Find the Gap: Multi-band, Remote Measurement System to Quantify the Fit of Wearable Systems" published in IEEE Sensors
Abstract:
We propose a technique for remotely measuring the gap between an external wearable device/clothing surface and the underlying (visually obstructed) body surface – which we refer to as the garment-body ’air gap’ – that commonly occurs in positive ease garments (i.e., garments that are larger in dimension than the underlying body dimension). To achieve this, we developed a triple-frequency band remote measurement system based on a 77-81 GHz FMCW radar, a 40kHz ultrasound sensor, and an infrared 344 GHz proximity sensor. When used synergistically, these sensors allow for remote measurement of the uniaxial distances to multiple layered surfaces simultaneously.