The three most valuable technologies in the field of wearable devices

In recent years, the field of wearable devices has become a dazzling array of products, and a variety of cool products have followed. People seem to have formed a habit of paying attention to them. However, many people know that wearable devices have a variety of functions, but there are few techniques for them. Be aware that these features can be built and even enriched, and strong technical support behind them is essential. Today, let Xiaobian lead everyone to familiarize themselves with the three most valuable technologies in the field of smart wearable devices.

First, wireless transmission technology

Wi-Fi is one of the most widely used technologies in today's smart devices and has good prospects for development. The protocol used by Wi-Fi has evolved to 802.11ac, with theoretical transmission speeds of up to 1 Gbps.

Experts predict that by 2017, the sales of wearable devices will be close to 70 million units. However, with the continuous improvement of the hardware level, the appearance of the wearable device is more compact and light, and the processing chip is gradually developing toward high performance and low power consumption. In this case, the mobile smart device has become a hub for connecting everything. Therefore, connecting wearables to a powerful smartphone or tablet for data processing and cloud sharing is especially important.

Bluetooth is also a relatively common wireless connection technology that supports communication over short distances with a data rate of 1 Mbps. The biggest advantage of Bluetooth technology is that it takes up almost no space and can be easily integrated into a variety of wearable devices without stressing the design of the appearance and structure. With its low cost and efficient transmission capacity, it has transformed the market demand for wearable products from a niche to a mainstream, from a new wave to a practical one.

In addition, wireless transmission also has a non-contact identification NFC technology, namely near field communication. NFC technology is easier to operate and more efficient than Bluetooth. In the era of cloud computing, the data generated by people's daily life, social entertainment, etc. will pass through the medium of smart phones, and NFC has become a place to replace the sensor cards such as bus cards, bank cards, and access cards. Not only mobile phones, but nowadays many smart wearables are vying to integrate with NFC technology because it has two popular features that are popular with people – mobile payment and data sharing at close range.

In general, wireless technology has become an indispensable part of the current smart wear field. In the future, as long as there is no conflict in integration, multiple wireless technologies will coexist for a long time, because each technology has its best use scenario. However, relatively speaking, Bluetooth Smart (low-power Bluetooth technology above version 4.0) and WiFi will have an advantage in wearable applications.

Second, sensing technology

The data on the wearable device is not only derived from the touch screen or other input devices, but also the function of automatic acquisition and monitoring to obtain the data of the user activity and the data generated by the changes of the external environment. Therefore, the most important of these is the sensing technology.

Take the most common sports bracelets, initially using only accelerometers to measure steps, but as a variety of sensors continue to implant, it also has a lot of features.

For example, GPS technology can locate satellites, record the user's geographic location, motion trajectories, etc. One of the biggest selling points of the sports bracelet is the health monitoring function, so the application of the optical heart rate sensor is more and more extensive. Using LED light to illuminate the skin, the blood absorbs the fluctuations of the light to judge the user's heart rate level, and achieve more accurate data analysis; however, the bioelectrical impedance sensor function is more detailed and comprehensive, and it can realize blood flow through the biological impedance itself. Monitored and converted to specific heart rate, respiration rate, and skin reaction index; the skin electrical response sensor is an advanced biosensor that is typically loaded on equipment that requires detection of sweat. Since human skin is a kind of conductor, when it starts to sweat, the skin electrical response sensor starts to measure, which can detect the movement from other parameters.

Obviously, with the help of sensors, wearable devices can further understand the user's physiological functions, master deeper physical changes, and analyze the collected data into valuable content that can lead healthy life.

Third, human-computer interaction technology

Since people wear these devices every day, one of the smart things they must have is to interact with the user. This not only allows the user to better control the device, but also makes the device more user-friendly. The way of human-computer interaction involves many different forms. The main interactive technologies can be easily divided into the following four categories:

1. Eye tracking and interactive technology

Eye tracking technology usually has three tracking methods: one is to track the changes according to the characteristics of the eyeball and the periphery of the eyeball, the other is to track according to the change of the iris angle, and the third is to actively project the infrared beam and other beams to the iris to extract features. This technology is used in the development of smart glasses. When the person's eyes look in different directions, the eyes will have subtle changes. These changes will produce extractable features. The computer extracts these features through image capture or scanning to track eye changes in real time and predict the user's status and needs. And responding to the purpose of controlling the device with the eye.

2. Voice interaction technology

Voice interaction can be said to be one of the most direct interaction technologies between human-computer interaction in the era of wearable devices. The rise of a new generation of voice interactions has just integrated the voice with the intelligent terminal and the cloud back-end, allowing human voice to communicate with the program world by means of data, and to achieve the purpose of controlling and understanding the user's intention. The front-end uses voice technology, focusing on the integration of web search, knowledge calculation, database, question and answer recommendations and other technologies in the background, making up for the limitations of past voice technology relying solely on front-end commands.

3. Somatosensory interaction technology

Somatosensory interaction technology refers to the use of computer graphics and other techniques to identify a person's body language and translate it into computer-readable operating commands to operate the device. It is a human-computer interaction technology driven by the trend of wearable devices. Among them, the gesture interaction is the most representative, and the shape and displacement of the various sensors are continuously collected, and the modeling is completed at intervals to form a sequence frame of model information, and then these information sequences are converted into corresponding instructions. To control some operations. With the maturity of various technologies and the development of sensors, gesture recognition has entered the usability stage, and various products and solutions have begun to emerge.

4.AR/MR interaction technology

Augmented Reality (AR) refers to the provision of informational and entertaining coverage on top of the real environment, such as overlaying graphics, text, sound and hypertext in real-world environments, providing additional information to complete reminders, reminders, markings, Auxiliary functions such as annotations and explanations are a combination of virtual environment and real environment. AR/MR technology provides a new application method for wearable device devices, constructing a new virtual screen between human and machine, and implementing scene interaction by means of virtual screen. This is one of the most widely used interactive technologies in smart glasses, immersive devices, and somatosensory games.

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