Apparatus for measurement of torque on a rotating shaft
First Claim
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1. A combination comprising:
- utilization apparatus;
first means, including an electrical power oscillator, for transmitting electrical power from a first location towards a second location;
second means, at said second location, responsive to electrical power received from said first means, for operating said utilization apparatus;
third means coupled to said utilization apparatus for generating a signal indicative of performance thereat, and for transmitting said signal to said first means via said second means;
with said first means being stationary in operation, and with said second means being mechanically rotational in operation;
with said second means being devoid of any source of operating power thereon; and
with there being an absence of mechanical interconnection between said first means and said second means;
wherein said first means also includes a fixed electrical coil;
wherein said second means includes an electrical coil on a rotating mechanical shaft; and
wherein said fixed electrical coil and said rotating electrical coil are both tuned to form a critically-coupled transformer resonating at the frequency of said oscillator.
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Abstract
Apparatus for measuring the horsepower transmitted by the drive shaft of an automotive vehicle, by determining the torque on the shaft through the measurement of the resistance of an included strain gauge, yet without the need for a power supply, such as a battery, being on the rotating shaft itself.
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Citations
7 Claims
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1. A combination comprising:
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utilization apparatus; first means, including an electrical power oscillator, for transmitting electrical power from a first location towards a second location; second means, at said second location, responsive to electrical power received from said first means, for operating said utilization apparatus; third means coupled to said utilization apparatus for generating a signal indicative of performance thereat, and for transmitting said signal to said first means via said second means; with said first means being stationary in operation, and with said second means being mechanically rotational in operation; with said second means being devoid of any source of operating power thereon; and with there being an absence of mechanical interconnection between said first means and said second means; wherein said first means also includes a fixed electrical coil; wherein said second means includes an electrical coil on a rotating mechanical shaft; and wherein said fixed electrical coil and said rotating electrical coil are both tuned to form a critically-coupled transformer resonating at the frequency of said oscillator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification