JPH10320657A - Entry detection input device - Google Patents

Abstract

(57) [Problem] To easily transmit a signal for recognizing the presence of an intruder to an operator himself / herself who operates equipment in a closed cabin regardless of day and night. SOLUTION: A plurality of input stages 1 for inputting a pulse signal as an input signal, a detection unit 20 for cutting a DC component of the input signal 3 and extracting only an AC component of a predetermined arbitrary frequency, A pulse shaping means 21 for shaping the detection signal captured by the detection means 20 into a pulse shape; a pulse width detecting means 22 for detecting the ON / OFF pulse width of the pulse signal shaped by the pulse shaping means 21; Determining means 23 for determining whether or not the pulse width is the set pulse width and determining whether or not the pulse width is continuously obtained in the same cycle a predetermined number of times. In addition, the input stage 1 is provided in a cabin provided in the equipment of the heavy equipment, and the input stage 1 is provided on the exterior surface of the equipment to input an entry detection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input device for capturing the output of an entry detection for detecting an entry at a construction site or the like with a plurality of output units in a device such as a construction machine or a heavy machine.

[0002]

2. Description of the Related Art Conventionally, a safety checker who separately checks the safety of work around a shovel car or the like is provided, and the safety checker constantly checks the safety on the right side and the back side, which is a blind spot of the shovel car, and suddenly operates. Work areas to deal with the turning of heavy construction equipment and heavy machinery. When the safety checker determines that there is danger, the operator who operates equipment such as a construction machine or a heavy machine is notified of the danger by using a flashing display stick of a mobile phone or a portable wireless device.

[0003] In recent years, to compensate for rising labor costs and a shortage of workers,
In order for construction equipment and heavy equipment to safely work on construction sites, etc., a device that detects an intruder without human intervention when a person or the like enters the work area carelessly is desired. I have.

[0004] Here, although it is not appropriate to raise the prior art, an "entry detection output device" filed concurrently with the present invention will be described below because of the nature of the present invention.

[0005] An "entry detection output device" filed concurrently with the present invention blinks a light-emitting body at a construction site or the like, detects entry into a danger area, and sequentially sends an entry detection signal to an output unit located at the last stage. Among the plurality of output units to be transmitted, there is provided an output unit which has an output stage different from the blinking output of the light emitter and performs output.

[0006] Reference numeral 11 shown in FIG. 6 indicates a dangerous area at a construction site or the like.
This is one of a plurality of output units that include a light emitting body 2 and a light emitting body 13 and perform blinking lighting in a cordless manner.

The output unit 11 includes a light emitting means 14 for outputting a pulsed ON / OFF light by a light beam to the other output unit 11 as a reset light pulse R separately from the light emitting body 13, and another output unit 11. A light receiving element 15a for receiving the reset light pulse R sent from the light emitting element 14a of the light emitting means 14 which has output the light;
And a light receiving unit 15 for generating a reset signal for each reset light pulse.
A light receiving element 15a of the light receiving means 15 is rotatable in the horizontal direction, an angle adjusting means X for adjusting the axial directions of the light receiving element 15a and the light emitting element 14a to different angles, and a timer for receiving the reset signal A control unit 16 having timer control means for initializing a value, and means for inhibiting the output of the light emitting means 14 for a fixed time when a reset signal is not obtained within a predetermined time and the time is up. It has.

The output unit 1 located at the last stage
In 1, an output stage 19 for performing the output of the entry detection by flash light or the like separately from the blinking output of the light emitting body 13 is fixed by a belt. A night detecting means 18 for detecting day and night.
And the solar cell 10 to charge and discharge the battery cell 12.

[0009] In the above-mentioned conventional technique, the operator himself / herself operating the construction machine or the heavy equipment checks the signal output from the output unit to know the presence of the intruder.

[0010]

In the above-mentioned conventional safety checker who uses a portable flashing display stick or a portable wireless device to notify the danger, the operator who operates the equipment at the construction site directly checks the presence of an intruder. However, there is a problem that it cannot be performed.

