Abstandsmessvorrichtung

摘要

A code generating device operates for generating a pseudo random noise code having a sequence of a predetermined number of chips each being in one of first and second logic states different from one another. A code monitoring device operates for detecting at least a preset number of successive chips in the first logic state in the pseudo random noise, and for changing at least one among the detected preset number of successive chips to the second logic state to convert the pseudo random noise code into a transmission signal. A driving device operates for activating and deactivating an electromagnetic wave generating device in response to the transmission signal. A receiving device operates for receiving an echo wave caused by reflection of an electromagnetic wave generated by the electromagnetic wave generating device at an object. A distance to the object is detected on the basis of the received echo wave.