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An Efficient Electronic Wheelchair Seat Balancing Maintain Methodology Applying Smart Sensors
Sanghyun Park,Jinsul Kim,Yonggwan Won 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.1
In this paper we propose a new solution which utilizing the Gyro Sensor and Tilt Sensor in real-time controlling the balance of wheelchair seat. The existing wheelchair systems have the risk of falling when users go uphill because of the uneven weight allocation. But when applying our new method, the wheelchair seat can automatically adjust to maintain the balance therefore provides a safer and more stable ride. In order to adjust the seat correctly, we calculate the seat angle using Tilt Sensor. However, due to the law of inertia when wheelchair is moving there is deviation in output value of Tilt Sensor. To solve this problem, a Gyro sensor is used for measuring the acceleration and get the correct value of tilting angle. Through various experimentations we can prove that by taking advantage of Gyro sensor and Tilt sensor combination, the system is able to determine the correct seat angle in both cases when the wheelchair moving or not. We also tackle the power consumption issue in wheelchair, by using ZigBee sensor module to retrieve terrain information in advance and controlling the balance by two motors thus the overall power consumption for seat balancing is reduced significantly.
Smart Sensor-based Interface Controlin the Mobile CloudEnvironment
Sanghyun Park,Ilmin Kim,Jinsul kim 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.10
In this paper we propose the use of cloud services to delivery next-generation dynamic mobile interface. The improvement is focused on existing soft keyboard application. Through a simple sign-in process, the customized keyboard interfaced defined by user own can by synced, stored on the cloud and ready to be apply on other compatible devices of the same user in anytime. With cloud based interface, through specific username and password, various smart mobile devices are able to receive their custom interface. Also, we use Gyro Sensor and Wi-Fi direct to help the users freely share their layout through the internet.