Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chen Hai-hui Huang Xiao-Ming |
| Copyright Year | 2010 |
| Abstract | X-ray tube's cathode space charge effect is the main interference for real-time control of x-ray tube current. Those factors making filament current drift are unpredictable, which affects the dynamic response performance of the tube current. In order to quickly respond to a wide range of X-ray tube anode voltage, based on closed-loop control strategy of X-ray tube current, real-time voltage control signal (duty cycle) is introduced into feed forward control part to constitute non-linear real-time dynamic compensator for X-ray tube's cathode space charge effect, Filament current is introduced as a deputy control variable into the cascade control of tube current to rapidly respond the current lag, improve the accuracy and reduce the process time constant, Intelligent Chips are utilized to manufacture a high-performance low-cost controller for X-ray machine. MC34067 is utilized to construct main circuit of high-frequency quasi-resonant, which aims to achieve rapid soft-switch control for X-ray tube anode voltage, TL494 is utilized to construct main circuit of X-ray tube current control strategy, MCU is utilized to chose the compensation factor depending on anode voltage range. Based on above ideas, two sets of prototype are made to test, preliminary results show that these control methods and circuit devices are effective. |
| Starting Page | 989 |
| Ending Page | 992 |
| File Size | 327170 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424483334 |
| DOI | 10.1109/ISDEA.2010.151 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-10-13 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | X-ray machine Series-parallel resonant Cathode space charge effect RLC circuits Resonant frequency Compensator Converters Control systems Electron tubes Control strategy Voltage control Anodes |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|