ISSN 0914-4935

Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Using Two-axis-three-points policy and Bezier Curve to Build an Indoor Navigation System

Wen-Cheng Pu and Cheng-Hao Bi

(Received June 29, 2018; Accepted October 29, 2018)

Keywords: two-axis-three-sampling-points, medical assistive device, RSS, indoor automated navigation

In this study, we combine the received signal strength (RSS) signal of a Wireless Fidelity (WIFI) router and the signal of a gyroscope on a medical assistive device to propose an indoor automated navigation system for the medical assistive device. The system meets the need of the home environment with only one WIFI router and satisfies the low-bandwidth conditions. It also interacts with the environment to map out the evacuation route based on the Bezier curve and takes the structure of a traditional medical assistive device into consideration. During the navigation process, the received signal strength indication (RSSI) signal of the WIFI router and the additional gyroscope information on the medical assistive device are detected to perform positioning. At the fastest, only two-axis three-points (TATP) are needed for indoor positioning. Thanks to a lesser need for the bandwidth, this method is useful for improving the efficiency of navigation and resolving the congestion problem. It also utilizes the Bezier curve to build proper navigation routes automatically and lessen the burden for humans as a result. Finally, in this study, we use ATMEL 328PU as the control center to design a navigation vehicle that simulates the medical assistive device. The PC is utilized as a recording center, and the bluetooth communication module and the navigation vehicle work as information-transmitting channels to construct a hardware testing platform. The software Matlab is used for analyzing and recording on the PC. Lastly, the final data result is used to prove the accuracy and feasibility of the theory.

Corresponding author: Wen-Cheng Pu




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