Abstract
This work uses a low-cost, reliable, and microchip-based wireless transmission solution to real-time collect earthquake data across local and wide areas. A transmission chain consisting of sensor units (nodes), each transmitting earthquake data unidirectionally to the end, is proposed. Each node consists of a seismic sensor, analog digital converter, radio frequency module, and a microchip for central control. The terminal node is responsible for transmitting data to a display server, which collects and analyzes all earthquake data from different transmission chains. Moreover, users also can distribute nodes, plug-in computers, in a wide area to monitor earthquake activities and transmit data to a web server. Then interested people can view the circumstance of an earthquake via web maps. For efficient wireless transmissions and to maximize bandwidth usage, a modified ripple protocol is applied to the wireless transmission between nodes in a daisy chain. Field experiments verify the practicality of the proposed system.
Highlights
Taiwan is located in an active earthquake zone on the western Pacific Ocean Rim
The system consists of sensors, signal converters, data transmitters, data storage, and a user interface
To evaluate the performance of the proposed paired ripple transmission (PRT), the PRT was compared with the regular wireless transmission (RWT)—radio frequency (RF) without using ripple transmission
Summary
Taiwan is located in an active earthquake zone on the western Pacific Ocean Rim. The convergence of the western Eurasian plate and the eastern Philippine Sea plate causes Taiwan’s earthquakes. Developing a seismic monitoring system, which can catch an earthquake’s signals and analyze earthquake data is important [1,2,3,4,5]. Sensors are often used in harsh environments. How to develop a reliable sensing solution for monitoring the variation of environment becomes very challenging [6]. A seismic monitoring system needs many sensors, sited at many locations, and all of these sensors must send signals to a collection center. The system consists of sensors, signal converters, data transmitters, data storage, and a user interface. Signal converters change the analog signals to digital signals and transmit the digital data to a data storage device. Users can access the data and analyze it via the user interface.
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