JPH11308603A - Monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the small-sized monitoring system with a simple configuration by providing a reflection means that reflects the image of a monitored object within a monitoring area freely tiltably and making the reflected image by this reflection means incident onto a camera for image pickup. SOLUTION: Part of the side face of a case 1 placed on a ceiling T of a monitoring area A consists of a cover 1a that is made of a transparent material. The inside of the case 1 is provided with a Galvano mirror G which is a reflecting means, a drive circuit 2 for the Galvano mirror G, a CCD camera 3 that picks up images an image via the Galvano mirror G, and a processing unit 4 that controls the Galvano mirror G and the CCD camera 3. The Galvano mirror G is configured so that a tilt of a reflected face can be arbitrarily changed by supplying a current to a coil from the drive circuit 2 and causing a torque to a plate around X, Y-axes. Thus, an operation section is operated to adjust a tilt state, in matching with a motion of an intruder B via the drive circuit 2 so as to monitor the intruder B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a monitoring device, and more particularly to a monitoring device using a television camera.

[0002]

2. Description of the Related Art Conventionally, this type of monitoring apparatus has a television camera (video camera) (hereinafter, referred to as "camera") in a monitoring area, and displays images taken by the camera on a display screen provided in a management room. Or a video tape.

[0003] In the monitoring apparatus using the above-mentioned conventional camera, when the monitoring range is expanded, the camera is rotated periodically or is rotated by remote control from a management room.

[0004]

However, in the above-described monitoring apparatus using a camera, since the camera itself is provided to be exposed to a monitoring area, the monitoring area is imaged for a customer such as a store. However, there is a drawback that makes the customer uncomfortable.

Further, when the monitoring area is for monitoring a restricted area, the blind spot of the camera may be known to an intruder.

In order to prevent such inconvenience, it is conceivable to install the camera body in a housing. However, the camera body is large, and when the camera body is of a rotary type, it becomes larger. There is a drawback that the housing for storing is large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a miniaturized monitoring device having a simple configuration.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, a monitoring device according to the present invention is provided with a reflecting means which is tiltably provided for reflecting an image of an object to be monitored in a monitoring area, and the reflecting means. And an image pickup means for picking up an image reflected by the image pickup device. Further, a tilt control means for controlling the tilt of the reflection means in accordance with the movement of the image of the monitoring target is provided. Further, the present invention is characterized in that an image reflected by the reflecting means is reflected by a fixed fixed reflecting means and then imaged. Further, the reflection means is a galvanometer mirror.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a monitoring device when monitoring a monitoring area A set as a no-entry area.

In FIG. 1, reference numeral 1 denotes a housing provided on a ceiling T of a monitoring area (monitoring area) A, and a part of a side surface of the housing 1 is formed of a cover 1a made of a light transmitting material. I have.

The housing 1 can use a part of an air conditioner installed on the ceiling T. In any case, it is devised that the intruder A who has entered the monitoring area A is not informed of the installation of the monitoring device.

In a housing 1, a galvanomirror G, a driving circuit 2 for the galvanomirror G, a CCD camera 3 for taking an image via the galvanomirror G, and a processor for controlling the galvanomirror G and the CCD camera 3 4 are provided.

[0013] As shown in FIG.
Amplifying circuit 4a for amplifying image data of D camera 3
And a communication control unit 4b for communicating with the management room R (not shown)
Are provided.

In the control room R, a communication control unit 10a for communicating with the housing 1 side, a display screen 10b for displaying an image captured by the CCD camera 3, and a drive circuit 2 for the galvanometer mirror G
And an operation unit 10c composed of a numeric keypad for controlling the operation. Although a video device for recording data captured by the CCD camera 3 is provided in the management room R, it is omitted here.

FIG. 3 is a schematic diagram showing the configuration of the galvanometer mirror G. The applicant of the present invention has previously disclosed in JP-A-7-175005 and JP-A-7-175.
Since this is proposed in Japanese Patent Publication No. 218857, etc., a detailed explanation is given to these prior applications. However, when a current is applied from the drive circuit 2 to the coils C1 and C2, the galvanomirror G becomes a mirror M (the reflecting means of the present invention). A torque is generated about the X-axis and the Y-axis on the plate P on which the mirror M is stretched, and the inclination of the reflection surface of the mirror M can be arbitrarily changed.

In FIG. 3, a magnet for generating a magnetic field for giving a rotational force to the play P is omitted for simplification of the drawing. However, in this galvanomirror G, the coils C1 and C2 are also provided. The principle of a galvanomirror that generates a rotating force on the plate P by a current applied to the plate P and a magnetic field generated by a magnet is adopted.

