Communications: electrical – Selective – Having indication or alarm
Patent
1979-09-06
1981-11-10
Caldwell, Sr., John W.
Communications: electrical
Selective
Having indication or alarm
731465, 200 6122, 324167, 324178, 340 62, B60C 2302, B60C 2320, G01P 3481, G01P 3488
Patent
active
043001190
ABSTRACT:
A voltage generator which provides the biasing voltage to a telemetry transmitter positioned inside the tire of a moving vehicle is disclosed. The entire transmitting system, including the antenna, is self-contained within the pneumatic tire; and, accordingly, there is no need for connecting wires of any nature to be extended outside the tire containing the invention. The invention utilizes one of several available types of voltage generators to generate a voltage in response to the rotation of the tire as the vehicle moves within a coil. As is known, as a tire rotates along a road, the tire deflects and flattens along the area which contacts the road. The transducer used in the invention generates a voltage in response to this tire deflection. The voltage thus generated are processed and utilized to provide the biasing voltage for a transmitter. Various measured parameters, such as tire pressure, temperature, inflation, and fatigue can then be provided from appropriately positioned and styled transducers and the measured telemetry signals transmitted by the transmitter to a receiver within the operator's compartment of the vehicle. The invention, therefore, is directed toward a means for providing the biasing voltage to the transmitter without the need for coupling to outside voltage sources or receiving equipment. Additionally, several transducers can be equally spaced around the parameter of the tire to thereby yield a biasing voltage which is more constant and higher in voltage than if a single voltage generator were utilized.
REFERENCES:
patent: 3708750 (1973-01-01), Bucks et al.
patent: 3750128 (1973-07-01), Sapir
patent: 3760351 (1973-09-01), Thomas
patent: 3786413 (1974-01-01), Ross et al.
patent: 3787806 (1974-01-01), Church
patent: 4048614 (1977-09-01), Shumway
patent: 4075603 (1978-02-01), Snyder et al.
patent: 4117452 (1978-09-01), Snyder et al.
patent: 4160234 (1979-07-01), Karbo et al.
patent: 4210898 (1980-07-01), Betts
Caldwell Sr. John W.
Facet Enterprises Inc.
Nowicki Joseph E.
VanOphem Remy J.
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