激光语音检测系统反正切补偿算法
发布时间：2018-10-18 12:43
【摘要】：通过理论分析激光语音检测系统,提出一种引入参数估计误差的反正切解调补偿算法,并建立了系统总谐波失真与关键参数及其误差的定量数学关系式。文中用总谐波失真(THD)和无杂散动态范围(SFDR)分别表征系统微振动信号解调效果和可以与大干扰信号(阻塞信号)相区别的最小信号值。实现了非接触、远距离、高灵敏度的微振动信号检测。通过实验和仿真均验证了反正切补偿算法的可行性。实验结果表明:该系统可以检测音频范围内的微弱振动,在现有光学硬件平台基础上,利用文中提出的反正切补偿算法,能在35 m范围内较好地还原语音信号。
[Abstract]:Based on the theoretical analysis of the laser speech detection system, a compensation algorithm based on the parameter estimation error is proposed, and the quantitative mathematical relationship between the total harmonic distortion of the system and the key parameters and their errors is established. In this paper, total harmonic distortion (THD) and non-spurious dynamic range (SFDR) are used to characterize the demodulation effect of the system micro-vibration signal and the minimum signal value which can be distinguished from the large interference signal (blocking signal), respectively. Non-contact, long-distance and high sensitivity micro-vibration signal detection is realized. The feasibility of the algorithm is verified by experiments and simulations. The experimental results show that the system can detect the weak vibration in the audio frequency range. On the basis of the existing optical hardware platform and using the algorithm of the inverse tangent compensation proposed in this paper, the speech signal can be restored well in the range of 35 m.
【作者单位】： 中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室;中国科学院大学;中国石油天然气股份有限公司管道长春输油分公司;
【基金】：国家自然科学基金青年基金(61205143)
【分类号】：TN249
，
本文编号：2279158
[Abstract]:Based on the theoretical analysis of the laser speech detection system, a compensation algorithm based on the parameter estimation error is proposed, and the quantitative mathematical relationship between the total harmonic distortion of the system and the key parameters and their errors is established. In this paper, total harmonic distortion (THD) and non-spurious dynamic range (SFDR) are used to characterize the demodulation effect of the system micro-vibration signal and the minimum signal value which can be distinguished from the large interference signal (blocking signal), respectively. Non-contact, long-distance and high sensitivity micro-vibration signal detection is realized. The feasibility of the algorithm is verified by experiments and simulations. The experimental results show that the system can detect the weak vibration in the audio frequency range. On the basis of the existing optical hardware platform and using the algorithm of the inverse tangent compensation proposed in this paper, the speech signal can be restored well in the range of 35 m.
【作者单位】： 中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室;中国科学院大学;中国石油天然气股份有限公司管道长春输油分公司;
【基金】：国家自然科学基金青年基金(61205143)
【分类号】：TN249
，
本文编号：2279158
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