JP3278085B2 - Surveillance camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera.

[0002]

2. Description of the Related Art Conventionally, a surveillance camera equipped with a television camera (hereinafter simply referred to as a camera) and a hot-wire sensor has been known. In such a surveillance camera, when a hot-wire sensor issues an alarm, that is, a hot-wire sensor When a signal indicating the presence of an intruder is output from the camera, the video signal from the camera is output to a monitor or the like disposed in a predetermined department such as a monitoring center.

[0003]

In the above-described surveillance camera, a video signal from the camera is output to a monitor or the like when a hot-wire sensor issues an alarm. The intruder must be captured in the captured image, and therefore, the field of view of the heat ray sensor, that is, the alert area of the heat ray sensor, is usually set to fall within the range of the field of view of the camera.

However, it is not possible to confirm which part of the image the warning area of the heat ray sensor is actually set by simply observing the image on the monitor. It is difficult to confirm whether or not the guard area is set at a desired position, especially when the adjustment of the viewing angle is performed separately and independently by the camera and the heat ray sensor. It is difficult to confirm the warning area of the heat ray sensor.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and is directed to a surveillance camera including a hot-wire sensor and a camera, wherein a viewing angle is adjusted by the camera and the hot-wire sensor separately and independently. It is another object of the present invention to provide a surveillance camera capable of clearly and easily confirming a position within a field of view of a camera where a guard area of a heat ray sensor is located.

[0006]

To achieve the above object, a surveillance camera according to the present invention comprises a television camera, a heat ray sensor, first angle adjustment means for adjusting the angle of the television camera, and a heat ray sensor. A second angle adjusting means for adjusting the angle of the light beam, and a marker indicating a caution area of the condensing optical system of the heat ray sensor.
Pattern data and data on its display position
The marker memory comprising, calculated relative view angle of the television camera and the heat ray sensor based on the angle information from the first angle adjusting means and the second angle adjusting means, based on the relative viewing angle thereof obtained, displayed to Pattern data and display position data
Data from the marker memory to determine the field of view of the hot-wire sensor.
This pattern signal is used as a marker signal
And a control unit that superimposes the image signal on the video signal .

[0007]

The viewing angle of the television camera can be adjusted independently by the first angle adjusting means, and the viewing angle of the heat ray sensor can be adjusted independently by the second angle adjusting means. In addition, pattern data of a marker indicating a warning area of the condenser optical system of the heat ray sensor,
And a marker memory having data on the display position.

Then, the control section determines a relative viewing angle between the television camera and the heat ray sensor based on the angle information from the first angle adjusting section and the second angle adjusting section, and based on the determined relative viewing angle. Then, the pattern data to be displayed and the data of the display position are read out from the marker memory and used as a marker signal indicating the visual field of the heat ray sensor, and this pattern signal is superimposed on the video signal from the television camera.

Therefore, by observing the screen on the monitor, it is possible to confirm what position the caution area of the heat ray sensor is set.

[0010] As described above, according to the surveillance camera of the present invention, the caution area of the heat ray sensor can be visually recognized on the monitor screen, so that the visual field of the heat ray sensor can be clearly and easily confirmed. Can be.

[0011]

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an embodiment of a surveillance camera according to the present invention, wherein 1 is a surveillance camera, 2 is an angle adjustment unit,
Is an imaging unit, 4 is a video signal processing unit, 5 is an addition circuit, 6 is a switch, 7 is a pyroelectric element, 8 is a condensing optical system, 9 is a signal processing unit, 10 is a control unit, 11 is a setting unit, 12 Denotes a marker memory, 13 denotes a case, and 14 denotes an angle adjustment unit.

First, the configuration and operation of each unit shown in FIG. 1 will be outlined. The angle adjustment unit 2 includes a well-known angle adjustment mechanism, and can adjust the viewing angle of the imaging unit 3 in two axial directions orthogonal to each other, for example, a horizontal direction and a vertical direction. Further, the angle adjusting unit 2 includes an angle measuring unit such as a rotary encoder.

