JP2009203749A - Automatic door sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic door sensor monitoring an area (a doorway area) E1 on a track of a door 3 by a plurality of sensors 1, 2 provided at the door 3 and optionally switching validity and invalidity of the detected state of the doorway area E1 when the respective sensors 1, 2 are allowed to communicate with each other. <P>SOLUTION: The opened/closed state of the door 3 is determined based on a communication state between the respective sensors 1, 2 depending on the presence or absence of conduction between a pair of communication lines 10, and the detected state of the doorway area E1 is switched to validity or invalidity according to the opened/closed state of the door 3. The validity and invalidity of the detected state of the doorway area E1 can thereby be optionally switched with simple constitution without providing a separate sensor for monitoring the doorway area E1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an automatic door sensor that detects an area (doorway area) on a track of a door with a plurality of sensors provided on the door and enables each sensor to communicate.

  In general, a pair of sensors (for example, an ultrasonic sensor or an AIR (active infrared) sensor) provided on both sides of a door of an entrance / exit of a building or the like each have an object detection area. There is known an automatic door sensor that outputs an object detection signal to a controller when an object that changes the reference level of object detection is detected. In this automatic door sensor, for example, in order to ensure the safety of an area on the track of the door (doorway area), a sensor for detecting the presence of an object such as a human body is separately provided in the doorway area, and detection of one sensor is performed. When an intruder is detected in the area, the detection state of the doorway area is validated, and when an object is detected by this separate sensor, the door open state is maintained.

  However, it is cumbersome to provide separate sensors in addition to the pair of sensors on both sides of the door, and when the separate sensors detect an object by changing the reflectance of the floor, for example, a mat on the floor or floor There has been a problem that the reliability of the opening / closing operation in the doorway area is liable to be impaired, for example, a door change is erroneously detected as an object detection due to a change in floor surface such as surface wetness and the door is not closed. Therefore, without providing a separate sensor for detecting the opening and closing of the door, an automatic door sensor that allows part of the detection areas of the sensors on both sides of the door to intersect each other vertically above the track and allows communication between the two sensors. Is known (for example, Patent Document 1).

This automatic door sensor enables the detection status of the doorway area of the other sensor to be valid by the validity of the detection status of one doorway area by communication between both sensors. In this case, both sensors simultaneously detect objects in the doorway area. Only when you keep the door open, ensure safety in the doorway area. If an intruder is not detected in the detection area away from the doors of both sensors, even if both sensors detect a door closed state different from the floor, the detection state of the doorway area is invalidated and the door closed state is maintained. Prevent misrecognition.
JP 2002-285755 A

  However, in the case of an automatic door that restricts the number of people entering from outside the door and does not restrict the number of people leaving from inside, such as before the opening of a supermarket or after the regular closing of a bank, for example, When an intruder is detected in the detection area, the detection state of the doorway area becomes valid, and if a door close different from the floor is detected as an object, an object detection signal is output from the outside sensor to the controller. Therefore, the door opening operation should not be performed. However, since the sensors are communicating with each other, when the outer sensor transmits an object detection signal (the detection state of the doorway area is valid) to the inner sensor, the inner sensor is also enabled in the detection state of the doorway area. Similarly, since the door closing is detected, an object detection signal is output from the inner sensor to the controller, and the inner sensor does not apply the above restriction, so the door is opened and the original purpose cannot be achieved. . Therefore, a separate sensor for detecting the door opening / closing state may be provided so that the validity of the detection state of the doorway area can be arbitrarily switched according to the door opening / closing state. It is complicated.

  The present invention solves the above-described problems, monitors the area on the track of the door (doorway area) with a plurality of sensors provided on the door, and enables each sensor to communicate. An object of the present invention is to provide an automatic door sensor capable of arbitrarily switching between valid and invalid detection states.

  In order to achieve the above object, an automatic door sensor according to one configuration of the present invention is provided on a door to detect an object, and each doorway area, which is an area on the track of the door, is a part of the detection area. A plurality of sensors connected to each other by at least two communication lines so as to be communicable, and a communication means incorporating a conduction device that conducts between the communication lines according to opening / closing of the door between the communication lines; A doorway that performs control to determine whether the door is open or closed based on the communication state between sensors based on the presence or absence of conduction between communication lines, and to switch the detection state of the doorway area between valid and invalid according to the open / closed state of the door. And a control unit.

  According to this configuration, when the doorway area is monitored by a plurality of sensors provided on the door and each sensor is communicable, the door is based on the communication state between the sensors based on the presence or absence of conduction between the communication lines. The doorway area detection state is switched between enabled and disabled according to the door open / closed state, and the doorway area can be detected with a simple configuration without providing a separate sensor for monitoring the doorway area. It is possible to switch between valid and invalid states.

  Preferably, the doorway control unit performs control to change a stationary detection time that does not change a reference level of object detection when both sensors detect an object in the doorway area at the same time. Therefore, the stationary detection time can be made infinite so as not to change the reference level of object detection, the door can be kept open, and the safety of the doorway area can be ensured.

  Preferably, the plurality of sensors are a pair of sensors provided on both sides of the door, and the doorway area included in the detection area intersects each other vertically above the track of the door, and the doorway control The section activates the detection state of the sensor doorway area when there is an intruder in the detection area away from the door, the detection state of the doorway area of the sensor on one side of the door is valid, and the doorway When an object is detected in the area, the doorway detection signal output from the sensor on one side is determined not to be received by the sensor on the other side due to conduction between the communication lines. Control is performed to keep the detection state of the doorway area invalid. Therefore, it is possible to control to restrict passage from one side of the door with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of an automatic door control device using an automatic door sensor according to an embodiment of the present invention. This automatic door sensor S is attached to the inner and outer surfaces of the invisible eye 4 that supports, for example, the upper end of the sliding door 3 to detect an object, and is provided on the inner and outer sides of the door 3. A pair of sensors 1 and 2 having a doorway area E1 which is an area on the orbit as a part of the detection area, and a communication means 5 for connecting the sensors 1 and 2 so as to communicate with each other. For example, an AIR (active infrared) sensor is used for the pair of sensors 1 and 2.

  In this example, the doorway area E1 of the pair of sensors 1 and 2 intersects with each other vertically above the track of the door 3, and detection areas E2 to E5 apart from the door 3 are provided for activation. Yes.

  As shown in FIG. 2, the communication means 5 connects the sensors 1 and 2 with a pair of communication lines 10, and conducts between the communication lines 10 between the pair of communication lines 10 according to the opening and closing of the door 3. The conducting device 6 is incorporated. For the conduction device 6, for example, a device that reads the opening and closing of the door 3 such as a magnet switch is used. A pair of communication lines 10 shown in FIG. 3 is composed of two lines, for example, a signal line 11 and a GND line 12. In addition, an electric lock that puts a lock piece in the door 3 and firmly locks the door 3 may be installed, and this may be linked to the conduction device 6.

  As shown in FIG. 3, the pair of sensors 1 and 2 includes a detection unit 13 that detects an object, a control unit 14 that controls the entire sensor, communication control units 15 and 16, and an object detection signal to the controller 7. And an output unit 19 for outputting. The control unit 14 includes a doorway control unit 8, which determines the open / closed state of the door 3 based on the communication state between the sensors 1 and 2 depending on the presence / absence of conduction between the pair of communication lines 10. Control to switch the detection state of the doorway area E1 between valid and invalid according to the open / closed state of the door 3 is performed.

  That is, the doorway control unit 8 validates the detection state of the doorway area E1 when there is an intruder in the detection areas E2 to E5 apart from the door 3, for example, the doorway control unit 8 of the doorway area E1 of the outer sensor 1 When the detection state is valid and an object is detected in the doorway area E1, the doorway detection signal output from the outer sensor 1 is converted into the outer sensor 1 and the inner sensor 2 by the conduction between the communication lines 10. On the basis of the state that is not received by the control, it is determined that the door is closed, and control is performed to keep the detection state of the doorway area E1 invalid.

  The automatic door control device of FIG. 1 includes a controller 7 that performs opening / closing control of the door 3 and that keeps the door open when both sensors 1 and 2 detect an object in the doorway area E1 at the same time. The controller 7 and the door engine 9 are attached inside the seamless 4 or inside the door 3. The controller 7 normally opens and closes the door 3 by driving the door engine 9 in response to the input of the object detection signal when there is an intruder in the detection areas E2 to E5 of the sensors 1 and 2.

  Hereinafter, the operation of the automatic door sensor S will be described. In this example, the passage from the outside of the door 3 is restricted, but the passage from the inside of the door 3 may be restricted. As shown in FIG. 3, for example, the communication control unit 15 of the outer sensor 1 is a master, and the communication control unit 16 of the inner sensor 2 is a slave. The communication means 5 uses a one-to-one two-wire polling system with the master 15 and the slave 16 to transmit signals such as a doorway detection signal on the master 15 side and a doorway detection signal on the slave 16 side by a known transmission procedure. .

