Study Of Flexible Force-Sensitive Sensor And Application Technology

The useful technical attempts, such as the compositive application of multidisciplinary science and technology, the complete understanding on the mechanical characteristics of human motion, and the development of advanced auxiliary training equipment, have become the trend of competitive sports scientific research and training. Due to lack of online acquisition methods and techniques of necessary Kinetic information on sports in the past, sports imaging system was frequently used to obtain the kinematic information of training process, and to diagnose and instruct the daily training by off-line image dissection. This method has achieved some success in conventional training, but there are obvious limitations:first, the lack of kinetic information required to improve the quality of movement, which lead the coach difficultly to understand the dynamic origin of the technical action, and impossibly to guide the athlete to optimize the movement structure through improving muscle function, then the so-called scientific training tend to mimic the action appearance of the outstanding players; Second, the lack of on-site training guidance system that can characterize the essential rules of technical movements, which lead the coach instructions only to rely on post hoc analysis, the athlete’s daily training to have no immediate feedback and coaching in the training site, and the training effect to depends mainly on the knowledge and experience of the coach and repeated training experience of the athletes, further more, the training efficient, the athletes fatigue and sports injuries difficultly to control. Therefore, the online acquisition of human motion mechanics information and on-site training guidance have become the bottleneck problems of efficient sports training and research.This Dissertation focus on the sports characterized by footwork to research on these bottlenecks. First we systematically studied the continuous on-line acquisition methods and techniques of human gait information in a large area space. Then a flexible array of pressure sensors with large size, low-cost and high-density was designed and developed. And then the specific sensor calibration, signal detection and processing technical methods were researched and resolved to build an innovative sports digital venues that can meet the demand of the sports characterized by footwork to get continues gait information online. And finally, an on-site training guidance system was constructed and applied in daily training testing and analysis, and a good application results was achieved. The main contents of this dissertation are as follows:(1) Based on the analysis of the sensing mechanism of the flexible pressure sensor and the technical requirements of the tactile gait information acquisition, a structural design and performance testing method of the sensor was proposed, and the preparation technology and production processes of flexible array pressure sensor in large size was explored. Based on the Comparison and analysis of the detection principle between both of common measurement method and secondary measurement method, a signal detection method for large size flexible array of pressure sensors was proposed. Then we designed and developed a flexible array of pressure sensor, with large size, low-cost and high-density, to solve the key technical issues for the contact force information acquisition on human-environment interface in a rather large area.(2) Base on the analysis of the calibration significance and calibration method of traditional force sensor, both calibration methods, point-to-point method and area method, for the flexible array of pressure sensor in large size, were proposed, and the calibration system for the area method was developed.(3) An innovative digital sports venues that can meet the scientific training demand of the sports characterized by footwork was proposed and built to synchronously get the continuous kinematic parameters and kinetic parameters of gait online. The design method of the structure of digital venues was defined, the key technical issues, such as high speed data acquisition, clock synchronization and data compression were researched and resolved, and the constructed digital venues was functioned to be self-configurable in shape and area, large size and no measurement blind.(4) Based on measured data, a static and dynamic foot-type automatic recognition algorithms was proposed, focusing on gait feature of the footwork sports extraction method, the applied software architecture was completed for the applications of the digital venues, by which, those functions, such as real-time collection of sports information, analysis of sport characteristics, display and storage of the training programs, and the automatic assembled configuration, were realized.(5) The digital venues was adopted to research the application technology of long jump. Based on the characteristics of gait, speed structure and power type of the athletes, the technical features and technical capacity of the long jump athlete was researched.