AI Article Synopsis
- Continuous monitoring of trunk flexions using wearable sensors can help workers prevent risks from poor posture and movements.
- Stretchable piezo-capacitive elastomeric sensors have been developed as lightweight, cost-effective devices that measure human movement through changes in capacitance.
- The study compares the calibration and performance of these capacitive sensors against accelerometers and gyroscopes, finding that while capacitive sensors show better accuracy overall, they work best in conjunction with inertial sensors rather than as direct replacements.
Article Abstract
Continuous monitoring of flexions of the trunk via wearable sensors could help various types of workers to reduce risks associated with incorrect postures and movements. Stretchable piezo-capacitive elastomeric sensors based on dielectric elastomers have recently been described as a wearable, lightweight and cost-effective technology to monitor human kinematics. Their stretching causes an increase of capacitance, which can be related to angular movements. Here, we describe a wearable wireless system to detect flexions of the trunk, based on such sensors. In particular, we present: (i) a comparison of different calibration strategies for the capacitive sensors, using either an accelerometer or a gyroscope as an inclinometer; (ii) a comparison of the capacitive sensors' performance with those of the accelerometer and gyroscope; to that aim, the three types of sensors were evaluated relative to stereophotogrammetry. Compared to the gyroscope, the capacitive sensors showed a higher accuracy. Compared to the accelerometer, their performance was lower when used as quasi-static inclinometers but also higher in case of highly dynamic accelerations. This makes the capacitive sensors attractive as a complementary, rather than alternative, technology to inertial sensors.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8398997 | PMC |
| http://dx.doi.org/10.3390/s21165453 | DOI Listing |
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