JP2000285328A - Monitoring camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively detect the change of an image pickup direction or view in an image pickup means such as a monitoring camera detecting that the direction of image picking-up in the image pickup means is changed based on the detection result of an image pickup means image picking-up direction change detection means and giving an alarm. SOLUTION: When the direction of image picking-up in one of monitoring cameras 1A-1D is changed, a vertical direction angle detection gyro sensor and/or a horizontal direction angle detection gyro sensor which is installed in the monitoring camera 1A whose image picking-up direction is changed outputs a signal corresponding to the angular velocity of the rotation. When an angular velocity signal shows the change of the angular velocity of not less than a prescribed level, a processing circuit outputs the signal to a signal transmission part by considering that the illegal turning operation of the monitoring camera 1A is executed. When the control part of a controller 2 receives the signal, it transmits the result to an alarm output part as an abnormal signal and the alarm output part outputs an abnormal state to an alarm device 4 as an alarm signal. The alarm device 4 outputs an alarm to a security center through a telephone line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera device which monitors a suspicious person's action and records it by installing a surveillance camera in a building, a store, or another place. In particular, the present invention relates to a surveillance camera device capable of detecting an improper act of preventing a suspicious person from being imaged by illegally changing the imaging direction of the surveillance camera.

2. Description of the Related Art Conventionally, a monitoring camera has been installed in a store, which is a monitoring place, or at a doorway of a store, and image data transmitted from the monitoring camera is displayed on a monitor provided in a monitoring center, or the image data is recorded. Surveillance camera devices are known as ex post facto evidence. In such a monitoring camera device, the imaging direction is adjusted so as to capture an image of a predetermined monitoring location, and the monitoring camera is fixed to a ceiling or the like using an attachment mechanism, for example.

However, in the above-described conventional surveillance camera device, for example, a person who commits wrongdoing rotates the surveillance camera by hand or the like to change the imaging direction of the surveillance camera, and removes the surveillance area from the field of view of the surveillance camera. There is a risk of cheating in the state. Since the imaging state changes due to the fraudulent act of changing the imaging direction of the surveillance camera, if the surveillance staff at the monitoring center monitors the monitor at all times, such fraudulent behavior can be noticed. Since the monitoring is not always performed, there is a case where a fraudulent act such as changing the imaging direction of the monitoring camera is not noticed. The fact that the imaging direction of the surveillance camera has been changed can be known from the recording result later, but in that case, it is often shortly after the misconduct has been performed.

[0004] Even when a monitoring person constantly monitors the monitor at the monitoring center, if the image data of a large number of monitoring cameras are sequentially switched and displayed on the monitor, such an illegal change in the imaging direction may occur. Monitoring may not be possible.

As a method of detecting such an illegal change of the imaging range, the applicant of the present invention discloses a method disclosed in Japanese Patent Application Laid-Open No. Hei 10-18594.
As disclosed in Japanese Patent Publication No. 0, a light emitting / receiving unit is provided at a part of a monitoring camera supported on a ceiling via a mounting bracket, and a reflecting unit such as a mirror is provided at a position of the ceiling facing the light emitting / receiving unit. If the direction of the surveillance camera is changed, a surveillance camera device that detects that the reflected light from the light emitting / receiving unit provided in the surveillance camera is lost and detects that the direction of the surveillance camera has been changed is provided. is suggesting.

[0006]

Problems to be Solved by the Invention Japanese Patent Laid-Open No. Hei 10-1859
In the method disclosed in Japanese Patent No. 40, it is necessary that the light emitting / receiving unit is positioned on a plane parallel to the ceiling, so that the monitoring camera is provided on the ceiling when the imaging direction of the monitoring camera has a certain angle with respect to the ceiling. The direction of the reflection unit, or the direction of the light emitting and receiving unit attached to the surveillance camera, or
It is necessary to adjust the directions of the two so that the surface of the reflection unit and the light axis of the light emitting and receiving unit are orthogonal to each other.

The present invention has been devised with a view to improving the surveillance camera device disclosed in Japanese Patent Application Laid-Open No. 10-185940, or an alternative method for the surveillance camera device disclosed in Japanese Patent Application Laid-Open No. 10-185940. It is an object of the present invention to provide a surveillance camera device that can more effectively detect a change in the imaging direction or the field of view of an imaging unit such as a surveillance camera.

