Testing apparatus
A testing apparatus is provided that includes a carrying construction for supporting a road section, and a frame for positioning a test wheel on the surface of the road section. During operation of the apparatus the test wheel, by a tread thereof, describes a circular path over the road surface. The frame is provided with a sensor for measuring a force exerted on the measuring wheel by the road surface.
1. A testing apparatus, comprising a carrying construction for supporting a road section, and a frame for positioning a test wheel on the surface of the road section, such that during operation of the apparatus the test wheel, by a tread thereof, describes a circular path over the road surface, wherein the frame comprises a carrying arm to which the test wheel is rotatably mounted, said testing apparatus comprising a sensor integrated into the carrying arm for measuring the deformation of the carrying arm for determining a force exerted on the test wheel by the road surface.
2. The testing apparatus according to claim 1 , wherein the carrying construction comprises a turntable rotatable about a central axis.
3. The testing apparatus according to claim 1 , furthermore comprising a road section which is detachably arranged as a separate module on the carrying construction.
4. The testing apparatus according to claim 1 , wherein the road section is substantially disk-shaped.
5. The testing apparatus according to claim 1 , wherein the sensor comprises a strain gauge.
6. The testing apparatus according to claim 1 , wherein the sensor is positioned in a local reduction of the carrying arm.
7. The testing apparatus according to claim 1 , furthermore comprising at least two sensors which are arranged at different positions in circumferential direction around the carrying arm for measuring deformations of the carrying arm in different orientations for determining force components in different orientations exerted on the test wheel.
8. The testing apparatus according to claim 1 , wherein an angle of the test wheel axis relative to the circular path on the road surface is adjustable.
9. The testing apparatus according to claim 1 , wherein the frame comprises a plurality of carrying arms, each for carrying a test wheel.
10. The testing apparatus according to claim 9 , wherein the test wheels each follow a track of their own on the road surface.
11. The testing apparatus according to claim 9 , wherein the carrying arms are detachably mounted on a pressure frame via a common central coupling piece.
12. The testing apparatus according to claim 11 , wherein the common central coupling piece comprises a homokinetic coupling.