JP2871123B2 - Human body detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door
The present invention relates to an automatic door sensor that detects an object .

[0002]

2. Description of the Related Art Automatic doors using conventional photoelectric sensors
The sensor emits infrared light to the floor in advance, such as when the power is turned on.
Emits light, receives infrared light reflected from the floor, and
Detects and stores the amount of infrared reflection
Is compared with the current reflection amount as the reference reflection amount, and
Some devices detect an approaching object.

FIG . 4 shows an example of the configuration. This photoelectric type self
When the power is turned on, the pulse signal from the oscillation circuit 1
A signal is generated, and the pulse train signal is amplified by the amplifier circuit 2.
The infrared projector 3 is driven by the output thus emitted to emit infrared rays.
You. Then, the infrared light reflected from the floor is
The light is received at 4. The received light signal is amplified by an amplifier circuit 5.
The reference voltage determination circuit 6 stores the force as a reference reflection amount.
Note that the output of the amplifier circuit 5 is a voltage signal.
If the reference reflection amount is referred to as the reference voltage,
There is a case.

When detecting an intruding object (intruder),
An object enters the monitoring space between the automatic door sensor and the floor.
The amount of infrared reflection changes from the reference reflection
To detect the presence of an object.
You. Specifically, the output of the reflected wave received by the light receiver 4 is increased.
The amplified output is amplified by the width circuit 5 and the amplified output is
Compared with the reference voltage, the judgment circuit 8 supervises using the comparison result.
A judgment is made as to whether an object is present in the visual space.
The disconnection result is output as a detection signal.

[0005]

However, as described above,
Automatic door sensor uses a reference voltage to detect intruding objects.
Is determined when the power is turned on.
Was. In other words, after turning on the power, the amount of infrared reflection
Whenever the substance to be changed enters the monitored space,
There was a problem which caused a malfunction that the moving door opened .

[0006] The present invention has been made in view of the above, it is an object to minimize the malfunction that by the substance for changing the amount of reflection of infrared or snow
It is an object of the present invention to provide an automatic door sensor .

[0007]

According to the present invention, in order to achieve the above object, a detection output is obtained by a photoelectric sensor.
Even after a certain period of time has passed since the
When the detection output of the sensor of the
Close signal generating means for outputting a close signal is provided.

It is to be noted that the detection and detection by the photoelectric type sensor are performed.
After a certain period of time from when the force is obtained,
The automatic door is closed because the detection output of the sensor of the luss type cannot be obtained.
After that, when the signal is output,
Within a certain period of time from when the detection output is obtained,
Automatic only when the detection output of the pulse type sensor is obtained
If an open / close judgment means that outputs a signal to open the door is provided,
This is preferable because malfunction can be minimized.

In addition, the open / close determination means is provided with a photoelectric system once.
Within a certain period of time from when the detection output is obtained by the sensor
In addition, the detection output of the ultrasonic pulse sensor is obtained and
After outputting the signal to open the door, any of the sensors
Outputs a signal to open the automatic door when an object is detected by
Providing a function of returning to a normal state is suitable for a case where a substance , such as snow, that changes the reflection amount of infrared rays rarely enters the monitoring space .

[0010]

According to the present invention, by providing the above structure, the light
Also sensors electrostatic system is malfunctioning by substance for changing the amount of reflection of infrared such as snow, it is possible to cancel the malfunction state by the output of the sensor of the ultrasonic pulse method, snow
It is possible to minimize a malfunction caused by a substance that changes the amount of reflected infrared light .

[0011]

FIG. 1 shows an embodiment of the present invention. Of this embodiment
The automatic door sensor has the configuration of FIG. 4 described in the section of the background art.
Ultrasonic pulse type sensor B to photoelectric type sensor A
There is a so-called composite type that combines them. Photoelectric system
The structure of the sensor A is exactly the same as the conventional one.
Therefore, the description is omitted . Also, as the ultrasonic pulse type sensor B, the ultrasonic pulse is intermittently transmitted and the object X
And receives a reflected wave by, are used as the time required for transmission and reception waves of the ultrasonic pulses a so-called distance measuring method for performing detection of an object X to determine the distance to the object X.

