JPH07244718A - Security unit - Google Patents

Abstract

PURPOSE:To generate an alarm and start picking up an image of a trespasser by detecting a fire being caused by the trespasser even in a monitoring area where lighting environment is not excellent. CONSTITUTION:Infrared rays from the trespasser who appears in the specific monitor area are detected by a pyroelectric element 20, a detected signal T1 is inputted to a control circuit 70. The ultraviolet light from flames caused by the trespasser is detected by a photovoltaic element 40, a detected signal T2 is inputted to the control circuit 70. The microcomputer 70 outputs control signals C2-C4 and an alarm signal A0 when the detected signals are ON. Here, the illuminance of visible light in the monitor area is measured by a photoconductive element 30 and the microcomputer 70 outputs a control signal C1 when the illuminance based on a measuring signal M0 is less than a reference value B0. A CCD 60 picks up an optical image formed with the infrared rays from a halogen lamp 50 unless the lighting environment of the visible light in the monitor area is sufficient.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security unit for detecting a fire caused by arson or negligence caused by a person who has entered a predetermined surveillance area.

[0002]

2. Description of the Related Art Some conventional security units have been developed as cameras with built-in sensors. This camera with a built-in sensor is composed of a plurality of sensors, a camera, a discrimination circuit, a microcomputer, a drive circuit, a motor, a rotation mechanism and an encoder.

A plurality of sensors have different monitoring areas set as the respective sensor areas, and detect infrared rays from the human body entering the respective monitoring areas. The discriminating circuit discriminates the monitoring area in which the suspicious person is present based on the detection signal from the sensor. The microcomputer calculates the rotation angle of the camera by comparing the current imaging azimuth of the camera stored in advance with the azimuth of the surveillance area where the suspicious individual is stored based on the discrimination signal from the discrimination circuit. The drive circuit drives a motor directly connected to the rotation mechanism based on a control signal from the microcomputer to set the image pickup direction of the camera to the direction of the surveillance area in which the suspicious individual exists. The encoder detects the changed imaging direction of the camera and causes the microcomputer to store this as the current imaging direction of the camera.

With such a configuration, the camera rotates only when a suspicious person appears in each surveillance area, and tracks the suspicious person who moves between the surveillance areas. Therefore, by setting a large monitoring area as a whole with a large number of sensors,
Since the angle of view of the camera can be set narrow, an image in which the details of a suspicious person can be determined due to extremely small distortion can be obtained.

Incidentally, such a prior art is described in detail in JP-A-5-11318.

[0006]

However, in the above-mentioned conventional security unit, since unspecified behavior by a suspicious person who has entered a predetermined monitoring area is monitored, an emergency situation caused by the suspicious person is selectively detected. There is a problem that it is impossible to do. Therefore, in order to detect an emergency situation, that is, a fire caused by a suspicious person or a negligence, it is necessary for a guard or the like to constantly monitor the image from the camera displayed on the receiver such as a monitor. .

Further, since a place where the lighting environment is good such as indoors or the entrance is set as a monitoring area, in a place where no external light source for illuminating the surroundings is installed, no suspicious light is obtained at night or the like. There is a problem that it is impossible to capture the details of the person.

Furthermore, if a suspicious person appears in the surveillance area,
The camera starts imaging without discriminating whether the suspicious person is an intruder who intends to set fire or is a normal visitor. Therefore, there is a problem that power consumption for driving a camera, a monitor, etc. and a running cost required for a recording medium for recording an image of a surveillance area are large.

In view of the above, the present invention solves the above-mentioned problems and immediately generates an alarm to the outside by detecting the fire occurrence by an intruder even in a surveillance area where the lighting environment is not good, and the intruder can It is an object of the present invention to provide a security unit for starting the imaging of.

[0010]

In order to achieve the above-mentioned object, a security unit according to the present invention includes a first photodetector for detecting infrared rays from a human body that has entered a predetermined surveillance area, and the surveillance area. A second photodetector for detecting ultraviolet rays from the flame generated in the first, a third photodetector for detecting visible light based on the illuminance in the surveillance area, and a floodlight for generating infrared rays and irradiating the surveillance area. , An image pickup device that picks up an optical image formed by visible light or infrared rays from the surveillance area, and a first detection signal that detects the intrusion of the human body is input from the first photodetector, and the occurrence of flame is detected. The second detection signal is input from the second photodetector, the measurement signal for measuring the illuminance is constantly input from the third photodetector, and the first control signal for controlling to capture an optical image is input. Outputs to the image pickup device and emits infrared rays. And a control circuit for outputting a second control signal for controlling to a floodlight and an alarm signal for notifying the occurrence of fire in the monitored area to the outside, and the control circuit receives the first and second detection signals. In this case, the first control signal and the alarm signal are output, and when the illuminance based on the measurement detection signal is less than or equal to a predetermined reference value, the second control signal is output. To do.

