JP2003317157A - Photography system for monitoring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely photograph the front face of a culprit. <P>SOLUTION: A plurality of monitor ranges are set around a monitor range. A monitor device 11 takes an electronic flash photograph by a camera 17 in response to sending a flame by a flame sensor 20 and receives electronic flash light of another monitor device by a photodetection sensor 21 to takes an electronic flash photograph by the camera 17. One of the plurality of monitor devices senses a flame and takes an electronic flash photograph and then the photodetection sensor detects the electronic flash light, so that the remaining monitor devices associatively take photographs. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance photography apparatus for detecting a crime, taking a picture of the scene, and later recognizing the situation at the scene.

[0002]

2. Description of the Related Art In recent years, suspicious fires, which are considered to be arson, have been increasing. Arsons predominantly occur at night in places other than buildings such as streets and parks. Also, arson occurs in ordinary houses and apartments even during the day. Furthermore, there is a survey result that half of the cultural property fires are caused by arson.
Therefore, the issue of monitorability is an important factor.

As a device for unmanned monitoring a fire, a flame detection device with a camera or the like is known. The device includes a flame detecting means for detecting a disaster and a television camera with a video tape recorder (hereinafter referred to as "video camera"),
In response to the flame sensing means sensing a disaster, the video camera is activated to record the fire scene on video tape. Also, instead of a video camera, a simplified surveillance camera having a built-in camera is proposed in Japanese Utility Model Laid-Open No. 3-29931.

[0004]

However, there is a possibility that the face of the criminal cannot be photographed by any of the surveillance devices depending on the photographing direction.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a monitoring photo taking system devised so that a criminal can be surely identified.

[0006]

In order to achieve the above-mentioned object, in a surveillance photography system of the present invention, a holding section for holding the photography means, a photography execution means for causing the photography means to perform photography, and a monitoring range. A security sensor to monitor the inside,
A plurality of monitoring devices each having a control means for actuating the photographing execution means in response to the detection of the security sensor are arranged in a posture in which the photographing range of the photographing means in the previous term includes the monitoring range and the photographing direction is changed. Each monitoring device is provided with an interlocking control unit that operates the photographing execution unit in response to the operation of any of the other monitoring devices. As the arrangement of the plurality of monitoring devices, it is preferable to arrange the plurality of monitoring devices by changing the shooting direction so as to at least face the monitoring range.

The interlocking control means may be configured such that each monitoring device is connected by wire and the detection signal of the security sensor is input to all the photographing execution means of the other monitoring devices. Also,
In the case of wireless communication, the light receiving sensor and the interlocking means that operates the image capturing executing means in response to receiving the strobe light emitted from the strobe device provided in the image capturing means of the other monitoring device by the light receiving sensor. You may comprise. Further, wirelessly, interlocking to operate the image capturing execution unit in response to reception of a sound wave or a radio wave of a specific frequency emitted from a receiver and a transmitter provided in the image capturing unit of another monitoring device by the receiver. It may be configured by means.

As the crime prevention sensor, a small micro switch which is directly attached to a door or a window to operate, an infrared sensor which detects a person's body temperature, a pressure sensor which detects a pressure change due to opening and closing of an entrance, and an abnormal sound emitted when an intrusion occurs. It is possible to use a microphone for sensing, a disconnection sensor for a circuit breaker, a flame sensor for sensing flames such as a lighter or a match. As a flame detection means,
It is preferable to use a flame sensor which is an ultraviolet sensor that does not require the use of an optical visible light cut filter such as a semiconductor sensor.

As the photographing means, a camera or a film unit with a lens in which a photographic film is preloaded at the time of manufacturing is used. In the case of a camera, load a photo film and set it. Further, it is desirable to have an automatic winding function that allows continuous shooting while the shutter release is being pressed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A fire monitoring photography system 10 according to an embodiment of the present invention comprises a plurality of monitoring devices 11-1.
It is composed of 4. Each monitoring device 11 to 14 has a monitoring range 1
Around the center of 5, the shooting direction is changed and arranged.

As shown in FIG. 2, the monitoring device 11 includes a waterproof / dustproof case 16, a holding unit 18 for holding the camera 17, a photographing execution unit 19, a flame sensor 20, a light receiving sensor 21, a control unit 22, and an interlocking control unit 23. , And a power supply unit 24 and the like. Since the monitoring devices 11 to 14 have the same configuration, the configuration of the monitoring device 11 will be described below.

A part of the case 16 is a transparent window. From that window, the shooting lens of camera 17, camera 17
The strobe light emission window, the detection portion of the flame sensor 20, and the light receiving portion of the light receiving sensor 21 are exposed. Also, case 1
The 6 also has a lid that can be opened and closed to take out a camera or the like.

