JP2004303093A - Fire-setting detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compute the density or hue of smoke by use of a monitoring camera which never causes a false report even if set outdoors by controlling the sensitivity of a flame sensor so as to switch to high sensitivity upon receipt of an intrusion signal, thereby generally setting the sensitivity to low sensitivity. <P>SOLUTION: This fire-setting detection system comprises the flame sensor 20 having a flame detection part 21 and a human body sensor 10 having a human body detection part 11. This system further comprises a sensitivity setting part 22 for setting the sensitivity of the flame detection part, a transmission part 12 for transmitting the intrusion signal when the human body detection part 11 detects a human body, and a receiving part 25 for receiving the intrusion signal. When the intrusion signal is received, the sensitivity of the sensitivity setting part is controlled to switch to high sensitivity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an arson detection system for detecting an arson in a fire, particularly an important cultural property.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a fire sensor including a flame sensor having a flame detection unit and a human body sensor having a human body detection unit is disclosed in Patent Document 1 and the like. The arson sensor determines that an arson has occurred and issues an alarm when the flame sensor and the human body sensor detect the flame and the human body, respectively.
[0003]
[Patent Document 1]
JP 2000-123266 A
[Problems to be solved by the invention]
Arson, unlike normal fires, occurs outside the building. For this reason, it is necessary to detect a fire outdoors. However, if a flame sensor is installed outdoors, there is a possibility that false alarms may occur due to sunlight or the like.
[0005]
[Means for Solving the Problems]
The present invention has been made in order to solve the above problems, and sets the sensitivity of a flame detection unit in a fire detection system including a flame sensor having a flame detection unit and a human body sensor having a human body detection unit. A sensitivity setting unit, a transmission unit that transmits an intrusion signal when the human body detection unit detects a human body, and a reception unit that receives an intrusion signal, increases the sensitivity of the sensitivity setting unit when an intrusion signal is received. It is characterized by performing control so as to switch to sensitivity.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram of the arson detection system of the present invention, and FIG. 2 is a schematic diagram of the arson detection system of the present invention.
[0007]
First, the installation mode of the sensor will be described with reference to the schematic diagram of the system in FIG. 1 denotes a building such as a shrine or a mountain gate, 10 denotes a human body sensor (hereinafter also referred to as a human body detection sensor), and 20 denotes a flame sensor. When the building 1 to be protected is an important cultural property, the flame sensor 20 and the like cannot be mounted under the eaves of the building 1 or the like. This is because the building 1 may be damaged by the attachment.
[0008]
Therefore, the flame sensor 20 is attached to the tree 3 adjacent to the building 1. The human body detection sensor 10 is installed outside the building 5 adjacent to the building 1. At this time, the human body detection sensor 10 and the flame sensor 20 are attached so that the building 1 to be protected falls within the field of view. If one building cannot protect the building 1, a plurality of sensors 10 and 20 are installed using the tree 2 and the building 5 adjacent to the building 1. By thus installing one or more sensors 10 and 20 around the building 1, the arson in the building 1 is detected.
[0009]
Here, since the sensors 10 and 20 are installed outdoors away from the building 1, it is troublesome to connect the sensors with electric wires and supply power with electric wires. Therefore, in consideration of installation outdoors, a sensor that can supply power from a solar cell and wirelessly transmit an abnormal signal is desired. Hereinafter, a block configuration of such sensors 10 and 20 will be described with reference to FIG.
[0010]
In FIG. 1, 10 is a human body detection sensor, 20 is a flame sensor, and 30 is a receiver. First, the block configuration of the human body detection sensor 10 will be described. The human body detection sensor 10 has a human body detection unit 11. The human body detection unit 11 is means for detecting the presence of a human using a known laser beam, infrared light, or the like. Reference numeral 12 denotes a wireless transmission unit which transmits an intrusion signal wirelessly to the wireless transmission unit 25 and the receiver 30 of the flame sensor 20 when the human body detection unit 11 detects a human body. Reference numeral 13 denotes a solar cell that converts sunlight into electric energy. The generated electricity is stored in a power supply unit 14 having a rechargeable battery and transmitted to another block such as the human body detection unit 11 via a control unit 15. Supplied. In addition, since the solar cell 13 generates power only during the daytime, arson is often performed mainly at night when there are no people, the capacity of the rechargeable battery is set to have a capacity that can be monitored at night.
