JPH01109287A - Automatic door opening and closing device - Google Patents

Abstract

PURPOSE:To reduce the cost of the title device by gathering and arranging projecting and photodetecting elements, and performing full/half opening control by using a human body detecting device. CONSTITUTION:An A/D converter 25 converts the maximum level value VLMAX of the pulse of a photodetection signal V1 into a digital value. A CPU 21 averages digital values of values VLMAX of (n) pulses to calculate a mean photodetection quantity N11. When the photodetection quantity N11 is other than a criterion, disturbance such as the sunshine is removed to calculate a mean photodetection quantity N12 and when the photodetection quantity N12 is still not the criterion, the mean photodetection quantity N13 of successive 2n pieces is calculated. Here, when the photodetection quantities N12 and N13 are approximate, it is judged that a human body enters a detection area and a human body detection signal XM is generated. This signal XM is outputted as a half-open signal to a relay 32A through an interface circuit 24. Consequently, an on timer 31 outputs a half-opening command signal YM to a door opening/ closing driving device 33. The CPU 21 further scans the outputs of photodetecting elements 1A-8A and sends out a full-open signal YF to a relay 32B through the circuit 24 when there are two detection areas and they are separated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic door opening/closing device that detects when a human body approaches or moves away from a door and automatically opens/closes the door.

[Conventional technology]

Some automatic door opening/closing devices are capable of fully opening and half-opening the door. FIG. 10 shows the configuration of a conventional automatic door opening/closing device of this type. 82L and 82R are the left and right doors of the door 81, and 83 is the sensor part of the human body detection device, and the center It consists of a mud switch 84, and a left mud switch 85L and a right mud switch 85R adjacent to the left and right sides of the central mud switch 84 with a predetermined gap therebetween. 86 is a detection control device, which introduces detection signals from the central mud switch 84, left mud switch 85L, and right mud switch 85R through respective lead wires.

In this configuration, the three mud switches 84.
If the number of people entering the detection area formed by 85L and 85R at one time is small and only the central mud switch 84 is stepped on, the detection control device 86 receives the detection signal from the central mud switch 84 and opens the door ajar. A command signal is sent to the door opening/closing drive device 87. In addition, if the number of people entering the detection area at a time is large and the left mud switch 85L or right mud switch 85R is stepped on, the detection control device 86 sends a door fully open command signal to the door opening/closing drive device 87.
Send to.

[Problem that the invention seeks to solve]

As described above, the method in which the detection areas are formed using mud switches has a problem in that it is expensive because a plurality of mud switches are required to divide the detection areas. In addition, when forming a detection area using a conventional human body detection device that uses a light emitting/receiving device as a sensor part, one human body detection device is required for each of the center, left and right detection areas, and three human body detection devices are required. The human body detection device had to be installed in the blind area above the door, which caused a problem of detracting from the aesthetics.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an automatic door opening/closing device that can control the door to be fully opened or half-opened using one human body detection device.

[Means for solving problems]

In order to achieve the above object, the present invention has a sensor section of a human body detection device that includes a light emitting element row of light emitting elements arranged in series laterally;
It consists of a light-receiving element row that is arranged in series in the same line as the light-emitting element row and defines an independent detection area in front of the door in correspondence with each of the light-emitting elements, and detects and controls the light-emitting element and the corresponding light-receiving element. operated synchronously and periodically by the device, and the detection control device compares the amount of received light taken in with a criterion initially set for each of the detection areas,
When the amount of received light is outside the determination criteria, either a door full open command or a door half open command is sent to the door opening/closing drive device, depending on the number of light receiving elements that sent out the received light amount and the degree of adjacency/separation between them. It is structured as follows.

[Effect]

With this invention, the number of people advancing toward the door is large;
Of course, if the door spreads out and enters all of the detection areas lined up horizontally, but also if the number of people is small, but they enter separate detection areas that are far apart, the door can be fully opened, and conversely, the door can be opened fully. If the number of entry detection areas is small and there is only one detection area, or if the detection area straddles adjacent detection areas, it is possible to move towards the door (for example, by leaving the door half open).
The door can be opened fully or half-open depending on a number of entry patterns depending on the number of people entering and the combination of entry positions.

