基于视频图像的输液滴速实时监测系统

Real-Time Medical Infusion Monitoring System Based on Video Image

提出了一种基于视频图像的输液滴速实时监测系统,应用数字摄像头获取输液滴斗部位视频图像,利用ARM9嵌入式平台读取并处理视频图像。在Windows CE 5.0平台下开发了USB摄像头驱动程序,监测液滴下落的过程,采用帧间差分法处理输液视频图像,并通过判断是否发生液面震动来获取实时输液速度。讨论了阈值选取和图像定位方法,并通过实验进一步验证,给出了实验结果,结果表明该系统可实时显示输液速度,并及时发出输液速度过低或过高报警。论文对测速误差进行了分析,给出了提高测速精度和软件可靠性的具体措施。该系统使用简单,灵活方便,不妨碍传统人工监视,可满足普通输液监测需求。

A real-time medical infusion monitoring system is proposed based on video image.In the system,a digital camera is used to obtain the infusion video image of the drip bucket,and an ARM9 embedded system is adopted to process the collected video images.The camera driver of USB interface on Windows CE 5.0 is developed.The liquid drop is monitored,and the inter-frame difference method is adopted to process the video images.By judging the surface vibration,the infusion speed is obtained.The methods for threshold selection and image positioning are discussed.Experimental results indicate that the proposed system can display the speed of infusion droplets at real time,and give alerts in time when the infusion speed is too low or too high.The system is easy to use and can meet the demands of normal infusion monitoring.