JP2018063671A - Image sensor, crisis management system, sensing method, and crisis management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image sensor, a crisis management system, a sensing method, and a crisis management method capable of, in the case where a predetermined sensing target event that affects people is sensed, providing such information that a monitoring person can grasp circumstances of a site further accurately.SOLUTION: An image sensor of an embodiment includes an imaging unit, a spatial information acquisition unit, a sensor information transmission unit, and a setting changing unit. By imaging a target space, the imaging unit acquires image data of the target space. The spatial information acquisition unit acquires spatial information indicating an event concerning the target space on the basis of the image data. The sensor information transmission unit transmits, as sensor information of the self-device, the image data or the spatial information to another device. The setting changing unit changes the setting concerning acquisition or transmission of the sensor information in accordance with that a predetermined sensing target event that affects people has been sensed.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to an image sensor, a crisis management system, a detection method, and a crisis management method.

  Conventionally, in buildings where toxic gas may be generated, a gas detector that detects toxic gas and an alarm device that alerts people in the hall and gives evacuation instructions in the event of a gas leak, etc. It is generally provided. However, in crisis management using equipment such as gas detectors and gas alarms, it is difficult to grasp the status of each site in the hall in the event of an emergency. For example, there were cases where it was not possible to find a person who was late to escape from each site or a person who had fallen into each site and was unable to move. In order to deal with such problems, attempts have been made to grasp the situation in the field using a surveillance camera. However, in order to grasp the situation using the surveillance camera, it is necessary for the surveillance staff to visually confirm the image (including the video) of the scene taken by the surveillance camera. Therefore, when a predetermined detection target event that affects humans, such as generation of harmful gas, is detected, there is a possibility that the monitoring staff cannot always accurately grasp the situation at the site.

JP 2014-204246 A

  The problem to be solved by the present invention is that it is possible to provide information that enables a monitoring person to grasp the situation on the site more accurately when a predetermined detection target event having an effect on a person is detected. An image sensor, a crisis management system, a detection method, and a crisis management method are provided.

  The image sensor according to the embodiment includes an imaging unit, a spatial information acquisition unit, a sensor information transmission unit, and a setting change unit. The imaging unit acquires image data of the target space by imaging the target space. The spatial information acquisition unit acquires spatial information indicating an event related to the target space based on the image data. The sensor information transmission unit transmits the image data or the spatial information to another device as sensor information of the device itself. The setting change unit changes the setting related to acquisition or transmission of the sensor information in response to detection of a predetermined detection target event that has an effect on a person.

1 is a diagram illustrating an outline of a crisis management system 100 according to a first embodiment. The figure which shows the specific example of the system configuration | structure of the crisis management system 100 of 1st Embodiment. FIG. 3 is a block diagram illustrating a specific example of a functional configuration of the image sensor 1 according to the first embodiment. The block diagram which shows the specific example of a function structure of the apparatus control apparatus 20 of 1st Embodiment. The block diagram which shows the specific example of a function structure of the crisis management apparatus 30 of 1st Embodiment. The figure which shows the specific example of the correspondence information in 1st Embodiment. The figure which shows the specific example of the map information in 1st Embodiment. The sequence diagram which shows the specific example of the crisis management process performed by the crisis management apparatus 30 of 1st Embodiment. The block diagram which shows the specific example of a function structure of the crisis management apparatus 30a of 2nd Embodiment. The figure which shows the specific example of the method of detecting the person who has fallen in the building in 2nd Embodiment. The figure which shows the specific example of the method of selecting the evacuation route from the generation | occurrence | production location to the evacuation exit in 2nd Embodiment. The figure which shows the specific example of the method of controlling the lighting installation 22 according to the evacuation route in 2nd Embodiment.

  Hereinafter, an image sensor, a crisis management system, a detection method, and a crisis management method according to embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating an outline of a crisis management system 100 according to the first embodiment. The management object of the crisis management system 100 is a building such as a laboratory where toxic gas may be generated. In such a building, in addition to normal building equipment (for example, lighting equipment and air conditioning equipment), Equipment such as a gas detector that detects toxic gas and an alarm device for alerting and evacuating instructions due to the generation of toxic gas will be installed. For example, the floor A shown in FIG. 1 is an example of a space in a building to be managed by the crisis management system 100, and the image sensors 1-1 and 1-2, the air conditioner 21-1 and the ceiling are on the ceiling. 21-2, lighting facilities 22-1 and 22-2, gas detectors 3-1 and 3-2, and alarm devices 4-1 and 4-2 are installed. Hereinafter, unless it is particularly necessary to distinguish, the image sensors 1-1 and 1-2 are the image sensor 1, the air conditioning facilities 21-1 and 21-2 are the air conditioning facilities 21, and the lighting facilities 22-1 and 22-2 are the lighting facilities. 22, gas detectors 3-1 and 3-2 are described as gas detector 3, and alarm devices 4-1 and 4-2 are described as alarm device 4, respectively.

  The image sensor 1 acquires the image data of the target space by imaging the imaging target space (hereinafter referred to as “target space”). The image sensor 1 acquires spatial information indicating various events related to the target space based on the acquired image data. For example, in the example of FIG. 1, A1 is shown as the target space of the image sensor 1-1, and A2 is shown as the target space of the image sensor 1-2. The image sensor 1 transmits the acquired image data and spatial information to a device control device and a crisis management device (not shown).

  The equipment control device is a device that controls normal building equipment such as lighting equipment and air conditioning equipment. For example, the device control apparatus may be realized by a system such as a BEMS (Building Energy Management System) or a BAS (Building Automation System). The equipment control device controls various building equipment based on the spatial information acquired from the image sensor 1 so that each target space is maintained in a desired state.

