A method and circuit for clearing electrostatic charge of a potential detector in a space station

A technology of potential detector and detection circuit, which is applied in the direction of electrostatic field measurement, instrument, measuring device, etc., can solve the problem of increased measurement error of the detector, achieve the effect of solving the problem of excessive error, accurate and reliable measurement, and simple method

Active Publication Date: 2021-02-02
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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  • A method and circuit for clearing electrostatic charge of a potential detector in a space station
  • A method and circuit for clearing electrostatic charge of a potential detector in a space station
  • A method and circuit for clearing electrostatic charge of a potential detector in a space station

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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 a static charge clearing method and a zero clearing circuit of a space station potential detector, which can effectively solve the signal drift caused by the inherent leakage current of the differential capacitance voltage-dividing space station potential detector. Through the electrostatic charge clearing of the present invention, the Before the measurement, the voltage dividing capacitor restores the initial charge balance state when it is powered on, which can effectively solve the problem of excessive error caused by the continuous leakage of static charges when measuring the floating potential of the space station, making the detection of the floating potential of the space station more accurate and reliable. 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...

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Application Information

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Patent Type & Authority Patents(China)
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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