A tactile-output paging communication system for the deaf-blind
Abstract
A radio frequency paging communication system that has coded vibrotactile outputs suitable for use by deaf-blind people was developed. In concept, the system consists of a base station transmitting and receiving unit and many on-body transmitting and receiving units. The completed system has seven operating modes: fire alarm; time signal; repeated single character Morse code; manual Morse code; emergency aid request; operational status test; and message acknowledge. The on-body units can be addressed in three ways: all units; a group of units; or an individual unit. All the functions developed were integrated into a single package that can be worn on the user's wrist. The control portion of the on-body unit is implemented by a microcomputer. The microcomputer is packaged in a custom-designed hybrid circuit to reduce its physical size.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1979
- Bibcode:
- 1979STIN...8121251B
- Keywords:
-
- Communication Equipment;
- Duplex Operation;
- Signal Transmission;
- Tactile Discrimination;
- Transmitter Receivers;
- Aerospace Technology Transfer;
- Hybrid Circuits;
- Microcomputers;
- Microelectronics;
- Telemetry;
- Communications and Radar