and methods for determining environmental factors and for detecting a sensor position

摘要

The invention relates to a sensor and a method for detecting the position of the sensor with respect to a guide surface (5) comprising a housing (1) and an electronic analysis device (7), which provides measurement values for the guide surface position (5) based on measurement signals. the sensor comprises an ultrasonic transducer arrangement at each of the two outer ends of which a respective reference ultrasonic transducer is additionally mounted and a respective reflector surface (12) is mounted in alignment with the reference piezoelectric disc (13) to a distance from the underside (9), said ultrasonic transducers and reflector surfaces being inclined 45 ° from the underside (9) and facing each other, thereby forming a reference measurement path (r) having a known length between the two reference ultrasonic transducers. In the method for detecting relative position, measurement values are compensated for environmental influences by measurements on a reference path.