Angular-rate sensing system by detecting Coriolis vibration by aid of non-contact optical fiber combinations
An angular rate sensor and detection system technology, applied in devices using optical methods, measuring devices, utilizing wave/particle radiation, etc., can solve the problems of limited application fields, large size, and high production costs of fiber optic gyroscopes or laser gyroscopes, reaching The effect of reducing production costs, high detection sensitivity, and improving measurement accuracy and sensitivity
Inactive Publication Date: 2012-12-05
CHONGQING UNIV OF POSTS & TELECOMM
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[0006] Fiber optic gyroscope (FOG) or laser gyroscope has higher measurement accuracy and better measurement sensitivity, and has achieved good application in the military field. However, due to the high production cost and large volume of fiber optic gyroscope or laser Its field of application is limited
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[0040]The angular rate sensing system that uses a non-contact optical fiber group to detect Coriolis vibration includes a drive system, a vibration structure system, and an optical fiber group detection system. The vibration structure system includes a vibrating beam 100; the optical fiber group detection system includes a light source 95 and three pairs of detection optical fiber combinations. 1011, 1012, 1013, 1014, 1015, 1016, optical isolator 96, first-stage Y-type optical coupler 97, second-stage Y-type optical coupler 981, 982, photoelectric detection device 94 and photoelectric processing system 99;
[0041] Such as Figure 6 The first, third and fifth detection fiber combinations 1011, 1013, 1015 are arranged on one side of the vibration beam 100 along the length direction of the vibration beam 100, and the second, fourth and sixth detection fiber combinations 1012, 1014 and 1016 are arranged along the vibration beam 100. Beam 100 lengthwise direction is arranged on th...
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The invention relates to the technical field of miniature measuring instruments, in particular to an angular-rate sensing system by detecting Coriolis vibration by the aid of non-contact optical fiber combinations. The angular-rate sensing system comprises a driving system, a vibrating structure system and an optical fiber group detecting system. The optical fiber combination detecting system comprises a light source, at least three pairs of detecting optical fiber combinations, an optical isolator, a primary Y-shaped optical coupler, secondary Y-shaped optical couplers, a photoelectric detecting device and a photoelectric processing system. Angular rate is detected by detecting vibration amplitude of a sensitive surface of a vibrating beam in a double-light interference manner according to the Coriolis principle. In addition, as angular rate sensing is realized by detecting the Coriolis vibration by the aid of the non-contact optical fiber combinations, the optics and the mechanical vibration are combined, electromagnetic interference resistance is good, and measurement errors caused by a contact type detection method are avoided. Besides, optical fiber detection is insensitive to temperature, so that detection precision and detection sensitivity are high, production cost of an angular-rate sensor is lowered, and the size of the angular-rate sensor is reduced.
Description
technical field [0001] The invention relates to the technical field of miniature measuring instruments, in particular to an angular rate sensor system for detecting Coriolis vibrations using a non-contact optical fiber group. [0002] Background technique [0003] Angular rate sensor is an inertial measurement device that detects angular rate, and is widely used in military, commercial and other fields. For angular rate sensors, vibrating gyroscopes are widely used. The detection methods of vibrating gyroscopes are mainly piezoelectric detection, capacitive detection and electromagnetic detection. Most of the applications of these detection methods are limited by the output. Problems such as high impedance, poor load capacity, and large influence of parasitic capacitance. [0004] For the piezoelectric detection method, the electromechanical coupling coefficient of the piezoelectric material restricts the output power of the piezoelectric vibrator, thereby affecting the s...
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IPC IPC(8): G01P3/36G01H9/00
Inventor 刘宇刘申路永乐刘聪肖力敏欧毅冉贞东王仕亮陈燕苹
Owner CHONGQING UNIV OF POSTS & TELECOMM