The camera 17 has a built-in strobe device and can be set so that stroboscopic photography is always performed. The photo film is automatically rolled up after the photographing is finished, and charging of the strobe device is started. Use a fully automatic one. The holding unit 18 detachably holds the camera 17 in a posture in which the shooting range includes the monitoring range. The strobe device may be charged from a battery separately prepared instead of using the battery built in the camera 17.

The flame sensor 20 is, for example, 185 to 260n.
It is an ultraviolet sensor with sensitivity in the wavelength range of m,
A sensing signal is sent to the control unit 22 in response to sensing the flame. The sensing signal is a pulse signal that is output only while sensing the flame.

The control unit 22, as shown in detail in FIG. 3, has a level adjusting circuit 30, an output circuit 31, and a timer circuit 3.
2 and the like, and sends an execution signal to the photographing execution means in response to receiving the sensing signal. The power supply unit 24 includes an external battery 33 and a booster circuit 34.

The booster circuit 34 boosts the voltage of the external battery 33 and supplies the boosted high voltage to the flame sensor 20. The pulse signal which is a sensing signal is sent to the output circuit 31 after being taken in by the level adjusting circuit 30. Flame sensor 20
The number of output pulses changes depending on the amount of incident ultraviolet rays. The level adjusting circuit 30 can adjust the level of sensing the amount of incident ultraviolet light, that is, the number of pulses generated per unit time to be regarded as an output signal.

The output circuit 31 counts the pulse signals output from the level adjusting circuit 30, and outputs a continuous level signal every time a predetermined value is counted.
The level signal is converted into an output signal for a fixed time by the timer circuit 32, and then the output signal is sent to the photographing execution section 19.

The photographing execution section 19 is composed of a release mechanism 40 that releases the shutter button of the camera 17 only once, and a driver 41 that operates the release mechanism 40 in response to receiving the output signal. The release mechanism 40 includes an actuator such as a solenoid. The driver 41 is composed of a switching circuit including a resistor and a transistor, and inputs a voltage supplied from the booster circuit 34 to the actuator in response to an output signal obtained from the control unit 22. Note that the release mechanism 40 may be a mechanism that continues shutter release for a predetermined time. In this case, continuous shooting according to the release duration time can be performed.

The light receiving sensor 21 sends a light receiving signal to the interlocking controller 23 in response to receiving the strobe light. This light reception signal is also a pulse signal that is output only while strobe light is being detected.

The interlocking controller 23 is also composed of a level adjusting circuit, an output circuit, a timer circuit, etc., and sends an output signal to the controller 22 in response to receiving a detection signal.

A voltage obtained by boosting the voltage of the external battery 33 by the booster circuit 34 is supplied to the light receiving sensor 21. The pulse signal, which is a detection signal, is sent to the output circuit after being taken in by the level adjustment circuit. The number of output pulses of the light receiving sensor 21 also changes depending on the amount of strobe light incident. The level adjusting circuit can adjust the sensing level of the amount of incident light, that is, how many pulses are generated per unit time to be regarded as an output signal.

The output circuit counts the pulse signals output from the level adjusting circuit, and outputs a continuous level signal each time a predetermined value is counted. The level signal is converted into an output signal for a fixed time by the timer circuit and then sent to the control unit 22. The control unit 22 is the interlocking control unit 2
By detecting the output signal obtained from the photographing execution unit 1,
The execution signal is output to 9. The interlocking control unit 23 has the same configuration as the control unit 22 illustrated in FIG. 3 except for the signal transmission / reception destination, and therefore a detailed configuration diagram is omitted.

The camera 17 has a strobe irradiation range set to a range including a photographing range. The shooting range of the camera 17 is a range including the sensing range of the flame sensor 20.
The light receiving range of the light receiving sensor 21 is also a range including the photographing range. Therefore, the shooting range of the monitoring devices 11 to 14 may be set in a posture that matches the range including the monitoring range 15.

As shown in FIG. 1, when the monitoring range 15 is monitored so as to include the trash box 42, the photographing range of the camera 17 is monitored in four monitoring areas 15 around the trash box 42.
The monitoring devices 11 to 14 are arranged so that the postures include. When a fire such as a lighter is lit at the corner between the dustbin 40 and the shield 43, the shield 43 or the dustbin 42 of the monitor 11 to 14 blocks the detection range of the flame sensor 20, No. 12 cannot detect the flame with the flame sensor 20, whereas the monitoring device 1 is not blocked.
The flame sensor 20 detects flames 3 and 14.

