Method and apparatus for non-contact measuring of the deflection of roads or rails
AssigneeGreenwood Engineering ApS
InventorLeif Gr.o slashed.nskov
Life of this patent
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Abstract
Equipment for non-contact measurement of the deflection of a road (2) comprises a self-propelled vehicle with a load (7) which influences at least one wheel (4), the speed of which is measured in the direction of travel. The equipment further comprises a laser device (8) from which at least one electromagnetic beam (9) is directed towards the rodway in the vicinity of the vehicle, and the Doppler frequency change in the reflection (9) is detected. An electronic circuit (10) continuously registers the results of the measurements and herewith the deflection at normal traveling speed.
Claims14
Method for non-contact measurement of the deflection of a road or rail while loaded by a travelling vehicle with weight-loaded drive-wheels, the speed of which in the direction of travel is measured, characterized in that the speed of the deflection is measured continuously while the vehicle is travelling by the measurement of the vertical speed of the road or rail using sensors which detect the Doppler frequency change in the reflections from at least one transmitted beam directed towards the roadway or the train rail, the beam obtained using one selected from the group consisting of a laser technique, radar technique, and an ultrasonic technique, after which the deflection can be calculated.
Equipment for non-contact measurement of the deflection of a road or train rail while using a vehicle with a load which influences at least one wheel, the speed of which is measured in the direction of travel, characterized in that it further comprises
- a) at least one device for the transmission of a wave selected from the group consisting of laser radiation, radar waves, and ultrasonic signals which gives rise to a Doppler frequency change at a relative movement between the device and the reflection point down towards the roadway, the rail or the rail's underlayer,
- b) at least one sensor arranged to detect the Doppler frequency change in the reflections of the emitted radiation, and
- c) an electronic circuit for the continuous registration of the detected Doppler frequency changes for the calculation of the speed of the deflection.
Dependencies are inferred from the claim text.