HU Ji, QIN Hui-bin, ZHENG Liang. Vehicle detecting system based on geomagnetic field measurement[J]. 2008, 27(11): 84-86. DOI: 10.13873/j.1000-97872008.11.031.
Detecting circuit realization and data information processing method of anisotropic magnetoresistive(AMR)vehicle detecting system are presented.With measuring variations of the geomagnetic field
AMR sensor can detect the presence and driving direction of vehicle and display the disturbance of the geomagnetic field on a computer screen.Experimental results show system is highly sensitive to geomagnetic field disturbance with 2mV/V/Oe sensitivity and 0.05%FS linearity error.