Vehicle Detecting Sensor Comprising Geomagnetic Sensor Apparatus which Eliminates Shielding Effect by Using Magnetic Biasing

摘要

geomagnetic sensor apparatus is disclosed removing the shielding effect by using a self- biasing. Geomagnetic sensor device of the present invention , by the outside of the ferromagnetic material is removed to access the geomagnetic sensor, or via a self- biasing method, the shielding effect that occurs as the geomagnetic sensor is located near , the performance of the geomagnetic sensor according to the shielding effect (e.g. , sensitivity ) it is possible to compensate for falling . For self- biasing the permanent magnets , as well as an electromagnet may also be used , care should be taken so that the external magnetic field around the geomagnetic sensor is not saturated by the magnetic bias . ;