A Mortise-Tenon Structured Capacitive Pressure Sensor Array Toward Large-Area Indoor Activity Monitoring
- Resource Type
- Periodical
- Authors
- Cao, Y.; Zhu, Z.; Wang, S.; Jin, M.; Huang, P.; Hou, D.
- Source
- IEEE Sensors Letters IEEE Sens. Lett. Sensors Letters, IEEE. 8(5):1-4 May, 2024
- Subject
- Components, Circuits, Devices and Systems
Robotics and Control Systems
Communication, Networking and Broadcast Technologies
Signal Processing and Analysis
Sensors
Floors
Sensor arrays
Electrodes
Capacitive sensors
Capacitance
Loading
Mechanical sensors
activity monitoring
capacitive pressure sensor array
floor sensor
low-cost
pressure distribution mapping
smart building
- Language
- ISSN
- 2475-1472
This letter proposed a large-scalable and quick-assembled capacitive pressure sensing floor using mortise and tenon structure of commercial wooden floors. The cost-efficient fabrication is enabled using the ethylene-vinyl acetate copolymer (EVA) foam dielectric and copper tape electrodes. The influence of the dielectric layer thickness and electrode width on the sensing performances has been investigated, showing the highest sensitivity of 0.175% kPa −1 and a low hysteresis error of 8.25% for the single sensing pixel within the human-floor contact pressure range. A 0.36 × 1.82 m 2 sensing floor containing 6 × 28 pixelated sensors is assembled based on seven floor tiles to demonstrate the detection of distinct pressure distributions during different exercises. The reported pressure sensing floor shows promising applications in indoor human activity monitoring.