CN101979969B - Multi-channel digital signal processor-based flow field reconstruction computing method - Google Patents
Multi-channel digital signal processor-based flow field reconstruction computing method Download PDFInfo
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Abstract
The invention discloses a multi-channel digital signal processor-based flow field reconstruction computing method. The spectral radiation information of flow fields to be detected, such as an aviation engine plume and the like, is received by a multi-channel planar array photoelectric sensor. The method comprises the following steps that: firstly, a micro control unit controls a main program to start a multi-channel analog-to-digital converting unit to convert the measurement of a vector analog signal to the measurement of a vector digital signal; secondly, a multi-channel data cache unit caches the data of the measurement of the vector; and finally, projection matrix data is stored in an external data storage. The method has the advantage that: based on multi-channel DSP parallel, tomographic reconstruction algorithm is realized; compared with that of the traditional pure software-based method, the reconstruction computing time of the method is saved; and the real-time property of detection is improved.
Description
Technical field
The present invention relates to a kind of reconstructing flow field computing method of digital signal processor, relate in particular to a kind of reconstructing flow field computing method based on the multi-path digital signal processor.
Background technology
During the three-dimensional Temperature Distribution in flow field such as aeromotor plume detected under atmospheric environment, emission spectral chromatography was a kind of feasible detection method.During detecting, emission spectral chromatography need relate to collection, the tomographic reconstruction computing of emission spectra data, the processes such as demonstration of tomographic results.Wherein the tomographic reconstruction operand is very big, adopts the method for pure software need consume great amount of time, can't guarantee the real-time that detects.
Summary of the invention
The object of the present invention is to provide a kind of reconstructing flow field computing method based on the multi-path digital signal processor; This method adopts computings such as the matrix multiplication of multichannel floating-point signal processor in rebuilding, addition, and realizes the flow process control that whole reconstruction is calculated by micro-control unit MCU.Rebuild and calculate required data by external data memory, multichannel AD conversion unit and the storage of multichannel data buffer unit.Reconstructed results is exported to computing machine through RS232 serial communication unit, realizes result's demonstration and storage.
The present invention realizes like this; Reconstructing flow field device based on the multi-path digital signal processor; It comprises face array photoelectric sensor, AD conversion unit, data buffer storage unit, floating-point signal processor, serial communication unit, computing machine, external data memory, micro-control unit; It is characterized in that the multichannel face array photoelectric sensor AD conversion unit that connects one to one; The multichannel AD conversion unit data buffer storage unit that connects one to one, the multichannel data buffer unit floating-point signal processor that connects one to one, the multichannel floating-point signal processor connects micro-control unit, external data memory and serial communication unit jointly respectively; The serial communication unit connects computing machine, the corresponding respectively multichannel AD conversion unit that connects of micro-control unit.
Method for reconstructing flow field based on the multi-path digital signal processor: the aeromotor plume waits for that the spectral radiance information of flow measurement field is received by the multichannel face array photoelectric sensor; At first; The micro-control unit controls master routine starts the multichannel AD conversion unit and measures vectorial simulating signal to the conversion of measuring vectorial digital signal; Measure the metadata cache of vector then by the multichannel data buffer unit; Externally in the data-carrier store, the micro-control unit controls master routine starts the multichannel floating-point signal processor to the projection matrix data storage, carries out matrix multiplication, the computing of addition reconstruction iteration by measurement vector data and the projection matrix data in the external data memory that floating-point signal processor is called in the multichannel data buffer unit; And the intermediate reconstructed vector data is delivered to external data memory store; The micro-control unit controls master routine judges that whether the iterative computation termination condition satisfies, and as not satisfying, then continues the reconstruction iteration computing; As satisfying, then export reconstructed results to computing machine through the serial communication unit by floating-point signal processor, computing machine is realized the demonstration and the storage of reconstructed results through host computer procedure then.
Advantage of the present invention is: this method is based on the computing of multichannel DSP Parallel Implementation tomographic reconstruction, and tradition is saved the time of rebuilding computing based on the method for pure software, has improved the real-time that detects.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Face array photoelectric sensor 2, AD conversion unit 3, data buffer storage unit 4, Floating-point DSP TMS320C67115, serial communication unit 6, computing machine 7, external data memory 8, micro-control unit in the drawings, 1,
Embodiment
As shown in Figure 1; The aeromotor plume waits for that the spectral radiance information of flow measurement field is received by multichannel face array photoelectric sensor 1; At first; Micro-control unit 8 control master routines start multichannel AD conversion unit 2 and measure vectorial simulating signal to the conversion of measuring vectorial digital signal, are measured the metadata cache of vector then by multichannel data buffer memory list 3.The projection matrix data storage is externally in the data-carrier store 7; Micro-control unit 8 control master routines start multichannel Floating-point DSP TMS320C67114; Measurement vector data and the projection matrix data in the external data memory 7 by Floating-point DSP TMS320C67114 calls in the multichannel data buffer unit 3 are carried out reconstruction iteration computings such as matrix multiplication, addition, and the intermediate reconstructed vector data is delivered to external data memory 7 storages.Micro-control unit 8 control master routines judge that whether the iterative computation termination condition satisfies, and as not satisfying, then continues the reconstruction iteration computing; As satisfying, then export reconstructed results to computing machine 6 through RS232 serial communication unit 5 by Floating-point DSP TMS320C67114, computing machine 6 is realized the demonstration and the storage of reconstructed results through host computer procedure then.
