| 摘要 |
<p>The device (100) has a sensor unit (10) determining displacement of objects from a time difference between a start signal and an echo signal, which is derived from an echo pulse (30). An optical path of a reference pulse (36) to a detector (20) is shorter or longer than an optical path of a measuring pulse (15) to the detector. The detector changes quantitative detection of the echo and reference pulses. A controllable pulse attenuator (50) is located in the optical path of the echo pulse for attenuating the echo pulse to compare the echo pulse with the reference pulse. An independent claim is also included for a method for optoelectronic contactless distance measurement according to transit-time principle.</p> |
