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Electrostatic charge clearing method and circuit of space station potential detector

A potential detector and detection circuit technology, applied in electrostatic field measurement, instruments, measurement devices, etc., can solve the problem of increasing the measurement error of the detector, and achieve the effect of solving the problem of excessive error, accurate and reliable measurement, and simple method.

Active Publication Date: 2019-05-14
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

When working for a long time, it will cause the output measurement error of the detector to increase

Method used

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  • Electrostatic charge clearing method and circuit of space station potential detector
  • Electrostatic charge clearing method and circuit of space station potential detector
  • Electrostatic charge clearing method and circuit of space station potential detector

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Embodiment Construction

[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] Such as image 3 As shown, the space station potential detector includes a Langmuir probe 21 and a detection circuit 22, and the Langmuir probe 21 is connected to the detection circuit 22 through a wire, wherein the detection circuit 22 includes two serially connected high-voltage arm capacitors C1, The low-voltage arm capacitor C2 and the measurement amplifier circuit, the wire of the Langmuir probe 21 is connected to the high-voltage arm capacitor C1; the Langmuir probe is immersed in the space plasma and absorbs electrons and ions in the plasma environment. When the coupling is balanced, the space station The floating potential is negative. According to the background technology, the limit charging voltage of the space station under the combined effects of plasma environment charging and geomagnetic field induced charging can reach -112V. Consi...

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Abstract

The invention discloses an electrostatic charge clearing method and circuit of a space station potential detector. The problem of signal drift caused by an inherent leakage current of the differentialcapacitance voltage division type space station potential detector is effectively solved. Through electrostatic charge clearing, a voltage dividing capacitor is restored to be in a power-on initial charge balance state before measurement. The problem that an error exceeds the standard due to continuous leakage of electrostatic charge can be effectively solved when the floating potential of a space station is measured, so that the floating potential measurement in the potential detection of the space station is more accurate and credible. The method is simple, practical and reliable.

Description

technical field [0001] The invention belongs to the technical field of space potential detection, and in particular relates to a static charge clearing method and a zero clearing circuit of a space station potential detector. Background technique [0002] my country's space station operates in an orbit with an inclination angle of 42° and an altitude of 350km to 450km. This orbit is located in the F2 region of the earth's ionosphere, which is filled with a large amount of high-density low-temperature plasma. Since the space station uses a 100V high-power solar cell array, the potential of the exposed positive electrode on the solar cell array is higher than the plasma potential, which will absorb electrons from the plasma environment, which will cause the structural potential of the space station (relative to the space plasma) to rise. The potential is about -90V when the coupling is balanced. At the same time, due to the large size of the space station, its structure cutti...

Claims

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Application Information

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IPC IPC(8): G01R29/12G01R15/00
Inventor 赵振栋胡向宇孙迎萍刘海波苗育君王栋蔺璟
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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