Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Device actuated by presence of land vehicle
Patent
1989-03-27
1991-01-15
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Device actuated by presence of land vehicle
342192, 342195, 340910, G01S 1391, G08G 1081
Patent
active
049857053
ABSTRACT:
A method for compiling and evaluating local traffic data based on a real time evaluation of Doppler echoes on a digital basis, wherein initially the frequency spectrum of the Doppler echo is formed, then the frequency of the maximum amplitude in this spectrum is identified, and the speed of the vehicle is determined from this frequency. The length of the vehicle can also be determined from the speed of the vehicle and from the Doppler echo signal duration. An apparatus for implementing the method includes a millimeter wavelength radar sensor, a transmission unit, and an evaluation unit operating with digital signal processing.
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Barron Jr. Gilberto
Telefunken Systemtechnik GmbH
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