JP2010083647A - Man detection system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of erroneous detection and non-detection of a passenger boarding-alighting in/from a car of an elevator. <P>SOLUTION: An image analyzer 102 determines whether or not the temperature in the car 201 of the elevator is kept at the constant temperature by receiving and analyzing a heat image from a heat image photographing device 101. A control device 103 generates air-conditioning control information for commanding to adjust the temperature in the car 201 when determining that the temperature in the car 201 is not kept at the constant temperature by the image analyzer 102. An air conditioner 104 adjusts air in the car 201 according to this air-conditioning control information. The image analyzer 102 analyzes a difference between two heat images by comparing the two heat images continuously received from the heat image photographing device 101. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator human detection system. The present invention particularly relates to a system for detecting the number of people in an elevator.

  As a prior art, a system that calculates the difference in "brightness" between two images taken inside the elevator car at different consecutive times, and detects a person's getting on and off (motion) in the car based on the magnitude of the difference (hereinafter referred to as "the brightness") (Referred to as Patent Document 1).

As another conventional technique, a thermal image inside the elevator car is formed, and the number or movement of the user is detected from the thermal image, and the elevator crime prevention device or the air conditioner is controlled by the number or movement of the user. System (hereinafter referred to as “second conventional system”) (see, for example, Patent Document 2).
JP-A-10-302171 JP 7-172722 A

  In the first conventional system, since the determination is made based on the difference in luminance, there is a problem that erroneous detection or non-detection increases depending on the material of the elevator car.

  For example, if the elevator car is made of stainless steel and resin, the difference in brightness differs greatly depending on the material of the car even if the person performs the same operation, but the movement is detected in the stainless steel car. A situation occurs in which a movement is not detected in a resin basket (the number of undetected cases increases in a resin basket). In order to avoid this, if the threshold value for detecting motion (that is, the difference in brightness that is a criterion for determining whether or not a person has moved) is lowered, even if the person does not perform much movement, the resin cage A situation occurs in which a movement is not detected but a movement is detected in a stainless steel basket (a false detection increases in a stainless steel basket).

  Also, if there is a light source near or within the imaging range of the imaging device installed in the elevator car, the brightness will change greatly due to the blinking of the light source, so motion is detected even when there are no moving objects in the imaging range. (The number of false positives increases). In addition, some imaging devices have a function of automatically adjusting the brightness by measuring the surrounding brightness. When such an imaging device is used, for example, the brightness adjustment is performed even when the car is in a resting state. Because it keeps doing, it always detects the movement (and more false detections).

  In addition, in an elevator for observation, etc., a car whose doors and walls are made of a material that transmits external light, such as glass, may receive external light randomly (for example, a car light). Detects movement regardless of the situation (increased false detections).

  As described above, in the first conventional system, when the imaging device is installed in the car, the threshold value for detecting movement is changed according to the material of the car, the distance from the light source, and the like, or the automatic brightness adjustment of the imaging device is performed. It is necessary to take measures such as changing the image processing algorithm according to the presence or absence of a function, etc., and further excluding members that transmit light outside the cage from the determination target (or disabling such members). Become. However, such adjustment work is very complicated.

  On the other hand, in the second conventional system, since the determination is performed based on the thermal image instead of the difference in luminance, there is a problem that erroneous detection or non-detection may increase depending on the temperature inside the elevator car.

  An object of the present invention is, for example, to make it difficult for erroneous detection and undetection of passenger boarding / exiting in an elevator car.

An elevator human detection system according to an aspect of the present invention includes:
A thermal imaging device that captures and transmits thermal images in the elevator car;
An image analysis device that determines whether the temperature in the car is maintained at a constant temperature by receiving and analyzing the thermal image from the thermal image capturing device;
A controller that generates and transmits air-conditioning control information instructing to adjust the temperature in the car when the image analysis apparatus determines that the temperature in the car is not maintained at a constant temperature;
Receiving air conditioning control information from the control device, and according to the received air conditioning control information, an air conditioning device for adjusting the air in the car,
The image analysis device detects passengers getting in and out of the car by comparing two thermal images successively received from the thermal image capturing device and analyzing a difference between the two thermal images. And

  According to one aspect of the present invention, the image analysis device receives the thermal image from the thermal image capturing device and analyzes it to determine whether or not the temperature in the car is maintained at a constant temperature, and the control device However, if the image analysis device determines that the temperature inside the car is not maintained at a constant temperature, it generates air conditioning control information that instructs to adjust the temperature inside the car, and the air conditioning device follows the air conditioning control information. In order to adjust the air in the car, the image analysis device compares two thermal images received continuously from the thermal imaging device and analyzes the difference between the two thermal images, thereby When detecting boarding / alighting, erroneous detection and non-detection are less likely to occur.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an external view showing a configuration of an elevator human detection system 100 according to the present embodiment.

