Microcontroller-Based Seat Occupancy Detection and Classification

Proceedings

Cota-Ruiz, Juan¹  Sifuentes, Ernesto²  González-Landaeta, Rafael³  Reverter, Ferran⁴ 

[1] Author to whom correspondence should be addressed.;Department of Computer and Electrical Engineering, Universidad Autónoma de Ciudad Juárez (UACJ), Ciudad Juárez 32310, Mexico;Department of Electronic Engineering, Universitat Politècnica de Catalunya-BarcelonaTech, 08860 Castelldefels, Spain;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.

关键词: autonomous sensor;    force sensing resistor;    microcontroller;    resistive sensor;    seat occupancy detection;    sensor interface electronics;   

DOI  :  10.3390/proceedings2131040

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY