Abstract
With the advancement of science and technology and the rapid development of the field of intelligence, new sensor technology has also made great progress. The availability and use speed of motion sensor technology are increasing rapidly, while its cost is reduced, the overall performance is also more complete, and the application fields are becoming more and more extensive. Based on the introduction and summary of the human body structure and the characteristics of sports, in order to facilitate the study of human movement, this article establishes a rod-shaped sports model and a human body coordinate system that is convenient for analysis and calculation. Through the analysis of commonly used sports parameter measurement methods, a method of using acceleration parameters for sports measurement and analysis is proposed. The motion sensor is used to measure the movement of the limbs, and the mathematical relationship between acceleration parameters and speed, displacement, and other parameters is used to solve other motion parameters, so as to analyze the posture and movement trajectory of sports. We developed a motion acquisition system which is divided into two parts: a signal acquisition unit and a data processing unit. With ARM7 and three-axis accelerometer ADXL330 as the core, it can realize information acquisition and data analysis of up to 5 sensor network nodes. The topology management platform mainly formulates the sleep strategy of suitable nodes according to the changes of the sensor network topology, maintains the connectivity of the network, and ensures the effective transmission of data. On the basis of the performance test of the system, a sports measurement experiment was carried out, and it was applied to the control of competitive sports for reliability testing. The experimental results verified the use of the sports information acquisition system to collect and analyze sports information.
Highlights
Human sports are closely related to human health and have been receiving extensive attention
A three-dimensional acceleration monitoring system is built by using the three-dimensional motion sensor MMA7260 and the processor to monitor sports energy consumption and daily behavior
The experimental results show that the energy consumption measurement accuracy can reach more than 94%
Summary
Human sports are closely related to human health and have been receiving extensive attention. The hardware design of the entire sports information collection system based on motion sensors is completed, and the overall design plan of the system is given first, and on this basis, the system adopts a modular design and the attitude measurement unit, UWB positioning unit, and data storage and communication unit. This new type of sensor is a combination of a barometer and a three-axis accelerometer, which can more accurately measure the energy consumption of vertical motion. The system adopts a modular design, which makes the system more convenient to expand and upgrade and has better applicability and reliability
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