磁通门传感器

吉林大学本科毕业论文（设计）The Design of Geomagnetic Field Detection Device Basedon Three-component Fluxgate SensorsAbstratThe three-component fluxgate geoamagnetic field detection device is a kind ofvector detection device which can measure the geoamagnetic fielddirectly.Compared with other instruments which can measure geomagneticfield,the fluxgate sensor has the virtue of small size,light weight,low powerconsumption and good economy,is used widely in different fields.This paper introduces the working principle of the fluxgate sensor and thedigital demodulation method in detail.The design of hardware circuit of thethree-component fluxgate geomagnetic field detection device and progammingof MCU are also introduced in this paper.The detection device consists ofthree-component fluxgate sensors,MCU system,A/D data acquisition circuitand com port communication circuit.The magnetic vector is detected by thethree-component fluxgate sensors,signals output from the senors are processedby active filters and amplifiers.Then there are three sinusoidal signals,whoseamplitude are proportional to the magnitude of geomagnetic field component.The A/D convertor produces 4 points sampling signals,and transmits data oftwo cycles to CPU,then CPU send the data to computer via the com port.Finally,the data is processed and analyzed by computer.Keywordsthree componentsgeomagnetic field Digital demodulationData AcquisitionCom Port