| 摘要 |
<p>This invention is an electronic device for monitoring the activity of a wearer, and his walking speed as well as the distance traversed in a selected time interval. The invention comprises a magnet (30) strapped to a leg of a person or a shoe of a pair, a Hall effect sensor (20) with an associated electronic processing unit including an amplifying circuit (60), an A/D converter (70), a stored program device means (80), a memory storage unit (90), a D/A converter (100), and an output unit (120). Since the Hall output voltage produced by the Hall effect sensor (20) depends on its distance from the magnet (30), the step length can be computed each time a person moves forward. As the magnet (30), and the sensor (20) each pass each other several times, a series of these Hall output voltages produced are converted to binary data. A stored program device means is used to analyze the data to yield information about the distance traversed, the varying speed of the motion between the magnet (30), and the sensor (20). The data encoded in an analog radio wave transmitted through the antenna (130) allow for distant monitoring of the gait activity of the person using this invention. A simplified electronic circuit activates a plurality of display elements whenever there is a relative movement between the magnet (30), and the sensor (20). By mounting a plurality of magnetic strips (30) on an athletic field track, the activity of a runner wearing a magnetic sensitive sensor (20) together with its electronic computing circuit can be monitored.</p> |
