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Wireless sensor nodes capable of vehicle speed measurement can replace traditional speed measurement systems such as dual loop detectors. We designed a wireless sensor node for vehicle velocity measurement using two magnetic sensors. We present the sensor node architecture, velocity measurement methods, algorithms, and propose an implementation method for the SAD algorithm for which a hardware accelerator...
In this paper, we present a wireless sensor infrastructure for traffic safety. Real time information and possible dangerous situations are detected by wireless sensors installed in the roadway. The information is used to provide warning messages to drivers. We designed and implemented a flexible TDMA-CMSA/CA hybrid medium access control (MAC) protocol for wireless sensors guaranteeing deterministic...
We designed RRMAC, a time division multiple access (TDMA) scheme guaranteeing hard real-time and reliable communication in a multi-hop convergecast network. We performed experiments to compare the performance of RRMAC and IEEE 802.15.4 and showed the advantages of RRMAC is WSN applications which require highly reliable real-time data transmission.
This paper presents a unique approach for contactless liquid level measurement via the free-space electromagnetic damping phenomenon. By measuring the attenuation and phase shift of a wave reflected from the liquid surface, the liquid level in the tank can be determined. This research project has been undertaken because of a rising demand in the automotive industry for low-cost contactless level detection...
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