TRAVEL DISTANCE MEASUREMENT DEVICE

摘要

A travel distance measurement device includes a transmitting antenna that is disposed in a vehicle and emits a transmission signal, as a radio wave, toward a ground surface, a receiving antenna that is disposed in the vicinity of the transmitting antenna, and receives a radio wave reflected from the ground surface and acquires a reflection signal, and a distance calculator (an IQ demodulator and a phase conversion integrator) that calculates the travel distance of the vehicle on the basis of the phase of the acquired reflection signal.

主权项

1: A travel distance measurement device comprising:
a transmitter that is disposed in a vehicle and emits a transmission signal, as a radio wave, toward a ground surface; a receiver that is disposed in a vicinity of said transmitter, and receives a radio wave emitted from said transmitter and reflected from said ground surface and acquires a reflection signal; and a distance calculator that calculates a travel distance of said vehicle on a basis of a result of integrating a variation of a phase difference between the reflection signal acquired by said receiver and said transmission signal.