JP6643922B2 - Fire alarm - Google Patents

Description

  The present invention relates to a fire alarm device that determines and notifies a fire occurrence based on a detection result of a fire event detection unit in a monitoring area, and transmits a captured image of the monitoring area to the outside.

  Patent Document 1 discloses a liquid crystal display of the contents of an abnormality using an image and an image captured by an imaging unit when it is determined that there is a possibility of occurrence of an abnormality such as a fire based on the output of the abnormality detection sensor. An alarm device to be displayed on a device is disclosed. Further, an output unit for transmitting an image displayed on the liquid crystal display to a remote terminal device such as a personal computer or a mobile phone is provided, and the image displayed on the liquid crystal display is provided with an alarm device. It can be confirmed in a place away from the place where you are.

JP-A-2004-326359

In the alarm system disclosed in Patent Literature 1, the situation can be observed from a captured image communicated even from a place away from a monitoring area where a fire has occurred. However, when the monitoring area has a certain size, the fire spots appearing in the captured image become small, making it difficult to understand the fire situation, and depending on the fire spot, there is a problem that the fire status can hardly be confirmed from the shot image.
Under such circumstances, there is a demand for a fire alarm device capable of reliably grasping a fire condition even in a place far from the monitoring area through a captured image in which a fire spot is clearly reflected even if the monitoring area is wide. Have been.

A fire alarm device according to the present invention includes an infrared thermography camera that acquires an infrared image of a monitoring area, a fire event detection unit that detects an event associated with a fire, and a cover that covers the monitoring area with a plurality of imaging visual fields, and A visible light camera unit that selects a field of view to acquire a visible image, a fire determination unit that determines the occurrence of a fire based on the detection result by the fire event detection unit, and a infrared light that responds to the determination of the occurrence of the fire. A fire area calculation unit that regards an area having the highest temperature as a fire area from the infrared image of the thermography camera, and receives a fire visible image obtained by photographing a field of view including the fire area from the visible light camera unit, and An information communication unit that transmits fire alarm information including a visible image to an external device.

  According to this configuration, when the occurrence of a fire is determined based on the detection result of the fire event detection unit, the high-temperature fire area is calculated from the infrared image of the monitoring area acquired by the infrared thermography camera. Since the visible light camera unit covers the monitoring area with a plurality of imaging visual fields, the visible light camera unit acquires a visible image of the imaging visual field in which the calculated fire area is reflected. Since the fire alarm information including the acquired visible image is transmitted to the external device through the information communication unit, the user can observe the shot image aimed at the fire location even in a place away from the monitoring area, and Reliable grasp is possible.

One of suitable technical configurations for dividing the monitoring area into a plurality of sections and acquiring a visible image with each section as a field of view includes a posture changing mechanism for changing a shooting posture in order to change a shooting center axis. Incorporation into a visible light camera unit. In other words, the visible light camera unit comprises a camera module and a posture changing mechanism for changing the posture of the camera module in order to change the field of view of the camera module, the posture changing mechanism, the fire area is photographed The camera module is configured to change the attitude of the camera module so as to enter the field of view. In this configuration, since the attitude of the camera module is changed so that the fire area calculated by the fire area calculation unit falls within the field of view, shooting is performed with the fire area as the aim. As a result, it is possible to transmit a fire visible image that can reliably grasp the fire situation to the external device.

One of the other suitable technical configurations for acquiring a visible image using each section of the divided monitoring area as a photographing field of view is to install a plurality of camera modules aimed at each section and reduce a fire area. This is to select a camera module in which a picture is taken and to take an image of a fire area. That is, the visible light camera unit includes a plurality of camera modules to which different imaging fields are assigned in the monitoring area, and a camera selection unit that selects the camera module in which the imaging area includes the fire area. It is configured to comprise. In this configuration, since the monitoring area is covered by the field of view of the plurality of camera modules, the camera module whose fire area calculated by the fire area calculation unit falls within the field of view is selected, and shooting is performed. As a result, it is possible to transmit a fire visible image that can reliably grasp the fire situation to the external device.

  The information communication unit may be configured to transmit the fire alarm information to a communication device such as a mobile phone or a personal computer that is registered in advance. With this configuration, it is possible to directly and immediately transmit fire alarm information to a department or a person related to a fire in the monitoring area. In addition, since the fire alarm information includes a fire visible image, the fire condition can be reliably grasped and appropriate measures can be taken.