  The crisis management device is a device that performs processing such as generation and display of various information (hereinafter referred to as “crisis management information”) that supports crisis management in a building. The crisis management device generates crisis management information based on the spatial information acquired from the image sensor 1. For example, the crisis management device transmits the generated crisis management information to a device such as a monitoring terminal or an alarm device 4 operated by a building supervisor or the like. By transmitting such crisis management information, for example, the monitoring person can grasp the state of crisis management in the building by confirming the crisis management information displayed on the monitoring terminal. In addition, the crisis management information may be provided not only to the monitoring staff but also to the refugees in the building. For example, a person in a building can grasp the state of crisis management in the building based on information notified by the alarm device 4. The alarm device 4 may notify the crisis management information by voice, or may notify the crisis management information by display on a display or the like.

  The gas detector 3 is a sensor that detects toxic gas. When the gas detector 3 detects the toxic gas, the gas detector 3 transmits a gas detection notification indicating that the toxic gas has been detected to each image sensor 1 and the crisis management device. The gas detector 3 is not limited to one that detects a toxic gas as long as it detects an event related to a gas that may adversely affect the human body. For example, the gas detector 3 may detect that the concentration of oxygen necessary for the human body has decreased to a predetermined value or less. In this case, the gas detector 3 may transmit the gas detection notification as a notification indicating a decrease in oxygen concentration.

  The alarm device 4 receives the crisis management information from the crisis management device, and performs an operation of notifying various information indicated by the received crisis management information to the surroundings. For example, the alarm device 4 may notify the information by voice, or may notify the information by turning on / off the lamp, displaying using a display device, or the like.

  FIG. 2 is a diagram illustrating a specific example of the system configuration of the crisis management system 100 according to the first embodiment. The crisis management system 100 includes one or more image sensors 1, a building device 2, a gas detector 3 and an alarm device 4, a device control device 20, a crisis management device 30 (crisis management unit), and a monitoring terminal 40. The building equipment 2 represents normal building equipment such as the air conditioning equipment 21 and the lighting equipment 22. The image sensor 1, the building equipment 2, the gas detector 3, the alarm device 4, the equipment control device 20, the crisis management device 30, and the monitoring terminal 40 are connected to the network 50 and can communicate with each other via the network 50. In FIG. 2, as an example of one or more image sensors 1, building equipment 2, gas detector 3, and alarm device 4, image sensors 1-1 to 1-K, building equipment 2-1 to 2-L, gas detection are shown. Devices 3-1 to 3-M and alarm devices 4-1 to 4-N are shown. Here, K, L, M, and N are each an integer of 1 or more.

  FIG. 3 is a block diagram illustrating a specific example of a functional configuration of the image sensor 1 according to the first embodiment. The image sensor 1 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes an image sensor program. The image sensor 1 functions as a device including a communication unit 101, an imaging unit 102, a storage unit 103, a spatial information acquisition unit 104, a sensor information transmission unit 105, and a setting change unit 106 by executing an image sensor program. Note that all or part of the functions of the image sensor 1 may be realized using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). The image sensor program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The image sensor program may be transmitted via a telecommunication line.

  The communication unit 101 is configured using a communication interface for connecting the own apparatus to the network 50. The communication unit 101 communicates with various devices constituting the crisis management system 100 via the network 50.

  The imaging unit 102 is configured using an imaging device such as a camera. The imaging unit 102 is installed at a position and orientation where the target space can be imaged, and acquires image data obtained by imaging the target space by an imaging operation at the installation position. The imaging unit 102 stores the acquired image data in the storage unit 103.

  The storage unit 103 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The storage unit 103 stores the image data acquired by the imaging unit 102.

  The spatial information acquisition unit 104 acquires spatial information related to the target space based on the image data of the target space acquired by the imaging unit 102. Specifically, the spatial information acquisition unit 104 includes a person information acquisition unit 111 and an environment information acquisition unit 112. The person information acquisition unit 111 acquires person information based on the image data of the target space. The person information is information about a person in the target space. For example, the person information is information indicating the presence or absence of a person in the target space, the amount of activity, the number of people, the degree of congestion, the moving direction, and the like. The environment information acquisition unit 112 acquires environment information based on the image data of the target space. The environmental information is information related to a person other than the person in the target space. For example, the environment information is information indicating the brightness and layout of the target space. The spatial information acquisition unit 104 acquires the person information acquired by the person information acquisition unit 111 and the environment information acquired by the environment information acquisition unit 112 as the spatial information, and the acquired spatial information is the sensor information transmission unit 105. Output to.

  The sensor information transmission unit 105 transmits the image data acquired by the imaging unit 102 or the spatial information acquired by the spatial information acquisition unit 104 to the device control device 20 and the crisis management device 30 as sensor information of the own device.

  The setting change unit 106 can receive a gas detection report via the communication unit 101, and changes settings related to acquisition or transmission of sensor information in response to the reception of the gas detection report. Specifically, the setting change unit 106 changes settings related to the operation of the imaging unit 102, the spatial information acquisition unit 104, or the sensor information transmission unit 105. For example, the setting change unit 106 is configured to be able to change camera parameters such as a frame rate, a gain, a shutter speed, and a dynamic range as settings related to the operation of the imaging unit 102. For example, the setting change unit 106 may be configured to be able to change the power supply state (ON or OFF) of the imaging unit 102.

  In addition, for example, the setting change unit 106 sets the range of the image used for acquiring the spatial information, the sensitivity of the process for acquiring the spatial information (hereinafter referred to as “processing sensitivity”), as the settings related to the operation of the spatial information acquisition unit 104. The configuration such as the type of information to be acquired as the spatial information can be changed. The processing sensitivity here is a set value that determines the granularity and range of information acquired as spatial information. For example, when detecting the motion of the subject based on the inter-frame difference of the image, the processing sensitivity is a difference amount threshold value that divides the determination result of the presence or absence of motion.

  In addition, for example, the setting change unit 106 is configured to be able to change settings such as the type of information to be transmitted as sensor information and whether or not to transmit sensor information as settings related to the operation of the sensor information transmission unit 105. The For example, when the gas detection notification is received, the setting changing unit 106 changes the setting so that the spatial information necessary for generating the crisis management information is transmitted as sensor information (an example of the second setting). Alternatively, the setting may be changed so that image data for visual confirmation is transmitted as sensor information (an example of a second setting). On the other hand, when the gas detection notification has not been received, the setting change unit 106 may change the setting so that these pieces of information are not transmitted (an example of the first setting). For example, the setting change unit 106 is configured to transmit only spatial information necessary for realizing energy saving such as lighting and air conditioning when the gas detection notification is not received (first setting). For example, the setting may be changed.

