What technology does the smart bracelet rely on to count steps?
Smart bracelets rely on sensors to count steps, such as:
1. Three-dimensional rhythmic motion state sensor (three-axis acceleration sensor)
This This kind of sensor can sense motion conditions such as acceleration or vibration in different directions through a capacitive accelerometer.
Three-dimensional rhythmic motion state sensors are divided into three-axis and six-axis sensors. Three-axis sensors generally record our data when we swing our arms, while six-axis sensors record data through walking, running, and riding. The best data recording and accuracy for lifting sports such as driving and climbing stairs.
2. Green light photoelectric measurement method (photoelectric effect)
The green light photoelectric measurement method is composed of two green wavelength luminous LEDs and a photosensitive sensor, located on the back of the heart rate monitor .
The principle is based on the density change of blood in the blood vessels of the arm when it pulses, which causes changes in light transmittance. The light-emitting LED emits green wavelength light waves, and the photosensitive sensor can receive the reflected light from the arm skin and sense changes in light field intensity and convert it into heart rate. It can continuously measure heart rate, calculate average heart rate, and record maximum heart rate.
The core technology of Huawei 50 waterproof smart bracelet
On May 26, Huawei’s smart wearable series ushered in another blockbuster product-Huawei Sports Bracelet at the HUAWEInova2 launch conference Officially unveiled, He Gang, President of Huawei's consumer business mobile phone product line, explained the product on site. This sports bracelet adheres to the high quality made by Huawei, with a stylish appearance and rich colors, available in five colors: black, red, blue, orange, and green. As Huawei's first sports bracelet, it has 50-meter waterproof, heart rate monitoring, sleep monitoring and other functions. The GPS version is equipped with an independent GPS that can record movement tracks. The above functional design fully meets the needs of young people in different scenarios such as running and swimming. It is reported that Huawei Sports Band will be officially launched on July 14, with the standard version and GPS version priced at 298 yuan and 388 yuan respectively.
Huawei’s first sports bracelet is officially unveiled
Fashionable appearance: purely handmade, colors and textures are all from famous designers
With the development of smart wearable devices With rapid development, application scenarios are becoming more and more abundant. Based on this, Huawei has spared no effort in the design of smart bracelets. In terms of appearance design, Huawei adopts the "natural and harmonious" design concept, combining square parallel lines with standard arcs, while bringing a strong sense of technology, using precision processing technology, and making full use of the internal space structure to integrate Huawei's sports The bracelet is made to be exquisite and durable.
In terms of the body, each bracelet is handmade by 9 craftsmen and 9 times of repeated polishing. The surface of the bracelet is as shiny and smooth as silk. Huawei's designers from the FashionDesign family also worked their magic, customizing the texture and color matching for this product based on the latest fashion trends. The texture arrangement of the bracelet is inspired by Italian perforated leather, and the color adopts French high-end gray tones. Highlight the wearer's style and temperament. The unique design, fine workmanship and fashionable and colorful colors make Huawei sports bracelets both style and practical, meeting the needs of today's young people who pursue individuality.
Powerful waterproof function: 50 meters waterproof to swim at will
To create this wrist art, Huawei used complex and precise processing techniques. The bottom case, including the heart rate measurement device, is made in one go through two-color injection molding, ensuring a seamless connection between the wrist contact surfaces. The face shell has also been welded by high-frequency ultrasonic welding, and the overall bracelet is smooth, delicate and impeccable. High-end process technology makes the reliability and waterproof level of Huawei Sports Band reach the industry-leading 50M waterproof level. This means that the Huawei Sports Band can be worn in swimming and hand-washing scenarios. Under normal circumstances, it does not need to be taken off for all-day use. Even after swimming in sea water, it only needs to be washed and wiped clean with water. For young people who love water sports, this bracelet will be the finishing touch to a swimsuit look.
Huawei Sports Band is 50M waterproof
Independent GPS+ running data analysis and expert one-click separation
In order to allow users to record movement tracks during running At the same time, it can get rid of the shackles of mobile phones. Huawei sports bracelet has specially launched a GPS version. The built-in GPS allows Huawei sports bracelets to not only achieve independent GPS positioning and record movement trajectories, but also view data such as pace and distance in real time.
The heart rate monitoring function of the bracelet is another excellent assistant for running. The bracelet uses an innovative PPG module, and its 24-hour heart rate tracking function is comparable to that of a heart rate belt. During exercise, heart rate monitoring can not only remind users of exercise heart rate zones and understand exercise status, but also receive heart rate warnings when the heart rate is too fast to ensure exercise safety.
