CN102819822B - A kind of shortwave non refrigerating infrared imaging device - Google Patents
A kind of shortwave non refrigerating infrared imaging device Download PDFInfo
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- CN102819822B CN102819822B CN201110424230.7A CN201110424230A CN102819822B CN 102819822 B CN102819822 B CN 102819822B CN 201110424230 A CN201110424230 A CN 201110424230A CN 102819822 B CN102819822 B CN 102819822B
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Abstract
The present invention relates to a kind of shortwave non refrigerating infrared imaging device, this device comprises the detector drive unit driving the work of short-wave infrared detector, the output terminal of drive unit is connected with the driving input end of detector, the signal input part of detector is connected with detector temperature control device, the output terminal of detector is connected with the input end of detector data harvester, the output of data collector is connected with the input end of Infrared images pre-processing device, the output terminal of pretreatment unit respectively with the input end of drive unit, the signal input part of video change-over device is connected with PC control.Shortwave non refrigerating infrared imaging device of the present invention has the advantages that integrated level is high, volume is little, low in energy consumption, reliability is high, make the efficiency of image procossing higher by reducing alternately between each process chip, speed is faster, real-time and controllability are stronger, can meet the strict demand of various system to indexs such as short-wave infrared image device structure size, power consumption and electromagnetic compatibilities.
Description
Technical field
The invention belongs to image processing field, relate to a kind of shortwave non refrigerating infrared imaging device of infrared image processing technology.
Background technology
Short-wave infrared focus planardetector is a dark horse has become one of focus of infrared focal plane imaging technical field.Short wave infrared radiation refers to that wavelength is the infrared radiation of 0.76 ~ 3.0 μm, is extensively present in occurring in nature.Its main source has physical environment reflection, high temp objects initiatively radiation, artificial short-wave infrared light source etc.Along with the development of shortwave non-refrigerated infrared detector, short-wave infrared imaging technique has now been widely used in various field.For visual-short-wave infrared night vision, the detection of short-wave infrared active illumination light source, camouflage identification, laser guidance and laser radar etc. on military; Survey of deep space is used successfully in space exploration field; For detecting earth mineral resources in remote sensing, the change of monitoring soil, vegetation water cut and Atmospheric composition, Crop Estimation and preventing and reducing natural disasters; Can be used as various short-wave infrared spectrometer in commercial, short-wave infrared flaw detection, short-wave infrared measure chip online automatic detection etc. in content, semiconductor devices manufacturing industry; And started more and more to be applied to biomedical sector.
Summary of the invention
The object of this invention is to provide that a kind of circuit structure is little, Systematical control and the simple a kind of shortwave non refrigerating infrared imaging device of sequential logic.
For achieving the above object, the present invention adopts following technical scheme: a kind of shortwave non refrigerating infrared imaging device, this device comprises the detector drive unit driving the work of short-wave infrared detector, the output terminal of described detector drive unit is connected with the driving input end of short-wave infrared detector, the temperature control signals input end of short-wave infrared detector is connected with detector temperature control device, the output terminal of described short-wave infrared detector is connected with the input end of detector data harvester, the output of detector data harvester is connected with the input end of Infrared images pre-processing device, the output terminal of Infrared images pre-processing device respectively with the input end of detector drive unit, the signal input part of video change-over device is connected with PC control, the output terminal of the signal of described video change-over device is connected with a monitor.
Described Infrared images pre-processing device comprises Non Uniformity Correction of Infrared Image coefficients calculation block, nonuniformity correction module and carries out with host computer the communication module that communicates, and infrared image non-homogeneous calibration coefficients calculation block adopts and operates in program module on the soft core of the inner SOPC of FPGA to calculate the nonuniformity correction coefficient of infrared image; The output terminal of nonuniformity correction module is connected with infrared image blind element replacement module, infrared image statistics with histogram module, infrared image greyscale transformation module in turn, and the output terminal of infrared image greyscale transformation module is by exporting after the calculating of grey scale mapping table.
Described Infrared images pre-processing device adopts ALTERA company field programmable device EP3C80F484I6.
