JPH1032844A - Failure diagnosing method for television camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect an occurrence of an abnormal phenomenon and to quickly analyze a cause of a failure by using a means which accumulates the frequency of abnormality occurrence in failure diagnosing results for every failure diagnostic item and a means which stores and reads out the accumulated value. SOLUTION: A CPU 7 switches an input signal switching circuit 5 to a failure diagnosing signal 1 of a diagnostic item 1. The signal 1 is converted into a digital signal by an A/D converter 6 after passing the circuit 5 and then read by the CPU 7. The CPU 7 checks whether the A/D conversion value of the signal 1 is included in a prescribed range. If the conversion value is not included in the prescribed range, the occurrence of abnormality is diagnosed. Thus, the CPU 7 displays via a character generation circuit 10 on a monitor 11 in characters that the diagnostic result of the item 1 is abnormal. The CPU 7 also adds 1 to the value of an abnormality occurrence frequency accumulation value storage area of the item 1 which is stored in a RAM 8. The same procedure is carried out also for failure diagnostic items 2, 3 and 4 respectively. When a switch 12 is depressed with respect to the CPU 7, the accumulated value of abnormality occurrence frequency for items 1 to 4 are displayed in characters on the monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for diagnosing a failure in a television camera device.

[0002]

2. Description of the Related Art In a television camera device, a microcomputer (hereinafter abbreviated as CPU) detects a failure or abnormality of the device and performs a failure diagnosis for notifying a user of the result.

Conventionally, in failure diagnosis, a power supply voltage abnormality of a television camera apparatus, a function abnormality of each unit, a unit disconnection, an incorrect unit insertion, a system operation abnormality (camera cable disconnection, short circuit, data between a camera head and a camera control unit). Abnormalities such as communication abnormalities) are detected in real time.

In the video signal system, the camera head is provided with a test signal generation circuit and a circuit for switching between the video signal from the image sensor and the test signal. In the stage, failure diagnosis is performed by detecting whether the amplitude of the test signal is within a specified range.

Further, a plurality of test signal amplitude detection circuits are provided up to the final output stage of the video, and a failure point is specified by detecting the amplitude of the test signal at each detection position.

[0006] As a result of the failure diagnosis, an item which is abnormal is displayed to a user on a viewfinder or a monitor when an abnormality occurs to notify the user.

[0007]

In the above-mentioned prior art,
In the failure diagnosis of the television camera device, an item in which the failure diagnosis result is abnormal is displayed on a viewfinder or a monitor in text to notify the user of the device. In the case of an abnormal phenomenon having a low frequency of occurrence because it is performed only during a period of time, the user of the apparatus may overlook the character display, and there is a disadvantage that it takes a lot of time to analyze the cause of the failure.

The present invention eliminates these drawbacks, so that even if the user of the device overlooks the device due to an infrequently occurring abnormal phenomenon,
An object of the present invention is to be able to know later that an abnormal phenomenon has occurred and to quickly analyze the cause of a failure.

[0009]

According to the present invention, in order to achieve the above object, in a television camera apparatus, the number of times that a failure diagnosis result is diagnosed as abnormal for each failure diagnosis item of the failure diagnosis is accumulated, and the total number is calculated. The result can be stored and read.

As a result, even if the user of the apparatus overlooks an abnormal phenomenon with a low frequency of occurrence, it is possible to know later that the abnormal phenomenon has occurred, and to quickly analyze the cause of the failure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram of a fault diagnosis system according to the present invention, and FIG. 2 is a random access memory (hereinafter referred to as RA).
Abbreviated as M. 4) is a diagram of data arrangement in a memory. In FIG. 1, reference numerals 1 to 4 denote input units for failure judgment signals of diagnosis items obtained from respective failure judgment means of first to fourth diagnosis items (not shown).

First, the CPU 7 controls the input signal switching circuit 5
Is switched to the failure diagnosis signal 1 of the diagnosis item 1. The failure diagnosis signal 1 passes through the input signal switching circuit 5 and the AD converter 6
Is converted into a digital signal and read by the CPU 7. The CPU 7 checks whether the read A / D conversion value of the failure diagnosis signal 1 is within a specified range, and diagnoses an abnormality if it is not within the specified range. If it is diagnosed as abnormal, the CPU 7 informs the character generating circuit 1 that the diagnostic result of the diagnostic item 1 is abnormal.
Characters are displayed on the monitor 11 by 0. In addition, 1 is added to the value of the total number of times of occurrence of abnormality of the failure diagnosis item 1 in the RAM 8.
Is added.

Next, the CPU 7 controls the input signal switching circuit 5
Is switched to the failure diagnosis signal 2 of the diagnosis item 2. The failure diagnosis signal 2 passes through the input signal switching circuit 5 and the AD converter 6
Is converted into a digital signal and read by the CPU 7. The CPU 7 checks whether or not the read A / D conversion value of the failure diagnosis signal 2 is within a specified range. When the CPU 7 determines that the diagnosis result is abnormal, the CPU 7 notifies the character generation circuit 1 that the diagnosis result of the diagnosis item 2 is abnormal.
Characters are displayed on the monitor 11 by 0. In addition, 1 is added to the value of the cumulative value of the number of times of abnormality occurrence of the failure diagnosis item 2 in the RAM 8.
Is added.

Next, the CPU 7 controls the input signal switching circuit 5
Is switched to the failure diagnosis signal 3 of the diagnosis item 3. The failure diagnosis signal 3 passes through the input signal switching circuit 5 and the AD converter 6
Is converted into a digital signal and read by the CPU 7. The CPU 7 checks whether the read A / D conversion value of the failure diagnosis signal 3 is within a specified range, and diagnoses as abnormal if it is not within the specified range. If it is determined that the diagnosis is abnormal, the CPU 7 informs the character generation circuit 1 that the diagnosis result of the diagnosis item 3 is abnormal.
Characters are displayed on the monitor 11 by 0. In addition, 1 is added to the value of the total value
Is added.

Next, the CPU 7 controls the input signal switching circuit 5
Is switched to the failure diagnosis signal 4 of the diagnosis item 4. The failure diagnosis signal 4 passes through the input signal switching circuit 5 and the AD converter 6
Is converted into a digital signal and read by the CPU 7. The CPU 7 checks whether the read A / D conversion value of the failure diagnosis signal 1 is within a specified range, and diagnoses an abnormality if it is not within the specified range. If it is diagnosed as abnormal, the CPU 7 informs the character generation circuit 1 that the diagnostic result of the diagnostic item 4 is abnormal.
Characters are displayed on the monitor 11 by 0. In addition, 1 is added to the value of the total number of times of occurrence of abnormality of the failure diagnosis item 4 in the RAM 8.
Is added.

Further, the CPU 7 is provided with a total value reading switch 12, and when the reading switch 12 is pressed, C
The PU 7 reads out the cumulative value of the number of abnormal occurrences of the failure diagnosis items 1 to 4 from the storage area of the total number of abnormal occurrences in the RAM 8 and displays the characters on the monitor 11 by the character generation circuit 10.

Since the values that can be stored in the failure occurrence total value storage area for the failure diagnosis items 1 to 4 are finite, if the total value exceeds a certain value, it is held at that value. Also CP
A cumulative value initialization switch 13 is provided for U7. When the cumulative value initialization switch 13 is pressed, the CPU 7 stores 0 in the failure occurrence cumulative value storage area of the failure diagnosis items 1 to 4 and initializes the area. .

The above operation is repeated at a constant period. Since the power of the RAM 8 is held by the lithium battery 9, even if the power of the apparatus is turned off, the stored contents are held.

In this embodiment, the number of failure diagnosis items is four, but the same operation can be performed for more failure diagnosis items. Also, the above total value is divided into the total value from the immediately preceding power-on and the total value from the past to divide the RA.
The provision of the separating means for storing in M8 enables more detailed failure diagnosis. A method is also possible.

[0020]

According to the present invention, in the television camera device, the number of abnormal occurrences is accumulated for the item diagnosed as abnormal as a result of the failure diagnosis, and the accumulated value can be stored and read. It is possible to know later that an abnormal phenomenon has occurred even if the frequency is low and the user of the device may overlook it, and it is possible to quickly analyze the cause of the failure and analyze the failure of the television camera device. Rate can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a failure diagnosis system according to the present invention.

FIG. 2 is a data layout diagram of a RAM.

[Explanation of symbols]

 1: Failure diagnosis signal of failure diagnosis item 1 2: Failure diagnosis signal of failure diagnosis item 2 3: Failure diagnosis signal of failure diagnosis item 3 4: Failure diagnosis signal of failure diagnosis item 4 5: Input signal switching circuit 6: AD conversion Unit 7: CPU 8: RAM 9: Lithium battery 10: Character generation circuit 11: Monitor 12: Cumulative value reading switch 13: Cumulative value initialization switch

Claims (2)

[Claims] 1. A television camera, comprising: a means for accumulating the number of times an abnormality has occurred in a failure diagnosis result for each failure diagnosis item; and a means for storing and reading the accumulated value. Device failure diagnosis method. 2. The failure diagnosis method according to claim 1, wherein the number of times of occurrence of an abnormality in the failure diagnosis result is accumulated for each of a plurality of divided periods.