  Hereinafter, a specific example of the spatial information acquired in the crisis management system 100 of the first embodiment will be described. The spatial information acquisition unit 104 of the image sensor 1 in the first embodiment acquires information about a person in the target space as spatial information based on the image data in response to the detection of toxic gas in the building. More specifically, the spatial information acquisition unit 104 acquires at least a part or all of the escape delay information, the fall information, and the congestion degree as the spatial information.

(1) Escape delay information Escape delay information is information indicating the presence or absence of a person who is delayed in the target space. Specifically, the space information acquisition unit 104 detects the presence or absence of a person who is late, based on the presence or absence of a person's movement in the target space. In this case, the human information acquisition unit 111 detects the presence or absence of human movement in the target space. For example, the person information acquisition unit 111 detects the presence / absence of a person's movement based on the inter-frame difference of image data acquired continuously. The person information acquisition unit 111 determines that there is a person who is late to escape if a person's movement in the target space is detected, and no person is late to escape if no person's movement is detected. Is determined.

(2) Fall information The fall information is information indicating the presence or absence of a person who has fallen in the target space. Specifically, the spatial information acquisition unit 104 detects the presence or absence of a person who has fallen based on the presence or absence of a stationary person (hereinafter referred to as “stationary person”) in the target space. In this case, the presence / absence of a still person in the target space is detected by the person information acquisition unit 111. For example, the person information acquisition unit 111 detects the presence or absence of a still person based on a change in background difference or a change in edge distribution between consecutively acquired image data. Specifically, the person information acquisition unit 111 detects an area where a background difference or a change in edge distribution is large as an area where a still person is imaged. The person information acquisition unit 111 determines that there is a fallen person when a still person in the target space is detected, and determines that there is no fallen person when no still person is detected.

  In such a detection of a still person based on a background difference or a change in edge distribution, a person who falls down in a place where no other object exists can be detected more effectively. Therefore, the person information acquisition unit 111 may detect a stationary person only for an area where the luminance change is small, such as a passage. For example, in this case, the person information acquisition unit 111 identifies areas on the desk or the like that have a large luminance change other than the person based on information such as the floor layout, so that the luminance change of these areas is not detected as the luminance change of the person. In addition, these regions may be masked.

  Further, for example, the person information acquisition unit 111 may detect a person who has fallen in the target space by pattern recognition of the image data. In this case, the person information acquisition unit 111 learns the feature amount of the image of the person who has fallen in advance, and compares the feature amount of the image to be detected with the feature amount of the learned image, thereby detecting the feature amount. Detects a person who has fallen from the target image. As the feature amount extracted from the image, a feature amount related to luminance change such as a cumulative difference may be used, or a feature amount related to luminance distribution such as CoHOG (Co-occurrence Histograms of Oriented Gradients) may be used. . In addition, as a method for identifying a person based on the feature amount, a method such as a neural network, a support vector machine (SVM), a k-neighbor discriminator, or a Bayes classification may be used.

(3) Congestion degree The congestion degree is information indicating the degree of crowded people in the target space. Specifically, the spatial information acquisition unit 104 estimates the degree of congestion in the target space based on the distribution of human motion detected in the target space. In this case, the person information acquisition unit 111 estimates the degree of congestion in the target space. For example, the person information acquisition unit 111 detects a person's movement from the image data of the target space in the same manner as the acquisition of escape delay information. The person information acquisition unit 111 estimates the degree of congestion of the target space based on the distribution of the area where the movement of the person is detected.

  FIG. 4 is a block diagram illustrating a specific example of a functional configuration of the device control apparatus 20 according to the first embodiment. The device control device 20 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes a program. The device control apparatus 20 functions as a device including a communication unit 201, a storage unit 202, a sensor information acquisition unit 203, and a device control unit 204 by executing a program. Note that all or part of the functions of the device control apparatus 20 may be realized using hardware such as an ASIC, PLD, or FPGA. The program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The program may be transmitted via a telecommunication line.

  The communication unit 201 is configured using a communication interface for connecting the own apparatus to the network 50. The communication unit 201 communicates with various devices constituting the crisis management system 100 via the network 50.

  The storage unit 202 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The storage unit 202 stores sensor information. Specifically, the sensor information is image data and spatial information acquired from the image sensor 1. The storage unit 202 stores the acquired sensor information in association with the image sensor 1 that acquired the sensor information.

  The sensor information acquisition unit 203 acquires sensor information from each image sensor 1. The sensor information acquisition unit 203 causes the storage unit 202 to store the acquired sensor information.

  The device control unit 204 controls the various building devices 2 based on the spatial information acquired from each image sensor 1. For example, the device control unit 204 may perform control to turn off the air conditioning equipment 21-1 when the person information indicates that no person exists in the target space A1, and the brightness of the target space A2 is the environmental information. You may perform control which reduces the brightness of the lighting equipment 22-2, when showing that it is higher than a target value. The device control unit 204 is not limited to the above control example, and may perform any control as long as the control value can be determined based on the spatial information. In addition, the device control unit 204 is not limited to the air conditioning facility 21 and the lighting facility 22 and may be any device as long as it can be controlled based on spatial information.

  FIG. 5 is a block diagram illustrating a specific example of a functional configuration of the crisis management apparatus 30 according to the first embodiment. The crisis management device 30 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes a program. The crisis management device 30 functions as a device including a communication unit 301, a storage unit 302, a sensor information acquisition unit 303, a gas detection notification reception unit 304, and a crisis management processing unit 305 by executing a program. All or some of the functions of the crisis management device 30 may be realized using hardware such as an ASIC, a PLD, or an FPGA. The program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The program may be transmitted via a telecommunication line.

