JPH02236187A - Activating switch of automatic door - Google Patents

Abstract

PURPOSE:To open an automatic door only in minimum required time by a method wherein the door is opened quickly or slowly with timing at the time of detecting that an object enters a sensing area off the automatic door depending on whether the object such as a human body moves rapidly or slowly toward an activating switch. CONSTITUTION:An object sensor 1 is provided close to an automatic door D wherein the sensor 1 outputs an electric signal according to entrance of an object to be sensed H into specific sensing areas a1,a2 set in the vicinity of the door D. This sensor 1 sets a plurality sensing areas different in the distance from the door D and speeds in an area identifying unit 5 and a speed identifying unit 6, and a sensing speed setting unit 7 sets a reference speed range of the object to be sensed H for the respective sensing areas 1a,1b faster as the range comes farther from the door D. Then a comparator 8 compares reference speed range data with sensed speed data, and when a signal identifying unit 9 inputs a door activating signal from the comparator 8, a direction of movement of the object H can be detected by the output signal of the identifying unit 5.

Description

[Detailed Description of the Invention] Industrial Application Fields The present invention provides an automatic control system for controlling the opening/closing operation of an automatic door by detecting that an object such as a human body approaches a predetermined area near the automatic door. This relates to a door activation switch/notch device.

<Prior Art> As a starting switch device for controlling the opening and closing of such an automatic door, a rubber mat switch, which is made of two metal plates facing each other with a predetermined gap and entirely coated with waterproof rubber, has been used for a long time. However, this rubber mat switch has various drawbacks because it uses an object contact detection method. To overcome this drawback, a non-contact detection type electronic cloak type object detector has been devised and put into practical use, but in recent years, other non-contact type object detectors that can easily set and change the detection area have been developed. Object detectors tend to be used frequently. These non-contact object detectors include heat-ray (passive infrared) type detectors that utilize fluctuations in radiated infrared light flux based on the temperature difference between the background of the detection area and the moving object, and those that utilize the time difference between transmitted and received waves. An ultrasonic type that uses the Doppler effect, an infrared type that projects infrared rays and detects changes in the amount of light reflected from an object, and a radio wave (radar) type that uses the Doppler effect of microwaves. etc. exist.

Since each start switch device using each of these object detectors has a configuration as shown in FIG. 6, we will now explain the one using the hot wire type object detector 1 as an example. do. In the object detector 1, an infrared beam emitted from a predetermined detection area set by the optical system is focused by the optical system and enters the infrared detecting element of the object detector 1, and the infrared detecting element enters the infrared detecting element. Converts infrared light flux into an electrical signal proportional to its variation and outputs it.
After this electric signal is amplified by the amplifier 2, it is compared with a reference signal of a constant level by the signal level determination section 3, and it is determined whether the electric signal is equal to or higher than the level of this reference signal. That is, the signal level discriminator 3 constantly monitors the signal strength, that is, the amount of variation in the infrared light flux, and outputs a detection signal when it detects a variation exceeding the detection sensitivity set by the reference signal, and this detection signal activates the door activation relay. 4 is turned on, power is supplied to the door operation control section through this on-state relay 4, and the motor is rotated to open the automatic door. <Problems to be Solved by the Invention> By the way, in any of the object detectors of the non-contact detection type described above, the detection area is set in the vicinity of the automatic door as described above, and the detection area is When an object such as a human body enters the area, a detection signal for door activation is output, the door activation relay 4 is turned on, and the automatic door is opened. For example, the automatic door is kept open for a certain period of time, about one second, and then the automatic door is closed. However, once the detection area is set, it does not change, so for example, if a person walks slowly and passes through an automatic door, the detection area will change from the moment the human body enters the detection area until after a certain period of time has elapsed after passing through the detection area. The automatic door remains open for a relatively long period of time until it cools down inside. When air conditioning such as heating is performed, there is a problem of energy loss and external noise entering. Therefore,
The above problem can be considerably alleviated by setting a narrow detection area, but in this case, if a human body tries to pass through the automatic door quickly, even if the human body approaches the automatic door, the automatic door will not be activated. The door will not open fully, and you may have to stop in front of the automatic door.
You could end up colliding with an automatic door.

The present invention has been made in view of such conventional problems, and provides an automatic door that can be controlled to open for the minimum necessary time depending on the moving speed of an object passing through the automatic door. The technical problem is to provide an activation switch device.

Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, an automatic door start switch bag holder is configured as follows. That is, an object detector is installed near the automatic door and outputs an electric signal that fluctuates in response to the entrance of a moving object such as a human body into a predetermined detection area set near the automatic door. In this automatic door start switch device that detects an object by fluctuations in the output electric signal of the object detector and outputs a signal to control opening/closing of the automatic door, the distance from the automatic door is different depending on the object detector. a detection area setting means that sets a plurality of detection areas; a detection speed setting means that sets a reference speed range of an object to be detected for each of the detection areas to be faster as the distance from the automatic door increases; and an output from the object detector. an electrical signal corresponding to the moving speed of the detected object to be detected; and a reference speed range set in the detection speed setting means corresponding to the detection area where the detected object to which this electrical signal is output is present. The present invention is characterized by comprising a comparing means for comparing and outputting an activation signal for the automatic door.

Effect> When an object such as a human body or a car moves toward the automatic door and enters the detection area, the electrical signal output from the object detector fluctuates. This electrical signal corresponds to the moving speed of the object to be detected, and since the detection area setting means can determine the detection area where the object to be detected exists when the electrical signal is output, the reference corresponding to that detection area can be determined. A speed range is set by the detection speed setting means, and the comparison means compares whether the moving speed of the object to be detected based on the output electric signal of the object detector is within the reference speed range. The automatic door activation signal is output in this case.

Here, the reference speed range for detection is set to a faster speed as the distance from the automatic door increases for each detection area, so if the object moves towards the automatic door at a faster speed, the automatic door The automatic door can be opened quickly when the object enters the detection area far from the automatic door and is away from the automatic door. Conversely, if the object is moving at a slow speed toward the automatic door, the automatic door is opened quickly when the object enters the detection area far from the automatic door and is away from the automatic door. Since the automatic door is opened at a leisurely timing upon entry, the automatic door is opened for the minimum amount of time necessary depending on the speed of movement of objects such as people passing through the automatic door, which saves energy during cooling and heating. At the same time, it is possible to prevent noise from entering from the outside as much as possible.

Preferred embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1 showing the block configuration of an embodiment of the present invention, the same or equivalent components as in FIG. 6 are given the same reference numerals. A case in which a sensor is used will be explained. The object detectors 1 are installed on the indoor side and the outdoor side of the automatic door D, respectively, as shown in FIG. the first detection area a which is further away from itself by (not shown)
Two types of detection areas a2 and 1 are set.

Then, the area determination unit 5 determines the distance from the object detector 1 to the detected object H based on the time from when the transmitted wave of the object detector 1 consisting of the ultrasonic Doppler sensor is emitted to when the received wave reflected by the object detector 1 is received. The detection area a1 or a2 in which the object H exists is determined based on the detected distance, and an area discrimination signal is output. Further, the speed determination unit 6 calculates the moving speed of the detected object H based on the frequency fluctuation of the received wave received by the object detector 1, and outputs speed data. These area discrimination section 5 and speed discrimination section 6
Both are triggered and activated by the object detection signal from the signal level discriminator 3.

The detection speed setting section 7 has two types of detection reference speed range data set and stored therein, and reads and outputs the reference speed range data corresponding to the area discrimination signal inputted from the area discrimination section 5. The comparison unit 8 compares the reference speed range data output from the detection speed setting unit 7 and the detected speed data from the speed determination unit 6, and starts the door when the detected speed data is within the reference speed range data. Output a signal. The signal discrimination section 9 detects the moving direction of the detected object H with respect to the automatic door D from the output signal of the area discrimination section 5 when the door activation signal is input from the comparison section 8, and also detects the moving direction of the detected object H with respect to the automatic door D. If the direction is toward the automatic door D, a door open signal is output, and if the direction is away from the automatic door D, a door close signal is output.

As shown in FIG. 2, object detectors 1 are installed on the indoor side and the outdoor side of the automatic door D, respectively, so that a pair of the configurations shown in FIG. 1 are provided. Also,
The two detection areas aLa2 of each object detector 1 are 1 (0.1 m) to L from the automatic door D as shown in the figure.
(4m).

Next, the operation of the above embodiment will be explained with reference to the flowchart shown in FIG. The signal level determination unit 3 compares the electrical signal output from the object detector 1 and amplified by the amplifier 2 with a reference signal of a certain level, and determines whether the electrical signal is higher than the level of the reference signal or not. It constantly monitors whether the object H has entered the detection areas al, a2 (step S1), and outputs an object detection signal when it detects a change exceeding the set detection degree based on the reference signal.

