JPH0662285A - Universal head controller - Google Patents

Abstract

(57) [Summary] [Purpose] Automatically controls the appropriate pan or tilt speed according to the zooming position of the lens. [Structure] The zoom position of 1 is recognized by 6 of 2 and the PWM duty ratio suitable for the zoom position which is set and stored in advance at 6 is output. The PWM signal is converted to an analog voltage at 8 and 9, and then 10, 1
1 controls the speeds of 12 and 13. [Effect] (1) The user does not need to set the speed of auto pan or the like while looking at the screen. (2) When photographing between the storage positions of the platform control device, for example, when the wide-angle screen is switched to the telephoto screen, the pan or tilt speed is automatically slowed down, which makes it easy for a monitor to monitor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platform controller for controlling an electric platform mounted with a surveillance camera.

[0002]

2. Description of the Related Art In the conventional platform control device, no patent relating to this case can be found, but as a conventional example for automating the movement of the TV camera in the imaging direction to the next monitoring location, Japanese Patent Laid-Open No. 3-227191 (3. 10.8).

[0003]

The above-mentioned prior art is not set so as to automatically change the pan or tilt speed of the platform according to the information from the zoom lens.
Therefore, (1) when auto-panning the lens, the user needs to set the pan speed while looking at the screen.

(2) Microcomputer or EE of the platform control device
When capturing images between several set positions (pan angle, tilt angle, zoom position, iris state, etc. of the pan head) stored in the PROM, it is easy to monitor the pan or tilt speed on the wide-angle screen, for example. In the case of the speed (speed A), in the vicinity of the storage position where the zoom lens is set on the telephoto side, the screen moves quickly at the speed A, and it is difficult to monitor between the set positions.

There is a problem.

According to the present invention, the microcomputer recognizes the zoom position of the zoom lens based on the information from the zoom lens (the potential of the potentiometer built in the zoom lens indicates whether the zoom state is telephoto or wide-angle). When it is on the side, the duty ratio of the PWM signal is automatically reduced to slow down the pan or tilt speed of the platform, thereby making it easy to see the monitoring screen during movement.

[0007]

In order to achieve the above object, data (data 1) obtained by previously converting a potentiometer potential of a zoom lens into a digital signal and a PWM output duty for determining a pan or tilt speed corresponding to the data 1 are obtained. The ratio data (data 2) is set and stored in the EEPROM or the RAM of the microcomputer. Further, in the microcomputer, the zoom position is recognized by comparing the data obtained by A / D converting the potentiometer potential mounted on the zoom lens with the data 1, and the P of the data 2 corresponding to the preset zoom position is detected.
It is programmed to output the WM signal. As a result, the pan or tilt speed when the zoom position changes can be automatically set to a speed that is easy to monitor.

[0008]

The zoom position data (data 1) and the PWM duty ratio data (data 2) corresponding to the data 1 are previously set in the EEPROM or the RAM of the microcomputer,
By storing it, the actual zoom position can be recognized, and an appropriate pan or tilt speed can be automatically set at the zoom position.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

The zoom position of the zoom lens 1 is represented by the voltage of the potentiometer 4 and is input to the platform controller 2. In the platform controller 2, the voltage of the potentiometer 4 is converted into a digital signal by the A / D converter 5 and supplied to the microcomputer 6. In the microcomputer 6, the digital signal supplied from the A / D converter 5 and the EEPRO
The zoom state is recognized by comparing the data stored in M in advance. Upon recognition, the duty ratio data of the PWM output signal corresponding to the zoom state set and stored in advance is taken out from the EEPROM and the pan or tilt PWM signal is output at that duty ratio. Integrator circuits 8 and 9 integrate the PWM signal supplied from the microcomputer, convert it into an analog signal, and supply it to the pan and tilt motor drive circuits 10 and 11. The motor drive circuits 10 and 11 supply necessary currents to the pan and tilt motors 12 and 13 of the platform 3 to control the motor speed. As described above, when the zoom position changes, the pan and tilt speeds of the platform can be automatically changed so that the moving speed matches the zoom position.

[0011]

According to the present invention, the pan and tilt speeds can be automatically changed depending on the zoom position of the zoom lens. (1) When auto panning, the user needs to set the pan speed while looking at the screen. There is no.

(2) Microcomputer or EE of the platform control device
When shooting between the storage positions stored in the PROM, for example, when the wide-angle screen (the pan / tilt speed that matches the wide-angle screen of the pan head) changes to the telephoto screen, the pan or tilt speed is automatically reduced. You can monitor between locations.

There are advantages such as the following.

[Brief description of drawings]

FIG. 1 is a system block diagram of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Zoom lens, 2 ... Pan head control device, 3 ... Pan head, 4 ... Potentiometer, 5 ... A / D converter, 6 ... Microcomputer, 7 ... EEPROM, 8, 9 ... Integration circuit, 10 ... Pan motor drive circuit , 11 ... Tilt motor drive circuit, 12 ... Pan motor, 13 ... Tilt motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Daisaku Nakadoi Inventor Daisaku Nakadoi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Hitachi Image Information Systems Co., Ltd. Stock Company Hitachi Image Information System

Claims (1)

[Claims] 1. Information (voltage) from a zoom lens is A / D.
An A / D converter for conversion, a microcomputer for recognizing a zoom state by inputting a signal from the A / D converter, an EEPROM having pan or tilt speed data (may be a RAM of the microcomputer), and an output signal from the microcomputer In a pan head controller that includes an integrator circuit that converts the DC voltage to a DC voltage and a motor drive circuit that pans or tilts the pan head with the DC voltage, the microcomputer automatically recognizes the zoom lens status and automatically detects the output signal. A pan head control device characterized by being set so as to change to.