[0011] Here, it may be characterized by further comprising a recording device for inputting a video signal obtained by capturing an optical image from the imaging device and recording the video signal on a predetermined recording medium.
Further, it may be characterized by further comprising a transmitter for inputting a video signal obtained by capturing an optical image from an imaging device, converting the video signal into a radio wave signal, and transmitting the radio signal to a predetermined receiver installed outside.

It is preferable that the first photodetector is composed of a pyroelectric element and a condenser lens arranged in a light receiving portion of the pyroelectric element. The second photodetector is preferably a photovoltaic element. The third photodetector is preferably composed of a photoconductive element and a condensing lens arranged in the light receiving portion of the photoconductive element. It is preferable that the projector includes a halogen lamp, a diffusion plate arranged in an irradiation portion of the halogen lamp, and an infrared transmission filter arranged on an irradiation surface of the diffusion plate. It is preferable that the image pickup apparatus includes a solid-state image pickup element and an optical lens system arranged in a light receiving portion of the solid-state image pickup element and including an incident light amount automatic adjustment mechanism.

[0013]

According to the security unit of the present invention, when an intruder appears in a predetermined surveillance area, the infrared light emitted from the human body is detected by the first photodetector. The first photodetector outputs a first detection signal for detecting an intruder to the control circuit. At the same time, if a fire occurs in the monitored area due to a fire or accident caused by an intruder, the second photodetector detects the ultraviolet rays emitted from the flame. The second photodetector outputs a second detection signal for detecting the flame to the control circuit. The control circuit to which the first and second detection signals are input in this way outputs an alarm signal for notifying the occurrence of a fire in the monitored area to the outside and also outputs a first control signal for operating the imaging device to the imaging device. To do.

Here, the third photodetector always detects visible light based on the illuminance in the monitored area and outputs a measurement signal for measuring the illuminance to the control circuit. In addition, the control circuit stores in advance, as data, a predetermined reference value used to determine the illumination condition of whether the illuminance of visible light in the monitored area is insufficient or sufficient.

Thus, when the illuminance based on the measurement signal is less than or equal to the predetermined reference value, the control circuit to which the first and second detection signals are input outputs a second control signal for operating the projector to the projector. To do. On the other hand, when the illuminance is larger than the predetermined reference value, the control circuit to which the first and second detection signals are input does not output the second control signal to the projector.

Therefore, when the illuminance of visible light in the surveillance area is insufficient, the projector emits infrared rays to irradiate the surveillance area, so that the imaging device takes an optical image formed by the infrared rays from the surveillance area. . On the other hand, when the illuminance of visible light in the monitored area is sufficient, the projector does not generate infrared rays, so the imaging device captures an optical image formed by visible light from the monitored area.

Therefore, the fire alarm in the surveillance area is immediately notified to the security personnel based on the alarm signal output from the control circuit to the outside, and the intruder in the surveillance area is notified based on the video signal output from the image pickup device. It is possible to obtain video images of actions and the situation of the disaster area.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of an embodiment according to the present invention will be described below with reference to FIGS. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description. Further, the dimensional ratios in the drawings do not always match those described.

FIG. 1A is a front view showing the configuration of an embodiment according to the security unit of the present invention.
FIG. 1B is a rear view showing the configuration of the embodiment shown in FIG. This security unit is a camera housing 1
It is stored as a single unit inside 0. On the front side of the camera housing 10, a condenser lens 22, a photovoltaic element 4
A 0 light receiving portion, an infrared transmission filter 51, and a camera window glass 61 are arranged. On the other hand, the camera housing 10
Power switch 11 and video output terminal 1 on the back side of
2, an AC (alternating current) input terminal 13 and a video tape exchange section 14 are arranged.

