大动态信号的高分辨采集电路设计方法  

High-Resolution Acquisition Design Method for Large Dynamic Signals

作　　者：邵亚璐 王鉴[1,2] 庞存锁 韩焱[1,2] SHAO Yalu;WANG Jian;PANG Cunsuo;HAN Yan(Shanxi Key Lab of Signal Capturing and Processing,North University of China,Taiyuan Shanxi 030051,China;State Key Laboratory of Dynamic Testing Technology,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中北大学信息探测与处理山西省重点实验室,山西太原030051 [2]省部共建动态测试技术国家重点实验室,山西太原030051

出　　处：《传感技术学报》2022年第2期148-153,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然基金青年科学基金(61901419)。

摘　　要：针对在数字采集中,受ADC的量化分辨力限制,大动态范围信号难以满足信号分辨力的要求的问题,提出了一种适应大动态范围信号高分辨力采集电路系统的设计方法。首先根据信号的动态范围、分辨力指标和关注度,将信号进行逆序分段放大到ADC的输入动态范围,之后,根据各分段采集到的不同分辨力数据,进行数据加权合成,实现大动态范围信号的分段高分辨实时采集。仿真实验验证表明,此方法既可满足大动态范围信号的高分辨采集,同时可根据不同段信号的关注度,实现特定的分辨力采集,且误差率低于3%。In the digital acquisition,limited by the quantization resolution of ADC,the large dynamic range signal is difficult to meet the signal resolution requirements,this paper proposes a design method to adapt to the large dynamic range signal high resolution acquisition circuit system.This method first amplifies the signal to the input dynamic range of ADC in reverse order according to the dynamic range,resolution index and degree of attention of the signal.Then,according to the different resolution data collected in each segment,the data is weighted and synthesized to achieve Segmented high-resolution real-time acquisition of large dynamic range signals.Simulation experiments show that the method in this paper can not only meet the high-resolution acquisition of large dynamic range signals,but also achieve specific resolution acquisition according to the attention of different segments of the signal,and the error value is less than 3%of the minimum resolution.

关 键 词：信号采集处理 分段放大 高分辨采集 关注度 大动态范围 

分 类 号：TN433[电子电信—微电子学与固体电子学]