Fall Monitoring Device for Old People based on Tri-Axial Accelerometer

Abstract

Abstract-To be able to timely and effective judgment of the elderly fall, a fall monitoring device based on tri-axis accelerometer for elderly is designed. The device collects acceleration and the angle between elderly and horizontal plane of elderly people by MPU6050 tri-axial accelerometer, comparing the acceleration and angle that people and horizontal plane with threshold value to determine whether the old people fell. Delay for a period of time compared the angle and threshold again to judge the elderly in the fall still, finally send text messages to a mobile phone of guardian by GPRS module so that elderly can be helped.

Design of Fully Automatic Drone Parachute System with Temperature Compensation Mechanism for Civilian and Military Applications

“…It must also be reliable, to eliminate possible mistakes and unintentional firing of the parachute [19], because unnecessary parachuting at low altitude can damage objects on the ground. Avoiding such accidents requires accurate identification of the free falling state regardless of the axis and angle of the fall [20], but considering varying airflow the drone is subject to during the flight is a considerable challenge. Analysing drone on-board sensor parameters (such as acceleration [21]) can help to avoid false parachute deployment, while it still ensures the protection of the drone from hitting the ground.…”