Three-coordinate supporting and adjusting mechanism for suspended PIV calibration

Abstract

The invention relates to a three-coordinate supporting and adjusting mechanism for suspended PIV calibration, and belongs to the technical field of particle imaging speed measurement. The mechanism comprises a three-coordinate support adjusting module, a clamp module and a PIV calibration plate. A clamp module is arranged below the three-coordinate supporting and adjusting module. The clamp module clamps a PIV calibration plate. The three-coordinate supporting and adjusting module comprises a guide rail, a sliding block, a three-shear-fork telescopic frame, a manual rocking wheel ball screw linear guide rail sliding table, a control rope and a pulley block. The guide rail and the sliding block are combined to achieve front-back movement of the device, and the manual rocking wheel ball screw linear guide rail sliding table achieves left-right position adjustment of the device. The three-shear-fork telescopic frame is controlled to stretch out and draw back through the winding and unwinding of the pulley block and the control rope, so that the PIV calibration plate is controlled to move up and down, and the clamp module fixes the PIV calibration plate on a clamp through two screws on an I-shaped steel clip. Movement can be adjusted in the three-coordinate direction, and the whole device is simple in structure, high in precision and easy to operate.

Description

technical field [0001] The invention relates to a three-coordinate support adjustment mechanism for suspended PIV calibration, and belongs to the technical field of particle imaging velocity measurement. Background technique [0002] Particle image velocimetry (PIV) is a non-contact hydrodynamic velocimetry method developed in the late 1970s. It is a new flow measurement technology developed by using image processing technology. resolution, and the overall structure and transient images of the flow display can be obtained. Based on the basic principle of PIV technology, in essence, PIV measures the velocity of particles in the flow field, and uses tracer particles scattered in the fluid to represent the velocity of the flow field where the particles are located. Therefore, the calibration of the PIV reference plane requires very high accuracy, but currently there is no structure that is easy to adjust and convenient for calibrating the PIV calibration plate in space. For th...

AI Technical Summary

Problems solved by technology

Therefore, the calibration of the PIV reference plane requires very high accuracy, but currently there is no structure that is easy to adjust and convenient for calibrating the PIV calibration plate in space. For the suspended PIV measurement technology, calibration and correction are required before measurement. The calibration plate used in the laboratory is a relatively large metal plate, and the device used to fix the calibration plate is not easy to control, has low precision, and is inconvenient to operate.

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