[0008]

According to the present invention, an image pickup means, an attaching means for attaching the image pickup means to a fixed portion, and a movement of the image pickup means in at least one dimension are detected as an angular velocity or a change in angular velocity. A monitoring system comprising: an imaging unit imaging direction change detection unit; and an alarm output unit that detects that the imaging direction of the imaging unit has changed based on the detection result of the imaging unit imaging direction change detection unit and outputs an alarm. A camera device is provided. The imaging means imaging direction change detection means detects a change in the imaging direction of the imaging means as an angular velocity or a change in angular velocity, and confirms that an act of removing the imaging area of the imaging means such as a monitoring camera from the monitoring area has been performed. Can be detected.

Preferably, the imaging means has two gyro sensors for detecting angular velocities in directions different from each other, for example, an angular velocity in a horizontal direction and an angular velocity in a vertical direction. As a sensor used for detecting a change in angular velocity, a change in angular velocity can be detected simply by attaching it to an imaging means or the like. For example, a small gyro sensor that does not depend at all on the positional relationship with a fixed portion such as a ceiling is preferable. It is. Further, by providing two gyro sensors for detecting the horizontal angular velocity and the vertical angular velocity, it is possible to detect a three-dimensional angular velocity change.

[0010] More preferably, said attaching means includes:
Or when the applied force is released after a force is applied to the imaging means to change the imaging direction of the imaging means between the mounting means and the imaging means, or between the mounting means and the imaging means. Return means is provided for automatically returning to the original imaging direction of the imaging means. If the direction of the imaging means such as a surveillance camera is changed slowly outside the above-mentioned illegal field of view, the change by the gyro sensor is minute, and such an illegal act cannot be detected. However, when the user releases his hand after the misconduct, the return means operates, and automatically and quickly returns to the original position. Since the movement of the imaging means by the return means can be detected by the gyro sensor, it is possible to detect immediately after the misconduct has been performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a surveillance camera device according to the present invention will be described with reference to the accompanying drawings. First Embodiment FIG. 1 is an overall configuration diagram of a monitoring camera device according to a first embodiment of the present invention. The monitoring camera device includes a plurality of monitoring cameras 1
A to 1D, a controller 2 connected to the plurality of monitoring cameras 1A to 1D by coaxial cables 5A to 5D, an image recording device 3 connected to the controller 2 by a coaxial cable 6, a controller 2 and an image recording device 3 And an alarm device 4 connected to the In the present embodiment, the case where four surveillance cameras 1A to 1D are provided is exemplified, but the number of surveillance cameras is one or more, and is arbitrary.

The plurality of surveillance cameras 1A to 1D are respectively
It has an imaging function and a voice detection function, captures a predetermined monitoring area, detects an audio signal, and outputs the imaging and voice detection results to the controller 2 via the coaxial cables 5A to 5D. The controller 2 includes the monitoring cameras 1A to
The imaging and sound detection results transmitted from the 1D are signal-processed, and the results are sent to the image recording device 3. Signal processing in the controller 2 will be described later with reference to FIG. For example, the controller 2 sequentially selects the imaging result (image data) and the sound detection result (sound detection data) sent from the monitoring cameras 1A to 1D, and converts the imaging and sound detection results from the selected monitoring camera into digital signals. And sends it to the image recording device 3. The controller 2 compresses the image data and the sound detection data converted into digital signals as necessary, and sends them to the image recording device 3. The image recording device 3 records the image data and the sound detection data sent from the controller 2. The alarm device 4 processes the abnormal signal sent from the controller 2 and, when detecting that there has been an illegal act, sends an alarm signal via a telephone line to a remote security center (not shown). The alarm device 4 can also send an alarm signal to a security center (not shown) when it sends out from the image recording device 3 and processes an abnormal signal to detect that there has been an illegal act.

FIG. 2 is a diagram illustrating the mounting state of a typical surveillance camera 1A among the surveillance cameras 1A to 1D. A mounting bracket 101 is fixed to the ceiling facing downward. A shaft 102 is provided at a lower end of the mounting bracket 101. A position adjustment holder 103 is connected to the shaft 102. The mounting bracket 101, the shaft 102, and the position adjustment holder 103 are collectively referred to as a mounting mechanism or mounting means 100.