  The imaging field of view of the visible light camera unit can be changed based on a change command from the communication device. With this configuration, if there is an area to be checked other than the fire area calculated by the fire area calculation unit, it is possible to switch to a field of view covering the area, shoot an image, and transmit the visible image to the communication device. Thereby, more appropriate measures against the fire can be taken.

It is a schematic diagram which shows the basic structure of a fire alarm device. It is a functional block diagram showing one of embodiments of a fire alarm device. It is a functional block diagram showing other embodiments of a fire alarm device.

  Before describing a specific embodiment of the fire alarm device 100 according to the present invention, a basic configuration characterizing the fire alarm device of the present invention will be described with reference to FIG. The monitoring area SA, which is one space in a house or office, is simplified here and is shown by a rectangle. Further, the monitoring area SA is divided into a plurality of sections SZ in a grid pattern.

  In the monitoring area SA, an infrared thermography camera 3 and a visible light camera unit 4 are arranged. The infrared thermography camera 3 can acquire and output a captured image in which the entire monitoring area SA is a captured area, that is, an infrared image. The visible light camera unit 4 can use each section SZ of the monitoring area SA as an imaging visual field, and can output a captured image of the selected imaging visual field, that is, a visible image. The imaging field of view of the visible light camera unit 4 is applied to the size of one section SZ, and by changing the imaging field of view, the entire monitoring area SA can be covered.

  The visible light camera unit 4 includes a photographing unit 40 that generates a photographed image, an image processing unit 41 that converts the generated photographed image into image data and outputs the image data, and a photographing visual field changing unit 42 that changes the photographing visual field. I have. One method of changing the shooting field of view is to change the shooting attitude of the shooting unit 40 so that the shooting field of view matches the desired section SZ. Another method is to configure the imaging unit 40 with a plurality of camera modules 400 corresponding to each section SZ, and select a camera module 400 assigned to a desired section SZ. When the former method is adopted, the photographing visual field changing unit 42 is configured as a posture changing mechanism 421 that mechanically changes the posture of the photographing unit 40. When the latter method is adopted, the photographing visual field changing unit 42 is configured as a camera selecting mechanism 422 that selects the camera module 400 having the desired section SZ as the photographing visual field.

  In the monitoring area SA, a fire event detection unit 20 that detects an event accompanying a fire is further arranged. Examples of events associated with a fire include smoke and heat. Smoke-type and thermal-type fire event detection sensors have their own characteristics, so it is advisable to select and install appropriate ones according to the conditions of the monitoring area.Of course, both types are installed. You may. The detection signal of the fire event detection unit 20 is output to the fire determination unit 21. The fire determination unit 21 evaluates the received detection signal to determine whether or not a fire has occurred in the monitoring area SA, and outputs fire occurrence information when it is determined that a fire has occurred.

  The fire area calculation unit 51 receives an infrared image from the infrared thermography camera 3 and fire occurrence information from the fire determination unit 21. Triggered by input of fire occurrence information, the fire area calculation unit 51 analyzes an infrared image, searches for a fire area considered to be a fire occurrence, and calculates a section SZ where a fire has occurred from the position of the fire area. . The fire area calculation unit 51 gives the fire occurrence section information to the imaging visual field change unit 42. Based on the fire occurrence section information from the fire area calculation section 51, the shooting view changing section 42 shoots an image of the shooting view of the section SZ where the fire has occurred, that is, outputs a fire visible image. The unit 40 is controlled.

  The fire alarm information including the fire occurrence information from the fire determination unit 21 and the fire visible image from the image processing unit 41 is converted into transmission data by the information communication unit 52 and output to an external device. The output destination is a communication device such as a communication remote controller, a mobile phone, or a personal computer. For this reason, a telephone number, an IP address, and the like of an output destination are registered in the information communication unit 52 in advance.

  The information communication unit 52 has a function of receiving a control command from an external device and converting it into an internal command. Using this function, the change of the field of view of the visible light camera unit can control the field of view changing unit 42 based on a command to change the field of view from the communication device.