That is, in general, only a minimum number of safety checkers are arranged at a construction site due to labor cost savings and a shortage of workers, and they are not arranged for every dangerous heavy equipment. .

[0012] For this reason, inadvertently dangerous infants and children in situations such as during the night when the visibility is not good, such as at night, or when there is a slight absence of a safety checker or attention is paid to other things. When entering the area, or when accidentally entering the dangerous area due to carelessness, there is a problem in safety confirmation.

In the "entry detection output device" filed at the same time as the present invention, the signal output from the output stage of the output unit is used by an operator operating a construction machine or heavy equipment to perform an operation performed by a safety checker. Similar to the confirmation, there is a problem that the confirmation must be performed by changing the line of sight in the direction of the output unit.

That is, in the operation of a shovel car or the like, the driver's eyes are always concentrated on the right front end of the arm. For this reason, if the output unit is placed in a position where it is difficult to confirm, or if it stops at a position where it is difficult to confirm by moving or turning, pay attention to the weighted object and turn while paying attention to safety. In some cases.

[0015] This is in a messy environment that is continuously affected by noise and dust. In order to carry out construction accurately and quickly, the cabin door is closed, and the nerves are concentrated around the workpiece to operate the equipment. It is a trouble that arises from doing so.

Therefore, a person sitting in an operation seat for operating the heavy equipment receives a signal sent from a device for performing unintentional entry detection and informs the presence or absence of an entry detection signal directly in the cabin where the operator is located. An input means was desired.

An object of the present invention is to provide an entry detection input device for easily transmitting a signal for allowing a worker who operates equipment in a closed cabin day or night to recognize the presence of an intruder. And

[0018]

In order to solve the above-mentioned problems of the prior art, an approach detection output device according to the present invention blinks a luminous body at a construction site or the like and detects entry into a danger area. Among a plurality of output units that sequentially transmit an entry detection signal to an output unit located at an input unit that captures an entry detection output that is output by a different output stage than the blinking output of the luminous body, wherein the output stage outputs A plurality of input stages for inputting a pulse signal to be input as an input signal, and a detecting means for cutting a DC component of the input signal and extracting only an AC component of a predetermined arbitrary frequency,
A pulse shaping means for shaping the detection signal captured by the detection means into a pulse shape; a pulse width detecting means for detecting the ON / OFF pulse width of the pulse signal shaped by the pulse shaping means; and a preset pulse A determination means for determining whether or not the width is equal to or less than a predetermined number of times and sequentially determining whether or not the fish is caught in the same cycle.The output of the determination means is provided to a construction machine or a heavy equipment. And the input stage is provided on the exterior surface of the device to input an entry detection.

Further, if the input stage is provided near the upper surface of the cabin, which is the exterior surface of the equipment, and the input of the entrance detection is performed by an optical signal irradiated upward from below,
Even the output signal from the optical means can be easily captured.

Further, it is preferable that the output of the judging means is made by at least one of a light emitting means and a buzzer sound provided near the front position in the cabin.

(Operation) With the above-described configuration, the present invention can perform the following operation. That is, a plurality of input stages for inputting a pulse-like signal, and extracting only an AC component of an arbitrary frequency from the input signal and shaping it into a pulse-like shape, the frequency of the signal source can be increased even in a noisy construction site. A change in only the signal in the band can be captured in a pulse form in any of a plurality of input stages. Also,
The determination unit determines whether the pulse width is a predetermined pulse width based on both the ON portion and the OFF portion of the pulse, and determines whether the noise is captured continuously in the same cycle by a predetermined number of times. The signal is cut and only the signal with the same pulse width as the signal source is extracted, and it is determined that the signal is an input signal when its cycle is continuously acquired. Therefore, it can enter accurately even in a noisy environment. The output of the detection can be captured. Further, even in the case of a moving device, a signal input range can be widened by capturing signals in a wide angle by a plurality of input stages.

