Importance

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Abstract

Power efficient, modular sensor devices utilize magnetic sensor elements, wireless data communication and sensor device level processing to detect, evaluate and classify roadway vehicles. Sensor devices are configured in a network enabling data sharing between sensor devices. Earth generated magnetic fields are monitored within the range of each sensor device with reliability and stability over a wide range of environmental conditions and sensor device placements to detect field distortions specifically caused by a variety of roadway vehicles. Multiple sensor devices configured as a network, communicating with other sensor devices and one or more substations, collect, generate, share and evaluate data to determine multiple attributes of roadway vehicle events. Analog field distortion (waveform) measurements are converted to digital format and analysis on the detected waveform to classify the waveform event as a roadway vehicle of particular type and to determine a unique signature for the waveform event. Direction and speed of roadway vehicles and distinctions between roadway lane events can be realized, as well as detection of stationary roadway vehicles within sensor device range. Data is wirelessly transmitted between system elements to verify the integrity and health of all system elements on a continuing basis. One or more substation controllers and/or control stations and can configure, evaluate condition and status, process and relay unique signature data for a defined sensor device array, control operation of auxiliary devices and visual warning devices, and communicate with other substations and/or interface with a signal controller or central office.

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First Claim