Vehicle control speed sensing method
First Claim
1. A method of generating an electrical signal proportional to the road speed of a vehicle comprising setting up a specific magnetic field in association with a normally unmagnetized component of the vehicle which rotates at a speed proportional to the road speed of the vehicle, the rotation of said component causing variations in said magnetic field, and sensing said variations in the magnetic field by means of a signal generating sensor including a coil, said signal generating sensor located entirely on one side of a ferromagnetic member which is disposed between said component and signal generating sensor, and amplifying the signal generating sensor output signal through a high gain amplifier.
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Abstract
A method of and apparatus for controlling the operation of a vehicle by electrical signals generated in a manner dependent on the road speed of the vehicle wherein the method comprises setting up a specific magnetic field in association with a normally unmagnetized component of the vehicle which rotates at a speed proportional to the road speed of the veicle and sensing variations in the magnetic field in a coil located on the opposite side of a ferromagnetic member of the vehicle to the component and amplifying the signal through a high gain amplifier.
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Citations
9 Claims
- 1. A method of generating an electrical signal proportional to the road speed of a vehicle comprising setting up a specific magnetic field in association with a normally unmagnetized component of the vehicle which rotates at a speed proportional to the road speed of the vehicle, the rotation of said component causing variations in said magnetic field, and sensing said variations in the magnetic field by means of a signal generating sensor including a coil, said signal generating sensor located entirely on one side of a ferromagnetic member which is disposed between said component and signal generating sensor, and amplifying the signal generating sensor output signal through a high gain amplifier.
Specification