Speed sensor and head-mounted data display

Details Speed sensor and head-mounted data display Speed sensor and head-mounted data display

1987-04-10

1988-07-19

Myracle, Jerry W.

Measuring and testing

Vibration

By mechanical waves

324160, G01H 500

Patent

active

047577142

ABSTRACT:
A transmitter is mounted for movement with a skier or other self-propelled sportsman and transmits ultrasonic or electromagnetic waves toward the stationary medium over which the skier or sportsman is moving. An element of the same transmitter or a separate transducer detects waves reflected from the stationary medium. A computer calculates the speed of the skier or sportsman from the Doppler shift of the reflected waves and actuates a readout unit to indicate the speed to the skier or sportsman. The readout system has a head-mounted display including a character generator and a semitransparent reflector in which the character generator is viewed so that the speed indication appears superposed over the normal background in the viewing direction.

REFERENCES:
patent: 3505878 (1970-04-01), Moll
patent: 4262537 (1981-04-01), Jander et al.
patent: 4495589 (1985-01-01), Hirzel
patent: 4546650 (1985-10-01), Cameron
Article Titled "Modulation Schemes in Low-Cost Microwave Field Sensors" Beginning at p. 612 of IEEE Transactions on Microwave Theory and Techniques, vol. MTT-31, No. 8, Aug. 1983, Avail. from Institute of Electrical and Electronics Engineers.

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