Pedometer,Mileage and heart rate. Nordmende BF50

There are certainly various types of smartband, from the simplest to just counting the steps, the most complex ones, who also take into account burned calories, sleep cycles, read heart rate, and receive notifications (calls, SMS and more) from your smartphone, below a few examples(

Some features listed may not be available on all commercial models):

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Date and time

Count calories

• Pedometer

• Distance

Sleep monitoring

Heart rate (not on BF50)

Blood pressure (not on BF50)

Blood oxygenation (not on BF50)

How it works

steps counter (Pedometer)

The operating principle of the pedometer is as follows:

The bracelet has incorporated a “gyroscope” inside, when the end user wears the bracelet and starts to move, for example, the gyro vibrates (unknowingly) and generates a waveguide.

Several movements will produce different waveforms.

An algorithm identifies a specific number by identifying and recognizing the action that generates a fixed waveform;

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Plus the sw is skilled in recognizing the difference between a real step and for example lifting the arm or arm movement while driving, and the more the result will be accurate

(NOTE: These devices are not used for professional sports activities but must be considered useful for purely amateur purposes)

  

Measurement Km routes:

The operating principle of Km reading is as follows:

The distance traveled is based on the number of steps.

The average pitch multiplied by number of steps = distance.

The user fill his or her personal data into the smartphone application such as sex, age, height, weight, and more

The more data entered are accurate, the more the algorithm will be accurate and will give a better result.

This is because the average pitch is very different from person to person, and the above data are identifying the difference.

The application’s sw performs a calculation and monitors the KM paths on the bracelet screen if provided on the application itself.

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Heart Rate Measurement

Calculation of heart rate is taking into account the volume of arterial blood, taking advantage of the fact that an increase in heart rate is associated with an increase in blood volume.

The technology used by optical sensors used in heart rate FITNESS bracelets is photopletismography (PPG) that records changes in the volume of blood through the skin’s light absorption variations.

In other words, light diffuses in tissues differently based on changes in hemodynamic fluxes.

The optical sensor consists of 2 LEDs that send light waves to the body.

The FITNESS bracelet processor captures the portrayed light and translates it into the heart rate of the person.

These values are then sent to the bracelet display (if available ) and to the application installed on the smartphone, where realtime and / or statistical measurements will be highlighted during the day

Algorithms can also give more information about consumed calories, blood pressure, and blood oxygenation.

NOTE: This device is not a medical device and can not be applied for any medical function, the read values are considered for purely amateur purposes

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