Modern smartwatches and smart rings also have the ability to detect if a device is removed from the body. This feature ensures accurate data collection and prevents the device from malfunctioning.
Optical sensors:
Skin detection:
The optical sensor checks whether the device is attached to the body. When the sensor leaves the body, it detects that it has been removed from the body through changes in reflected light.
Accelerometer sensors:
Motion patterns:
Tracks wrist and finger movements, vibrations and changes in position to infer whether the device is being worn. If the device is removed and placed on a flat surface, it can determine from changes in movement that it has been removed.
Electrical impedance sensor:
Skin contact:
Some smartwatches are equipped with an electrical impedance sensor to detect contact with the skin. These sensors apply a weak electric current and measure the resistance of the skin to confirm the wearing status.
Advantages of these wear detection function
Data accuracy:
Data is only collected when the device is correctly worn, maintaining measurement accuracy.
Extended battery life:
Saves battery power by switching off unnecessary sensors when it is determined that the device is not worn.
Malfunction prevention:
Prevents malfunctions that occur when the device is disconnected.
In this way, smartwatches and smart rings use various sensors to check the wearing status, ensuring accurate data collection and efficient operation.
NB.
This text is based on asking the AI; the AI’s answers may not always be correct. Important information should be checked.
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