Adaptive filtering algorithm and system for active optical system micro-displacement sensor

Abstract

The invention relates to an adaptive filtering algorithm and system for a micro-displacement sensor of an active optical system. The system comprises a signal generating module, a filtering module, adata receiving module, a control module, a data storage module and an output module. The signal generating module is used for generating a pure noise signal and a to-be-processed signal; the data receiving module is configured to output the originally collected analog signal as a serial output according to an SPI protocol after being converted via an A / D converter and input the signal to the filtering module with 16-bit data via a digital signal acquisition module; the filtering module is used for filtering the to-be-processed signal containing the noise signal according to the adaptive filtering algorithm; the data storage module is used for storing the unprocessed signal and the processed signal and performing timely extraction when processing the signal; and the control module is used for synchronous data transmission between the modules. The adaptive filtering algorithm and system for the micro-displacement sensor of the active optical system in the invention can effectively acquire the pure noise signal to finish digital filtering and filter out the environment noise and the noise generated in the signal transmission process.

Description

technical field [0001] The invention relates to data filtering technology, in particular to an adaptive filtering algorithm and system for micro-displacement sensors of active optical systems. Background technique [0002] With the development of new technologies for large-aperture and ultra-large-aperture astronomical telescopes, the importance of active optical technology has become more and more obvious. "Active" optics is relative to the traditional "passive" support. The latter aims at factors that may affect the image quality of the telescope. An "optimal" support method is formulated in advance and will not change during the operation of the telescope. The "active" correction is aimed at maintaining, that is, real-time detection of wavefront errors during the operation of the telescope, real-time adjustment of the support structure, and real-time correction of wavefront errors. [0003] Active optical technology includes splicing mirror and thin mirror technology, an...

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Problems solved by technology

[0004] At present, most of the micro-displacement sensors used in the above-mentioned active optical systems are eddy current type, which are not very ideal in terms of stability and weight. Therefore, it is necessary to develop a new type of micro-displacement sensor to meet the needs of active optical technology. top priority

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