Smart bracelets measure sleep on the following principle:
Smart wear has its own acceleration sensor. Whether you're carrying a bracelet, watch, or ring and other wearables that fit your body and move with your body movements, they can sense your movements more accurately through the built-in acceleration sensors.
When the accelerometer sensor inside the wearable device records your movement, it can transmit your data to your phone via Bluetooth, and analyze it through the personal data provided by the user, such as age, in the cell phone APP, and finally give a statistic in the APP.
For example, if your wearable device has a heartbeat heart rate sensor, it can record your heartbeat changes while you sleep. If it has red and infrared LEDs, it can also detect blood oxygen levels. And the wearable device is independent, so it won't be affected by the people you sleep with to monitor the data.
Extended Information
A smart bracelet is a wearable smart device. Through this bracelet, users can record the daily life of exercise, sleep, part of the diet and other real-time data, and synchronize these data with cell phones, tablets, ipod touch, play a role in guiding a healthy life through data.
Smart bracelets, as a technology product that attracts a lot of attention from users, are quietly penetrating and changing people's lives with their powerful functions. Its built-in battery can last up to 10 days, the vibration motor is very practical, and the simple design style can also play a decorative role as an accessory.
This design style of smart bracelet is quite tempting for users who are used to wearing jewelry. What's more, the design style of the bracelet is very versatile.
And don't look at the tiny bracelet is not big, its function is still relatively powerful, for example, it can be said to be a high-grade pedometer, with the general pedometer of the ordinary pedometer, measuring the distance, calories, fat and other functions, but also has a sleep monitoring, high-grade waterproof, Bluetooth 4.0 data transmission, fatigue reminder and other special features.
Baidu Encyclopedia - Smart Bracelet