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Distance variable condenser type impulse-width modulation output type angular displacement sensor

An angular displacement sensor and pulse width modulation technology, applied in the field of sensors, can solve the problems of being easily damaged, broken, failure, deformation, etc., to achieve the effect of small heat effect, fast dynamic response, and improved ability

Inactive Publication Date: 2004-09-29
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) To overcome the disadvantages of vulnerability, deformation, breakage and failure in some special occasions and environments with harsh objective conditions;

Method used

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  • Distance variable condenser type impulse-width modulation output type angular displacement sensor
  • Distance variable condenser type impulse-width modulation output type angular displacement sensor
  • Distance variable condenser type impulse-width modulation output type angular displacement sensor

Examples

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Embodiment 1

[0035] The angular displacement mechanical structure of a variable-pitch capacitive pulse width modulation output angular displacement sensor in this embodiment is as follows: figure 1 Fabrication, measurement circuit part by figure 2 make.

[0036] The angular displacement mechanical part of the sensor includes: a reference shaft (screw rod) 15 for transmitting angular displacement, the reference shaft 15 is designed as a standard fine thread screw in the shielding case 25, and the mechanical structure of the screw rod 15 is a moving rod 6, The moving rod 6 is a lead screw; when the screw rod 15 rotates 1 circle (360 degrees), the axial movement of the lead screw 6 is 3 mm; when the screw rod 15 rotates 5 circles (5*360 degrees), the The axial movement is 15mm. A capacitor formed by the upper capacitor fixed piece 8, the lower capacitor fixed piece 10 and the middle capacitor moving piece 9; wherein the upper capacitor fixed piece 8 and the middle capacitor moving piece 9 ...

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Abstract

The spacing-varying capacitive pulse width modulation output angular displacement sensor includes vibrator circuit, frequency divider circuit and power supply to constitute angle-to-capacitance conversion measuring circuit and angular displacement mechanical structure. The vibrator circuit 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 variable signal is processed to output corresponding pulse width modulation signal variable. The sensor has simple structure and high sensitivity.

Description

technical field [0001] The invention relates to a sensor, in particular to a variable pitch capacitive pulse width modulation 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 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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