Distance variable condenser type digital parallel output type angular displacement sensor
An angular displacement sensor and capacitive technology, applied in the field of sensors, can solve problems such as deformation, vulnerability, breakage and failure, and achieve the effects of wide frequency range, strong adaptability and fast dynamic response
Inactive Publication Date: 2003-12-31
INST OF ACOUSTICS CHINESE ACAD OF SCI
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[0010] (1) To overcome the disadvantages of vulnerability, deformation, breakage and failure in some special occasions and environments with harsh objective conditions;
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[0040] The present invention will further describe embodiment in conjunction with accompanying drawing:
[0041] The mechanical part of the variable-pitch capacitive digital parallel output angular displacement sensor of this embodiment is as follows: figure 1 production, circuit part by figure 2 make.
[0042] The mechanical part of the angular displacement of the sensor includes: a reference shaft (screw) 15 for transmitting the angular displacement, the reference shaft 15 is designed as a standard fine thread screw in the shielding case 25, and the mechanical structure moving rod 6 that cooperates with the screw is a lead screw , when the screw 15 rotates 1 revolution (360 degrees), the axial movement of the lead screw 6 is 3 mm; when the screw 15 rotates 5 revolutions (5*360 degrees), the axial movement of the lead screw 6 is 15 mm. A capacitor formed by the upper capacitor fixed piece 8, the lower capacitor fixed piece 10 and the middle capacitor moving piece 9; wherei...
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The spacing-varying capacitive digital parallel output angular displacement sensor includes variable-frequency pulse generator, inverter, controlling AND gate circuit and 8-bit counter to constitute angle-to-capacitance conversion measuring circuit and angular displacement mechanical structure. The variable-frequency pulse generator has input and earth end connected via wires to capacitance sheet and lower static capacitance sheet of angular displacement mechanical structure with the upper and lower static capacitance sheets being shorted with one wire. The mechanical angular displacement variable is input via the rotating reference shaft and transmitted via the screw bolt to produce capacitor sheet distance variation in linear relation with the input angular displacement. The angular displacement variation is then found out based on the variation in capacitance. The controlling AND gate circuit and the 8-bit counter are used to complete the physical quantity information conversion and transmission.
Description
technical field [0001] The invention relates to a sensor, in particular to a variable pitch capacitive digital parallel output angular displacement sensor used for indicating signal detection. Background technique [0002] The old type rudder position indicator of aircraft can also be called "potentiometer type analog output type rudder angle displacement sensor", commonly known as "rotary potentiometer". The principle of the rotary potentiometer: When the cross-sectional area and resistivity of the resistance conductor are constant, its resistance value is proportional to the length of the resistance conductor. A movable mechanical compression spring brush is added to the circular resistance track, and the position of the brush on the circular resistance track is adjusted through the driving of the central axis, and the resistance value of the output terminal also changes with the angular displacement of the compression spring brush. Variety. [0003] The working principl...
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IPC IPC(8): B63H25/36G01B7/30
Inventor 赵志忠马慧刘宇杨树元侯朝焕王文魁冯波
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI