What are the types of wearable sensors? All these in life are useful
Wearable electronic devices refer to textiles and clothing with integrated electronic technology or other computing devices that provide intelligent functions. These smart textiles enhance creativity, intelligence, communication skills, memory and physical senses. This definition applies not only to clothing, but also to all items that can be worn on the body. Once combined with electronic technology, such as watches, hats, shirts and glasses, they can all constitute a wide range of wearable electronic devices.
Wearable technology relies on sensors to measure how human movements provide consumers with data about themselves. With the development of sensor technology, wearable devices now have deeper measurement capabilities. Therefore, consumers have a better understanding of themselves and can change their lifestyles later.
Accelerometer
Accelerometers are sensors used in wearable devices. Their acceleration brands, such as gravity and linear, prove their sensing capabilities. At the same time, their measurement capabilities make it possible to program measurement data for different purposes. For example, a running user can access his or her maximum speed output and acceleration. In addition, the accelerometer can track sleep patterns.
Gyroscopes are also common wearable sensors. They differ from accelerometers only in recording angular acceleration. In some embodiments, an accelerometer is used to measure rotational acceleration, and some systems want to combine the two to eliminate filtering errors. The gyroscope improves the accuracy of tracking data and provides a variety of types, including gas bearings, mechanical and optical bearings.
Magnetometer
Magnetometers can be integrated to create an inertial measurement unit (IMU) with accelerometer and gyroscope. All of these sensors can have three axes, very similar to a compass, which can improve balance. Gyroscopes and accelerometers are usually used in conjunction with them, while magnetometers match them by filtering the direction of motion.
Global Positioning System (GPS)
GPS is a commonly used sensor on many devices such as smart phones and smart watches. It is used to scan and notify the user of its location. Information is sent to satellites to quantify the exact location and time. This serves as a transmitter and receiver, where information is returned to the sensor to inform the location.
Various technologies and sensors can be used to measure heart rate. One method uses capacitive sensing to idealize the electrodes (sensors) and skin, which are the two parts of a conventional capacitor. Photoplethysmography is a technique that uses light to track changes in blood flow. Fitness trackers such as Fitbit use photodiodes to rely on this approach. There is continuous green light transmitted to the wearer's skin, and this light measures the light absorption of the photodiode. This information is transmitted so that the pulse can be calculated. As the blood flowing through the user's blood increases, the more light the diode absorbs.
Usually, pressure sensors work through strain gauges. When pressure is applied to the sensor, the electrical circuit causes a change in resistance. There are many ways to observe mechanical forces (such as force) and convert them into electrical resistance-related measurements. This method of measuring pressure is achieved by building a Wheatstone bridge, which can track static or dynamic resistance changes. The sensing device will include one, two or four arms in a Wheatstone bridge configuration. The quantity depends on the equipment used (tensile and compress quantity). The sensor mechanism allows them to be integrated into external factors, such as ball contact monitoring equipment.
Integrate sensors into wearable devices
A microcontroller is a key component to enable wearable technology to operate. It is often thought of as a small computer (system on a chip), which allows the integration of the Internet of Things (IoT) with the required applications. Most importantly, it eliminates the trouble of using many electronic components to perform different functions on a single chip. It is most suitable for use in wearable technology due to its ease of programming, reprogramming, cost, size, connection with other sensors, and ability to handle complex functions (including graphic displays). The versatility allows the microcontroller to be customized to meet customer needs.
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