Accession Number : ADA499556

Title :   Designing an Ultrasonic Modem for Robotic Communications

Descriptive Note : Final rept. Jan-Mar 2008

Corporate Author : ARMY RESEARCH LAB CLEVELAND OH VEHICLE TECHNOLOGY DIRECTORATE

Personal Author(s) : Shumaker, Justin

PDF Url : ADA499556

Report Date : MAR 2009

Pagination or Media Count : 26

Abstract : An ultrasonic modem is a device that can transmit information acoustically. One was designed for the 2008 FIRST Robotics League competition to provide short-range communications with the robot. The creation of this device was the result of a regulation that inhibited any use of electromagnetic-based communications technology in the competition. The ultrasonic modem consists of easily attainable and low-cost parts and was designed to attenuate ambient noise in the audible frequency domain and reliably send a 2-bit message at a rate of 10 Hz or higher. Each message referred to a high-level control command that the robot would perform.

Descriptors :   *MODEMS, *AUDIO FREQUENCY, *AMBIENT NOISE, *ULTRASONICS, *ROBOTS, COMMUNICATION AND RADIO SYSTEMS, FREQUENCY DOMAIN, ACOUSTIC COMMUNICATIONS, COMPETITION

Subject Categories : Computer Hardware
      Acoustics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE