JPH07119542B2 - 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. 13) 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 the floor with 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.
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. 7 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. 10 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 opening signal output circuit, 31B is a detection area B entry determination circuit, and 32B is a door opening signal output circuit.

In this configuration, as shown in FIG. 8, 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 a, generates a human body detection signal X, and outputs a door open signal output circuit to which the human body detection signal X is input. 32A outputs the door open signal SA to the door opening / closing drive device
Send to DRIVE. As a result, the automatic door 20 starts to open. Human body a passes through the open automatic door 20 and detection area B
When the vehicle enters, the detection area B entry determination circuit 31B of the detection device 30B detects the human body a, and the door open signal output circuit 32B sends a door open signal SB. The same applies when a person a passes through the automatic door 20 from the detection area B. Door opening / closing drive DRIV
E drives the automatic door 20 to close when a predetermined time has passed 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.

In order to solve this problem, the present inventors divided the detection area, for example, the detection area A into three in the door opening / closing direction as shown in FIG. When he entered, he devised a system to judge that this person is not facing the door and prevent unnecessary opening / closing operation of the door.

That is, in this system, when the first entry position of a person who enters the detection area from the non-detection area is substantially the left end detection area A1 or the right end detection area A3, this person heads to the automatic door 20. The door open signal is prohibited from being sent until it is determined that the person passes through the front of the automatic door 20 and not the person, and the person exits the non-detection area.

If the first entry position of a person who has entered the detection area from the non-detection area is substantially the central small detection area A2, it is determined that this person is a person who is willing to move toward the automatic door 20. Door open signal SA is transmitted.

However, in this system, the person a automatically doors the detection area A diagonally as shown in FIG. 6 (a).
In the case of heading toward 20 or as shown in FIG. 6 (b), when entering the left end detection area A1 or the right end detection area A3 and suddenly turning in the central detection area A2 toward the automatic door 20, Since the output prohibition of the open signal SA is not released, there is a problem that this person a cannot pass through the automatic door 20.

The present invention has been made to solve the above problems, and prohibits an unnecessary opening / closing operation of a door that occurs when a person simply crosses in front of an automatic door, which is inconvenient for a person who wants to pass through the door. It is an object of the present invention to provide a door opening / closing control device that can reduce the air conditioning loss without giving the above.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is that a person who simply crosses in front of a door is a person who takes a route away from the door and tries to pass through the door from the non-front side of the door (from the side of the door) to the door. Considering that there are many cases where a person heading for a door approaches a door by taking a route close to the door, the detection area is divided into two stages, a near door detection area near the door and a far door detection area. When at least three small detection areas are divided in the opening / closing direction, and the first entry position of the human body into the detection area is substantially the left end detection area or the right end detection area of the divided small detection areas. Is configured to mask the entire far door detection area and prohibit the transmission of the door open signal until the human body leaves the non-detection area.

[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 from the far door detection area to the non-detection area.

If the first entry position of a person who entered the detection area from the non-detection area is the near-door detection area or the small detection area in the center, it is determined that this person is willing to move toward the door and the door is opened. The signal is sent out.

〔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 two stages, front and rear, with a detection area AB near the automatic door 20 (near door detection area) AB and a detection area on the side farther than the automatic door 20 (far door detection area) AA. The area AA is further 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 to 4 of the light emitting and receiving device 10 shown in FIG.
The detection area created by the light receiving elements 1A to 4A is referred to as a detection area AA. Further, the detection area formed by the light projecting element 5 and the light receiving element 5A is the left end detection area A1, the light projecting elements 6, 7 and the light receiving element 6A,
The detection area formed by 7A is the central detection area A2, and the detection area formed by the light projecting element 8 and the light receiving element 8A is the right end detection area A3.

The digital value MAB obtained by A / D converting the output average value of the group of the light receiving elements 1A to 4A (shown by the light receiving section AB in the figure) is compared with the judgment value KAB by the main control unit (comprising a microcomputer) CPU, When the judgment value KAB is reached, the CPU sends the human body detection signal X. In addition, the CPU outputs the average value of the output of the light receiving element 5A (shown by the light receiving section A1) to the digital value MA1 obtained by A / D conversion and the set of the light receiving elements 6A, 7A (shown by the light receiving section A2 in the figure). A /
Digitized value D2 converted MA2, photodetector 8A (photodetector A3
The digital value MA3 obtained by A / D conversion of the output value of (1) is compared with the judgment values KA1, KA2, KA3, respectively, and when the corresponding judgment values are reached, the human body detection signal X
Is sent. In the figure, a set of light emitting elements 1 to 4 is a light emitting unit.
AB, the light projecting element 5 is shown as a light projecting section A1, the set of light projecting elements 6, 7 is shown as a light projecting section A2, and the light projecting element 8 is shown as a light projecting section A3. The CPU has a program represented by the operation flow shown in FIG.