  The communication unit 301 is configured using a communication interface for connecting the own apparatus to the network 50. The communication unit 301 communicates with various devices constituting the crisis management system 100 via the network 50.

  The storage unit 302 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The storage unit 302 stores sensor information and correspondence information. The correspondence information is information indicating a correspondence relationship between each image sensor 1 and the alarm device 4. The storage unit 202 stores correspondence information in advance.

  The sensor information acquisition unit 303 acquires sensor information from each image sensor 1. The sensor information acquisition unit 303 stores the acquired sensor information in the storage unit 302.

  The gas detection notification receiving unit 304 receives a gas detection notification from the gas detector 3. The gas detection notification receiving unit 304 notifies the crisis management processing unit 305 that the gas detection notification has been received.

  The crisis management processing unit 305 executes processing related to crisis management in the building (hereinafter referred to as “crisis management processing”) in response to the notification that the gas detection notification has been received. Specifically, the crisis management processing unit 305 identifies the image sensor 1 corresponding to the gas detector 3 that has detected the toxic gas based on the correspondence information, and the image data or space acquired by the identified image sensor 1. Crisis management information is generated based on the information. The crisis management processing unit 305 executes various crisis management processes based on the generated crisis management information. In addition, the crisis management processing unit 305 generates and transmits screen information for displaying the generated crisis management information in a predetermined manner to a display device such as the monitoring terminal 40 that can display information.

  FIG. 6 is a diagram illustrating a specific example of correspondence information according to the first embodiment. For example, the correspondence information is stored in the storage unit 302 as the correspondence table 310 illustrated in FIG. The correspondence table 310 has a correspondence record for each detector ID. The correspondence record has each value of detector ID, alarm device ID, control group ID, image sensor ID, and illumination ID. The detector ID is identification information of the gas detector 3. The alarm device ID is identification information of the alarm device 4. The control group ID is control group identification information. The control group is a group of building devices 2 defined with respect to the control of a plurality of building devices 2. For example, the control group is used as a control unit when the equipment control device 20 or the crisis management device 30 controls a plurality of building equipment 2. The image sensor ID is identification information of the image sensor 1. The illumination ID is identification information of the illumination facility 22. For example, in the correspondence table 310 of FIG. 6, the gas detector 3 identified by “D1” belongs to the control group identified by “G1”, and the alarm group 4 identified by “A1” is included in the control group. And the image sensor 1 identified by “S1” and the lighting equipment 22 identified by “L1” belong to each other. Note that the correspondence information held as the correspondence table 310 of FIG. 6 may be held in the form of a map as shown in FIG. 7 by combining with the position information of each device.

  FIG. 7 is a diagram showing a specific example of correspondence information (hereinafter referred to as “map information”) held in the form of a map. FIG. 7 shows map information in which one image sensor 1, gas detector 3, and alarm device 4 are associated with each of four control groups composed of four adjacent lighting facilities 22. Yes. The map information may include position information indicating various layouts of the floor in addition to position information of each device such as the image sensor 1, the building device 2, the gas detector 3, and the alarm device 4. For example, as in the example of FIG. 7, the map information may include the position information of the evacuation exit when toxic gas is detected.

  FIG. 8 is a sequence diagram illustrating a specific example of the crisis management process executed by the crisis management apparatus 30 according to the first embodiment. First, each image sensor 1 acquires image data of a target space corresponding to each installation position (step S101). Each image sensor 1 acquires the spatial information of the target space based on the acquired image data (step S102). Each image sensor 1 transmits the acquired image data and spatial information to the crisis management device 30 (step S103).

  The crisis management device 30 receives image data and spatial information transmitted from each image sensor 1. The crisis management apparatus 30 stores the image data and the spatial information acquired from each image sensor 1 in association with the image sensor 1 that is the acquisition source (step S104).

  Here, for the sake of space, only one step of steps S101 to S104 is shown. However, in actuality, each image sensor 1 repeatedly executes the processing of steps S101 to S103 at a predetermined cycle to manage the crisis. The apparatus 30 repeatedly executes step S104 in accordance with the execution of step S103 by each image sensor 1.

  On the other hand, when toxic gas is detected by the gas detector 3, the alarm device 4 transmits a gas detection notification to the crisis management device 30 (step S105). This gas detection notification includes the alarm device ID of the alarm device 4 that transmitted the notification. The crisis management processing unit 305 of the crisis management device 30 identifies the location where toxic gas is generated (hereinafter referred to as “occurrence location”) based on the alarm device ID included in the received gas detection notification (step S106). Hereinafter, the crisis management device 30 executes various crisis management processes based on the identified occurrence location and the image data or the spatial information acquired from each image sensor 1.

  First, the crisis management processing unit 305 generates crisis management information indicating the degree of congestion in the building. Specifically, the crisis management processing unit 305 acquires space information indicating the degree of congestion of each target space from each image sensor 1. The crisis management processing unit 305 generates information indicating the degree of congestion of the entire building (hereinafter referred to as “congestion degree information”) based on the degree of congestion of each target space and the correspondence information (step S107). The crisis management processing unit 305 distributes the congestion degree information thus generated to the monitoring terminal 40 as crisis management information (step S108). By distributing such crisis management information to the monitoring terminal 40 in response to detection of toxic gas, the monitoring staff can promptly alert and evacuate the people in the building. .

  Subsequently, the crisis management processing unit 305 acquires the image data and spatial information near the identified occurrence location from the storage unit 302 (step S109). At this time, the crisis management processing unit 305 determines the image sensor 1 that has acquired the image data and the spatial information to be acquired from the storage unit 302 based on the alarm ID of the gas detector 3 that has detected the toxic gas and the corresponding information. Identify.

  The crisis management processing unit 305 distributes the acquired image data and spatial information in the vicinity of the occurrence location to the monitoring terminal 40 as crisis management information (step S110). By distributing such crisis management information to the monitoring terminal 40, the monitoring staff can quickly confirm the situation near the location where the toxic gas is detected in response to the detection of the toxic gas. Hereinafter, transmission of crisis management information in the vicinity of the occurrence location in response to the detection of toxic gas in this way is referred to as “specific delivery”.

