At present, the principle of intelligent wristband sleep monitoring is: analyzing the sleep state through a body motion recorder. Simply put, there is a sensor on the smart bracelet that measures the quality of sleep based on the amplitude and frequency of the wrist movement during sleep. (Note: The body motion recorder can detect small movements to determine whether it is in awake, shallow sleep or deep sleep. As for how to determine the user’s state, it depends on the preset parameters of the bracelet, the bracelet will be pre- Several trigger conditions are set to determine whether the user enters the sleep state. When the monitoring data of the bracelet matches the preset data, the bracelet will determine that the user has entered the corresponding mode.
But how do you judge that the user has entered the sleep stage?
Sleep monitoring monitors the movements of the person through the body motion recorder, and performs the cumulative calculation in the system calculation mode. The total value is recorded every 2 minutes, and the posture data is recorded at the same time, and the sleep state is judged by calculation. When you are deeply asleep, your muscles will relax, and your limbs will not produce large movements or even movements. When you sleep lightly, your body will produce some slight movement.
The principle of the smart bracelet is to monitor the state of movement of the wrist and slowly change from the light motion mode to the immobile state at night to judge that it is in a state of deep sleep. Here, the calculation engine is used, and then according to each person’s sleep cycle, The deep sleep time is calculated by judging the end and start of each sleep cycle.