JP2778320B2 - Remote control surveillance TV camera system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[00001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control surveillance television camera system, and more particularly to a surveillance television camera system using a super telephoto motorized zoom lens.

[0002]

2. Description of the Related Art The configuration of a conventional remote control monitoring television camera system is shown in FIG. The television camera 1 is mounted on an electric rotating head 5, rotated in a horizontal direction (pan direction) and a vertical direction (tilt direction) by a control device 7, and a zoom amount is changed from a telephoto to a wide angle by an electric zoom lens 6. You. The television camera 1 is connected to the television monitor 2, the camera platform 5 and the zoom lens 6 are connected to the control device 7, and the control device 7 is connected to the remote control device 3.

In this television camera system, a television camera 1 captures a subject image through an electric zoom lens 6 and sends it to a television monitor 2 as a video signal. The television monitor 2 receives the video signal and projects the subject on the monitor screen. Further, the remote control device 3 includes an electric zoom lens 6
Zoom amount, focus amount, pan amount of the electric swivel pan head 5,
It has a tilt amount control switch. By operating this switch, each control voltage (or relay control signal etc.)
Is sent to the control device 7. The control device 7 receives this, and the pan amount control voltage generation circuit 7-1 and the tilt amount control voltage generation circuit 7
-2, the control voltage generated by the zoom amount control voltage generation circuit 7-3 and the focus amount control voltage generation circuit 7-4 is sent to the electric zoom lens 6 and the electric rotating head 5.

[0004] The electric zoom lens 6 receives the control voltage, and the size (angle of view) of the subject imaged by the television camera 1.
Can be freely changed from the telephoto to the wide-angle while the focal point is in focus, by the voltages of the zoom amount control voltage and the focus amount control voltage, the polarity, and the length of the ON time. The motor-driven swivel head 5 has a pan amount control voltage and a tilt amount control voltage,
The tilt amount and the pan amount can be freely set according to the polarity and the length of the ON time. Therefore, for example, in a remote control room or the like remote from the television camera, the controller or the like uses the remote control device while watching the television monitor, and according to the position, size, distance, and the like of the subject to be imaged.
, And the zoom amount and focus amount of the lens can be freely operated.

[0005]

In this conventional remote control surveillance television camera system, there is no particular restriction on the zoom amount control of the electric zoom lens 6 and the pan amount and tilt amount control of the electric revolving head 5. However, the following problems have occurred. For example, when this system is used for monitoring highways, traffic controllers, etc. not only monitor road conditions (traffic volume, traffic flow, construction status, broken cars, accident cars, etc.) but also use lenses. By adjusting to the super telephoto side and moving the direction of the TV camera up, down, left and right, it is possible to look out of places other than roads, for example, windows of ordinary houses and apartments, etc., causing problems such as privacy infringement I do. It is an object of the present invention to provide a system that restricts illegal use of a television camera system such as invasion of privacy.

[0006]

SUMMARY OF THE INVENTION A television camera system according to the present invention comprises a television camera as a control means for remotely controlling an electric zoom lens of a television camera and an electric swivel pan head for changing an imaging direction of the television camera. A function is provided to limit the control of at least one of the zoom amount and the focus amount of the electric zoom lens according to the imaging direction of the camera. That is, when the imaging direction of the television camera is other than the direction set in advance, the telephoto side of the zoom amount is limited, or control is performed so that the focus is not adjusted.

[0007]

When the image pickup direction of the television camera is other than the preset direction, the telephoto shooting is disabled or the focus is not adjusted to restrict illegal use such as privacy infringement.

[0008]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a system diagram of a remote control surveillance television camera system according to one embodiment of the present invention, wherein 1 is a television camera, 2 is a television monitor, 3 is a remote control device, 5 is an electric rotating head, 6
Denotes an electric zoom lens, which is the same as the conventional one. Reference numeral 4 denotes a control device for the electric rotating head 5 and the electric zoom lens 6, and a pan amount control voltage generating circuit 4-1;
A tilt amount control voltage generation circuit 4-2, a zoom amount control voltage generation circuit 4-3, and a focus amount control voltage generation circuit 4-4 are provided, and a pan amount and tilt amount detection circuit 4-5 is provided.
And a pan amount and tilt amount storage circuit 4-6 and a comparison limiting circuit 4-7.

