CN205304963U - Infrared image gathers processing system - Google Patents
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- CN205304963U CN205304963U CN201521105017.XU CN201521105017U CN205304963U CN 205304963 U CN205304963 U CN 205304963U CN 201521105017 U CN201521105017 U CN 201521105017U CN 205304963 U CN205304963 U CN 205304963U
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Abstract
The utility model discloses an infrared image gathers processing system, this system includes: infrared detector, AD temperature divertor, AD data converter, offset voltage output circuit, TEC controller and FPGA, the FPGA internal integration image acquisition controller, infrared detector links to each other with the image acquisition controller through AD temperature divertor, AD data converter respectively, the image acquisition controller links to each other with infrared detector through offset voltage output circuit, TEC controller respectively, offset voltage output circuit is used for providing offset voltage for infrared detector, the TEC controller is used for adjusting infrared detector's temperature. This system introduces the mode of processing of independent two AD conversions, separates data conversion and temperature conversion, and independent two AD converting circuit make the image acquisition controller can obtain accurate temperature information in real time to the assurance is more accurate to infrared detector's temperature control, reduces infrared detector data collection's distortion.
Description
Technical field
This utility model relates to infrared image acquisition technical field, in particular it relates to a kind of infrared image acquisition processes system.
Background technology
All objects in nature, as long as its temperature is higher than absolute zero, will constantly to emission radiant energy. The infra-red radiation that object is launched naturally can be converted into visible infrared image by infrared image capturing system, because the different parts of different objects or same object has different infrared signatures, so the image obtained on infrared image acquisition instrument also differs, so that the visually-perceptible range expansion of human eye is to infrared radiation spectrum district invisible to the naked eye.
The infra-red radiation of collected thing focuses on the focal plane of Infrared Detectors through infrared lens, and heat radiation is converted to analog electrical signal by Infrared Detectors, through the reading circuit of Infrared Detectors, then by A/D converter, analog electrical signal is converted to digital signal. Then utilize modern digital image processing to process in real time, improve its image quality. Finally being shown in LCD screen by image, such human eye is just it is clear that the infrared image of collected thing.
Traditional image acquisition and processing platform rely on CPU or dsp chip as core devices mostly, control image acquisition, storage and calculation process, are characterized in adopting CPU or DSP to carry out serialized process. First CPU controls Infrared Detectors and carries out infrared image acquisition, again through CPU or DSP itself, view data is carried out Digital Image Processing after obtaining view data.
By the consideration to the research of above prior art and actual application environment, it is very easy to find prior art and has the disadvantage in that (1) is in infrared image acquisition process, Infrared Detectors is easily influenced by temperature, owing to temperature can be produced when Infrared Detectors itself works, cause that distortion is occurred in thermal-radiating analog-converted, thus affecting the picture quality of collection.(2) CPU and DSP cannot meet some and comprises complicated algorithm and the Digital Image Processing of real-time high flow capacity, then can affect the efficiency of whole system with CPU and DSP for core.
Utility model content
This utility model is to be easily caused image fault defect to overcome in prior art mid-infrared image acquisition process, according to an aspect of the present utility model, it is proposed to a kind of infrared image acquisition processes system.
A kind of infrared image acquisition that this utility model embodiment provides processes system, including: Infrared Detectors, AD temperature divertor, AD data converter, bias voltage output circuit, TEC controller and FPGA, FPGA are internally integrated image capture controller;
Infrared Detectors is connected with image capture controller respectively through AD temperature divertor, AD data converter; AD temperature divertor for being converted to digital temperature data by the analog temperature data of Infrared Detectors, and sends digital temperature data to image capture controller; AD data converter for being converted to data image signal by the analog picture signal of Infrared Detectors collection, and sends digital signal to image capture controller;
Image capture controller is connected with Infrared Detectors respectively through bias voltage output circuit, TEC controller; Bias voltage output circuit is for providing bias voltage for Infrared Detectors; TEC controller is for adjusting the temperature of Infrared Detectors.
In technique scheme, bias voltage output circuit is also connected with TEC controller; TEC controller is additionally operable to gather the current environmental temperature of Infrared Detectors, and adjusts the temperature of Infrared Detectors according to current environmental temperature.
In technique scheme, adjust the temperature of Infrared Detectors according to current environmental temperature, particularly as follows:
The digital temperature data that image capture controller sends according to AD temperature divertor, adjust the output control signal to bias voltage output circuit in real time, control bias voltage output circuit and are supplied to the magnitude of voltage of TEC controller.
In technique scheme, FPGA also includes image processing module;
The data image signal collected is sent to image processing module by image capture controller, and image processing module is for processing data image signal.
In technique scheme, FPGA is provided with LCD interface, and the picture signal after process is sent to outside LCD display by FPGA by LCD interface.
In technique scheme, data image signal is processed, including:
One or more data image signal being carried out in nonuniformity correction, medium filtering, temperature identification, image enhaucament, cursor superposition process.
In technique scheme, FPGA also includes: buffer, depositor, reset circuit, and FPGA external harmoniousness flash memory.
In technique scheme, AD temperature divertor and AD data converter are ADS850, and bias voltage output circuit is D/A converter AD5324.
A kind of infrared image acquisition that this utility model embodiment provides processes system, introduce the processing mode of independent double; two AD conversion, data conversion and temperature transition are separated, independent converter is used to change respectively, view data and temperature data are separated, ensureing not temperature influence during image real time transfer, processing accuracy is higher. Independent double; two A/D convertor circuit makes image capture controller can obtain temperature information accurately in real time, thus it is more accurate to ensure that the temperature to Infrared Detectors controls, reduces Infrared Detectors and gathers the distortion of data.Meanwhile, the infrared image acquisition that this utility model embodiment provides processes system and adopts FPGA process, while assurance function and performance, eliminates this high price device of DSP, saves overall cost; Processing speed can be improved simultaneously.
Other features and advantages of the utility model will be set forth in the following description, and, partly become apparent from description, or understand by implementing this utility model. The purpose of this utility model and other advantages can be realized by structure specifically noted in the description write, claims and accompanying drawing and be obtained.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, is not intended that restriction of the present utility model together with embodiment of the present utility model. In the accompanying drawings:
Fig. 1 is the first structure chart of this utility model embodiment mid-infrared image collection processing system;
Fig. 2 is the second structure chart of this utility model embodiment mid-infrared image collection processing system;
Fig. 3 is the structure chart of image processing module in this utility model embodiment;
Fig. 4 is the 3rd structure chart of this utility model embodiment mid-infrared image collection processing system;
Fig. 5 is the structure chart of this utility model embodiment one mid-infrared image collection processing system.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, it is to be understood that protection domain of the present utility model is not by the restriction of detailed description of the invention.
According to this utility model embodiment, provide a kind of infrared image acquisition and process system, Fig. 1 is the structure chart of this system, specifically include: Infrared Detectors 10, AD temperature divertor 20, AD data converter 30, bias voltage output circuit 40, TEC (ThermoelectricCooler, semiconductor cooler) controller 50 and FPGA (FieldProgrammableGateArray, i.e. field programmable gate array), FPGA is internally integrated image capture controller 60.
Concrete, shown in Figure 1, Infrared Detectors 10 is connected with image capture controller 60 respectively through AD temperature divertor 20, AD data converter 30. Wherein, AD temperature divertor 20 for being converted to digital temperature data by the analog temperature data of Infrared Detectors 10, and sends digital temperature data to image capture controller 60; The analog temperature data of this Infrared Detectors 10 are specially ambient temperature or the chip internal temperature of Infrared Detectors. AD data converter 30 for being converted to data image signal by the analog picture signal that Infrared Detectors 10 gathers, and sends digital signal to image capture controller 60; Namely this entire image data signal can be sent to follow-up processing module after receiving a width complete digital image signal and process by image capture controller 60.
Meanwhile, image capture controller 60 is connected with Infrared Detectors 10 respectively through bias voltage output circuit 40, TEC controller 50; Bias voltage output circuit 40 is for providing bias voltage for Infrared Detectors 10; TEC controller 50 is for adjusting the temperature of Infrared Detectors 10.
Wherein, TCE controller is heat energy switching controller, image capture controller 60 controls the switch (SHDN in Fig. 1) of TEC controller 50, and TEC controller 50 adjusts the temperature of this Infrared Detectors according to the current environmental temperature of the Infrared Detectors 10 detected.Bias voltage output circuit 40 is for providing bias voltage for Infrared Detectors 10 so that Infrared Detectors 10 normal operation. The image capture controller 60 work schedule according to Infrared Detectors, produces image acquisition control signal so that the continuous print that Infrared Detectors can be real-time exports infrared picture data and temperature data in real time.
