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Cable fault on-line detecting and positioning device

A technology of cable fault and locating device, applied in the direction of fault location and other directions, can solve the problem of not being able to detect the cable online.

Inactive Publication Date: 2015-10-14
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TDR and FDR technologies are relatively mature, economical and reliable, and widely used. However, because the detection signal will affect the original working signal in the cable, they cannot perform online detection on the cable.

Method used

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  • Cable fault on-line detecting and positioning device
  • Cable fault on-line detecting and positioning device
  • Cable fault on-line detecting and positioning device

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Embodiment Construction

[0026] The details involved in the implementation process of the present invention will be described in detail below in conjunction with the accompanying drawings, so as to support the claims.

[0027] Such as figure 1 As shown, the cable fault online detection and location device of the present invention mainly includes an FPGA module with a NIOS II soft-core processor, a high-speed DA module, a signal conditioning module, an isolation coupling module and a high-speed AD module. According to the circular correlation theorem, in the FPGA module built with NIOS II soft-core processor, the incident signal and the reflected signal are fully digitally processed, and the fault information including the fault type and fault distance of the tested cable is extracted.

[0028] The FPGA module with NIOS II soft-core processor provides the clock required by each module, generates the detection signal modulated by m-sequence and sine wave, realizes the related operation processing of det...

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Abstract

The invention discloses a cable fault on-line detecting and positioning device. The device includes an FPGA module with an NIOS II soft core processor, a high-speed DA module, an isolation coupling module, a high-speed AD module and a conditioning circuit. The FPGA module provides clocks needed by all modules, generates a detection signal formed by modulation of an m sequence and sine waves, performs related operation processing of the detection signal and a reflection signal, and positions cable faults. The high-speed DA module is used for digital analog conversion of the detection signal generated by the FPGA module. The isolation coupling module isolates an output signal of the high-speed DA module and couples the output signal to a cable, and also isolates a reflection signal in the cable and couples the reflection signal to a detection positioning device. The high-speed AD module carries out analog-to-digital conversion of the reflection signal in the cable and then sends the signal to the FPGA module for processing. The conditioning circuit is used for conditioning the output signal of the high-speed DA module and an input signal of the high-speed AD module. The device has an on-line detection function, is high in positioning precision, and exhibits a high anti-interference capability.

Description

technical field [0001] The invention relates to an online cable fault detection and positioning device, which belongs to the field of cable fault detection. Background technique [0002] At present, the country's modernization is advancing rapidly, and industrialization and informatization are deepening. A large number of power distribution networks and electrical and electronic systems play a pivotal role in all walks of life. The wires and cables used are also densely distributed and increasingly complex. Due to the frequent work in harsh environments such as high temperature, vibration, friction, etc., the wires and cables buried deep in the structure and the bottom layer are prone to cracks and wear with age, and are gradually aging and damaged. Accidents caused by cable failures in all walks of life are increasing, causing huge losses to the national economy, and burying a great hidden danger to personal and property safety. [0003] In this situation, various cable fa...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 尹晶袁渊明赵玉磊王莉秦剑华
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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