Design method for short rods of spherical sensor for space electric field detection
A design method, the technology of space electric field, applied in the direction of electrostatic field measurement, etc., can solve the problems such as the design of short rods that are not introduced, and achieve the effect of improving the ability to resist the mechanical environment and improving the accuracy
Inactive Publication Date: 2014-12-24
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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[0003] In the document "ICE, the electric field experiment on DEMTER", the electric field detector carried by the French DEMETER satellite is introduced. The sensor of the detector also adopts a spherical structure with short rods at both ends, and introduces short rods and symmetrical short rods. role, but the specific short-game design is not introduced in the article
However, there is no space electric field detector successfully applied to satellite platforms in China.
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[0040] For a spherical sensor with a spherical shell radius of 40mm and an orbital height with a minimum solar angle of 30°, according to the above factors, the length of the short rod is designed to be 50mm, the outer diameter is 20mm, and the column sections are designed with four air outlets distributed in the circumferential direction. . The short stem design enables the following functions:
[0041] 1) It can ensure that within a certain range of solar incidence angles, the solar radiation area received by the sensors in different azimuths of the satellite is consistent, thereby ensuring the consistency of photocurrent emission on the sensor surface. When the satellite is at different orbital heights, the minimum sun incidence angle is different, and the tangent between the minimum sun incidence angle and the spherical shell determines the range of the sun incidence. Depend on figure 2 As shown, according to the radius R of the spherical shell and the distance L from t...
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The invention provides a design method for short rods of a spherical sensor for space electric field detection. The method includes the specific process that the allowed minimum length l<min> of each short rod is calculated, and then the length l of the short rod is selected within the range that l<min><=1<=2R; when the two short rods are installed on the spherical sensor, the area of a intercepted spherical crown is not larger than 1 / 10 of the surface area of a spherical shell, and it is calculated that the outer diameter d of each short rod is smaller than 0.62R; according to the calculated l and the calculated d, the hollow cylindrical short rods are designed, and a plurality of circular through holes are formed in the circumferential direction of each short rod. The short rods designed with the method can meet the requirement for application to space environment.
Description
technical field [0001] The invention relates to a design method of a short rod in a spherical sensor used for space electric field detection, and belongs to the technical field of space environment detection. Background technique [0002] Space electric field detection is to use the potential method of the sensor surface to sense the space plasma environment where it is located to achieve the purpose of electric field measurement. At present, it is mostly used on the satellite platform to use the extension rod to extend a plurality of spherical sensors into space for measurement. In order to ensure that the induced potential of the spherical sensor spherical shell is not affected by the satellite potential, a short rod with potential bootstrapped at the potential of the spherical shell is designed at the connection between the sensor and the extension rod, and a symmetrical short rod is designed at the other end of the spherical shell. Designing a symmetrical short rod can ...
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IPC IPC(8): G01R29/12
Inventor 李诚马勉军刘泽王佐磊李增科银东东
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH