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Integrated optical isolation lightning electric field measurement apparatus

An electric field measuring instrument and optical isolation technology, which is applied in the direction of electrostatic field measurement, voltage/current isolation, etc., can solve the problems of increasing system complexity, inconvenient movement, and large volume of the electric field instrument, so as to improve stability and reliability, Stable and reliable waterproof, ensure the effect of Ca value

Inactive Publication Date: 2011-02-02
PLA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Obviously, the measurement results of the fast-changing electric field instrument mainly reflect the time-domain characteristics of the lightning electromagnetic pulse, and basically cannot reflect the slow change of the ground induced electric field caused by the charge redistribution between the cloud and the ground caused by the lightning discharge process; It can well reflect the change of the ground induced electric field and the slow change trend of the lightning electromagnetic pulse field, but it cannot fully reflect the details of the fast change of the electric field
[0003] Using fast and slow electric field meters to measure the ground electric field separately also brings troubles to the setting of the post signal acquisition and recording equipment. Due to the mutual restriction of the measurement bandwidth and the range of the measurement amplitude, two sets of acquisition and recording systems have to be used respectively. completed, thereby increasing the complexity of the system
In addition, the electric field meter uses AC power supply and cable transmission signal, which reduces the adaptability of the equipment due to the dependence on the mains power supply, and the power supply and signal transmission lines are also easy to introduce external interference; the entire electric field meter is large in size, which brings difficulties to system calibration. It is not convenient to move

Method used

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  • Integrated optical isolation lightning electric field measurement apparatus
  • Integrated optical isolation lightning electric field measurement apparatus
  • Integrated optical isolation lightning electric field measurement apparatus

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Embodiment Construction

[0037] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] figure 2 Shown is an implementation form of the connection structure of the antenna part. The disc antenna is connected downwards through the screw-nut structure 2-3, the other end of the nut is fixed on the outer insulating material 5 to ensure insulation from the disc, and the core wire is connected to the BNC adapter 6-7 through a wire and fixed at the bottom on the metal casing 9.

[0039] An implementation of the entire instrument refers to image 3 . The antenna 1 introduces signals into the metal casing through the connection structure 10 . The metal housing has a built-in signal conditioning circuit, an optical transmitter and a large-capacity lithium battery. The circuit is controlled by the waterproof switch 11, and the working state is indicated by the indicator light 12. Open the switch 11 at the beginning of the measurement, ...

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Abstract

The invention discloses an integrated optical isolation lightning electric field measurement apparatus, which integrates the measurement of fast change and slow change of a lightning electric field. The measurement apparatus mainly comprises an electric field receiving antenna, a signal conditioning circuit, an optical transmitter, an all-dielectric optical cable, an optical receiver and a signal acquisition and real-time processing terminal. The signal conditioning circuit and the optical transmitter are integrated to realize signal acquisition and photoelectric conversion and transmit an optical signal through the all-dielectric optical cable. The entire conditioning circuit and the optical transmitter are closed in a flat metal cylindrical box, and have high electromagnetic interference resistance. The optical receiver converts the received optical signal into an electrical signal which is subjected to compensation, correction and amplification and then output to a recording apparatus. A signal of which the change (slow change or fast change) is not measured is inverted by a system function inversion method according to a certain change (fast change or slow change) signal of the measured electric field. Apart from simple structure and small volume, the integrated optical isolation lightning electric field measurement apparatus, which adopts optical fiber transmission and is powered by lithium batteries, has the advantages of high reliability, high adaptability, high electromagnetic interference resistance, adjustable dynamic range of measurement and high precision.

Description

1. Technical field [0001] The invention relates to an electric field change measuring device, in particular to the measurement of all electric field information (including induction field and lightning electromagnetic pulse field) in the case of lightning. 2. Background technology [0002] In today's society, with the continuous improvement and wide application of microelectronic devices, lightning disasters pose an increasingly serious threat to people's production and life. Even if they are not directly struck by lightning, the lightning caused by the electromagnetic radiation of lightning discharge current Electromagnetic pulse can damage electronic and electrical equipment and systems within 2km from the lightning strike point. Therefore, it is of great significance to study the measurement of the electric field in the lightning process. Regarding the instruments for measuring the lightning electric field, it can be traced back to 1960. Kitagawa and Brook first proposed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12G01R15/22
Inventor 周璧华郭建明邱实李炎新杨波
Owner PLA UNIV OF SCI & TECH
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