Measurement of Time-of-Flight for Measurement of Temperature Distribution in Boilers.

概要

論文の詳細を見る
One approach to measure the temperature distribution in boilers is the measurement of the time-of-flight between acoustic sensors on the walls. The authors previously proposed a time-of-flight measurement system which made use of a pattern matching between actual and predicted sound waves, when sinusoidal pulse wave was transmitted from a speaker on one wall to an acoustic sensor on another wall. But, the method was a little troublesome, because it required to compensate for the predicted sound wave to realize a high accurate measurement of the time-of-flight.This paper proposes a new approach measuring the time-of-flight by observing the phase difference between the transmitted and received signals (in stationary state) for several inputs of different frequencies. This yields the robustness on the existence of the noise. Simulations and experiments show the effectiveness of the proposed approach.
公益社団法人計測自動制御学会の論文