| 摘要 |
The invention can be worn by the swimmer and comprises a sensor module, preferably with a digital compass and accelerometer, preferably worn under a swim cap or attached to goggles, and a human interaction device, preferably integrated into or worn as wrist watch, for displaying laps. The sensor module and the human interaction device are in communication with each other, preferably via wireless communication. A microprocessor with software is included in either the sensor module, watch or both. The microprocessor/software interprets data from a digital compass and digital accelerometer within the sensor to determine when the swimmer has changed directions and thereby count the number of laps. The watch can then display the number of laps.
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