CN-121979031-A - DC signal interference event monitoring method and device and electronic equipment

CN121979031ACN 121979031 ACN121979031 ACN 121979031ACN-121979031-A

Abstract

The application relates to a direct current signal interference event monitoring device which comprises a signal coupling module, an interference detection module and a tracing module, wherein the signal coupling module is connected in series and used for accessing a direct current signal loop to extract an alternating current signal in the direct current signal loop, the interference detection module is used for monitoring an interference event according to the alternating current signal and a signal threshold value and recording time data of the interference event under the condition that the interference event is monitored, and the tracing module is used for matching the time data with equipment logs corresponding to the direct current signal loop and determining an interference source according to a matching result. The application solves the problem that the DC signal interference event is difficult to trace, and the time data of the interference event is matched with the equipment log to quickly lock the interference source and assist production technicians to locate the equipment misoperation reason.

Inventors

ZHANG LIJIN
HAN LEI
GU BIN
LIU XIN
GUO YANHAO
MA ZHIGANG
MA KE

Assignees

华电电力科学研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. A direct current signal interference event monitoring device, the device comprising: The signal coupling module is used for connecting in series with a direct current signal loop and extracting alternating current signals in the direct current signal loop; The interference detection module is used for monitoring an interference event according to the alternating current signal and the signal threshold value, and recording time data of the interference event under the condition that the interference event is monitored; And the tracing module is used for matching the time data with the equipment log corresponding to the direct current signal loop and determining an interference source according to a matching result.
2. The apparatus of claim 1, wherein the interference detection module comprises: The differential amplifying circuit is used for amplifying the alternating current signal to obtain an amplified signal; and the threshold comparator is used for comparing the amplified signal with the signal threshold value to judge whether an interference event occurs or not, and if so, outputting a trigger signal.
3. The apparatus of claim 2, wherein the threshold comparator comprises: a dynamic threshold comparator for obtaining a dynamic signal threshold according to the control signal when the control signal current value of the DC signal loop is not fixed, and judging whether an interference event occurs based on the dynamic signal threshold and the amplified signal And the fixed threshold comparator is used for judging whether an interference event occurs or not based on a preset fixed signal threshold and the amplified signal under the condition that the control signal current value of the direct current signal loop is fixed.
4. The apparatus of claim 2, wherein the interference detection module further comprises a time recording module, The time recording module is in communication connection with the threshold comparator and is used for recording the starting time and the duration of the interference event based on the real-time clock chip under the condition that the trigger signal sent by the threshold comparator is received.
5. The apparatus of claim 1, wherein the tracing module comprises: the data acquisition module is used for acquiring the equipment starting instruction and the equipment tripping instruction in the equipment log, and the actual starting time and the actual tripping time of the equipment; And the analysis module is used for judging whether the interference event is signal interference to cause misoperation or tripping of equipment according to the equipment starting instruction, the equipment tripping instruction, the actual starting time and the actual tripping time and the time data of the interference event.
6. The apparatus of claim 1, further comprising an optocoupler isolator for isolating the signal input from the signal output.
7. The apparatus of claim 1, further comprising a power module for powering the signal coupling module, the interference detection module, and the trace-source module through a wide-voltage DC-DC converter.
8. The apparatus of claim 1, wherein the apparatus further comprises: The signal analysis module is in communication connection with the signal coupling module, and pre-stores an interference type characteristic database established based on historical data, wherein the interference type characteristic database comprises standard signal characteristics corresponding to different interference source types; The signal analysis module is used for extracting the characteristics of the alternating current signal to obtain signal characteristics, matching the signal characteristics with the interference type characteristic database, and outputting a preliminary diagnosis conclusion of the interference type according to a matching result; the tracing module is further configured to match the time data with a device log corresponding to the dc signal loop, and determine, in combination with the preliminary diagnosis conclusion, an interference source that causes the interference event.
9. A method for monitoring a dc signal interference event, the method comprising: connecting in series with a direct current signal loop, and extracting an alternating current signal in the direct current signal loop; monitoring an interference event according to the alternating current signal and the signal threshold value, and recording time data of the interference event under the condition that the interference event is monitored; And matching the time data with the equipment log corresponding to the direct current signal loop, and determining an interference source according to a matching result.
10. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the dc signal interference event monitoring method of claim 8 when the computer program is executed by the processor.

Description

DC signal interference event monitoring method and device and electronic equipment Technical Field The present application relates to the field of industrial monitoring, and in particular, to a method and an apparatus for monitoring a dc signal interference event, and an electronic device. Background In industrial control systems, direct current signals (e.g., 4-20mA current signals, thermal resistor Pt100, etc.) are susceptible to electromagnetic interference (EMI), resulting in measurement jumps or equipment malfunction. In the prior art, a filter circuit or shielding measure is generally adopted to inhibit interference, but the occurrence time of an occasional interference event cannot be recorded. When the disturbance transient disappears, the fault cause is difficult to trace on site, and repeated faults frequently occur. At present, an effective solution is not proposed for the problem that a direct current signal interference event is difficult to trace the source in the related technology. Disclosure of Invention The embodiment of the application provides a direct current signal interference event monitoring method, a direct current signal interference event monitoring device, electronic equipment and a storage medium, which are used for at least solving the problem that a direct current signal interference event is difficult to trace. In a first aspect, an embodiment of the present application provides a device for monitoring a dc signal interference event, where the device includes: The signal coupling module is used for connecting in series with a direct current signal loop and extracting alternating current signals in the direct current signal loop; The interference detection module is used for monitoring an interference event according to the alternating current signal and the signal threshold value, and recording time data of the interference event under the condition that the interference event is monitored; And the tracing module is used for matching the time data with the equipment log corresponding to the direct current signal loop and determining an interference source according to a matching result. In some of these embodiments, the interference detection module comprises: The differential amplifying circuit is used for amplifying the alternating current signal to obtain an amplified signal; and the threshold comparator is used for comparing the amplified signal with the signal threshold value to judge whether an interference event occurs or not, and if so, outputting a trigger signal. In some of these embodiments, the threshold comparator comprises: a dynamic threshold comparator for obtaining a dynamic signal threshold according to the control signal when the control signal current value of the DC signal loop is not fixed, and judging whether an interference event occurs based on the dynamic signal threshold and the amplified signal And the fixed threshold comparator is used for judging whether an interference event occurs or not based on a preset fixed signal threshold and the amplified signal under the condition that the control signal current value of the direct current signal loop is fixed. In some of these embodiments, the interference detection module further comprises a time logging module, The time recording module is in communication connection with the threshold comparator and is used for recording the starting time and the duration of the interference event based on the real-time clock chip under the condition that the trigger signal sent by the threshold comparator is received. In some of these embodiments, the tracing module includes: the data acquisition module is used for acquiring the equipment starting instruction and the equipment tripping instruction in the equipment log, and the actual starting time and the actual tripping time of the equipment; And the analysis module is used for judging whether the interference event is signal interference to cause misoperation or tripping of equipment according to the equipment starting instruction, the equipment tripping instruction, the actual starting time and the actual tripping time and the time data of the interference event. In some of these embodiments, the apparatus further comprises an opto-coupler isolator for isolating the signal input from the signal output. In some embodiments, the device further comprises a power supply module for supplying power to the signal coupling module, the interference detection module and the tracing module through a wide-voltage DC-DC converter. In some of these embodiments, the apparatus further comprises: The signal analysis module is in communication connection with the signal coupling module, and pre-stores an interference type characteristic database established based on historical data, wherein the interference type characteristic database comprises standard signal characteristics corresponding to different interference source types; The signal analysis module is used for extracting