JPS62117493A - Trouble diagnosing device for television camera device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a failure diagnosis device for a television camera device.

(Prior art and its problems) What is the fault diagnosis method for conventional TV cameras?

By pressing the corresponding switch for fault diagnosis on the operation panel of the camera controller, the test waveform for each unit in the camera is input to each unit, and at this time, the output obtained from each unit is diagnosed. This method determines whether there is a failure or not, and has the disadvantage that real-time processing is not possible because the test waveform is output during the video period, and that a test waveform is required for each unit.

(Objective) In order to solve these drawbacks, the present invention superimposes a test signal on each red, green, and blue color signal input section of the first stage unit of a television camera during the vertical zero blanking period, and
Using a microprocessor, the output signal of each unit is switched to the detection circuit, and whether or not a single superimposed test signal is output from each unit is used to determine whether there is a failure in each unit. This is a failure diagnosis device that can detect failures in each color signal processing section of each unit in real time using one test signal.

(Example) Nine embodiments of the present invention will be described below with reference to FIG.

], 2.3 in the figure are the video signal input terminals, and the red signal ■(
.

Green signal G and blue signal B are supplied. These video signals R, G, and B are subjected to signal processing in units 4 to 7, respectively, and then output to the subsequent stage. Here, the test signal for fault diagnosis generated by the test signal generating means 14 is applied to the input section of the first stage unit 40 by 1f during the vertical Ih blanking period. Therefore.

Multiplexers 8 to 1 installed at the output section of each unit 4 to 7 are controlled by a command signal from the microprocessor 12.
1 is sequentially switched, and each channel output signal of RlG and 11 of units 4 to 7 is taken out one by one and input to the detection circuit 13. Here, it is diagnosed which color signal of the unit the failure has occurred in depending on whether or not one superimposed test signal can be detected.

The microprocessor 12 performs the sub-processing in real time, thereby realizing real-time fault diagnosis.

FIG. 2 is a flowchart showing the processing procedure 4' of the microprocessor 12 in one embodiment of the present invention. Although the microprocessor 12 may perform processing other than the present invention, only the processing related to the present invention will be described here. In Figure 2, 11 says "Next color" and "Next unit"
If there are 9 colors, the first order is R, G, By: l11+, Y = U) If there are 9 colors, : L = N) 4. Unit 5゜Uniso I・
6. Unit 7 is the order. Additionally, the microprocessor 12 switches the multiplexer 8 corresponding to the unit 4 during the blanking period so that the 1)'l signal of the unit 4 is taken out.

Here, it is determined whether the test signal superimposed during the blanking jt11 can be detected by the detection circuit 13. If the test signal cannot be detected, the multiplexer 8 at this time selects the R of the currently selected unit 4. Generates a signal to notify that a failure has occurred in the signal processing section. The multiplexer 8 is then replaced to take out the G signal and a similar diagnosis is made for the G signal processing section. In Part 1~, when all the color signal processing parts in the unit 4 have been diagnosed at t7.

Diagnose the R signal processing part of the next stage unit 5 in the same way,
Hereinafter, the diagnosis will be made in the same manner as the previous stage unit 4.

When all the diagnoses regarding the color signal processing portions of the units 4 to 7 are completed, the process returns to the diagnosis of the red signal processing portion of the first stage unit 4 again. Thereafter, by repeating this process, real-time failure diagnosis is performed.

(Effects) According to the present invention, failures in each color signal processing section of each unit of a television camera can be individually detected in real time using a single test signal.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart showing the processing procedure of a microprocessor in the present invention. 4, 5.6.7 is the signal processing unit of the television camera. 8.9.10.11 is a multiplexer, 12 is a microprocessor, 13 is a detection circuit, and 14 is a test signal generating means. Agent: Patent Attorney Katsutoshi OgawaFigure 1Figure 2

Claims (1)

[Claims] In a television camera device composed of a plurality of video signal processing units, a test signal generating means for superimposing a test signal on the red, green, and blue signal input sections of the first-stage video processing unit during a vertical blanking period; a detection circuit that detects whether or not the superimposed test signal is output from each color signal output section of the video processing unit; and a detection circuit that switches and extracts each color signal output from the output section of each video processing unit and supplies it to the detection circuit. a multiplexer to
means for switching and controlling the multiplexer; determining means for determining in real time which color signal processing section of which video processing unit a failure has occurred based on the output of the detection circuit; and a signal indicating the location of the failure based on the determination result. the means by which it occurs;
A failure diagnosis device for a television camera device, comprising means for commanding and controlling each of these means.