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Cable-fault on-line detection device based on wide-band chaotic signal and detection method thereof

A technology for cable faults and chaotic signals, which is applied in the direction of measuring devices, fault locations, and fault detection according to conductor types, etc., can solve the problems of expensive equipment, limited measurement accuracy of sequence time domain reflection method and pseudo-random sequence, etc., and achieve simple structure , Low price, cost reduction effect

Inactive Publication Date: 2016-04-06
ZHENGZHOU TECHN COLLEGE
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the measurement accuracy of sequence time domain reflectometry is limited by the rate of the pseudo-random sequence, the higher the rate, the higher the accuracy, and the more expensive the high-speed pseudo-random generator

Method used

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  • Cable-fault on-line detection device based on wide-band chaotic signal and detection method thereof
  • Cable-fault on-line detection device based on wide-band chaotic signal and detection method thereof
  • Cable-fault on-line detection device based on wide-band chaotic signal and detection method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment one: see Figure 1-2 , a cable fault on-line detection device based on broadband chaotic signals, including an electrical chaos source (Colpittsoscillator), a power divider (PD), a data acquisition card and a computer.

[0031] The electrical chaos source includes a single-stage Colpitts chaotic circuit, and the electrical chaos source is composed of a transistor Q 1 , inductance L, capacitance C 1 and C 2 Composition, transistor Q 1 As a nonlinear gain device in the circuit, it is the core of the chaotic oscillation generated by the circuit. The inductance L and the capacitance C 1 and C 2 Together they form a resonant network. Inductance L 0and capacitance C 0 A filter circuit is formed to isolate the DC power supply and the AC oscillation in the circuit from each other. The generated oscillating signal passes through the coupling capacitor C 5 with transistor Q 2 An emitter follower composed of other components is connected, and the chaotic signa...

Embodiment 2

[0033] Embodiment two: see Figure 3-8 , an online cable fault detection method using the broadband chaotic signal-based cable fault online detection device described in Embodiment 1, comprising the following process:

[0034] The electrical chaos signal generated by the electrical chaos source is divided into two channels through a 95:5 power divider (PD): the low-power signal PD1 with an output energy of 5% is used as a reference signal, and is directly input into the data acquisition card; the output energy is 95%. The high-power signal PD2 is divided into two identical signals through a T-shaped connector: one is injected into the transmission cable under test as a detection signal, and part of it is reflected to form a reflected signal after encountering a fault, and the other is used as a base signal. All the signals are ultimately converted and stored by the data acquisition card, and then the computer reads the data from the data acquisition card and performs related c...

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Abstract

A cable-fault on-line detection device based on a wide-band chaotic signal and a detection method thereof are disclosed. An electrical chaotic source, a power divider, a data acquisition card and a computer are included. An output terminal of the electrical chaotic source is connected to an input terminal of the power divider. An output terminal of the power divider comprises a low power signal output terminal and a high power signal output terminal. The low power signal output terminal is connected to an analog quantity input terminal of the data acquisition card. The high power signal output terminal is connected to an input terminal of a T-shaped connector. One output terminal of the T-shaped connector is connected to the analog quantity input terminal of the data acquisition card. The other output terminal of the T-shaped connector is connected to a detected cable and then is connected to the analog quantity input terminal of the data acquisition card. A digital quantity output terminal of the data acquisition card is connected to an input terminal of the computer. The detection device takes a chaotic signal generated by a single-stage Colpitts circuit as a detection signal. A chaotic signal correlation method is used to measure a fault point of the cable so that cable open circuit point positioning is realized.

Description

technical field [0001] The invention relates to the technical field of an online cable fault detection device and a cable fault online detection method, in particular to an online cable fault detection device and a cable fault online detection method based on broadband chaotic signals. Background technique [0002] With the rapid development of power and communication systems, people have achieved unprecedented convenience in transmitting and obtaining information. Various transmission lines account for an increasing proportion of national infrastructure, which has contributed to a huge network of transmission lines. However, affected by human factors and natural disasters, various losses of transmission lines are inevitable, which brings great harm to the country and society. Serious economic losses and potential safety hazards. Therefore, timely and accurate detection of transmission line faults is of great significance to ensure the timely restoration of communication an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/083G01R31/088
Inventor 马朝华郑晓茜李芬红张爱香王晓侃朱剑涛韩红兵赵国辉
Owner ZHENGZHOU TECHN COLLEGE
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