  In FIG. 3, when the conducting device 6 is opened when the door is open, the pair of communication lines 10 are not conducting, so the polling signal from the transmission unit (TXD) of the master 15 passes through the path indicated by the arrow a1, so that the coupler 17 Becomes an operating state and echoes back to the receiver (RXD). At this time, the doorway detection signal is transmitted to the slave 16 following the polling signal. That is, a signal indicating the door open state is transmitted from the master 15 to the slave 16 by the transmission of these signals. When the conduction device 6 is closed when the door is closed, the communication line 10 is electrically connected. Therefore, the polling signal from the transmission unit (TXD) of the master 15 passes through the path indicated by the arrow a2, so the coupler 17 does not reach the operating state. , It is not echoed back to the receiver (RXD). At this time, the polling signal and the doorway detection signal are not transmitted to the slave 16. That is, since these signals are not transmitted, a signal indicating the door closed state is transmitted from the master 15 to the slave 16.

FIG. 4 is a timing chart showing the operation when the door is opened. T1 is a polling signal transmission time, T2 is a polling signal and doorway detection signal transmission time, T3 is a reply time interval, and T4 is a polling period.
(1) The master 15 transmits a polling signal from the transmitter (TXD) at a constant interval (T4) for T1 time.
(2) When the doorway area E1 is in the detection state, the master 15 side transmits the doorway detection signal for the time T2 following the polling signal.
(3) When the transmitted polling signal is echoed back to the receiving unit (RXD), the master 15 side determines that the door 3 is open.
(4) The slave 16 side determines that the door 3 is open by receiving the polling signal from the master 15 side.
(5) The slave 16 side transmits a reply signal for a time T1 after a predetermined interval (T3) starting from the polling signal on the master 15 side.
(6) When the doorway area is in the detection state, the slave 16 side transmits a doorway detection signal following the return signal.
(7) The master 15 side recognizes the detection state of the slave 16 by receiving the reply signal and doorway detection signal from the slave 16 side.

  When the door is open, first, when there is an intruder in the detection areas E2 to E5 away from the door 3 of the outer sensor 1 by the doorway control unit 8, the detection state of the doorway area E1 of the outer sensor 1 is valid. Is done. At this time, when the outer sensor 1 outputs an object detection signal to the controller 7 and detects a door closing different from the floor surface as an object in the doorway area E1, the outer sensor 1 from the master 15 to the inner sensor 2 is detected. A doorway detection signal is output ((2) above). Since this doorway detection signal is received by the slave 16 of the inner sensor 2 when there is no continuity between the pair of communication lines 10, it is determined that the door is open ((4) above), and the detection state of the doorway area E1 is validated. When the switching control is performed and the doorway area E1 is in the detection state, an object detection signal is output from the inner sensor 2 to the controller 7.

  By the way, in the automatic door sensor S, the object detection reference level is normally set in advance at predetermined time intervals in accordance with changes in the floor surface such as floor mat displacement and floor wetness. The doorway control unit 8 does not change the reference level of object detection when the door is opened and both sensors 1 and 2 detect an object in the doorway area E1 at the same time. Since control for changing the stationary detection time to infinity is performed, the door open state can be maintained and the safety of the doorway area E1 can be ensured.

FIG. 5 is a timing chart showing the operation when the door is closed.
(1) The master 15 transmits a polling signal from the transmitter (TXD) at a constant interval (T4) for T1 time.
(2) When the doorway area E1 is in the detection state, the master 15 side transmits the doorway detection signal for the time T2 following the polling signal.
(3) When the transmitted polling signal does not echo back to the receiving unit (RXD), the master side 15 determines that the door 3 is closed.
(4) Since the slave 16 side does not receive the polling signal and doorway detection signal from the master 15 side, it determines that the door 3 is closed and does not transmit a reply signal.

  When the door is closed, first, when the doorway control unit 8 enters the detection areas E2 to E5 of the outer sensor 1, the detection state of the doorway area of the outer sensor 1 is effective when the door is opened. At this time, the outer sensor 1 outputs an object detection signal to the controller 7 and outputs a doorway detection signal to the inner sensor 2 when a door closing different from the floor surface is detected as an object in the doorway area E1. ((2) above). However, since this doorway detection signal is not received by the slave 16 of the inner sensor 2 due to conduction between the pair of communication lines 10, it is determined that the door is closed ((4) above), and the detection state of the doorway area E1 is invalidated. Control is performed to maintain the state, and no object detection signal is output from the inner sensor 2 to the controller 7. As a result, the controller 7 of the automatic door control device ignores the object detection signal from the outer sensor 1 and does not receive the object detection signal from the inner sensor 2 in accordance with the passage restriction from the outside of the door 3. Therefore, control is performed to maintain the door closed state and restrict passage from the outside of the door 3. In this way, it is possible to determine the opening / closing state of the door 3 based on the communication state between the sensors 1 and 2 and perform desired door opening / closing control.