FIG. 2 is a side sectional view showing the construction of the embodiment shown in FIG. Inside the camera housing 10, behind the condenser lens 22, drive circuits 21 and 31 are arranged with their ends fixed to the side wall of the camera housing 10. The drive circuits 21 and 31 include the pyroelectric element 20.
And a photoconductive element 30 are respectively installed. A drive circuit 41 in which the photovoltaic element 40 is installed is arranged with its end fixed to the side wall of the camera housing 10. A diffusion plate 52 is attached to the back surface of the infrared transmission filter 51, a lamp house 53 is provided with an irradiation portion behind the diffusion plate 52, and the bottom portion thereof is fixed to the bottom wall of the camera housing 10. An optical lens system 62 has its entrance portion installed on the back surface of the camera window glass 61, and its exit portion is a CCD.
(Solid-state image sensor) 60 is fixedly arranged on the light receiving portion. The CCD 60 has an end portion in the camera housing 1
It is fixedly arranged on the side wall of 0. A microcomputer 70 is disposed between the lamp house 53 and the CCD 60 with its bottom fixed to the bottom wall of the camera housing 10. Behind the lamp house 53, the CCD 60 and the microcomputer 70, a VTR (video tape recorder) 80 is provided at the bottom of the camera housing 10.
It is fixedly installed on the bottom wall of. A transmitter 90 is arranged above the VTR 80 with its upper part fixed to the upper wall of the camera housing 10.

FIG. 3 is a sectional view showing a detailed structure inside the lamp house 53 in the embodiment of FIG. The outer wall of the lamp house 53 is composed of a heat dissipation plate 54. A lamp window glass 55 is installed in the irradiation section of the lamp house 53. A reflecting mirror 56 is installed inside the heat dissipation plate 54. A lamp socket 57 is arranged at the center of the reflecting mirror 56 with its end fixed inside the reflecting mirror 56. A halogen lamp 50 is installed at the mounting portion of the lamp socket 57. A diffusion plate 52 is installed on the back surface of the infrared transmission filter 51.

The camera housing 10 is made of a metal or plastic material having excellent rustproof properties, and is formed into a hollow, substantially rectangular parallelepiped shape. However, on the front side, the upper part and the side part are extended and shaped like eaves. Regarding the size of this camera housing 10, the total width L ₁ is about 130 m.
m, the total height L ₂ is about 95 mm, and the depth L at the bottom is
₃ is about 200 mm and the upper depth L ₄ is about 240 m
m.

The first photodetector comprises a condenser lens 22, a pyroelectric element 20 and a drive circuit 21. The condensing lens 22 is composed of a Fresnel lens or the like, and condenses infrared rays and visible light emitted from a predetermined monitoring area. The pyroelectric element 20 is a device that outputs, as a signal, a change in spontaneous polarization caused by a temperature rise due to absorption of infrared rays in a pyroelectric material made of Pb (TiZr) O ₃ -based or PbTiO ₃ -based ceramics. The pyroelectric element 20 has a high sensitivity to the mid-infrared rays having a wavelength of about 4.5 to 20 μm emitted by the human body, detects infrared rays from the condenser lens 22, and appears an intruder in the surveillance area. To detect.

The second photodetector is composed of a photovoltaic element 40 and a drive circuit 41. The photovoltaic element 40 is a device that gas-amplifies a photoelectric effect of metal due to absorption of ultraviolet rays and outputs it as a signal. The photovoltaic element 40 is, for example, a UVtron (R2868 manufactured by Hamamatsu Photonics) having a high sensitivity to ultraviolet rays having a wavelength of about 180 to 230 nm which is not included in sunlight, and detects the ultraviolet rays emitted from the monitoring area. Detect the occurrence of flames in the surveillance area.

The third photodetector is composed of a condenser lens 22, a photoconductive element 30, and a drive circuit 31. The photoconductive element 30 is a device that outputs, as a signal, a variation in resistance value due to absorption of visible light in a photoconductive material such as CdS. The photoconductive element 30 has a high sensitivity to visible light contained in sunlight and has a condensing lens 2
The visible light from 2 is detected to detect the illuminance of sunlight or the like in the monitoring area.

