JPH0261130A - Temperature control device for heating rotor - Google Patents

Abstract

PURPOSE:To carry out suitable thermal regulation by controlling operation of a heating unit based on the results of detection by a detector of change of state by disturbance and a temperature sensor. CONSTITUTION:Signals of rate detection from a rate sensor 4 giving the rate of change of state by disturbance which changes the temperature of roller shell 1 and of temperature detection by a temperature sensor 3 detecting the temperature of the roller shell 1 are input to a regulator 6. The regulator 6 can adjust set output-voltage of an inverter 8 charging a drive motor 2 with electricity and of a power controller 9 for regulation of charging a heater 11 with electricity based on the respective signals of detection and set input of a temperature-setting unit 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a temperature control device for a heating rotating body, and is suitable for application to, for example, a spinning/drawing heating roller device having a roller shell as a heating rotating body. It relates to a body temperature control device.

(Prior art) -i. In a spinning/drawing/heating roller device having a roller shell as a rotating heating element, the temperature and rotational speed of the roller shell are adjusted to appropriate values in accordance with the spun yarn that is the object to be heated. There are two control systems: a temperature control system and a speed control system. The temperature control system includes a temperature setting device that sets the target temperature, an operation unit that operates the heater that heats the roller shell, a temperature detector that detects the temperature of the roller shell, and a temperature sensor that operates according to the feedback signal from the temperature sensor. and a control unit that performs PID control on the operation amount of the operation unit,
Functions as a temperature control device. Further, the speed control device also functions as a speed control device including a speed setter, a motor operation section, a speed detector, and a speed control section. These two control systems attempt to promote optimal control based on detection information within each system.

(Problem to be Solved by the Invention) However, in such a conventional temperature control device for a heating rotating body, the amount of heat radiated from the roller shell to the outside due to windage damage etc. due to changes in the rotation speed of the roller shell. Although the rotational speed changes, the temperature control did not reflect the influence of this change in rotational speed, so the temperature of the roller shell fluctuated due to the change in the rotational speed of the roller shell.
So-called overshoots and undershoots, as shown in the figure, occurred. Additionally, if the amount of heat released, which is affected by the rotational speed of the roller shell, and the amount of heat consumed to heat the spun yarn differ, there will be a large difference in the time it takes for the temperature of the roller shell to stabilize at the target value. It became.

In other words, in such a conventional temperature control device for a heating rotating body, it is not possible to quickly adjust the control output when a disturbance that changes the temperature of the heating rotating body occurs, and the response to the disturbance is delayed and does not work properly. temperature control was not possible.

(Objective of the Invention) Therefore, the present invention detects a change in the state of a disturbance that changes the temperature of a heating rotating body, and quickly adjusts the control output when the disturbance state changes, thereby speeding up the response to the disturbance and achieving good temperature control. The purpose is to do the following.

(Means for Solving the Problems) In order to achieve the above object, a temperature control device for a heating rotary body according to the present invention includes a heating rotary body, a heating means for heating the heating rotary body, and a temperature control device for a heating rotary body. temperature detection means for detecting a change in disturbance state that changes the temperature of the heating rotating body; and disturbance state change detection means for detecting a change in disturbance state that changes the temperature of the heating rotating body; The invention is characterized by comprising a control means for controlling.

(Function) In the present invention, the disturbance state change detection means detects a change in the disturbance state that changes the temperature of the heating rotary body, and the disturbance state change detection means and the temperature detection means that detects the temperature of the heating rotary body detect Based on the information, the control means controls the operation of the heating means for heating the heating rotor.

Therefore, when a disturbance occurs, the control output by the control means is quickly adjusted based on the detection information from the disturbance state change detection means, and the response to the disturbance is accelerated and good temperature control is promoted.

(Example) Hereinafter, the present invention will be explained based on the drawings.

1 to 6 are diagrams showing one embodiment of the present invention, and show an example in which the present invention is applied to a heating roller device for spinning and drawing.

First, the configuration will be explained.