Described detector drive unit adopts exact linear power drives chip to produce short-wave infrared detector driving voltage.
Described infrared image blind element replacement module adopts medium filtering device determination blind element to replace position.
Described infrared image greyscale transformation module adopts the high-low threshold of automatic threshold decision maker determination greyscale transformation.
Described detector temperature control device adopts simulation proportional integral derivative control method to control the focal plane working temperature of detector in real time.
Shortwave non refrigerating infrared imaging device of the present invention has the advantages that integrated level is high, volume is little, low in energy consumption, reliability is high, make the efficiency of image procossing higher by reducing alternately between each process chip, speed is faster, real-time and controllability are stronger, can meet the strict demand of various system to indexs such as short-wave infrared image device structure size, power consumption and electromagnetic compatibilities.
Accompanying drawing explanation
Fig. 1 is shortwave non refrigerating infrared imaging schematic diagram of device;
Fig. 2 is Infrared images pre-processing schematic diagram of device;
Fig. 3 is SOPC software flow pattern;
Fig. 4 is shortwave non refrigerating infrared imaging device embodiment schematic diagram of the present invention.
Embodiment
Be illustrated in figure 1 the schematic diagram of shortwave non refrigerating infrared imaging device of the present invention, as seen from the figure, this device comprises the detector drive unit driving the work of short-wave infrared detector, the output terminal of described detector drive unit is connected with the driving input end of short-wave infrared detector, the temperature control signals input end of short-wave infrared detector is connected with detector temperature control device, the output terminal of described short-wave infrared detector is connected with the input end of detector data harvester, the output of detector data harvester is connected with the input end of Infrared images pre-processing device, the output terminal of Infrared images pre-processing device respectively with the input end of detector drive unit, the signal input part of video change-over device is connected with PC control, the output terminal of the signal of described video change-over device is connected with a monitor.
Video change-over device is used for pretreated infrared image to carry out Video Quality Metric, and it has the effect of two aspects: pretreated infrared signal is carried out Video Composition by (1); (2) signal of Video Composition is carried out digital-to-analog conversion.
Be illustrated in figure 2 the schematic diagram of Infrared images pre-processing device of the present invention, as seen from the figure, this device comprises Non Uniformity Correction of Infrared Image coefficients calculation block, utilize the nonuniformity correction module that result of calculation carries out real time correction to infrared image and the communication module communicated with host computer, the input of nonuniformity correction coefficients calculation block and nonuniformity correction module is infrared signal input, and the result of calculation of nonuniformity correction coefficients calculation block is stored in coefficient memory; The output terminal of nonuniformity correction module is connected with infrared image blind element replacement module, infrared image statistics with histogram module, infrared image greyscale transformation module in turn, and the output terminal of infrared image greyscale transformation module is by exporting after the calculating of grey scale mapping table.
The detector drive unit of short-wave infrared detector work is driven to adopt exact linear power drives chip to produce short-wave infrared detector driving voltage in the present invention; Shortwave non-refrigerated infrared detector temperature control equipment adopts simulation proportional integral derivative control method to control the focal plane working temperature of shortwave non-refrigerated infrared detector in real time.At Infrared images pre-processing device, infrared image non-homogeneous calibration coefficients calculation block adopts and operates in program module on the soft core of the inner SOPC of FPGA to calculate the nonuniformity correction coefficient of infrared image; Infrared image blind element replacement module adopts medium filtering device determination blind element to replace position; Infrared image greyscale transformation module adopts the high-low threshold of automatic threshold decision maker determination greyscale transformation.