  In FIG. 1, the human detection system 100 includes a thermal image capturing device 101, an image analysis device 102, a control device 103, an air conditioner 104, a display device 105, and a sound output device 106.

  The thermal image capturing apparatus 101 is an apparatus (for example, thermography) that is installed inside an elevator car 201 and generates a heat distribution in an imaging range as an image. The image analysis apparatus 102 is an apparatus that is installed in the control room 202 of the elevator and analyzes the group of images captured by the thermal image capturing apparatus 101 to grasp the situation inside the car 201. The control device 103 is installed in the control room 202 of the elevator, and is a device that controls other devices by transmitting control information to the other devices. Further, the control device 103 stores information indicating the state in the car 201 in a storage medium or the like, updates the contents according to the situation in the car 201, and further updates the update information to other devices. It is a device that transmits. The air conditioner 104 is a device that is installed on the ceiling (upper part) of the elevator car 201 and adjusts the air in the car 201 under the control of the control device 103. The display device 105 is installed inside the elevator car 201 and is a device that displays update information and the like on the screen under the control of the control device 103. The voice output device 106 is a device that is installed inside the elevator car 201 and that outputs update information and the like through voice control under the control of the control device 103.

  In this embodiment, since the thermal image is used as a determination material for passengers (users) getting on and off (movement) in the car 201, the temperature in the car 201 needs to be adjusted by the air conditioner 104.

  In the present embodiment, the display device 105 and the audio output device 106 are examples of an output device that informs the user of the situation in the car 201. However, if the information notification to the user is unnecessary, it is not installed. May be.

  FIG. 2 is a block diagram showing the configuration of the elevator human detection system 100 according to the present embodiment. FIG. 3 is a table showing a specific example of the data shown in FIG.

  The thermal image capturing apparatus 101 captures a thermal image in the elevator car 201 and transmits it to the image analysis apparatus 102.

  For example, the thermal image capturing apparatus 101 generates thermal image data 301 constantly or periodically and sends it to the image analysis apparatus 102.

  The thermal image data 301 is (1) a heat distribution image of the imaging range of the thermal image capturing apparatus 101.

  The image analysis apparatus 102 receives the thermal image from the thermal image capturing apparatus 101 and analyzes it to determine whether or not the temperature in the car 201 is maintained at a constant temperature. Further, the image analysis device 102 detects passengers getting in and out of the car 201 by comparing two thermal images continuously received from the thermal image capturing device 101 and analyzing the difference between the two thermal images. Furthermore, the image analysis apparatus 102 counts the number of passengers on the car 201 based on the detection result, and stores the number in a storage medium.

  For example, the image analysis device 102 analyzes the thermal image data 301 sent from the thermal image capturing device 101 and detects the current temperature in the car 201. If the temperature is not a predetermined temperature, the image analysis apparatus 102 determines that the temperature in the car 201 is not maintained at a constant temperature, and transmits the determination result to the control apparatus 103 as in-car information 302. In addition, the image analysis apparatus 102 analyzes the thermal image data 301 sent from the thermal image capturing apparatus 101 and confirms a change from the past image. When the amount of change is large, the image analysis apparatus 102 determines that a change has occurred in the situation in the car 201 and transmits the determination result to the control apparatus 103 as in-car information 302.

  The in-car information 302 is information generated from the analysis result of the thermal image data 301 by the image analysis device 102. For example, (2) in-car temperature information indicating the temperature in the car 201 (may indicate whether the temperature in the car 201 is a constant temperature) or (3) the person in the car 201 Information on the number of passengers representing the number, (4) stationary time information obtained by measuring the time from when an object in the car 201 is identified as a person to the next change in the position of the person, and (5) the car 201 For example, the free space information in the car calculated from the area of the area occupied by the person on board the car.