In Figure 1.2, 1 is a bottomed cylindrical roller shell (
A heater 11 (described later) serving as a heating means, such as an electromagnetic induction heating coil, is housed in the roller shell l. Roller shell 1 is drive motor 2
The drive motor 2 is connected to an output shaft 2a of the drive motor 2, and is driven by a drive motor 2. Further, a temperature sensor 3 (temperature detection means) having a temperature measuring element such as a thermocouple or a resistance temperature detector, for example a platinum resistance temperature detector, is attached to the output shaft 2a of the roller shell 1 or the drive motor 2. A speed sensor 4 is provided near the roller shell 1 or the output shaft 2a, and is made of a magnetic sensor or the like and samples pulses corresponding to the rotational speed of the roller shell 1.

Here, the speed detection signal from the speed sensor 4 indicates the rotational speed of the roller shell 1, that is, the degree to which the roller shell l radiates heat due to wind damage due to rotation, that is, the degree of disturbance state change that changes the temperature of the roller shell 1. The speed sensor 4 functions as a disturbance state change detection means. The temperature sensor 3 is connected to the R/F converter 5, and the R/F converter 5 outputs a temperature detection signal having a frequency corresponding to the resistance value of the temperature sensor 3, which varies depending on the temperature of the roller shell 1. The temperature detection signal of the temperature sensor 3 and the speed detection signal (pulse) of the speed sensor 4 are input to a controller 6 consisting of a microcomputer, etc., and the controller 6 determines the temperature detection signal based on each detection signal and the setting input of the temperature setting device 7. The output setting voltages of an inverter 8 that energizes the drive motor 2 and a power regulator 9 such as Cyrisk that controls energization of the heater 11 are adjusted, and the temperature display 1o is prompted to display.

Further, as shown in FIG. 2, the controller 6 is a single controller that controls the temperature of the heater 11 and the speed of the drive motor 2 by known PID control, and includes a temperature setting device 7,
The temperature control system of the heater 11 is composed of the controller 6, the power regulator 9, the temperature sensor 3, etc., and the speed control system of the drive motor 2 is composed of the speed setting device 12, the speed controller 29, the inverter 8, the speed sensor 4, etc. system is configured.

The controller 6 uses the output of the temperature setting device 7, the temperature sensor 3
The operating amount of the power regulator 9 is PrD controlled based on the temperature detection signal of the speed sensor 4 and the speed detection signal of the speed sensor 4. Specifically, the controller 6 is configured as shown in FIG.
It has an I10 port 13 connected to. Each information signal input to the I10 boat 13 is taken into the communication CPU 14 via the I10 bus, and stored in the common RAM 15 of the two boats as necessary. Communication CPU 14 is EP
-Program and EEP written in ROM16-
Each input signal and the command information from the main control CPU 18 stored in the common RAM 15 are processed based on the bank amplifier data stored in the ROM 17, and the processing results are stored in the common RAM 15 or output to the outside. or The CPU 18 uses a common RAM 15, a 5-RAM 21 as a work area, and a CP for output control based on the program written in the EP-ROM 19.
It takes in data between U22 and 2-point RAM 23, or outputs command information as necessary. CPU
22 is a PID that exchanges data with the 2-port Rk-M 23 and the CPU 18 based on the program written in the EP-ROM 24, and corresponds to the temperature information and speed information read from the input port 25 via the counter 26.
Control constants are calculated, and the output set voltage of the inverter 8 and the output set voltage of the power regulator 9 are output from the output port 28 via the D/A converter 27. That is, the controller 6, together with the temperature setting device 7 and the power regulator 9, constitutes a control means 30 that controls the operation of the heater 11 based on rain detection information from the temperature sensor 3 and speed sensor 4.

The temperature control of the roller shell 1 with the above configuration is as follows:
For example, the step of setting the target temperature of the roller shell 1 using the temperature setting device 7, and the step of setting the target temperature of the roller shell 1 using the temperature sensor 3.
a step of detecting the temperature of the temperature sensor 3 by the controller 6;
A step of determining the deviation between the current temperature of the roller shell l and a target temperature from The heating conditions for the roller shell 1 are determined in order to minimize the deviation, and the output setting voltage of the power regulator 9 corresponding to the heating conditions is output and the heater 11 is adjusted as necessary.
The method includes a step of heating the roller shell 1 of.

In addition, in this embodiment, the optimum control constant is used depending on whether the roller shell 1 is rotating or stopped, which corresponds to the presence or absence of disturbance. 4. A first temperature control method of switching the PID constants ■ to ■ shown in FIG. a second temperature control method of determining a constant and changing the heating conditions of the roller shell 1 by the heater 1 so that the temperature of the roller shell 1 matches the target temperature based on at least the control constant and the temperature deviation; I'm trying to do what I can.