The surveillance camera 1A has an imaging section 1A1, a circuit section 1A2, and a cable 1A3. Imaging unit 1A1
Indicates the imaging direction D. A monitoring area in which, for example, an ATM is installed exists in front of the imaging direction D. In the present embodiment, surveillance camera 1A captures an image of an area where an ATM is installed as a monitoring area. Cable 1A3
Includes the coaxial cable 5A illustrated in FIG.
A power supply line for supplying power to the power supply unit of A2 is also included. Surveillance camera 1
The internal configuration of A will be described with reference to FIG.

Referring to FIG. 2, a position adjustment holder 103 is connected to one end of an upper portion of the circuit section 1A2 of the monitoring camera 1A. The position adjustment holder 1 is attached to the axis 102 so that the optical axis of the surveillance camera 1A is slightly obtuse to the vertical direction so that the surveillance camera 1A can image the above-described surveillance area.
Fix the tip of 03. The fixed angle of the position adjustment holder 103 with respect to the axis 102 defines the vertical imaging direction of the monitoring camera 1A. By adjusting the rotation angle of the position adjustment holder 103, the horizontal direction of the monitoring camera 1A can be adjusted.
Thus, the field of view of the monitoring camera 1A can be three-dimensionally adjusted by adjusting the mounting angle of the position adjustment holder 103 with respect to the shaft 102 and adjusting the rotation angle of the position adjustment holder 103.

On the other hand, if the wrongdoer changes the fixed angle of the position adjustment holder 103 with respect to the shaft 102 or changes the rotation angle of the position adjustment holder 103, the field of view of the surveillance camera 1A changes from the above-mentioned monitoring area. It will also come off. In order to detect such a change in the direction of the monitoring camera 1A, in the present embodiment, two gyro sensors, that is, a gyro sensor 13a for detecting a vertical angular velocity and a gyro sensor 13a for detecting a horizontal angular velocity are provided inside the imaging unit 1A1. Gyro sensor 13b is provided.

The gyro sensor is an angular velocity sensor that detects the vibration of a piezoelectric vibrator such as a ceramic bimorph vibrator as Coriolis force, converts the detection signal into an electric signal, and outputs the electric signal. The gyro sensor is, for example, about 8 mm in length, 15 mm in width, and about 4 mm in height, and can be easily attached to the imaging unit 1A1 of the surveillance camera 1A. Further, the gyro sensor has an advantage that it is not necessary to position the gyro sensor relative to the light emitting / receiving unit and the reflecting unit in the monitoring camera device disclosed in Japanese Patent Application Laid-Open No. 10-185940, and it is sufficient to attach it to the monitoring camera 1A. Since one gyro sensor basically detects angular velocity in one direction, two gyro sensors are required to simultaneously detect angular velocities in two directions, for example, horizontal and vertical directions. At least, in order to detect the angular velocity in one direction, for example, only one of the gyro sensor 13a for detecting the vertical angular velocity and the gyro sensor 13b for detecting the angular velocity in the horizontal direction may be provided. An example in which two gyro sensors 13a and 13b are provided will be described. In order to detect a larger angular velocity, a maximum rotational moment is generated at the position adjustment holder 103 and the connection point between the shaft 102 and the position adjustment holder 103, which are fixed and rotatable fulcrums of the monitoring camera 1A. It is preferable to provide a gyro sensor at the distal end of the imaging unit 1A1, which is the part farthest from the fulcrum, which is the part where the gyro is to be performed. In the present embodiment, near the tip of the imaging unit 1A1,
A gyro sensor 13a for detecting a vertical angular velocity and a gyro sensor 13b for detecting a horizontal angular velocity are provided. In this embodiment, the gyro sensor 13a and the gyro sensor 13b are excluded from the viewpoint of eliminating improper activities.
a and 13b are provided inside the monitoring camera 1A so that they cannot be visually recognized from the outside.