[0011]
Next, the configuration of the flame sensor 20 will be described. Reference numeral 23 denotes a solar cell, and 24 denotes a power supply unit, which is the same as the solar cell 13 and the power supply unit 24 provided in the human body detection sensor 10. Reference numeral 21 denotes a flame detection unit which detects a flame, for example, has a detection element such as an infrared detection element or an ultraviolet detector which detects a wavelength of 4.3 μm or the like specific to the flame. Reference numeral 22 denotes a sensitivity setting unit for setting the sensitivity of the flame detection unit 21, which can be switched between, for example, two stages of high sensitivity and low sensitivity. In the normal state, the sensitivity setting unit 22 is set to low sensitivity, so that the flame detection unit 21 does not issue an alarm due to a non-fire factor such as sunlight.
[0012]
Reference numeral 25 denotes a wireless receiving unit that receives a wireless intrusion signal from the human body detection sensor 10. Reference numeral 26 denotes a wireless transmission unit that wirelessly transmits a fire signal to the receiver 30 when the flame detection unit 21 detects a flame. Reference numeral 27 denotes a camera unit, and 28 denotes an illumination unit. When the wireless receiving unit 25 receives an intrusion signal, it is controlled by the control unit 29 to be activated. In addition, the camera unit 27 including the monitoring camera is installed so that the imaging range includes the monitoring range of the flame detection unit 21. When a fire is detected, the image signal captured by the camera unit 27 is sent to the receiver 30 together with the fire signal by the wireless transmission unit 26.
[0013]
In the flame sensor 20, the blocks 21 to 28 are controlled by the control unit 29, and the control unit 29 switches the sensitivity of the sensitivity setting unit 22 to high sensitivity when receiving an intrusion signal from the human body detection sensor 10. Control.
[0014]
Next, the configuration of the receiver 30 will be described. The receiver 30 is installed in a place where a person is always present, such as a building 5 near the building 1 to be protected. The receiver 30 includes a wireless receiving unit 31 that receives an intrusion signal from the human body detection sensor 10 and a fire signal from the flame sensor. When the fire signal and the intrusion signal are received, the receiver 30 determines that a fire has occurred. Reference numeral 32 denotes a transfer unit which, when it is determined that an arson has occurred, transfers an arson signal to a predetermined portable terminal. In the transfer unit 32, the telephone number of the mobile phone owned by the manager of the building 1 is registered. A control unit 33 controls the wireless transfer unit 31 and the transfer unit 32.
[0015]
Next, a case where arson is performed in the present system will be described. Power is supplied to the sensors 10 and 20 by electricity generated by the solar cells 13 and 23 during the day, and power is supplied by rechargeable batteries of the power supply units 14 and 24 at night.
[0016]
First, when the arsonist approaches the building 1, the human body detection unit 11 of the human body detection sensor 10 detects the arsonist, and the wireless transmission unit 12 wirelessly transmits an intrusion signal to the flame sensor 20 and the receiver 30. Upon receiving the intrusion signal, the wireless receiving unit 25 of the flame sensor 20 controls the sensitivity setting unit 22 to switch the sensitivity to high sensitivity. By this switching, the flame detection unit 21 can detect the flame in which the arson ignited the building 1 as soon as possible. When a plurality of flame sensors 20 are installed, the sensitivity of all the flame sensors 20 provided near the activated human body detection sensor 10 and receiving the intrusion signal is switched to high sensitivity.
[0017]
Further, when the wireless receiving unit 25 of the flame sensor 20 receives the intrusion signal, the controller 27 controls to activate the camera unit 27 and the lighting unit 28. By activating the camera unit 27, the range monitored by the flame detection unit 21 is imaged. Since the arson is usually performed in an invisible time zone such as at night, the monitoring area can be normally imaged by activating the lighting unit 28 to brighten the periphery of the building 1.
