摘要 |
A position sensor is provided comprising a coil ( 1 ) and an electric conductor ( 2 ) or magnetic ( 3 ) both arranged so that the size of their overlapping area (p) is varied as the position of an object to be examined changes, a resistor ( 6 ), a capacitor ( 4 ), a comparator ( 5 ) of an inverse output type, and a timing circuit ( 50 a) arranged for uniformly restraining the period (T) of a continuous oscillating motion, herein a displacement of the object to be examined is detected as a change in the time duration (t) which extends from the leading end of the period (T) to a time when the output of the comparator ( 5 ) is turned to a high level as timed with substantially the trailing end of the period (T). The resistance of the resistor ( 6 ) is determined so that a change in the time duration (t) remains minimum when the resistance of the resistor ( 6 ) is varied and when the temperature is at a predetermined degree. As the result, the linearity of the output can be improved over variation of both the temperature and the position.
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