摘要
以提升运动员运动损伤检测准确率为目标,提出了激光超声谐波技术的运动损伤非接触检测方法。激光超声传感器利用激光发射调频信号中的二次谐波获取高质量待检测运动损伤区域图像,通过小波分析方法提取运动损伤区域图像内非平稳信号获取运动损伤特征,利用激光超声Lamb波传播状态依据提取运动损伤特征完成图像内运动损伤的精准定位,实现运动损伤非接触检测。实例分析结果表明,该方法可实现非接触检测不同运动项目运动员各身体部位急性以及慢性运动损伤,且运动损伤检测准确率高于99%。
In order to improve the accuracy of athletes’ sports injury detection,this paper studies the non-contact detection of sports injury with laser ultrasonic harmonic technology. The laser ultrasonic sensor uses the second harmonic of the laser emission frequency modulation signal to obtain high-quality image of the sports injury area to be detected. The non-stationary signal in the image of the motion damage area is extracted by the wavelet analysis method to obtain the characteristics of the motion damage. The accurate positioning of the motion damage in the image is completed by using the propagation state of the laser ultrasonic Lamb wave non-contact detection. The results of case analysis show that the method can realize non-contact detection of acute and chronic sports injuries in different sports athletes,and the accuracy rate of sports injury detection is higher than 99%.
作者
章剑
ZHANG Jian(Nanchang Institute of Technology,Nanchang 330044,China)
出处
《激光杂志》
CAS
北大核心
2021年第10期171-175,共5页
Laser Journal
基金
国家自然科学基金(No.61663033)。
关键词
激光超声
谐波技术
运动损伤
非接触
检测
调频信号
laser ultrasound
harmonic technology
sports injury
non-contact
detection
frequency modulation signal