In this camera system, the remote control device 3
The pan amount and the tilt amount of the television camera controlled by the detection circuit 4-6 are detected by a detection circuit 4-6.
-6, and when the detected value deviates from the stored value range, the zoom amount voltage generation circuit 4
-3 and the focus amount control voltage generation circuit 4-4 to control the operation of the electric zoom lens 6. For example, FIG.
Is a view showing one example thereof, and shows an angle of view of a subject. In the figure, X indicates the horizontal axis, and Y indicates the vertical axis, and indicates the entire area that can be imaged when the lens is moved to the widest angle and the camera platform is moved up, down, left, and right. In advance, up, down, left, right (X = horizontal, Y
= Vertical), and the coordinates of the areas b, c, and d for which the zoom amount is to be restricted are stored in the storage circuit 4-5, so that the pan amount of the motor-driven swivel head 5 (left and right, X = horizontal) It is possible to limit the zoom amount of the super-telephoto electric zoom lens 6 in accordance with the coordinates corresponding to the tilt amount (up / down, Y = vertical).

That is, the pan amount control voltage generation circuit 4-1 and the tilt amount control voltage generation circuit 4-2 are detected by the detection circuit 4-6.
By detecting the pan amount and the tilt amount of the electric swivel 5 from the data, the comparison limit circuit 4-7 compares the detection result with the zoom amount restriction area coordinates stored in the storage circuit 4-5 in advance, thereby obtaining Only for the coordinate area a on the road where telephoto imaging is desired, the zoom amount of the super-telephoto motorized zoom lens 6 is not limited and can be freely controlled to the super-telephoto side. With respect to the coordinate areas b, c, and d other than the road, the zoom amount is limited, and the zoom amount control voltage generation circuit 4-3 is controlled to a maximum angle on the wide-angle side or an angle of view that does not violate privacy.
It should not be set on the super telephoto side. At this time, by limiting the focus amount control voltage generation circuit 4-4, it is possible to blur the focus when the coordinate areas b, c, and d are imaged and zoomed to the telephoto side.

When the television camera is installed, the zoom amount and the focus amount of the electric zoom lens can be fixedly set according to the pan amount and the tilt amount.
In this case, the storage circuit, the detection circuit, the comparison limiting circuit, and the like of the control device 4 are replaced with a ROM in which required control data is stored in advance.
It is also possible to configure with.

[0012]

As described above, the present invention provides the remote control means for controlling the electric zoom lens and the electric rotating head of the television camera by using the amount of zoom of the electric zoom lens according to the imaging direction of the television camera. Since a function is provided to limit the control of at least one of the focus amount and the focus amount, when imaging in a direction other than a preset imaging direction, telephoto imaging is limited, and control is performed so that focus is not achieved.
There is an effect that privacy infringement, which has conventionally been caused by performing imaging with super telephoto, can be prevented.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an overall configuration of a television camera system of the present invention.

FIG. 2 is a diagram schematically illustrating an angle of view of a subject captured by a television camera.

FIG. 3 is a system diagram of a conventional television camera system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Television camera 2 Television monitor 3 Remote control device 4 Control device 4-5 Storage circuit 4-6 Detection circuit 4-7 Comparison limiting circuit 5 Electric rotating pan head 6 Electric zoom lens

Claims (1)

(57) [Claims] 1. A remote control monitor comprising: a television camera having an electric zoom lens; an electric rotating head for changing an imaging direction of the television camera; and means for remotely controlling the electric zoom lens and the electric rotating head. In the television camera system, the control unit includes the television camera
When the image capturing direction is other than the preset direction,
Limit the telephoto side of the zoom amount of the Levi camera, or
A remote control surveillance television camera system, which has a function of performing control so as to be out of focus .