The device of short-wave infrared detector work is driven to provide the time series pulse signals of driving voltage and agreement for short-wave infrared detector, gather the device of short-wave infrared detector output data, gather infrared eye successively according to the frequency of operation of short-wave infrared detector to export, and by collection result order input Infrared images pre-processing device, the work of Infrared images pre-processing device is divided into non-real-time mode and real-time mode two states: under non-real-time mode, pretreatment unit adopts the soft core of SOPC to complete nonuniformity correction coefficient calculations, and by the result of calculation of correction coefficient write coefficient memory, under real-time mode, first nonuniformity correction device carries out nonuniformity correction according to correction coefficient to infrared signal, and then SOC (system on a chip) adopts the method determination blind element position of 3 × 3 window medium filterings, and replaces blind element with the mean value of 9 pixels in window.The infrared picture data of infrared image statistics with histogram module real-time reception after nonuniformity correction and blind element are replaced, and with the histogram of the every two field picture of form real-time statistics of data volume, then by the statistics with histogram result of greyscale transformation module according to every two field picture, calculate the high-low threshold of greyscale transformation in real time, finally carry out greyscale transformation according to high-low threshold, and transformation results is write greyscale transformation storer.
Shortwave non-refrigerated infrared detector temperature control equipment adopts simulation proportional integral derivative method to control the focal plane working temperature of non-refrigerated infrared detector, control device reads the output of the temp diode of reflection focal plane temperature in real time and is compared with the temperature value that sets up an office by the temperature value of reading, is worked by comparative result actuation temperature control device.
With reference to Fig. 3, for ensureing the real-time of system works, short-wave infrared image processing system software starting as starting point carries out data acquisition, pre-service and Video Quality Metric work with every frame signal.After every frame signal starts, first system initialization and self-inspection is carried out, inquire about again and whether have new frame to start, if had, then carry out the collection of infrared signal, judge that whether host computer is by communication module sending mode switching command, if receive mode handover command, adopt the nonuniformity correction coefficient calculation means of SOC (system on a chip), at once by the write of freeze frame device forbidden storage device, then carry out the calculating of nonuniformity correction coefficient according to the data in storer, turn back to frame inquiring position after having calculated and wait for that next frame arrives; If do not receive mode handover command, then perform the operations under real-time mode successively: nonuniformity correction---blind element replacement---infrared signal greyscale transformation, finally the signal after conversion is carried out Video Quality Metric output, turn back to frame inquiring position and wait for that next frame arrives.
Shortwave non refrigerating infrared imaging device embodiment schematic diagram of the present invention as shown in Figure 4, the Infrared images pre-processing device of this device adopts ALTERA company field programmable device EP3C80F484I6, field programmable device is connected with short-wave infrared detector by analog-to-digital conversion module AD9240, and the input end of short-wave infrared detector is connected to detector drive unit and detector temperature control module ADN8830; The output terminal of field programmable device is connected with host computer by serial communication module XL2550 on the one hand, is connected on the other hand by video conversion module ADV7123 with monitor.Field programmable device EP3C80F484I6 is also circumscribed with Configuration Control Unit EPM7128, program storage AM29LV065D, data-carrier store WEDPS512K32, double port memory IDT70T633 and active crystal oscillator.
Above-mentioned field programmable device EP3C80F484I6 comprises greyscale transformation storer in Clock management module, SOPC soft-core processor, drive control module, data acquisition and control module, nonuniformity correction module, statistics with histogram module, Video Composition controller, double port memory controller, synchronizing signal controller, sheet.Its inner interconnected relationship is: Clock management module is connected with greyscale transformation memory controller in SOC (system on a chip) processor, drive control module, data acquisition and control module, nonuniformity correction device, statistics with histogram module, Video Composition controller, double port memory controller, synchronizing signal controller, sheet, SOPC soft-core processor is connected with greyscale transformation memory controller in statistics with histogram module, synchronizing signal controller, sheet, and real time signal processing module is connected with data acquisition and control module, double port memory controller.
Programming device EP3C80F484I6 is the core of shortwave non refrigerating infrared imaging device, has been responsible for a series of activities such as the Timing driver of short-wave infrared detector, data acquisition module driving, nonuniformity correction, statistics with histogram and Video Composition.SOPC soft-core processor wherein completes the work such as calculating, histogram equalization, serial communication of nonuniformity correction coefficient.Data-carrier store and program storage support above-mentioned work as the peripheral components of programming device.Double port memory IDT70T633 is the frame memory of short-wave infrared image, for keeping in video image when image procossing.The simulating signal that analog-to-digital conversion module collection short-wave infrared detector exports is converted into the digital signal that 14bit exports.Treated digital video signal is converted to PAL-system analog video and outputs on monitor by Video Output Modules.Temperature control modules gathers the output of the temperature sensor of detector output terminal, controls under detector is operated in stable temperature conditions in real time according to output valve.
