Apparatus and method for sensing unbalance force and...

Details Apparatus and method for sensing unbalance force and... Apparatus and method for sensing unbalance force and...

G - Physics

01

M

G01M 17/00 (2006.01)

Patent

CA 2067293

-14- ABSTRACT OF THE DISCLOSURE A force sensing apparatus and method in a vehicle wheel balanced is disclosed which in one embodiment includes use of a voltage controlled oscillator connected to drive a piezoelectric crystal at an oscillation frequency which is compared in phase to a frequency generated by the wheel balanced spin shaft encoder. When unbalance force imposed changes occur in the crystal oscillation frequency, an unbalance output is provided by the comparison which contains the unbalance force magnitude and angular orientation information. The unbalance output is processed to provide operator indications for facilitating application of counterweights to the vehicle wheel.

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