水质检测仪器中溶解氧参数计算与设计

摘要

水质检测项目繁多，不同的应用领域所关注的水质项目不同。在多参数水质智能检测仪系统设计中，以溶解氧、酸碱度、钠离子含量、电导率和浊度五种参数作为检测对象。在分析溶解氧参数的检测原理，检测过程和计算方法的基础上，采用极谱型传感器，选用MAX873基准电压源组成激励电压源，由于溶解氧传感器输出的是微弱电流，采用静电计放大器实现电流－电压的转换。%Water quality projects of concern to different ifelds of application. In the design of multi-parameter water intelligent detecting system, with dissolved oxygen, pH, sodium ion content, electrical conductivity and turbidity parameter as testing object. Dissolved oxygen parameters measuring principle and calculation method on the basis of the detection process using MAX873 polarographic sensor, reference voltage excitation voltage, due to the dissolved oxygen sensor is weak current, with an electrometer ampliifers achieve current-voltage conversion.