CN101793557B - Real-time data acquisition system and method of high-resolution imaging instrument - Google Patents
Real-time data acquisition system and method of high-resolution imaging instrument Download PDFInfo
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- CN101793557B CN101793557B CN2009103118165A CN200910311816A CN101793557B CN 101793557 B CN101793557 B CN 101793557B CN 2009103118165 A CN2009103118165 A CN 2009103118165A CN 200910311816 A CN200910311816 A CN 200910311816A CN 101793557 B CN101793557 B CN 101793557B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 32
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Abstract
The invention relates to real-time data acquisition system and method of a high-resolution imaging instrument, used in a data acquisition card capable of acquiring data at a high speed and a computer capable of storing data at a high speed. The data acquisition card comprises an interface unit, a buffer unit, a data sending unit and a control unit, and the interface unit is connected with an imaging instrument and can convert an LVDS (Low Voltage Differential Signaling) signal into a TTL (Transistor-Transistor Logic) level signal. The invention solves the technical problems that a traditionalimage acquisition and storage system can not satisfy the real-time acquisition and storage requirements of high-resolution imaging data. The invention has the advantages of small use size, portability, simplicity, convenience, stable working performance, reliability, and the like.
Description
Technical field
The present invention relates to a kind of high resolving power interference type imaging spectrometer image data acquiring system and method.
Background technology
The demand for development of high-resolution imaging technology is image acquisition and storage system efficiently.Along with the development of high-resolution imaging technology, more urgent to the needs of high-efficiency reliable image acquisition and storage system.At present, the spatial resolution of high-resolution imaging instrument, temporal resolution all improve greatly.Normal image is gathered and the handling capacity wretched insufficiency of storage system, can not satisfy the real-time collection and the memory requirement of high resolution image data.If can not well solve the problem of such data transmission and storage, the development of high-resolution imaging technology will be hindered seriously.Therefore, design a kind of view data efficiently and gather in real time and storage system, realize high speed acquisition, transmission and storage, can provide favourable technical support for the high-resolution imaging technology to the high-resolution imaging instrument data.
Summary of the invention
The object of the invention provides a kind of high-resolution imaging instrument data real-time collecting system and method, and it has solved the conventional images collection and storage system can not satisfy the real-time collection of high resolution image data and the technical matters of memory requirement.
Technical solution of the present invention:
A kind of high-resolution imaging instrument data real-time collecting system comprises the data collecting card that is used for high-speed data acquisition and is used for the computing machine that high-speed data is stored,
Its special character is:
Described data collecting card comprises interface unit, buffer unit, data transmission unit and control module;
Described interface unit is connected with imager, can be the Transistor-Transistor Logic level signal with the LVDS conversion of signals;
Described buffer unit comprises input buffer, cache module, output buffer; The input end of described input buffer is connected with interface unit, and its output terminal is connected with cache module; The input end of described output buffer is connected with cache module; Described cache module is divided into a plurality of cache blocks;
Described data transmission unit comprises pci interface, PCI/PCI-E bridge; The output terminal of described output buffer is connected with the PCI/PCI-E bridge by pci interface; Described PCI/PCI-E bridge is used to realize the conversion of pci interface and PCI-E interface;
Described control module is used to realize the control of capture card metadata cache;
Described computing machine comprises PCI-E interface, calculator memory, processing unit and disk array; Described PCI-E interface is used to connect PCI/PCI-E bridge and calculator memory; Described calculator memory is divided into a plurality of cache blocks, its output termination disk array; Described disk array is used to realize the computer data storage; Described processing unit is used for computer data storage control.
Above-mentioned interface unit comprises four circuit-switched data interface channels, and described data collecting card also comprises the data integration unit that is arranged between interface unit and buffer unit, and described data integration unit is used to realize the splicing and the packing of four circuit-switched data.
Above-mentioned PCI-E interface adopts PCI-E * 4 interface shapes.
Above-mentioned input buffer is a high-speed synchronous first in first out buffer, and described cache module is high-speed cache SDRAM, and described output buffer is a high-speed synchronous first in first out buffer.