[0012] More specifically, feed also serves for reception have use the ultrasound transducer 9, intermittently to transmit ultrasonic pulses from the ultrasonic transducer 9 by transmitting circuit 10, according to the object X The reflected wave is received by the ultrasonic vibrator 9, the received wave output is amplified by the wave receiving circuit 11, and further amplified and detected by the amplification detection circuit 12, and the object detection circuit 13 calculates the distance from the output to the object X. And
The presence of the object X is detected by determining whether the object X exists in the monitoring space .

[0013] The above-mentioned structure is an ordinary compound type automatic door sensor.
This is a configuration that also includes And in this embodiment,
When sensors A and B detect the presence of an object,
The door is opened. By the way, if only the above configuration is used, as in the case of the conventional photoelectric type automatic door sensor, a substance that changes the amount of infrared reflection, such as snow, is used as the automatic door sensor.
When come I enter into the monitoring space of support C, causing a malfunction of the automatic door is opened each time.

Therefore, in this embodiment, in addition to the above configuration,
From the time when the detection output is obtained by photoelectric sensor A
After a certain period of time, the ultrasonic pulse sensor B
Signal to close the automatic door when the detection output of
The closing signal generating means for outputting are set only. Here, in this embodiment, the above-mentioned closing signal generating means is provided with a delay circuit 14 for delaying and outputting the detection signal of the determination circuit 8 of the photoelectric sensor A.
And the output of the delay circuit 14 and the ultrasonic pulse type sensor.
And an AND circuit 15 for ANDing the output of the object detection circuit 13 of the sub-B .

Hereinafter, the operation of this embodiment will be described. The automatic door sensor C of the present embodiment is disposed above the automatic door D as shown in FIG. 2, and the ultrasonic pulse sensor B has a space near the automatic door D indicated by a in FIG. perform object detection as monitoring space, the sensor a photoelectric method performs object detection space indicated by b in <br/> in FIG outside thereof as a monitoring space. Therefore, for example, when the automatic door sensor C is
When used to detect the body X , first, the object X is detected by the photoelectric sensor A, and then the ultrasonic pulse method
Object X is Rukoto detected by the sensor B.

Even though the object X is detected by the photoelectric sensor A, the ultrasonic pulse sensor B does not operate even if a delay time set in consideration of the moving speed of the object X elapses. When the object X is not detected, in this case, it is possible to determine that the substance has entered the monitoring space B of the photoelectric sensor A by changing the reflection amount of infrared rays such as snow. Therefore, the detection signal of the photoelectric sensor A is delayed and output by the delay circuit 14 for a time corresponding to the delay time, and the detection output of the object detection circuit 13 is not obtained at the time when the delay output is input. In this case, the output of the AND circuit 15 becomes low level, and the automatic door D is immediately closed by this signal. In this way, it is possible to minimize the malfunction that by the material to vary the amount of reflection of infrared radiation, such as snow.

(Embodiment 2) Another embodiment of the present invention is shown in FIG. In this embodiment, the embodiment
In addition to the configuration of FIG.
After a certain period of time has passed since the intellectual output was obtained,
The detection output of wave pulse type sensor B cannot be obtained,
When a signal to close D is output,
Within a certain period of time from when the detection output is obtained by sensor A
Then, the detection output of the ultrasonic pulse type sensor B was obtained.
An opening / closing determination circuit 16 is provided as opening / closing determination means for outputting a signal for opening the automatic door D only at the time .

The operation of this embodiment will be described below. As in the case of the first embodiment , the opening / closing determination circuit 16 performs the ultrasonic pulse type sensor B even after a certain time has passed after the detection signal is output from the determination circuit 8 of the photoelectric type sensor A. Object inspection
When the detection signal is not output from the knowledge circuit 13, a signal to close the automatic door D is output immediately . Then, after that as long as the output of the AND circuit 15 is not obtained, it operates to not open the automatic door D. Thus, in the present embodiment , once the malfunction occurs due to the substance that changes the reflection amount of infrared rays such as snow, the automatic door D is opened only when both the outputs of the sensors A and B are obtained, thereby causing the malfunction . I try to prevent it. By doing so, the number of times the automatic door D is opened due to snow or the like can be reduced.

