光纤pH值测试系统的研究

Fibre-Optic pH Measurement System

光纤pH 值测试系统是利用比色指示剂对周围pH 值的变化而引起选定的可见光波段的衰减度变化,这个被调制的光信号以光纤作为传光解质,通过光电转换与微弱信号放大电路构成一个完整的pH 值测试系统。该系统为特殊条件下检测pH 值开辟了一条新的途径。

The fibre-optic pH measurement system utilizes a colorimetric indicator to sense the variation in the attenua- tion of specific reflected visible radiation bands caused by changes in pH.The modulated signal is transferred by fi- bre-optic and then transformed to electric signal which is amplified and indicated to form a pH measurement system. This system provides a new approach to measure pH under certain specific condition.