Summary
The authors wanted to create a wrist worn sensor that can read nearby RFID tags and the wearer's gestures in order to identify the interaction. They used a Porcupine sensor, an accelerometer-based module that allows power-efficient capturing of inertial data and a real-time clock and calendar chip. To read the RFID tags, the M!-mini from SkyeTek was chosen. They performed the box test to evaluate wrist-worn RFID antennas, and found out that a reading rate of 1 Hz balances capturing tags and saving power. They tested the sensing in an hour long gardening session. They also tested to see how long the battery would last. After charging it overnight, the longest continuous log lasted 18 hours, and the battery was never depleted. They estimate being able to run this for at least 2 days continuous.
Commentary
Although this seems like an interesting way to detect objects and interactions, it still seems awkward to wear the wrist sensors. Also, this would work if everything had a RFID sensor, which I'm not too sure of.
E. Berlin, J. Liu, K. van Laerhoven, and B. Schiele. Coming to Grips with the Objects We Grasp: Detecting Interactions with Efficient Wrist-Worn Sensors. 2010
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