The angle adjustment unit 14 is also similar to the angle adjustment unit 2,
A well-known angle adjusting mechanism used for adjusting the angle of the condensing optical system in the heat ray sensor is provided, and the viewing angle of the condensing optical system 8 is adjusted in two axial directions orthogonal to each other, for example, a horizontal direction and a vertical direction. Has been made possible. The angle adjusting unit 14 includes an angle measuring unit such as a rotary encoder. Note that it is desirable to limit the adjustment range of the angle adjustment unit 14 so that the alert area formed by the condensing optical system 8 is always within the field of view of the imaging unit 3. It is apparent to those skilled in the art that the limitation of the angle adjustment range can be performed by well-known means.

The image pickup section 3 comprises a solid-state image pickup device such as a CCD, and operates constantly after power is turned on. The video signal output from the imaging unit 3 is subjected to predetermined processing such as amplification and addition of a synchronization signal in a video signal processing unit 4, and is input to one input terminal of an addition circuit 5.

The addition circuit 5 adds the video signal from the video signal processing unit 4 and the marker signal from the control unit 10. When no marker signal is supplied, the addition circuit 5 receives the video signal from the video signal processing unit 4. Outputs the video signal as it is. The adding circuit 5 may simply add the video signal from the video signal processing unit 4 and the marker signal from the control unit 10, or may use a non-additive mix (Non Additive Mixin).
g).

The switch 6 is always open, and the control unit 1
It closes only when instructed from 0.

The condensing optical system 8 is composed of a well-known optical element such as a reflecting mirror or a Fresnel lens, and a pyroelectric element 7 is arranged near the focal point. The field of view of the condensing optical system 8 is narrower than the field of view of the imaging unit 3.

The output signal of the pyroelectric element 7 is input to a signal processing section 9 and subjected to predetermined processing such as amplification and comparison with a threshold value. Then, when the signal processing unit 9 detects a moving body that emits heat rays, the signal processing unit 9 outputs a predetermined alarm signal to the control unit 10. In addition,
Since the signal processing performed by the signal processing unit 9 is well known, its details are omitted.

The control unit 10 manages the operation of the surveillance camera 1 in an integrated manner, and comprises a microprocessor and its peripheral circuits.

The setting section 11 is composed of a dip switch or other appropriate switches, and is composed of at least a setting of whether or not to display a marker, a pyroelectric element 7, a condensing optical system 8, and the like. The warning distance of the heat ray sensor means can be set.

The marker memory 12 stores the pattern data of the marker indicating the security area of the condensing optical system 8 and the data relating to the display position. The specifics are as follows. It is.

For example, it is now assumed that the condensing optical system 8 is configured to perform spot warning, and the relative viewing angle between the image pickup unit 3 and the condensing optical system 8 is adjusted as shown in FIG. If the guard distance is determined, the shape and size of the guard area 15 at the guard distance and the position of the guard area 15 in the field of view 16 of the imaging unit 3 are uniquely determined.

That is, if the relative viewing angle between the image pickup unit 3 and the condensing optical system 8 and the guard distance of the heat ray sensor means are determined, the shape and size of the guard area and the position of the guard area in the field of view of the image pickup unit 3 are determined. Since it is uniquely determined, the shape and size of the guard area and the position in the field of view of the imaging unit 3 for each guard distance are theoretically or experimentally determined for each relative viewing angle, and the information is stored in a marker memory. It is sufficient to write it in 12.

Therefore, the marker memory 12 includes, for example, various pattern data indicating the shape and size of the guard area, and selects any one of the patterns in the image taken by the image pickup unit 3 based on the relative viewing angle and the guard distance. What is necessary is just to have the data structure which can extract the information which shows what position should be displayed.

Although the case of performing spot security has been described above, the same applies to the case where the condensing optical system 8 is configured to perform three-dimensional security and the case where it is configured to perform surface security. In the above description, the shape and size of the guard area and the position in the field of view of the imaging unit 3 are obtained for each guard distance for each relative viewing angle.
A predetermined warning distance range may be obtained for each predetermined range of relative viewing angles.

The outline of each part of the surveillance camera 1 has been described above.
Is housed inside.

Next, the operation of the control unit 10 will be described. First, when the marker display is not set by the setting unit 11, the control unit 10 receives the alarm signal from the signal processing unit 9, and receives the alarm signal from the receiver (such as a monitoring center). (Not shown), an alarm signal indicating that an intruder is present is output, and the switch 6 is closed. As a result, the video signal of the image captured by the imaging unit 3 when the signal processing unit 9 outputs the alarm signal is transmitted to a predetermined signal from a monitoring center or the like via the video signal processing unit 4, the addition circuit 5, and the switch 6. It is supplied to a monitor provided at the location.

