JPH0495794A - Entry/leave controlling apparatus - Google Patents

Abstract

PURPOSE:To make it unnecessary to detect the presence of people in the whole room and to reduce the number of sensors by detecting the moving direction of the object to be detected on the basis of detecting signals from a plurality of sensors. CONSTITUTION:The presence/absence of an object 2 is detected by a plurality of infrared sensors 1 aligned in the advancing direction with a predetermined distance at the ceiling or the wall near the entrance of a room. These sensors are characteristic of the large detecting angle in a perpendicular direction to the aligning direction. In other words, the changing direction of output signals of the detecting sensors 1 is detected by a direction detecting/controlling part 5, whereby it is detected whether a person enters the room or goes out of the room. The number of persons in the room is counted at an entry/leave managing/controlling part 7. A predetermined time later after the last person leaves the room, the apparatus is turned OFF. Accordingly, the number of sensors can be reduced even for a large room.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is for controlling the number of people entering and leaving washrooms, conference rooms, exhibition rooms, etc., and automatically turning on and off the incidental equipment there. The present invention relates to an entrance/exit control device.

[Conventional technology] Conventionally, incidental facilities such as lights and fans in washrooms, conference rooms, exhibition rooms, etc., have been turned on and off by the person who uses them, but it is common for people to forget to turn them off. many. Therefore, there are many cases in which the device is left on during working hours and turned off when the last person returns home.

However, if such a method is adopted, it remains on even when no user is present, which is extremely wasteful. Therefore, if you cannot rely on the user's attentiveness, it will automatically detect the user and automatically turn on/off based on the result.
There have also been proposals to turn off the power. This is turned on when a user is detected for the first time, and turned off when a user is detected next.

[Problem to be solved by the invention] However, since such conventional devices need to detect people in the room, the number of sensors becomes enormous in a large room, making it extremely uneconomical. There was a problem with this.

[Means for Solving the Problems] In order to solve such problems, the present invention uses a plurality of object detection sensors arranged in the moving direction of the detection object, and detects the detection object based on the direction of change of information from the sensor. The apparatus includes a direction detection control section that detects the moving direction of the object, and an entry/exit management control section that manages the entrance and exit of the detection target based on a signal from the direction detection control section.

The direction detection control section detects the direction of change in the output signal of the object detection sensor, and it is determined whether the user has entered or left the room. The number of people in the room is counted, and the turn-off process is performed after a predetermined time when the last person leaves the room.

[Embodiment] The figure is a block diagram showing an embodiment of the present invention. In the figure, the presence or absence of an object 2 is detected by a plurality of (five in this example) infrared sensors 1 attached to the ceiling or wall near the entrance in parallel at intervals of about 301 in the entrance advancing direction. These sensors have a characteristic that the spread of the detection angle is small in the direction in which they are arranged, and the spread of the detection angle is large in the direction perpendicular to the direction in which they are arranged. When a user passes in front of the sensor 1, the sensor generates a detection signal in the order in which the user passes, which is transmitted to the communication control device 3.
is transmitted to the direction detection control section 5 via the input/output processing Mj4.

The communication control device 3 digitizes the detection signal from the sensor 1, sequentially sends it out, and outputs it to the input/output processing section 4 via an interface such as R5-232C. Input/output processing section 4
outputs the data sent from the sensor 1 to the direction detection control section 5, and the direction detection control section 5 transfers the data to the memory 6 and stores it therein. Then, when the next data is sent from inspection 1, the direction detection control section 5 reads out the data stored in the memory 6, compares both data,
The on or off state of the sensors 11 to 15 that constitute the sensor 1 is determined, and the states of the sensors 1 to 1 are stored in the storage section in the direction detection control section 5, and new data from the sensor 1 is stored in the memory. 6 to be memorized. The above operation is repeated every time data is sent from sensor 1, and direction detection a1
The moving direction of the object 2 is determined from the on/off patterns of the sensors 11 to 15 stored over time in the storage section 5.

Note that the data group of the sensor 1 is appropriately labeled with an identification code of the sensor 1 in order to distinguish it from the data groups of other sensors.

In other words, the detection order of the sensors is 11.12.13...-
- In the case of the order 15, the direction detection control s5 determines that the movement of the object 2 is in the "in" direction from the left to the right in the figure, and in the case where the detection order is reversed, in the "out" direction.

At this time, two sensors may work at the same time depending on the position of the detection target. For example, if sensors 11 and 12 are on, as the detection target moves in the "in" direction,
Sensor 11 goes from on to off, sensor 12 continues on,
Since sensor 13 changes from off to on, sensor 1.
By determining the on/off direction of the sensors 1□-15 from the on-off patterns of the sensors 1□-15, the moving direction can be easily detected.

Then, when the object 2 moves in a specific direction and passes the sensor 1, that is, when the sensor changes from the on state to the off state, it is output to the entrance/exit management unit 7 as the object 2 has entered or exited. .

The signal detected by the movement direction detection control section 5 is used in the entrance/exit management control section 7 to count and compare the number of people entering and the number of people leaving.
When "number of people entering > number of people leaving", it is determined that there are people in the room, and the auxiliary equipment 8 is controlled to be kept in the on state via the input/output processing unit 4 and the interface. Output a signal. "Number of people entering = Number of people leaving"
If this happens, it is determined that there is no one inside, and the auxiliary installation i8 is controlled to be turned off after a certain period of time. The auxiliary equipment 8 is switched by an electromagnetic relay or the like based on the control signal.

In addition, by monitoring the operating status of ancillary equipment, if the operating mode recognized by the access management control unit does not match the equipment's operating mode (for example, if the equipment malfunctions and the equipment does not turn on even if the on command is output) (e.g., if the abnormality does not occur), it is also possible to output an alarm signal to notify the outside of the occurrence of an abnormality.

[Effects of the Invention] As explained above, in this invention, since the moving direction of the detection target is detected based on the detection signals of a plurality of sensors, it is not necessary to detect the occupants in the entire room. Since only the entrance is required, the number of sensors to be installed is significantly smaller than that of the conventional system, which has the effect of being economical.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. ■...sensor, 2...detection target, 3...-communication control device, 4...-input/output processing section, 5...direction detection section, 6...-memory, 7... Entrance/exit management control section.

Claims (1)

[Claims] a plurality of object detection sensors disposed in the moving direction of the detection object to detect the presence or absence of the detection object; a direction detection control unit that detects the movement direction of the detection object based on the direction of change in information from the sensor; An entrance/exit management control device comprising: an entrance/exit management control section that manages the entrance/exit of a detection target based on a signal from a direction detection control section.