Further, if the input stage is provided near the upper surface of the cabin, which is the exterior surface of the equipment, and the input of the entrance detection is performed by an optical signal emitted upward from below,
The upper position of the cabin is considerably high, so that the input stage can be installed at an angle downward. Therefore, even if the signal source is light, sunlight is not directly input to the input stage, and an optical signal can be easily captured.

Further, if the output of the judging means is performed by at least one of a light emitting means or a buzzer sound provided near the front position in the cabin, the output of the judging means may be changed in a closed cabin which repeatedly moves and turns. Even if the operator is working, even if the line of sight is always concentrated on the right front end of the arm, it is extremely easy to recognize the presence or absence of the input by the light or sound signal directly emitted from the front of the operator. be able to.

[0024]

FIG. 1 shows an embodiment of the present invention.
This will be briefly described with reference to FIGS.

The entry detection output device according to the present invention includes a plurality of output units which blink a light emitter at a construction site or the like, detect entry into a dangerous area, and sequentially transmit an entry detection signal to an output unit located at the last stage. In an input device for capturing an intrusion detection output output from an output stage different from the blinking output of the light emitter, a plurality of input stages 1 for inputting a pulse signal output from the output stage as an input signal 3. A detecting means 20 for cutting out a direct-current component of the input signal 3 and extracting only an alternating-current component having a predetermined arbitrary frequency; and a pulse shaping means 21 for shaping the detection signal obtained by the detecting means 20 into a pulse shape. And pulse forming means 21
Pulse width detecting means 22 for detecting the ON / OFF pulse widths of the pulse signals formed in step (1), determining whether the pulse width is a preset pulse width, and continuously in the same cycle for a preset number of times A determination means 23 for determining whether or not the fish are sequentially caught; an output of the determination means 23 (output by the output device 2) is performed in a cabin 6 provided in a construction machine or heavy equipment 7; 1 is provided on the exterior surface of the device to input an entry detection.

The input stage 1 is provided in the vicinity of the upper surface of the cabin 6 which is the exterior surface of the equipment, and the input of the entry detection is performed by an optical signal emitted upward from below.

Further, the output of the judging means 23 (output by the output device 2) is performed by at least one of the light emitting means 2a and the buzzer 2b provided near the front position in the cabin 6.

The approach detection input device of the present invention constituted in such an embodiment is capable of transmitting a signal for allowing an operator who operates equipment in a closed cabin to recognize the presence of the approacher irrespective of day or night. This has the effect of facilitating transmission.

[0029]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show an embodiment of the present invention. FIG. 1 shows an example in which the present invention is applied to a shovel car. An input stage 1 is provided near an upper surface of a cabin 6 which is an exterior surface of a shovel car 7, and a light emitting unit and a buzzer sound are provided near a front position in the cabin 6. An entry detection input device including the device 2.

This entry detection input device blinks the luminous body 13 at the construction site, detects entry into the danger area, and sequentially transmits a signal of the entry detection to the output unit Ph located at the last stage. (P
a, Pb, Pc,..., Ph)
Output unit P having an output stage different from the blinking output of
This is a device for inputting an entry detection output (output by the flash light 3) 3f, 3g, 3h output by f, Pg, Ph.

In this approach detection, the presence or absence of an intruder is detected by scanning in the direction indicated by the dotted arrow in the figure. Then, when an intruder is detected at the * mark shown between Pc and Pd in the figure,
An approach detection signal is transmitted from Pd to Pe ... Ph. Therefore, the output units denoted by Pf, Pg, and Ph have built-in strobe circuits, each of which irradiates a flash light toward the input stage 1.

This flash light outputs a 200 msec width pulse of 50% duty three times in succession as shown in FIG. FIG. 4A shows the flash light 3. The signal waveforms of the respective components shown in FIGS. 4A to 4K are denoted by the same reference numerals in FIG. 5 and will be described below.

