Alarm System and Emergency Message from Wheelchair User Emergency Condition

Abstract

When someone uses a wheelchair, there is still the possibility of an accident to the user, such as when the user suddenly falls down from the wheelchair or the user falls down along with the wheelchair. For notification of emergency conditions for wheelchair users, an alarm system is designed that can send messages to the intended mobile number. The system is designed using Wemos D1 mini, Ultrasonic, MPU-6050 and Proximity E18-D80NK sensors. The conclusion from the measurement and test results are: the value read by the MPU-6050 sensor is taken one axis for each direction when the wheelchair was falling down, Y≤180o for left falling down, X≤50o for right falling down, Z≤65o for forward falling and Z≥140o for backwards falling down. The Ultrasonic sensor works well for detecting the presence of user’s legs and the E18-D80NK proximity sensor works well for detecting the position of the user who is sitting in a wheelchair. Receiving notifications through the BLYNK server works well, not affected by distance provided there is an internet connection connected to the device.

Fall detection and notification system to fast emergency management for the elderly

“…Previous research related to the treatment of fall conditions for the elderly is alarm system with emergency notification when fall down condition from wheelchair user [7]. In this study specifically for elderly or someone who is independent in daily life but must use a wheelchair in carrying out their activities.…”

The Effect of Motor Parameters on the Induction Motor Speed Sensorless Control System using Luenberger Observer

“…Sensorless control systems evolved to overcome the challenges of sensor installation that sensor-based control systems faced. Sensor-based control systems are widely used by researchers, such as those of Z. Alpholicy X., et al [1] and Y. E. Loho, et al [2]. Sensors will drive up prices and complicate installation [3].…”