  Subsequently, the crisis management processing unit 305 determines whether or not to shift the distribution of the crisis management information from the specific distribution to the cyclic distribution (step S111). In the cyclic distribution, the distribution of the crisis management information in step S110 is the image data and the spatial information acquired by the image sensor 1 in the vicinity of the occurrence location, whereas the image data of the image sensor 1 existing in a wider range is used. It is distributed cyclically. That is, when image data is distributed by specific distribution, for example, the monitoring staff can preferentially find a person who has fallen near the place of occurrence. In addition, by distributing the image data by patrol delivery, the supervisor can confirm the evacuation situation at the site in a wider range, and can preferentially find the person who is lagging away from the place of occurrence. .

  It should be noted that the determination as to whether or not to shift to the cyclic distribution may be made based on any conditions, but in general, it is preferable to shift after confirmation of the vicinity of the occurrence location is sufficient. Here, the fact that the vicinity of the occurrence location has been sufficiently confirmed may be determined based on, for example, an input by a user such as a monitor. In this case, the crisis management processing unit 305 may be configured to shift the distribution of the crisis management information to the cyclic distribution in response to the input of the distribution method switching instruction. Moreover, it may be determined based on the elapsed time after the specific delivery is started that the vicinity of the occurrence location is sufficiently confirmed. In this case, the crisis management processing unit 305 is configured to count the elapsed time after the start of the specific distribution and shift the distribution of the crisis management information to the cyclic distribution when the elapsed time exceeds a predetermined threshold time. May be.

  When it is determined that the conditions for transition to the cyclic distribution are not satisfied (step S111—NO), the crisis management processing unit 305 repeatedly executes step S111 until the transition conditions are satisfied. On the other hand, when it is determined that the condition for transition to the cyclic distribution is satisfied (step S111—YES), the crisis management processing unit 305 acquires the image data and the space acquired by the image sensor 1 existing in a wider range than the specific distribution. Information is acquired from the storage unit 302 (step S112). The crisis management processing unit 305 uses the acquired image data and space information as crisis management information, and distributes the crisis management information so as to go around each target space (step S113).

  Note that the spatial information acquired by the image sensor 1 does not necessarily have to be information (second spatial information) that always indicates an event related to crisis management (for example, escape delay, fall, congestion degree, etc.). The image sensor 1 may acquire information (first spatial information) indicating an event other than an event related to crisis management as the spatial information in a situation where no toxic gas is detected. For example, in a situation where no toxic gas is detected, the image sensor 1 uses, as spatial information, information indicating events (such as brightness and temperature) related to control of various devices (such as lighting facilities and air conditioning facilities) in a building. You may get it. In this case, the image sensor 1 may be configured to switch the acquired spatial information from the first spatial information to the second spatial information in response to the detection of the toxic gas. Further, the image sensor 1 may be configured to switch the information to be acquired in accordance with the evacuation situation in the building in the acquisition of the second spatial information. For example, the image sensor 1 may be configured to acquire the degree of congestion immediately after toxic gas is detected and to acquire escape delay information after the start of evacuation. Further, the image sensor 1 may be configured to acquire fall information in a situation where evacuation has progressed to some extent.

  Furthermore, the image sensor 1 may be configured to change the type and priority of information to be acquired as the second spatial information in accordance with a change in the risk level at each point in the building. In this case, for example, the crisis management processing unit 305 of the crisis management device 30 determines the risk level of each point based on image data or spatial information acquired from each image sensor 1. The crisis management processing unit 305 notifies the degree of risk determined for each point to the image sensor 1 in the vicinity of the point where the degree of risk is determined. For example, the degree of risk is determined based on the concentration of toxic gas at each point. In this case, the concentration of the toxic gas at each point may be acquired in accordance with the detection cycle of the gas detector 3, or may be estimated based on the gas diffusion rate. The crisis management processing unit 305 determines the risk taking into account the distance and moving speed between evacuating persons, the position and moving speed of the elevator used for evacuation, in addition to the concentration of toxic gas at each point. May be.

  In this case, since the image sensor 1 gives priority to evacuation from the place of occurrence, the image sensor 1 may be configured to preferentially acquire the congestion level, for example, when the danger level near the own device is high. Further, the image sensor 1 may be configured to preferentially acquire escape delay information when, for example, the risk level is medium in order to prioritize discovery of a person who has escaped. In addition, the image sensor 1 may be configured to preferentially acquire the fall information when the degree of danger is low, for example, in order to give priority to the discovery of the fallen person. Furthermore, the image sensor 1 may change the acquisition frequency and acquisition cycle of each information according to the degree of risk.

  The crisis management system 100 according to the first embodiment configured as described above can deliver crisis management information according to priority in accordance with the generation of toxic gas. Specifically, immediately after the occurrence of toxic gas, the crisis management system 100 delivers crisis management information indicating the degree of congestion in the building with evacuation from the generation site as the highest priority. Subsequently, the crisis management system 100 distributes image data or spatial information in the vicinity of the gas leak occurrence site to the monitoring terminal 40 as crisis management information (specific distribution). With this specific distribution, the monitoring staff can quickly and intensively find a person who has been directly affected by the gas leak and has fallen near the site. Furthermore, after performing specific distribution, the crisis management system 100 switches the distribution method of crisis management information to cyclic distribution. With this patrol delivery, the supervisor can grasp a wider range of evacuation situations and focus on finding people who are late to escape from the gas leak occurrence site. By providing such a configuration, the crisis management system 100 allows the supervisor to more appropriately monitor the evacuation situation of a person when toxic gas is generated based on the images of the target space acquired by the plurality of image sensors 1. Information necessary for grasping can be provided at an appropriate timing according to the evacuation situation.