The light projecting elements of the light projecting units A1, A2, and A3 are high-speed in a predetermined order,
In addition, the lighting control is cyclically performed, and the outputs of the corresponding light receiving elements of the light receiving sections A1, A2, and A3 are sampled in synchronization with this lighting control, and the amplification section AMP and the noise removal filter section BPF (band pass. Filter),
Digitally converted and taken into CPU. Similarly, each of the light projecting elements of the light projecting unit AB is also controlled to light up cyclically at a high speed in a predetermined order, and the light receiving unit AB is synchronized with this lighting control.
The output of the corresponding light receiving element of is sampled, and the amplifier section AMP and the noise removal filter section BPF (band pass
After passing through the filter), it is 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. POWER is the power supply 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 has entered the detection area AA (detection areas A1 to A3) and the detection area AB.

I] Now, as shown in FIG. 4 (a), a person a enters the left end detection area A1 of the detection area AA 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
Since the output value MA1 of the light receiving part A1 consisting of 5A reaches the judgment value KA1, the CPU sets the detection area A1 flag (step), and no person is advancing to the central detection area A2, so the door open signal SA is not output. . Then, the detection area AA flag is turned on, so proceed from step to MODE = 4
Switch to.

This MODE = 4 is a person who does not go to the automatic door 20 when a person first substantially enters only the left end detection area A1 of the detection areas AA or only the right end detection area A3. In this mode, the output of the door open signal SA is prohibited, in other words, the entire detection area AA is masked until a person exits the detection area AA 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 value MA1 of the light receiving unit A1 deviates from the determination value KA1, and the output average value MA2 of the light receiving unit A2 including the light receiving elements 6A and 7A.
Reaches the determination 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 20 remains closed. Then, the process proceeds from step to MODE = 4 is held.

(C) When this person a further enters the right end detection area A3,
The output average value MA2 of the light receiving section A2 deviates from the judgment value KA2, and instead the output value MA3 of the light receiving section A3 composed of the light receiving element 8A reaches the judgment value KA3, so the central detection area A2 flag is reset and the right detection area. Although the A3 flag is set (step), 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 becomes 0 (step) and 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 a person a enters the central detection area A2 from the front side of the automatic door 20 as shown in FIG. 4 (b), the output average value MA2 of the light receiving unit A2 reaches the determination value KA2. Area A2 flag is set. Since the person a first entered the central detection area A2 of the detection area AA, the mode is MODE = 4.
Therefore, the CPU drives the door open signal output section OUT to generate the door open signal SA.
As a result, the door opening / closing drive DRIVE operates to open the automatic door 20 and switches to MODE = 1 (step).

This MODE = 1 means that when a person enters the central detection area A2 not later than the left edge detection area A1 or the right edge detection area A3, that is, when the person first enters the central detection area A2, this person automatically Determined to be the person who goes to the door 20,
In this mode, the door open signal SA is continuously transmitted.

(E) When the person a advances from the central detection area A2 to the near door detection area AB, the output average value MA2 of the light receiving unit A2 deviates from the determination value KA2, and the output average value MAB of the light receiving unit AB reaches the determination value KAB. Then, the detection area A2 flag is reset (detection area AA flag reset), but the detection flag AB is set and the door open signal SA is unconditionally transmitted (step).
Then, the mode is switched to 1. (Step ~).

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 ~).

(F) As shown in FIG. 4 (c), when a person a enters the left end detection area (or the right end detection area) from the non-detection area and then enters the detection area AB from the central detection area A2, the detection is performed. As I left area AA, the mode was switched from MODE = 4 to MODE = 1 as described above.
The mask of the detection area AA is released, and the detection area AB flag is set by entering the detection area AB, and the door open signal SA is unconditionally output (step).

IV] A case where the person a directly enters the detection area AB will be described.

