Patent ID: 9534349
Date: 2017-01-03
CPC Classifications: E01C,G01B

Claim:
1. A road paver comprising: a screed for applying a material layer to a foundation; and a layer thickness detecting device for detecting the thickness of the material layer applied, wherein the layer thickness detecting device comprises a first sensor behind the screed, in the direction of travel, for detecting a first distance from the applied material layer and a second sensor in front of the screed, in the direction of travel, for detecting a second distance from the foundation, wherein the layer thickness detecting device is securely attached to the screed, and wherein the layer thickness detecting device comprises a signal processing unit that is configured to detect the layer thickness of the applied material layer on the basis of the sensor signals from the first sensor and from the second sensor, of the distances of the first sensor and of the second sensor from a rear screed edge, and of the attachment heights of the first sensor and the second sensor relative to the rear screed edge; wherein the attachment heights of the first sensor and of the second sensor relative to the rear screed edge are the same, and the layer thickness of the applied material layer is determined as follows: h s s B=attachment height of the first sensor and of the second sensor relative to the rear screed edge, a=distance of the first sensor from the rear screed edge, and b=distance of the second sensor from the rear screed edge.