JPH07119541B2 - Door opening / closing control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a door opening / closing control device that detects that a human body or the like approaches or leaves a door to automatically open and close the door.

[Conventional technology]

This type of door opening / closing control device forms a detection area for detecting the presence or absence of a human body, etc. in front of and behind the door, judges the entry / exit of the human body etc. into / from this detection area, and controls the opening / closing of the door. A detection device for sending a signal for

This type of detecting device has, for example, a light emitting and receiving device as disclosed in Japanese Patent Laid-Open No. 1-99884. The light projecting / receiving device 10 (FIG. 12) disclosed herein is a light projecting element 1 arranged on the back of a light projecting lens 9 in two rows in the door opening / closing direction.
8 to 8 and a light receiving portion 9B formed of two light receiving elements 1A to 8A arranged in two rows in the door opening / closing direction on the back of the light receiving lens 9A. By irradiating the floor with the optical axis toward the floor in front of the door and irradiating infrared rays,
An irradiation area C composed of divided irradiation areas C1 to C8 as shown in the figure is formed, and the light-receiving elements 1A to 8A direct their optical axes toward the centers of the corresponding divided irradiation areas C1 to C8, respectively. In the irradiation space by 8, as shown in FIGS. 11 (a) and (b),
The detection areas S1 to S8 indicated by diagonal lines are formed, and the detection area S is formed as a whole. Each of the light emitting elements 1 to 8 is sequentially and cyclically at high speed by the light emitting element changeover switch SW-A.
The light emission is switched and controlled, and the output (analog output) of the light receiving element corresponding to the light emitting element that is emitting light is sequentially taken out by the light receiving element changeover switch SW-B, and noise is removed by the filter, and then the digital signal is output. Converted to a value, and the digital average value is the control unit (comprising a microcomputer)
When the digital average value of the outputs is at the human body level, the door open signal is sent to the door opening / closing drive device (door engine controller) to open the door.

FIG. 6 is a schematic diagram for explaining a conventional example of a door opening / closing control device using this detection device. In the figure, 20 is an automatic door which is controlled to be opened and closed by a door opening / closing drive DRIVE. 30A and 30B are the above-mentioned detection devices, which are arranged on both sides of, for example, a ceiling automatic door 20 of a building entrance / exit, and the above-mentioned light emitting / receiving device of the detection device 30A detects at the front of the automatic door 20. The area A is formed, and the above-mentioned light emitting / receiving device of the detection device 30B forms the detection area B at the rear part of the automatic door 20.

FIG. 9 is a functional block diagram showing a conventional operation of an example of a conventional door opening / closing control device, 31A is a detection area A of the detection device 30A.
An entry determination circuit, 32A is a door open signal output circuit, 31B is a detection area B entry determination circuit, and 32A is a door open signal output circuit.

In this configuration, as shown in FIG. 7, the human body a now enters from the detection area A and the automatic door is opened as indicated by the solid arrow.
20 → Pass through detection area B.

When the human body a enters the detection area A, the detection area A entry determination circuit 31A of the detection device 30A detects the human body, generates the human body detection signal X, and outputs the door opening signal output circuit 32A to which the human body detection signal X is input. Outputs the door open signal SA to the door opening / closing drive device DR
Send to IVE. As a result, the automatic door 20 starts to open.
When the human body a passes through the opened automatic door 20 and enters the detection area B, the detection area B entry determination circuit 3 of the detection device 30B.
1B detects the human body a, and the door open signal output circuit 32B sends a door open signal SB. Person a moves from detection area B to automatic door 20
The same applies when passing through. The door opening / closing drive device DRIVE closes the automatic door 20 when the processing time elapses after the door open signals SA and SB disappear.

[Problems to be Solved by the Invention]

As described above, when the human body enters the detection areas A and B in the conventional detection devices 30A and 30B, the human body detection signal X is generated and the door open signal is transmitted, so that the human body does not face the automatic door 20 and As shown in the figure, even when the human body a simply crosses the detection area A, the automatic door 20 is opened, resulting in air conditioning loss.
There is a problem that it gives people indoors an unpleasant feeling.

The present invention has been made to solve the above problems, prohibits unnecessary operation of the door that occurs when a person simply crosses in front of the automatic door, and eliminates discomfort due to useless operation of the door,
It is an object of the present invention to provide a door opening / closing control device that can reduce air conditioning loss.

