Patent ID: 8013752
Filing Date: 2011-09-06
Classification: G01S

Abstract:
1. A sensor comprising: a sensing element to generate output signals corresponding to receiving signals received from an object; and an evaluation unit coupled to the sensing element and weighting the output signals from the sensing element with at least one switching threshold to generate object detection signals, the evaluation unit including a key configured to selectively reset the at least one switching threshold to higher and lower values through differences in activation of the key, wherein the differences in activation of the key are a function of activation time period of the key, wherein at least first and second different time windows are specified in the evaluation unit, and the at least one switching threshold is reset to higher values if the activation time period of the key falls into the first time window, and the at least one switching threshold is reset to lower values if the activation time period of the key falls into the second time window.