Smart bracelet solution development

In recent years, with the gradual emergence of the value of various embedded intelligent devices, my country's intelligent industry has entered a stage of rapid development. The demand for intelligence shows a diversified trend, and smart bracelets are a representative product. It is mainly used to monitor exercise, monitor sleep and intelligently arrange people's lifestyles.

Through the bracelet, users can record their movements through data and synchronize data with tablets to guide a healthy life. The simple design of the smart bracelet is suitable for wearing jewelry. Its built-in battery life can reach more than 10 days. It is more practical than other smart clothing products and plays an important role in your own health.

1. Current status of smart bracelets

With the rapid development of modern science and technology, the demand for smart devices is constantly increasing for people. Nowadays, the term smart bracelet is very popular in all walks of life. Whether it is business elites, energetic student groups, or middle-aged and elderly people who pay attention to health, they will all be supporters of smart bracelets.

With the continuous development of the economy, social competition has become more and more fierce, and the pressure for survival has increased. More and more people have begun to pay attention to their physical health. Therefore, health-related knowledge has also become the focus of people. In this case, the medical level is also constantly improving, but because people still pay attention to health only when they are unwell or have a disease, so in this At this time, a device that can monitor people's own physical conditions is needed to supervise and help people, so smart bracelets appeared. In the environment of the big data era, smart bracelets are also a product of this era. They better integrate personal living habits, detect personal basic conditions in real time, and give corresponding opinions. Smart bracelets can not only monitor personal health conditions and adjust personal living habits and life patterns in a timely manner, but can also help users monitor physical conditions and pre-control diseases.

2. Application of smart bracelet solutions in medical treatment

In addition to bringing more health benefits to the public, smart bracelets are also good news for many middle-aged and elderly people. Smart bracelets can monitor and track users' sleep status, normal activities, heart rate, body temperature and other information through smartphone applications. Its functions can be simply described in several aspects: Nowadays, many people are in a sub-healthy state, especially when going to work. For ethnic groups, due to long-term sitting, lack of exercise, and irregular living habits, their health requires more attention. Smart bracelets can track the user's normal physiological conditions or some activities, such as blood pressure, blood sugar, walking distance, heart rate, calorie consumption, etc., to test the health of the human body. In addition, smart bracelets can also monitor sleep and help users understand their sleep conditions and manage their health.

Many people treat illness with a procrastinating attitude, delaying going to the hospital, and sometimes turning a minor illness into a disease. Not only will it cost more money, but the health will also decline as a result. In fact, many diseases are easy to control in the early stages of treatment. If the disease is not detected in time in the early stages, it may require paying a higher price. Therefore, using a smart bracelet can help you detect the disease in its early stages as soon as possible. Nowadays, you will encounter various difficulties when going to the hospital to see a doctor. You need to get up early in advance to queue up to register, go to the hospital, collect medicines, pay bills, and a series of other tasks, which also take a long time. In order to save time, smart bracelets can help us complete the entire tracking and management process of diseases, saving us time and reducing the cost of medical expenses. The smart bracelet can also send monitoring information to the hospital's medical terminal system, so that health information can be updated in real time.

The rapid development of science and technology has brought faster and faster updates to the development of smart bracelets. There are many wearable devices on the market, including an endless stream of smart bracelets. Although these devices are powerful and can help users monitor their physical conditions, in the medical field, they can only be used as a carrier to provide users with some data. , helping users understand their health status through data and providing information to users. It can only help users alleviate or improve their physical condition, but it cannot cure the disease.

3. The relationship between smart bracelets and sports

With the rapid development of the times and the continuous advancement of technology, the craze of smart bracelets has also arrived, and it can slowly integrate sports. This fusion is the fusion of sports and technology, while improving the quality of sports. The development of smart bracelets will make sports develop in the direction of network, portability, modernity, intelligence, etc. Their combination will also lead people to move towards a healthier life.

Nowadays, people engage in physical activities to cultivate a healthy lifestyle, but many people have no idea how much exercise they do, but inappropriate exercise can affect their health. After exercising, the body will appear in a negative state, and people will gradually stay away from exercise, which will have an impact on the continued development of exercise. With the widespread application of smart bracelets, we can accurately understand their movements during exercise and make corresponding adjustments. This will change people's negative impact on sports and promote the development of sports.

At the same time, when monitoring movement, the gyroscope, speedometer, pressure sensor and compass of the smart bracelet determine the user's activity by monitoring arm vibration and amplitude. Compared with health monitoring, smart bracelet exercise monitoring technology is relatively mature, and the monitoring results are relatively accurate. The smart bracelet can calculate the energy consumed by an athlete based on the exercise time and rate and her weight. Smart bracelets can also be used to detect users' sleep, and use sensors to monitor users' subtle movements during sleep and analyze their sleep status. Users can keep track of their exercise status at any time, and the smart bracelet can also monitor various internal and external movements of the body.

When a user wears a smart bracelet while exercising, the smart bracelet can calculate the user's optimal amount of exercise based on their height, weight and organs, and recommend corresponding sports guidance based on the individual. And during exercise, it is easy to ignore your body's demand for exercise due to personal interests, resulting in excessive exercise, which will damage the body's systemic immunity, which will be self-defeating and affect your health. At this time, the smart bracelet can play a monitoring role, combining relevant sports data to clearly display sports suggestions to athletes, so that athletes can arrange reasonable sports programs based on reference data. Therefore, looking at all aspects of smart bracelets, they play an important role in promoting sports.

As the functions of smart bracelets continue to improve and the intensity and scope of publicity continue to expand, more and more people are accepting smart bracelets, resulting in more and more people buying smart bracelets. Because the main function of smart bracelets is to monitor the user's physical condition and exercise status and make suggestions based on these, people today have many bad habits in their daily lives. Under the supervision and suggestions of smart bracelets, there should be more People participate in physical exercise. As mentioned earlier, smart bracelets can suggest different sports according to the different qualities of the human body, such as basketball, football, badminton, running and other sports. At the same time, they will also promote the development of all aspects of sports. Smart bracelets and sports The development of sports is mutual. At the same time, smart bracelets also play an important role in swimming. With a waterproof smart bracelet, you don't have to worry about water intrusion causing inaccuracy or affecting use during swimming. Therefore, it can attract many swimming enthusiasts to buy it and bring convenience to swimmers.

4. Development of mobile payment function of smart bracelet

The payment service model of mobile payment allows users to use mobile terminals to consume products or services and directly or indirectly issue payment instructions to bank financial institutions through the Internet, mobile devices or proximity sensors to generate payment or transfer funds to realize the mobile payment function. For example, using Alipay to pay and WeChat Pay are both called mobile payments. NFC payment is also another way of mobile payment. It means that when consumers purchase products or services, they use NFC technology to complete the payment through mobile phones, smart bracelets and other handheld devices. It is a new form of mobile payment. The use of NFC broadcast channels or vending machines and POS cash registers and other mechanical devices complete the payment process for communication devices without the need to use mobile networks alone.

With the continuous development of the times, mobile payment has become a trend. We must make its functions better and apply the functions of mobile payment and smart bracelets to the best. In today's society, people who choose to travel by public transportation will regard the card as a must-have. The card does bring a lot of convenience to everyone to pay cash, but at the same time, there are also various problems such as omission, loss, and inconvenience of recharging the card. At this time, in order to avoid these problems, smart bracelets have become one of the must-haves for travel, making up for the lack of smart cards.

