Microcontroller-Based Seat Occupancy Detection and Classification
Document typeConference lecture
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
European Commisision's projectCESAR - Cost-Efficient Methods and Processes for Safety Relevant Embedded Systems (EC-FP7-100016)
This paper presents a microcontroller-based measurement system to detect and confirm the presence of a subject in a chair. The system relies on a single Force Sensing Resistor (FSR), which may be arranged in the seat or backrest of the chair, that undergoes a sudden resistance change when a subject/object is seated/placed over the chair. In order to distinguish between a subject and an inanimate object, the system also monitors small-signal variations of the FSR resistance caused by respiration. These resistance variations are then directly measured by a low-cost general-purpose microcontroller without using either an analogue processing stage or an analogue-to-digital converter, thus resulting in a low-cost, low-power, compact design solution.
CitationSifuentes, E. [et al.]. Microcontroller-Based Seat Occupancy Detection and Classification. A: EUROSENSORS. "Proceedings XXXII Eurosensor". Basel: Multidisciplinary Digital Publishing Institute (MDPI), 2018, p. 1-5.