Sensor and method for monitoring the distance of a boundary area

摘要

The sensor has a transmitter and a receiver for transmitting and receiving a microwave signal. A controller determines distance of a boundary area based on operating time of signals reflected at the boundary area. The controller repeatedly transmits signal for obtaining a time-extended single receiving signal. The controller selects temporal shift with each repetition corresponding to a table or calculation specification so that a computation rule of support points (1-6), which are specified by a sampling time point, of the receiving signals are arbitrarily predefined. An independent claim is also included for a method for measuring a distance of a boundary area based on operating time of signals reflected at the boundary area.