When a detected object [I that has entered the detection area is detected and an object detection signal is output, the area discrimination section 5 and speed discrimination section 6 are both triggered and driven by this detection signal, and the speed discrimination section 6 calculates the moving speed of the detected object H based on the frequency fluctuation of the electric signal from the amplifier 2 (step S2).

On the other hand, the area determination unit 5 first calculates the distance from the object detector 1 to the detected object H based on the time from when the transmitted wave of the object detector 1 is emitted to when the received wave reflected from the transmitted wave is received (step S3) Do it. From this calculated distance, it is determined whether or not the object H has entered into the first detection area a1 (step S4) L, the first detection area a1
If not, then it is determined whether or not it is the second detection area a2 (step S7), and an area discrimination signal is output to the detection speed setting section 7. Here, if the object detector 1 outputs a detection signal due to disturbance noise or the like,
If both steps S4 and S7 are determined to be No, the process jumps to step S1, and no malfunction occurs.

Next, the detection speed setting section 7 reads reference speed range data corresponding to the area discrimination signal inputted from the area discrimination section 5 and outputs it to the comparison section 8 . For example, if it is determined that the area is in the first detection area a1, then 1.0 to 3
The first reference speed range of 0 (m/sec) is read out and set (step S5), and if it is determined that it is the second detection area a2, then 0 to 2.
A second reference speed range of 0 (m/sec) is read out and set (step S8). Then, in the comparison section 8, it is determined whether or not the detected speed of the object calculated by the speed determination section 6 described above is within the set reference speed range (step S6, step S9).

If it is determined in either step S6 or step S9 that the detected speed is within the reference speed range,
The comparison unit 8 outputs a door activation signal to the signal discrimination unit 9, and the signal discrimination unit 9 determines whether the detected object H is moving toward the automatic door D based on the area discrimination signal from the area discrimination unit 5. It is determined whether or not (step S10).

That is, if the initially input area discrimination signal represents the first detection area a1, it is determined that the automatic door D is approaching, and a door open signal is output (step S11).
"do. On the other hand, if it represents the second detection area a2, it is determined that the object is moving away from the automatic door D, and when the door close signal is emitted, the first detected object H
1 enters the first detection area a1 at a speed of 0.5 m/sec and moves toward the automatic door 〇, and the second detected object H2 enters the first detection area a1 at a speed of 1.5 m/sec. Enter detection area a1 and move towards automatic door 〇,
The third detected object H3 comes to rest in front of the automatic door D,
It is assumed that the fourth detected object H4 moves approximately parallel to the automatic door D within the first detection area a1.

In the case of the first detected object H1, the first detection area a
1, the object is detected by the object detector 1, but it is determined No in step S6, and the process proceeds from step S2 to step S.
Repeating the loop of step 6, the automatic door D is kept closed, enters the second detection area a2, and enters step S9.
A door open signal is output after waiting for a YES determination.

When the user passes through the opened automatic door D and enters the second detection area a2 on the opposite side, the answer is YES in step S9.
S and step SIO are determined to be No, respectively, and the automatic door 〇 is closed.

In the case of the second detected object H2, the first detection area a1
When the object is detected by the object detector 1, a YES determination is made in step S6, and a door open signal is immediately output. The automatic door 〇 is kept open until it passes through the second detection area a2,
When entering the first detection area a1, in step S6
The automatic door D is closed by determining NO in ES and NO in step SIO.

Furthermore, since the third detected object H3 is located within the second detection area a2 in front of the object detector 1, YES is always determined in step S9 during the repetition of the loop. Here, if the driver is moving toward automatic door 〇 and then stopping, step SIO will always determine YES, so the output of the door open signal will continue; In this case, the door close signal continues to be output.

Furthermore, since the fourth detected object H4 moves within the first detection area a1 parallel to the automatic door D, the object detector 1
The distance from the
The automatic door D will not be opened unless detection speed data of /sec or less is output and the vehicle enters the second detection area a2.

In this way, automatic door 〇 is opened at a quick timing for an object moving at a fast speed, and automatic door D is opened at a slow timing for an object moving at a slow speed. The automatic door will be opened for the minimum amount of time necessary depending on the moving speed of the automatic door, and even if the object is moving within the detection area, the automatic door will be opened automatically for objects that do not pass through the automatic door unless they are very close to the automatic door. This has the advantage of not having to open and close the door 〇.