The projector comprises a halogen lamp 50 and a reflecting mirror 5.
6, lamp house 53, heat sink 54, lamp window glass 5
5, the diffusion plate 52 and the infrared transmission filter 51. The halogen lamp 50 is a lamp that emits light containing a large proportion of infrared rays. This halogen lamp 5
0 produces the amount of light that enables imaging of the surveillance area at a maximum distance of 15 m from the installation site. The reflecting mirror 56 is made of a metal having good heat conductivity such as aluminum, and is formed to have a concave surface. This reflecting mirror 56 reflects the light from the lamp to reflect the lamp window glass 55.
Focus on. The lamp house 53 is made of a metal having good heat conductivity such as aluminum, and is formed into a hollow rectangular parallelepiped shape. The heat dissipation plate 54 is formed to have a large number of protrusions protruding outward so as to expand the surface area of the lamp house 53, and radiates heat from the halogen lamp 50 to naturally cool the inside of the lamp house 53. The lamp window glass 55 is made of synthetic quartz or the like that transmits near infrared rays having a wavelength of about 2.7 μm or less and is excellent in heat resistance, and removes far infrared rays from the light from the halogen lamp 50 to exert a thermal stress on the infrared transmission filter 51. To reduce.

The diffusion plate 52 is made of tracing paper or the like having a layer thickness of about 0.5 mm.
Diffuse light from 5. This diffuser plate 52 sets the light intensity in a region corresponding to the peripheral portion of the halogen lamp 50 to a substantially uniform light intensity by suppressing the light intensity in the region corresponding to the filament portion of the halogen lamp 50, and the light is seen from the outside. To make the filament portion of the halogen lamp 50 inconspicuous. The infrared transmission filter 51 is, for example, an absorption type infrared transmission filter (IR-85 made by HOYA) having a layer thickness of about 4 mm and transmitting infrared rays. The infrared transmission filter 51 detects a wavelength of about 7 from the light from the diffusion plate 52.
Visible light having a wavelength of 80 nm or less is removed to make the light emission of the halogen lamp 50 invisible when seen from the outside. Since the layer thickness of the infrared transmission filter 51 is an absorption type, the heat capacity is increased so as not to be crushed by thermal stress, and the visible light is not transmitted because the transmission characteristic D range is wide with respect to the incident wavelength. Is set relatively large. Since the distance L ₅ between the infrared transmission filter 51 and the lamp window glass 55 is about 20 mm, the thermal stress exerted on the infrared transmission filter 51 by the light from the halogen lamp 50 is reduced. The irradiation area of the lamp house 53 is set so as to coincide with the imaging area of the CCD 60 by one-touch operation of a lever (not shown).

The image pickup device comprises a camera window glass 61, an optical lens system 62 and a CCD 60. The camera window glass 61 is made of quartz glass having a low reflectance for visible light and infrared light, and transmits visible light and infrared light from the surveillance area so that the presence of the security unit is inconspicuous when viewed from the outside. The optical lens system 62 is an optical lens group including an incident light amount automatic adjustment mechanism (auto iris), and forms an image of the light from the camera window glass 61 to form an optical image of the monitoring area. The CCD 60 is a camera having a high sensitivity to visible light and infrared rays, and outputs an optical image from the optical lens system 62 as a video signal composed of a composite video (composite video) signal and an audio signal. This CCD 60 can be used in the darkness at night, even if the illuminance of visible light in the surveillance area is 0 lux.
It provides clear image quality due to infrared irradiation by the halogen lamp 50.

The control circuit is composed of the microcomputer 70 and controls the entire operation of the security unit. The recording device is composed of VTR80, and C
The video signal from the CD 60 is recorded on a recording medium such as a video tape having a built-in signal. This VTR 80 is an 8 mm VTR, and performs recording for a maximum of 180 minutes in the standard recording mode.
The transmitter 90 is a wireless transmitter that converts a composite video signal and an audio signal into an RF-TV signal and broadcasts it in the air. The transmitter 90 converts a video signal from the CCD 60 into a radio wave signal and transmits it to an external receiver or the like. To do. However, in the transmitter 90, the transmission frequency is set to an empty channel of TV-UHF, and the transmission output is set to a value less than the value specified by the Radio Law, so the transmission distance is approximately 100 m or less.

The AC input terminal 13 is connected to the camera housing 1
0 is connected to each electronic device represented by a microcomputer 70 arranged inside 0, and electric power is supplied from an external power supply. The power switch 11 disconnects and connects the power supply from the external power supply. The video output terminal 12 is
It is connected to an external receiver or the like and outputs a video signal reproduced from a recording medium such as a video tape built in the VTR 80 to the outside. The video tape exchange unit 14 is an opening / closing unit that exchanges a recording medium such as a video tape with respect to the VTR 80.

