CN102662604B - High speed data collection card for magnetic resonance system - Google Patents
High speed data collection card for magnetic resonance system Download PDFInfo
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- CN102662604B CN102662604B CN201210057026.0A CN201210057026A CN102662604B CN 102662604 B CN102662604 B CN 102662604B CN 201210057026 A CN201210057026 A CN 201210057026A CN 102662604 B CN102662604 B CN 102662604B
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- 238000013480 data collection Methods 0.000 title abstract 5
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000001186 cumulative effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 9
- 230000001351 cycling effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 101150093547 AUX1 gene Proteins 0.000 description 1
- 101100125299 Agrobacterium rhizogenes aux2 gene Proteins 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 101100367246 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) SWA2 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention provides a high speed data collection card for a magnetic resonance system. The high speed data collection card comprises two analog-to-digital conversion chips, and a main control module. The analog-to-digital conversion chips change input sampling results of analog quantity to digital signals and send the digital signals to the main control module. The main control module is used for processing the sampling results carried in the digital signals and outputting the processing results. The processing includes average/accumulate, phase cycling and digital intermediate frequency demodulation. Through controlling the configurations of the main control module and the two analog-to-digital conversion chips, the high speed data collection card realizes a relatively wide analog bandwidth and a high single channel sampling rate. In addition, the high speed data collection card integrates a plurality of on-plate data processing functions used for the magnetic resonance system, and that provides convenience to set up a high speed magnetic resonance system.
Description
Technical field
The present invention relates to a kind of high-speed data acquisition card for magnetic resonance system, belong to data acquisition technology field.
Background technology
Data collecting card refers to the computer extender card automatically taking non electrical quantity or electric quantity signal from the analog-and digital-unit under tests such as sensor and other Devices to test, and it has in fields such as high-speed data acquisition and automatic flow controls applies very widely.
When the ingredient of data collecting card as set of system, often need it can to process the data received, and feedback signal is provided.For this purpose, now commercially like product roughly adopts hardware to add the framework of software, namely data collecting card is only responsible for image data, and transfer data on supporting computing machine, then transfer to the software platform carried on computers to complete the post-processed of data with judging, feedback signal is also supplied to rear end by this software platform by other hardware device.Although such way has larger versatility, there is following shortcoming:
1, bulky not easy of integration: the equipment that such way needs comprises a computing machine, therefore volume is comparatively large, integrated difficulty increases;
2, the acquisition capacity of data collecting card is limited by the traffic rate between data collecting card and computing machine, therefore such board is difficult to have higher sampling rate.
3, universal data collecting card often do not have magnetic resonance system data processing function on the plate that is suitable for.
Summary of the invention
The present invention is that to solve the bandwidth sum sampling rate of the data acquisition that existing data collecting card exists lower, lack be applicable to magnetic resonance system plate on the problem of data processing function, a kind of high-speed data acquisition card for magnetic resonance system is proposed.
The object of the invention is to be achieved through the following technical solutions:
For a high-speed data acquisition card for magnetic resonance system, comprising:
Two modulus conversion chips, the sampled result for the analog quantity by input converts digital signal to, and packing is parallel passes to main control module;
Main control module, for processing the sampled result of carrying in described digital signal, and is exported result by integrated PCIe interface, described process comprises on average/adds up, circulates mutually and digital intermediate frequency demodulation.
The present invention is by the framework of main control module and two modulus conversion chips, achieve higher analog bandwidth and sampling rate for each channel, and the one-piece construction of capture card is simple, and provide be applicable to magnetic resonance system plate on data processing function and general high speed interface, be convenient to be integrated among magnetic resonance system.
Accompanying drawing explanation
The structural representation of the high-speed data acquisition card for magnetic resonance system that Fig. 1 provides for the specific embodiment of the invention;
The structural representation of the specific implementation of the high-speed data acquisition card for magnetic resonance system that Fig. 2 provides for the specific embodiment of the invention.
