Research And Design Of Wearable Bracelet For Student Physical Health Monitoring

In recent years,the physical health level of students in our country has continued to decline.A number of authoritative surveys have pointed out that the hidden problem is that the current physical education curriculum is just a formality and the supervision of physical testing is insufficient,which has aroused close attention from all walks of life to the physical health of students.With the continuous development of wearable technology,the number of wearable devices with built-in RFID tags is increasing.RFID tags are widely used in wearable devices because of their unique ID code.RFID electronic tag can be used to bind students' identity and ensure the authenticity of sports test data in the process of students' sports test.Therefore,based on the current severe situation of students' physical health and the good development prospect of wearable devices,this paper designs a collection of multiple physical data collection and effective identity matching function by combining wearable technology,WIFI communication technology and RFID identification technology It can be used as an integrated health monitoring bracelet to match the identity of students through RFID chip,collect the physical data generated in the process of students' exercise and centralized test in real time through sensors,and finally realize the data transmission with teachers through WIFI communication function,so as to achieve the purpose of supervising students' physical exercise and improving their physical quality.Firstly,the paper studies the problem that RFID tags are easy to collide,and improves the traditional anti-collision algorithm to make it more suitable for a large number of tag applications.A new grouping structure is established to group the tags in the reader's recognition range.Then,the dynamic prediction weight is used to estimate the number of tags in each group.Finally,the algorithm is combined with the optimal slot number adjustment scheme to achieve efficient and fast identification of tags.Simulation results show the effectiveness of the algorithm.Secondly,the hardware circuit of the bracelet is designed.The NRF51822 chip is used as the main control module to realize the control and data processing of each module.The RFID tag is used to bind the real identity of the students.The photoelectric heart rate sensor is used to collect the heart rate and blood oxygen data.The three-axis accelerometer is used to collect the data of the students' movement state,The active vibration buzzer isused to remind the students to move beyond the limit.The OLED display screen is used to realize the local data display.Meanwhile,the data of the bracelet is sent to the teacher through WIFI wireless transmission.The real-time monitoring of the physique is realized by the cooperation of various functional modules.Finally,the software program of the bracelet is designed and tested based on the hardware and software designed in this paper.It includes the work flow of the whole Bracelet system and the design of timing interrupt.It completes the configuration of chip pin and initialization of each interface.Through the debugging of each module driver,the communication function of WIFI module is realized,and the collection and display of physique data and motion data are realized.