Note that the PID constants ■ to ■ shown in FIG. 4 are different constants set in advance, and one of the PID constants ■ to ■ is selected depending on the rotational speed (V) and rotational state of the roller shell 1. . In the second temperature control method, the rotation speed of the roller shell l is set to ■, and the control constants of the PID control are functions of the rotation speed, P (v), Ti (v), Td.
(v) and the control output is M (t), then M (t) = P (v) e (t) +Ti
(v) ed t However, e (t): Deviation between target temperature and current temperature P (v): Proportional constant function Ti (v): Integral constant function Td (v): Differential constant function Mφ: When deviation is 0 It is expressed as the amount of operation. That is, the control constants P, Ti, Td
The temperature is controlled while being selected according to the rotational state of the roller shell 1 (stable speed state, speed increase state, speed decrease state, etc.). For example, a PID constant function suitable for temperature control in a stable speed state is selected. (determined by rotational speed V), PIDID function suitable for speed increase condition;
(the constant is determined by the speed increase rate), the constant is determined by the PIDID constant function graph rotation speed V and the speed decrease rate suitable for the speed decrease state), etc. are set in advance.

Next, the action will be explained.

FIG. 5 is a flowchart of a control program for implementing the first temperature control method, and this program is repeatedly executed at predetermined time intervals.

First, the target temperature set in the temperature setting device 7, the current temperature of the roller shell 1 from the temperature sensor 3, and the rotation speed information of the roller shell 1 from the speed sensor 4 are input at P1, and the information about the rotation speed of the roller shell 1 from the speed sensor 4 is input at P2. It is determined whether the current detected temperature is below the proportional band. At this time, if the current detected temperature of the temperature sensor 3 is below the proportional band, the heater 1 is
The operation amount of the power regulator 9 is adjusted so that the output of the temperature sensor 3 becomes 100%, and if the current detected temperature of the temperature sensor 3 is not below the proportional band, the current detected temperature of the temperature sensor 3 falls below the proportional band in P4. It is determined whether the

If the current detected temperature of the temperature sensor 3 is above the proportional band at P4, the operation amount of the operating unit 9 is adjusted to set the output of the heater 1 to 0% at P, and the current detected temperature of the temperature sensor 3 falls within the proportional band. If not, it is determined in P6 whether the rotational speed V of the roller shell 1 is within a predetermined target value range. If the rotational speed ■ is within the target value range at P6, the PID constant ■ is selected at P7, the PID control output is calculated at P8, and then the control output corresponding to the calculation result is prompted at P. On the other hand, if the rotational speed V is not within the target value range at P6, then P. When the rotational speed V (peripheral speed) is 0
(m/win). At this time, if the rotational speed V is 0 (m/min), PI at P++
After the D constant ■ is selected, proceed to P, and the rotation speed ■ is 0.
(m/min), it is determined at p+z whether the roller operation signal is turned on from the outside. If the roller operation signal is ON at Plg, it is determined whether the rotational speed V is lower than the target value at Pl3, and if the rotational speed ■ is lower than the target value at Pl3, the process proceeds to Pl4 and the PID constant ■ is selected. be done. When the roller operation signal is not ON at p+z and when the rotation speed ■ is not lower than the target value at Pl3,
Proceeding to Pl5, the PID constant ■ is selected. When PID constant ■ or ■ is selected in Pl4 or Pl5,
In P8, control output calculation is executed based on each selected constant,
A control output is then prompted at P.

FIG. 6 is a flowchart of a control program for implementing the second temperature control method, and this program is executed at predetermined intervals.

First, the target temperature, the current temperature of roller shell 1, and the rotation speed information of roller shell 1 are input in PZI, and P2
In □, it is determined whether the current detected temperature of the temperature sensor 3 is below the proportional band. At this time, if the current detected temperature of the temperature sensor 3 is below the proportional band, the operation amount of the power regulator 9 is adjusted by Po so that the output of the heater 11 is 100%, and the current detected temperature of the temperature sensor 3 is If not below the proportional band, it is determined at Pt4 whether the current detected temperature of the temperature sensor 3 is above the proportional band. If the current detected temperature of temperature sensor 3 is above the proportional band in Pt4, Pu
The operation amount of the power regulator 9 is adjusted to make the output of the heater 11 0% in s, and unless the current detected temperature of the temperature sensor 3 is above the proportional band, the rotation speed of the roller shell l is set to the target in pz6. It is determined whether the value is within the range. If the rotational speed V is within the target value range in pzi, proceed to Pt'l and set P.
After the ID constant function ■ is selected, the PID control output is calculated in pzs, and then P2. The control output corresponding to the calculation result is prompted.