The smart bracelet can not only recharge and inquire about business at any time, but also can check relevant payment records. It can play the role of a personal secretary and record monthly travel mileage and expenditure list. Moreover, the smart bracelet exempts the merchants from handling fees for the consumption of all-in-one card customers. Therefore, smart bracelets are also very popular among merchants. In order to cultivate users' habit of using smart bracelets, they can also use some preferential discounts from merchants and use their own positioning systems to provide merchants with more efficient information. For merchants and users It is a win-win situation, and it can also connect users and businesses very well. With the increasing number of users of smart bracelets and the continuous establishment of capital flow, the issue of capital security has become an issue that everyone needs to pay attention to. Now many banks have also opened related services, binding credit cards and smart bracelets to make credit card payments more convenient. In addition to monitoring sleep and recording exercise data, the bracelet also has payment functions, and the smart bracelet also has The UnionPay standard security financial chip is installed, and security issues are also guaranteed accordingly. Smart bracelet users only need to wear the bracelet to spend on any machine with QuickPass. Its security issues are guaranteed by credit card-related banks from the aspects of transaction management, financial management assurance and physical layer. In the era of big data, banks will form big data based on users' mobile payment situations. Every transaction of each user will be recorded and retained, and the big data will be used in all aspects.

5. Smart bracelet hardware design method

1. Smart bracelet main control chip

After years of development, many types of microcontrollers have been developed, such as 51 microcontrollers, MSP430 microcontrollers, TMS microcontrollers, STM32 microcontrollers, etc. [5]. The reasons for choosing to use STM32 microcontroller are as follows: extremely high performance: mainstream Cortex core; rich and reasonable peripherals, reasonable price; simple modular design; smooth and extremely fast computing speed.

2. Heart rate detection

The photoelectric transmission measurement principle refers to hitting a beam of light on the skin to measure the reflection/transmission of light while in close contact with the skin and the photoelectric heart rate sensor. Because blood has the property of absorbing light of specific wavelengths, every time the heart pumps blood to the body, the specific wavelengths are absorbed and reduced by the blood, so that the heartbeat can be determined. However, the disadvantage of heart rate detection is that it consumes more energy and is interfered by ambient light. Currently, smart bracelets or watches on the market mainly use photoelectric transmission measurement methods to monitor heart rate. Other sensors and measurement methods have larger errors.

3. Smart bracelet step counting design

The core of the electronic pedometer is a vibration sensor. The 3D pedometer uses an electronic acceleration sensor that is currently widely used. Its detection results are more accurate and have strong anti-interference ability. The 3D pedometer can be worn at will and is not affected by external factors, making the design of smart bracelets easier.

When we move, we have a corresponding acceleration that has a peak value at a certain point. It is most accurate to detect the number of steps from the acceleration of the feet. Calculate the acceleration generated by the swing of your hands and waist while walking. By detecting and comparing the peaks and troughs of the acceleration and recording them, you can get the number of walking steps.

4. Selection of smart bracelet sensors

The basic styles of acceleration sensors are two-axis and three-axis. Two-axis can only measure planes; three-axis sensors can better detect the position of the X-axis, Y-axis, and Z-axis of the device in three-dimensional space to achieve more accurate recording. Compared with different sensors used in ECG signal testing and vibration measurement, the photoelectric heart rate sensor is more accurate and faster, and can improve the overall performance and reliability of the smart bracelet.

5. Alarm clock design

Based on the system time, when the smart alarm clock is turned on to wake up, the bracelet detects that the user is in a light sleep state and will vibrate 3 times before setting the alarm time half an hour; if the owner does not wake up, the bracelet will vibrate after one minute. Vibrate three more times. If you have not woken up, the bracelet will vibrate 3 times after 3 minutes. After 9 vibrations, if you have woken up, the bracelet will stop vibrating. If you have not woken up, the bracelet will continue to vibrate 3 times. The number of vibrations depends on you. time to get up. The vibration is generated by a vibration motor in the bracelet. When the set time point is reached, the vibration motor will be triggered, and the vibration time is controlled by the delay.