FIG. 5 shows another embodiment of the present invention, and in this figure, the same or equivalent parts as in FIG. The difference from Figure 1 is that
The area discrimination section 3 is configured to output each area discrimination signal for the first detection area a1 and the second detection area a2 from separate terminals, and accordingly, the detection speed setting section and the comparison section are divided into two parts. ,, a first detection speed setting section 7a in which the first reference speed range is set and stored, a second detection speed setting section 7b in which the second reference speed range is set and stored, the detection speed and the first reference speed. A first comparison section 8a that compares the detected speed with the second reference speed range and a first comparison section 8a that compares the detected speed with the second reference speed range are provided, and a corresponding comparison is performed using the area discrimination signal of either one of the area discrimination sections 5. This is only a configuration in which parts 9a and 9b are selectively driven, and the same effect as in FIG. 1 can be obtained.

The present invention is not limited to the above description and illustrated examples, but may include various modifications without departing from the scope of the claims. For example, it goes without saying that three or more detection areas can be provided by the detection area setting means and a reference speed range can be provided for each detection area. Also,
As the object detector 1, in addition to the ultrasonic Doppler sensor described in the embodiment, an ultrasonic sensor or an infrared sensor can also be used. For example, in an ultrasonic sensor, the distance to the detected object H is calculated by measuring the time from irradiating the detected object H with ultrasonic waves to receiving the reflected reception wave, and in an infrared sensor, the distance to the detected object H is calculated by triangulation. The distance to the detected object H is measured by this method. Then, these object detectors are driven periodically, for example, every 0.5 seconds to calculate the distance periodically, and the moving speed of the object is calculated from the amount of change in the periodically output distance data. It may be configured as follows.

Furthermore, a radio Doppler sensor can also be used as an object detector. This radio wave Doppler sensor can only detect the moving speed of the detected object from the frequency fluctuation of the reflected reception wave from the detected object, but for example,
A pair of object detectors are provided for indoor and outdoor use, and the detection areas of each of these two object detectors are set to be different for an area far from the automatic door and an area close to the automatic door. The reference speed range of the object to be detected by the object detector may be set to be fast for the far detection area and slow for the close detection area.
Therefore, the detection area setting means does not use the above-mentioned transmitting/receiving horn or the like, but is constituted by a plurality of object detectors each having a different detection area.

<Effects of the Invention> Since the present invention is configured and operates as described above, it produces the following effects. That is, according to the automatic door activation switch device of the present invention, when an object such as a human body moves at a high speed, the automatic door start switch device starts the automatic door activation at the timing when it is detected that the object enters the detection area away from the automatic door. If the automatic door opens quickly and an object moves at a slow speed, the automatic door will open slowly when the object enters the detection area near the automatic door. The automatic door can be opened for the minimum amount of time necessary depending on the speed of the object passing through, saving energy during cooling and heating, and preventing noise from entering from outside as much as possible.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of its detection area, Fig. 3 is a flowchart thereof, Fig. 4 is a schematic plan view for explaining the operation, and Fig. 5 is an explanatory diagram of its detection area. FIG. 6 is a block diagram of another embodiment of the present invention, and FIG. 6 is a block diagram of a conventional example. 1.--Object detector 7-.1 Detection speed setting section (detection speed setting means) 8, 8a, 8b.1.Comparison section (comparison means) H, Hl~H
4.1 Detected object D...Automatic door al, a2-11 detection area

Claims (1)

[Claims] (1) An object detector that is installed close to an automatic door and outputs an electrical signal that fluctuates in response to the entry of a moving object such as a human body into a predetermined detection area set near the automatic door. In this automatic door start switch device, which detects an object by fluctuations in the output electric signal of the object detector and outputs a signal to control opening/closing of the automatic door, the distance from the automatic door is different depending on the object detector. a detection area setting means that sets a plurality of detection areas to detect the object; a detection speed setting means that sets a reference speed range of the object to be detected for each of the detection areas to be faster as the distance from the automatic door increases; an electrical signal corresponding to the moving speed of the detected object to be output; a reference speed range set in the detection speed setting means corresponding to the detection area where the detected object to which this electrical signal is output is present; An automatic door start switch device comprising: comparison means for comparing the values and outputting an automatic door start signal.