DISTANCE ESTIMATION DEVICE AND METHOD USING THE DIFFERENCE OF WAVE SPEED BETWEEN WAVES

摘要

The present invention provides a distance estimating apparatus which includes: a wave signal detection unit for detecting respective different wave signals by respectively measuring different types of waves; a time delay estimation unit for calculating a correlation coefficient from the detected different wave signals and calculating an arrival time difference using the correlation coefficient; and a distance calculation unit for estimating the distance of an object to be estimated by using the arrival time difference in the different wave. [Reference numerals] (112) Signal stabilization unit; (121) Signal process unit; (122) Digital signal conversion unit; (131) Correlation estimation unit; (132) Arrival time delay calculation unit; (140) Distance calculation unit