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Design of UWB/WiFi Module based Wireless Transmission for Endoscopic Camera

UWB/WiFi 모듈 기반의 내시경 카메라용 무선전송 설계

  • Shim, Dongha (Seoul National University of Science & Technology) ;
  • Lee, Jaegon (Dept. of Digital Design, Catholic University of Daegu) ;
  • Yi, Jaeson (Haesung Optics Co., Ltd.) ;
  • Cha, Jaesang (Seoul National University of Science & Technology) ;
  • Kang, Mingoo (Division of Inform. & Telecomm., Hanshin Univ.)
  • Received : 2014.10.14
  • Accepted : 2014.12.03
  • Published : 2015.02.28

Abstract

Ultra-wide-angle wireless endoscopes are demonstrated in this paper. The endoscope is composed of an ultra-wide-angle camera module and wireless transmission module. A lens unit with the ultra-wide FOV of 162 degrees is designed and manufactured. The lens, image sensor, and camera processor unit are packaged together in a $3{\times}3{\times}9-cm3$ case. The wireless transmission modules are implemented based on UWB- and WiFi-based platform, respectively. The UWB-based module can transmit HD video to a computer in resolution of $2048{\times}1536$ (QXGA) and the frame rate of 15 fps in MJPEG compression mode. The maximum data transfer rate reaches 41.2 Mbps. The FOV and the resolution of the endoscope is comparable to a medical-grade endoscope. The FOV and resolution is ~3X and 16X higher than that of a commercial high-performance WiFi endoscope, respectively. The WiFi-based module streams out video to a smart device with th maximum date transfer rate of 1.5 Mbps at the resolution of $640{\times}480$ (VGA) and the frame rate of 30 fps in MJPEG compression mode. The implemented components show the feasibility of cheap medical-grade wireless electronic endoscopes, which can be effectively used in u-healthcare, emergency treatment, home-healthcare, remote diagnosis, etc.

본 논문에서는 초광각 무선 내시경을 제안하고 구현하였다. 내시경은 초광각 카메라 모듈과 무선전송 모듈로 구성된다. 162도의 초광광 렌즈와 이미지 센서 및 카메라 프로세서가 $3{\times}3{\times}9cm3$ 크기의 케이스에 함께 패키지 된다. 무선전송 모듈로 UWB 기반 및 WiFi 기반의 플랫폼을 각각 구현한다. UWB 기반 모듈은 의 고화질 영상을 MJPEG로 압축하여, $2048{\times}1536$ (QXGA)의 해상도에서 15 fps의 속도로 영상을 전송하며, 최대 데이터 전송속도는 41.2 Mbps에 달한다. 구현된 내시경은 의료용 내시경의 화각과 해상도 수준을 가지며, 상용 고성능 WiFi 내시경과 비교할 때 ~3X의 화각과 16X의 해상도를 갖는다. WiFi 기반의 모듈은 $640{\times}480$ (VGA)의 해상도에서 30 fps의 속도로 영상을 스마트 기기로 스트리밍 하며, 최대 1.5 Mbps의 데이터 전송속도를 보여준다. 구현된 모듈은 저가격의 의료용 무선 전자 내시경의 구현 가능성을 보여주며, U-헬스케어, 응급처치, 가정의료, 원격진료 등에 효과적으로 활용될 수 있을 것으로 기대된다.

Keywords

References

  1. J. M. Edmonson, "History of the instruments for gastrointestinal endoscopy," Gastrointestinal endoscopy 37 (2 Suppl): S27-S56, 1991. http://dx.doi.org/10.1016/S0016-5107(91)70910-3
  2. (2012) Endoscopes Quick Reference Guide. Texas Instruments. http://www.ti.com/lit/sl/slyy030/slyy030.pdf
  3. Supereyes C001. http://www.supereyes.cc
  4. Generaltools iBorescope DCiS1. http://www.generaltools.com/DCiS1--iBorescope-Wifi-Enabled-Real-Time-Video-Capture_p_1937.html
  5. Pentax Medical, "The i10 endoscope series". http://www.pentaxmedical.de
  6. J. S. Lee, M. G. Kang, J. H. Kim, and H. J. Song, "Design of Wideangle based small Endoscopic Lens Module with UWB Interface," in The 9th APIC-IST 2014, KSII, Nepal, Jul. 2014. http://apicist.org/2014/
  7. D. Shim, J. Kim, M. Lee, H. Kim, S. Hong, J. Lee, and J. Cha, "A Wide-angle Wireless Camera Package using Ultra Wide Band Communication," Proceedings of International Conference on Contents, Platform, Network and Device, Busan, Korea, 2014, p. 41. http://eng.iibc.kr/iconf/iccpnd2014/
  8. J. G. Lee, M. G. Kang, I. K Kim, and K. T. Lee, "Design of High-resolution Wide-angle Lens Module, and Image Distortion Compensation for Smart NUX," KICES, Vol.7, No.5, pp. 999-1004, Oct. 2012. http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=KCTSAD_2012_v7n5_999
  9. R. Kingslake, Lens Design Fundamentals, Academic Press, 1978. http://www.sciencedirect.com/science/book/9780123743015
  10. E. Fullerton, Lens Calculation - Do the Math, Milestone White Paper, 2009. http://vdss.ca/milestone/12.pdf
  11. OmniVison OV3640 (CMOS image sensor). [online]. Available: http://www.ovt.com/uploads/parts/OV3640_PB(1.02)_web.pdf
  12. OmniVision OV538 (Camera bridge processor). [online]. Available: http://www.ovt.com/products/ip_detail.php?id=9
  13. K. Siwiak and D. McKeown, Ultra-wideband Radio Technology, Wiley, 2004. http://onlinelibrary.wiley.com/book/10.1002/0470859334
  14. IEEE 802.15 Working Group for WPAN. http://www.ieee802.org/15/
  15. E. Ayar. (2010). UWB Wireless Video Transmission Technology in Medical Applications. NDS, CA. http://www.ndssi.com.cn/data/uploads/pdf/Surgical/ZeroWire/Wireless-Video-Transmission-in-Medical-Applications.pdf
  16. Wireless USB (WUSB) Documents. http://www.usb.org/developers/wusb/
  17. Alereon AL5616 (UWB Radio Card Adapter). http://www.alereon.com/products/reference-design-boards/al5616-worldwide-wireless-usb-adapter.
  18. Alereon AL5100/AL5301 (UWB Chipset). http://www.alereon.com/products/chipsets/al5100al5301-chipset
  19. Hanjin battery charger/ 5V boosting module. http://www.eleparts.co.kr/EPX3CFF6
  20. MJPEG (Motion JPEG). http://en.wikipedia.org/wiki/Motion_JPEG
  21. VLC Media player. http://www.videolan.org/vlc/index.ko.html
  22. Raspberry Pi. http://www.raspberrypi.org/
  23. ipTIME. http://www.iptime.co.kr