GUIDE SENSOR DEVICE AND VEHICLE USING THE SAME

摘要

PURPOSE:To provide a guide sensor device which outputs a prescribed guide signal and ensures the stable traveling of a vehicle despite the variance of intensity caused in the magnetic field generated on the line set along a carrier path or despite the variance of length caused in the gap formed between the line and a magnetic sensor. CONSTITUTION:A pair of magnetic sensors 21A and 21B are set close to a guide line 5 which is laid along a traveling path and flows a sine wave current of high frequency. The magnetic intensity levels detected by both sensors 21A and 21B are added together and then controlled based on this addition value by a differential detector 22. Then the detector 22 outputs a guide signal (e) based on the difference between those controlled magnetic intensity levels. In such a constitution of a guide sensor device, the signal (e) is acquired when the current flowing on the line 5 is set at a prescribed level even though the magnetic intensity levels detected by the sensors 21A and 21B are changed by the variance of length of the gap formed between the line 5 and both sensors 21A and 21B respectively as well as by the change by current of the line 5.