【作者】 陈亮；

【导师】 王惠南；

【作者基本信息】 南京航空航天大学 ， 精密仪器及机械， 2007， 硕士

【摘要】 胶囊内窥镜系统是一种新型的无创无痛消化道无线检测系统。检测时,患者吞服一粒如胶囊大小的微型图像采集装置,采集的图像通过无线方式传输到体外接收装置,医生通过图像工作站浏览接收的图像,诊断患者的消化道疾病。与传统推进式内窥镜相比,具有无痛苦、安全卫生及操作简便等优点。目前,以色列、日本、韩国及中国等都在致力于这方面的研究,并分别开发出临床应用的产品。胶囊内窥镜系统是微机电系统(MEMS)、光电工程、无线通讯和生物医学等多种技术相结合的综合系统,包括无线图像传输、供电、照明、磁场驱动等多个子系统,其中无线图像传输是胶囊内窥镜系统的核心技术。本文针对胶囊内窥镜无线图像传输系统,提出了一种全数字化的解决方案,该方案采用微型CMOS图像传感器OV7649模块和2.4GHz频段无线收发一体芯片nRF2401进行图像采集与无线传输,由高速混合信号微处理器c8051F330控制,具有功耗低、结构简单、成本低廉及安全可靠等优点,是对胶囊内窥镜无线图像传输系统设计的一种新的尝试。在方案设计的基础之上,完成了系统硬件与软件设计并对模拟样机进行了整体调试,初步实现了灰度图像的无线传输。最后,针对设计中的不足提出了改进方案并展望了胶囊内窥镜的未来发展方向。更多还原

【Abstract】 Capsule endoscope system is a new-style wireless checking system which is woundless and painless used for Gastrointestinal tract. When checking, the patient swallows one pill-sized images acquisition device, the images collected are transferred by wireless way to extracorporeal receiving device, the doctor browses the received images, diagnoses the patient’s Gastrointestinal tract disease by image workstation. Compared with the conventional pulsive endoscope, capsule endoscope has the strongpoints of indolence, security, sanitation and operating easily, etc. Presently, some countries have concentrated efforts on the research of capsule endoscope and developed out the clinical practical products respectively, such as Israel, Japan, Korea and China. Capsule endoscope system is a synthetical system which is the combination of MEMS technology, Opto-Electronic Engineering, wireless communication technology, biomedicine technology, etc. It also includes various subsystems, such as wireless image transmission, power supply, illumination, magnetic field drive, etc. Among them, wireless image transmission is the key technology of capsule endoscope.In this paper, a kind of entire digitization scheme about the wireless image transmission subsystem of capsule endoscope is brought forward, adopting the CMOS image sensor OV7649 module and single chip 2.4GHz transceiver nRF2401 to carry out image acquisition and wireless transmission, controlled by high speed mixed-signal MCU c8051F330,which has the excellence of low power, simple structure, low cost and good security, it’s a new trial to design the wireless image transmission subsystem of capsule endoscope. On the basis of scheme design, hardware and software is designed, also the debugging of model machine is carried out, then, the wireless transmission of B&W image is achieved. Finally, the improvement scheme is brought forward specifically for the shortage of the former design, and, the future development direction of capsule endoscope is discussed.更多还原