  When the image analysis apparatus 102 determines that the temperature in the car 201 is not maintained at a constant temperature, the control device 103 generates air conditioning control information 304 for instructing to adjust the temperature in the car 201, and the air conditioner 104. The control device 103 performs operation control of the car 201, and generates and displays the content update information 305 according to the operation control state (operation status) and the number of passengers counted by the image analysis device 102. The data is transmitted to an output device such as the device 105 or the audio output device 106.

  For example, when the in-car information 302 indicates that the temperature in the car 201 is not maintained at a constant temperature, the control device 103 determines that the air in the car 201 needs to be adjusted, and the air conditioner 104 The air conditioning control information 304 is transmitted. Moreover, the control apparatus 103 performs various control also with respect to another apparatus from the content of the in-car information 302 and the operation information 303 managed by itself. For example, if it is necessary to notify the user in the car 201, the content update information 305 is transmitted to the display device 105 and the audio output device 106.

  The operation information 303 is information for controlling the car 201 managed by the control device 103. For example, (6) the door opening time information obtained by measuring the door opening time, (7) the door closing time information obtained by measuring the door closing time, and (8) the operation status of the car 201 such as the car 201 being out of service. Applicable to the operation status information shown.

  The air conditioning control information 304 is a kind of the control information described above, and is information for the air conditioner 104 to control the air conditioning in the car 201. For example, (9) current temperature information indicating the current temperature in the car 201, (10) set temperature information indicating the temperature to be set, and the like are applicable.

  The content update information 305 is the update information described above and is a kind of guidance information for passengers, and causes the display device 105 and the voice output device 106 installed in the car 201 to update the display content and output the voice. It is information for. For example, (11) sitting (falling) information indicating that a person sitting in the car 201 or a person who has fallen due to a sudden illness or the like (12) a ride that indicates a guideline for how many people can ride in the car 201 Applicable information such as the number of remaining people.

  The air conditioner 104 receives the air conditioning control information 304 from the control device 103 and adjusts the air in the car 201 according to the received air conditioning control information 304.

  Output devices such as the display device 105 and the audio output device 106 receive the guidance information from the control device 103 and output it within the car 201.

  For example, the display device 105 displays a corresponding display item on the liquid crystal screen according to the content of the content update information 305 transmitted from the control device 103. The audio output device 106 outputs a corresponding audio output item according to the content of the content update information 305 transmitted from the control device 103.

  FIG. 4 is a flowchart showing the operation of the elevator human detection system 100 according to the present embodiment.

  The thermal image capturing apparatus 101 sequentially transmits the captured thermal image data 301 to the image analysis apparatus 102 (step S101).

  The image analysis apparatus 102 analyzes the thermal image data 301 received from the thermal image capturing apparatus 101, and determines whether or not the temperature in the car 201 is maintained at a constant temperature (for example, 25 ° C.) (step S102). If the temperature in the car 201 is not maintained at a constant temperature (step S103), the fact is transmitted to the control device 103 as car information 302 (step S104).

  In addition, the image analysis apparatus 102 compares the thermal image data 301 received from the thermal image capturing apparatus 101 with the thermal image data 301 acquired before that, and checks whether there is a change (step S102). If there is a change (step S103), the contents of the change are transmitted to the control device 103 as in-car information 302 (step S104).

  When the in-car information 302 received from the image analysis apparatus 102 indicates that the temperature in the car 201 is not maintained at a constant temperature, the control device 103 sets the temperature in the car 201 to, for example, 25 ° C. ) Air-conditioning control information 304 for commanding adjustment is generated (step S105). Then, the control device 103 transmits the generated air conditioning control information 304 to the air conditioning device 104 (steps S106 and S107).

  In addition, the control device 103 combines the in-car information 302 received from the image analysis device 102 and the contents of the operation information 303 managed by the control device 103 with other devices in the car 201 (display device 105, audio output device 106). ) Is determined, and if it is necessary to operate, the operation content is determined (step S105). Thereafter, the control device 103 sequentially issues corresponding instructions (content update information 305) to the control target (display device 105, audio output device 106) based on the determined content (steps S106, S108, S109).

  The air conditioner 104 receives the air conditioning control information 304 from the control device 103, and performs air conditioning control in the car 201 based on the instructed contents (step S107).

  The display device 105 receives the content update information 305 from the control device 103, and updates the display content of the screen based on the instructed content (step S108).

  The audio output device 106 receives the content update information 305 from the control device 103, and performs audio output based on the instructed content (step S109).

  As described above, in the present embodiment, an image (thermal image data 301) captured by the thermal image capturing apparatus 101 installed in the car 201 is sent to the image analysis apparatus 102, and the image analysis apparatus 102 uses the car 201. Check whether the temperature inside is constant. If the temperature is not constant, the in-car information 302 is transmitted to the control device 103, and the control device 103 controls the air conditioner 104 so that the temperature in the car 201 becomes a constant temperature. According to the present embodiment, since air conditioning control based on such thermal image analysis is possible, the temperature in the car 201 becomes a temperature at which a person cannot be detected or the temperature is not constant, and the temperature is not due to getting on and off of the person It can be avoided that a change is erroneously detected as a person's movement. Furthermore, according to the present embodiment, it is possible to realize a comfortable space for passengers by controlling the temperature in the car 201.

  In the present embodiment, an image (thermal image data 301) captured by the thermal image capturing apparatus 101 installed in the car 201 is sent to the image analysis apparatus 102, and the image analysis apparatus 102 continuously performs two different images. Is detected, and the change in the situation in the car 201 is confirmed. If there is a change, the in-car information 302 is transmitted to the control device 103, and the control device 103 detects the number of persons (person detection) and the inside of the car 201 from the operation information 303 managed by itself and the received in-car information 302. To understand the situation. The control device 103 that grasps the situation in the car 201 provides useful information to passengers in the car 201 by notifying the display device 105 and the audio output device 106 in the car 201 as necessary. can do.

  Further, in the present embodiment, the thermal image data 301 generated by the thermal image capturing apparatus 101 is analyzed to detect a person, so that the car 201 made of a glass material that easily enters outside light and the electric light are likely to be reflected. Even with a basket 201 made of stainless steel, it is possible to accurately detect a person.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  The configuration of the elevator human detection system 100 according to the present embodiment is the same as that of the first embodiment shown in FIGS.

  In the present embodiment, the control device 103 stores the number of cars 201 in a storage medium in advance. When the car 201 is stopped at the landing and the door of the car 201 is opened, the control device 103 determines the number of passengers counted by the image analysis device 102 and the number of cars stored in the storage medium. Calculate the difference. Then, the control device 103 generates a message notifying the calculated difference as the content update information 305 and transmits it to an output device such as the display device 105 or the audio output device 106. The display device 105 displays the message on the liquid crystal screen and informs the passenger. The voice output device 106 transmits the message to the passengers by voice.

  Hereinafter, the operation of the elevator human detection system 100 according to the present embodiment will be described with reference to FIG.

  When a person gets on (or gets off), in step S101, the thermal image data 301 captured by the thermal image capturing apparatus 101 changes.

  In steps S <b> 102 to S <b> 104, the image analysis apparatus 102 transmits the contents of the change to the control apparatus 103 as in-car information 302. Specifically, the content of the change refers to the number of passengers on the car 201 that have changed due to the person's boarding (or getting off). As in the first embodiment, since the image analysis apparatus 102 uses the thermal image data 301, the human body can be accurately detected without being affected by the external light or the material of the car 201. Whenever there is an increase or decrease in the number of passengers determined based on changes in the thermal image data 301, the image analysis device 102 notifies the control device 103 of the number as in-car information 302.

  In steps S <b> 105 to S <b> 109, the control device 103 specifies the number of passengers on the car 201 from the information received from the image analysis device 102. Then, the control device 103 calculates the difference between the number and the capacity of the car 201. For example, if the calculated difference is one, the control device 103 creates a message “You can ride one more”, if it is zero, creates a message “Full”, and if it is −1 Create a message “Over capacity”. The control device 103 transmits the created message to the display device 105 and the audio output device 106 for output. Thereby, useful guide information can be provided to a passenger.

Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  The configuration of the elevator human detection system 100 according to the present embodiment is the same as that of the first embodiment shown in FIGS.