The flash light 3 is composed of five photodiodes 1
a to 1e. The five input stages 1 are gradually directed in different directions, and are arranged in a row in an arc shape along the side surface at the upper portion of the left side surface of the cabin indicated by 6 in FIG. Further, five photodiodes 1 are provided on the inner rear side of the cover indicated by 4 in FIG. 3 via optical means (such as a lens and a filter). The cover 4 opens to the lower left, and the opening at the tip is greatly expanded.
It is fixed to the cabin 6 by the stopper 5.

When the flash light 3 enters one of the five photodiodes 1a to 1e, a signal shown in FIG. At the level indicated by L in FIG. 5, indirect light noise such as sunlight is generated. Here, the pulse change of the flash light 3 is captured by the capacitor C, the DC component indicated by L of the input signal is cut, and the diode D1
To cut the positive signal and detect the signal (detection means 20)
And (c) only the AC component indicated by the signal wave is extracted.

This signal is inverted and amplified by AMP1, and high-frequency noise is cut by capacitor C1.
Signal wave. Here, VDz indicated by a dotted line in FIG.
The level is the voltage level of the Zener diode Dz, and signals below this voltage are cut off. Then, after being integrated by the resistor R1 and the capacitor C2, it is shaped into a TTL level (5V level) pulse by the Zener diode D of the AMP2 (pulse shaping means 21) to obtain the signal (e) in FIG.

The TTL level pulse signal is inverted in phase by an inverter and is divided into (f) and (g) signals. On the other hand, the 1 KHz clock pulse (k) created by the transmission circuit is ORed with the signals (f) and (g) by the AND gate to obtain the signal waves (k) and (k), respectively. .

As described above, each signal obtained by separating the ON (high level) / OFF (low level) of the pulse signal formed by the pulse forming means into the waveforms shown in (q) and (k) is a U counter Is sent to the D counter, and the number of clock pulses is counted by the pulse width detecting means 22 (CPU) for detecting the pulse width.

When the IN3 port is at the H (high) level (during operation of the D counter), the CPU reads the count data of the U count from the IN1 parallel 8-bit port,
When the N3 port is at the L (low) level (during U counter operation), the count data of the D count is transferred to the IN2 parallel 8b.
Reading from the it port. The U and D counters are cleared after reading the data and are ready for the next counting operation.

Next, the CPU calculates a pulse width from the read data and determines whether or not the pulse width is a preset pulse width. That is, the pulse width is calculated from the number of clock pulses of 1 KHz (= 1 msec), and 215 msec and 190 msec shown in FIG.
c, while obtaining 198 msec, while 1 shown in FIG.
93 msec and 214 msec have been obtained. The pulse widths correspond to (1) to (5) of the signal wave shown in FIG.

Therefore, the flash light 3 has a duty of 50%
Are output three times in succession, so that the calculated pulse is Pi (i = 1 to 5)
Then, Pi becomes 180 msec <Pi <220 mse
It is determined whether it is c. The upper and lower limits of the pulse width are set in consideration of the overlap due to time delay from a plurality of output stages.

This determination is made every time the number of pulses of each of the U and D counters is input. Further, it is determined whether or not the signals are sequentially captured in the same cycle by a preset number of times.

Here, the flash light 3 is continuously flashed three times as shown in FIG. Therefore, the determination is made based on whether or not five consecutive ON / OFF pulses (1) to (5) in FIG.

As described above, the double determination means 23 () determines whether or not the pulse width is the predetermined pulse width and determines whether or not the pulse width is continuously obtained in the same cycle by the predetermined number of times. CPU).

The result of this determination is made from the OUT1 output port of the CPU via the transistor. In the embodiment shown in FIG. 4, the output is performed by a light emission 4 (light emitting means) having four high-brightness LEDs 2a and a buzzer sound 5 by a piezoelectric buzzer (Bz) 2b.

The output device denoted by reference numeral 2 in FIG. 2 has two types of outputs based on a light emitting means 2a and a buzzer sound 2b. With this output device 2, an operator who operates the excavator car 7 from the chair 6a, regardless of the turning position of the cabin 6, is within the input range of the input stage 1 (a plurality of input stages 1a to 1e). Can be easily recognized without confirming the output unit Ph.

