Digital positioning system and method for digestive tract electronic capsule

Abstract

The invention relates to a digital positioning system for a digestive tract electronic capsule. The system comprises a multi-magnetic-source frequency-dividing excitation device arranged outside the human body, a digital magnetic field detecting device and a data wireless receiving and processing platform arranged outside the human body. The multi-magnetic-source frequency-dividing excitation device is used for generating alternating magnetic fields different in frequency; the digital magnetic field detecting device is fixed to the electronic capsule and used for detecting the magnetic field strength of a position where the electronic capsule is located and then extracting a characteristic value; the data wireless receiving and processing platform is in wireless connection with the multi-magnetic-source frequency-dividing excitation device and the digital magnetic field detecting device and is used for receiving the characteristic value sent by the digital magnetic field detecting device and performing data analysis and azimuth solving. The invention also discloses a digital positioning method. The method is based on the digital positioning system for the digestive tract electroniccapsule and adopts a digital signal processing technology and a simulation signal front-end preprocessing technology which are both suitable for a multi-magnetic-source tracking method for achievingdigital positioning of the electronic capsule. Compared with the prior art, the system has the advantages of being high in anti-interference capability, low in power consumption, high in real-time performance, high in processing speed and the like.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a digital positioning system and method for electronic capsules of the digestive tract. Background technique [0002] With the development of microelectronics technology, MEMS technology, robot technology, wireless communication and other technologies, electronic capsule-like diagnosis and treatment devices for digestive tract (hereinafter referred to as electronic capsules) have become the research hotspot and development direction of modern medical devices. Miniaturization enables electronic capsules to enter the digestive tract of the human body, monitor multiple physiological parameters of the digestive tract, capture images of the digestive tract, identify diseased tissues, and actively administer drugs or perform biopsy. [0003] In medical applications, doctors cannot know the position of the electronic capsule in the body, so they cannot match the diagnosis information with...

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Problems solved by technology

[0004] The low-frequency noise of electronic components and the geomagnetic field signal are difficult to filter out in the magnetostatic signal. The number of unknowns in the solution of the magnetic field inverse problem is large, the solution is time-consuming, and it is easy to fall into the local extreme point, and the size and power consumption of the electronic capsule are constrained. It is a difficult point in the design of the internal device of the magnetic tracking system; in addition, in the existing research on the AC magnetic positioning method, most of the external magnetic field excitation devices use a time-sharing method to distinguish signals, and the real-time performance of this method needs to be improved

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