【摘要】 本文叙述了光纤pH计研究工作中的两点进展。(1)传感器部份:以固化了的染料为指示剂,用光纤束监视pH。指示剂由苯酚红、聚丙烯酰胺与聚苯乙烯小球共价结合制成,而后将生长在微孔玻璃瓷片中的丝状指示剂装配在一对传光束的末端。这样就成功地克服了探头堵塞问题及在125℃温度、253 312Pa(2.5大气压)发酵过程中的难题。(2)色度法:采用红、绿、蓝三基色光电传感器将来自输出光纤束的光信号转换成R、G、B三个电信号,经微机处理显示于屏幕上。令人感兴趣的是R、G、B的波长及彼此间相对比值而不是它们的振幅。因此仪表具有较高的稳定性。本仪表的pH测量范围,发酵用,为6.0～9.0pH值,精度优于0.05pH值,时响2分钟。更多还原

【Abstract】 Optocliemical sensor has been stressed domestically and internationally in recent 10 years. The real-time test and control to pH values is very significant to biochemistry, biomedicine and environment protection. The writers of this paper has finished 2 research projects such as basic features of optical pH sensor and sample of pH meter. It can be applied to test of ferment industry and realizes computer real-time supervision.更多还原