强信号全覆盖环境高精密传感器微弱信号调制设计  

Design of Weak Signal Modulation for High Precision Sensors in Strong Signal Full Coverage Environment

作　　者：张一 ZHANG Yi(Institute of Seismology,CEA,Wuhan 430000,China)

机构地区：[1]中国地震局地震研究所,武汉430000

出　　处：《自动化与仪表》2024年第7期105-109,共5页Automation & Instrumentation

摘　　要：在强信号的存在下,传感器微弱信号会被干扰、淹没或认为噪声,导致信号无法准确读取影响传感器的性能。为了解决这个问题,提出了一种强信号全覆盖环境高精密传感器微弱信号调制设计方法。该方法利用压缩感知技术重构完整的高精密传感器微弱信号集,通过自适应滤波器进行滤波以降低噪声,提高微弱信号的信噪比。利用基于正弦载波的扩频调制技术对微弱信号展开调制,将微弱信号扩展到宽频带中,以提高微弱信号的抗干扰能力和传输效率。实验结果表明,所提方法的信号重构精度高,能够有效滤除信号中的噪声,提高信号的抗噪声能力。并且信号调制性能好、抗干扰能力强。In the presence of a strong signal,the weak signal of the sensor will be interfered with,submerged or considered as noise,resulting in an inaccurate reading of the signal affecting the performance of the sensor.In order to solve this problem,a design method of weak signal modulation for high-precision sensor in strong signal full coverage environment is proposed.This method uses compressed sensing technology to reconstruct the complete weak signal set of high-precision sensor,and filters it by adaptive filter to reduce noise and improve the signal-to-noise ratio of weak signal.The spread spectrum modulation technique based on sinusoidal carrier is used to modulate the weak signal,and the weak signal is extended to the wide band to improve the anti-interference ability and transmission efficiency of the weak signal.The experimental results show that the proposed method has high signal reconstruction precision,can effectively filter the noise in the signal,and improve the anti-noise ability of the signal.And the signal modulation performance is good,strong anti-interference ability.

关 键 词：强信号全覆盖 高精密传感器 微弱信号 压缩感知 自适应滤波器 最小均方准则 扩频调制 正弦载波 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]