Research And Realization Of Weak Signal Detection In Adapative Optical Current Transducer

In order to improve the Long-term operation stability of Adapative Optical Current Transducer(AOCT), this paper use the diamagnetic optical material on solenoid collecting magnetic optical sensor head and shorten the length of magneto-optical materials. The paper designed the DPS2812Mv2 signal processing system based on DPS2812 in the signal processing part of AOCT and acquired the DC characteristics by using an average of the whole cycle accumulation of the signal.The paper also realized the weak signal detection in severe noise current signal by using the digital locking amplifier so that AOCT detected the useful weak current signal from severe noise signal.The paper tested the detection system by using the simulation software Labview.According to the detection results,the method which this paper proposed can extract the dc characteristics accurately and detect the amplitude of AC signal.