〔Example〕

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

In FIG. 1, A is a light emitter, B is a light receiver, IO is a light emitter selector switch, 11 is a light receiver selector switch, and 12 is a light receiver.
1 is a light receiving signal amplifier, and 13 is a sample and hold circuit, which constitute a light emitting/receiving device 14 of a human body detection device 15.

20 is a detection control device, which includes a microcomputer (
CPU) 21, program memory (ROM) 22,
Data memory (RAM) 23, interface circuit (
It has a detection control section consisting of PIO) 24 and an A/D conversion section 25. The program memory 22 includes a reference value setting program shown in FIG. 5 and a detection program shown in FIG.
In addition to storing the full/half-open determination program shown in FIG. 7, it also stores an element switching program. 31 is on timer, 32A
and B are a half-open output relay and a full-open output relay, 33 is a door opening/closing drive device, and 33A is a door opening/closing drive device 3.
The control section 3, 33B, is a drive section of the door opening/closing drive device 33. When the control unit 33A receives a half-open command signal YIl and a fully open command signal YF, which will be described later, as shown in FIG. 9, the drive unit 33B sends an open signal Zo until it receives a door half-open position signal and a door fully open position signal. do. Further, the closing signal Zc is sent out from a predetermined time period (set by an open timer not shown) after the human body passes through the door until the drive unit 33B outputs the door fully closed position signal.

As shown in FIG. 2, the light projecting section A includes a plurality of light projecting elements 1 to 8 arranged in two horizontal rows on the back of a light projecting lens 9.
The light emitting elements 1 to 8 have their optical axes aligned with the floor F in front of the door dOOr.
The floor surface is irradiated with infrared rays R, and as shown in FIG. . The group of light emitting elements 5 to 8 constituting the second light emitting element row is located in the door side half of the irradiation area C (
Light projecting elements 1 to 4 constituting the first example of light projecting elements share the first half of the irradiation area C (referred to as the first half of the irradiation area). The light receiving section B is as shown in FIG.
A plurality of light receiving elements IA to 8A are arranged on the back of the light receiving lens 9A in two horizontal rows with their respective optical axes facing the center of the segmented irradiation area Cl-Cl, and each light receiving element 1
Detection areas Sl to Ss shown with diagonal lines in FIGS. 3(a) and 3(b) in the irradiation space by 8.
Sq is not shown). This detection area S1
~S, has reached the floor.

The light projecting elements 1 to 8 receive a drive signal (for example, 3.5 KHz) via the light projecting element changeover switch 10, and repeatedly emit infrared rays R having a pulse waveform as shown in FIG. 4(a). The light receiving signals VL (shown in the ridges in FIG. 4) sent out by the light receiving elements IA to 8A are taken out through the light receiving element changeover switch 11, amplified by the amplifier 12, and then input to the sample and hold circuit B13. The light emitting element changeover switch 10 receives the switching signal Sw and sends a drive signal P to the light emitting elements 1 to 8.
The light-receiving element selector switch 11 receives the switching signal Sw and synchronizes the light-receiving elements IA to 8A with the above-mentioned switching of the light emitting elements 1 to 8, respectively. Switch and connect. The sample and hold circuit 13 receives the sample and hold signal S/H, samples and holds the maximum level vL□8 of the incoming light reception signal (pulse signal) VL. The A/D converter 25 converts the hold value vL of the sample hold circuit 13
□8 is converted into a digital value and input to the CPU 21.

Note that the drive signal P, switching signal Sw, and sample hold signal S/H are sent out from the CPU 21 by turning on a power switch (not shown), and are sent to the interface circuit 2.
4 to the light emitting/receiving device 14.

Next, the operation of this device will be explained.

When the power switch is turned on, the detection control device 20
The PU 21 is activated and starts sending a switching signal Sw serving as an operation command to the light projecting section A and the light receiving section B.

As a result, the light emitting elements 1 to 8 are sequentially switched at predetermined time intervals to emit infrared rays R, and the light receiving elements IA to 8A and the respective light emitting elements 1 to 8 operate synchronously to detect areas S1 to S1.
It receives reflected light RL from S, and sequentially sends out a received light signal vL at a level proportional to the amount of reflected light. Hereinafter, for convenience of explanation, a description will be given of the detection area 31 set by the combination of the light projecting element 1 and the light receiving element LA that are driven in synchronization.

