Design of Langmuir Probe and Its Deployable Mechanism
In order to achieve the measurement of plasma parameters in the space environment,this paper designs and manufactures a Langmuir probe and its deployable mechanism based on the requirements of a certain aero-space mission.The Langmuir probe is mainly composed of sensors,circuit boxes,and deployable mechanisms,and has two working states:locking mode and unfolding mode;the deployable mechanism consists of a rotating part and an extending part,driven by torsion springs and compression springs.To improve the dimensional stability of the mechanism,the manufacturing process has carried out aging and high/low temperature shaping treatment on each cylinder.The surface of the spherical sensor is coated with gold to ensure corrosion resistance and conduc-tivity.The feasibility and accuracy of the designed Langmuir probe have been verified through testing in ground environments,which has important practical significance for the study of deployable mechanisms.
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