一种基于残周期拟合的激光测冲击信号解调方法

doi:10.3969/j.issn.1000-1158.2021.04.15

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Abstract Aiming at the FM signal demodulation in impulse acceleration by using laser interference methods, a novel demodulation method are introduced. It is based on the partial sinusoidal period series curve-fitting, by using about 1/5 period sine wave models moving and curve-fitting, the 4 sine wave parameters are gotten, and the FM demodulation be realized. To the impulse laser interference Doppler signals, it has an excellent adaptability, there is no need curve cutting operation, filtering, and so on, the demodulation resolution is one sampling period, and it has well stability. In experiment, the validity and feasibility are proved, and it must be a novel processing method of impulse acceleration signals by using laser interference methods. The method above can also be used in demodulation of vibration wave form of laser interference Doppler signals.

Key words： metrology impulse acceleration partial period sine wave curve-fitting frequency modulation demodulation calibration

Received: 20 December 2019 Published: 20 April 2021

PACS:	TB936
	TB973

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	LIANG Zhi-guo

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LIANG Zhi-guo. A Novel Demodulation Method Based on Partial Period Curve-fitting for FM Signal in Impulse Acceleration Calibration by Using Laser Interference Methods[J]. Acta Metrologica Sinica, 2021, 42(4): 503-510.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.04.15 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I4/503

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