  Next, one specific embodiment of the fire alarm device 100 according to the present invention will be described. As shown in FIG. 2, in this embodiment, the monitoring area SA is a dining kitchen room of a private residence. A smoke detection sensor 201 that uses scattering of light due to smoke is installed as a fire event detection unit 20 near the ceiling. The detection signal is sent to the control device 1. Further, an infrared thermography camera 3 and a visible light camera unit 4 are installed on the ceiling. The infrared thermography camera 3 is a super wide-angle camera that covers substantially the entire area of the room within the field of view. Therefore, the heat distribution of the entire room is calculated from the infrared image output from the infrared thermography camera 3.

  In this embodiment, the visible light camera unit 4 processes the image signal from the camera module 400, the attitude changing mechanism 421 for changing the attitude of the camera module 400, and the image signal from the camera module 400, and outputs it as a fire visible image. An image processing unit 41 is provided. The attitude changing mechanism 421 is an electric pan head that is remotely operated, and changes the attitude of the camera module 400 mounted on the pan head based on a control signal from the control device 1. Accordingly, the camera module 400 can cover the entire area of the room in the field of view.

  The control device 1 has various control functions that operate when a fire occurs. The basic control configuration employs the basic control described above with reference to FIG. Therefore, the control device 1 mainly includes the input data processing unit 50, the fire determination unit 21, the fire area calculation unit 51, the information communication unit 52, the notification information generation unit 53, the camera attitude calculation unit 54, and the device control unit 55. Built with software. The fire determination unit 21 determines the occurrence of a fire based on the detection result of the smoke detection sensor 201, and outputs a fire occurrence signal when determining that a fire has occurred. The fire determination unit 21 can be combined with the smoke detection sensor 201 and integrated as a fire occurrence detection unit. In that case, a fire occurrence signal is input to the control device 1.

  The input data processing unit 50 receives a signal such as image data by a wireless method or a wired method, converts the signal into an appropriate format to a function unit built in the control device 1, and transfers the signal to the function unit. The information communication unit 52 is a communication interface for exchanging data with a mobile phone, a tablet computer, or a server system as the external communication device 7 in a wireless or wired manner, and includes a telephone number, an IP address, and a URL of each external communication device 7. Communication destination information is registered. The notification information transmitted to the external communication device 7 is generated by the notification information generation unit 53. The notification information also includes a notification signal for driving a buzzer and a monitor. When a fire occurs, a buzzer can issue a fire alarm or display a fire notification on a monitor in another room.

  The fire area calculation unit 51 analyzes the infrared image of the infrared thermography camera 3 in response to the fire occurrence signal, and determines an area having the highest temperature as a fire area. Further, a fire position in the room, which is the monitoring area SA, is calculated from the coordinate position of the fire area in the infrared image. The camera posture calculation unit 54 calculates the camera posture in which the fire area calculated by the fire region calculation unit 51, that is, the fire position in the room, is within the field of view of the camera module 400. Further, an operation command for moving the posture changing mechanism 421 is generated so that the camera module 400 has the calculated camera posture. For this reason, in the camera posture calculation unit 54, a look-up table is set in which a target position of the posture changing mechanism 421 to be included in the field of view of the camera module 400 is derived from the coordinate position of the infrared image. An operation command is generated from the derived target position and the current position of the posture changing mechanism 421. The generated operation command is converted into a control signal by the device control unit 55 and provided to the posture changing mechanism 421.

  The camera module 400 in which the fire area is within the shooting field of view by the attitude changing mechanism 421 starts shooting, and the obtained shot image is sent to the control device 1 as a fire visible image via the image processing unit 41. The transmitted fire visible image is incorporated into the notification information regarding the fire by the notification information generation unit 53 and transmitted to the external communication device 7 via the information communication unit 52.

  In this embodiment, a function of the visible light camera unit 4, in particular, a remote camera operation application capable of remotely operating the posture changing mechanism 421 is installed in the specific external communication device 7. Therefore, the posture change mechanism 421 can be remotely operated through the external communication device 7 to transmit a captured image of an arbitrary area in the room, which is the monitoring area SA, and check the state of the arbitrary area.

