Procedure and means for wireless measurement of the speed of sma

Details Procedure and means for wireless measurement of the speed of sma Procedure and means for wireless measurement of the speed of sma

1985-02-06

1986-05-06

Woodiel, Donald O.

Measuring and testing

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G01C 2110

Patent

active

045863741

ABSTRACT:
A procedure and apparatus for wireless measurement of the speed of a small craft, such as a surfboard or a boat, wherein the speed of the craft is measured with the aid of a speed pick-up by means of a separate measuring and transmitting device attached to the craft's bottom and in wireless fashion transmitted to a separate receiver device. In order to achieve efficient wireless measurement, the speed of the craft is detected from the voltage induced in the windings of an electric generator connected to a rotating speed measuring element and is telemetrically transmitted to the receiver device by using a magnetic field, and the electric energy required for the transmitter device is formed of the voltage induced by said electric generator.

REFERENCES:
patent: 3614760 (1971-10-01), Zimmet
patent: 4535626 (1985-08-01), Wakayama

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