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US 6,554,303 B2Granted
Device for measuring a steering angle and for transferring signals between a steering column and a steering rod of a motor vehicle
AssigneeValeo Schalter und Sensoren GmbH
InventorsJürgen Benz, Christian Höhler, Michael Schlegel, Jürgen Nies
Life of this patent
Estimating the term…
Abstract
The invention concerns an arrangement for carrying out steering angle or steering wheel angle measurements (α) in motor vehicles. The arrangement uses a resolver for transmission purposes. Advantageous developments concern the use of the resolver for the additional transmission of switching information in both directions and for transmission of energy using frequency-separated or time-multiplexed transmission channels.
Claims11
A device for measuring a steering angle and for transmitting signals between a steering rod and a steering column of a motor vehicle, the device comprising:
- a primary winding mounted to a stationary member of the steering column;
- a secondary winding mounted for secure rotation along with the steering rod and a steering wheel of the vehicle, said secondary winding disposed for inductive coupling to said primary winding;
- a resolver rotor winding mounted for secure rotation along with the steering rod and the steering wheel of the vehicle, said rotor winding communicating with said secondary winding;
- at least two mutually angled resolver stator windings inductively coupled to said rotor winding, said stator windings mounted to said stationary member of said steering column;
- resolver electronics electrically connected to said stator windings and to said primary winding for passing resolver excitation signals to said primary winding, and for evaluating the steering angle based on said excitation signals following inductive passage thereof into said stator windings via said rotor winding;
- a first electronic device mounted to said stationary member of the steering column and communicating with said primary winding for transmitting and receiving control signals to and from said steering wheel via said primary winding and said secondary winding;
- a second electronic device mounted on said steering wheel and communicating with said secondary winding for transmitting and receiving said control signals to and from said first electronic device via said primary windind and said secondary winding;
- and
- a first frequency filter connected between said resolver electronics and said stator windings to pass said excitation signals from said stator windings to said resolver electronics and to block passage of said control signals from said stator windings to said resolver electronics.
6 more elements
A device for measuring a steering angle and for transmitting signals between a steering rod and a steering column of a motor vehicle, the device comprising:
- a primary winding mounted to a stationary member of the steering column;
- a secondary winding mounted for secure rotation along with the steering rod and a steering wheel of the vehicle, said secondary winding disposed for inductive coupling to said primary winding;
- a resolver rotor winding mounted for secure rotation along with the steering rod and the steering wheel of the vehicle, said rotor winding communicating with said secondary winding;
- at least two mutually angled resolver stator windings inductively coupled to said rotor winding, said stator windings mounted to said stationary member of said steering column;
- resolver electronics communicating with said stator windings and with said primary winding for passing resolver excitation signals to said primary winding and for evaluating the steering angle based on said excitation signals following inductive passage thereof into said stator windings via said rotor winding;
- a first electronic device mounted to said stationary member of the steering column and communicating with said primary winding for transmitting and receiving control signals to and from said steering wheel via said primary winding and said secondary winding and for transmitting a clock signal;
- a second electronic device mounted on said steering wheel and communicating with said secondary winding for transmitting and receiving said control signals to and from said first electronic device via said primary winding and said secondary winding and for receiving said clock signal;
- and
- a gate means connected between said resolver electronics and said primary winding and between said resolver electronics and said stator windings to pass and block said excitation signals using time multiplexing, said gate means having a clock input for accepting said clock signal to control said time multiplexing.
6 more elements
Dependencies are inferred from the claim text.