摘要
以提升声信号检测精度与检测系统时空性能为目的,提出了基于单片机技术的脉冲激光声信号检测系统。系统在单片机控制下,光电探测器采集携带声信号信息的脉冲激光信号,并将其转变为微弱的电信号,传输至前置放大器内;前置放大器放大微弱的电信号后,信号进入高通滤波器内消除信号含带的噪声;利用后置放大器放大去噪信号,使其满足数模转换器所需幅度要求;利用可调陷波器抑制工频干扰。应用分析结果显示该系统能够有效提升时域信号与频域信号的检测质量;不同频率声信号检测的平均时间短,单秒存储空间小。
In order to improve the accuracy of acoustic signal detection and the space-time performance of the de-tection system,a pulse laser acoustic signal detection system based on MCU technology is proposed.Under the control of single chip microcomputer,the photoelectric detector collects the pulse laser signal with acoustic signal information,and converts it into weak electrical signal and transmits it to the preamplifier;after the preamplifier amplifies the weak electrical signal,the signal enters the high pass filter to eliminate the noise of the signal band;the post amplifier is used to amplify the de-noising signal to meet the amplitude required by the digital to analog converter Using adjustable notch filter to suppress power frequency interference.The application analysis results show that the system can effec-tively improve the detection quality of time-domain signal and frequency-domain signal;the average detection time of acoustic signal with different frequencies is short,and the storage space per second is small.
作者
王俊
谭荣华
WANG Jun;TAN Ronghua(Yuzhang Normal University,Nanchang 330103,China)
出处
《激光杂志》
CAS
北大核心
2021年第8期88-92,共5页
Laser Journal
基金
江西省教育厅科学技术研究项目(No.GJJ171192)
江西省教改课题(No.JXJG-17-43-11)。
关键词
单片机
脉冲激光
声信号检测
信号采集
滤波器
放大器
single chip microcomputer
pulse laser
acoustic signal detection
signal acquisition
filter
amplifier
