| 摘要 |
A distance-measuring apparatus includes a diode projecting pulses of light toward an object at a distance to be measured, a photoreceptor for receiving reflected pulses of light reflected from the object, an arithmetic unit outputting a ratio signal according to the distance, an integrator integrating the ratio signal by discharging an integrating capacitor to produce a first integral, charging the integrating capacitor with constant current to produce a second integral, a maximum second integral time selector for selecting a maximum of the second integration times, and a detector for determining the distance based on the signal output by the integrator after the lapse of the maximum second integration time.
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