In our world of increasing health awareness, there are actually sports models that use a variety of smart devices. Adding a pedometer to your mobile phone – a compact portable electronic device that you carry almost anywhere, is an obvious application. Users can measure how far they have gone and how much calories they have consumed. There are indeed several phones with this feature in the market today.
Although the accelerometer can easily calculate the number of steps to walk, the step size varies from person to person (approximately ±30% difference) and the test result also depends on the walking speed of the person (usually the error is greater than ±25%), so it cannot Accurately detect the number of walking steps within the distance traveled. However, the acceleration experienced by the acceleration sensor actually measuring the mobile phone (in the pocket or on the belt) makes a very good estimate of the distance traveled. Algorithms in the public domain ensure that the accuracy of the step counter is better than 95%, and the accuracy of the walking distance is better than 90% (see ADI's note AN-602 for this algorithm).
Pedometers require an accelerometer with very low power consumption (because the accelerometer is always on) and a measurement range of at least ±2 g.
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