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Distance measurement system for controlling shock absorber - feeds AC excitation voltage to one coil and uses second coil as measurement coil on piston for generating signal related to electromagnetic coupling between coils.
Distance measurement system for controlling shock absorber - feeds AC excitation voltage to one coil and uses second coil as measurement coil on piston for generating signal related to electromagnetic coupling between coils.
A coil mounted in one of two relatively movable components is supplied with an alternating electrical current. A second coil is fixed to the first component. One coil acts as a stimulation coil supplied with the a.c. current and the other as a measurement coil. An electrical signal corresp. to the relative displacement (l) of the two components is generated as a result of the variable electromagnetic coupling between the two coils (22,24). The measurement coil is connected to a magnetisable core which corresp. to the other component and which can move axially within the stimulation coil. USE/ADVANTAGE - Esp. for controlling motion of shock absorber in vehicle. Enables accurate measurement of relative displacement of two components.
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