Electromagnetic tracking system and method based on rapid determination of vector rotation angle of maximum magnetic induction intensity
A technology of magnetic induction intensity and vector rotation, applied in the field of electromagnetic tracking, can solve the problems of poor real-time performance of the system and poor search flexibility, and achieve the effects of avoiding positioning errors, improving positioning speed, and avoiding system instability
Inactive Publication Date: 2015-07-15
FUDAN UNIV
View PDF6 Cites 28 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, its positioning speed is limited by the rotation speed of the solenoid driven by the stepping motor, and the real-time performance of the system is poor; and the search process can only be carried out in the limited rotation plane of the stepping motor, and the search flexibility is poor
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0075]The composition and working process of the system will be described below in conjunction with specific embodiments and with reference to the accompanying drawings. The coordinate system definition involved in this specific embodiment is the same as Table 1, as Figure 7 Shown; The definition of the horizontal rotation angle and vertical rotation angle involved is the same as the content of the invention.
[0076] This specific embodiment designs figure 1 The electromagnetic tracking system 1 shown includes four parts: a three-axis magnetic field sensor device 2 , a magnetic field source device 3 , a control processing display device 4 , and a controllable constant current source device 5 . The three-axis magnetic field sensor device 2 is attached to the tracking target. The magnetic field source device 3 includes two magnetic field sources 10 and 11 (corresponding to the magnetic field source 1 and the magnetic field source 2 described in the summary of the invention ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
The invention belongs to the technical field of electromagnetic tracking, and particularly discloses an electromagnetic tracking system and method based on rapid determination of a vector rotation angle of maximum magnetic induction intensity. The electromagnetic tracking system disclosed by the invention consists of a three-axis magnetic-field sensor device, magnetic-field source devices, a controllable constant-current source device and a control processing display device; the controllable constant-current source device stimulates three coils which are wound on a magnetic core made of soft magnetic ferrite material and are mutually orthometric, and the central points of the coils are overlapped, so that one magnetic-field source device is formed; the three-axis magnetic-field sensor device is used for detecting the magnetic induction intensity of the magnetic-field source devices, and the control processing display device can control the controllable constant-current source device to stimulate the coils and can perform positioning calculation according to the magnetic induction intensity detected by the three-axis magnetic-field sensor device. Due to the adoption of the electromagnetic tracking system disclosed by the invention, positioning can be realized by only stimulating the three coils once, the searching process is avoided, the real-time performance is significantly improved, the stability is high, the calculating complexity is low, and the electromagnetic tracking system can be applied to the navigation of minimally invasive surgery and other fields, such as virtual (enhancing) reality, and three-dimension ultrasonic imaging.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic tracking, and specifically relates to an electromagnetic tracking system and method for quickly measuring the rotation angle of a maximum magnetic induction intensity vector by a single excitation of a magnetic field source coil, and then positioning a magnetic field sensor as a tracking target. Background technique [0002] Electromagnetic tracking is a method to obtain the spatial position of the tracking target by using the magnetic field coupling relationship between the magnetic field source and the magnetic field sensor. It has broad application prospects in minimally invasive surgical navigation and has become a research hotspot in the field of target tracking. Compared with other tracking methods, electromagnetic tracking has the advantages of no damage, no radiation, no occlusion, easy operation, and accurate positioning. Aiming at the problems existing in the traditional magnetic...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/12G01B7/004G01B7/30
Inventor 邬小玫沙敏王一枫丁宁
Owner FUDAN UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap