Design And Research On High-speed Channel Of Real-time Infrared Image Based On SoC

With the incessant improvement of the trait and application of the sensor, it requires a performance matching for the high-speed channel of infrared image, which is the process unit of the thermal image instrument. The fast development of information technology provides an extensive prospect for the high-speed channel. SoC(System on Chip) emphasizes the co-operation between hardware and software , exerts the advantage between the real-time processing of hardware and the flexibility of software. It improves the performance of system.We design three modules that the state machine of synchronous interface, data processing logic and the pseudo color display for the input , processing and output of high-speed channel of infrared image. The project embeds the traditional hard joint logic of user in SoC system and implements the acquisition, processing and display of infrared image based on Altera SOPC. Then the module of high-speed channel of infrared image is present and is make to a new stature.The synchronous interface, as the front-end of high-speed channel of infrared image, receives the output signal of sensor and achieves the transfer and decode of input from sensor. There are two method implement the synchronous acquisition of video, one is synchronous A/D acquisition, it is entirely controled by user logic and have the trait of flexible design. The other takes the video codec as a transition and obtains synchronous data using state machine, this way has the trait of compatibility. Codec makes logic function and configuration parameters separate and HDL ( Hardware Description Language)designing code maintenance easier through I2C bus and configuration files. The synchronous state machine's four kernel processes that horizontal blanking, vertical blanking, horizontal counter and vertical counter are the foundation of high-speed channel.The date processing logic receives transformed data from the state machine of synchronous interface, then buffers, transmits and processes the date for improving the SNR and the quality of image. It includes three main modules that data buffer, bus bind and characteristic data processing. The data buffer adopts dual RAM and frame buffer FIFO. The dual RAM is an effective and mature framework between acquisition interface and the shared data of CPU, it fuses the user logic and dual logic more flexible bus protocol interface than traditional dual RAM. We present frame buffer and line buffer for difference system using the on-chip RAM of FPGA(Field Programmable Gate Array) and introduces the bind logic of PLD(Programmable Logic Device) for various CPU bus. We supply the need for the various system framework by updating the logic programme. The hard joint logic of cross-line contact thermometer, as the fundamental functions of measure, is the base of infrared test.The thermal imagery display is the final output of SoC high-speed channel of infrared image, it provides the characteristic data of measured object, displays the visual temperature distribution to user, recognizes the object entirely, and makes easy to on-site diagnosis. Image enhancement with pseudo color implements the visualization of measured data and display of real-time image. The project is divided into two hierarchy. bottom layer is composed of"vertical association of data bit"and"RAM color palette", it achieves the basic mapping from data to color ; top layer is composed of display module based on Altera Nios microcontroller and the on-chip bus of Avalon. The encapsulation of user logical module incarnates the reuse principle of IP core (Intellectual Property Core) and protects the investment.We present the module of infrared high-speed channel by means of UML(Unified Modeling Language) and the modeling theory of Petri, then we set up the other module which is composed of the state graph of dual FIFO buffer and Petri based on HDL by this module.The study summarized mainstream design patterns of the current, and presented a number of model performance results the author had researched. Its main innovation is that using SoC Technical to design high-speed infrared image channel, guaranteeing the real-time of signal acquisition, data processing and information display, taking full advantage of the programmable resources of PLD on chip to establish the high-speed infrared image channel storage architecture of a logic dual-port RAM and more flexible row FIFO buffer mechanism, using Customized Orders and Avalon Module of embedded processors as the effective means of dealing with the key algorithms to realize real-time infrared image pseudo-color display and referencing the rich semantic model of UML and Petri Net to have proposed high-speed infrared image channel model statute and have guaranteed the higher accuracy of the abstract description.At last,the text listed three types of the performance results of high-speed infrared channel according to the author's research topics And revealed their characteristics. Firstly, SoC Technology uses HDL Description of logic function and Synergy - chip processor hardware and software development model to realize the real-time processing of data, secondly, PLD Interface through its powerful hardware function as interface or a bridge expansion CPU I/O and complete the data acquisition and display, thirdly, the integrated electron on the basis of the original system integrates the scattered electronic hardware function to achieve the Integration and Miniaturization of the System. Looking to the future, mastering SoC designing concept, using the executable model description Design Methodology and putting the advanced technology of ADL( Architecture Description Language,System Architecture Description Language)and ASIP(Application Specific Instruction Processor,Special Instruction Set Processor)into the System Implementation ,all that can make a qualitative leap of Infrared high-speed channel in performance!...