JPH04103778U - Preset controller with circuit to prevent lighting errors - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to make it possible to remotely change the setting of the lighting range in a television camera monitoring system. [Configuration] Using the built-in potentiometer 1 in the electric pan head, comparators 2 and 3 and setting devices 4 and 5 are installed in the preset controller.
A lighting erroneous lighting prevention circuit is provided which turns off the lighting when the value of the potentiometer 1 becomes larger than the value of the setting device 4 or becomes smaller than the value of the setting device 5. Configure. When changing the operating range of this prevention circuit, the values of the setters 4 and 5 are remotely set to predetermined values.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a preset controller for remotely controlling the imaging direction of a television camera. It is something.

0002

[Conventional technology]

The lighting prevention circuit in conventional TV camera monitoring systems is A limit switch is installed inside the electric pan head on which the camera is placed, and the angle is above the set angle (monitoring range). If a TV camera is rotating outside), turn off this switch to turn off the lights. Ta.

0003 That is, FIG. 2 shows a conventional illumination prevention circuit built into an electric pan head. same In the figure, 7 is a right rotation limit switch, 8 is a left rotation limit switch, and 9 is a right rotation limit switch. Left rotation limit pin, 10 is right rotation limit pin, 11 is lever, 12 is rotation gear. Yes.

0004 Next, the illumination erroneous lighting prevention circuit according to the above configuration will be explained. First, the electric pan head When facing near the front, clockwise rotation limit switch 7 and left rotation limit switch Both switches 8 are not pressed, and the power of the illumination (not shown) is turned on.

[0005] Next, when the electric pan head rotates to the left, the counterclockwise rotating head attached to the rotating gear 12 The limit pin 9 also rotates, and the left rotation limit switch 8 is turned off by pushing the lever 11. do.

[0006] In addition, when the clockwise rotation occurs, the clockwise rotation limit pin 10 pushes the lever 11 and rotates clockwise. Turn off the rotation limit switch 7. Right rotation limit switch 7 and left rotation limit The switch 8 is an OR circuit, so when either switch is turned off, the lighting is turned off.

[0007]

[Problem that the idea aims to solve]

However, in conventional lighting prevention circuits, limit switches are turned on and off mechanically. Therefore, when changing the operating position (monitoring range), the limit pin inside the electric pan head must be changed. I had to change the location of the button.

[0008] The present invention eliminates these drawbacks and improves lighting in television camera surveillance systems. The purpose is to enable remote setting of the lighting range.

[0009]

[Means to solve the problem]

In order to achieve the above objectives, this invention is built into the electric pan head for preset control. Using a potentiometer, the preset controller includes a comparator and a setting device. A circuit to prevent false lighting is installed, and the value of the potentiometer is compared with the value of the setting device, and the lighting is switched on. It performs on/off operations.

0010

[Effect]

As a result, the settings can be changed remotely without opening the inside of the electric tripod head. be able to.

[0011]

【Example】

An embodiment of the present invention will be described below with reference to FIG. In the figure, 1 is an electric pan head has a built-in potentiometer, 2 and 3 are comparators, and 4 and 5 are the operation of the illumination erroneous lighting prevention circuit. The setting device 6 which determines the operating range is an AND circuit.

0012 Next, the illumination erroneous lighting prevention circuit according to the above configuration will be explained. Here, comparator 2 The value of potentiometer 1 built into the electric pan head is larger than the value of setting device 4. Sometimes it is inactive, and comparator 3 is set by the value of potentiometer 1 built into the electric pan head. When the value of the setter 4 becomes smaller than the value of the setter 5, it becomes inactive, and the value of the setter 4 becomes larger than the value of the setter 5. I will cherish it.

[0013] First, when the electric pan head is facing near the front, comparators 2 and 3 are both active. . Next, the electric pan head rotates counterclockwise, the value of built-in potentiometer 1 increases, and the If the value is greater than the value of the regulator 4, the comparator 2 becomes inactive.

[0014] Also, by rotating clockwise, the value of built-in potentiometer 1 becomes smaller, and the value of setting device 5 becomes smaller. If it becomes smaller, comparator 3 becomes inactive. The outputs of comparators 2 and 3 are determined by an AND circuit 6 when one of the comparators is inactive. At this time, it becomes inactive and the illumination (not shown) is turned off.

[0015] If you want to change the operating range (monitoring range) of this illumination prevention circuit, It is only necessary to change the set values of regulators 4 and 5 to the specified values, and these can be adjusted depending on the electrical circuit configuration. Therefore, the setting of this operating range can be changed remotely.

[0016]

[Effect of the idea]

As described above, according to the present invention, the lighting range can be set arbitrarily, and the setting can be changed Because it is done automatically, remote settings are easy and highly effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a lighting erroneous lighting prevention circuit according to the present invention.

FIG. 2 is a diagram illustrating a conventional illumination erroneous lighting prevention circuit and its operation.

[Explanation of symbols]

1 Potentiometer built into the electric pan head 2,3 Comparator 4,5 Setting device 6 AND circuit

Claims (1)

[Scope of utility model registration request] [Claim 1] A surveillance system in which lighting is attached to a television camera, and a preset controller controls an electric pan head, electric zoom lens, etc., and monitors any direction. A preset controller with a lighting erroneous lighting prevention circuit, characterized in that it is equipped with a lighting erroneous lighting prevention circuit that controls the on/off operation of the lighting based on the comparison result between the value of the potentiometer and the value of the setting device in the preset controller. .