Non-refrigeration infrared focal plane array driving control circuit integration design method

A technology for driving control circuits and infrared focal planes, applied to electric radiation detectors, etc., can solve the problems that infrared temperature control circuits do not have repeatable programmability and poor system design flexibility

Inactive Publication Date: 2015-01-28
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The present invention provides an uncooled infrared focal plane array drive, acquisition and temperature control circuit for the defects that the

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  • Non-refrigeration infrared focal plane array driving control circuit integration design method
  • Non-refrigeration infrared focal plane array driving control circuit integration design method
  • Non-refrigeration infrared focal plane array driving control circuit integration design method

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Embodiment Construction

[0009] The implementation method of the present invention will be described below in conjunction with the accompanying drawings and specific examples.

[0010] figure 2 It is a block diagram of the overall structure of the infrared focal plane array front-end control circuit. The circuit is composed of a crystal oscillator circuit, an infrared optical part, an infrared focal plane array detector, a temperature control sequential circuit, an A / D acquisition control sequential circuit, and an FPGA logic control unit circuit. The crystal oscillator circuit uses a 27MHz passive crystal oscillator with two external start-up capacitors to provide input clocks for programmable devices; the detector uses an uncooled microbolometer focal plane array; the A / D acquisition circuit uses its own correlated double sampling The 16-bit integrated chip VSP2566 working with a single power supply; the temperature control circuit chip adopts the thermoelectric refrigeration controller MAX1978 pr...

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Abstract

The invention relates to a non-refrigeration infrared focal plane array driving control circuit integration design method which aims at overcoming the shortcomings that the existing non-refrigeration infrared focal plane array driving collection and temperature control circuit is complex in design, low in integration level and poor in flexibility. A field programmable gate array (FPGA) is utilized to achieve the non-refrigeration infrared focal plane array driving collection and temperature control circuit. The temperature control circuit enables all detection elements of the infrared focal plane array to be stabilized at reference temperature in the whole working process to improve the detection sensitivity of the infrared focal plane array. The FPGA logic control circuit is the core circuit for achieving driving, collection and temperature control of output signals of the whole infrared focal plane array, provides driving time sequence, collection time sequence and detector temperature control logic configuration time sequence of output signals of an infrared focal plane array detector to further process the follow-up infrared signals. The method has application and popularization value.

Description

technical field [0001] The invention relates to the technical field of thermal imaging of an uncooled infrared focal plane array, and specifically belongs to the design of an infrared focal plane array drive sequence, acquisition sequence and temperature control sequence circuit. Background technique [0002] With the development of infrared detection technology, there are requirements for the accuracy of infrared temperature measurement and the quality of infrared imaging. Since the temperature measurement process of the infrared thermal imaging system will be affected by environmental factors, it is necessary to design a flexible and programmable temperature control circuit to stabilize the infrared detector at a stable temperature value, so as to improve the detection efficiency of the detector. Temperature resolution and detection sensitivity; limited by the readout circuit of the infrared focal plane detector, it is difficult to directly read out high-precision digital ...

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Application Information

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IPC IPC(8): G01J5/24
Inventor 代少升唐华明陈桂芳刘琴申娇王飞徐洪
Owner CHONGQING UNIV OF POSTS & TELECOMM
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