In the monitoring devices 13 and 14 that have detected the flame, the detection signal is sent from the flame sensor 20 to the control unit 22. The control unit 22 sends the execution signal to the photographing execution unit 19 by receiving the sensing signal. The photographing execution unit 19 executes the shutter release of the camera 17 in response to the execution signal. The camera 17 executes flash photography in response to the shutter release.

Monitoring devices 11 and 12 that did not detect flames
Detects the strobe light emitted from the detected monitoring devices 13 and 14 by the light receiving sensor 21. Light receiving sensor 2
1 sends a detection signal to the interlocking controller 23 in response to receiving the strobe light. The interlocking control unit 23 sends an output signal to the control unit 22 in response to receiving the detection signal, and the control unit 22
Sends an execution signal to the shooting execution unit 19 in response to the reception of the output signal. As a result, all the monitoring devices 11 to 1
Shooting is done with the 4th camera.

In many cases, the photographs taken by the monitoring devices 13 and 14 that detect the flame only show the rear view and the side view of the arsonist. However, a monitoring device 11 that does not detect flames,
There is a high possibility that the front face of the arsonist appears in the picture taken in 13. In this way, by arranging the monitoring device at positions facing each other across the monitoring range 15, it is possible to reliably capture the front face of the arsonist.

When the photographing of all the photographed frames is completed, the lid of the case 16 is opened, the camera 17 is removed from the holding portion 18, the back lid of the camera 17 is opened, and the photographic film is exchanged. Thereby, the camera 17 can be continuously used.

In the above embodiment, four monitoring devices are used, but the present invention is not limited to this number and any number of two or more may be used. In particular, as described in the above embodiment, if the configuration is such that shooting is performed in response to the reception of strobe light by the light receiving sensor, the labor of connecting the monitoring devices to each other can be saved. Because you can
Easy to install. Note that the monitoring devices may be connected to each other by wiring to interlock with each other. Further, instead of the structure in which the strobe light is used as a trigger, a structure in which a trigger signal is transmitted and received wirelessly may be adopted.

In the case of a wireless structure, the photographing execution means is activated in response to reception of a sound wave or a radio wave of a specific frequency emitted from a receiver and a transmitter provided in another monitoring device. And an interlocking control unit.

A film unit with a lens can be used instead of the camera. As is well known, the lens-fitted film unit is preloaded with a photographic film at the time of manufacture. Then, if the winding knob is continuously rotated while the shutter button is kept pressed, one frame film winding and shutter release are alternately performed, so that continuous shooting can be performed. Therefore, a shutter button pressing member that constantly presses the shutter button is provided. In addition, the strobe charge starting means and the film winding means are activated in response to the detection by the flame sensor. According to this, as compared with the case where the strobe charge button is kept pressed, the strobe charge is started immediately after the fire is detected, and therefore, the consumption of the strobe battery can be prevented.

Although the strobe charge starting means and the film winding means may be operated at the same time, the strobe charging starting means is first operated and then the film winding means is operated in order to increase the strobe charging time. Is preferred. If the film winding means is operated while the shutter release is constantly pressed, continuous shooting can be performed according to the operating time of the film winding means. Note that the shooting is not limited to continuous shooting, and shooting may be performed frame by frame in response to flame detection. In this case, the operation time of the film winding means is shortened, or the film winding detection means is provided, and the operation of the film winding means is stopped in response to the detection means detecting the film winding stop. Good. Further, it may be configured such that only one frame is photographed in response to the flame detection. In this case, it is sufficient to perform the winding operation in advance and then set the lens-fitted film unit, and the film winding means can be omitted.

The strobe irradiation range built into the lens-fitted film unit may not reach the range covered by the flame sensor. We also want to extend the strobe irradiation distance to widen the range in which stroboscopic photography is possible. Therefore, it is preferable to include a light receiving sensor and an auxiliary strobe device that emits slave light in response to receiving the strobe light emitted from the strobe device built in the unit by the light receiving sensor. As an auxiliary strobe device, 2
It is desirable to prepare more than one and shift the irradiation range so as to widen the stroboscopic irradiation range in the left-right direction. Also,
The filming angle of view of the lens-fitted film unit is narrower than the monitoring range of the flame sensor. Therefore, it is desirable to use a wide converter lens so that the photographing range is equal to or wider than the monitoring range.

The photographing executing means operates the film winding means while the flame sensor detects the flame. With this,
The motor continues to be driven even after the shooting is completed on all the photo frames of the photo film, which causes the motor to be significantly consumed. In addition, it is preferable to perform continuous shooting for a plurality of shooting frames in a short time as a photograph for monitoring. Therefore,
After a certain time has passed since the timer circuit was installed to detect the flame,
That is, it is desirable to stop the operation of the film winding means after a lapse of time sufficient for continuous shooting of a plurality of frames.

