Measuring and testing – Speed – velocity – or acceleration – Magnetic speed measuring or mechanical speed measuring with...
Patent
1995-08-18
1997-01-14
Williams, Hezron E.
Measuring and testing
Speed, velocity, or acceleration
Magnetic speed measuring or mechanical speed measuring with...
32420712, 324236, 324202, 32420725, 324173, G01P 344, G01B 700, G01N 2772, G01R 3500
Patent
active
055941737
ABSTRACT:
A test device for vehicles has a wheel rotation speed sensor which is sensitive to magnetic fields. The test device, having a wheel rotation simulation device, contains a sensor stimulating magnet coil, which can be positioned in the magnetic field region of the sensor such that a magnetic field coupling is provided. A control unit, drives this magnet coil with an AC voltage at a frequency which determines the wheel rotation speed. This allows the performance of functional tests of components which are sensitive to wheel rotation speed while keeping the wheels stationary. In addition, a compact roller unit, which is preferably transportable, is provided in order to carry out actual wheel rotations in order to make it possible to test further components, such as the brake system or electronic transmission control. Consequently, component tests which are sensitive to wheel rotation speed can be carried out at the production location and in workshops in a manner which is flexible and optimized with respect to time and cost.
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patent: 4866376 (1989-09-01), Fujiki et al.
patent: 4972145 (1990-11-01), Wood et al.
patent: 4987366 (1991-01-01), Hamel
patent: 5375460 (1994-12-01), La Belle
Frey Gerhard
Grohmann Dieter
Hirth Thomas
Reichart Willi
Mercedes-Benz AG
Moller Richard A.
Williams Hezron E.
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