6. Human body energy consumption detection

The smart bracelet calculates according to a certain calorie consumption algorithm. It may include your normal walking, jogging, and running steps. However, it is difficult to judge the ratio of exercise and strength, so it can only be calculated by the number of steps you walk. Calculating the energy you consume is not very accurate, and the type of exercise cannot be distinguished. The calories you burn when walking normally are the exact energy you burn; the calories you burn when jogging are detected to be less than the energy you burn exactly; the calories you burn when you run fast are detected Much less than the exact amount of energy you consume.

6. Smart bracelet software design plan

The assembly language program has high efficiency and takes up little memory, but it is a primary language and needs to understand the relevant hardware structure, which is difficult to program and poor in portability. C language has some characteristics of high-level language and primary language, and has a rich library of callable functions, which saves a lot of trouble of repeated design. Therefore, this system uses C language for program design and development, and the whole program is composed of the main program and various subroutines.

1. Design of the main program of the smart bracelet

The main program is the main part of the whole program, which integrates various subroutines to complete the functions of system initialization, data display, data processing, parameter transmission, and control signal generation [8]. When the system is powered on, each subsystem starts to work, and the single-chip microcomputer monitors each subsystem. When manual control is required, press the corresponding touch button to generate a corresponding button to interrupt and turn to manual control. When there is no manual control, the signals detected by each detection system are accepted, and the corresponding parameters are displayed through the LCD. When you want to know various physical indicators, you only need to touch the touch button to display the results on the LCD screen and keep it on. Screen for 3 to 4 seconds, and switch between various indicators.

2. Design of each subroutine of the smart bracelet

The system uses C language to write data acquisition and processing algorithm modules. The basic information of the system, step counting, heart rate, temperature and humidity and other subroutines are modularized using library functions, and finally inserted into the general program.

(1) Acquisition of temperature and humidity: use temperature sensors or thermistors when designing temperature conversion circuits. After the conversion circuit is used, the frequency measurement is carried out by the single-chip microcomputer to obtain the method of measuring the temperature indirectly. The method of temperature detection is to use devices such as thermal diodes and thermistors as sensors to realize dynamic changes in temperature and resistance. Finally, the single-chip microcomputer is used to detect the output frequency of the oscillator, and then the functional relationship between temperature and frequency is used to indirectly detect the frequency and speed. This sensor achieves the temperature measurement function through the semiconductor temperature characteristic.

(2) Heart rate monitoring: The photoelectric sensor emits light of a certain wavelength and hits the skin. The blood in the body absorbs the light of a certain wavelength. When the heart pumps blood, the blood absorbs a specific wavelength. When the sensor detects the returned wavelength When the number is different from the number of emitted wavelengths, the difference will be converted into a voltage value, which will be converted into 16 digital data by an analog-to-digital converter.

(3) IIC bus data transmission: specific data communication workflow: the device that needs to send data is the main device, send a bus start signal, start the bus, and send the address of the slave device of the data receiver to the bus. All devices can receive the address signal sent by the master device from the bus, and compare the received address with its own address in the device. Only the addressable from the device is the receiver, if the address is consistent, send a response signal to establish a connection, send data, display the data measured by the sensor on the LCD screen, and further send it to the mobile phone or computer until Data transfer is complete.

(4) Button design: The button design of the smart bracelet is mainly a touch screen design, which not only increases its intelligence, but also increases its simplicity, making it smaller and more comfortable to wear. This design increases its reliability and durability.

Summarize

With the advent of smart wearable devices, there will be more and more wearable related technology products. Therefore, the development of smart bracelets is also very potential. The combination of smart bracelets and medical health, sports and mobile payment will also be closer. In the future, the combination of these three will also make our life more convenient and faster.

The above are the details of the smart bracelet solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for smart wearable devices, you can rest assured to leave it to us. We have rich experience in customizing the development of electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS solutions, the development of Bluetooth audio, the development of children's toys, and the development of electronic education products.