A kind of data real-time collection method based on the described high-resolution imaging instrument data real-time collecting system of claim 1, its special character is: it may further comprise the steps:
Step 1] connection imager, capture card and computing machine;
Step 2] storage space of cache module is divided into n cache blocks, be designated as A0～A (n-1), and any time appointment write cache blocks and to read the cache blocks address different; The maximum input-buffer threshold value of set input buffer and minimum input-buffer threshold value, the output buffers threshold value of setting output buffer; Calculator memory is divided into m cache blocks, is designated as B0～B (m-1), and any time appointment write cache blocks and to read the cache blocks address different;
Step 3] control module control capture card carries out data acquisition; The processing unit control computer is carried out data acquisition;
Step 4] the closing image acquisition function;
Wherein:
Step 3] in control module adopt following steps to carry out data acquisition:
Step 310] control module judges that whether the input buffer state is greater than maximum input-buffer threshold value;
Step 311]
If the input buffer state is greater than maximum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, judge that then whether the output buffer state is greater than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judges whether the cache blocks of reading of appointment is readable;
If it is readable that this reads buffer stopper, then will specify the data of size to read in output buffer from this cache blocks, return step 310 then];
If it is not readable that this reads buffer stopper, then return step 310];
If the output buffer state greater than the output buffers threshold value, then returns step 310];
If the input buffer state less than maximum input-buffer threshold value, judges that then whether the output buffer state is less than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judges whether the cache blocks of reading of appointment is readable;
If it is readable that this reads cache blocks, then will specify the data of size to read in output buffer from this cache blocks, return step 310 then];
If it is not readable that this reads cache blocks, judge that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
If the output buffer state greater than the output buffers threshold value, judges that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
Wherein:
Step 3] in processing unit adopt following steps to carry out data acquisition:
Step 320] processing unit judges whether the cache blocks of writing of appointment is to write in the calculator memory;
Step 321]
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from output buffer, return step 320 then];
If this is write buffer stopper and can not write, judge then whether the cache blocks of reading of appointment is readable in the calculator memory;
If it is readable that this reads buffer stopper, then will specify the data form computer internal memory of size to be read into disk array, return step 320 then];
If it is not readable that this reads buffer stopper, then return step 320].
The data of above-mentioned appointment size are meant the data that are not more than a cache blocks space size.
The said n value gets 16 or 32; Described m value gets 16 or 32.
The said n value gets 16 or 32; Described m value is identical with the n value.
Technique effect of the present invention:
1, high-resolution imaging instrument data real-time collecting system provided by the invention and method have solved at present that mass data output at high-resolution imaging instrument can't realize gathering in real time and the difficult problem of record, and it has following characteristics: image resolution ratio height, acquisition rate height, real-time performance are good; And have and use volume little, be easy to carry simple and convenient, stable work in work, advantage such as reliable.This system is with a wide range of applications, and can also be used in all high-resolution instruments.For example: high-resolution image spectrometer, measurement in space camera, visible light near infrared camera, short-wave infrared camera, thermal infrared imaging instrument etc.
When 2, the inventive method has guaranteed the reliability of hardware data, improved the transfer rate of real-time system greatly.
3, spatial cache utilization factor height of the present invention.The present invention only need guarantee not visit same cache blocks simultaneously in the process of input buffer and the read and write of output port buffer district, then reads and writes operating factor of memory space and is (n-1)/n.The selection of n needs the utilization rate of balanced storage space, input buffer FIFO, output buffer FIFO to select and real-time capture card speed.
4, the present invention selects that two high-speed cache SDRAM are merged into single channel and uses for satisfying the bandwidth demand of PCI-E * 4, and the real-time Transmission rate of view data is not less than 360Mbytes/s.
Description of drawings
Fig. 1 is the synoptic diagram of high-resolution imaging instrument data real-time collecting system of the present invention;
Fig. 2 is the structured flowchart of high-resolution imaging instrument data real-time collecting system of the present invention;
Fig. 3 for computing machine in the high-resolution imaging instrument data real-time collection method of the present invention to data read, demonstration and saved software process flow diagram;
Fig. 4 is the structured flowchart of buffer unit in the high-resolution imaging instrument data real-time collecting system of the present invention;
Fig. 5 is the logical schematic of high-resolution imaging instrument data real-time collection method of the present invention; F0 represents input buffer among the figure, and F1 represents output buffer;
Fig. 6 is the read-write cache block space distribution principle figure of cache module of the present invention; Blk among the figure is the abbreviation of block.
Embodiment
High-resolution imaging instrument data real-time collecting system of the present invention comprises data collecting card and the computing machine that is connected with high-resolution imaging instrument.Data collecting card comprises interface unit, buffer unit, data transmission unit and control module; Interface unit is connected with imager, can be the Transistor-Transistor Logic level signal with the LVDS conversion of signals; Buffer unit comprises input buffer, cache module, output buffer; The input end of input buffer is connected with interface unit, and its output terminal is connected with cache module; The input end of output buffer is connected with cache module; Cache module is divided into a plurality of cache blocks; Data transmission unit comprises pci interface, PCI/PCI-E bridge; The output terminal of output buffer is connected with the PCI/PCI-E bridge by pci interface; The PCI/PCI-E bridge is used to realize the conversion of pci interface and PCI-E interface; Control module is used to realize the control of capture card metadata cache; Computing machine comprises PCI-E interface, calculator memory, processing unit and disk array; The PCI-E interface is used to connect PCI/PCI-E bridge and calculator memory; Calculator memory is divided into a plurality of cache blocks, its output termination disk array; Disk array is used to realize the computer data storage; Processing unit is used for computer data storage control.Computing machine has the internal memory of high bandwidth, can realize the fast access of data.The disk array of computing machine not only can be expanded hard drive space, has also improved the hard disk writing rate greatly.
In order to realize that data gather fast, interface unit specifically can comprise four circuit-switched data interface channels, and the data of high-resolution imaging instrument are issued by four paths; The corresponding data integration unit that is arranged between interface unit and buffer unit that also comprises of data collecting card, the data integration unit is used to realize the splicing and the packing of four circuit-switched data, and the multichannel data that receives is integrated into a complete image.The corresponding employing of PCI-E interface PCI-E * 4 interface shapes.Among the present invention, because of the real-time Transmission rate of view data is not less than 360Mbytes/s, therefore computer interface is selected PCI-E * 4 interfaces for use, for satisfying the bandwidth demand of PCI-E * 4 interfaces, selection is merged into single channel with two high-speed cache SDRAM and is used, be to solve the buffer memory of Large Volume Data, the present invention combines by SDRAM and FIFO's, and single port SDRAM is improved to twoport SDRAM.And the read-write process to SDRAM is optimized.When the method has guaranteed the hardware data reliability, improved the transfer rate of real-time system greatly.
Control module, input buffer, output buffer are realized that by FPGA input buffer is a high-speed synchronous first in first out buffer (FIFO); Because of shake loss of data takes place during for fear of computer processing data, destroy the reliability of system, in the present invention, cache module is two high-speed cache SDRAM, and output buffer is a high-speed synchronous first in first out buffer.
The data real-time collection method that high-resolution imaging instrument data real-time collecting system of the present invention is adopted may further comprise the steps:
Step 1] connection imager, capture card and computing machine;
Step 2] storage space of cache module is divided into n cache blocks, be designated as A0～A (n-1), and any time appointment write cache blocks and to read the cache blocks address different; The maximum input-buffer threshold value of set input buffer and minimum input-buffer threshold value, the output buffers threshold value of setting output buffer; Calculator memory is divided into m cache blocks, is designated as B0～B (m-1), and any time appointment write cache blocks and to read the cache blocks address different;
Step 3] control module control capture card carries out data acquisition; The processing unit control computer is carried out data acquisition;
Step 4] the closing image acquisition function;
Wherein:
Step 3] in control module adopt following steps to carry out data acquisition:
Step 310] control module judges that whether the input buffer state is greater than maximum input-buffer threshold value;
Step 311]
If the input buffer state is greater than maximum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, judge that then whether the output buffer state is greater than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judges whether the cache blocks of reading of appointment is readable;
If it is readable that this reads buffer stopper, then will specify the data of size to read in output buffer from this cache blocks, return step 310 then];
If it is not readable that this reads buffer stopper, then return step 310];
If the output buffer state greater than the output buffers threshold value, then returns step 310];
If the input buffer state less than maximum input-buffer threshold value, judges that then whether the output buffer state is less than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judges whether the cache blocks of reading of appointment is readable;
If it is readable that this reads cache blocks, then will specify the data of size to read in output buffer from this cache blocks, return step 310 then];
If it is not readable that this reads cache blocks, judge that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
If the output buffer state greater than the output buffers threshold value, judges that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write buffer stopper and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
Wherein:
Step 3] in processing unit adopt following steps to carry out data acquisition:
Step 320] processing unit judges whether the cache blocks of writing of appointment is to write in the calculator memory;
Step 321]
If this is write buffer stopper and can write, then will specify the data of size to write this cache blocks from output buffer, return step 320 then];
If this is write buffer stopper and can not write, judge then whether the cache blocks of reading of appointment is readable in the calculator memory;
If it is readable that this reads buffer stopper, then will specify the data form computer internal memory of size to be read into disk array, return step 320 then];
If it is not readable that this reads buffer stopper, then return step 320].
