【摘要】：通過理論分析激光語音檢測系統(tǒng),提出一種引入?yún)?shù)估計誤差的反正切解調(diào)補償算法,并建立了系統(tǒng)總諧波失真與關(guān)鍵參數(shù)及其誤差的定量數(shù)學關(guān)系式。文中用總諧波失真(THD)和無雜散動態(tài)范圍(SFDR)分別表征系統(tǒng)微振動信號解調(diào)效果和可以與大干擾信號(阻塞信號)相區(qū)別的最小信號值。實現(xiàn)了非接觸、遠距離、高靈敏度的微振動信號檢測。通過實驗和仿真均驗證了反正切補償算法的可行性。實驗結(jié)果表明:該系統(tǒng)可以檢測音頻范圍內(nèi)的微弱振動,在現(xiàn)有光學硬件平臺基礎(chǔ)上,利用文中提出的反正切補償算法,能在35 m范圍內(nèi)較好地還原語音信號。
[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.
【作者單位】： 中國科學院長春光學精密機械與物理研究所激光與物質(zhì)相互作用國家重點實驗室;中國科學院大學;中國石油天然氣股份有限公司管道長春輸油分公司;
【基金】：國家自然科學基金青年基金(61205143)
【分類號】：TN249
，

本文編號：2279158