激光多普勒測(cè)振計(jì)信號(hào)采集和處理系統(tǒng)設(shè)計(jì)

王晶晶,尚建華,賀　巖,羅　遠(yuǎn)

(1.東華大學(xué) 信息科學(xué)與技術(shù)學(xué)院,上海　201620;2.中國(guó)科學(xué)院 上海光學(xué)精密機(jī)械研究所空間激光信息技術(shù)研究中心,上海　201800)

激光多普勒測(cè)振計(jì)信號(hào)采集和處理系統(tǒng)設(shè)計(jì)

王晶晶1,尚建華1,賀巖2,羅遠(yuǎn)2

(1.東華大學(xué) 信息科學(xué)與技術(shù)學(xué)院,上海201620;2.中國(guó)科學(xué)院 上海光學(xué)精密機(jī)械研究所空間激光信息技術(shù)研究中心,上海201800)

摘要為實(shí)現(xiàn)激光-水聲淺海地形遙感探測(cè)中,激光多普勒測(cè)振計(jì)的數(shù)據(jù)采集和處理,解決數(shù)據(jù)采集處理中采樣率低、人機(jī)界面操作不便、在線處理不及時(shí)、采樣通道數(shù)目少等問題,設(shè)計(jì)了一種可視化的信號(hào)采集和處理系統(tǒng)。借助VC++編程技術(shù),對(duì)PCI5616數(shù)據(jù)采集卡進(jìn)行了二次開發(fā),實(shí)現(xiàn)了激光多普勒測(cè)振計(jì)輸出信號(hào)的采集、實(shí)時(shí)顯示、保存以及在線處理。實(shí)驗(yàn)表明,該信號(hào)采集處理系統(tǒng)能滿足實(shí)際水面測(cè)量的工作需求,有效實(shí)現(xiàn)了激光多普勒測(cè)振計(jì)輸出信號(hào)的實(shí)時(shí)采集與處理,并具有操作靈活、實(shí)時(shí)性強(qiáng)、集成度高等特點(diǎn)。

關(guān)鍵詞激光多普勒測(cè)振計(jì);信號(hào)采集;在線處理;PCI5616數(shù)據(jù)采集卡;消息機(jī)制

Design of Signal Acquisition and Processing System for Laser Doppler Vibrometer

WANG Jingjing1,SHANG Jianhua1,HE Yan2,LUO Yuan2

(1.College of Information Science and Technology,Donghua University,Shanghai 201620,China;

2.Research Center of Space Laser Information Technology,Shanghai Institute of Optics and Fine Mechanics,

Chinese Academy of Science,Shanghai 201800,China)

AbstractA visual data acquisition and processing system is presented to satisfy the signal processing specification of the laser Doppler vibrometer (LDV) working for the optic-acoustic remote sensing of the shallow terrain and to resolve the questions of low sampling rate,inconvenient man-machine interface and the less number of channels for sampling.VC++ is employed in the post-development of PCI5616 to achieve real-time display,acquisition,storage,and real-time data-processing of the signals.With good processing capacity,flexible operation,good real-time performance and high integration,this data acquisition and processing system realizes the real-time acquisition and processing of the output signals of LDV and meets the demand of topographic mapping under the hydrodynamic water surface.

Keywordslaser Doppler vibrometer;data acquisition;real-time process;PCI5616;messages mechanism

由于淺海大部分區(qū)域的水深均在百米以內(nèi),且渾濁度普遍較高,傳統(tǒng)的海洋遙感系統(tǒng)通常以母船或者拖曳體為載體,并采用聲波探測(cè)技術(shù)實(shí)施測(cè)量,其機(jī)動(dòng)性和靈活性有限,因而難以完成大范圍、快速、高效的動(dòng)態(tài)環(huán)境測(cè)量。較傳統(tǒng)的聲波探測(cè)技術(shù)而言,借助水面實(shí)現(xiàn)光聲信息轉(zhuǎn)換的聲-光耦合技術(shù),突破了傳統(tǒng)激光遙感的探測(cè)局限,使得基于空中平臺(tái)的測(cè)量技術(shù)具備一定的海水深度穿透能力,進(jìn)而為航空遙感水下環(huán)境提供了一條新的技術(shù)路線[1]。……