电磁浓度计发送器的改进

Improvement of Transducer of Electrodeless Concentration Measurement Instrument

对测量液体电导和浓度的传感器作了两项改进。传感器采用液体耦合的初级和次级变压器线圈。初级变压器由方波振荡器激励,以增加稳定性;次级变压器馈入零输入阻抗放大器,以消除磁力线引起的铁芯中磁导率的变化。

This paper describes two improvements of the transducer for measuring fluid conductance or concentration. The transducer employs fluid-coupled primary and secondary transformer windings. The primary transformer is energized by a square-wave oscillator for enhancing stability. The secondary transformer is feeded into a zero-input-impedance amplifier for eliminating any flux-induced permeability changes in cores.