采用智能温度补偿电路的分布式光纤喇曼温度传感器

An Intelligent Temperature Compensating Circuit for Distributed Optical Fiber Raman Temperature Sensor

采用一种智能温度补偿电路对雪崩光电二极管的反偏电压进行温度补偿,抵消环境温度对雪崩光电二极管的影响,从而大大降低了系统的温度漂移.采用该温度补偿电路的系统可在0℃到60℃的环境温度范围内将温漂引起的测量偏差控制在±0.1℃之内.和传统的恒温装置相比,采用该温度补偿电路可有效地降低系统的功耗和成本.相对采用热敏电阻的温度补偿电路,该温度补偿电路的温度补偿线性更好,补偿系数设置更灵活.

An intelligent temperature compensating circuit is used to compensate the avalanche photodiode reverse bias voltage for offsetting the impact of environmental temperature on the avalanche photodiode,thus reducing the temperature drift of the system.Using this technology,the system measurement error caused by ambient temperature drift can be controlled within ±0.1℃ from 0℃ to 60℃.Compared with traditional constant temperature devices,using temperature compensating circuit can effectively reduce system power consumption and cost.This circuit has better temperature compensation linear,and is more flexible for compensation coefficient setting than the circuit using thermistor.