FIG. 4 is a block diagram showing the arrangement of internal processing in the above embodiment. The pyroelectric element 20 operates by receiving the drive signal D ₁ from the drive circuit 21, receives infrared rays from the monitoring area through the condenser lens 22, and outputs the output signal S ₁ to the drive circuit 21. To do. The drive circuit 21 is
The drive signal D ₁ is output to the pyroelectric element 20, and the output signal S ₁ from the pyroelectric element 20 is input to output the detection signal T ₁ to the microcomputer 70.

The photoconductive element 30 operates by receiving the drive signal D ₀ from the drive circuit 31, receives the visible light from the monitored area through the condenser lens 22, and outputs the output signal S to the drive circuit 31. Outputs ₀ . The drive circuit 31 includes the photoconductive element 30.
The drive signal D ₀ and the output signal S ₀ from the photoconductive element 30 are input to the microcomputer 70.
The measurement signal M ₀ is output to.

The photovoltaic element 40 receives the ultraviolet rays from the monitored area and outputs the output signal S ₂ to the drive circuit 41. The drive circuit 41 outputs the drive signal D ₂ to the photovoltaic element 40, inputs the output signal S ₂ from the photovoltaic element 40, and outputs the detection signal T ₂ to the microcomputer 70.

In the microcomputer 70, whether the illuminance of visible light in the monitoring area is insufficient in advance,
Alternatively, a predetermined reference value B ₀ used for determining whether the lighting condition is sufficient is stored as data. The microcomputer 70 includes detection signals T ₁ and T ₂ from the drive circuits 21 and 41 and a measurement signal M from the drive circuit 31.
₀ is input respectively, and the level of the measurement signal M ₀ is set to the reference value B
Determined by comparing with ₀ . Here, when it is determined that the level of the measurement signal M ₀ exceeds the reference value B ₀ , the halogen lamp 50, the CCD 60, the VTR 80, and the transmitter 90 receive control signals C ₁ , C ₂ , C ₃ (REC signal) and While outputting C ₄ respectively, it outputs an alarm signal A ₀ to the outside. On the other hand, when it is determined that the level of the measurement signal M ₀ is equal to or lower than the reference value B ₀ , the control signals C ₂ , C ₃ and C ₄ are output to the CCD 60, the VTR 80 and the transmitter 90, respectively, and the alarm signal A ₀ is output. Output to the outside. Further, the microcomputer 70 has a built-in timer, and the control signal C ₁ , after a lapse of a fixed time, for example, 2 minutes, after the input of at least one of the detection signals T ₁ and T ₂ is stopped.
The outputs of C ₂ , C ₃ and C ₄ are all stopped.

The halogen lamp 50 operates by receiving the control signal C ₁ from the microcomputer 70, and irradiates the monitoring area with infrared rays through the infrared transmission filter 51 and the like. The CCD 60 operates by receiving the control signal C ₂ from the microcomputer 70, receives visible light and infrared rays from the monitored area through the optical lens system 62 and the like, and outputs V.
The video signal V ₀ is output to the TR 80 and the transmitter 90, respectively. The VTR 80 operates by receiving the control signal C ₃ from the microcomputer 70, inputs the video signal V ₀ from the CCD 60 and records it on the recording medium, and outputs the video signal V ₂ reproduced from the recording medium to the outside. To do. The transmitter 90 is a control signal C from the microcomputer 70.
₄ is input to operate, and the video signal V ₀ from the image pickup device 60 is input.
Is input and converted into a radio signal V ₁ and transmitted to an external receiver.

FIG. 5 is a block diagram showing a form of use in which the above embodiment is provided. The security unit 100 of the above embodiment is arranged, for example, near the outer wall of the building 120 facing the building 121. The light receiving areas of the pyroelectric element 20, the photoconductive element 30, and the photovoltaic element 40, the irradiation area of the projector 50, and the imaging area of the imaging device 60 are set in the monitoring area 130 including the surrounding area of the building 121. It Here, the security unit 100 waits until an intruder 131 appears in the surveillance area 130 and a fire occurs in the building 122 or the like due to arson or an accident. Then, the security unit 100 that has detected the appearance of the intruder 131 and the occurrence of the fire is
The image showing the situation of the damage area 1 and the disaster-affected area 122 is recorded in the recording device 80 and transmitted to the receiver 110 such as a monitor installed outside.