  FIG. 3 shows a modification of the fire alarm device 100 described above. In the fire alarm device 100, compared to the embodiment shown in FIG. 2, the visible light camera unit 4 is provided with a plurality of camera modules 400, and as the shooting visual field changing unit 42, one camera module 400 from the plurality of camera modules 400 is used. A camera selection mechanism 422 for selecting 400 is provided. Further, in the control device 1, a camera selection unit 56 is constructed instead of the camera posture calculation unit 54. Each camera module 400 is fixed to a different field of view so as to cover the entire area of the room, which is the monitoring area SA, according to the field of view of all camera modules 400. The camera selection mechanism 422 selects a specific camera module 400 and sends a captured image acquired by the camera module 400 to the image processing unit 41. The camera selection unit 56 specifies the camera module 400 to be selected, and sends a control signal to the camera selection mechanism 422 via the device control unit 55 so that the camera module 400 is selected. The camera selection unit 56 is provided with a look-up table for deriving a camera module 400 that includes the fire area in the field of view from the fire area (section SZ) calculated by the fire area calculation unit 51.

  Therefore, in the fire alarm device 100 shown in FIG. 3, when the fire area is calculated by the fire area calculation unit 51, the camera module 400 that includes the fire area in the field of view is selected, and the shot image is displayed. Is sent to the control device 1 as a fire visible image. The transmitted fire visible image is incorporated into the notification information regarding the fire by the notification information generation unit 53 and transmitted to the external communication device 7 via the information communication unit 52.

[Another embodiment]
(1) In the above-described embodiment, the fire alarm device 100, the camera unit 4, the fire event detection unit 20, such as the smoke detection sensor 201, the infrared thermography camera 3, and the control device 1 are separately illustrated. However, at least some or all of these components may be integrated. When all are integrated, the fire alarm device 100 is housed in one housing and mounted in an appropriate place.
(2) In the above-described embodiment, the smoke detection sensor 201 is used as the fire event detection unit 20. Instead, a heat / heat detection sensor that detects a fire based on a rise in room temperature is used. You may. Alternatively, a gas sensor that detects a fire based on an increase in the concentration of carbon monoxide may be used.

(3) Instead of covering the entire monitoring area SA with the field of view of the camera module 400, a configuration may be adopted in which an area that is unlikely to cause a fire is excluded and only the main area of the monitoring area SA is covered. .

(4) In the above-described embodiment, the posture changing mechanism 421 and the camera selecting mechanism 422 are adopted as the photographing visual field changing unit 42, but a form in which these are combined may be adopted.

  Note that the configuration disclosed in the above embodiment (including another embodiment, the same applies hereinafter) can be applied in combination with the configuration disclosed in another embodiment unless there is a contradiction. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a fire alarm device that transmits a captured image of a fire area to an external device together with fire detection.

1: control device 20: fire event detection unit 21: fire determination unit 201: smoke detection sensor 3: infrared thermography camera 4: visible light camera unit 40: imaging unit 400: camera module 41: image processing unit 42: imaging field of view changing unit 421: posture change mechanism 422: camera selection mechanism 50: input data processing unit 51: fire area calculation unit 52: information communication unit 53: notification information generation unit 54: camera posture calculation unit 55: device control unit 56: camera selection unit 7 : External communication device SA: Monitoring area SZ: Partition

Claims (5)

An infrared thermography camera for acquiring an infrared image of the monitoring area,
A fire event detector for detecting an event associated with the fire;
A visible light camera unit that covers the monitoring area with a plurality of imaging visual fields and selects a specific imaging visual field to acquire a visible image,
A fire determination unit that determines a fire occurrence based on a detection result by the fire event detection unit;
In response to the determination of the fire occurrence, from the infrared image of the infrared thermography camera a fire region calculation unit that considers the region with the highest temperature as a fire region,
An information communication unit that receives a fire visible image obtained by capturing an imaging visual field including the fire area from the visible light camera unit and transmits fire alarm information including the fire visible image to an external device. Alarm device. The visible light camera unit includes a camera module, and a said camera module posture changing mechanism for changing the posture of the camera module in order to change the field of view of, the posture changing mechanism, the fire area is the field of view The fire alarm device according to claim 1, wherein the posture of the camera module is changed so as to enter. The visible light camera unit includes a plurality of camera modules each having a different imaging field of view assigned to the monitoring area, and a camera selection unit that selects the camera module that includes the fire area in the imaging field of view. The fire alarm device according to claim 1.   The fire alarm device according to any one of claims 1 to 3, wherein the information communication unit transmits the fire alarm information to a communication device registered in advance.   The fire alarm device according to claim 4, wherein a change in a field of view of the visible light camera unit can be performed based on a change command from the communication device.

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