Huawei Sports has a built-in independent GPS version
Full screen coverage for breathing and sleeping, double upgrade of battery life
Huawei Sports Band also adopts many health functions An industry-leading technology. The bracelet can guide users to perform breathing exercises, relax tense muscles, release life stress, and make the mood comfortable and calm. At the same time, Huawei's HUAWEI Trusleep, certified by the Harvard Medical School CDB Center, has been certified by the Harvard Medical School CDB Center. 觥
The large screen equipped with Huawei sports bracelet not only makes the bracelet more convenient to operate, but also allows the bracelet to display more information during caller ID and message synchronization. Along with the large screen, the battery life of Huawei's sports bracelet has also been improved. It can be used normally for about 21 days on a single charge, reaching the leading level in the industry.
Huawei sports bracelet can be used normally for about 21 days on a single charge
Fashionable sports accessories: stunning appearance and powerful functions
Not long ago, Huawei released HUAWEI WATCH 2, which was widely received It has received favorable reviews. Its mobile phone information synchronization, speed monitoring, continuous heart rate monitoring and other functions are favored by consumers. Huawei Sports Band and HUAWEI WATCH2 are in the same category and have similar information synchronization and heart rate monitoring functions. For young people who chase trends, like sports, and pay attention to health, such a bracelet with stunning appearance, powerful functions, and excellent cost performance is undoubtedly the most fashionable sports accessory worth buying this summer.
Huawei Sports Band will be fully sold on July 14 in Huawei Mall and other major e-commerce platforms, Huawei authorized experience stores and other authorized retailer stores.
The smart bracelet applies Internet of Things technologies including: sensing technology, cloud management technology, and big data analysis technology. For Internet of Things technology, please refer to the Internet of Things platform-Electronic Internet of Things.
How does a smart bracelet work?
As a whirlwind of smart wearable devices blows through the IT industry, Google Glass and smart watches have continued to receive exposure and high attention At this time, smart bracelets seem to be popular. Many people must have questions. When they see these smart watches and smart bracelets on the market, they say they can detect motion status and sleep status through Bluetooth. What is its working principle? How is it implemented? I will explain it in detail below. Introducing to you.
What is the working principle of the smart bracelet 1
1. The principle of the smart bracelet
The motion monitoring function of the smart bracelet is realized through the gravity acceleration sensor. Gravity sensors are already a very mature technology and have been used in mobile phones for a long time. For example, the screen flip function of smartphones is now implemented through sensors. The sensor obtains some basic data by judging people's movements, and then combines it with the basic information of personal physical signs input by the user before, and based on some specific algorithms, obtains personalized monitoring data for the individual, such as the number of steps, distance, and calories burned. , thereby judging the frequency and intensity of exercise. Since each person's exercise has different effects depending on their physical signs, users need to enter their gender, age, height, weight and other information in the APP before using the bracelet for monitoring. The information will be automatically synchronized to the bracelet through The sensor monitors sports actions, and finally realizes the function of motion monitoring through a specific algorithm.
Sleep monitoring is also enabled by the same sensor technology. Human sleep can be divided into five stages according to brain wave signals: falling asleep, light sleep, deep sleep, deep sleep, and rapid eye movement (REM). People's brain waves can change rapidly at different stages. Interestingly, the gravity acceleration sensor does not have the function of directly detecting brain waves, so it uses the amplitude and frequency of people's movements during sleep as a standard to measure sleep. Regardless of the stage of sleep, the smart alarm clock function of the bracelet will wake the user up during the rapid eye movement period. "Because sleepers during the rapid eye movement period will have high-frequency and low-amplitude brain waves similar to those when awake, it is easier to wake up. If awakened at this time, the sleeper will feel refreshed and have a good sleep effect.
”
2. What is the working principle of the smart bracelet?
Heart rate: using two electrodes (ECG principle), you can check online for ready-made solutions;
Respiration rate: You can use a three-dimensional acceleration sensor (vibration principle), but there is no ready-made solution. You need to make a model yourself. There is a lot of vibration clutter, and you need a better filtering algorithm. Once done, it is quite promising;
Blood pressure, I don’t know how to use it in such a simple way
Difficulty: But the difficulty of this product is how to use a simple product to realize multiple data. Collect without disturbing the user? The data here involves blood pressure, blood sugar, blood oxygen, pulse and other data. Our normal measurement process for these data is to draw blood to measure blood sugar and blood oxygen content, measure body temperature with a thermometer, and measure blood pressure by pressing blood vessels. < /p>
This problem is actually a problem faced by many smart devices nowadays. Sports bracelets are still stuck in the function of obtaining position information changes through gyroscopes and analyzing various complex human body states from exercise to sleep. The accuracy of the data Limited.