[Means for Solving the Problems]

In order to achieve the above object, the present invention divides the detection area into at least three small detection areas in the door opening / closing direction, and detects the left end of the small detection areas in which the first entry position of the human body into the detection area is divided. If the area or right edge detection area, until the human body exits the non-detection area,
The configuration is such that the door open signal output is prohibited.

[Action]

In the present invention, when the first entry position of the person who has entered the detection area from the non-detection area is the left end detection area or the right end detection area, this person is not a person who is heading for the door,
The door open signal is prohibited from being sent until it is determined that the person is passing across the front of the door and the person exits the non-detection area.

If the first entry position of the person who entered the detection area from the non-detection area is the small detection area in the center, it is determined that this person is a person who is willing to go to the door, and the door open signal is sent. It

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the detection area A of the detection device 30A is the second
As shown in the figure, it is divided into three detection areas, that is, a central detection area A2, a left end detection area A1 and a right end detection area A3.

In this embodiment, the light emitting elements 1, 5 of the light emitting and receiving device 10 shown in FIG.
The detection area created by the light receiving elements 1A and 5A is the leftmost detection area A.
1. The detection area created by the light emitting elements 2, 3, 6, 7 and the light receiving elements 2A, 3A, 6A and 7A is the central detection area A2, and the detection area created by the light emitting elements 4, 8 and the light receiving elements 4A, 8A is The right end detection area A3, and the digital value MA1 obtained by A / D conversion of the output average value of the set of light receiving elements 1A and 5A (shown by the light receiving section A1 in the figure) and the set of light receiving elements 2A, 3A, 6A and 7A (in the figure Digital value MA2 obtained by A / D conversion of the average output value of the light receiving part A2), light receiving element 4
Digitized value MA3 obtained by A / D converting the output average value of A, 8A (shown by light receiving unit A3 in the figure) is compared with judgment values KA1, KA2, KA3 in the main control unit (comprising a microcomputer) CPU, respectively. When the corresponding judgment value is reached, the human body detection signal X is transmitted under a certain condition. In the figure, a set of light projecting elements 1 and 5 is shown as a light projecting section A1, a set of light projecting elements 2, 3, 6, and 7 is shown as a light projecting section A2, and a set of light projecting elements 4 and 8 is shown as a light projecting section A3. ing. The CPU has a program represented by the operation flow shown in FIG.

The light projecting elements of the light projecting sections A1, A2, and A3 are cyclically controlled at high speed in a predetermined order, and the output of the corresponding light receiving elements of the light receiving sections A1, A2, and A3 is synchronized with this lighting control. Is sampled, passed through an amplification section AMP and a noise removal filter section BPF (band pass filter), then digitally converted and taken into the CPU. SWICH is a light receiving section selecting section that samples and extracts the outputs of the light receiving elements 1A to 8A, and OUT is a door opening signal output section that receives a human body detection signal X from the CPU and sends a door opening signal SA. SA turns OFF after the human body detection signal X disappears. POWE
R is a power supply unit of the detection device 30A.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to the operation flow shown in FIG.

When the power switch (not shown) is turned on, the CPU is initialized, and the mode setting section (not shown) of the CPU displays MODE =
0 is set.

This MODE = 0 is a mode in which no person is entering the detection area A (detection areas A1 to A3).

I] Now, as shown by the solid line in FIG. 5, the person a enters the left end detection area A1 of the detection area A from the non-detection area, and the automatic door
Suppose that you crossed detection area A without going to 20.

(A) When a person a enters the left end detection area A1, the light receiving element
The output average value NA1 of the light receiving part A1 consisting of 1A and 5A is the judgment value KA1.
Therefore, the CPU sets the detection area A1 flag (step), and since no person is advancing to the central detection area A2, the door open signal SA is not output (step). In the mode, since the detection area A flag is turned on, the process proceeds to step and switches to MODE = 4.

In this MODE = 4, when a person first enters only the left end detection area A1 of the detection areas A or only the right end detection area A3, it is determined that this person is a person who does not go to the automatic door 20. , Mode that prohibits output of door open signal SA,
In other words, this is a mode in which the entire detection area A is masked until a person exits the detection area A to the non-detection area.