Embodiment
This embodiment provides a kind of high-speed data acquisition card for magnetic resonance system, as shown in Figure 1, comprising:
Two modulus conversion chips 11, the sampled result for the analog quantity by input converts digital signal to, and transmitted in parallel of packing is to main control module 12;
Main control module 12, for processing the sampled result of carrying in described digital signal, and is exported result by integrated PCIe interface, described process comprises on average/adds up, circulates mutually and digital intermediate frequency demodulation.
Concrete, as shown in Figure 2, two modulus conversion chips 11 all can adopt high speed analog-to-digital conversion chip (ADC), respectively (also can carry out ALTERNATE SAMPLING to same passage) is sampled to the analog quantity of input in two passages (CH1, CH2), convert sampled result to digital signal, and transmitted in parallel of digital signal being packed is to main control module 12.Main control module 12 can adopt field programmable gate array module (FPGA), and inner at FPGA, the sampled result of input can process accordingly, and corresponding process comprises average/cumulative, the function such as circulation, digital intermediate frequency demodulation mutually.
Optionally, can reserved auxiliary port (AUX1, AUX2 and TRIG as in Fig. 2) be directly connected on FPGA, to provide three logical signals for controlling.
Optionally, the basis of the high-speed data acquisition card that can also provide in this embodiment is provided independently static RAM (SRAM) chip, and is connected on FPGA, for the calculation resources of spread F PGA.
Above-mentioned three kinds of data processing methods are all used frequently in magnetic resonance system, thus the feature of magnetic resonance system is combined (as time scale in the high-speed data acquisition card provided in this embodiment, sampling depth, bandwidth demand etc.) targetedly it is realized, concrete implementation method is as follows:
In concrete FPGA, average cumulative submodule, phase cyclic submodule block and digital intermediate frequency demodulation submodule can be comprised.Average cumulative submodule is wherein used under average/accumulation mode, FPGA will start when each TRIG signal arrives the signal gathering fixed time length, and pushed average cumulative submodule and add up, export divided by accumulative frequency after be accumulated predetermined number of times (adjustable), or directly export, thus achieve average/cumulative.Wherein phase cyclic submodule block is used under phase circulation pattern, FPGA will carry out there be the cumulative of symbol on the basis of average mode, push the sign bit of the data of average cumulative submodule at every turn, undertaken overturning or remaining unchanged by according to the value of steering logic signal, namely the data of input are are selectively added and subtracted, instead of simply cumulative, and this selection is completed by the steering logic signal by auxiliary mouth input.Digital intermediate frequency demodulation submodule is wherein used under digital intermediate frequency demodulation modes, user needs modulated signal to be accessed a passage, reference signal demodulation used accesses another passage, ADC is supplied to FPGA after converting analog quantity to digital signal, FPGA will carry out the quadrature demodulation of numeric field to modulated signal, obtain amplitude and the phase information of baseband signal.
After the process of FPGA, demodulation result will be provided to the PCIe controller of FPGA inside, pass to computing machine or other equipment eventually through PCIe adapter, to realize the high speed acquisition to data.
Adopt the technical scheme that this embodiment provides, utilize the framework of FPGA+ high-speed ADC+high-speed SRAM, achieve the analog bandwidth of 3GHz and the sampling rate for each channel of 3GHz; In conjunction with satellite interface, achieve be applied to magnetic resonance system plate on data processing function on the plate such as intermediate frequency demodulation on circulation and plate mutually on average/cumulative, plate; The one-piece construction of the high-speed collection card that this embodiment provides is simple, and provide be applicable to magnetic resonance system plate on data processing function and general high speed interface, be convenient to be integrated among magnetic resonance system.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. for a high-speed data acquisition card for magnetic resonance system, it is characterized in that, comprising:
Two modulus conversion chips, the sampled result for the analog quantity by input converts digital signal to, and transmitted in parallel of packing is to main control module;
Main control module, for processing the sampled result of carrying in described digital signal, and is exported result by integrated PCIe interface, described process comprises on average/adds up, circulates mutually and digital intermediate frequency demodulation;
This high-speed data acquisition card also comprises: an independently sram chip, is connected with main control module, for providing the calculation resources of expansion for main control module.