[0018]
When the flame detector 21 detects a flame, the wireless transmitter 26 transmits a fire signal to the receiver 30. The wireless transmission unit 26 also transmits an image captured by the camera unit 27 to the receiver 30 at the same time.
[0019]
Upon receiving two signals, the intrusion signal from the human body detection sensor 10 and the fire signal from the flame sensor 20, the wireless reception unit 31 of the receiver 30 determines that the fire is arson, activates an alarm unit (not shown), and Alerts that an action has been taken. Further, an image captured by the camera unit 27 is displayed on a display unit (not shown). As a result, the fire situation for the building 1 can be grasped, and the crime scene of the arsonist can be confirmed.
[0020]
When the receiver 30 determines that the fire is arson, the transfer unit 32 transfers the arson signal to the portable terminal of the manager. Thereby, the manager can know that the arson has been performed in the building 1 without being away from the building 5 and near the receiver 30.
[0021]
The arson signal may be transmitted not only to the manager but also to a fire station or police station. In this case, information for specifying the position of the building 1 can be sent together with the arson signal. In addition, although the power of each sensor is obtained from the solar battery, the power may be supplied via an electric wire or may be driven by a dry battery or the like. The monitoring field of view of the human body detection sensor may be provided outside the monitoring field of view of the flame sensor. With this configuration, even if a fire is thrown from a place remote from the fire prevention target, the human body detection sensor has a large monitoring field of view, so that an arsonist can be detected.
[0022]
As described above, in the arson detection system of the present invention, the sensors 10 and 20 are supplied with power by the solar cell and the power supply unit, and transmit an abnormal signal such as a fire signal by the wireless transmission unit. Eliminates the need for transmission wires. This is effective in constructing a system in which a sensor cannot be directly installed on an object to be protected, such as an important cultural property.
[0023]
【The invention's effect】
The present invention is configured as described above, and when the intrusion signal is received, the sensitivity of the flame sensor is controlled to be switched to high sensitivity, so that it can be normally set to low sensitivity and installed outdoors. However, misinformation is unlikely to occur.
[Brief description of the drawings]
FIG. 1 is a block diagram of an arson detection system according to the present invention.
FIG. 2 is a schematic diagram of the arson detection system of the present invention.
[Explanation of symbols]
10 human body sensor, 11 human body detector, 12 wireless transmitter,
13 solar cell, 14 power supply unit, 15 control unit, 20 flame sensor,
21 Flame detection part, 22 Sensitivity setting part, 23 Solar cell,
24 power supply section, 25 wireless receiving section, 26 wireless transmitting section, 27 camera section,
28 lighting unit, 29 control unit, 30 receiver, 31 wireless receiving unit,
32 Transfer Department,

Claims (6)

In a arson detection system including a flame sensor having a flame detection unit and a human body sensor having a human body detection unit,
A sensitivity setting unit for setting the sensitivity of the flame detection unit,
When the human body detection unit detects a human body, a transmission unit that transmits an intrusion signal,
A receiving unit for receiving the intrusion signal,
When receiving the intrusion signal, the arson detection system controls to switch the sensitivity of the sensitivity setting unit to high sensitivity. The flame sensor, when the flame detection unit detects a flame, provided a transmission unit that transmits a fire signal, when the fire signal and the intrusion signal is received, it is provided with a receiver that determines that arson The arson detection system according to claim 1, wherein: The arson detection system according to claim 2, wherein the receiver is provided with a transfer unit that transfers an arson signal to a predetermined portable terminal when it is determined that the arson is arson. The said flame detection part is provided with the camera part and the illuminating part, and when receiving the said intrusion signal, it controls so that this camera part and an illuminating part may be started, The Claim 2 or Claim 3 characterized by the above-mentioned. Arson detection system. The arson detection system according to any one of claims 1 to 4, wherein a solar cell is provided in the flame sensor and the human body sensor. When a human body is detected, a human body sensor having a wireless transmission unit that wirelessly transmits an intrusion signal,
A flame sensor having a wireless transmission unit that wirelessly transmits a fire signal when a flame is detected,
The arson detection system, wherein the human body sensor and the flame sensor are provided around the building so that the building to be protected falls within the field of view of the sensor.

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