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

Inactive Publication Date: 2008-03-26
ZHEJIANG UNIV
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Problems solved by technology

The Taylor series method is not easy to implement in FPGA due to the use of a large number of multiplication operations

Method used

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

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Embodiment Construction

[0030] As shown in Figure 1, the laser 1 and the first coupler 3, the first phase modulator 4, the first fiber circulator 16, and the second coupler 20 in the signal detection device of the resonant fiber optic gyroscope based on the coordinate rotation digital computer algorithm , the second optical fiber circulator 19, the second phase modulator 7, and the first coupler 3 are connected; the first phase modulator 4 is connected with the first digital / analog converter 5; the second phase modulator 7 is connected with the second The digital / analog converter 6 is connected; the first optical fiber circulator 16 is connected with the first photodetector 17, the first signal sampling channel 14, the first analog / digital converter 11; the second optical fiber circulator 19 is connected with the second The photodetector 18, the second signal sampling channel 15, and the second analog / digital converter 12 are connected; the second coupler 20 is connected with the fiber resonant ring 2...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72G01C25/00G02F1/00G02F2/00G06F7/544
Inventor 杨志怀马慧莲金仲和
Owner ZHEJIANG UNIV
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