2. the high-speed data acquisition card for magnetic resonance system according to claim 1, is characterized in that, described main control module also comprises auxiliary port, and described auxiliary port is used for receiving steering logic signal from the external world.
3. the high-speed data acquisition card for magnetic resonance system according to claim 1 to 2 any one, is characterized in that, comprises at described main control module:
Average cumulative submodule, for gathering the signal of fixed time length, and add up the signal of collection, exports, or directly export after being accumulated predetermined number of times divided by accumulative frequency.
4. the high-speed data acquisition card for magnetic resonance system according to claim 3, is characterized in that, also comprises in described main control module:
Phase cyclic submodule block, for carrying out symbol upset according to the value of steering logic signal to sampled data or remaining unchanged, and pushes average cumulative submodule by upset or the sampled data that remains unchanged.
5. the high-speed data acquisition card for magnetic resonance system according to claim 1 to 2 any one, is characterized in that, also comprises in described main control module:
Digital intermediate frequency demodulation submodule, for described digital signal being carried out the quadrature demodulation of numeric field, obtains amplitude and the phase information of baseband signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210057026.0A CN102662604B (en) | 2012-03-06 | 2012-03-06 | High speed data collection card for magnetic resonance system |
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| CN201210057026.0A CN102662604B (en) | 2012-03-06 | 2012-03-06 | High speed data collection card for magnetic resonance system |
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| CN102662604A CN102662604A (en) | 2012-09-12 |
| CN102662604B true CN102662604B (en) | 2015-06-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1361429A (en) * | 2000-12-28 | 2002-07-31 | 中国科学院武汉物理与数学研究所 | Digital nuclear magnetic resonance receiver |
| CN1794141A (en) * | 2005-12-22 | 2006-06-28 | 苏州超锐微电子有限公司 | Manufacturing method of PCI Express data collection card |
| CN101281241A (en) * | 2007-04-06 | 2008-10-08 | Ge医疗系统环球技术有限公司 | MRI equipment and control method thereof |
| CN101604225A (en) * | 2009-06-24 | 2009-12-16 | 北京理工大学 | A kind of 32 channel synchronous signal acquisition boards |
| CN101949868A (en) * | 2010-09-16 | 2011-01-19 | 厦门大学 | Data acquisition device of nuclear magnetic resonance spectrometer |
-
2012
- 2012-03-06 CN CN201210057026.0A patent/CN102662604B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1361429A (en) * | 2000-12-28 | 2002-07-31 | 中国科学院武汉物理与数学研究所 | Digital nuclear magnetic resonance receiver |
| CN1794141A (en) * | 2005-12-22 | 2006-06-28 | 苏州超锐微电子有限公司 | Manufacturing method of PCI Express data collection card |
| CN101281241A (en) * | 2007-04-06 | 2008-10-08 | Ge医疗系统环球技术有限公司 | MRI equipment and control method thereof |
| CN101604225A (en) * | 2009-06-24 | 2009-12-16 | 北京理工大学 | A kind of 32 channel synchronous signal acquisition boards |
| CN101949868A (en) * | 2010-09-16 | 2011-01-19 | 厦门大学 | Data acquisition device of nuclear magnetic resonance spectrometer |
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Address after: 230000 Levels 1-4 and 3-4 in Area A and B of E2 Building, Second Stage of Innovation Industrial Park, 2800 Innovation Avenue, Hefei High-tech Zone, Anhui Province Patentee after: Guoyi Quantum Technology (Hefei) Co.,Ltd. Address before: 230000 Levels 1-4 and 3-4 in Area A and B of E2 Building, Second Stage of Innovation Industrial Park, 2800 Innovation Avenue, Hefei High-tech Zone, Anhui Province Patentee before: Guoyi Quantum (Hefei) Technology Co.,Ltd. |