The data of above step middle finger sizing are meant the data that are not more than a cache blocks space size.
N value desirable 16 or 32; The m value gets 16 or 32; M value and n value can be identical also can be inequality.
Fig. 1 is the synoptic diagram of high-resolution imaging instrument data real-time collecting system of the present invention.System is made up of data collecting card and computing machine.Computing machine adopts WINDOWS XP operating system, and control data capture card and disk array can be realized collection and storage to data.Multichannel data from imager carries out the view data splicing by the FPGA in the data collecting card, form final real time data stream, again by PCI-E * 4 interfaces, flow into calculator memory with dma mode, write disk array in real time with dma mode again, I that formation can directly be used by the later stage application software, big surpasses the NTFS file of 2GB.
Fig. 2 is the structured flowchart of high-resolution imaging instrument data real-time collecting system of the present invention.Data collecting card directly is inserted on the PCI-E slot of computing machine, and imager links to each other with data collecting card, and the image data transmission that photographs is arrived capture card.Computing machine realizes that by device driver software interface with data collecting card, control gather and show in real time and realize other functions.
The process flow diagram that Fig. 3 reads, shows and store data for computing machine in the high-resolution imaging instrument data real-time collection method of the present invention.Whole software is developed under the VC environment and is finished, and mainly partly is made up of data collecting card driving, data acquisition, demonstration in real time and storing etc.Be that three functions are respectively opened up a thread in the present invention.Calculator memory of application transmits address date as application program heap district buffer memory with pointer between thread in collecting thread, avoids data invalid moving in calculator memory, has improved data messaging efficiency; Multithreading is realized multi-functional, carry out thread synchronization with message, can make and gather and be stored in executed in parallel in logic, operating in physically with two, the access time of bulk switches, the thread of smashing to minor time slice with operating system switches, and avoids data congestion limited buffer memory on data collecting card to pass and make it to overflow.In order to improve buffer efficiency, the present invention is divided into 16 read-write cache pieces with buffer memory, and A0～A15 or B0～B15, read-write operation respectively account for a piece, before writing on, read after, to 16 pieces circulation read-write.Such structure buffer memory utilization factor almost reaches 100%, far above the utilization factor of table tennis 50%.The cache blocks capacity can write hard disk cache with data less than the buffer memory of disk array at every turn fully, makes full use of the burst high bandwidth characteristic of hard disk, further improves read-write efficiency.
Fig. 4 is the structured flowchart of buffer unit in the high-resolution imaging instrument data real-time collection method of the present invention.High-speed cache is made of FIFO and two outside SDRAM of FPGA inside.Utilize two SDRAM to expand bandwidth among the present invention, make it and subsequent P CI-E * 4 Interface Matching.FIFO and SDRAM have formed the twoport high-speed cache jointly, have improved the real-time of system greatly.
Fig. 5 is the logical schematic of high-resolution imaging instrument data real-time collection method of the present invention.The calculator memory that overall rationally and effectively control can be optimized SDRAM uses.Data enable priority is the highest in overall situation control.
Fig. 6 is the read-write cache block space distribution principle figure of cache module.The SDRAM storage space is divided into the n piece, is designated as A0～A (n-1).Process in read and write only need guarantee not visit simultaneously a storage space, and the selection of n needs the utilization rate of balanced storage space, FIFO to select and real-time capture card speed preferred 16 and 32.