When the display of the marker is set by the setting unit 11 and the warning distance is set, the control unit 10 closes the switch 6 and sets the angle measuring means of the angle adjustment unit 2 and the angle of the angle adjustment unit 14. The horizontal and vertical angles are fetched from the measuring means, the horizontal and vertical relative viewing angles between the imaging unit 3 and the condensing optical system 8 are determined, and the pattern to be displayed is obtained from the relative viewing angle and the caution distance. The data and the data at the display position are read from the marker memory 12, and the read pattern data is read at the timing determined by the data at the display position with reference to the synchronization signal and the video clock VCL fetched from the video signal processing unit 4. It is sent to the addition circuit 5. This is the marker signal.

Therefore, when the display of the marker is set by the setting unit 11, the marker indicating the alert area is displayed on the monitor together with the image picked up by the image pickup unit 3. An example is shown in FIG.

FIG. 3A shows a case where the condensing optical system 8 is configured to perform three-dimensional security, and a plurality of security areas 17 are provided.
Is superimposed and displayed on an image (not shown) captured by the imaging unit 3. FIG. 3B shows a case in which the condensing optical system 8 is configured to perform spot security, and a spot-like security area 18 is displayed so as to be superimposed on an image (not shown) captured by the imaging unit 3. Is done. Similarly, when the condensing optical system 8 is configured to perform surface guard, a linear guard area 19 is added to an image (not shown) captured by the imaging unit 3 as shown in FIG. 3C. It is displayed superimposed.

When the display of the marker is canceled by the setting unit 11, the control unit 10 ends the generation of the marker signal.

As described above, when the display of the marker and the guard distance are set by the setting unit 11, the image taken by the image pickup unit 3 and the marker of the guard area formed by the condensing optical system 8 are displayed on the monitor screen. Therefore, by observing the screen of the monitor, it is possible to easily confirm whether or not the guard area is formed at a desired place, which is very effective when the surveillance camera 1 is installed.

In setting the caution distance, the imaging unit 3
When the distance between the marker and the condensing optical system 8 is short, the gap between the marker and the actual guard area due to the guard distance is small, so that the setting of the guard distance is not necessarily required.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, when performing three-dimensional security, instead of displaying each security area as indicated by 17 in FIG. 3A, the range of the security area may be displayed as indicated by a broken line 20.

In the above embodiment, the switch 6 is provided.
When this switch 6 is fired, it is closed.
The video signal may be sent to the monitor at all times.

Further, the imaging section is not operated at all times, but is operated only when the hot-wire sensor issues an alarm, so that power consumption is suppressed, and it can be confirmed that an alarm is issued when a video signal is output. It may be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship between a visual field of an imaging unit and a guard area by a condensing optical system.

FIG. 3 is a diagram showing an example of marker display.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Surveillance camera, 2 ... Angle adjustment part, 3 ... Image pickup part, 4 ... Video signal processing part, 5 ... Addition circuit, 6 ... Switch, 7 ... Pyroelectric element, 8 ... Condensing optical system, 9 ... Signal processing part Reference numeral 10: control unit, 11: setting unit, 12: marker memory, 13: case, 14: angle adjustment unit.

Continuation of the front page (56) References JP-A-5-40894 (JP, A) JP-A-58-161097 (JP, A) Japanese Utility Model Sho 63-92486 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) G08B 13/00-15/02

Claims (1)

(57) [Claims] 1. A television camera, a heat ray sensor, first angle adjustment means for adjusting the angle of the television camera, second angle adjustment means for adjusting the angle of the heat ray sensor, and a condensing optical system of the heat ray sensor. Of the marker indicating the security area
It has turn data and data on its display position.
The relative viewing angle between the television camera and the heat ray sensor is determined based on the marker memory and the angle information from the first angle adjusting unit and the second angle adjusting unit, and the relative viewing angle is to be displayed based on the determined relative viewing angle. Pa
Turn data and display position data are read from the marker memory.
The marker signal indicating the field of view of the hot-wire sensor.
Superimpose pattern signal on video signal from TV camera
A surveillance camera, comprising: a control unit .