Mechatronic switch
firm Cherry has developed an inductive displacement sensor for shift-by-wire
gearboxes. The sensor detects the position of the gearshift.
By-wire systems are of growing importance in the industry. Fully electric
control of the vehicle’s systems could save fuel and make it possible
to integrate more safety systems, but reliability and safety must first
be proven.
Gearboxes are particularly aggressive environments. The sensor comes into
contact with metal particles, transmission oil and temperature peaks of
up to 165°C.
Cherry believes inductive sensors, which detect metallic objects without
touching them, offer advantages here. The sensor consists of a printed
circuit board with sensor coils and a metal damping element that makes
it resistant to disturbance from magnetic fields. Its laser-welded plastic
housing provides sufficient protection, it said.
© Automotive Engineer, 2007
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