Signal processing system for calculating real-time atmospheric turbulence parameters

A technology of atmospheric turbulence and signal processing, which is applied in aerodynamic tests, machine/structural component testing, measuring devices, etc., and can solve problems such as limited computing power, long refresh intervals of atmospheric turbulence parameters, and high hardware costs

Active Publication Date: 2012-02-15
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both have the following disadvantages: using more chips, the hardware cost is high, and the integration level is not high; the computing power is limited, resulting in a long refresh time interval of atmospheric turbulence parameters

Method used

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  • Signal processing system for calculating real-time atmospheric turbulence parameters
  • Signal processing system for calculating real-time atmospheric turbulence parameters
  • Signal processing system for calculating real-time atmospheric turbulence parameters

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Experimental program
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Embodiment Construction

[0035] Combine below Figure 1 to Figure 4 This embodiment will be specifically described.

[0036] like figure 1Shown, the real-time computing system of the atmospheric turbulence parameter that is used for adaptive optics system of the present invention: comprises interface circuit (1), main processor (2), coprocessor (3), memory control circuit (4), memory Circuit (5, 6). Hartmann wavefront detection residual slope data and deformable mirror driving voltage data obtained during the closed-loop operation of the adaptive optics system are input to the data input end of the interface circuit (1), and the data output end of the interface circuit (1) is connected to the coprocessor (3) the first data input terminal 1., the second data input and output terminal 2. of the coprocessor (3) is connected to the first data input and output terminal 1. of the memory control circuit (4), and the second data input and output terminal of the memory control circuit (4) The data input and...

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Abstract

The invention provides a signal processing system for calculating real-time atmospheric turbulence parameters. A general programmable processor is used as a main processor (2) for calculation, and a coprocessor (3) which is provided with a hardware processing array is used for rapidly calculating a dense part, so that the real-time performance of the computation is guaranteed through the parallelcomputation of multiple processing units. Data of the main processor (2) and data of the coprocessor (3) are exchanged by a way that shared memory circuits (5, 6) are processed by ping-pang reading and writing through a memory control circuit (4). The processing system has a higher computation throughput capability and can be used for realizing the online calculation of the atmospheric turbulenceparameters in a working process of a self-adapted optical system; the real-time performance of the processing system is very good and the calculation efficiency of the atmospheric turbulence parameters is greatly improved; and the integration level and commonality of the signal processing system are very high so that the miniaturization and compatibility of devices are promoted and the hardware cost is saved.

Description

technical field [0001] The invention relates to a high-speed digital signal processing system, which is particularly suitable for real-time on-line calculation of atmospheric turbulence parameters in an adaptive optical system. Background technique [0002] Adaptive optics (AO) technology is widely used in the field of astronomical observation by measuring and correcting the wavefront distortion caused by atmospheric turbulence in real time, so that large optical telescopes can obtain target images close to the diffraction limit. Atmospheric turbulent coherence length r 0 (Fried constant), disturbance variance Atmospheric turbulent coherence time τ 0 , outer scale L of atmospheric turbulence 0 , The wind speed V objectively reflects the current intensity of atmospheric turbulence from time and space. Due to the rapid change of atmospheric conditions, even for the same observation point, the atmospheric turbulence parameters will fluctuate greatly with time. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/08
Inventor 郑文佳李梅母杰
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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