As the sensor might be at a slight tilt, you will need to recalibrate it after you created its new velcro attachment. Velcro is cheap, so it would be possible to simply replace it each time you wanted to switch. First, buy a good quality of Velcro. I purchased heavy-duty velcro for the job. The cost is a couple of dollars, and it can be found at an office supply store. Trim a piece of smooth Velcro to attach to the tongue of the shoe.
This piece can be larger than the other piece that you will attach to the sensor. You want to be able to position the sensor as desired on the tongue, so more velcro on the tongue is good. Trim a smaller piece of the "male" rough Velcro to attach to the sensor. The adhesive on the back of the velcro should be enough to keep it secure, especially if you bought heavy-duty velcro meant for any surface.
Trim an oblong patch of smooth "female" velcro that will fit under the laces on the tongue of your shoe, closest to the toe area. This patch should be larger, so you can experiment with the best position for the sensor once everything is in place. You want the sensor to be as level and untilted as possible. You will need to sew or otherwise attach the velcro to the tongue, as the adhesive on the back of the velcro probably won't be completely secure on the fabric of the tongue.
You will need a needle and thread and just make 4 stitches at the corners of the patch of velcro to secure it. Now simply press the sensor onto the velcro patch on the tongue of the shoe and re-lace the shoe, crossing the laces over the sensor for extra security.
Try to position the sensor so it is as untilted as possible—it should be level with the ground front to back and side to side. You will need to recalibrate the sensor for the best accuracy, as it is likely to be slightly tilted in one direction or another. If you switch this same sensor between shoes, you should recalibrate it for each shoe after each switch. If that is your plan, it would be wise to measure off a quarter-mile calibration area near where you usually walk or run and use that route for recalibration as needed.
If an outdoor track is handy, once around the inside lane is meters, which the top choice on the calibration screen. If you don't have a track, measure off a known distance near where you usually start your walking or running workout. She has a Bachelor of Science in journalism from the University of Kansas. The Nike Plus system allows runners to keep track of workout data wirelessly. Video of the Day. Getting Started. On the Run. Using the Website. High-Tech Motivation. Essentially, it combines a portable music player with a pedometer -- two devices that runners have used for years.
But the Sport Kit is considerably more advanced than an ordinary pedometer. It uses circuitry, radio waves and software to track and report on a person's workout. The Kit has two components -- a sensor and a receiver , both of which are about an inch 2. The receiver plugs into an iPod Nano. The Nano is not included, but it is required for the system to work. It provides battery power for the receiver and a user interface for the workout software.
The workout software lets people:. Older Nanos can automatically download the software using the iPod Update feature in iTunes. In addition to providing power and a user interface, the Nano tells runners how the workout is progressing. A computerized voice describes how far they've run, how quickly and how far away the destination is. The Nano's flash drive also provides storage space for workout data. When synched, the Nano transfers that data to a PC or Mac.
People can also use the site's MapIt feature to map and share their routes. We'll look at them in more detail next. The sensor detects every step a runner takes and broadcasts this information to the receiver.
The receiver routes the information to the iPod Nano, which relays it to the runner, either on the screen or through the headphones. It detects the runner's footfalls through its piezoelectric accelerometer.
Piezoelectric materials produce electrical current when they change shape, or they change shape when exposed to electricity. Piezoelectric transducers, often used in speakers, rapidly change shape when they come in contact with electrical current. Piezoelectric sensors, on the other hand, use quartz, silicon or manmade crystals that produce electricity when squeezed, moved or bent.
These generator-like crystals are often microscopic. Depending on how the crystals are cut, they usually produce an electrical charge when compressed in a specific direction or along a specific plane. For these reasons, piezoelectric sensors can be very small and very accurate. When someone is standing still or walking slowly, his feet spend more time touching the earth than in the air.
But when jogging or sprinting, his feet spend less and less time on the ground. The faster he runs, the less time his feet spend in contact with the surface under them. Because of this basic trait of walking and running, a processor can use equations to convert contact time into running speed.
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