Imagination:
1. Detect the oxygen content of human red blood cells through the principle of reflection
2. Calculate the pulse conduction rate. The time difference between ECG detection and pulse detection is used to obtain blood pressure information.
3. Obtain more accurate human body temperature values ??through temperature sensing on both sides.
4. Through metabolic heat integration. Method, after detecting metabolic heat, blood oxygen saturation, and blood flow rate, the blood sugar concentration value is calculated.
The biggest breakthrough of this principle is to achieve non-invasive acquisition of physical sign data and no interference with people. Small. The blood pressure, blood sugar, and body temperature changes will be very helpful for people with high blood pressure, diabetes, and pregnant women to detect their own body data. Guo Hui said that this principle has passed theoretical certification and is planning hardware design. He also hopes that there will be more investment to promote the development of the project. Most of the bottlenecks in smart devices now are information acquisition. If Guo Hui's team can realize this idea, it will not be a problem to make bracelets and watches.
The core is a 3-axis gravity acceleration sensor. The output value is converted into the amount of activity through an algorithm. The basic principle is to calculate the amount of work done to overcome gravity and inertia, so it is necessary to bring in the amount of body weight to participate in the calculation. Nowadays, all the hands Rings, trackers, etc., no matter the brand or model, the user's weight is set by the external input during synchronization. For formulas and other information, you can refer to some sports professional papers. In addition, the bracelet has a special feature that it can only stay on. It is on one side of the hand, so the algorithm is different from the ordinary tracker that the user will wear at the center of body weight. It needs to be corrected by a special algorithm. The specific algorithm is a commercial secret.
Basically, it is a three-axis accelerometer, and then uses an algorithm to determine the number of steps taken by a person. The algorithm is the core, so I can’t tell you how the smart bracelet works2
1. Introduction to smart bracelets
A smart bracelet is a wearable smart device. Through this bracelet, users can record real-time data such as exercise, sleep and diet in daily life, and synchronize these data with iOS or Android devices to guide healthy life through data. The smart bracelets that have attracted attention mainly include Nike+Fuelband, Fitbit Flex, Jawbone Up2 and several domestic brand products that have followed suit.
"GoogleGlass" is not yet on sale, but the "smart bracelet" is here. While traditional e-commerce companies are still trying to figure out whether the price of a certain home appliance is higher or lower, Yixun.com, a subsidiary of Tencent e-commerce, has taken a different approach and shifted its focus to the joint development and introduction of high-tech products. Yesterday, the smart bracelet "Jawboneup" was exclusively launched in China, becoming the first domestic e-commerce company to officially enter the Internet "wearable smart device" market [.
It is reported that the "Jawboneup" smart bracelet launched on this website is a very popular wearable smart device on the market. It has been widely welcomed by white-collar consumers.
2. The structure of the smart bracelet
The main body of the smart bracelet is generally made of medical rubber or memory rubber.
Natural and non-toxic, the appearance design is high-end, fashionable and elegant. It not only functions as a sports and health secretary, but also functions as a fashion accessory. The appearance has a streamlined garland and various colors.
The two ends are equipped with silver-coated metal caps, which are very suitable for wearing, which also makes it different from traditional bracelets with locks or buttons.
The smart bracelet has a built-in lithium battery with a battery life of up to 10 days, a vibration motor and a motion-sensing accelerometer. The small silver cap at the end of the bracelet is a button for changing settings, and the other section is a 3.5mm plug for connecting to a mobile phone.
3. Functions of smart bracelets
The design style of smart bracelets is quite tempting for users who are accustomed to wearing jewelry. More importantly, the design of the bracelet is versatile. Moreover, despite the small size of the small bracelet, its functions are still relatively powerful. For example, it can be said to be a high-end pedometer, which has the functions of ordinary pedometers such as counting steps, measuring distance, calories, fat, etc. It also has special functions such as sleep monitoring, high-end waterproofing, Bluetooth 4.0 data transmission, and fatigue reminder.
The built-in battery can last for 10 days, the vibration motor is very practical, and the simple design style can also be used as a decorative accessory.
