Thesis Details
Echo-Based Distance Measurement on Mobile Phone
The aim of this work is to create an application for mobile device to measure distance using echo. It focuses on testing of device components and signal selection with appropriate parameters. In the first part of work --- evaluation of device ability to play and record sound --- the result is determination of sound frequency and strength with which the device is able to work. Next, the work describes the algorithm to measure distance based on using cross-correlation of transmitted and received signals. Finally, the implementation of aforementioned algorithm in application for Android operation system is presented, with solution for communication and synchronization between individual components of application. Implementation of designed algorithm in application is tested. Based on the data, we can conclude that it is possible to measure distance from half a meter to approximately three meters, based on noises, with a precision of tenth of a meter.
sonar, distance measurement, mobile device, cross-correlation, characteristics of loudspeaker and microphone of mobile device
Burget Lukáš, doc. Ing., Ph.D. (DCGM FIT BUT), člen
Kočí Radek, Ing., Ph.D. (DITS FIT BUT), člen
Kotásek Zdeněk, doc. Ing., CSc. (DCSY FIT BUT), člen
Křivka Zbyněk, Ing., Ph.D. (DIFS FIT BUT), člen
@bachelorsthesis{FITBT14469,
author = "Ji\v{r}\'{i} Richter",
type = "Bachelor's thesis",
title = "Echo-Based Distance Measurement on Mobile Phone",
school = "Brno University of Technology, Faculty of Information Technology",
year = 2015,
location = "Brno, CZ",
language = "english",
url = "https://www.fit.vut.cz/study/thesis/14469/"
}