FIG. 3 is a configuration diagram of one of the monitoring cameras 1A to 1D. The monitoring cameras 1A to 1D have the same configuration. Describing the surveillance camera 1A as a representative, the surveillance camera 1A includes an imaging unit 10, a sound collection unit 11, a signal transmission unit 12, and a detection unit 13. The imaging unit 10 is located in the imaging unit 1A1 illustrated in FIG. 2 and includes a lens, a charge-coupled device (CCD), and the like, and converts an image passed through the lens into an electric signal in the CCD. Are output as image data (image data). The sound collection unit 11 is provided in the imaging unit 1A1 illustrated in FIG. 2, has a microphone, collects sound in a monitoring area, converts the sound into an electric signal, and outputs the signal as a sound detection signal. The sound collection unit 11 can be provided at an arbitrary position instead of the imaging unit 1A1. The signal transmission unit 12 is provided in the circuit unit 1A2 illustrated in FIG.
The image data output from 0 and the sound detection data output from the sound collector 11 are input, these signals are converted into predetermined output signals, and transmitted to the controller 2 via the coaxial cable 5A. The detecting unit 13 includes a vertical angular velocity detecting gyro sensor 13a and a horizontal angular velocity detecting gyro sensor 13b attached to the imaging unit 1A1 illustrated in FIG. 2 and a processing circuit 13c that processes an angular velocity signal output from these gyro sensors. It is illustrated as a collective term. In the present invention, an angular velocity itself or a signal indicating a change in angular velocity can be used as a signal for detecting a change in direction.

FIG. 4 is a block diagram of the controller 2. The controller 2 is connected to, for example, the surveillance camera 1A by a coaxial cable 5A housed inside a cable 1A3 illustrated in FIG. 2, and the controller 2 is installed at a location remote from the installation position of the surveillance camera 1A. Have been. The connection relationship between the controller 2 and the other surveillance cameras 1B to 1D is the same as above. The controller 2 includes an image processing unit 20, an image output unit 21, an operation unit 22, a control unit 23, an interface unit 24, a power supply unit 26, a power-off detection unit 27, and an alarm output unit 28. . The authentication unit 25 is provided outside the controller 2 and near the controller 2.
Is provided. The image processing unit 20 is a coaxial cable 5A
4A surveillance cameras 1A input via ~ 5D
1D is divided into four parts and compressed into one screen of image data. The image processing unit 20 selects one audio signal from the four types of audio signals according to the control signal of the control unit 23 and inputs the selected audio signal to the image output unit. The image output unit 21 outputs the four image data synthesized by the image processing unit 20 and the selected audio signal to the time lapse video device 3 via the coaxial cable 6. The operation unit 22 has switches for setting and operation instructions and the like, and is a part where the operator performs various settings and operation instructions to the controller 2 via these switches. The control unit 23 is configured by an arithmetic and control unit (CPU) of a computer, and controls the processing of the image processing unit 20 and the alarm output unit 28 based on the conditions set by the operation unit 22 and the conditions already specified. A control process and a control process of the authentication unit 25 connected via the interface unit 24 are performed. The interface unit 24 includes, for example, R
S232C, the authentication unit 25 and the control unit 23
(Signal relay) between the two. The control unit 23 cooperates with the authentication unit 25 via the interface unit 24 to perform authentication processing on the qualification of the operator who operates the controller 2 via the operation unit 22 and the like. Only the authenticated operator can perform the setting operation using the operation unit 22. The authentication unit 25 is, for example, a card reader. The interface unit 24 has a circuit configuration depending on the authentication unit 25 and adapted to the authentication unit 25. The power supply unit 26 includes the controller 2
To generate a voltage for operating an electric circuit in each electric circuit and / or an electronic circuit in each electronic circuit to supply power to each circuit inside the controller 2. The power-off detection unit 27 monitors the power supply voltage of the power supply unit 26 and detects that the voltage of the power supply unit 26 has been lost. For example, as the power-off detection unit 27, a relay that operates with the voltage of the power-supply unit 26 is used, and when the voltage of the power-supply unit 26 is lost, the alarm device 4 connected to the power-off detection unit 27 is closed by closing the contact of the relay. Power interruption of the power supply unit 26 can be detected. The alarm output unit 28 includes, for example, the cable 1 illustrated in FIG.
An alarm signal is output to the alarm device 4 illustrated in FIG. 1 when, for example, a fraudster disconnects A1 and the image data from one of the monitoring cameras 1A to 1D is cut off in the image processing unit 20.

