WiForce: Wireless Sensing and Localization of Contact Forces on a Space Continuum
summary
Wireless WiForce converts contact force magnitude and location into phase shifts on a backscatter tag and reads them wirelessly using an OFDM reader and Doppler transform implemented on a USRP. Design uses a flexible microstrip beam, RF switches with duty‑cycled toggling to separate ends, and single‑antenna reception. System works across up to 3 GHz, reads through tissue phantoms, and achieves 0.3 N accuracy and 0.6 mm localization in evaluations.
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chapters (22)
- 0:00Intro
- 0:25Need for a sensory layer like skin
- 1:01Emerging use-cases of sensor skins
- 1:18Wired sensing of force profile
- 1:41Problems with sensing wires
- 2:00Need for wireless force sensing
- 2:17Naive wireless feedback solution Force F
- 3:03Combining sensing and communication
- 3:49Encoding force into wireless signal reflections Mechanical perspective: The
- 5:01How are contact lengths measured wirelessly
- 5:43Handling interference caused by two-sided reflect
- 6:30Two swords in one sheath don't fit together
- 7:25Doing one at a time toggling
- 7:38Interleaving the off times creates continuous modul
- 7:59One antenna to sense them all
- 8:12Putting it all together: implementation of the real
- 9:24Sensor implementation
- 9:53Wireless experimental setup
- 10:09Force magnitude and location CDFS
- 10:35Tissue phantom testing setup
- 11:01Related works
- 11:35Future directions
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