Resonance type optical fiber peg-top signal detection method and device based on coordinate rotation digital computer algorithm

A technology of coordinate rotation and fiber optic gyroscope, which can be used in measurement devices, calculations, electrical and digital data processing, etc., and can solve the problem that multiplication is not easy to implement
CN101149264AInactive Publication Date: 2008-03-26ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2008-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a resonant fibre-optic gyro signal detection method and device based on the coordinate rotary digital computer algorithm. The detection method includes the modulation signal production and the signal demodulation method, which are all reached by the phase bit / scope switch module based on the coordinate rotary digital computer algorithm. The detection device includes the laser, the coupler, the phase bit modulator, the fibre-optic ringer, the photoelectrical detector, the present programme array chip, the digital / module switcher, the sample collecting channel, the reactive circuit and the signal output channel. The invention can reach the two circuits of the modulation signal production, demodulation and treatment by using the coordinate rotary digital computer algorithm; the scope, phase bit and frequency is dispatched by the programme, which is benefit for the detection system stable and assembly; the algorithm is determined by the iterative times and data word length; the fibre-optic ringer can avoid the light wave in fibre-optic back to the laser and influence the laser stable.
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Description

technical field

[0001] The invention relates to a resonant optical fiber gyroscope signal detection method and device based on a coordinate rotation digital computer algorithm. Background technique

[0002] Resonator Fiber Optic Gyro (R-FOG) is a high-precision inertial sensor device that uses the optical Sagnac effect to detect rotation. Because the Sagnac effect is a very weak effect, the signal modulation and detection technology in the system has a very important position. The commonly used detection circuit is composed of a modulation signal generator and an analog demodulation signal. Compared with the analog detection system, the digital detection system has high stability and flexible design, and can effectively suppress drift noise caused by 1 / f noise and temperature.

[0003] The key of Direct Digital Frequency Synthesis (Direct Digital Frequency Synthesis, DDS) technology is the phase / amplitude conversion part, commonly used methods include memory (Read-Only Mem...

Claims

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