Patent ID: 6191845
Filing Date: 2001-02-20
Classification: G01C,G01S

Abstract:
A distance measuring apparatus for measuring the distance to an object using a laser beam, comprising:laser beam emitting means for emitting a laser beam;light receiving means comprising at least one light receiving device for receiving the laser beam reflected by the object;control means for controlling said laser beam emitting means to emit the laser beam, and controlling said light receiving means to receive the laser beam reflected by the object during a first period of time and to receive the laser beam reflected by the object during a second period of time; andcalculating means for producing a measured value corresponding to the amount of light received during the first period of time and a reference value corresponding to the amount of light received during the second period of time, normalizing the measured value with the reference value, and calculating the distance to the object based on the normalized measured value.