In order to ensure photographing, it is desirable to push the shutter release once each time the film winding stopper is activated. In this case, the shutter release means is a pressing means which is movable between a pressing position for pressing the shutter button and a pressing release position retracted from the shutter button, and the film winding means has a winding knob fastened thereto. A drive for switching to a winding stop detecting means for detecting that the winding knob is driven, a transmission position for driving the winding knob, and a shut-off position for releasing the drive applied to the winding knob by the winding stop detecting means in conjunction with the detection of the winding stop. And a blocking means. In this case, the photographing execution means is
While the film winding means is winding the film, the shutter release means is controlled to intermittently perform one operation in which the pressing means moves from the pressing release position to the pressing position and again to the pressing release position. .

The operation of the film winding means may be stopped when the winding stop detecting means detects the winding stop. In this case, the shutter release means is driven to move the pressing means to the pressing position to release the shutter when or after the operation of the film winding means is stopped. Then, the film winding means may be actuated again in response to the pressing means returning to the pressing release position, or in response to the cancellation of the winding stop detection of the winding stop detection means.

The winding knob winds the photographic film by rotating the winding knob in one direction. As the film winding means, a rotating plate which is pressure-bonded to the outer periphery of the winding knob and rotates the winding knob by driving the motor, and a motor control means which controls the driving of the motor in response to the presence or absence of the detection signal from the flame detection means, It is composed of a flame sensor, a motor, and a power supply for supplying power to the motor control means. A replaceable type such as a battery or dry cell is desirable as the power source.

In the above embodiment, the example for arson monitoring is explained, but the present invention is not limited to this. For example, it can be used later for disaster prevention in a laboratory, a test room, a manufacturing process, etc. The cause of the fire can be easily determined. Further, by using a crime prevention sensor instead of the flame sensing means, it can be used for crime prevention monitoring. Crime prevention sensors include a small micro switch that operates directly attached to a door or window, an infrared sensor that detects the body temperature of a person, a pressure sensor that detects pressure changes due to opening and closing of entrances, and a microphone that detects abnormal sounds when an intrusion occurs. ,
A disconnection detection sensor used in a circuit breaker can be used.

[0039]

As described above, according to the surveillance photo-taking system of the present invention, a plurality of surveillance devices are arranged by changing the photographing direction of the photographing means, and each surveillance device has one of the other surveillance devices. Since the interlocking control means for activating the photographing execution means in response to the activation of any one of them is provided, it is possible to activate the monitoring device that cannot be detected by the crime prevention sensor. Therefore, the face of the criminal on the front side can be reliably photographed. can do.

Further, according to the invention in which a signal for interlocking each monitoring device is wirelessly transmitted and received, the work for connecting the wires one by one is not required, so that the installation becomes easy.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a surveillance photography system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a monitoring device.

FIG. 3 is an explanatory diagram showing a control unit.

[Explanation of symbols]

10 Surveillance photography system 17 cameras 18 Hold 19 Shooting execution unit 20 flame sensor 21 Light receiving sensor 24 power supply

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 17/38 G03B 17/38 BF term (reference) 2H020 FB01 FB05 2H053 AD03 5C084 AA02 AA07 BB33 CC17 DD02 DD12 DD33 DD43 DD77 EE02 FF03 FF20 GG44 GG68 GG78 HH09

Claims (4)

[Claims] 1. A holding unit for holding a photographing means, a photographing execution means for causing the photographing means to perform photographing, a security sensor for monitoring a monitoring range, and the photographing execution means in response to the detection of the security sensor. A plurality of monitoring devices provided with a control means for operating the monitoring means, the shooting range of the shooting means being arranged in a posture including the monitoring range and changing the shooting direction. A monitoring photography system, comprising interlocking control means for activating the photography executing means in response to the activation of any one of the above. 2. A strobe device is provided in each of the plurality of photographing means, and the interlocking control means receives the strobe light emitted from a light receiving sensor and a strobe device provided in another photographing means by the light receiving sensor. 2. The surveillance photo-taking system according to claim 1, further comprising: an interlocking control unit for actuating the shooting executing means in response to the action. 3. The photographing execution means operates in response to the interlocking control means receiving a sound wave or a radio wave of a specific frequency emitted from a receiver and a transmitter provided in another monitoring device by the receiver. 2. The monitoring photography system according to claim 1, further comprising an interlocking control unit. 4. The surveillance photography system according to claim 1, wherein the crime prevention sensor is a flame sensing unit that senses that a flame has occurred within the surveillance range.