【摘要】 针对国产的磁力仪功耗大,稳定性较差,精度较低(±1 nT)的问题,采用超低功耗单片机MSP430F149,设计了基于MSP430的质子旋进式磁力仪。给出了质子旋进磁力仪的工作原理及系统的硬件框图,对质子旋进信号的配谐和放大作出了说明,设计了对信号分频测量其周期的高精度间接测磁方法,指出了单片机软件开发的要点。与CZM-2型质子旋进式磁力仪相比,该设计功耗低,稳定性强,精度较高,野外实测待机电流0.8 mA,最大误差0.5 nT。更多还原

【Abstract】 The principle of proton precession magnetometer is recommend,and the characters of MSP430 low power-consumption MCU(Micro Control Unit) are mentioned.The hardware structure of the apparatus is given,how to make resonance of the proton precession signal and the method of amplification are showed.The method of high-precision magnetic field measurement based on frequency division and periods measurement is designed.The practical results from magnetometer indicate that the Power-down current is 0.8 mA and the max offset error is 0.5 nT.更多还原