Patent ID: 6646592
Filing Date: 2003-11-11
Classification: G01S

Abstract:
A pulse radar device comprising:a transmitting means for transmitting a pulse-shaped, radio wave; a receiving means for receiving a reflection wave generated by reflection of the radio wave transmitted from the transmitting means by an object and outputting a reception signal; a comparator means for converting the reception signal from the receiving means into a binary signal by comparing the reception signal with a preset and predetermined level; a first integrating means for sampling an output from the comparator means at predetermined time intervals from transmission and integrating results of a predetermined number of times of the sampling at each sampling timing; a differential operating means for, each time a predetermined time period has passed, reading results of the integrating by the first integrating means at each sampling timing and differentiating the read results of the integrating in a sampling direction; a second integrating means for integrating absolute values of a predetermined number of outputs from the differential operating means at each sampling timing; a peak detecting means for detecting a peak based on an output from the second integrating means; a distance measuring and detecting means for calculating a distance to the object and judging presence or absence of the object based on an output from the peak detecting means; and a timing control means for performing timing control for the transmission of the radio wave, the reception of the reflection wave, and signal processing.