Claims (6)
1. a shortwave non refrigerating infrared imaging device, it is characterized in that: this device comprises short-wave infrared detector and drives the detector drive unit of short-wave infrared detector work, detector temperature control device, detector data harvester, Infrared images pre-processing device, video change-over device, host computer and monitor, the output terminal of described detector drive unit is connected with the driving input end of short-wave infrared detector, the temperature control signals input end of short-wave infrared detector is connected with detector temperature control device, the output terminal of described short-wave infrared detector is connected with the input end of detector data harvester, the output of detector data harvester is connected with the input end of Infrared images pre-processing device, the output terminal of Infrared images pre-processing device respectively with the input end of detector drive unit, the signal input part of video change-over device is connected with PC control, the output terminal of the signal of described video change-over device is connected with a monitor, described Infrared images pre-processing device comprises Non Uniformity Correction of Infrared Image coefficients calculation block, nonuniformity correction module and carries out with host computer the communication module, infrared image blind element replacement module, infrared image statistics with histogram module, infrared image greyscale transformation module and the grey scale mapping table that communicate, infrared image non-homogeneous calibration coefficients calculation block adopt operate in FPGA inside sheet on program module on the soft core of programmable system SOPC to calculate the nonuniformity correction coefficient of infrared image, the output terminal of nonuniformity correction module is connected with infrared image blind element replacement module, infrared image statistics with histogram module, infrared image greyscale transformation module in turn, and the output terminal of infrared image greyscale transformation module is by exporting after the calculating of grey scale mapping table.
2. shortwave non refrigerating infrared imaging device according to claim 1, is characterized in that: described Infrared images pre-processing device adopts ALTERA company field programmable device EP3C80F484I6.
3. shortwave non refrigerating infrared imaging device according to claim 1, is characterized in that: described detector drive unit adopts exact linear power drives chip to produce short-wave infrared detector driving voltage.
4. shortwave non refrigerating infrared imaging device according to claim 2, is characterized in that: described infrared image blind element replacement module adopts medium filtering device determination blind element to replace position.
5. shortwave non refrigerating infrared imaging device according to claim 1, is characterized in that: described infrared image greyscale transformation module adopts the high-low threshold of automatic threshold decision maker determination greyscale transformation.
6. shortwave non refrigerating infrared imaging device according to claim 1, is characterized in that: described detector temperature control device adopts simulation proportional integral derivative control method to control the focal plane working temperature of detector in real time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103065281A (en) * | 2011-12-17 | 2013-04-24 | 中国航空工业集团公司洛阳电光设备研究所 | Short wave infrared image intensification method and device based on field programmable gate array (FPGA) |
| CN103065280A (en) * | 2012-12-13 | 2013-04-24 | 中国航空工业集团公司洛阳电光设备研究所 | Method and device of non-uniformed correction for short wave infrared detector |
| CN103268594B (en) * | 2013-05-17 | 2016-03-23 | 山东神戎电子股份有限公司 | A kind of blind element replacement method of infrared thermal imagery instrument system |
| CN104316203A (en) * | 2014-10-20 | 2015-01-28 | 重庆邮电大学 | Non-refrigeration infrared focal plane array driving control circuit integration design method |
| CN106500849A (en) * | 2016-12-09 | 2017-03-15 | 国家电网公司 | A kind of infrared imaging temperature measuring sensor |
| CN108024074B (en) * | 2017-10-17 | 2020-05-01 | 中国航空工业集团公司洛阳电光设备研究所 | Miniaturized infrared imaging method based on SOPC |
| CN112651903B (en) * | 2020-11-12 | 2022-09-16 | 苏州长风航空电子有限公司 | Thermal infrared imager image preprocessing system and preprocessing method thereof |
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