As described above, according to the above-described embodiment, even in a noisy construction site, a change in only a signal in the frequency band of the signal source can be captured in a pulse form in any one of the plurality of input stages 1. . From this, it is possible to accurately capture the output of the entry detection and to capture a signal in a wide-angle manner with the plurality of input stages 1 even for a moving device, thereby increasing the signal inputtable range. Further, by installing the input stage 1 at a high position such as the upper surface of the cabin 6 with a downward inclination, even if the signal source is light or the like, the input stage 1 can easily receive light without direct sunlight. You can catch the signal. In addition, even if the operator works in the closed cabin 6 that repeatedly moves and turns, even when the line of sight is always concentrated on the right front end of the arm, the presence or absence of the input is checked by the front of the operator. It is very easy to recognize the entry detection output from light or sound signals directly emitted from the device.

In this embodiment, the flash light 3
However, the same effect can be obtained not only by light but also by pulse signal input by acoustic means such as ultrasonic waves. Further, in the embodiment, the number of the input stages 1 is five (1a to 1e). However, the number is not limited to five and may be two. Further, the output of the flash light 3 is set to be continuous three times, but may be set to be continuous twice. Furthermore, if the input stage 1 is a device exterior surface, the right or left side is determined according to the arrangement and the detection direction of the output unit, and is not limited to the position near the upper surface on the left side of the cabin 6. Further, the output of the determination means (CPU) is the light emitting means 2a and the buzzer sound 2b provided near the front position in the cabin 6, but the output device 2 is not limited to any one, and may be a display device or It may be audio output. That is, the present invention is not limited to the above embodiments, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0048]

According to the present invention, there is provided an entry detection input device for easily transmitting a signal for recognizing the presence of an intruder to an operator himself / herself operating a device in a closed cabin regardless of day or night. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the cabin.

FIG. 3 is a sectional view showing the input stage.

FIG. 4 is a circuit diagram showing a control system.

FIG. 5 is a timing chart showing the signal waveform.

FIG. 6 is a configuration diagram showing an output unit.

[Explanation of symbols]

 Reference Signs List 1 input stage 2 output device 2a light emitting means 2b buzzer 3 flash light (input signal) 6 cabin 7 excavator (equipment such as heavy equipment and construction equipment) 20 detecting means 21 pulse shaping means 22 pulse width detecting means 23 determining means

Claims (3)

[Claims] In a plurality of output units, a light-emitting body is turned on and off at a construction site and a detection of an approach to a danger area is performed, and a signal of the detection of the approach is sequentially transmitted to an output unit located at the last stage. An input device for capturing an entry detection output output from another output stage different from the blinking output of the input stage, wherein a plurality of input stages for inputting a pulse-like signal output from the output stage as an input signal, and a DC component of the input signal is cut off A detecting means for extracting only an AC component having a predetermined arbitrary frequency, a pulse shaping means for shaping the detection signal obtained by the detecting means into a pulse shape, and an ON of the pulse signal shaped by the pulse shaping means. Pulse width detecting means for detecting the pulse width of / OFF, and determining whether or not the pulse width is a predetermined pulse width, and continuously in the same cycle a predetermined number of times Determination means for determining whether or not the fish are sequentially caught.The output of the determination means is performed in a cabin provided in a construction machine or a heavy equipment, and the input stage is provided on the exterior surface of the equipment, and the input of the entry detection is provided. An entry detection input device characterized by performing the following. 2. The entry detection input device according to claim 1, wherein an input stage is provided at a position near the upper surface of the cabin, which is an exterior surface of the equipment, and the entry of the entry detection is performed by an optical signal irradiated upward from below. 3. The approach detection input device according to claim 1, wherein the output of the determination means is performed by at least one of a light emitting means and a buzzer sound provided near a front position in the cabin.