FIG. 5 is a block diagram of the image recording apparatus 3. The image recording device 3 includes a recording unit 31, an operation unit 32, a control unit 33, an interface unit 34, a power supply unit 36, a power-off detection unit 37, and an alarm output unit 38. An authentication unit 35 is provided outside the image recording device 3. Recording unit 3
1 is a 1-compressed 1 divided by 4 received from the controller 2
Record screen image data on videotape. Operation unit 3
Reference numeral 2 performs operations such as start and stop of recording, timer operation, and attachment / detachment of a video tape. The control unit 33 is configured by an arithmetic and control unit (CPU) of the computer, and controls the operation of the recording unit 31, the alarm output unit 38, and the like. The interface unit 24 is composed of, for example, RS232C, and performs signal transmission / reception (signal relay) between the authentication unit 35 and the control unit 33. The control unit 33 cooperates with the authentication unit 35 via the interface unit 34 to perform authentication processing on the qualification of the operator who operates the image recording apparatus 3 via the operation unit 32 and the like. Only an authenticated operator can perform various setting operations on the image recording device 3 using the operation unit 32.
The authentication unit 35 is, for example, a card reader. The interface unit 34 has a circuit configuration depending on the authentication unit 35 and the control unit 33 so as to conform thereto. The power supply unit 26 generates a voltage for operating an electric circuit in each electric circuit in the image recording apparatus 3 and / or an electronic circuit in each electronic circuit, and supplies power to each circuit inside the image recording apparatus 3. The power-off detection unit 37 monitors the power supply voltage of the power supply unit 36 and detects that the voltage of the power supply unit 36 has been lost. For example, as the power-off detection unit 37, a relay that operates with the voltage of the power-supply unit 36 is used, and when the voltage of the power-supply unit 36 is lost, the alarm device 4 connected to the power-off detection unit 27 is closed by closing the contact of the relay. Power interruption of the power supply unit 36 can be detected. The alarm output unit 38 outputs an alarm signal to the alarm device 4 illustrated in FIG. 1 when, for example, the image data sent from the controller 2 to the recording unit 31 is interrupted.

The operation of the monitoring camera device according to the present embodiment will be described. In particular, a description will be given of a process in a case where the imaging direction of any one of the monitoring cameras 1A to 1D in the monitoring camera device of the present embodiment has changed. As an initial operation, the power of each unit of the monitoring cameras 1A to 1D is turned on. As a result, the monitoring cameras 1A to 1D capture images of the imaging area in the respective imaging units 10, and the imaging results are transmitted to the signal transmission unit 1
2, for example, the signal is converted into an image signal of the NTSC system and is transmitted through the coaxial cables 5A to 5D to the controller 2.
Sent to Image processing unit 20 in controller 2
Converts the four image data captured by the monitoring cameras 1A to 1D into image data of one screen. The image output unit 21 outputs the image data to the image recording device 3.

Here, when the imaging direction of any one of the monitoring cameras 1A to 1D is changed, when the imaging direction of the monitoring camera whose imaging direction is changed, for example, the monitoring camera 1A is changed, the monitoring camera 1A is changed. Figure 2 installed in
Gyro sensor 13a for vertical angular velocity detection illustrated in FIG.
Gyro sensor 1 for detecting angular velocity in horizontal direction
3b outputs a signal corresponding to the angular velocity of the rotation, and the processing circuit 13c determines that an unauthorized operation of the surveillance camera 1A has been performed when the angular velocity signal indicates a change in the angular velocity of a predetermined level or more. 12 is output.

The signal transmitting section 12 converts the detection result from the processing circuit 13c into a predetermined signal, and outputs it to the controller 2 through the coaxial cable 5A together with the image data.

The image processing unit 20 of the controller 2 receives the image data input via the coaxial cable 5A and the signal detected by the gyro sensor, and the image processing unit 20 sends the signal to the control unit 23. I do. When receiving the above signal, the control unit 23 sends the result to the alarm output unit 28 as an abnormal signal. The alarm output unit 28 outputs the abnormal state to the alarm device 4 as an alarm signal. When receiving the alarm signal, the alarm device 4 outputs an alarm to a security center (not shown) through a telephone line. As a result, the security officer at the security center is notified that the imaging direction of the surveillance camera 1A has been illegally changed, and an appropriate countermeasure can be taken promptly.