A kind of infrared image acquisition that this utility model embodiment provides processes system, introduce the processing mode of independent double; two AD conversion, data conversion and temperature transition are separated, independent converter is used to change respectively, view data and temperature data are separated, ensureing not temperature influence during image real time transfer, processing accuracy is higher. Independent double; two A/D convertor circuit makes image capture controller can obtain temperature information accurately in real time, thus it is more accurate to ensure that the temperature to Infrared Detectors controls, reduces Infrared Detectors and gathers the distortion of data. Meanwhile, the infrared image acquisition that this utility model embodiment provides processes system and adopts FPGA process, while assurance function and performance, eliminates this high price device of DSP, saves overall cost; Processing speed can be improved simultaneously.
Preferably, shown in Figure 2, bias voltage output circuit 40 is also connected with TEC controller 50, provides bias voltage (FB+ in Fig. 2) for this TEC controller 50; TEC controller 50 is additionally operable to gather the current environmental temperature (FB-in Fig. 2) of Infrared Detectors 10, and according to current environmental temperature (for gathering the analog temperature data of Infrared Detectors 10 in Fig. 2, the digital temperature data of Infrared Detectors 10 can also be gathered, namely the outfan of AD temperature divertor 20 is also connected with TEC controller 50, and digital temperature data are sent to TEC controller 50 by AD temperature divertor 20) adjust the temperature of Infrared Detectors 10.
Concrete, that image capture controller 60 sends according to AD temperature divertor 20 digital temperature data, adjust the output control signal to bias voltage output circuit 40 in real time, and then control bias voltage output circuit 40 are supplied to the magnitude of voltage of TEC controller 50. By adjusting the bias voltage of TEC controller 50, thus adjusting the heat energy of TEC controller 50 output, the temperature of Infrared Detectors 10 namely can be regulated.
Preferably, shown in Figure 3, FPGA also includes image processing module. The data image signal collected is sent to image processing module by image capture controller 60, image processing module is used for this data image signal is processed, including: one or more data image signal being carried out in nonuniformity correction, medium filtering, temperature identification, image enhaucament, cursor superposition process.
Wherein, for view data, first image processing module carries out nonuniformity correction and medium filtering, removes the heterogeneity and noise jamming that introduce when gathering. Then analyze view data, identify the temperature conditions that image reflects, and at relevant position superposition cursor, clear and definite indicates temperature conditions, image is carried out enhancement process, produces striking contrast more simultaneously. Finally, shown in Fig. 3, Fig. 4, FPGA is provided with LCD interface, and the picture signal after process is sent to outside LCD display by FPGA by LCD interface, and then complete for image is clearly indicated out by control LCD, it is simple to intuitively check.
Preferably, shown in Figure 4, FPGA also includes: buffer, depositor (Register_Ctrl), reset circuit (Reset_Ctrl), AMBA, and FPGA external harmoniousness flash memory (FLASH).
The structure of this image capturing system is discussed in detail below by an embodiment.
Embodiment one
In embodiment one, shown in Figure 5, Infrared Detectors uses UL03262, AD temperature divertor and AD data converter all to adopt ADS850, TEC temperature controller to use MAX1978, and bias voltage output circuit 40 adopts D/A converter, is specially AD5324; Flash memory FLASH uses M25P64, buffer memory SDRAM to use K4S641632N, and LCD display uses AT070TN83, FPGA to use the CycloneVSoC5CSEMA5F31C6 of Altera. Embodiment one is only a kind of specific embodiment, but is not limited to this, can select other model devices as required.
FPGA produces bias voltage by D/A converter and is applied on Infrared Detectors, then controls Infrared Detectors and infrared signal converts to analog electrical signal, and FPGA keeps the operating temperature of Infrared Detectors also by control TEC temperature controller simultaneously. Two-way converter converts the analog electrical signal that Infrared Detectors exports to digital electric signal, including temperature information and image information, then feeds back to FPGA. FPGA carries out the infrared image processing of correspondence according to the temperature information obtained and image information, is then presented on LCD by infrared image. FLASH and SDRAM is for preserving the FPGA information required when carrying out infrared image processing.
