Digital signal locking type spatial magnetic field detecting system

A space magnetic field and digital signal technology, applied in the direction of the magnitude/direction of the magnetic field, can solve the problems of inability to calculate signal FFT, difficulty in signal measurement, inability to provide signal detection phase and frequency, etc., to achieve the effect of convenient analysis and storage
CN102495380BActive Publication Date: 2013-07-10NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Publication Date
2013-07-10

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Abstract

The invention discloses a digital signal locking type spatial magnetic field detecting system, which is composed of an air core coil, a spatial magnetic field signal prefabricating unit, a prefabricating signal generator and a digital locking signal processing unit. The air core coil enables magnetic field signals to be converted into voltage signals which are transmitted to the spatial magnetic field signal prefabricating unit which transmits the signals to the digital locking signal processing unit, the digital locking signal processing unit timely adjusts the spatial magnetic field signal prefabricating unit and the prefabricating signal generator according to signal characteristics so as to form a signal closed loop feedback structure, the digital locking signal processing unit receives and calculates spatial magnetic field signals and prefabricating signals, the spatial magnetic field signals and the prefabricating signals are displayed on a liquid crystal display, a digital / analog converter is driven simultaneously, and analog voltage signals which are proportional to the spatial magnetic field signals are timely output. The digital signal locking type spatial magnetic fielddetecting system is mature in technique and high in reliability.
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Description

technical field

[0001] The invention belongs to the technical field of space magnetic field detection, in particular to a space magnetic field detection system characterized by digital signal locking. Background technique

[0002] When a single-phase ground fault occurs in the distribution network, in order to accurately locate the fault point of the line, people obtain the characteristic information of the fault line by detecting the spatial magnetic field formed by the current in the fault line, so as to judge the fault location of the line. In this fault location technology, accurate acquisition of spatial magnetic field information formed by the current is one of the core technologies for fault location. The existing spatial magnetic field detection technology is to induce a spatial magnetic field signal through an air-core coil, input the signal into a filter, then detect the signal amplitude through an analog circuit, and then display it on a digital tube or a liquid c...

Claims

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