Structural Design and Analysis of a New Four-blade Biopsy Capsule Endoscope

Due to the rapid spread of COVID-19 around the world, people's diet environment has also changed, and gastrointestinal diseases have become a common disease around us so far, and the prevalence is on the rise. But because traditional treatments for gastrointestinal diseases are unfriendly to patients, they often require the administration of anesthetics, which can cause side effects. Wireless capsule endoscope is a kind of medical robot that can alleviate the pain of patients, and the research on wireless capsule endoscope has been gradually mature at home and abroad, this paper designed a new four-page propeller-driven biopsy capsule robot. The optimal number of propeller pages is obtained by comparing the velocity of three different numbers of propeller blades in the pipeline. The three axis Helmholtz coil driving system and biopsy module based on CAM structure are also introduced. At the same time, the anchoring module used for precise biopsy of the robot is introduced, so as to ensure that the biopsy capsule robot can reach the specified position quickly and accurately and complete the biopsy task. Finally, we use simulation software to simulate the velocity and pressure of different propeller blades in the same liquid.