Ultrasonic measuring system, ultrasonic sensor and method for investigating an ultrasonic echo

摘要

An ultrasonic measuring system, an ultrasonic sensor (1) and a method for investigating an ultrasonic sensor are proposed. The method comprises the steps of transmitting an ultrasonic pulse based on a first signal, converting an ultrasonic echo into an electrical second signal, filtering the second signal using a filter which is matched to the second signal, correlating the first signal and the second signal, comparing a result of the correlation with a predefined reference, and from this determining a length of the ultrasonic echo. The system, comprising an ultrasonic transducer, an evaluation unit (3) for filtering and correlating, a signal output (5), and an electronic control device (4) with a signal input (7) for providing the results of the correlation to a processor (8), may be integrated within the bumper of a vehicle in order to determine a spatial extent of an environmental object.