A high-precision magnetic parameters test instrument is designed.The instrument uses TMS320F2812 as processor and 12 bit serial A / D TLC2588 is used for data acquisition.Compound Newton-Cotes digital integration algorithm is used to quickly obtain flux value

it can not only solve zero drift problems brought by analog integrator

but also improves precision of integration.IIR digital filtering and self-correcting and compensation of system zero point are achieved by software.Meanwhile

through digital voltage-controlled constant current source and switching power supply technology to realize demagnetization.Compared with traditional magnetic parameters test instrument

the instrument has some advantages

such as high test precision

good data repeatability and stable performance.