As shown in FIG. 4 (d), when the person a directly enters the detection area AB, the output average value MAB of the light receiving section AB reaches the judgment value KAB, so that the CPU sets the detection area AB flag and detects the human body detection signal. Since X is sent, the door open signal output unit OUT unconditionally sends the door open signal SA to the door opening / closing drive device DRIVE,
The automatic door 20 starts the opening operation. The step proceeds from to and switches to MODE = 1.

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 ~).

That is, this detection area AB unconditionally outputs the door open signal SA to open the door when a person enters the detection area AB no matter what route is taken.

Thus, 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, it is determined that this person is a person who simply crosses the front of the door, and the person is detected. The door open signal output is prohibited until you leave the area to the non-detection area, and if you directly enter the detection area AB near the automatic door 20 or enter the detection area AB from the detection area AA, this person is 100% automatic. The automatic door 20 is opened by determining that the person is going to the door 20.

As mentioned above, a person who simply crosses in front of the door is a person who takes a route away from the door and tries to pass through the door, and a person who goes to the door from the non-front side (from the side of the door) is the door. Since there are many cases where the route is taken close to the door, in this embodiment, unnecessary opening / closing operation of the automatic door 20 is reduced, and the automatic door 20
A person trying to pass through the automatic door 20 is prevented from standing in front of the door without coming to the side of the automatic door 20 and preventing the situation as described in FIGS. 6 (a) and 6 (b). do it,
It can be safely passed.

In the above embodiment, the light receiving elements 1A to 8A of the light emitting and receiving device 10 are used.
The output of is divided into detection area AB, left end detection area A1,
Although the central detection area A2 and the right end detection area A3 are formed, the method of dividing the detection areas is not limited to this.

Further, in the above embodiment, the detection device 30A including the CPU is used to detect the human body by software, but it goes without saying that a detection device for detecting the human body by hardware may be used.

〔The invention's effect〕

As described above, according to the present invention, the detection area is divided into two stages, the near door detection area and the far door detection area, and the far door detection area is divided into at least three in the door opening / closing direction. If a person enters the far door detection area, the person will unconditionally generate a door open signal if the person enters the far door detection area. The output of the door open signal is prohibited until the user exits, so that the person who simply crosses the front of the door without going to the door will not open the door and the person who has proceeded from the front of the door. In addition to opening the door, it opens even for people coming from the side or diagonal of the door to pass through the door, so unnecessary opening and closing of the door can be performed without inconvenience to those who try to pass through the door. Air conditioning loss can be reduced by reducing the air conditioning loss.

[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, and FIGS. 4 (a) to 4 (d) are diagrams showing the relationship between a person and a detection area for explaining the operation of the above embodiment, and FIG. FIG. 6 is a schematic diagram for explaining the detection area of the door opening / closing control device proposed by the present inventors, and FIGS. 6A and 6B are for explaining the problems of the door opening / closing control device of FIG. Showing the relationship between the person and the detection area, FIG. 7 is a schematic diagram for explaining the detection area of the conventional door opening / closing control device, and FIGS. 8 and 9 are operations of the door opening / closing control device of FIG. And FIG. 10 is a diagram showing a relationship between a person and a detection area for explaining problems, FIG. 10 is a functional block diagram of the conventional door opening / closing control device, and FIG. 11 is a block diagram showing an example of the conventional detection device. 12 (a) and 12 (b) are views for explaining the detection area forming method, and FIG. 13 is the conventional door opening / closing control device. Of the light emitting and receiving devices that are used 1
It is a figure which shows an example. 10 ... Emitter / receiver, 20 ... Automatic door, 30A ... Detector, CPU ... Main control unit, AA, AB ... Detection area, A1 ... Left edge detection area, A2 ... Center detection area, A3 ... … Right edge detection area.

Claims (2)

[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 two stages, a near door detection area near the door and a far door detection area, and the far door detection area is divided into at least three small detection areas in the door opening / closing direction.
When the first approach position of the human body to the detection area is substantially the left end detection area or the right end detection area of the divided small detection areas, the above-mentioned until the human body exits to the non-detection area. A door opening / closing control device which masks the entire far door detection area and prohibits sending of the door open signal. 2. The door opening / closing control device according to claim 1, wherein a door opening signal is unconditionally transmitted when a human body enters the near door detection area.