Nonlinear micro-current acquisition device and method suitable for Langmuir probe

A technology of Langmuir probe and acquisition device, which is applied in the field of nonlinear microcurrent acquisition device, can solve the problems of large surface area, inapplicability, and large acquisition current of the probe, and achieves improved signal-to-noise ratio, low working power consumption, The effect of high-precision acquisition

Active Publication Date: 2021-05-28
SHANDONG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

The scientific research and test satellite "Zhangheng-1" independently developed by our country was successfully launched on February 2, 2018 on board the Long March-2D carrier rocket. As one of the payloads of the Zhangheng-1 satellite, the Langmuir probe system can realize 5 ×10 8 -1×10 13 m -3 However, since the Zhangheng-1 satellite does not belong to the ranks of microsatellites, the surface area of ​​the probe is relatively large, and the acquisition current is relatively large, so this acquisition system is not suitable for the Langmuir probe system of microsatellites; in addition, Taiwan's "Central University "The team integrated a planar Langmuir probe (PLP), a slow potential analyzer (RPA), an ion drift meter (IDM) and an ion trap (IT) in a detection system. The whole system can realize the electron density and temperature, The measurement of ion density and temperature and ion drift velocity, the whole system has achieved good results

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  • Nonlinear micro-current acquisition device and method suitable for Langmuir probe
  • Nonlinear micro-current acquisition device and method suitable for Langmuir probe
  • Nonlinear micro-current acquisition device and method suitable for Langmuir probe

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Embodiment 1

[0048] This embodiment provides a nonlinear microcurrent collection device suitable for Langmuir probes;

[0049] Such as Figure 9 As shown, the nonlinear microcurrent acquisition device suitable for Langmuir probes includes:

[0050] Several parallel Langmuir probes;

[0051] The first end of each Langmuir probe is disposed in the plasma of the ionosphere;

[0052] The second end of each Langmuir probe is connected with a nonlinear acquisition amplifier circuit;

[0053] The nonlinear acquisition and amplification circuit is also connected to the output end of the scanning voltage loading circuit; the input end of the scanning voltage loading circuit is also connected to the Microcontroller Unit (MCU);

[0054] The nonlinear acquisition amplifier circuit is also connected with the input end of the low-pass filter circuit;

[0055] The output terminal of the low-pass filter circuit is connected with the micro control unit MCU;

[0056] The micro control unit MCU is conne...

Embodiment 2

[0174] This embodiment provides a nonlinear microcurrent acquisition method suitable for Langmuir probes;

[0175] Nonlinear microcurrent acquisition methods for Langmuir probes, including:

[0176] The micro control unit MCU outputs a small-scale scanning voltage through a built-in DA module; the small-amplitude scanning voltage is 0-3.3V;

[0177] After the scanning voltage of small amplitude is processed by the scanning voltage loading circuit, it becomes a scanning voltage of -10V ~ 10V; the scanning voltage of -10V ~ 10V is applied to the Langmuir probe;

[0178] The potential on the Langmuir probe attracts charged particles to hit the surface of the Langmuir probe. The impact of charged particles causes the potential of the Langmuir probe to be uneven, causing current to flow, and the magnitude and direction of the current on the Langmuir probe respond The physical properties of the plasma;

[0179] The nonlinear acquisition and amplification circuit collects the curre...

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Abstract

The invention discloses a nonlinear micro-current acquisition device and method suitable for Langmuir probes. The nonlinear micro-current acquisition device comprises a plurality of parallel Langmuir probes, wherein the first end of each Langmuir probe is arranged in the plasma of an ionized layer, the second end of each Langmuir probe is connected with a nonlinear acquisition amplification circuit, the nonlinear acquisition amplification circuit is also connected with the output end of a scanning voltage loading circuit, the input end of the scanning voltage loading circuit is also connected with a micro-control unit, the nonlinear acquisition amplification circuit is also connected with the input end of a low-pass filter circuit, the output end of the low-pass filter circuit is connected with the micro-control unit MCU, and the MCU is connected with a satellite center machine communication interface.

Description

technical field [0001] The present application relates to the technical field of ionospheric plasma diagnosis, in particular to a nonlinear micro-current acquisition device and method suitable for Langmuir probes. Background technique [0002] The statements in this section merely mention the background art related to this application, and do not necessarily constitute the prior art. [0003] As the altitude increases, the atmosphere gradually becomes thinner, and the gas molecules are partially ionized by extreme ultraviolet radiation, forming a plasma state of the ionosphere. Due to the difference in the intensity of solar radiation and the influence of various other environmental factors, the plasma in the ionosphere presents irregular shapes on a spatial scale and changes in physical properties on a time scale. Plasma clouds in the ionosphere vary on spatial scales from a few meters to thousands of meters. The scale change of plasma cloud and the change of plasma physi...

Claims

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Application Information

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IPC IPC(8): G01R19/25H05H1/00
CPCG01R19/25H05H1/0075
Inventor 杜清府王进郭怀龙张清和李建泉邢赞阳
Owner SHANDONG UNIV
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