Identifying Contact Fingers on Touch Sensitive Surfaces by Ring-Based Vibratory Communication
summary
System identifies which finger touches a surface by sending coded vibrations through wearable rings and reading them with a microphone, achieving up to 93% lab accuracy and 90.5% in a cafe. It uses two actuator rings and a tablet microphone (also demonstrated with a wireless earbud), encodes each finger as a unique carrier frequency with on-off keying, and demodulates via cross-correlation. Best protocol uses a 50-ms pulse repeated three times and detects seven contact states from three fingers.
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chapters (10)
- 0:00Start
- 0:52DEMONSTRATION
- 1:08SYSTEM OVERVIEW
- 1:28SYSTEM IMPLEMENTATION
- 1:43OPERATION PRINCIPLE
- 2:48INVESTIGATE COMMUNICATION CHANNELS
- 3:08SIMULATE VIBRATION TRANSMISSION
- 3:50USER STUDY: COMMUNICATION PROTOCOLS
- 4:09USER STUDY: CONTACT FINGER IDENTIFICATION
- 4:54APPLICATIONS
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