Optoelectronic sensor and method for measuring distance in accordance with the light-crossing time principle

摘要

The sensor has a light transmitter e.g. LED, to transmit light signals, and a light receiver to receive reflected receiving signals. A field programmable gate array (18) fulfils a transition condition for the receiving signal by systematic selection of transmission delay time for sending of the light signals at a monitoring time point. The array calculates a light crossing time from the delay time. A controller/agent tracks the delay time such that the transition condition in the time point is fulfilled. A filter is provided between the light receiver and the array. An independent claim is also included for a method for measuring the distance.