The device of realizing this invention is: several face array photoelectric sensor 1 AD conversion unit 2 that connects one to one; Several AD conversion unit 2 data buffer storage unit 3 that connects one to one; The several data buffer storage unit 3 Floating-point DSP TMS320C67114 that connects one to one; Several Floating-point DSP TMS320C67114 connects micro-control unit 8, external data memory 7 and serial communication unit 5 jointly respectively; Serial communication unit 5 connects computing machine 6, the corresponding respectively several AD conversion unit 2 that connects of micro-control unit 8.
Claims (1)
1. reconstructing flow field computing method based on the multi-path digital signal processor is characterized in that:
This method is used the reconstructing flow field device based on the multi-path digital signal processor, and this device comprises:
Face array photoelectric sensor, AD conversion unit, data buffer storage unit, floating-point signal processor, serial communication unit, computing machine, external data memory, micro-control unit; The multichannel face array photoelectric sensor AD conversion unit that connects one to one; The multichannel AD conversion unit data buffer storage unit that connects one to one; The multichannel data buffer unit floating-point signal processor that connects one to one; The multichannel floating-point signal processor connects micro-control unit, external data memory and serial communication unit jointly respectively, and the serial communication unit connects computing machine, the corresponding respectively multichannel AD conversion unit that connects of micro-control unit; This method comprises:
The aeromotor plume waits for that the spectral radiance information of flow measurement field is received by the multichannel face array photoelectric sensor; At first; The micro-control unit controls master routine starts the multichannel AD conversion unit and measures vectorial simulating signal to the conversion of measuring vectorial digital signal; Measure the metadata cache of vector then by the multichannel data buffer unit; Externally in the data-carrier store, the micro-control unit controls master routine starts the multichannel floating-point signal processor to the projection matrix data storage, carries out matrix multiplication, the computing of addition reconstruction iteration by measurement vector data and the projection matrix data in the external data memory that floating-point signal processor is called in the multichannel data buffer unit; And the intermediate reconstructed vector data is delivered to external data memory store; The micro-control unit controls master routine judges that whether the iterative computation termination condition satisfies, and as not satisfying, then continues the reconstruction iteration computing; As satisfying, then export reconstructed results to computing machine through the serial communication unit by floating-point signal processor, computing machine is realized the demonstration and the storage of reconstructed results through host computer procedure then.
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| CN1776389A (en) * | 2005-06-01 | 2006-05-24 | 中国科学院光电技术研究所 | Transient three-dimensional flow field optical chromatography measuring system |
| EP1105814B1 (en) * | 1999-06-14 | 2007-11-28 | Koninklijke Philips Electronics N.V. | Method of determining an intrinsic spectrum from a measured spectrum |
| CN101156059A (en) * | 2005-04-01 | 2008-04-02 | 3M创新有限公司 | Multiplex fluorescence detection device having removable optical modules |
| CN201170771Y (en) * | 2007-12-17 | 2008-12-24 | 南昌航空大学 | Image-rebuilding device for optical chromatography detection |
| CN201698496U (en) * | 2010-07-14 | 2011-01-05 | 南昌航空大学 | Flow field reconstruction apparatus based on a plurality of data signal processor |
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| US20070171409A1 (en) * | 2006-01-04 | 2007-07-26 | Xinghua Wang | Method and apparatus for dense spectrum unmixing and image reconstruction of a sample |
| US7587285B2 (en) * | 2007-08-31 | 2009-09-08 | Life Technologies Corporation | Method for identifying correlated variables |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1105814B1 (en) * | 1999-06-14 | 2007-11-28 | Koninklijke Philips Electronics N.V. | Method of determining an intrinsic spectrum from a measured spectrum |
| CN101156059A (en) * | 2005-04-01 | 2008-04-02 | 3M创新有限公司 | Multiplex fluorescence detection device having removable optical modules |
| CN1776389A (en) * | 2005-06-01 | 2006-05-24 | 中国科学院光电技术研究所 | Transient three-dimensional flow field optical chromatography measuring system |
| CN201170771Y (en) * | 2007-12-17 | 2008-12-24 | 南昌航空大学 | Image-rebuilding device for optical chromatography detection |
| CN201698496U (en) * | 2010-07-14 | 2011-01-05 | 南昌航空大学 | Flow field reconstruction apparatus based on a plurality of data signal processor |
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| 万雄.多光谱辐射层析重建三维火焰温度场.《光学学报》.2003,第23卷(第9期),1100-1104. * |
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