CAJ | 학술논문

为了提高系统的集成度,降低测量成本,用 LabVIEW 软件代替测量系统中的硬件锁相放大器,进而实现超光滑光学表面光散射参数的高性价比的准确测量.设计一种用于检测微弱散射光信号的测量系统,该测量系统由光路、光电探测、数据采集与控制、相关检测算法软件等部分组成.在分析测量系统原理的基础上,研究基于 LabVIEW软件平台的锁相算法,提出在微弱光电信号检测中利用软件实现锁相检测的技术,并对其进行仿真实验分析.结果表明:当被测信号频率为0.2 kHz,幅值为1.0 V,噪声幅值为0.5 V 时,测量误差为0.1%;证明该方法可有效实现对被调制微弱光电信号的检测.
위료제고계통적집성도,강저측량성본,용 LabVIEW 연건대체측량계통중적경건쇄상방대기,진이실현초광활광학표면광산사삼수적고성개비적준학측량.설계일충용우검측미약산사광신호적측량계통,해측량계통유광로、광전탐측、수거채집여공제、상관검측산법연건등부분조성.재분석측량계통원리적기출상,연구기우 LabVIEW연건평태적쇄상산법,제출재미약광전신호검측중이용연건실현쇄상검측적기술,병대기진행방진실험분석.결과표명:당피측신호빈솔위0.2 kHz,폭치위1.0 V,조성폭치위0.5 V 시,측량오차위0.1%;증명해방법가유효실현대피조제미약광전신호적검측.
In order to improve the integrated level of system and reduce the cost of measure, a high cost-effective and accurate measurement for the light scattering parameters of the super smooth optical surface is realized by using LabVIEW software to replace the hardware lock-in amplifier of measuring system. A photoelectric check system used for measuring light scattering are designed, the system is made up of light path, photoelectric detector, data acquisition and control system, the software for correlation detection algorithm etc. On that basis, the phase lock algorithm based on LabVIEW software platform is studied mainly in this paper. The technique for phase locked detection realized by software in the weak photoelectric signal detection is raised, and the technique is simulated. When measured signal frequency is 0.2 kHz, amplitude is 1.0 V and the noise amplitude is 0.5 V, the measurement error is 0.1%. The simulation result shows that the detection for the modulated weak photoelectric signal can be realized effectively by this method.