| Capsule endoscopy system is a new type of wireless detection system with capsule size and mainly used for detecting digestive diseases in medicine. While detecting, the patient swallows this detection device just like having a pill. The device in the human body will shoot as many pictures as it can when going through the digestive tract and transmit them to the receiving device outside. Doctors diagnose the disease based on the received pictures. Because of the size restriction and long time wireless video transmission request under practical application condition, the realization reasearch of the capsule endoscopy system has been a hot issue of concern.Based on analyzing the characteristics, principle and key technologies of capsule endoscopy system, this thesis firstly studied the technologies in-depth which are related to the realization of the system, including image sensing technology, wireless data transmission technology, low-power design technology and packaging technology. Then put forward a realization scheme of capsule endoscopy system. At last, we design a verification system of the scheme, including system hardware design and software design. After debugging to this design, preliminarily completed the verification process of the the wireless video transmission in capsule endoscopy system, the results proved the feasibility of the selected scheme, which laid a solid foundation for further studies and developing a practical capsule endoscopy.The innovations of this thesis are that: 1. Designed and realized real-time digital video image transmission under low transmission rate condition through a way of digitized image grabbing in combination with MPEG4 hardware compression. 2. Designed and realized low-cost wireless video transmission using 2.4GHz universal frequency transceiver nRF24L01. |
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