The Measurement about the Relative Displacement Vector of the Earth's Magnetic Field

This The article proposes a new approach of measuring the object's relative displacement vector on the earth's surface and develops measuring circuit and data processing circuit. We use three magnetic sensors which are mutually vertical and dedicated chip PNI11096 to measure. The three magnetic sensors all have their respective magnetic circuit and temperature-compensation circuit and the anti-interference circuit. PNI11096 opens data register for magnetic sensor. Under the control of PNI11096, the three magnetic sensors measure the three mutually perpendicular component data of X, Y, Z. And then the sensors convey results to SCM by SPI interface. System storages the earth's magnetic field intensity data of the departure A0 and the destination A1 while measuring. So get the changes of the earth's magnetic flux density. Therefore, we can calculate the object's relative displacement vector. The article analyses the interference factors in the measurement process and the corresponding disposal methods. Finally, the paper describes the technology's applicate prospect.