| 摘要 |
<p>PURPOSE:To obtain a stable output which is not influenced by a temperature characteristic of a detection coil by providing a set of an excitation coil and three pieces of detection coils on a magnetic detecting part, and inferring and outputting the steering amount of an unmanned carrying car, based on two differential outputs obtained by a fuzzy inference device. CONSTITUTION:A magnetic detecting part 1 is provided with a set of an excitation coil and three pieces of detection coils 3 - 5, and three pieces of detection coils 3 - 5 are provided in the vicinity of both end magnetic poles and in the vicinity of the center of the excitation coil so that an induced voltage of almost the same level is generated in the direction in which a magnetic field of the excitation coil is not received strongly. Differentiating circuits 6 - 8 differentiate separately detection outputs of three pieces of detection coils 3 - 5, and differential circuits 9, 10 obtain a differential output of a differentiation output of the output received by the detection coil of the center part and a differentiation output of the outputs received by the detection coils 4, 5 of both end parts, respectively. Also, a fuzzy inference device 11 infers the steering amount (u) of an unmanned carrying car, based on two obtained differential outputs, and outputs its steering amount (u). In such a way, the guidance sensor which is not influenced by a temperature variation can be obtained.</p> |