(Second Embodiment)
FIG. 9 is a block diagram illustrating a specific example of a functional configuration of the crisis management apparatus 30a according to the second embodiment. The crisis management device 30a differs from the crisis management device 30 of the first embodiment in that a crisis management processing unit 305a is provided instead of the crisis management processing unit 305. In the following description, among the functional units included in the crisis management device 30a, the same functional units as those in the crisis management device 30 of the first embodiment are denoted by the same reference numerals as those in FIG.

The crisis management processing unit 305a further includes the following functions in addition to the functions included in the crisis management processing unit 305 in the first embodiment.
[1. Fall detection function]
The crisis management processing unit 305a detects a person who has fallen in the building based on the spatial information acquired from the plurality of adjacent image sensors 1. FIG. 10 shows an example of a specific method for the crisis management processing unit 305a to detect a person who has fallen in the building.

  FIG. 10 is a diagram illustrating a specific example of a method for detecting a person who has fallen in a building according to the second embodiment. FIGS. 10A, 10B, and 10C show the positional relationship of person information (information indicating the presence or absence of a person) acquired by a plurality of image sensors 1 near the occurrence location in the target space. FIG. In the examples of FIG. 10A, FIG. 10B, and FIG. 10C, person information about nine adjacent target spaces 401-1 to 401-9 is shown. The person information shown in FIG. 10A and FIG. 10B is acquired in the order of FIG. 10A and FIG. 10B, and no fallen person is detected in any target space. The example of the person information in a case is shown. The personal information shown in FIGS. 10A and 10C is acquired in the order of FIGS. 10A and 10C, and a person who has fallen down in the target space 401-5. The example of the person information in the case of being detected is shown.

  In FIGS. 10A, 10B, and 10C, the shaded target space represents a target space where human movement is detected (hereinafter referred to as “present area”), and is shaded. The target space that is not represented represents a target space in which no human movement is detected (hereinafter referred to as “absent area”). FIG. 10A shows that a person A who is evacuating (moving) is detected in the target space 401-5, and FIG. 10B is a case where the person A being evacuated is detected in the target space 401-4. It represents that. On the other hand, FIG. 10C shows that no evacuating person is detected in any target space.

  For example, when the person information shown in FIG. 10B is acquired after the person information shown in FIG. 10A, that is, in the vicinity of the target space 401-5 that has changed from the existing area to the absent area. When the area exists, the crisis management processing unit 305a considers that the person A has moved from the target space 401-5 to the target space 401-4, and determines that no person has fallen into any target space.

  On the other hand, when the person information shown in FIG. 10C is acquired following the person information shown in FIG. 10A, that is, in the vicinity of the target space 401-5 that has changed from the existing area to the absent area. When the area does not exist, the crisis management processing unit 305a determines that the person A has fallen in the target space 401-5, and determines that the person A has fallen in the target space 401-5.

  In the example of FIG. 10, the method of detecting a person who has fallen on the basis of images acquired by the plurality of image sensors 1 has been described. However, the crisis management processing unit 305 a is acquired by a single image sensor 1. Based on the image, a person who has fallen into the target space may be detected by the same method as described above. For example, the crisis management processing unit 305a sets a plurality of areas such as the target spaces 401-1 to 401-9 in FIG. 10 in one image, and sets each area based on the person information of the person in each set area. You may detect a person who has fallen. Further, the fall detection function based on one image as described above may be provided in each image sensor 1 instead of the crisis management device 3. In this case, each image sensor 1 may transmit the detection result of the fallen person as personal information to the crisis management device 3. The region here also includes one pixel (pixel) of an image captured by one image sensor. Furthermore, the area | region here may be set in multiple, and the position and size of an area | region may be changed with the position and size of a person even if it is not fixed.

  Moreover, in the above detection method, there is a possibility that a fallen person is erroneously detected. For example, assuming a situation where a person detected near an evacuation exit in a building subsequently exits the evacuation exit from the building, the target space in which the person was detected changes from an existing area to an absent area. A situation may occur where the surrounding target space remains an absent area. In this case, it may be determined that the detected person has fallen around the evacuation exit despite being evacuated outside the building. Therefore, the crisis management processing unit 305a may be configured to determine the validity of the detection result according to the attribute associated with each target space and output only the detection result determined to be valid. . For example, when each target space is associated with each position information, the crisis management processing unit 305a may be configured to exclude the target space around the evacuation exit from the detection target of the fallen person. . With this configuration, the crisis management processing unit 305a can detect a person who has fallen more accurately.

[2. Function to select evacuation route]
The crisis management processing unit 305a selects an evacuation route from the place of occurrence to the evacuation exit based on the spatial information acquired from the plurality of image sensors 1. Specifically, the crisis management processing unit 305a selects an evacuation route based on the distribution of the degree of congestion acquired from each image sensor 1. The crisis management processing unit 305a may generate crisis management information indicating the selected evacuation route and distribute the generated crisis management information to the monitoring terminal 40.

  FIG. 11 is a diagram illustrating a specific example of a method for selecting an evacuation route from an occurrence place to an evacuation exit according to the second embodiment. 11A shows a display example of crisis management information indicating the degree of congestion, and FIG. 11B shows a display example of crisis management information indicating the evacuation route. The display example of FIG. 11A is obtained by displaying the degree of congestion acquired by each image sensor 1 in association with the target space of each image sensor. The crisis management processing unit 305a selects an evacuation route by selecting an area with a low congestion level based on the distribution of the congestion level displayed in this way. For example, when the congestion degree distribution as shown in FIG. 11A is obtained, the crisis management processing unit 305a selects one of the refugee groups B1 to B3 indicated by the respective congestion degree displays. The evacuation routes R1 to R3 to the evacuation exit are respectively selected. The crisis management processing unit 305a may determine an evacuation route by selecting a point with a low risk level based on the risk level acquired for each point.

[3. Function to control building equipment according to crisis management]
In response to the detection of toxic gas, the crisis management processing unit 305a controls the operation of each building device 2 so that each building device 2 performs an operation for supporting crisis management associated with the generation of toxic gas. For example, the crisis management processing unit 305a controls the lighting equipment 22 in response to detection of toxic gas so that the image sensor 1 can acquire image data or spatial information with higher accuracy. Adjust the brightness.

