Rapid fluorescence lifetime imaging system and method for flow field diagnosis

Abstract

The invention provides a rapid fluorescence lifetime imaging system and method for flow field diagnosis, and solves the problems of low imaging time resolution and low frame rate of the existing fluorescence lifetime imaging technology. The system comprises a pulse laser, a sheet light shaping device, a flow field generating device, a filter, a framing camera and a data processing device, the pulse laser emits laser pulses and electric signals at the same time, and the sheet light shaping device is used for shaping the laser pulses into sheet light. The flow field generating device is used forproviding a to-be-detected target flow field, and the to-be-detected target flow field emits a fluorescence signal after being irradiated by sheet light; the filter is used for transmitting the fluorescence signal and filtering a spurious signal; the framing camera comprises a synchronous control device and four gating cameras, and the synchronous control device controls exposure time gates and delays of the four gating cameras; the electric signals trigger the framing camera to expose to obtain a four-framing image; and the data processing device is used for receiving the four-framing imagecaptured by the framing camera and processing the four-framing image to obtain a fluorescence lifetime image and displaying the fluorescence lifetime image.

Description

technical field [0001] The invention relates to flow field diagnosis technology, in particular to a fast fluorescence lifetime imaging system and method for flow field diagnosis. Background technique [0002] The flow field includes air flow, combustion, plasma and multiphase flow field. The experimental research on the flow field diagnostic technology can provide data support for the establishment and verification of the flow field model, thereby providing a theoretical basis for the application of related projects, such as engine performance promote. Traditional flow field diagnosis techniques are mostly intrusive, which will disturb the flow field, resulting in errors in the measurement of flow field parameters. [0003] At present, the most advanced flow field diagnostic technology is optical diagnostic technology, which can realize non-invasive measurement of flow field; among them, planar laser-induced fluorescence lifetime imaging (PLIF) technology is widely used, wh...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems that the existing fluorescence imaging technology is slow, the measurement accuracy of fluorescence lifetime is low, and it cannot meet the requirements of high time resolution and high imaging frame rate of complex flow field, the present invention provides a flow field diagnosis Rapid fluorescence lifetime imaging system and method

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