An Improved Self-Powered Vehicle Detection System.
DEPARTMENT OF THE NAVY WASHINGTON DC
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An improved self-powered vehicle detector SPVD uses a two-axis magnetometer in conjunction with digital nulling loops to sense a vehicles magnetic signature and then telemeter vehicle presence information to a roadside receiver. The SPVD system includes a tone code transmitter and an omnidirectional microstrip antenna to simplify installation and maintenance of the SPVD. Author
- Surface Transportation and Equipment
- Magnetic and Electric Field Detection and Detectors