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Novel lightning stroke current measuring device

A lightning strike current and measurement equipment technology, applied in the direction of AC/pulse peak measurement, etc., can solve the problem of weak anti-electromagnetic interference ability, and achieve the effect of low cost, reduced power consumption, and low power consumption

Inactive Publication Date: 2014-07-02
BEIJING JIAYUE TONGLEJI ELECTRONICS
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  • Abstract
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  • Claims
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Problems solved by technology

Moreover, this method is easily affected by environmental factors such as temperature and humidity, and its ability to resist electromagnetic interference is also weak.

Method used

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Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the lightning current measuring device provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0044] figure 1 A functional block diagram of a lightning current measurement device is provided for this embodiment. Such as figure 1 As shown, the lightning strike current measuring device includes a Giant Magneto Resistive (GMR for short) current sensor 1 , a preamplifier 2 , a peak detection circuit 3 and a processor 6 . Among them, the GMR current sensor 1 is used to obtain the voltage signal corresponding to the magnitude of the lightning current; the preamplifier 2 is used to amplify the voltage signal obtained by the GMR current sensor 1; the peak detection circuit 3 is used to detect the peak value of the voltage signal And obtain the peak signal; the processor 6 obtains the value of the lightnin...

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Abstract

The invention provides a novel lightning stroke current measuring device. The novel lightning stroke current measuring device comprises a colossal magnetoresistance current sensor for obtaining a voltage signal corresponding to the size of lightning stroke current, a front amplifier for amplifying the voltage signal obtained by the colossal magnetoresistance current sensor, a peak value demodulation circuit for detecting the peak value of the voltage signal so as to obtain a peak value signal, and a processor for obtaining the value of the lightning stroke current according to the peak value signal. The lightning stroke current measuring device has the advantages of simple structure, low cost, high precision and convenient installation, is suitable for low-power occasions, and can be widely applied to occasions in need of lightning stroke current or flashover current measurement, such as high speed railways, intelligent power networks, base stations and the like.

Description

technical field [0001] The invention relates to the field of current sensors, in particular to a lightning strike current measuring device. Background technique [0002] Lightning is a common atmospheric discharge phenomenon in nature. When lightning occurs, it is accompanied by a large lightning strike current, which is likely to cause serious harm to production and living fields such as power transmission, electronic communication, and air transportation. In order to prevent lightning from causing harm to production and life, it is necessary to measure the parameters of lightning current generated by lightning. [0003] However, the lightning strike current has the characteristics of large dynamics, ultra-high voltage and high frequency, so that many known current measurement methods cannot be used to measure the lightning strike current. In the long-term research, it is found that the Rogowski coil has the advantages of basically no saturation and excellent high-frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/04
Inventor 时启猛冯淑兰
Owner BEIJING JIAYUE TONGLEJI ELECTRONICS
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