JPH096437A - Preset control device - Google Patents

Abstract

(57) [Summary] [Purpose] In a preset control device such as a surveillance TV camera device, when performing preset operation after setting the preset position, one bit worth is irrespective of whether the current position is on the left side or the right side of the target position. By eliminating the error, the stop position is made the same, and the stop position reproducibility is improved. [Structure] The CPU 1 uses the preset position data stored in the preset position memory 2 in advance and the horizontal turning A.
The position data of the / D converter 4 are compared to detect whether the current position is on the left side or the right side of the preset position. If the data do not match, move in the direction in which the data match. When it is set to stop on the left side, when it is on the left side, it stops at the position of the preset position data, and when it is on the right side, it passes through 1 bit of the preset position data and stops at the next data position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a television camera device for surveillance, an electric pan head, an electric zoom lens, etc., and sets a plurality of surveillance points in advance. The present invention relates to a preset control device which is selected by one touch.

[0002]

2. Description of the Related Art In a conventional apparatus, the image pickup position by a television camera device is stored as preset position data for each monitoring point for each of pan, tilt, and zoom of an electric zoom lens, and focus of an electric zoom lens. The robot moves while comparing the preset position data and the current position data, and ends the movement when the preset position data and the current position data match. As an example, a pan of an electric pan head will be described. FIG. 2 is a diagram showing the relationship between preset position data for explaining the stop position and the stop position. The preset position d may approach from the left side or the right side. In both cases, the preset position d is stopped at the preset position data a, but the preset position d based on the preset position data a is constant depending on the resolution and the operating range of the A / D converter. At a position b which has a width of, and approaches from the left and stops, and a position c, which approaches from the right and stops, the stop position differs by one bit. The same applies to tilting, zooming of an electric zoom lens, and focusing.

[0003]

In the above-mentioned prior art, when the preset position is approached during preset operation, for example, the pan of an electric pan head is described, there are cases where it approaches from the right side and cases where it approaches from the left side. When approaching from the left with the preset position data of the position sandwiched, it stops on the left side, and when approaching from the right, it stops on the right side. At this time, for example, in the case of a pan of an electric pan head, the movable range is equally divided by 2 to the nth power by resolution n bits, and position data is assigned to each position. That is, each position data has an angle φ obtained by equally dividing the movable range by n bits to the nth power of 2. Therefore, there is a drawback that the angle φ is deviated between the stop positions when approaching from the left and when approaching from the right. In the case of the pan of the electric pan head, the position shift of the monitored spot on the television monitor due to the angle φ becomes larger as the monitored spot moves away from the electric pan. An object of the present invention is to eliminate the shift of the stop position when the preset position is approached from one side and when approached from the opposite side.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a preset control apparatus in which a stop position having a width of one resolution indicated by preset position data at the time of preset operation is moved in the forward direction and reversely moved. In the case of either movement from the direction, one resolution is added and the operation is stopped.

[0005]

As a result, the preset operation can be stopped at the same position when the preset position is approached from the left and when it is approached from the right.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 is a CPU for comparing position data, 2 is a preset position memory for storing preset position data by preset position setting by the operation panel 15, and 3 is a preset electric pan head having a potentiometer for position detection. 4 is a horizontal turning A / D converter,
Converts analog voltage from potentiometer into digital signal. Reference numeral 5 denotes an electric pan head control unit, which controls the horizontal and vertical turning motions of the electric pan head in accordance with instructions from the CPU 1. 6 is a ROM, 7 is a RAM, 8 is a camera unit, 9 is an electric zoom lens, 10 is a camera control unit, and 11 is a lens control unit. 12 is a zoom A / D converter for converting the analog voltage from the potentiometer into a digital signal, 13
Is a focus A / D converter that converts the analog voltage from the potentiometer into a digital signal, 14 is a vertical turning A / D converter that converts the analog voltage from the potentiometer into a digital signal, and 15 is an operation panel, such as a camera number or You can manually select the position number, move the pan head horizontally and vertically, adjust the zoom and focus of the electric zoom lens, control the TV camera power supply, lighting device, and other ancillary devices. Input the signal.

This operation will be described below by taking one system of a television camera as an example. The potentiometer slider is connected to the horizontal turning potentiometer signal input terminal 18 of the preset electric pan head 3 so that a voltage change can be obtained when the drive motor of the preset electric pan head 3 rotates. The horizontal turning (panning) A / D converter 4 A / D-converts the voltage applied from the potentiometer, and the CPU 1 reads it. Similarly, the vertical turning potentiometer signal input terminal 19 of the preset electric pan head 3 and the electric zoom lens 9
The potentiometer sliders of the respective potentiometers are connected to the zoom potentiometer signal input terminal 16 and the focusing potentiometer signal input terminal 17 of the electric zoom lens 9, and a voltage change is obtained when each drive motor rotates. The vertical turning (tilt) A / D converter 14, the zoom A / D converter 12, and the focus A / D converter 13
The voltage applied from each potentiometer is A / D converted, and the CPU 1 reads it.

In this case, in the preset operation mode,
From a plurality of preset position data stored in the RAM 7, it is compared with the data read by the preset position address signal to detect and determine whether the current position is the left side or the right side of the preset position d. If the data do not match, the control signal (hereinafter referred to as the preset control signal) that turns on the motor power is controlled so that the drive motors for the preset electric pan head and the electric zoom lens rotate in the directions in which the data match. According to the control, it is converted into a DC output, an AC output, a relay contact output, etc., and is output from the camera control unit 10, the lens control unit 11, the electric camera platform control unit 5, and the control output terminal 20.

It is determined in advance whether to stop on the left side or the right side of the preset position d. For example, when it is decided to stop on the left side, if the current position is on the left side, it will stop at the position of the preset position data and the stop position will be b.
Becomes When the current position is on the right side, the preset position data a is passed by 1 bit and stopped at the next data position a ′. When it is decided to stop on the right side, if the current position is on the right side, it is stopped at the position of the preset position data and the stop position is c. When the current position is on the left side, the preset position data a is passed by 1 bit and stopped at the next data position a ″.

[0010]

As described above, the stop position after the preset operation is not displaced, and the preset stop reproducibility is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between preset position data and a stop position according to an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between preset position data and a stop position showing a conventional example.

FIG. 3 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 CPU 2 Preset position memory 3 Preset electric pan head 4 Pan A / D converter 5 Electric pan head control section 6 ROM 7 RAM 8 Camera section 9 Electric zoom lens 10 Camera control section 11 Lens control section 12 Zoom A / D converter 13 focus A / D converter 14 tilt A / D converter 15 operation panel 16 potentiometer signal input terminal 17 potentiometer signal input terminal 18 potentiometer signal input terminal 19 potentiometer signal input terminal 20 control output terminal

Claims (1)

[Claims] 1. In a position control device used for a television camera device, a signal from a position detection potentiometer is set to A /
Means for D-converting and storing information on a plurality of stop positions in the television camera device is compared with signal values of the potentiometer and information on a stop position selected from the plurality of stop position information, and the position control is performed. A preset control means for generating a preset control signal for turning on and off the operation of the driving device of the apparatus, and from a forward direction and a reverse direction with respect to a stop position having a width of one resolution indicated by the stop position information. A preset control device characterized by improving the stop position accuracy by adding one resolution in one of the forward direction and the backward direction by movement.