Next, the operation of the above embodiment will be described. FIG. 6 shows (a) measurement signal M ₀ , (b) detection signal T ₁ , (c) detection signal T ₂ , of the control circuit in the above embodiment.
(D) the control signal C ₂ -C _4, a timing chart showing the (e) control signal C _1. The time t ₀ ~t ₄ shows the daytime, time t ₄ ~t ₈ shows a night.

In the security unit 100, the drive circuits 21, 31 and 41 are always driven by the drive signals D ₁ , D ₂ and D.
By outputting ₃ respectively, the pyroelectric element 20, the photoconductive element 30, and the photovoltaic element 40 are operating. Here, when an intruder 131 appears in the surveillance area 130, infrared rays emitted from the human body are detected by the pyroelectric element 20 via the condenser lens 22. Since the pyroelectric element 20 outputs the output signal S ₁ to the drive circuit 21, the drive circuit 21 outputs the detection signal T ₁ which detects the appearance of the intruder 131 in the surveillance area 130 to the microcomputer 70. When the detection signal T ₁ is in the on state but the detection signal T ₂ is in the off state as in the case of the time t ₁ in the daytime and the time t _{5 in} the nighttime, the microcomputer 70 outputs the control signal C.
Does not output any of _{1 to} C ₄ .

At the same time, when the intruder 131 causes a fire in the surveillance area 130 due to a fire or an accident, the ultraviolet rays emitted from the flame are detected by the photovoltaic element 40.
Since the photovoltaic element 40 outputs the output signal S ₂ to the drive circuit 41, the drive circuit 41 informs the microcomputer 70 of the detection signal T ₂ that has detected the occurrence of a fire in the monitoring area 130.
Is output. The microcomputer 70 detects the detection signal T ₁ as in the case of the time t ₂ in the daytime and the time t _{6 in} the nighttime.
And T ₂ are in the on state, the control signals C _{2 to} C ₄ and the alarm signal A ₀ are output.

The visible light emitted from the monitoring area 130 is detected by the photoconductive element 30. Photoconductive element 30
Outputs an output signal S ₃ to the drive circuit 31, the drive circuit 31 outputs to the microcomputer 70 a measurement signal M ₀ for measuring the illuminance in the monitoring area 130. The microcomputer 70 compares the level of the measurement signal M ₀ with a reference value B ₀ stored in advance and compares it with the time t ₂ in the daytime.
When the level of the measurement signal M ₀ is in the off state of the reference value B ₀ or less as in the case of ₁ , the illuminance of visible light in the monitoring area 130 is determined to be sufficient, and the control signal C ₁ is not output. On the other hand, when the level of the measurement signal M ₀ exceeds the reference value B ₀ and is in a large on state as in the case of time t ₆ at night, it is determined that the illuminance of visible light in the monitoring area 130 is insufficient. , Control signal C ₁ is output.

As a result, in the daytime or in the monitoring area 1
When the illumination environment of visible light in 30 is sufficient, the halogen lamp 50 does not operate because the control signal C ₁ is not input, and the CCD 60, the VTR 80, and the transmitter 90 operate by inputting the control signals C _{2 to} C ₄ , respectively. To do. Therefore, C
The CD 60 captures an optical image formed by visible light from the monitoring area 130 via the optical lens system 62 and outputs a video signal V ₀ to the VTR 80 and the transmitter 90, respectively. On the other hand, at night or when the illumination environment of the visible light in the surveillance area 130 is insufficient, the halogen lamps 50, C
CD 60, VTR 80 and transmitter 90 control signals C ₁ ~
Operate by inputting C ₄ respectively. Therefore, since the halogen lamp 50 irradiates infrared rays to the monitoring area 130 via the infrared transmission filter 51 or the like, the CCD 60 captures an optical image of infrared rays from the monitoring area 130 via the optical lens system 62 or the like, and the VTR 80. And the video signal V ₀ to the transmitter 90, respectively.

Therefore, the video signal V ₀ is sent to the VTR 80.
Is input, and an image of the behavior of the intruder 131 in the surveillance area 130 and the situation of the disaster area 122 is recorded on a recording medium such as a built-in video tape. Further, the video signal V ₀ is input to the transmitter 90, and the radio signal V ₁ obtained by converting the video signal V ₀ is transmitted to the external receiver 110. Then, in the receiver 110 installed at a remote place from the disaster-stricken part 122,
Behavior of intruders 131 in the surveillance area 130 and the affected areas 1
A video image of the situation of 22 is displayed. further,
Since the alarm signal A ₀ is output to the outside, a security guard or the like is immediately notified of the fire occurrence.