In the above case, there is no problem in a situation where snow or the like continuously enters the monitoring space, but it becomes a problem when such a situation is intermittent and rare . That is,
Automatic door D is opened by both outputs of sensors A and B.
This is an automatic door sensor that takes into account
If it, so that its responsiveness is scraped off. So, immediately
In order to ensure responsiveness, light should be
From the time when the detection output is obtained by the electric sensor A
Within a fixed time, the detection output of the ultrasonic pulse type sensor B
After outputting the signal to open the automatic door D,
Automatically when object X is detected by either sensor A or B
Provide a function to return to the state of outputting a signal to open the door D
I just need. That is, when the automatic door D is opened once both sensor A, output is obtained both from the B, opening the automatic door D if both sensor A, the output in either B was obtained like
You do it. In this way, snow etc. are continuously monitored.
Automatically when intermittent and infrequent situations enter the visual space
It is possible to prevent the responsiveness of the door sensor C from deteriorating.

[0020]

According to the present invention, as described above, the photoelectric sensor is used.
Even if a certain time has passed from the time when the detection output was obtained by the sensor, if the detection output of the ultrasonic pulse type sensor is not obtained, a closing signal generating means for outputting a signal to close the automatic door is provided. , even if the sensor of the photoelectric type may malfunction due substance for changing the amount of reflection of infrared such as snow, super
The malfunction of the sensor can be canceled by the output of the sound pulse type sensor, and the reflection amount of infrared rays such as snow changes.
It is possible to minimize malfunctions caused by the substances to be made.

Further, the detection and output by the photoelectric type sensor are performed.
After a certain period of time from when the force is obtained,
The automatic door is closed because the detection output of the sensor of the luss type cannot be obtained.
After that, when the signal is output,
Within a certain period of time from when the detection output is obtained,
Automatic only when the detection output of the pulse type sensor is obtained
By providing an open / close determining means for outputting a signal for opening the door, once a malfunction has occurred, the probability of malfunction can be reduced, and the malfunction can be minimized.

Further, the opening / closing determination means is provided with a photoelectric switch once.
Fixed time from the point when the detection output is obtained
Within, the detection output of the ultrasonic pulse type sensor is obtained,
After outputting the signal to open the automatic door,
Outputs an automatic door opening signal when an object is detected
By providing the function of returning to a state where the monitoring state is restored , it is possible to prevent the responsiveness from deteriorating when a substance that changes the amount of reflection of infrared rays, such as snow, rarely enters the monitoring space.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an object detection method according to the first embodiment;

FIG. 3 is a block diagram showing a configuration of another embodiment.

FIG. 4 is a block diagram showing a configuration of a conventional example .

[Explanation of symbols]

A Sensor of photoelectric system B Sensor of ultrasonic pulse system C Automatic door sensor 14 Delay circuit 15 AND circuit 16 Open / close judgment circuit

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ identification code FI G01S 17/88 G01S 17/88 B (58) Investigated field (Int.Cl. ⁶ , DB name) G01S 7/00-17 / 95 G01V 11/00 H01H 35/00

Claims (3)

(57) [Claims] 1. An infrared ray is projected on the floor in advance, and
Receiving the emitted infrared radiation and measuring the amount of infrared reflection from the floor surface.
Detect and store, and use this reflection amount as the reference reflection amount
Automatically detects objects approaching the door compared to the current amount of reflection
The sensor of the photoelectric system that performs and the intermittent transmission of the ultrasonic pulse
Object by continuously receiving the reflected waves from the object.
Ultrasonic pallets that detect the presence of a body or the distance to an object
And a sensor scan method, article in one of the respective sensor
An automatic door sensor for outputting a signal for opening the automatic door when the body is detected, output detected by the sensor of the photoelectric type
After a certain period of time from when the force was obtained, the ultrasonic
When the detection output of the pulse sensor cannot be obtained,
An automatic door sensor comprising a closing signal generating means for outputting a signal for closing a moving door . 2. The detection output by said photoelectric sensor is
After a certain period of time has passed since the
Signal of closing the automatic door because the detection output of the
Signal is output,
Within a certain period of time after the detection output is obtained, the ultrasonic pulse
Automatic door only when the detection output of the
2. The automatic door sensor according to claim 1, further comprising an open / close determination unit that outputs an open signal . 3. The method according to claim 1, further comprising:
Within a certain period of time from when the sensor output is
The detection output of the ultrasonic pulse type sensor is obtained, and the automatic door
After outputting a signal to open the
Outputs a signal to open the automatic door when an object is detected
The automatic door sensor according to claim 2, further comprising a function of returning to an initial state .