Area variable condenser mode digital serial output type angular displacement sensor

An angular displacement sensor and serial output technology, applied in the field of sensors, can solve problems such as vulnerability, breakage, failure, and deformation, and achieve the effects of strong adaptability, wide frequency range, and high sensitivity

CN1464284AInactive Publication Date: 2003-12-31INST OF ACOUSTICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2003-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The variable-are capacitive digital serial output type angular displacement sensor includes an angular converting capacitance measuring circuit comprising variable-frequency pulse generator, shaping emitter follower and control AND-gate circuit; and mechanical angular displacement structure. The variable-frequency pulse generator circuit has its input and earthing end connected via wires to the stator plate and the rotor plate of the mechanical angular displacement structure separately. Mechanical angular displacement variable is input via the angular displacement transmitting wheel in the angular displacement sensor, and through gear transmission the capacitor plate area is made to vary linearly with the input angular displacement and the variance in angular displacement is then found out based on the variance in the capacitance. In the control AND-gate circuit, the information conversion and transmission in different physical quantities is completed.
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Description

technical field

[0001] The invention relates to a sensor, in particular to a variable area capacitive digital serial output angular displacement sensor used for indicating signal detection. Background technique

[0002] The old type rudder position indicator of the aircraft can also be called "contact 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 ring 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 w...

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Embodiment Construction

[0038] The present invention will further describe embodiment in conjunction with accompanying drawing:

[0039] The mechanical part of the variable area capacitive digital serial output angular displacement sensor of this embodiment is according to figure 1 production, circuit part by figure 2 make.

[0040] The angular displacement mechanical part of the sensor includes: a base 5, a casing 6, a capacitive moving piece 7 and a capacitive fixed piece 8; the casing 6 is provided with a drive shaft 2 through a bearing, and a drive shaft 2 is fixedly connected with an angular displacement drive wheel 1 The angular displacement transmission wheel 1 drives the angular displacement output wheel 3 in the casing 6 through the transmission shaft 2, and the angular displacement output wheel 3 meshes with the capacitor driving wheel 4; 7 and capacitor fixed piece 8 are arranged crosswise; glands 9 are provided at both ends of capacitor moving piece 7 and capacitor fixed piece 8 . An an...