JPH0950315A - Abnormality detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality detection device which can confirm whether or not an abnormality detection part correctly detects the abnormality of the constitution part of a monitoring object device. SOLUTION: A pseudo abnormality signal generation part 2 sends a pseudo abnormality signal to an abnormality detection part 1 and confirms whether or not the part 1 normally operates when the abnormality is detected. If the abnormality of a monitoring object device is confirmed, the part 1 surely detects the abnormality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detecting device for detecting an abnormality in a monitored device.

[0002]

2. Description of the Related Art FIGS. 2 and 3 are block diagrams of a main part of a conventional abnormality detection device for detecting an abnormality in a device to be monitored (such as an X-ray irradiation device). In the type shown in FIG. 2, a drive signal is supplied from a drive or sequence circuit (hereinafter referred to as a drive circuit) 101 that constitutes a monitored device to a driven portion 102. The drive circuit 101 and the driven part 102 are respectively connected to the abnormality detection part 103, and when an abnormality occurs in the drive circuit 101 or the driven part 102, an abnormality signal is sent to the abnormality detection part 103. The abnormality detection unit 103 that has received the abnormality signal sends a signal indicating that there is an abnormality to the display unit 104, and the display unit 104 displays an abnormality.

Further, in the type shown in FIG. 3, the changeover switches 105a, 105 are used when the abnormality detecting section 107 detects an abnormality in the driving circuit 101 or the driven section 102.
5b is driven to switch to the abnormality occurrence side 106.
By this switching, an alarm means or the like (not shown) provided on the abnormality occurrence side 106 warns of the occurrence of the abnormality.

[0004]

However, in the case of the type shown in FIGS. 2 and 3, when an abnormality of the drive circuit 101 or the driven portion 102 is detected, an abnormality display or an alarm is issued, but the abnormality is generated. Detection units 103 and 10
When a failure (abnormality) occurs in itself 7, it does not have any failure display function.

In this case, when an abnormality occurs in the drive circuit 101 or the driven section 102 of the monitored device when the abnormality detection unit 103 or 107 itself fails, the abnormality is not displayed on the display unit 104, Since it is not possible to switch to the abnormality occurrence side 106, the operator cannot immediately take appropriate measures. Therefore, an abnormality in the initial stage of the drive circuit 101 or the like of the device to be monitored cannot be detected, which may cause a serious failure or damage to the device to be monitored, or even a personal injury.

Therefore, an object of the present invention is to provide an anomaly detection device for confirming whether or not an anomaly detection unit for detecting an anomaly in each component of a monitored device operates properly.

[0007]

In order to solve the above problems, according to the invention as set forth in claim 1, an abnormality detecting means for detecting an abnormality of a device to be monitored, and whether the abnormality detecting means operates normally. And a pseudo-abnormal signal generating means for generating a pseudo-abnormal signal for confirming whether or not it is included. According to the first aspect of the present invention, the abnormality detecting means detects an abnormality in the monitored device. The pseudo-abnormal signal generating means generates a pseudo-abnormal signal for confirming whether or not the abnormality detecting means operates normally. Therefore, it is possible to confirm whether or not the abnormality detecting means operates normally before the abnormality occurs in the monitored device, and therefore the monitored device always performs the abnormality detection reliably.

According to a second aspect of the present invention, when the abnormality detecting means does not operate normally due to the pseudo abnormal signal from the pseudo abnormal signal generating means, a signal for prohibiting the subsequent operation of the monitored device. Is provided with an operation prohibition signal generating means. According to the second aspect of the invention, the operation prohibition signal generating means prohibits the subsequent operation of the monitored device when the abnormality detecting means does not operate normally due to the pseudo abnormal signal from the pseudo abnormal signal generating means. Generate a signal. Therefore, the device to be monitored is always under the monitoring of the abnormality detecting means that operates normally (without abnormality).

The invention according to claim 3 is characterized in that the pseudo-abnormal signal generation timing of the pseudo-abnormal signal generation means is before the abnormality detection means starts the abnormality detection operation or during the abnormality detection operation. . According to the third aspect of the present invention, the pseudo abnormal signal generation timing from the pseudo abnormal signal generating means is before the abnormality detecting means enters the abnormality detecting operation or during the abnormality detecting operation, so that the monitored device is always normal. It is placed under the supervision of an operating (no abnormality) abnormality detecting means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same reference numerals are given to the already described portions, and redundant description is omitted.

FIG. 1 is a block diagram of an example of an embodiment of an abnormality detecting device of the present invention. As shown in FIG. 1, the drive circuit 101 and the driven section 102 that constitute the monitored apparatus are connected to the abnormality detection section 1. Anomaly detector 1
Is connected to a pseudo abnormal signal generator 2 that generates a test pseudo abnormal signal and an operation command unit 3 that generates various operation command signals. The pseudo abnormal signal generator 2 is a drive circuit 1
01 is connected.