Claims (4)
1. the data real-time collection method of a high-resolution imaging instrument data real-time collecting system, it is characterized in that: it may further comprise the steps:
Step 1] connection imager, data collecting card and computing machine;
Described data collecting card comprises interface unit, buffer unit, data transmission unit and control module;
Described interface unit is connected with imager, can be the Transistor-Transistor Logic level signal with the LVDS conversion of signals;
Described buffer unit comprises input buffer, cache module, output buffer; The input end of described input buffer is connected with interface unit, and its output terminal is connected with cache module; The input end of described output buffer is connected with cache module; Described cache module is divided into a plurality of cache blocks;
Described data transmission unit comprises pci interface, PCI/PCI-E bridge; The output terminal of described output buffer is connected with the PCI/PCI-E bridge by pci interface; Described PCI/PCI-E bridge is used to realize the conversion of pci interface and PCI-E interface;
Described control module is used to realize the control of capture card metadata cache;
Described computing machine comprises PCI-E interface, calculator memory, processing unit and disk array; Described PCI-E interface is used to connect PCI/PCI-E bridge and calculator memory; Described calculator memory is divided into a plurality of cache blocks, its output termination disk array; Described disk array is used to realize the computer data storage; Described processing unit is used for computer data storage control;
Step 2] storage space of cache module is divided into n cache blocks, be designated as A0～A (n-1), and any time appointment write cache blocks and to read the cache blocks address different; The maximum input-buffer threshold value of set input buffer and minimum input-buffer threshold value, the output buffers threshold value of setting output buffer; Calculator memory is divided into m cache blocks, is designated as B0～B (m-1), and any time appointment write cache blocks and to read the cache blocks address different;
Step 3] control module control capture card carries out data acquisition; The processing unit control computer is carried out data acquisition;
Step 4] the closing image acquisition function;
Wherein:
Step 3] in control module adopt following steps to carry out data acquisition:
Step 310] control module judges that whether the input buffer state is greater than maximum input-buffer threshold value;
Step 311]
If the input buffer state is greater than maximum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write cache blocks and can write, then will specify the data of size to write this cache blocks from input buffer,
Return step 310 then];
If this is write cache blocks and can not write, judge that then whether the output buffer state is greater than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judge appointment read delay
Whether counterfoil is readable;
If it is readable that this reads cache blocks, then will specify the data of size to read in output terminal from this cache blocks
Buffer returns step 310 then];
If it is not readable that this reads cache blocks, then return step 310];
If the output buffer state greater than the output buffers threshold value, then returns step 310];
If the input buffer state less than maximum input-buffer threshold value, judges that then whether the output buffer state is less than the output buffers threshold value;
If the output buffer state is less than the output buffers threshold value, then control module judges whether the cache blocks of reading of appointment is readable;
If it is readable that this reads cache blocks, then will specify the data of size to read in output buffer from this cache blocks, return step 310 then];
If it is not readable that this reads cache blocks, judge that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write cache blocks and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write cache blocks and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
If the output buffer state greater than the output buffers threshold value, judges that then whether the input buffer state is greater than minimum input-buffer threshold value;
If the input buffer state is greater than minimum input-buffer threshold value, then control module judges whether the cache blocks of writing of appointment is to write;
If this is write cache blocks and can write, then will specify the data of size to write this cache blocks from input buffer, return step 310 then];
If this is write cache blocks and can not write, then return step 310];
If the input buffer state less than minimum input-buffer threshold value, then returns step 310];
Wherein:
Step 3] in processing unit adopt following steps to carry out data acquisition:
Step 320] processing unit judges whether the cache blocks of writing of appointment is to write in the calculator memory;
Step 321]
If this is write cache blocks and can write, then will specify the data of size to write this cache blocks from output buffer, return step 320 then];
If this is write cache blocks and can not write, judge then whether the cache blocks of reading of appointment is readable in the calculator memory;
If it is readable that this reads cache blocks, then will specify the data form computer internal memory of size to be read into disk array, return step 320 then];
If it is not readable that this reads cache blocks, then return step 320].
2. data real-time collection method according to claim 1 is characterized in that: the described data of size of specifying are meant the data that are not more than a cache blocks space size.
3. data real-time collection method according to claim 2 is characterized in that: described n value gets 16 or 32; Described m value gets 16 or 32.
4. data real-time collection method according to claim 2 is characterized in that: described n value gets 16 or 32; Described m value is identical with the n value.
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| CN103575391A (en) * | 2012-07-26 | 2014-02-12 | 睿励科学仪器（上海）有限公司 | Spectrometer control circuit and spectrometer |
| CN104597063A (en) * | 2015-02-03 | 2015-05-06 | 于钦密 | CT imaging control system |
| CN105894075A (en) * | 2016-04-05 | 2016-08-24 | 广州市盟将威信息科技有限公司 | Inso data integrated card |
| CN108919091B (en) * | 2018-06-20 | 2021-02-19 | 中国科学院西安光学精密机械研究所 | Aging screen lifting system of video ADC device |
| CN109634882A (en) * | 2018-11-20 | 2019-04-16 | 山东超越数控电子股份有限公司 | A kind of High Speed Data Acquisition card based on FPGA |
| CN109996104A (en) * | 2019-04-22 | 2019-07-09 | 北京奇艺世纪科技有限公司 | A kind of video broadcasting method, device and electronic equipment |
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