Multispectral multi-focal-plane splicing infrared detector control and signal sampling circuit

Abstract

The invention provides a multispectral multi-focal-plane splicing infrared detector control and signal sampling circuit which comprises a time reference control module, a detector sequential control module, an analog-digital converter sequential control module, an infrared detector control module, an analog-digital converter data sampling module and an analog signal delay compensation module. According to the multispectral multi-focal-plane splicing infrared detector control and signal sampling circuit, a uniform control timing sequence is provided for controlling of multiple infrared detectors through interior timing sequence control logic, the infrared detectors can be controlled independently, and the fact that multiple infrared detectors can output data simultaneously is achieved. In a large field angle infrared remote sensing camera, imaging precision can be improved, image geometric distortion is reduced, design difficulty of a rear-end digital signal processing circuit is simplified, and application of the multispectral multi-focal-plane splicing infrared detector control and signal sampling circuit in the infrared remote sensing camera is achieved.

Description

technical field [0001] The invention relates to a multi-spectral segment and multi-focal plane splicing infrared detector control and signal sampling circuit, which is used in infrared video circuit systems such as infrared remote sensing cameras to control the infrared detector and the sampling signal circuit. Background technique [0002] With the development of infrared detector manufacturing technology, infrared imaging system has been widely used in national defense, remote sensing, medical and other fields. [0003] At present, the infrared detector used in the infrared video system is basically an infrared detector. In order to improve the resolution of the infrared imaging system, the process of splicing multiple infrared detectors can be used to double the resolution of the infrared imaging system. But it also introduces many new technical problems. Designing multiple infrared detector imaging systems using existing technologies has several drawbacks: [0004] 1) ...

AI Technical Summary

Problems solved by technology

[0004] 1) When multiple infrared detectors are used, multiple infrared detectors cannot be controlled cooperatively

When the infrared remote sensing satellite has a large field of view, if the integration time of the infrared detectors at different positions cannot be controlled independently, it may cause image distortion and reduce the imaging quality

[0005] 2) If multiple infrared detectors cannot output images at the same time, first of all, the imaging time of each infrared detector is different, and in the imaging system of multiple infrared detector splicing process, the imaging quality will be reduced

Secondly, the output time of the analog signal of the infrared detector is different, which will increase the difficulty of designing the back-end digital signal processing circuit

[0006] 3) When controlling the infrared detector and sampling the analog signal, the delay of the analog signal must be considered. Most of the existing technologies have a fixed delay time, and there is no command control method, which will increase the design and debugging of the infrared video imaging system. Difficulty, system flexibility is not high

[0007] 4) The existing technology is not conducive to the use of pipeline design and data clock synchronization design methods in the design and implementation of digital circuits, and the system clock frequency is not easy to increase, so the data processing speed and response speed of the system are difficult to improve

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