Speed sensor and head-mounted data display

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 th...

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Bibliographische Detailangaben
Hauptverfasser:	PURDY, PETER K, BEACH, KIRK W
Format:	Patent
Sprache:	eng
Schlagworte:	AMUSEMENTS ANALOGOUS ARRANGEMENTS USING OTHER WAVES ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GAMES HUMAN NECESSITIES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION ROLLER SKATES SKATES SKIS SPORTS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	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.