Here, in the microcomputer 70, after neither of the detection signals T ₁ and T ₂ is input,
When the built-in timer starts counting and a certain time has passed,
For example, the output of the control signals C ₁ , C ₂ , C ₃ and C ₄ is stopped as in the case of the time t _{3 in the} daytime and the time t _{7 in} the nighttime. Therefore, intruders 131 in the surveillance area 130
When neither flame nor flame is present, halogen lamp 50, CCD
The operation of 60, VTR 80 and transmitter 90 will stop. Therefore, the halogen lamp 50, CCD 60, V
The operation of the TR 80 and the transmitter 90 does not stop.

The present invention is not limited to the above embodiment, but various modifications can be made.

For example, in the above embodiment, both the VTR 80 and transmitter 90 are located inside the camera housing. However, even if only one of the VTR 80 and the transmitter 90 is installed, the same operation and effect as in the above embodiment can be obtained.

Further, in the above-mentioned embodiment, it is mainly assumed that the device is installed indoors or outdoors during fine weather. Furthermore, by using a rain-proof type camera housing or attaching a wiper, a defroster, or the like, it is possible to set the installation place of the device outdoors under all weather conditions.

In the above embodiment, one light projector is built in. In addition, even if multiple illuminators manufactured with the same type of structure are installed individually outside and connected so that control signals are input from the control circuit, it is possible to monitor even when the illuminance of visible light is not sufficient at night. Long-distance imaging of the area can be performed. At this time, by using a zoom lens (C mount) as an optical lens system attached to the image pickup apparatus, the angle of view of the image pickup apparatus is appropriately set.

Further, in the above-mentioned embodiment, the operation of the image pickup device and the recording device is set to start when an intruder appears in the surveillance area and causes a fire. However, even if the image pickup device is set to always operate and the operation of the recording device is started when an intruder appears in the surveillance area and a fire occurs, the same effect as the above embodiment is obtained. Is obtained.

[0049]

As described above in detail, in the security unit according to the present invention, when an intruder appears in a predetermined surveillance area, the infrared light emitted from the human body is detected by the first photodetector. Therefore, the first detection signal for detecting the intruder is input to the control circuit. At the same time, if a fire occurs in the surveillance area due to a fire or accident caused by an intruder, the ultraviolet light emitted from the flame is detected by the second photodetector, so the second detection signal that detects the flame is generated. Input to control circuit. Therefore, in the control circuit, an alarm signal for notifying the occurrence of a fire in the monitored area is output to the outside, and a first control signal for operating the imaging device is output to the imaging device.

Here, since the visible light based on the illuminance in the monitored area is constantly detected by the third photodetector, the measurement signal for measuring the illuminance is input to the control circuit. Therefore, in the control circuit, when the illuminance based on the measurement signal is equal to or less than the predetermined reference value, the second control signal for operating the light projector is output to the light projector. On the other hand, if the measurement signal is larger than the predetermined reference value, the second control signal is not output to the projector. As a result, in the imaging device, when the illuminance of visible light in the surveillance area is insufficient, the infrared rays from the light projector irradiate the surveillance area, so an optical image formed by the infrared rays from the surveillance area is captured. On the other hand, when the illuminance of visible light in the surveillance area is sufficient, an optical image formed by the visible light from the surveillance area is captured.

Therefore, according to the present invention, a security officer or the like is immediately notified of the occurrence of a fire in the monitored area based on the alarm signal output to the outside, and the security officer is displayed on a receiver such as a monitor. It is not necessary to constantly monitor the image of the surveillance area. Further, even if the illumination environment in the surveillance area is insufficient, infrared rays are emitted from the projector to the surveillance area, so that an image in which the details of the suspicious person who has invaded the surveillance area can be obtained in good condition can be obtained. Also, when a suspicious person enters the surveillance area and causes a fire, imaging of the suspicious person is started, so running costs for driving a camera, a monitor, etc. and recording video are reduced. It

Furthermore, since the device according to the present invention is miniaturized, it requires only a very small area for installation. Since a telephoto lens can be installed as an optical lens system attached to the image pickup apparatus, it is possible to select an installation location apart from the surveillance area. Therefore, it is difficult for an intruder to detect the installation of the device. Also, since the infrared light from the projector has a sufficient amount of light and the visible light is sufficiently removed, the image quality is sufficient to prove the intruder himself without the intruder sensing the image. Imaging is performed.

[Brief description of drawings]

FIG. 1A is a front view showing a configuration of an embodiment according to a security unit of the present invention, and FIG. 1B is a rear view showing a configuration of the embodiment of FIG.

FIG. 2 is a side sectional view showing the configuration of the embodiment shown in FIG.

FIG. 3 is a sectional view showing a detailed structure inside the lamp house in the embodiment of FIG.

FIG. 4 is a block diagram showing a configuration of internal processing in the embodiment of FIG.

FIG. 5 is a configuration diagram showing a usage pattern in which the embodiment of FIG. 1 is deployed.

6A is a diagram illustrating a measurement signal M ₀ , FIG. 6B is a detection signal T ₁ , FIG. 6C is a detection signal T ₂ , and FIG.
(D) the control signal C ₂ -C _4, a timing chart showing the (e) control signal C _1.

[Explanation of symbols]

10 ... Camera housing, 11 ... Power switch, 12 ...
Video output terminal, 13 ... AC input terminal, 14 ... Video tape exchange section, 20 ... Pyroelectric element, 21 ... Drive circuit, 22
... condenser lens, 30 ... photoconductive element, 31 ... drive circuit,
40 ... Photovoltaic element, 41 ... Driving circuit, 50 ... Halogen lamp, 51 ... Infrared transmitting filter, 52 ... Diffusing plate, 53
... Lamp house, 54 ... Heat sink, 55 ... Lamp window glass, 56 ... Reflector, 57 ... Lamp socket, 60 ... CC
D, 61 ... Camera window glass, 62 ... Optical lens system, 70
... Microcomputer, 80 ... VTR, 90 ... Transmitter, 100 ... Security unit, 110 ... Receiver,
120, 121 ... Building, 122 ... Disaster area, 130 ... Monitoring area, 131 ... Intruder.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G08B 13/196 4234-5G H04N 7/18 D G06F 15/64 F

Claims (8)

[Claims] 1. A first photodetector for detecting infrared rays from a human body that has entered a predetermined monitoring area, and a second photodetector for detecting ultraviolet rays from a flame generated in the monitoring area.
Photodetector, a third photodetector for detecting visible light based on illuminance in the monitored area, a floodlight for generating infrared light and irradiating the monitored area, and visible light or infrared light from the monitored area An image pickup device for picking up an optical image formed by, and a first detection signal for detecting the intrusion of the human body is input from the first photodetector, and a second detection signal for detecting the occurrence of the flame is generated. A measurement signal that is input from the second photodetector and that measures the illuminance is constantly input from the third photodetector, and a first control signal that controls to capture the optical image is captured. A control circuit for outputting a second control signal to the device for controlling to generate the infrared ray, and for outputting an alarm signal for notifying a fire occurrence in the monitored area to the outside. The circuit is the first and The first control signal and the alarm signal are output when a second detection signal is input, and the second control signal is output when the illuminance based on the measurement detection signal is equal to or less than a predetermined reference value. A security unit that is configured to output. 2. The recording apparatus further comprises a recording device which receives a video signal obtained by capturing the optical image from the imaging device and records the video signal on a predetermined recording medium.
The listed security unit. 3. A transmitter is further provided, which receives a video signal of the optical image input from the imaging device, converts the video signal into a radio signal, and transmits the radio signal to a predetermined receiver installed outside. The security unit according to claim 1. 4. The first photodetector comprises a pyroelectric element,
The security unit according to claim 1, wherein the security unit comprises a condensing lens arranged in a light receiving portion of the pyroelectric element. 5. The security unit according to claim 1, wherein the second photodetector is a photovoltaic element. 6. The third photodetector includes a photoconductive element,
The security unit according to claim 1, wherein the security unit comprises a condensing lens arranged in a light receiving portion of the photoconductive element. 7. The light projector comprises a halogen lamp, a diffusion plate arranged in an irradiation portion of the halogen lamp, and an infrared transmission filter arranged in an irradiation surface of the diffusion plate. The security unit according to claim 1. 8. The image pickup apparatus comprises a solid-state image pickup device and an optical lens system arranged in a light-receiving portion of the solid-state image pickup device and including an incident light amount automatic adjustment mechanism. The listed security unit.