Miniature sports radar speed measuring device
US5864061A · kind A · utility
Inventor
Key dates
| Filing date | Feb 5, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Feb 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/88
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A sensor is provided for measuring the speed of a moving sports object, for example a ball such as a baseball or softball. The sensor is operable over a short range and is preferably mounted in close proximity to the path of the moving object. For measuring the speed of a ball, the sensor is preferably mounted on or in a ball glove or is otherwise mounted on the forearm of a person catching or otherwise receiving or interacting with the ball, for example, by wearing the sensor on such person's wrist. The sensor measures the speed of a ball about to be caught, for example, and displays the speed of the ball to the catching player. The sensor of the preferred embodiment utilizes CW Doppler radar in the form of a microwave radio frequency transmitter and receiver that has a single-transistor integrated antenna/oscillator. A simple, low cost unit having a low radiation and low energy consumption transmitter, receiver and signal processor, is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.