摘要
三电极电导率传感器是用于海洋环境测量的重要仪器之一。三电极电导率传感器主要由三电极电导池和信号转换电路组成。主要论述高精度三电极电导率传感器测量电路的工作原理和实现方法,分别从振荡器、自动增益控制和抗干扰设计三个方面进行阐述。此外,为了实现传感器测量电路的高精度,还要对电路板进行温度补偿,消除整个线路器件带来的测量误差。最后选用自行研制的5#三电极电导率传感器与海鸟SBE49三电极电导率传感器进行比测实验。通过5#传感器与海鸟SBE49的比测数据可得,5#电导率传感器的重复性误差均在±0.003 mS/cm以内,说明电路的性能良好,可实现电导率传感器的高精度测量。
Three electrode conductivity sensor is one of the most important equipment for ocean environment measurement. It consists of three electrode conductivity cell and a signal conversion circuit. The work principle and realization method of high precision three electrode conductivity sensor measurement circuit were mainly discussed, including the oscillator, automatic gain control and anti- interference design three aspects. In addition, in order to achieve high-precision, temperature compensation was carried out on the circuit board to eliminate the measurement error caused by the entire circuit device. Finally the developed 5# three electrode conductivity sensor was compared with seabirds SBE49 conductivity sensor with three electrodes for experiment. It is known through the measured data between 5# sensor and seabirds SBE49, the repeatability error of 5# conductivity sensor are within ＋0.003 ms/em, that showed the circuit performance is good, can realize high precision measurement of conductivity sensor.
出处
《海洋技术》
北大核心
2013年第3期33-36,45,共5页
Ocean Technology
基金
海洋公益性行业科研专项资助项目(201005035)
关键词
三电极
电导率
传感器
文氏振荡器
抗干扰
there electrode
conductivity
sensor
venture oscillator
anti-jamming.
