G - Physics – 01 – S
Patent
G - Physics
01
S
349/34
G01S 15/60 (2006.01) G01S 15/62 (2006.01)
Patent
CA 1200005
ABSTRACT OF THE DISCLOSURE A measuring apparatus for the automatic measure- ment of speed, travelled distance and directional changes of a movable body by means of ultrasonic wave Doppler shifts has two measuring units disposed on the underside of a ve- hicle at a spacing transversely of the vehicle substantially equal to the vehicle width. Each measuring unit comprises means for effecting measurements in a direction parallel to the direction of travel of the vehicle and includes a transmitter and a receiver, the transmitters being disposed such that ultrasonic beams transmitted therefrom at an angle are reflected from the ground and are received by the re- ceivers. The Doppler shift of the received signals is used for indicating the speed and the distance travelled, and a difference between left-hand and the right-hand measured values from respective ones of the measuring units relating to the travelled distance is used to indicate the direction- al deviation of the vehicle relative to the ground.
403986
Hesselbrock Bernd
Rott Joachim
Thelen Wolfgang
G. Ronald Bell & Associates
Krone Gmbh
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