发明名称 |
ALL-FIBER INTERFEROMETRIC FIBER OPTIC GYROSCOPE FOR INHIBITING ZERO DRIFT |
摘要 |
A method for inhibiting zero drift of an all-fiber interferometric fiber optic gyroscope and a corresponding all-fiber interferometric fiber optic gyroscope are disclosed. The method comprises: reversing the polarity of an AC voltage applied to a PZT piezoelectric ceramic phase modulator according to a predetermined half-cycle time period, and making half of the difference between output rotation rates of the gyroscope in two adjacent half-cycle time periods as the output rotation rate of the gyroscope in a cycle. A phase reversal switch and a DSP chip are added to the all-fiber interferometric fiber optic gyroscope. The phase reversal switch is used for controlling the polarity of the AC voltage, and the DSP chip is used for outputting a square wave signal to control the phase reversal switch and for calculating the output rotation rate of the gyroscope according to the output signal of a demodulation/amplifier circuit. |
申请公布号 |
US2012092676(A1) |
申请公布日期 |
2012.04.19 |
申请号 |
US201113042370 |
申请日期 |
2011.03.07 |
申请人 |
WANG XINYUE;HE CHANGHONG;WANG ZIYU;PEKING UNIVERSITY |
发明人 |
WANG XINYUE;HE CHANGHONG;WANG ZIYU |
分类号 |
G01C19/72 |
主分类号 |
G01C19/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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