  For example, the crisis management processing unit 305a turns on all the lighting facilities 22 while a process of detecting a person's movement or person from the image data or an operation such as visual confirmation of the image is being performed. Control may be performed to ensure the brightness. In addition, the crisis management processing unit 305a may perform control to dimm the lighting equipment 22 after the completion of each processing and work such as visual confirmation.

  Further, for example, the crisis management processing unit 305a may control the lighting equipment 22 so as to ensure the brightness of an area in the building that is determined to require attention (hereinafter referred to as “attention area”). . For example, the caution area may be an area in the vicinity of the location where the toxic gas is generated, or an area on the evacuation route in a dangerous state. The crisis management processing unit 305a may control the lighting equipment 22 so that the brightness of such a caution area increases, or the lighting equipment so as to perform an operation of notifying the refugee that the caution area is required. 22 may be controlled. For example, the notification that it is a region requiring attention may be realized by changing the illumination color, blinking the illumination, or the like. In this case, the crisis management processing unit 305a may control the brightness of the lighting equipment 22 so that the area farther from the area requiring attention becomes darker.

  For example, the crisis management processing unit 305a may control the lighting equipment 22 according to the selected evacuation route. For example, the crisis management processing unit 305a may control the brightness of the lighting equipment 22 so as to become brighter from the place of occurrence to the evacuation exit in the evacuation route. The crisis management processing unit 305a may perform control such that the lighting equipment 22 is toned with a color corresponding to the safety level. For example, the crisis management processing unit 305a may perform control such that the lighting equipment 22 in the vicinity of the occurrence location is toned in red, or performs control such that the lighting equipment 22 along the evacuation route is toned in green. You may go. When there are a large number of lighting facilities 22, the crisis management processing unit 305 a may control the lighting state of each lighting facility 22 such that the evacuation route is indicated by the lighting states of the plurality of lighting facilities 22. For example, the crisis management processing unit 305a may control the lighting state of the plurality of lighting facilities 22 so that an arrow indicating an evacuation route is drawn.

  FIG. 12 is a diagram illustrating a specific example of a method for controlling the lighting equipment 22 according to the evacuation route in the second embodiment. In the example of FIG. 12, the crisis management processing unit 305a adjusts the lighting equipment 22 near the occurrence location to a color (for example, red) reminiscent of the danger as it is closer to the occurrence location, and the lighting equipment 22 near the evacuation exit. The closer to the evacuation exit, the lighter the color. Note that the control of the lighting equipment 22 according to the evacuation route may be realized by any operation that the lighting equipment 22 is capable of, such as dimming, turning on / off, and blinking, in addition to the color adjustment.

  In addition, for example, the crisis management processing unit 305a may control the air conditioning equipment 21 so that the concentration of the toxic gas in the building is lowered in response to the detection of the toxic gas. For example, the control of the air conditioning equipment 21 performed by the crisis management processing unit 305a may be control that suppresses diffusion of toxic gas, or may be control that promotes a decrease in toxic gas concentration by ventilation.

  In addition, for example, the crisis management processing unit 305a may generate crisis management information in a form that can be easily perceived visually by a user such as a monitor. For example, the crisis management processing unit 305a may generate crisis management information in which various types of information are displayed as a list, or may generate crisis management information in which various types of information are displayed superimposed on a map in a building. Good. Further, for example, the crisis management processing unit 305a may generate the crisis management information displayed in a different manner depending on the distance from the occurrence location. For example, the crisis management processing unit 305a may generate crisis management information displayed in a size or color according to the distance from the occurrence location.

  The crisis management system 100 of the second embodiment configured as described above has a crisis management processing unit 305a having a fall detection function, a function of selecting an evacuation route, and a function of controlling the building equipment 2 according to the crisis management. Is provided. By providing such a configuration, the crisis management system 100 according to the second embodiment can support the realization of more effective crisis management when toxic gas is generated.

  Hereinafter, modified examples of the crisis management system 100 will be described.

  The setting change unit 106 may be provided in the crisis management device 30 instead of being provided in the image sensor 1. In this case, the setting change unit provided in the crisis management apparatus 30 instructs each image sensor 1 to change the setting related to acquisition or transmission of sensor information in response to reception of the gas detection notification.

  In the above embodiment, the crisis management system 100 has been described assuming that the image sensor 1 is a device that acquires a color image similar to a general imaging device such as a camera. However, the image sensor included in the crisis management system 100 is described. 1 may be an apparatus that visualizes light having a wavelength different from that of light captured as a color image. For example, the image sensor 1 may acquire an image that visualizes infrared light, or may acquire an image that visualizes light of other wavelengths. Moreover, the image sensor 1 may acquire the image which visualized physical events other than light, such as a millimeter wave and a magnetic field. For example, the image sensor 1 may be realized by a visualization device such as MRI (Magnetic Resonance Imaging).

  In the above embodiment, the crisis management system 100 that manages a crisis caused by toxic gas has been described. However, the crisis that is managed by the crisis management system 100 is not necessarily limited to that caused by toxic gas. For example, a crisis to be managed by the crisis management system 100 may be caused by a gas (harmful gas) that may be harmful to a person. Further, for example, a crisis to be managed by the crisis management system 100 may be caused by an odor, a chemical substance, radioactivity, or the like. In this case, the crisis management system 100 may be replaced with various detectors capable of measuring odors, chemical substances, radioactivity, and the like instead of the gas detector 3. Such a detector may detect that the measured value exceeds or falls below a predetermined threshold, or detects that the measured value that satisfies the predetermined condition continues. There may be.