  In the present embodiment, the control device 103 moves the car 201 to a predetermined landing when the car 201 is at rest and the number of passengers counted by the image analysis device 102 is one or more. Open the door. Then, the control device 103 generates a message prompting the user to get off the car 201 as the content update information 305 and transmits the message to an output device such as the display device 105 or the audio output device 106. The display device 105 displays the message on the liquid crystal screen and informs the passenger. The voice output device 106 transmits the message to the passengers by voice.

  Hereinafter, the operation of the elevator human detection system 100 according to the present embodiment will be described with reference to FIG.

  As in the first embodiment, in steps S102 to S104, the image analysis apparatus 102 uses the thermal image data 301. Therefore, the car 201 falls down due to a suspicious person or sudden illness regardless of the state of the car 201. If there is a person, it is possible to accurately detect that person. When the change in the movement of the person is abrupt or the amount of change is large, the image analysis apparatus 102 indicates that there is a suspicious person or a person who has fallen due to sudden illness or the like to the control apparatus 103. The information 302 may be notified, but here, the number of passengers on the car 201 is simply notified as in-car information 302.

  In steps S <b> 105 to S <b> 109, the control device 103 specifies the number of passengers on the car 201 from the information received from the image analysis device 102. For example, even when the car 201 is in a dormant state, even if one person continues to stay in the car 201, the person is considered to be a suspicious person or a person who has fallen due to sudden illness. In such a case, the control device 103 recognizes from the operation information 303 that the car 201 is in a dormant state, and specifies from the in-car information 302 that the number of passengers on the car 201 is one or more. Therefore, it is detected that there is a suspicious person or a person who has fallen due to sudden illness. Then, the control device 103 can take measures such as moving the car 201 to the landing on the specific floor, opening the car 201, displaying a warning message on the screen, or making an announcement. For example, the control device 103 moves the car 201 to the first floor of the building, opens the door of the car 201, and displays a message “please get off the elevator” or “send an emergency signal after 30 seconds”. Can be transmitted to the display device 105 or the audio output device 106 for output.

  As mentioned above, although embodiment of this invention was described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Or you may implement combining two or more embodiment among these partially.

1 is an external view showing a configuration of an elevator human detection system according to Embodiment 1. FIG. 1 is a block diagram showing a configuration of an elevator human detection system according to Embodiment 1. FIG. It is a table | surface which shows the specific example of the data shown in FIG. 3 is a flowchart showing an operation of the elevator human detection system according to the first embodiment.

Explanation of symbols

  100 person detection system, 101 thermal image capturing device, 102 image analysis device, 103 control device, 104 air conditioning device, 105 display device, 106 sound output device, 201 cage, 202 control room, 301 thermal image data, 302 in-car information, 303 operation information, 304 air conditioning control information, 305 content update information.

Claims (5)

A thermal imaging device that captures and transmits thermal images in the elevator car;
An image analysis device that determines whether the temperature in the car is maintained at a constant temperature by receiving and analyzing the thermal image from the thermal image capturing device;
A controller that generates and transmits air-conditioning control information instructing to adjust the temperature in the car when the image analysis apparatus determines that the temperature in the car is not maintained at a constant temperature;
Receiving air conditioning control information from the control device, and according to the received air conditioning control information, an air conditioning device for adjusting the air in the car,
The image analysis device detects passengers getting in and out of the car by comparing two thermal images successively received from the thermal image capturing device and analyzing a difference between the two thermal images. Elevator human detection system. The image analysis device counts the number of passengers in the car,
The control device performs operation control of the car, and generates and transmits guidance information for passengers according to the operation control state and the number of passengers counted by the image analysis device,
The elevator human detection system further comprises:
The elevator human detection system according to claim 1, further comprising an output device that receives guidance information from the control device and outputs the guidance information in the car.   The control device stores in advance a capacity of the car in a storage medium. When the car is stopped at the landing and the door of the car is open, the control device counts the information as guidance information. The elevator human detection system according to claim 2, wherein a message is generated and transmitted to notify a difference between the number of passengers and the number of cars stored in the storage medium.   When the car is at rest and the number of passengers counted by the image analysis device is one or more, the control device moves the car to a predetermined landing, opens the car door, and guides The elevator person detection system according to claim 2 or 3, wherein a message that prompts the user to get off the car is generated and transmitted as information.   The elevator according to any one of claims 1 to 4, wherein the output device is a display device that displays guidance information on a screen, a voice output device that outputs guidance information by voice, or a combination thereof. Human detection system.

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