JPS62274858A - Fault detection system - Google Patents

Abstract

PURPOSE:To reduce the operation of a maintainer and to shorten a time required for fault detection by using a rest signal generator and a test signal detector built in the titled system to detect a fault automatically. CONSTITUTION:A test signal is generated by a test signal generating means 51 and inputted to a line connection circuit 101 for executing a test through a switch circuit 30. In the circuit 101, the test signal is loop-backed by a loopback switch means 111. The loopback test signal is inputted to a test signal detecting means 52 through the switch circuit 30 and its falut is detected by the means 52. Said operation is automatically executed under control by a control means 40. Since a fault of the circuit 101, the switch circuit 3 or a path between both the circuits 101, 3 is automatically detected and informed to the maintainor, the operation of the maintainer can be reduced and the time required for the fault detection can be shortened.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a fault detection method for a data communication line connection device. In particular, it is equipped with a plurality of line connection circuits, a switch circuit connected to the line connection circuit via four wires, a line connection circuit, and a control circuit that controls the switch circuit. This invention relates to a fault detection method for a connected line connection device.

〔overview〕

The present invention is a fault detection method for line connection equipment that automatically connects paths even during operation and automatically detects faults using a built-in test signal generator and test signal detector. This reduces the number of operations required by the operator and shortens the time required to detect faults.

[Conventional technology]

FIG. 2 is a block diagram of a conventional failure detection device. Conventionally, in a fault detection device for a line connection device, as shown in FIG. The line connection circuit 20 is closed and the switch circuit 30 is forcibly driven to connect the line connection circuit 10 and the line connection circuit 20.

A test signal generator 60 is connected to the line connection circuit 10 from the outside, and a test signal detector 70 is connected to the line connection circuit 20, and the test signal from the test signal generator 60 is detected by the test signal detector 70. This was done by checking whether or not.

[Problem that the invention seeks to solve]

However, in such a conventional fault detection device, an abnormality is detected only after a test circuit is connected from the outside and a test is performed, so there are drawbacks that maintenance personnel have to perform many operations and fault detection takes time.

The present invention solves the above-mentioned drawbacks, and aims to provide a fault detection method that requires fewer operations by a maintenance worker and shortens the time required for fault detection.

[Means for solving problems]

The present invention provides a plurality of line connection circuits, a switch circuit that interconnects the plurality of line connection circuits, a control circuit that controls connections between the switch circuit and the line connection circuit, and the line control circuit and the above line connection circuit. In a fault detection method comprising means for detecting a fault in a switch circuit,
The means for detecting the fault includes a test signal generating means for generating a test signal and outputting it to the switch circuit, a return switch means for inputting the test signal from the switch circuit and returning it to the switch circuit, and a return switch means for inputting the test signal from the switch circuit and returning it to the switch circuit, It is characterized by comprising a test signal detection means for inputting a test signal returned from the circuit and detecting a fault, and a control means for controlling the test signal detection means, the test signal generation means, and the return switch means. .

[Effect]

A test signal is generated by the test signal generating means. This test signal is input to the line connection circuit that performs the test via the switch circuit. In the line connection circuit, this test signal is returned by a return switch means. This returned test signal is input to the test signal detection means via the switch circuit, and the test signal detection means performs failure detection. The above operations are automatically performed under the control of the control means. As described above, it is possible to reduce the number of operations required by the maintenance personnel and shorten the time required for failure detection.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a failure detection device according to an embodiment of the present invention. In FIG. 1, a line connection circuit 10 and a line connection circuit 20 are connected to a switch circuit 3o.

Here, the feature of the present invention is the test portion surrounded by a dashed line. That is, the control circuit 4o is connected to the line connection circuit 10.20, the switch circuit 3o, and the test circuit 50, and a path connection between the line connection circuit 10 and the line connection circuit 20 is made via the switch circuit 30. Test circuit 50 is connected to switch circuit 30 via four wires.

φ Now, failure detection in the line connection circuit 101 will be explained. Under the control of the control circuit 40, a test signal is sent from the test signal generator 51 of the test circuit 5o via the switch circuit 3o to the line connection circuit 10. is connected to the input of the return switch 11+. Return switch 11. The test signal is connected to a test signal detector 52 to perform fault detection. The line connection circuit 10.20 is similarly provided with the folding switch 111 described above.

The operation of the failure detection device having such a configuration will be explained. In FIG. 1, line connection circuit 10. and test circuit 50
In order to confirm that the path therebetween is normal, the control circuit 4o instructs each circuit according to the following procedure.

■ Check that the line connection circuit 101 is not in use.

■ Return switch 111 in line connection circuit 10+
is operated to connect the path from the switch circuit 30 to the path toward the switch circuit 30.

(2) Drive the switch circuit 30 to connect the path between the line connection circuit 101 and the test circuit 50.

(2) The test signal generator 51 in the test circuit 50 is operated to send out a test signal.

(2) Confirm that the test signal detector 52 in the test circuit 50 normally receives the test signal.

■ Turn off the switches operated in items ■～■,
Release the pass.

■ However, during the processing of items ■ to ■, the line connection circuit 10,
When it becomes necessary to connect the line with other line connection circuits,
Moving on to item (2), the path for testing is released, that is, the path is connected to the requested line connection circuit.

By periodically carrying out the processing of items (1) to (2) for all line connection circuits 10.20, failures can be detected automatically and without any maintenance personnel's intervention.

〔Effect of the invention〕

As explained above, the present invention automatically detects a failure in a line connection circuit switch circuit or a path between a line connection circuit and a switch circuit, and notifies the maintenance person, thereby reducing the number of operations required by the maintenance person and detecting the failure. This has the excellent effect of shortening the time required. Further, when it becomes necessary to actually use the line connection circuit that is being tested or prepared for the test, there is an advantage that the test can be immediately stopped and the actual line connection process can be performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a failure detection device according to an embodiment of the present invention. FIG. 2 is a block diagram of a conventional failure detection device. 10.20...Line connection circuit, 11...Return switch, 30...Switch circuit, 40...1Ii11
'4n circuit, 50...Test circuit, 51.60...Test signal generator, 52.70...Test signal detector/Example - Fig. 1 Conventional example No. 2

Claims (1)

[Claims] (1) A plurality of line connection circuits, a switch circuit that connects the plurality of line connection circuits to each other, a control circuit that controls connections between the switch circuit and the line connection circuit, and the line control circuit and the switch. In a fault detection method, the fault detection means includes a test signal generating means for generating a test signal and outputting it to the switch circuit, and a test signal generating means for generating the test signal from the switch circuit. a return switch means for inputting the test signal and returning it to the switch circuit; a test signal detection means for inputting the test signal returned from the switch circuit and detecting a fault; the test signal detection means, the test signal generation means, and the and control means for controlling the return switch means.