As described above, the preferred embodiment includes the gyro sensor 13a for detecting the vertical angular velocity and the gyro sensor 13b for detecting the horizontal angular velocity. Even if only one of the angular velocity detecting gyro sensors 13b is provided, at least a change in the direction in the one-dimensional direction of the monitoring camera 1A can be detected. Alternatively, the signal transmitting unit 12 may always transmit a pilot signal of a predetermined frequency to the controller 2 and stop transmitting the pilot signal when the gyro sensor detects an abnormality. In this case, the controller 2
When the pilot signal cannot be received, it is determined that the monitoring camera is abnormal, and an abnormal signal is transmitted to the alarm device 4.

The described monitoring camera apparatus according to the second embodiment of the present invention with reference to the embodiment 6 of the second embodiment. FIG. 6 is a view corresponding to FIG. 2 and showing a mounting state of a monitoring camera as a second embodiment of the present invention. The mounting state of the monitoring camera illustrated in FIG. 6 is similar to the mounting state of the monitoring camera illustrated in FIG. 2, but in FIG.
2, a return mechanism 105 is provided. That is, the mounting means 100A illustrated in FIG. 6 has a structure in which a return mechanism 105 is added to the mounting means 100 illustrated in FIG. The other components are the same as those described with reference to FIG.

FIG. 7 is a diagram illustrating the structure of the return mechanism 105 illustrated in FIG. 7A is a perspective view of the return mechanism 105, FIG. 7B is an enlarged side view of the return mechanism 105, and FIG. 7C is an exploded sectional view of the return mechanism 105. The return mechanism 105 is configured by combining an upper body 105a, a lower body 105b, and a spring 105c. Male screws project above and below the upper body 105a. The upper male screw on the upper body 105a is the mounting bracket 1
The return mechanism 105 is screwed into a female screw at the lower part of the mounting bracket 101 and fixed to the mounting bracket 101 at the lower part. A hole is provided at the center of the lower main body 105b, a female screw into which a male screw at the lower part of the upper main body 105a is screwed is formed at the upper hole of the lower main body 105b, and a shaft 102 is formed at the lower hole of the lower main body 105b. Female screw (not shown) is formed.

The spring 10 is inserted into the spring fixing hole of the upper body 105a.
5c, one end of the upper body 1 is fixed inside the spring 105c.
05a and the outer cylinder of the lower body 105b are housed,
The lower male screw of the upper main body 105a is screwed into the upper female screw of the lower main body 105b.
When the other end of the spring 105c is fixed to the screw fixing portion b, the return mechanism 105 illustrated in FIG. 7A is assembled. When a reverse rotational force is applied to the upper body 105a and the lower body 105b of the return mechanism 105, for example, the upper body 10
When a force for rotating 5a to the left L and rotating the lower body 105b to the right R is applied, the upper body 105a rotates left and the lower body 105b rotates right against the elastic force of the spring 105c. However, when the torque is released,
Due to the restoring force of the spring 105c, the upper main body 105a and the lower main body 105b instantly return to their original positions.

The return screw 105 is fixed to the lower portion of the mounting bracket 101 by screwing the upper male screw of the upper main body 105a into the lower female screw of the mounting bracket 101. Furthermore, the lower body 1
A male screw provided on the upper portion of the shaft 102 is screwed into a female screw on the lower portion of the shaft 05b to fix the shaft 102 on the lower portion of the return mechanism 105.

As described above, the return mechanism 105 is connected to the mounting bracket 10.
1 and the shaft 102, for example, a horizontal force is applied to the imaging unit 1A1 of the monitoring camera 1A to
When the direction of the image pickup 1 is changed, the spring 1 of the return mechanism 105
The direction of the imaging unit 1A1 can be changed against the elasticity of the spring 05c. However, when the imaging unit 1A1 is released, the direction of the imaging unit 1A1 quickly returns to the original state due to the restoring force of the spring 105c. At this time, the gyro sensor 13b for detecting a horizontal angular velocity in FIG. 2 detects a large angular velocity.

For example, if the wrongdoer intends to cheat, and slowly rotates the tip of the imaging unit 1A1 to remove the field of view of the surveillance camera 1A from the monitoring area, the gyro sensor 13b for detecting the angular velocity in the horizontal direction does not. In some cases, a slow change in direction cannot be detected. Then, the first
The change in the imaging area cannot be detected by the gyro sensor 13b for detecting a horizontal angular velocity described in the embodiment. However, when the cheating person releases the imaging unit 1A1, the imaging unit 1A1 instantly returns to the original direction due to the restoring force of the spring 105c of the return mechanism 105. Therefore, the gyro sensor 13b for detecting the horizontal angular velocity has a large angular velocity. To detect. The large angular velocity detected by such a horizontal angular velocity detecting gyro sensor 13b is transmitted to the signal transmission unit 12 of the monitoring camera 1A, and is reported to the controller 2,
It is possible to detect that the monitoring camera 1A has been fraudulent.

