Sensor arrays, methods, systems and devices
AssigneeMetrocount Pty Ltd
InventorsSami Karjalainen, Thomas Kenny
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Abstract
In one preferred form of the present invention, there is provided a road-based traffic sensor comprising: a body having a base and an upper portion; the body housing electronic components including a magnetometer and a battery; the magnetometer for monitoring changes in magnetic field; the body having a slim line configuration and being able to support heavy vehicles travelling at speed; the slim line configuration of the body having a height no more than 25 mm and housing the electronic components; the base for being adhesively secured to the upper surface of the road with negligible damage to the upper surface.
Claims27
A method of road traffic data collection comprising:
- providing arrays of two or more wireless sensors mounted-on, in, or at a surface of a road network, each sensor including a magnetometer configured to monitor changes in magnetic field;
- receiving magnetic field waveform data from information sent by the sensors;
- analysing the magnetic field waveform data from each sensor by computing one or more characteristic values, indices, or signatures derived from the waveform, the analysis comprising at least one of:
- time-domain analysis, frequency-domain analysis, statistical analysis, or a transformation of the waveform data, wherein the characteristic values are used for event detection, classification, or sensor association;
- determining traffic information including vehicle volume or vehicle speed based on the analysed data;
- and
- compensating for sensors that have become separated from the road or are otherwise malfunctioning.
A system for traffic analysis comprising:
- a. arrays of two or more wireless road-based sensors mounted on, in, or at a surface of a road network, each sensor including a magnetometer;
- b. a receiver configured to receive magnetic field waveform data from information sent by the sensors;
- and
- c. an analyser configured to analyse the waveform data by computing one or more characteristic values, indices, or signatures derived from the waveform, the analysis comprising at least one of:
- time-domain analysis, frequency-domain analysis, statistical analysis, or a transformation of the waveform data, and to determine traffic information including vehicle volume or speed, while compensating for malfunctioning or separated sensors.
Dependencies are inferred from the claim text.