Take sleep as an example. Set Jawboneup to sleep mode before going to bed. When you get up the next day, synchronize it with your iPhone device to see your sleep time, wake time, deep sleep/ Light sleep, overall sleep quality and other information. For people who want to lose weight and keep fit, the "JawboneUP" smart bracelet is a responsible personal trainer that can tell you your daily exercise path, calories burned and calories taken in. You can also set exercise goals, such as how many steps to take, how many calories to burn, etc., and the exercise completion rate will be displayed in real time. Exercise and weight loss can be quantified, which is great news for people who cannot persist. The smart bracelet has a high-end waterproof function and can be worn to swim in shallow seas or rivers within 10 meters. It overcomes the shortcomings of traditional pedometers that cannot track swimming movements and is more widely used.
The smart bracelet also has social network sharing functions. For example, users can share their sleep quality, diet and exercise status, and mood records by binding to Facebook or Twitter. It is also a protector for the elderly. Through the built-in GPS connector, it can notify relevant hospitals or family members of the physical condition and location at any time.
4. How the smart bracelet works
It is made of one meter deep waterproof rubber material covering the whole body. It is said to be skin-friendly and very comfortable to wear. Available in a variety of colors, S, M, and L sizes also meet the needs of different groups of people. The 3.5mm headphone jack can be used not only for charging, but also for data synchronization with your phone. It can last for 10 days on a full charge. The two-section silver-coated metal cap and the Jawbone logo, along with the flashing breathing lights in different states, make the entire bracelet look very fashionable and exquisite.
Specially configured mobile application, by connecting to iPhone, you can easily view your daily exercise data (including exercise time, number of kilometers and steps walked, number of calories burned, etc.) and sleep data (total Sleeping time, waking time, number of night wake-ups, etc.), dietary data can also be input through the mobile phone, and the bracelet will provide nutritional information based on the type of food for users to refer to and adjust their eating habits.
The application development of smart bracelets reflects the application of data collection technology
The application development of smart health bracelets reflects the application of "sensor" data collection technology; smart bracelets The smart bracelet is a wearable smart device; through the smart bracelet, users can record real-time data such as exercise, sleep, and some diet in daily life, and synchronize these data with their mobile phones to guide healthy living through data. .
The application development of smart health bracelets reflects the application of "sensor" data collection technology.
Application of smart sports bracelets
Introduction: With the development of digital technology, digital has been integrated into us. With the advent of the intelligent era, the application of intelligent electronic products in people's lives has become more and more popular. Intelligent products are also constantly updated with the continuous updating of technology and the growing needs of users. After smart wearable devices entered people's field of vision, smart sports bracelets were widely loved by consumers because of their simple operation and easy portability.
The following is a popular science about the application of smart sports bracelets?
Applications of smart sports bracelets
The specific applications of smart sports bracelets are reflected in the following aspects:
1. The smart bracelet is not only a smart device, but also an attractive accessory for users who are accustomed to wearing jewelry.
2. Pedometer. The smart bracelet is a high-end pedometer that not only accurately counts the user's steps through vibration sensing, but also accurately measures the user's distance, calories burned, fat mass, etc.
3. Alarm clock. The smart bracelet can not only function as a general alarm clock, but can also remind users to take a break by setting fatigue time.
4. Remote control. Remote control can realize the function of remote control through smart bracelet with the support of software. Due to the multi-brand collaboration involved, this feature has not yet generally appeared on smart bracelets.
5. Through its built-in GPS connector, the user's physical condition and location information can be sent to family members or hospitals at any time. This function is very useful for elderly users.
6. The smart bracelet is waterproof. You don’t have to worry about it being damaged even if you wear it for swimming. However, the pedometer is not waterproof.
7. Health management. In this regard, the smart bracelet is more like a personal health steward. Whether it is daily step counting, sleep monitoring, or exercise heart rate monitoring, the smart bracelet accurately monitors these data through the device to protect the user's health.
8. Answer the phone. Answering calls is a standard feature of smart watches. You can answer calls without taking your phone out of your pocket, which can come in handy in extremely crowded places. At present, smart bracelets with the function of answering calls are relatively rare.
9. Sleep monitoring. Users can set the smart bracelet to sleep mode before going to bed, and synchronize it with the smartphone after getting up, which can intuitively display the user's sleeping time, waking time, or deep sleep/light sleep and overall sleep. quality and other information.
With the continuous upgrading of technology and the increasingly diverse and personalized needs of users, it is believed that the functions of smart sports bracelets will continue to be enriched and more powerful in the future, and they will be able to meet the needs of users. growing demand.