As described above, by providing the return mechanism 105, even when the change in the horizontal direction with respect to the image pickup unit 1A1 is made slow, the image pickup direction of the image pickup unit 1A1 is changed when the image pickup unit 1A1 returns thereafter. It can detect that an action has taken place.

In the above example, the return mechanism 105 is provided between the mounting bracket 101 and the shaft 102 to detect the return operation of the imaging unit 1A1 by the gyro sensor 13b for detecting the angular velocity in the horizontal direction. A new return mechanism can be provided so that the return of the change in the vertical direction is detected by the gyro sensor 13a for detecting a direction angular velocity. For example, a return mechanism (second return mechanism) similar to the above-described return mechanism 105 (first return mechanism) is rotatably mounted on the position adjustment holder 103 on both sides in a direction orthogonal to the ceiling.
In this case, the return of the imaging unit 1A1 due to the restoring force of the spring of the second return mechanism can be detected by the vertical angular velocity detecting gyro sensor 13a.

As described above, by providing the two return mechanisms to detect the vertical and / or horizontal return operation, the gyro sensor 1 for detecting the angular velocity in the vertical direction is provided.
3a and / or the horizontal angular velocity detecting gyro sensor 13b can detect such misconduct.

The implementation of the surveillance camera device of the present invention is not limited to the above-described embodiment, and various modifications can be made.

[0036]

According to the present invention, it is possible to effectively detect a change in the imaging direction or the field of view of the imaging means such as a monitoring camera.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a surveillance camera device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an attached state of a surveillance camera according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a surveillance camera.

FIG. 4 is a configuration diagram of a controller in the monitoring camera device.

FIG. 5 is a configuration diagram of an image recording device in the monitoring camera device.

FIG. 6 is a diagram illustrating an attached state of a monitoring camera according to a second embodiment of the present invention.

7 is a view illustrating the return mechanism illustrated in FIG. 6; FIG. 7A is a perspective view of the return mechanism;
FIG. 7B is an enlarged side view of the return mechanism, and FIG. 7C is an exploded cross-sectional view of the return mechanism.

[Explanation of symbols]

 1A to 1D monitoring camera 1A1 image pickup unit 1A2 circuit unit 1A3 cable 10 image pickup unit 11 sound collection unit 12 signal transmission unit 13 detection unit 13a detection of vertical angular velocity Gyro sensor 13b for gyro sensor for detecting angular velocity in horizontal direction 2 Controller 20 Image processing unit 21 Image output unit 22 Operation unit 23 Control unit 24 Interface unit 25 Authentication unit 26 ..Power supply unit 27.Power loss detection unit 28.Alarm output unit 3.Image recording device 31.Recording unit 32.Operation unit 33.Control unit 34.Interface unit 35.Authentication unit 36.・ Power supply unit 37 ・ ・ Power cut-off detection unit 38 ・ ・ Alarm output unit 4 ・ ・ Alarm device 100 ・ ・ Mounting means 101 ・ ・ Mounting bracket 102 ・ ・ Shaft 103 ・ ・ Position adjustment holder 105 ・ ・Return mechanism 105a Upper body 105b Lower body 105c Spring

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Claims (3)

[Claims] An imaging unit that attaches the imaging unit to a fixing unit; an imaging unit that detects at least one-dimensional movement of the imaging unit as an angular velocity or a change in angular velocity; A monitoring camera apparatus comprising: an alarm output unit that detects a change in the imaging direction of the imaging unit based on a detection result of the imaging unit imaging direction change detection unit and outputs an alarm. 2. The surveillance camera according to claim 1, wherein said imaging means has two gyro sensors for detecting angular velocities in directions different from each other and a vertical angular velocity. 3. After the force is applied to the imaging means to the attachment means, to the imaging means, or between the attachment means and the imaging means, and the imaging direction of the imaging means changes, The surveillance camera device according to claim 1, further comprising a return unit that automatically returns to an original imaging direction of the imaging unit when the applied force is released.