The Open Automation and Control Systems Journal

2015, 7 : 2195-2200
Published online 2015 November 3. DOI: 10.2174/1874444301507012195
Publisher ID: TOAUTOCJ-7-2195

Fiber Optic Temperature Sensor Design based on Fluorescent Lifetime

Pinwei Zhu , Linkai Chen and Yinsheng Luo
Department of Electrical Engineering, Jiangsu University of Technology, Changzhou, Jiangsu, 213001, China.

ABSTRACT

The temperature is measured by the fluorescent lifetime of fluorescent material. In this work, the analog switch was controlled by single chip to trigger exciting light emission of LED. In order to measure the fluorescent lifetime, photoelectric detector, amplifier and active power filter were used. The modulation frequency of fluorescent signal was detected by phase locking detection method. Therefore, the temperature measurement in the range of 0°C..450°C was realized. This sensor has advantages such as high accuracy, strong anti-electromagnetic interference and non-contact measurement.

Keywords:

Fluorescent lifetime, phase locking detection, temperature sensor.