KR0130000B1 - Self checking method for tv camera - Google Patents

Abstract

Disclosed is a self diagnostic method for a broadcasting camera which includes a MICOM that a standard signal is embedded, a pulse board that generates all kinds of pulses, an encoder board that all kinds of signals are embedded, a supply voltage board that supplies a necessary supply voltage to each board. The self diagnostic method includes a discriminating step which discriminates whether all the signals are input from the necessary board, calculation step which finds the signal of a board having a difference when comparing with the standard signals and calculates a compensation volume when signals are all input at the signal input step, an input state search step which finds a signal of the board which is not input if there is an input signal at the signal input step, and a display step which displays the results of the compensation volume calculation step and the input state search step. Thus, the abnormality of the camera can be easily checked.

Description

Self-diagnosis method of broadcasting camera

1 is a block diagram of a conventional diagnostic apparatus for a broadcast camera.

2 is a flowchart showing a self-diagnosis method of a broadcasting camera according to the present invention.

3 is a block diagram for performing a self-diagnosis method of a broadcasting camera according to FIG.

* Explanation of symbols for main parts of the drawings

10 camera 11 oscilloscope

12: waveform monitor 13: vector scope

14: color monitor 15: picture monitor

110: pulse board 120: encoder board

130: power board 140: micom

150: EVF

The present invention relates to a self-diagnosis method of a broadcast camera, and more particularly, to a self-diagnosis method capable of displaying an abnormal part by comparing a signal introduced into a camera with a reference signal embedded in a microcomputer.

In general, broadcast cameras have predefined standard signals. These signals are supposed to be adjusted at the time of manufacture and sometimes need to be adjusted while in use.

Since the electronic view finder (hereinafter referred to as an EVF) of the broadcasting camera applies an image output signal to view an image, it is possible to see the image currently being taken by the camera and check the operation state of the camera.

Therefore, conventionally, as shown in FIG. 1, other auxiliary equipment is required to diagnose the state of the camera 10 or check pulses required by the camera.

Various monitors (14, 15) and vector (13), except for the oscilloscope (11), are used to capture an image of a projectile under the condition of illuminating the camera for the state and signal check of the camera (10). Connect to and analyze its output status.

The oscilloscope 11 connects the scope's probe to the test point of the internal board of the camera 10 and analyzes whether the desired signal is coming out at the specified level and timing for each pin and terminal, Turn the potentiometer to make the desired signal.

Meanwhile, the waveform monitor 12 displays an image signal including horizontal and vertical synchronization signals, and the vector scope 13 displays the magnitude and phase of the chroma signal.

The color monitor 14 checks the state of the color of the video signal output from the camera 10.

The picture monitor 15 analyzes image quality at a higher resolution than the color monitor 14.

The above-mentioned diagnostic device of the broadcast camera has a problem that it is possible to determine whether the test and failure by having a variety of auxiliary devices, and there is a problem that the self-diagnostic test is impossible when using the camera from outside without the auxiliary equipment.

In addition, when making precise adjustments or during after-sales service, there was an inconvenience of bringing a camera to a laboratory equipped with test equipment and checking it in a place where test equipment was not provided.

In order to overcome the above problems, an object of the present invention is to provide a self-diagnostic method of the camera to display the abnormal signal by comparing and determining the standard signal and the current signal introduced by using a microcomputer.

In order to achieve the above object, the present invention provides a microcomputer with a built-in standard signal, a pulse board for generating various pulse signals, an encoder board with various signal types, a power board for supplying the necessary power of each board, etc. In the broadcast camera, a signal input step of determining whether all signals are input from each board, and a correction amount for calculating a correction amount by finding a signal of a board that differs from a standard signal when all signals are input in the signal input step. A calculation step, an input state search step of finding a signal of a board not input if there is a signal that is not input in the signal input step, and a display step of displaying results from the correction amount calculation step and the input state search step; It is characterized by including.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the self-diagnosis method of the broadcast camera according to the present invention.

2 is a flowchart showing a self-diagnosis method of a broadcasting camera according to the present invention.

According to FIG. 2, step S1 corresponds to a signal input step, steps S2 to S10 correspond to a correction amount calculation step, steps S11 to S15 correspond to an input state search step, and steps S16 to S17 correspond to a display step. .

Next, the flowchart of FIG. 2 will be described with the block diagram of the self-diagnostic apparatus of the broadcasting camera of FIG.

Referring to FIG. 2, in the microcomputer 100 in which the standard signal is embedded, it is determined whether the signals are input from the fill board 110, the encoder board 120, and the power board 130 (S1).

Here, according to the design of the microcomputer 100, more associations with the board of the camera are possible.

When the signals are input from each of the boards 110, 120, and 130, the difference is detected by comparing with the standard signal embedded in the microcomputer 100 (steps S2 and S3). Shear whether the difference signal is generated in the pulse board 110 to search for the difference signal. At this time, the pulse board 110 serves to make all the signals necessary for the camera and send them to the required board.

The signals output from the pulse board 110 have a predetermined voltage level and timing.

For example, in the microcomputer 100, the signal output from the pulse board 110, that is, in the case of a horizontal driving pulse 5Vp-p voltage level is built in the timing of 6.36msec as a standard, the manual drive when the horizontal clamp signal 4.8msec away from the pulse and 8Vp-p at a level of 1.3msec width is embedded, the synchronization signal has a width of 4.7msec and the slope is within 0.14msec built-in and the standard signals and pulse board ( Compare with the signal output from 110) (S4 ~ S6 step)

It is determined whether a signal having a difference compared to the standard signal has occurred in the encoder board 120, and finds an abnormal pulse in the encoder board 120. That is, the composite video signal output from the encoder board 120, the luminance signal (Y), the color signal (C), the color difference signal (RY BY) and the composite video signal built in the microcomputer 100, luminance signal (Y), Compared with the standard signals for the color signal C and the color difference signals RY and BY. (Steps S7 to S8)

If the board on which the difference signal is loaded is not the pulse board 110 and the encoder board 120, the abnormal pulse is searched in the power board 130. At this time, the auto-comparing voltage built into the microcomputer 180 and various driving powers according to each board are compared with the power output from the power board 130 (step S9).

When the abnormal signal is searched in the boards 110, 120, and 130, a correction amount is calculated (step S10).

If there are signals that are not input in the signal input step (step S1), the pulse board 110 is diagnosed to find a signal that is not output in the pulse board 110 (steps S11 and S12).

If the pulse board is not abnormal, the encoder board 120 is searched to find a signal that is not output in the encoder board 120 (steps S13 and S14).

If there is no abnormality in the encoder board 120, a voltage signal that is not output in the power board 130 is found.

On the other hand, it is determined whether to display the result in step S10 is displayed on the EVF screen 40, and in step S12, S14, S15 to search for signals that are not output from each board (110, 120, 130) The result is displayed on the EVF screen 140. (Step S16, S17)

As described above, the self-diagnosis method according to the present invention compares the reference signal built in the microcomputer with the current signal flowing in the broadcasting camera, and immediately finds a signal that does not come out when the required signal does not come out. Take immediate action by letting you know the fault condition immediately.

In addition, the present invention can determine the state of the camera from time to time by giving a command to the microcomputer even when shooting outdoors to display the current state of the camera on the electronic finder.

Claims (1)

A broadcasting camera comprising a microcomputer with a built-in standard signal, a pulse board for generating various pulse signals, an encoder board with various signal types, a power board for supplying the power required for each board, and the like. Determining whether all the signals have been input, calculating a correction amount by finding a signal of a board that differs from a standard signal when all signals are input in the signal input step, and a signal not input in the signal input step And an input state search step for finding a signal of a board not input, and a display step for displaying the results from the correction amount calculation step and the input state search step.