Patent ID: 8165842
Filing Date: 2012-04-24
Classification: B60C,B60T,G01P

Abstract:
1. A measuring device for measuring the speed of a vehicle running on wheels comprising, a) a first sensor for measuring the acceleration acting on the first sensor to provide a first sensor measured value, b) a second sensor for measuring the acceleration acting on the second sensor to provide a second sensor measured value, c) wherein the two sensors are arranged on the same wheel and rotate therewith, d) wherein the two sensors are arranged so that they measure accelerations, which each act perpendicularly to the axis of the wheel and which are disposed at an angle to one another, e) an evaluation device, to which the measured values of the two sensors are fed, f) wherein the evaluation device is constructed and arranged so that the evaluation device determines the acceleration of the wheel in the direction of travel of the vehicle from the measured values of the two sensors and determines the current vehicle speed therefrom, and independent of a measurement of wheel diameter, g) wherein the evaluation device is constructed and arranged so that from the measured values of the two sensors, the evaluation device also determines the angular acceleration of the wheel by means of the change of the rotational frequency and the diameter of the wheel is absolutely determined by comparing the angular acceleration with the acceleration of the wheel in the direction of travel.