■Reference value setting operation (refer to the reference value setting program) At the same time as the power is turned on, execution of the above reference value setting program is automatically started. This program is executed in an environment where no humans are present in the detection area S. A/D converter 25
is the maximum level value V of the first pulse, second pulse, . . .
LMAX is converted into a digital value and sent to the CPU 21. When the maximum level value VL of the n-th pulse is digitally converted, the CPU 21 calculates the average value N1 of the n digital values, D@g, . . . D6m, and calculates the average value N0. ．． is the reference value of the detection area S, and threshold values σ1 and σ- are set above and below it, and 1 (N, , -σ
, ≦, 1≦N, +σ,) and store the data in the data memory 23.
is stored in the detection area sI address. This reference value setting routine is similarly executed for the detection areas S2 to S, and - is set to each criterion from 8 to S.

(2) Detection Operation (Refer to Detection Program) After the reference value setting operation is completed, the detection program shown in FIG. 6 is sequentially executed for the detection areas S, -S-. The detection area S will be explained below.

As in the reference value setting operation, the A/D converter 25 performs the following operations.
The maximum level value V LNAII of the pulse of the light reception signal vL is converted into a digital value, and when the maximum level value of n (n - 4) pulses is digitally converted, the CPU 21 converts the maximum level value of the pulse of n (n - 4) into a digital value.
n = 4) digital value D ll5D 12%
... Do is averaged to obtain the average received light amount N1. is calculated, and it is determined whether the average received light amount Nll is outside the criterion Kl. If it is within the 0 criterion, the relays 32A,
B is deenergized and the door opening/closing command signal Y (half-open command signal YHs
On the condition that the full open command signal YF) has disappeared,
The above average received light amount calculation operation is repeated.

If the average amount of received light Nll is used as a judgment criterion and it is outside, the same method as above is used to check whether the average amount of received light 11N11 is affected by disturbances such as sunlight or momentary flying objects. The detection routine is repeated, that is, the CPU 21 averages the digital values for the next <2n (n-4) pulses to obtain the average received light amount NI! Calculate. In this case, abnormally large or small digital values are excluded as being caused by the above-mentioned disturbance or alternating current component, and the remaining digital values are averaged. If it is still outside the criteria of 2, the third detection routine is repeated to confirm whether or not it is affected by ambient light. The average received light amount is 1'J by averaging the digital values for <2n (n-4) pulses.
Calculate ts. In this case as well, abnormally large or small digital values are excluded, and the remaining digital values are averaged. The CPU 21 sets this average amount of received light N13 to a second value.
Average received light amount NI obtained in the first detection routine! If the two match or are similar, it is determined that a human has entered the detection area S, and the human body detection signal
M is created and the full/half-open judgment operation described below is performed.

■Full-half-open judgment operation (refer to the full-half-open judgment program) This human body detection signal XM is sent to the relay 32A through the interface circuit 24 as a half-open signal. This results in
As shown in FIG. 9, a half-open command signal YH is sent from the on-timer 31 to the door opening/closing drive device 33. The CPU 21 creates the above-mentioned half-open signal XN, and simultaneously generates the light receiving elements IA to
Scan the output of 8A, and from the scan results, determine the number of detection areas where a human body has entered (i.e., the number of light receiving elements whose received light amount exceeds the criteria set for each detection area) and their positive values. Check, convert into data and store in data memory 2
If there are two or more detection areas where a human body has entered and these detection areas are audible (for example, if the detection area is detected as shown in Fig. 8(b)) As shown, in the case of the entry mode in which the detection areas into which the human body M is entering are S, 84, and S, the full open signal XF is sent to the relay 32B through the interface circuit 24.
Send to. In addition, there are two detection areas where a human body has entered.
However, if these detection areas are separated (for example, in the case of an entry pattern where the detection areas into which the human body M has entered are SL and 84, as shown in FIG. 8(a)), Similarly to the above case, the CPU 21 sends the full open signal X to the relay (full open output relay) 32B through the interface circuit 24. Furthermore, if there are three or more detection areas in which a human body has entered in a plane, as shown in FIG. (In case of approach pattern)
Also, the CPU 21 outputs the full open signal X.

is sent to relay 32B through interface circuit 24. As shown in Fig. 8(C) and ld), there are two detection areas, but if there are two or less detection areas,
Fully open command signal YF is not generated. In addition, relay 32B
When receiving the full open signal XF, it sends a full open command signal Y to the door opening/closing drive device 33 via the on-timer 31.