In the monitoring apparatus having the above-mentioned configuration, when an intruder A enters the monitoring area A, the intruder A (corresponding to the object to be monitored in the present invention) A receives the CCD camera 3 via the mirror M of the galvanomirror G. Is imaged. This CCD camera 3
The image data picked up by the communication control units 4a and 10a
Is displayed on the display screen 10b via the.

The administrator (not shown) of the management room R operates the operation unit 1
By operating 0c, the tilting state of the mirror M can be adjusted via the drive circuit 2 in accordance with the movement of the intruder A, and the intruder A can be monitored.

FIG. 4 shows that the movement of the intruder A can be automatically tracked by using the tracking means 20. That is,
The tracking means 20 includes a memory 21 for recording image data picked up by the CCD camera 3 in a FILO manner, image data stored in the memory 21 a predetermined time (for example, one second) before, and current image data. , That is, a change in the image data of the intruder A, and a comparison circuit 22 that can output a control signal to the drive circuit 2 if there is a difference equal to or more than a predetermined value.

Therefore, the tracking means 20 includes the comparing circuit 2
When the intruder 2 detects the movement of the intruder A, it can output a control signal to the drive circuit 2 so as to control the tilt of the mirror M in accordance with the movement. For this reason, the monitoring device can automatically track the intruder A.

FIG. 5 shows an image captured by the CCD camera 3 reflected by a fixed mirror (corresponding to the fixed reflecting means of the present invention) 30. As described above, when the fixed mirror 30 is used, the CCD camera 3 can be mounted at an arbitrary position of the housing 1 (omitted in FIG. 5).

FIG. 6 shows a monitoring apparatus for monitoring the traffic condition of vehicles (which are objects to be monitored according to the present invention, which are omitted in FIG. 6) in two directions at a road intersection by using two fixed mirrors described above. ing.

In FIG. 6, the galvanomirrors G and C
Although an example is shown in which a CD camera or the like is provided at the center of the intersection, this is for convenience of explanation, and is actually provided at the location shown in FIG. When it is necessary to monitor the traffic conditions on the right and lower roads in FIG. 6, a similar device is installed at the location in FIG.

The monitoring device for traffic monitoring shown in FIG.
By tilting the two fixed mirrors 30a and 30b and the mirror M of the galvanometer mirror G, traffic conditions in both directions can be monitored by one CCD camera.

[0025]

According to the present invention, there is provided a surveillance device which is provided with a tilting means for reflecting an image of an object to be monitored in a surveillance area, and an image pick-up for receiving an image reflected by the reflecting means. Therefore, a miniaturized monitoring device can be realized. When a tilt control unit that controls the tilt of the reflection unit in accordance with the movement of the image of the monitoring target is provided, automatic tracking can be realized. Further, when the image reflected by the reflecting means is reflected by the fixed fixed reflecting means, the mounting of the imaging means can be facilitated. When the reflecting means is a galvanomirror, it can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram when a monitoring device of the present invention is a monitoring device that monitors an intruder.

FIG. 2 is a block diagram of a monitoring device.

FIG. 3 is a schematic configuration diagram of a galvanomirror.

FIG. 4 is a schematic configuration diagram of a tracking unit.

FIG. 5 is an explanatory diagram when a fixed mirror is used.

FIG. 6 is a schematic configuration diagram when the monitoring device of the present invention is applied to an intersection monitoring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 1a Cover 2 Drive circuit 3 CCD camera (imaging means) 4 Processor 4a, 10a Communication control part 10b Display screen 10c Operation part G Galvano mirror M Mirror (reflecting means) 20 Tracking means 21 Memory 22 Comparison circuit 30, 30a , 30b Fixed mirror (fixed reflecting means)

Claims (4)

[Claims] 1. A tilting means for reflecting an image of an object to be monitored in a monitoring area, the reflecting means being tiltably provided, and an image pickup means for receiving an image reflected by the reflecting means and picking up an image. And monitoring equipment. 2. The monitoring apparatus according to claim 1, further comprising tilt control means for controlling tilt of the reflection means in accordance with movement of the image of the monitoring target. 3. The monitoring apparatus according to claim 1, wherein an image reflected by the reflection unit is imaged after being reflected by the fixed fixed reflection unit. 4. The monitoring device according to claim 1, wherein the reflection unit is a galvanometer mirror.