Further, the operation command section 3 is connected to the pseudo abnormal signal generating section 2, the drive circuit 101 and the abnormal display section 4.
Normally, between the drive circuit 101 and the abnormality detection unit 1,
The switch 5 that is on is connected, and the switch 5 is turned off by the control signal (shown by the dotted line) for generating an abnormal signal from the pseudo abnormal signal generator 2.

Next, the operation will be described. (1) Operation when a normal abnormality occurs (when an abnormality occurs in the drive circuit 101 or the like) When an abnormality occurs in the drive circuit 101 or the driven portion 102, the abnormality detection unit 1 detects the abnormality and the drive circuit 1
01 and the driven section 102, an operation prohibition signal for prohibiting the subsequent operation is sent, and the operation command section 3 is notified of the occurrence of an abnormality. As a result, the drive circuit 101 and the driven section 102 stop the subsequent series of operations, and the operation command section 3 sends a command signal for displaying an abnormality to the abnormality display section 4, so that the abnormality display section 4 displays an abnormality. The operator displays the error display section 4
Take the necessary measures such as repairing by visually observing the abnormal display of.

(2) Operation at the time of generation of pseudo abnormal signal The operation command unit 3 operates before the operation of the monitored device is started,
When there is a request for generating a pseudo abnormal signal due to a test mode or the like during the operation of the device, a command is issued to the pseudo abnormal signal generating section 2 to send out the pseudo abnormal signal. Simultaneously with the transmission of the pseudo abnormal signal, a signal for turning off the switch 5 is transmitted from the pseudo abnormal signal generator 2 to the switch 5. When the switch 5 is turned off, the abnormality detection signal is prevented from being sent to the abnormality detection unit 1 from the drive circuit 101 which receives the pseudo abnormal signal.

When the abnormality detecting section 1 which has received the pseudo abnormal signal operates normally, the operation command section 3 causes the abnormality detecting section 1 to operate.
Determines that the abnormality is normally detected, the transmission of the pseudo abnormality signal is stopped, and the original operation of the monitored device is restored.

When the abnormality detecting unit 1 does not receive the pseudo-abnormal signal, the operation command unit 3 determines that the abnormality detecting unit 1 is abnormal, and notifies the abnormality (operator etc.) to the outside. After that, a series of scheduled operations of the monitored device is stopped. As a result, the device to be monitored is under the monitoring of the abnormality detection unit 1 which has been confirmed to be fully operating.

[0017]

As described above, according to the invention described in each claim, the pseudo-abnormal signal generating means sends the pseudo-abnormal signal to the abnormality detecting means, and whether or not the abnormality detecting means operates normally when the abnormality is detected. Also, if the abnormality detection means does not operate normally, the subsequent operation of the monitored device is stopped, so the monitored device is always reliably monitored for abnormalities, and by any chance When an abnormality is found in the device, the subsequent operation is stopped immediately. Therefore, the monitoring target device provided with the abnormality detection device of the present invention allows an operator or the like to deal with the abnormality / fault in the initial stage, and thus the occurrence of a serious abnormality can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of an example of an embodiment of the present invention.

FIG. 2 is a block diagram of a first example of a conventional abnormality detection device.

FIG. 3 is a block diagram of a second example of a conventional abnormality detection device.

[Explanation of symbols]

 1 Abnormality Detection Section (Abnormality Detection Means) 2 Pseudo Abnormal Signal Generation Section (Pseudo Abnormal Signal Generation Means) 3 Operation Command Section (Operation Prohibition Signal Generation Means) 4 Display Section 5 Switch 101 Drive or Sequence Circuit 102 Driven Section

Front Page Continuation (72) Inventor Masafumi Motoyama 1st Toshiba Town, Fuchu City, Tokyo Inside the Fuchu Factory, Toshiba Corporation

Claims (3)

[Claims] 1. An abnormality detecting means for detecting an abnormality of a device to be monitored, and a pseudo abnormal signal generating means for generating a pseudo abnormal signal for confirming whether or not the abnormality detecting means operates normally. An abnormality detection device characterized by the above. 2. The operation prohibition signal generating means for generating a signal for prohibiting the subsequent operation of the monitored device when the abnormality detecting means does not operate normally due to the pseudo abnormal signal from the pseudo abnormal signal generating means. The abnormality detection device according to claim 1, further comprising: 3. The abnormality detecting device according to claim 1, wherein the pseudo abnormality signal generating timing of the pseudo abnormality signal generating means is before the abnormality detecting means starts the abnormality detecting operation or during the abnormality detecting operation. .