  When there is no intruder in the detection areas E2 to E5 of both sensors 1 and 2 and the detection state of the doorway area is switched to invalid, the doorway control unit 8 closes both doors 1 and 2 at the same time. Even if detected, it is invalidated and the door 7 is kept closed by the controller 7. When an intruder is detected in the detection areas E <b> 2 to E <b> 5 of the inner sensor 2, the door is opened because there is no passage restriction from the inner side of the door 3.

  Thus, in the present invention, when the doorway area E1 is monitored by the pair of sensors 1 and 2 provided on both sides of the door 3 and both the sensors 1 and 2 can communicate, the continuity between the pair of communication lines 10 is established. Since the open / closed state of the door 3 can be determined based on the communication state between the sensors 1 and 2 depending on the presence / absence of the door 3, the door 3 can be detected in the communication state of the sensors 1 and 2 without providing a separate sensor for monitoring the doorway area E1. Since the open / closed state of the doorway area E1 can be recognized, the detection state of the doorway area E1 can be arbitrarily switched between valid and invalid with a simple configuration. In addition, the doorway area is monitored by a pair of sensors 1 and 2 provided on both sides of the door 3, and the conduction device 6 is simply added to the existing system that allows the sensors 1 and 2 to communicate with each other. The present invention can be applied.

  In the above embodiment, the pair of sensors 1 and 2 are attached to both side surfaces of the intangible 4, but instead of this, they may be attached to the ceiling above the inside and outside of the door 3.

  In the above embodiment, the communication means 5 transmits a polling signal and a doorway detection signal from the master 15 of the outer sensor 1 to the slave 16 of the inner sensor 2, and the slave 16 sends the polling signal and the doorway detection signal. A master / slave system is used in which a reply signal and a doorway detection signal are transmitted to the master 15 when received, but a system in which both sensors 1 and 2 are both masters may be used. In this case, since the polling signal and the doorway detection signal are transmitted from both the sensors 1 and 2, the transmission timing of the doorway detection signal is shifted from each other to prevent erroneous recognition of the transmission and return doorway detection signals. it can.

  In the above-described embodiment, the pair of sensors 1 and 2 are provided on the inside and outside of the door 3, but a plurality of sensors may be provided on the inside and / or outside of the door. In this case, instead of using the communication means 5 as a method of connecting one master and one slave as in the above embodiment, a method of connecting a plurality of slaves to one master may be used. Instead of a pair of communication lines 10, two or more pairs may be used.

It is a block diagram which shows the automatic door control apparatus using the automatic door sensor which concerns on one Embodiment of this invention. It is a perspective view which shows a part of automatic door sensor of FIG. It is a block diagram which shows the automatic door sensor of FIG. It is a timing chart which shows operation at the time of door opening. It is a timing chart which shows operation at the time of a door closing.

Explanation of symbols

1, 2: Pair of sensors 3: Door 5: Communication means 6: Conduction device 7: Controller 8: Doorway control unit 10: Pair of communication lines 15, 16: Communication control unit E1: Doorway areas E2 to E5: Detection area S : Automatic door sensor

Claims (3)

A plurality of sensors provided on a door for detecting an object, each having a doorway area that is an area on the track of the door as a part of the detection area;
A communication means which connects each sensor with at least two communication lines so as to be able to communicate, and incorporates a conduction device which conducts between the communication lines according to opening and closing of the door between the communication lines;
The door opening / closing state is determined based on the communication state between the sensors based on the presence / absence of communication between the communication lines, and control is performed to switch the detection state of the doorway area between valid and invalid according to the door open / closed state. Automatic door sensor with doorway control unit. In claim 1,
The doorway control unit is an automatic door sensor that performs control to change a stationary detection time that does not change a reference level of object detection when both sensors detect an object in the doorway area at the same time. In claim 1,
The plurality of sensors is a pair of sensors provided on both sides of the door, and the doorway area included in the detection area intersects each other vertically above the door trajectory,
The doorway control unit is to enable the detection state of the sensor doorway area when there is an intruder in the detection area away from the door, the detection state of the doorway area of the sensor on one side of the door is valid, In addition, when an object is detected in the doorway area, the doorway detection signal output from the sensor on one side is determined to be closed based on a state in which the sensor on the other side is not received due to conduction between the communication lines. An automatic door sensor that performs control to keep the detection state of the doorway area invalid.

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