A kind of infrared image acquisition that this utility model embodiment provides processes system, introduce the processing mode of independent double; two AD conversion, data conversion and temperature transition are separated, independent converter is used to change respectively, view data and temperature data are separated, ensureing not temperature influence during image real time transfer, processing accuracy is higher. Independent double; two A/D convertor circuit makes image capture controller can obtain temperature information accurately in real time, thus it is more accurate to ensure that the temperature to Infrared Detectors controls, reduces Infrared Detectors and gathers the distortion of data. Meanwhile, the infrared image acquisition that this utility model embodiment provides processes system and adopts FPGA process, while assurance function and performance, eliminates this high price device of DSP, saves overall cost; Processing speed can be improved simultaneously.
This utility model can have multiple multi-form detailed description of the invention; above for Fig. 1-Fig. 5 in conjunction with accompanying drawing to the technical solution of the utility model explanation for example; this is not meant to the instantiation that this utility model applies and can only be confined in specific flow process or example structure; those of ordinary skill in the art it is understood that; specific embodiments presented above is some examples in multiple its preferred usage, and the embodiment of any embodiment this utility model claim all should within technical solutions of the utility model scope required for protection.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, it is not limited to this utility model, although this utility model being described in detail with reference to previous embodiment, for a person skilled in the art, technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature carries out equivalent replacement. All within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (8)
1. an infrared image acquisition processes system, it is characterised in that including: Infrared Detectors, AD temperature divertor, AD data converter, bias voltage output circuit, TEC controller and FPGA, described FPGA is internally integrated image capture controller;
Described Infrared Detectors is connected with described image capture controller respectively through described AD temperature divertor, described AD data converter; Described AD temperature divertor for being converted to digital temperature data by the analog temperature data of described Infrared Detectors, and sends described digital temperature data to described image capture controller; Described AD data converter for being converted to data image signal by the analog picture signal that described Infrared Detectors gathers, and sends described data image signal to described image capture controller;
Described image capture controller is connected with described Infrared Detectors respectively through described bias voltage output circuit, described TEC controller; Described bias voltage output circuit is for providing bias voltage for described Infrared Detectors; Described TEC controller is for adjusting the temperature of described Infrared Detectors.
2. infrared image acquisition according to claim 1 processes system, it is characterised in that described bias voltage output circuit is also connected with described TEC controller; Described TEC controller is additionally operable to gather the current environmental temperature of described Infrared Detectors, and adjusts the temperature of described Infrared Detectors according to described current environmental temperature.
3. infrared image acquisition according to claim 2 processes system, it is characterised in that
The described digital temperature data that described image capture controller sends according to described AD temperature divertor, adjust the output control signal to described bias voltage output circuit in real time, control described bias voltage output circuit and be supplied to the magnitude of voltage of described TEC controller.
4. infrared image acquisition according to claim 1 processes system, it is characterised in that described FPGA also includes image processing module;
The described data image signal collected is sent to described image processing module by described image capture controller, and described image processing module is for processing described data image signal.
5. infrared image acquisition according to claim 4 processes system, it is characterised in that described FPGA is provided with LCD interface, and the picture signal after process is sent to outside LCD display by described FPGA by described LCD interface.
6. infrared image acquisition according to claim 4 processes system, it is characterized in that, described image processing module specifically for: described data image signal is carried out in nonuniformity correction, medium filtering, temperature identification, image enhaucament, cursor superposition one or more process.
7. process system according to the arbitrary described infrared image acquisition of claim 1-6, it is characterised in that described FPGA also includes: buffer, depositor, reset circuit, and described FPGA external harmoniousness flash memory.
8. process system according to the arbitrary described infrared image acquisition of claim 1-6, it is characterised in that described AD temperature divertor and AD data converter are ADS850, and described bias voltage output circuit is D/A converter AD5324.
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| CN113253777A (en) * | 2021-04-16 | 2021-08-13 | 北京空间机电研究所 | Coarse-fine composite temperature measurement and control system of infrared detector |
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| CN113253777A (en) * | 2021-04-16 | 2021-08-13 | 北京空间机电研究所 | Coarse-fine composite temperature measurement and control system of infrared detector |
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