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Accelerometer
The accelerometer is the most basic type of sensor that can be used to measure the direction and speed of motion. The Apple iPhone is the first smartphone to use an accelerometer that detects the direction and trajectory of the phone. In wearable devices, accelerometers can often be used to determine your steps and sleep quality. By measuring your movement speed, the accelerometer can “tell†the wearable device how far you are going, and if your wrist hasn’t been moving, it will think you are asleep.
Altimeter
Monitoring the weight change of the user is an important function of the wearable device, and the role of the altimeter is to calculate how many stairs you have climbed, how many calories you have burned, and whether you have become fat or thin. The altimeter can detect that you have climbed a few floors through atmospheric pressure changes, and combined with the number of steps you have taken, to perform more accurate calorie consumption calculations.
Gesture control sensor
This is a kind of sensor that can detect movements of various parts of the body. The user can control the equipment through some simple actions, such as waving a hand. For now, this technology is still in the development stage, but its future application may give us no small surprise.
GPS positioning
GPS is mainly used in high-end sports watches. However, some Android Wears, including Moto 360, are also equipped with GPS technology. GPS is an essential feature if you want to ensure that all your exercise data is correct. It should be noted that GPS consumes a lot of power and requires constant search for signals.
OLED
Organic light-emitting diodes (OLEDs) are generally used for display screens of wearable devices and can achieve very clear and bright display effects. In general, if you buy a wearable device that does not have this technology, it's equivalent to a waste of money. In the future, we will see some technologies that make the display more clear and bright, and even achieve 3D effects. However, for the moment, OLED is already the best display technology on wearable devices.
Optical heart rate monitoring
This device usually uses a red or green light spot on your wrist to detect your heart rate. This technology has been around for a while, but it has only been applied to wearable devices. It is mainly aimed at sports enthusiasts. Its appearance has caused us to bid farewell to the cumbersome chest strap heart rate sensors.
Do you understand the sensor of your wearable device?
The function of a wearable device depends to a large extent on what kind of sensor is built into it. Here are some of the sensors that are frequently used in wearable devices. Here are some of the sensors that will help you understand their role.