DISTANCE MEASURING DEVICE

摘要

A distance measuring device that can identify a reflected wave by a target object as a measurement target from among reflected waves when the reflected waves are observed in response to one output wave. The device transmits an output wave plural times from a speaker while moving, and acquires waveform data of a sound wave that is received by a microphone every time the output wave is transmitted and includes plural reflected waves caused by reflection of the output wave. Furthermore, the distance measuring device identifies a reflected wave by the target object as the measurement target from among the plural reflected waves according to change in the reception timing of each of the plurality of reflected waves included in each of plural pieces of the acquired waveform data, and calculates the distance to the target object on the basis of the reception timing of the identified reflected wave.

主权项

1. A distance measuring device that measures distance to a target object, the distance measuring device comprising:
a speaker; a microphone; at least one memory configured to store computer program code; at least one processor electrically connected to said memory and configured to access said computer program code and operate as instructed by said computer program code, said computer program code including: output wave transmitting code configured to cause at least one of said at least one processor to transmit an output wave a plurality of times from the speaker while the distance measuring device is moving; waveform data acquiring code configured to cause at least one of said at least one processor to acquire waveform data of a sound wave that is received by the microphone every time the output wave is transmitted and includes a plurality of reflected waves caused by reflection of the output wave; reflected wave identifying code configured to cause at least one of said at least one processor to identify a reflected wave by the target object from among the plurality of reflected waves according to change in reception timing of each of the plurality of reflected waves included in each of a plurality of pieces of the acquired waveform data; and distance calculating code configured to cause at least one of said at least one processor to calculate the distance to the target object on the basis of reception timing of the identified reflected wave.