resilient with bus and guide rail contact respectively, described power panel mainly comprises battery, charging circuit and mu balanced circuit, and power panel is arranged on the inner side of enclosure bottom, and power supply to be connected with binding post by wire to be provided, described main circuit board is arranged in the shell side inner walls with sound transducer homonymy, and main circuit board mainly comprises audio signal processing circuit, audio signal sample circuit, microcontroller and interface circuit thereof, executive component drive circuit and communication module, described human-computer interaction interface is arranged on the top of shell, mainly comprises keyboard and display screen, described wireless communication module comprises wireless communication line plate and antenna, and wireless communication line plate is installed by main circuit board inside the shell, and be connected by the communication module of wire and main circuit board and antenna, astronomical cycle is in the outside in shell side face.

8. spinning end breaking checkout gear according to claim 7, is characterized in that described spinning end breaking checkout gear contains ingot position and headstock checkout gear.

9. spinning end breaking checkout gear according to claim 7, is characterized in that the temperature and relative humidity that described spinning end breaking checkout gear contains microcontroller and can be used for detected temperatures and humidity.

10. spinning end breaking checkout gear according to claim 7, is characterized in that described spinning end breaking checkout gear contains microcontroller for detecting the imageing sensor whether ingot position being inserted with spool.