Shutter integrated device, control system and time sequence control method

Abstract

The invention discloses a shutter integrated device, a control system and a time sequence control method. The shutter integrated device comprises an integrated device bottom plate, a first CCD camera, a second CCD camera, a first shutter switch, a second shutter switch and a light splitting device. The first CCD camera, the second CCD camera and the light splitting device are all installed on the integrated device bottom plate. The first shutter switch is arranged on the first CCD camera, and the second shutter switch is arranged on the second CCD camera; and the first shutter switch and the second shutter switch are respectively connected with the control system. According to the invention, the debugging difficulty caused by the position and state difference of the camera is avoided, the efficiency is improved, the system error is eliminated, the MHz exposure is realized, the exposure images do not interfere with each other and influence each other, and the overall precision and stability of the system are improved.

Description

technical field [0001] The invention relates to the field of laser speed measurement, and more specifically, to a shutter integrated device, a control system and a timing control method. Background technique [0002] Particle Image Velocimetry (PIV) technology in the field of traditional laser velocimetry technology generally can only obtain particle velocity values, and it is difficult to obtain high-precision particle acceleration values. The four-pulse laser can emit four pulsed laser beams sequentially, and then use two double-exposure charge-coupled device (CCD) cameras to capture the tracer particle images illuminated by the four pulsed laser beams respectively. The frame tracer particle image calculates the velocity of the tracer particle, and further calculates the acceleration. [0003] However, because the time interval between the four pulsed laser beams is very short, and the second exposure time of the traditional double-exposure CCD camera is relatively long, ...

AI Technical Summary

Problems solved by technology

[0003] However, because the time interval between the four pulsed laser beams is very short, and the second exposure time of the traditional double-exposure CCD camera is relatively long, the CCD camera will lose The tracer particle images irradiated by the third pulse and the fourth pulse laser beam are taken at the same time, resulting in inaccurate cross-frame particle pairs, which affects the accuracy and / or precision of the particle velocity calculated based on the cross-frame particle pairs

And since at least two double-exposure CCD cameras are required to work synchronously, if the positions of the optical centers of the two CCD cameras are not set properly, it will directly cause displacement errors between the tracer particle image pairs, which will affect the calculation results

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