标题：Research on the detection system of liquid concentration base on birefringence light transmission method
作者：Li Tianze; Zhang Xia; Hou Luan; Jiang Chuan
作者机构：[Li Tianze; Zhang Xia; Hou Luan; Jiang Chuan] Shandong Univ Technol, Sch Elect & Elect Engn, Shandong Zibo 255049, Peoples R China.
会议名称：5th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Optical Test and Measurement Technology and Equipment
会议日期：APR 26-29, 2010
来源：5TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: OPTICAL TEST AND MEASUREMENT TECHNOLOGY AND EQUIPMENT
关键词：semiconductor optical position sensitive detector (Psd); fiber optic;; semiconductor laser; concentration of liquid
摘要：The characteristics of the beam transmitting in the optical fiber and the liquid medium are analyzed in this paper. On this basis, a new type of semiconductor optical position sensitive detector is used for a receiving device, a light transmission method of birefringence is presented, and a set of opto-electrical detection system which is applied to detect liquid concentration is designed. The system is mainly composed of semiconductor lasers, optical systems, Psd signal conditioning circuit, Single-chip System, A/D conversion circuit and display circuit. Through theoretical analysis and experimental simulations, the accuracy of this system has been verified. Some main factors affecting the test results are analyzed detailedly in this paper. The experiments show that the temperature drift and the light intensity have a very small impact on this system. The system has some advantages, such as the simple structure, high sensitivity, good stability, fast response time, high degree of automation, and so on. It also can achieve the real-time detection of liquid concentration conveniently and accurately. The system can be widely applied in chemical, food, pharmacy and many other industries. It has broad prospects of application.