On the other hand, if the rotational speed V is not within the target range at PZ&, P
At 2O, the rotational speed V (peripheral speed) is O (m/lll1n)
It is determined whether At this time, the rotation speed V is 0 (m/
1lIin), the process advances to Pt7 and the rotational speed V is 0.
If not (m/mtn), the process proceeds to Pffl, where it is determined whether the roller operation signal from the outside is ON.

If the roller operation signal is ON at P3+, it is determined whether the rotational speed V is lower than the target value at PJz, and if the rotational speed V is lower than the target value, the process proceeds to P33 and the PID constant function ■ is selected. . When the roller operation signal is not ON at PH1 and when the rotational speed ■ is not lower than the target value at P3Z, the process proceeds to P34, where the PID constant function ■ is selected, and then the steps below Pill are executed.

As described above, in this embodiment, the rotational state of the roller shell 1 is detected using the speed sensor °4 of the speed control system, and the first or second temperature control method is implemented. Optimum PID constant ■~■ or PID constant function ■~ that takes into account the temperature change of the roller shell 1 due to the influence of wind damage (disturbance) according to the rotational state (rotation speed V and rotational drive/stop of the roller shell 1) ■ is selected (used properly), so overshooting or undershooting of the temperature of the roller shell 1 due to the influence of windage can be prevented by quickly adjusting the control output (operated amount), and this disturbance can be prevented. Good temperature control without response delay is promoted.

In this embodiment, the disturbance is explained as a change in the rotational state of the roller shell 1, but the present invention is not limited to this, and the present invention is not limited to this, and the present invention is not limited to this. (changes in the type of spun yarn, changes in yarn thickness, number, etc. that change the amount of heat consumed for heating, etc.) are equipped with a disturbance state change detection means. In this case, changes in the supply conditions of the spun yarn are often input into the controller 6 from an external host computer, etc., and the optimum constant is selected. At the same time, when the rotational speed of the roller shell 1 is changed, the temperature of the roller shell 1 can be stabilized at the target temperature in a short time, and variations in the stabilization time can be prevented. For example, if a heat insulating box is added to the heater, the opening/closing signal of this insulating box can be imported into the temperature control system, and the control constant can be selected based on the change in the opening/closing signal. is the state change of the disturbance.

(Effects of the Invention) According to the present invention, the disturbance state change that changes the temperature of the heating rotor is detected by the disturbance state change detection means, and the detection information of the disturbance state change detection means and the temperature of the heating rotor are detected. Since the control means controls the operation of the heating means that heats the heating rotary body based on the detection information of the temperature detection means, when a disturbance occurs, the control output of the control means is quickly adjusted to improve responsiveness to the disturbance. temperature control and can promote good temperature control.

[Brief explanation of the drawing]

1 to 6 are diagrams showing one embodiment of a temperature control device for a heating rotating body according to the present invention, in which FIG. 1 is an overall configuration diagram thereof, FIG. 2 is a block diagram showing its control system, and FIG. The figure is a block diagram of a controller constituting the control means, FIG. 4 is a graph showing the relationship between changes in disturbance and operation control of the heating means in one control example, and FIG. 5 is a program for one control example. Flowchart FIG. 6 is a flowchart showing a program of another example of control. FIG. 7 is a graph for explaining the problems of the conventional temperature control device for a heating rotating body. 1...Roller shell (heating rotating body), 3...
...Temperature sensor (temperature detection means), 4... Speed sensor (disturbance state change detection means), 11...
Heater (heating means), 30... Control means.

Claims (1)

[Claims] a heating rotating body, a heating means for heating the heating rotating body, a temperature detecting means for detecting the temperature of the heating rotating body, a disturbance state change detecting means for detecting a change in the state of a disturbance that changes the temperature of the heating rotating body; 1. A temperature control device for a heating rotating body, comprising: control means for controlling the operation of the heating means based on detection information from the temperature detection means and the disturbance state change detection means.