Infrared analog detector and design method thereof

Abstract

The invention discloses an infrared analog detector and a method thereof. The infrared analog detector comprises a hardware framework and a software control part. A central processing unit comprises a DSP(digital signal processor) and an FPGA (field programmable gate array); a data storage module comprises an SRAM (static random access memory); a program executing module comprises an SDRAM (synchronous dynamic random access memory) and an FLASH chip; an external drive signal receiving module comprises an external total interface and an A / D chip, and further comprises an interface for connecting the drive circuit of an infrared imaging electronic component, as well as an offset over-voltage monitoring module and an electrifying sequential detection module; an analog signal output module comprises a D / A chip for converting digital signals output by the central processing unit into analog signals and an amplification circuit for signal amplification; and the software control part is a software console for a host computer and is used for sending the instruction of the host computer directly to the central processing unit through a serial port command, so as to correct various model parameters and functional parameters of the analog detector. The invention has the advantage that the format of an output image as well as the proportion of various image characteristics in the analog detector can be selected freely.

Description

technical field [0001] The invention belongs to the technical field of infrared thermal imaging, in particular to an infrared analog detector and a design method thereof. Background technique [0002] The staring cooling infrared focal plane detector is a kind of infrared detector which is widely and rapidly used and developed at present. It has the advantages of high sensitivity and small temperature difference, and is an extremely important infrared detection device for both military and civilian purposes. At present, the most mainstream staring cooling detector material is HgCdTe material, which has the highest detection rate according to the current use situation, but it also has its own manufacturing technical difficulties. The biggest problem is that in the growth process of the focal plane film, it is difficult to control the composition of the elements in the HgCdTe material. At the same time, the choice of the growth method of the film also determines the existence...

AI Technical Summary

Problems solved by technology

At present, the most mainstream staring type cooling detector material is HgCdTe material. Judging from the current usage, this material has the highest detection rate, but it also has its own manufacturing technical difficulties.

The biggest problem is that in the growth process of the focal plane film, it is difficult to control the composition of the elements in the HgCdTe material. At the same time, the choice of the growth method of the film also determines the existence of dislocations, surface crossings, and twinning in the lattice of the HgCdTe material. At present, molecular epitaxy (MBE), the most widely used growth method, has been able to control the above problems well, but this growth method needs to be carried out under high temperature and long-term human monitoring, and the growth efficiency is not high. Low yield

At present, my country has produced the first batch of staring medium-wave cooling infrared detectors, but the yield is low and the quantity is very small; at the same time, the working life of the domestic detector refrigerator is short, which is not conducive to the long-term work of the detector. There will be obvious aging and performance degradation in the process

Images