MEASUREMENT METHOD AND MEASUREMENT PROGRAM

摘要

[PROBLEMS] To provide a method for measuring a distance to an object and a surface shape of the object by using an ultrasonic wave and capable of performing measurement even when the object is in an inclined position. [MEANS FOR SOLVING PROBLEMS] The method includes: step S1 for continuously outputting an ultrasonic wave of a first frequency, step S2 for sampling a reflected wave from an object associated with the ultrasonic wave of the first frequency, step S3 for calculating a relative speed of the object according to a first sampling data string sampled, step S4 for outputting the ultrasonic wave of the second frequency, step S5 for sampling the reflected wave from the object associated with the ultrasonic waves of the first and the second frequency, and step S6 for detecting one or more reflection time associated with the ultrasonic wave of the second frequency according to the second sampling data string which has been sampled and calculating a distance to the object or the number or depth of the step on the surface of the object according to the reflection time. Since this method can detect a distance to a wall and a step, this method can be used for putting a vehicle into a garage.