Therefore, according to this embodiment, when there are many people advancing toward the door, for example, when they enter across the detection areas SI to S4, it is of course possible to use the detection areas SI to S4 as shown in FIG. 8(a) and FIG. As shown in Figure 2, although the number of people is small, there are two detection areas SL and 8 that are far apart.
4 or the boundary between S4 and S and S! Even if the door is fully opened and the number of people is small (if there is only one detection area (see Figure 8)),
As shown in C) and (d), when straddling the adjacent detection areas S2 and 83 and Sh and S, the door is left half open.

In this example, a large number of light emitting elements and light receiving elements are used.
The light emitting elements 1 to 8 are made to correspond to the light receiving elements IA to 8A in a 1:1 ratio to sequentially and periodically define detection areas 5t-3s,
Since judgment criteria are set for each detection area S, ~S, the detection area can be clearly defined, and the area into which the human body enters can be distinguished from other objects and detected with high accuracy. Therefore, by using one human body detection device, it is possible to satisfactorily perform full/half-open control according to various patterns of human entrance into the detection area.

In this embodiment, the light projecting element and the light receiving element are arranged in two stages, but the same effect can be obtained even if the light projecting element and the light receiving element are arranged in one stage.

In addition, in this embodiment, since the operation control and signal processing of the plurality of light emitting elements 1 to 8 and the plurality of light receiving elements IA to 8A are performed using one microcomputer 21, the configuration of the apparatus is simplified. This has the advantage that the entire device becomes compact.

〔Effect of the invention〕

As explained above, this invention can control a door to be fully opened by using a human body detection device that can be made compact by arranging a plurality of light emitting elements and a plurality of light receiving elements together. Compared to the conventional method, it has the advantage of being able to reduce costs and improve aesthetic appearance.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the arrangement structure of a light emitting element and a light receiving element, Fig. 3 +al
and...) are diagrams showing the detection area, Figure 4 (a) is an output waveform diagram of the light emitting element in the above embodiment, Figure 4 (bl is an output waveform diagram of the light receiving element in the above embodiment, and Figure 5 is A flowchart of the reference value setting program in the above embodiment, FIG. 6 is a flowchart of the detection program in the above embodiment, and FIG. 7 is a flowchart of the fully half-open judgment program in the above embodiment.
FIG. 8 is a diagram showing a pattern of a human body entering the detection area to explain the operation by the full/half open determination program, FIG. 9 is an output waveform diagram of equipment downstream from the interface circuit in the above embodiment, and FIG. The figure is a configuration diagram of a conventional automatic door opening/closing device. 1 to 8--light emitting element, IA to 8A...-light receiving element, 10
- Light emitting element changeover switch, 11 - Light receiving element changeover switch, 20 - Detection control device, 21 - CPU.

Claims (1)

[Claims] (1) A light emitting element row of light emitting elements arranged horizontally in series, and a light receiving element row arranged in series in the same row as the light emitting element row and defining an independent detection area in front of the door in correspondence with each of the light emitting elements. and a human body detection device comprising a detection control device that operates the light emitting element and the corresponding light receiving element synchronously and periodically and captures the amount of light received by the light receiving element to determine the presence or absence of a human body, and the detection It has a door opening/closing drive device that opens and closes the door based on commands from the control device, and the detection control device compares the amount of received light taken in with the criteria initially set for each of the detection areas, and determines the amount of light received. When the amount of received light is outside the judgment criteria, either a door full open command or a door half open command is sent to the door opening/closing drive device, depending on the number of light receiving elements that sent out the received light amount and the degree of adjacency/separation between them. An automatic door opening/closing device that is characterized by: