Measuring platform for weight and brake system monitoring
First Claim
1. A measuring platform to be recessed in road surfaces comprising a base plate and a cover plate, between the base plate and the cover plate at least two supporting points spaced over the width of the cover plate in the direction of travel and a number of supporting points arranged over the platform length transverse to the roadway, and at least two spaced-apart piezoelectric crystal plates separating the base plate and the coverplate at the two supporting points spaced in the direction of travel and measuring a shear effect when the speed of a wheel changes obtaining a shear force component between the two plates.
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Accused Products
Abstract
The measuring platform according to the invention, for recessing into road surfaces, consists of a base plate and cover plate supported in cross section on two supporting points fitted with piezoelectric shear crystals, enabling the shear force of an overrunning wheel to be measured. If the supporting points are equipped with piezoelectric pressure crystals, it is possible to measure the axle load with the same platform arrangement. This offers new possibilities, especially on or after gradients, for verifying the functional efficiency of braking and ABS systems and taking out of service vehicles with defective braking equipment.
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Citations
18 Claims
- 1. A measuring platform to be recessed in road surfaces comprising a base plate and a cover plate, between the base plate and the cover plate at least two supporting points spaced over the width of the cover plate in the direction of travel and a number of supporting points arranged over the platform length transverse to the roadway, and at least two spaced-apart piezoelectric crystal plates separating the base plate and the coverplate at the two supporting points spaced in the direction of travel and measuring a shear effect when the speed of a wheel changes obtaining a shear force component between the two plates.
Specification