(B) When the person a moves from the left end detection area A1 to the central detection area A2, the output average value NA1 of the light receiving section A1 deviates from the judgment value KA1 and the light receiving section A2 including the light receiving elements 2A, 3A, 6A and 7A.
Output average value MA2 reaches the judgment value KA2, the left end detection area A1 flag is reset, but the central detection area A2
Flag is set. However, since MODE = 4 (step), the door open signal SA is not output and the automatic door 2
0 remains closed. Then proceed from step to M
ODE = 4 is retained. (C) When this person a further enters the right end detection area A3, the output average value MA2 of the light receiving unit A2 deviates from the determination value KA2, and instead, the output average value MA3 of the light receiving unit A3 including the light receiving elements 4A and 8A is changed. Since the judgment value KA3 is reached,
Central detection area A2 flag is reset, right detection area
Although the A3 flag is set, since there is no person in the central detection area A2, the door open signal SA is not output and the automatic door 20 continues to be closed. When the person a exits from the right detection area A3 to the non-detection area, MODE = 0 and the state returns to the initial state.

II] The same is basically true when the person a enters the right end detection area A3 from the non-detection area and exits the non-detection area through the central detection area A2 and the left end detection area A1.

III] A case in which the person a goes from the non-detection area to the automatic door 20 through the central detection area A2 will be described.

(D) When the person a enters the central detection area A2 from the front side of the automatic door 20 as shown in FIG. 4, the output average value MA2 of the light receiving section A2 reaches the judgment value KA2, so the central detection area A2 flag is set. Is set. Since the person a first entered the central detection area A2 of the detection area A, the mode is not MODE = 4 (step), and the CPU drives the door open signal output section OUT to generate the door open signal SA. Let As a result, the door opening / closing drive DRIVE operates to open the automatic door 20, and MODE =
Switch to 1 (step).

This MODE = 1 means that the person entering the central detection area A2 is not later than the entry into the left edge detection area A1 and the right edge detection area A3, and it is determined that this person is the person who is heading to the automatic door 20,
In this mode, the door open signal SA is continuously transmitted.

When the person a passes through the automatic door 20 (when the door open signal SA disappears and a predetermined time elapses), the automatic door 20 starts the closing operation and switches to MODE = 0 (steps ~).

As described above, in the present embodiment, when a person enters the detection area from the left end side or the right end side of the detection area, the door open signal output is prohibited until the person exits the detection area to the non-detection area. Therefore, the automatic door 20 is not opened for a person who simply passes in front of the automatic door 20.
The unnecessary opening / closing operation of the automatic door 20 is reduced.

In the above embodiment, the light receiving elements 1A to 8A of the light emitting and receiving device 10 are used.
However, the method of classifying the small detection area is not limited to this.

Further, in the above embodiment, the detection device 30A is provided and the human body is detected by software. However, it goes without saying that a detection device that detects the human body by hardware may be used.

〔The invention's effect〕

As described above, the present invention divides the detection area formed in front of or behind the door into at least three detection areas in the door opening / closing direction, and when a person enters the detection area at the left end or the right end, this person is not detected. Since the door open signal output is prohibited until the person exits the area, the door will not be opened for those who cross the front of the door without facing the door, and for those who have proceeded from the front of the door. Since the door opens, unnecessary opening / closing operation of the door can be reduced, and air conditioning loss can be reduced as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram for explaining a detection area in the above embodiment,
FIG. 3 is an operation flow chart of the program of the CPU in the above embodiment, FIGS. 4 and 5 are views showing the relationship between a person and a detection area for explaining the operation of the above embodiment, and FIG. And FIG. 7 and FIG. 8 are schematic diagrams for explaining the detection area of the door opening / closing control device, and FIGS. 7 and 8 are diagrams showing the relationship between the person and the detection area for explaining the operation of the conventional door opening / closing control device. FIG. 10 is a functional block diagram of the conventional door opening / closing control device, and FIG. 10 is a block diagram showing an example of a conventional detection device.
11 (a) and 11 (b) are views for explaining the detection area forming method, and FIG. 12 is a view showing an example of the light emitting / receiving device used in the conventional door opening / closing control device. 10 …… Emitter / receiver, 20 …… Automatic door, 30A …… Detector, CPU …… Main control unit, A, …… Detection area, A1 …… Left edge detection area, A2 …… Center detection area, A3 …… Right edge detection area.

Claims (1)

[Claims] 1. A detection device for sending a door open signal to a door opening / closing drive device for opening / closing the door when a human body is detected by forming a detection area for detecting a human body in front of or behind the door. In the door opening / closing control device, the detection area is divided into at least three small detection areas in the door opening / closing direction,
If the first approach position of the human body to the detection area is the left end detection area or the right end detection area of the divided small detection areas, the entire detection area is masked until the human body exits the non-detection area. A door opening / closing control device, which prohibits sending of the door opening signal.