基于MEMS傳感器的啞鈴動作識別與能耗計算系統(tǒng)的設計與實現(xiàn)
[Abstract]:In order to meet the demand of dumbbell exercise at home, a dumbbell action recognition and energy consumption calculation system based on MEMS sensor is designed and implemented in this paper. Instead of exercising in the gym, the trainer can give a detailed exercise plan and correct the wrong action in real time. The user needs to master the muscle part of the exercise and the effect of the exercise in the home. The system collects the dumbbell movement of the user, identifies and analyzes the user's action type, energy consumption, exercise position and so on, so as to help the user to carry on the correct and effective dumbbell exercise. The system is divided into two parts: the action acquisition end and the computer terminal, and the communication between the action acquisition end and the computer end through Bluetooth. In order to collect the user's motion data, this paper first designs and implements the action acquisition terminal. The action acquisition end is mainly responsible for collecting motion data, including three-dimensional acceleration, three-dimensional angular velocity and so on, and carries out attitude calculation to calculate the Euler angle. It provides data for the computer to identify dumbbell movement and calculate dumbbell motion energy consumption. The motion acquisition terminal is composed of a motion acquisition circuit and a general weight adjustable dumbbell. The motion acquisition circuit is fixed on the ordinary dumbbell to achieve the purpose of collecting dumbbell motion data. Motion acquisition circuit consists of microprocessor, motion sensor, Bluetooth RF, I / O (I / O), power supply and so on. The microprocessor adopts the STM32F103C8T6 microcontroller with ARM Cortex-M3 as the core, the motion sensor adopts the MPU-9250 nine-axis motion tracking sensor, and the DMP module of the sensor can be used to calculate the attitude and provide the attitude data. Bluetooth RF transceiver adopts USR-BLE101 module, which supports BLE 4.1 protocol, I / O part includes keystroke, LED, and extended interface, etc. CR2032 button battery is used for power supply, which can save energy effectively through flexible dormancy and wake-up mechanism of processor and sensor. The motion data is packed in the predefined frame format and sent to the computer through BLE 4.1. The computer is mainly responsible for dumbbell action recognition and energy consumption calculation, including motion recognition method and energy consumption calculation method. In this paper, an action recognition method based on MEMS sensor is proposed. After reading the real time sampling data of 3D acceleration and 3D angular velocity, the data are processed by acceleration decomposition, filtering, period determination, normalization and so on. By analyzing the similarity with the data in the feature database and comparing the Pearson correlation coefficient between the actions to be tested and each group of actions in the database, the recognition of specific actions can be realized, and the repetitive actions can be counted. In this paper, six kinds of common dumbbell actions are tested, and the results show that the method is effective, and the average recognition rate is 94. The energy consumption calculation method is used to analyze the muscle parts of each dumbbell movement. At the same time, the energy (heat) consumption of each action is analyzed by calculating the kinetic energy of the dumbbell. Furthermore, the energy consumed by each muscle part and the total energy consumed by the user are counted. Through the dumbbell action recognition and energy consumption calculation system, the user can accurately grasp the exercise of their muscles, thus more scientific dumbbell exercise.
【學位授予單位】:吉林大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TP212.9
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