  The crisis management information provided by the crisis management system 100 may be information other than information that supports evacuation of evacuees as long as it is information that supports crisis management accompanying the generation of toxic gas. For example, the crisis management information may be information indicating the location of a safety device such as a gas mask. In this case, the crisis management processing unit 305 may generate crisis management information indicating the position of the gas mask present at the closest position in the direction away from the generation location of the toxic gas. In this case, the crisis management processing unit 305 further estimates the required number of gas masks based on the degree of congestion notified from each image sensor 1, and an appropriate number of evacuees are found at a plurality of points where the gas masks exist. Crisis management information that may be guided may be generated.

  According to at least one embodiment described above, the image sensor 1 according to the embodiment detects the toxic gas by the gas detector 3 that detects the toxic gas. By having the spatial information acquisition unit 104 that acquires information about a person as the spatial information, it is possible to provide information that allows a monitoring person to grasp the situation on the site more accurately.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 ... Crisis management system, 1 ... Image sensor, 101 ... Communication part, 102 ... Imaging part, 103 ... Memory | storage part, 104 ... Spatial information acquisition part, 105 ... Sensor information transmission part, 106 ... Setting change part, 111 ... Person information Acquisition unit, 112 ... environmental information acquisition unit, 2 ... building equipment, 3 ... gas detector, 4 ... alarm, 20 ... device control device, 201 ... communication unit, 202 ... storage unit, 203 ... sensor information acquisition unit, 204 ... equipment control unit, 21 ... air conditioning equipment, 22 ... lighting equipment, 30, 30a ... crisis management device, 301 ... communication part, 302 ... storage part, 303 ... sensor information acquisition part, 304 ... gas detection report receiving part, 305, 305a ... Crisis management processing unit, 310 ... correspondence table, 40 ... monitoring terminal, 50 ... network, 401 ... target space

Claims (20)

An imaging unit that acquires image data of the target space by imaging the target space;
A spatial information acquisition unit that acquires spatial information indicating an event related to the target space based on the image data;
A sensor information transmitting unit that transmits the image data or the spatial information to another device as sensor information of the device;
A setting changing unit that changes a setting related to acquisition or transmission of the sensor information in response to detection of a predetermined detection target event that has an influence on a person;
An image sensor comprising: The setting change unit detects the detection target event from a first setting used in a situation where the detection target event is not detected in response to the detection target event being detected. Switch to the second setting used in the situation,
The image sensor according to claim 1. The spatial information acquisition unit switches the type or priority of the spatial information acquired in the second setting based on the degree of risk notified in response to detection of the detection target event.
The image sensor according to claim 2. The spatial information acquisition unit estimates a degree of congestion of a person in the target space based on the image data.
The image sensor according to any one of claims 1 to 3. The spatial information acquisition unit determines the presence or absence of a person in a plurality of areas in each image based on continuously acquired image data, and the target based on a change in the presence or absence of a person in each area Detect that a person has fallen in space,
The image sensor according to any one of claims 1 to 4. The spatial information acquisition unit determines the validity of the detection result of the human fall in each of the plurality of regions based on attributes associated with each of the plurality of regions.
The image sensor according to claim 5. The imaging unit generates an image that visualizes light having a wavelength other than light that is captured as a color image.
The image sensor as described in any one of Claim 1 to 6. An imaging unit that acquires image data of the target space by imaging the target space;
A spatial information acquisition unit that acquires spatial information indicating an event related to the target space based on the image data;
A sensor information transmitter that transmits the image data or the spatial information as sensor information;
A setting changing unit that changes a setting related to acquisition or transmission of the sensor information in response to detection of a predetermined detection target event that has an influence on a person;
Crisis management system with In response to detection of the detection target by a detector, crisis management information for generating crisis management information for supporting crisis management associated with the occurrence of the detection target event based on the sensor information,
A storage unit that stores correspondence information indicating a correspondence relationship between the detector and the imaging unit;
Further comprising
The crisis management unit identifies an imaging unit corresponding to a detector that has detected a detection target event based on the correspondence information, and based on the sensor information acquired by the identified imaging unit and spatial information acquisition unit Generating crisis management information,
The crisis management system according to claim 8. The crisis management unit determines the risk level of each point due to the detected detection target event based on the detection result of the detector or the spatial information.
The crisis management system according to claim 9. The crisis management unit determines an appropriate evacuation route at that time based on the degree of congestion of a plurality of target spaces or the risk of each point,
The crisis management system according to claim 10. The crisis management unit controls the brightness or color of illumination according to detection of a detection target event by the detector.
The crisis management system according to claim 10 or 11. The crisis management unit controls the brightness or color of the lighting according to the determined evacuation route.
The crisis management system according to claim 12. The crisis management unit controls air conditioning according to detection of a detection target event by the detector.
The crisis management system according to any one of claims 10 to 13. The crisis management unit generates screen information for causing the display device to display the crisis management information in a predetermined mode.
The crisis management system according to any one of claims 10 to 14. The crisis management unit changes the display mode of the crisis management information according to the state of the target space.
The crisis management system according to any one of claims 10 to 15. The crisis management unit determines the presence or absence of a person in a target space corresponding to the image sensor based on image data acquired from a plurality of image sensors, and based on a change in the presence or absence of a person in each target space Detecting that a person has fallen in the target space,
The crisis management system according to any one of claims 10 to 16. The crisis management unit determines the effectiveness of the detection result of the human fall in each of the target spaces based on attributes associated with each of the target spaces.
The crisis management system according to claim 17. An imaging step of acquiring image data of the target space by imaging the target space;
Spatial information acquisition step of acquiring spatial information indicating an event related to the target space based on the image data;
A sensor information transmission step of transmitting the image data or the spatial information to another device as sensor information of the device;
A setting change step for changing a setting relating to acquisition or transmission of the sensor information in response to detection of a predetermined detection target event having an effect on a person;
A detection method comprising: An imaging step of acquiring image data of the target space by imaging the target space;
Spatial information acquisition step of acquiring spatial information indicating an event related to the target space based on the image data;
A sensor information transmission step of transmitting the image data or the spatial information to another device as sensor information of the device;
A setting change step for changing a setting relating to acquisition or transmission of the sensor information in response to detection of a predetermined detection target event having an effect on a person;
A crisis management method.

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