A Smart Chair for Sitting Postures Monitoring and Seat Occupancy Detection

Abstract

In recent years, occupational roles often require extended periods of sedentary activity, particularly sitting in front of computer screens. Incorrect sitting postures adopted during such activities can lead to various health issues such as muscularimbalances and spinal misalignment. Therefore, a Smart Chair for Sitting Postures Monitoring and Seat Occupancy Detection is proposed in this work to overcome those health issues. The Smart Chair design incorporates four ultrasonicsensors to actively monitor the distance between the user’s back and the seat cushion. When poor posture is detected, the Blynk application sends alert notifications to the user’s mobile phone. Additionally, the seat occupancy detection system, powered byfour Force Sensing Resistor (FSR) sensors, proves useful in multi-user environments. Real-time alerts via the Blynk application enhance the operational efficiency of the Smart Chair. Validation assessments conducted with three volunteers of varyingheights and weights confirmed the effectiveness of the ultrasonic sensors in monitoring sitting postures. The sensors operate consistently with the predefinedtruth table. Additionally, the validation process for seat occupancy detection, usingthe same volunteers, demonstrates system reliability and responsiveness. Alert notifications are accurately sent to users’ mobile phones upon detecting physical pressure. In a nutshell, the Smart Chair has demonstrated its effectiveness in continuously monitoring sitting postures and detecting seat occupancy which contributes to a health-conscious and intelligent seating solution, enhancing the overall user experience.