Velocity field measuring device and measurement model of vehicle air flow

摘要

The present invention relates to a velocity field measuring device and a measurement model of a vehicle indoor air flow, comprising: a laser oscillator for generating and providing a laser wave having a predetermined frequency; A chopping step for intermitting the output of the laser wave provided from the laser oscillator according to a trigger pulse input from the outside; A fiber optic lens for refracting the laser wave output from the chopper at a predetermined angle and condensing the laser wave toward a predetermined point; a lens head for irradiating an experimental model with the laser wave focused by the fiber optic lens; A CCD camera which detects a scene represented by the irradiation of the laser wave as an experimental model as a video signal; A synchronizing circuit for detecting a vertical synchronizing signal from the CCD camera to generate a trigger pulse in synchronization with the synchronizing signal and providing the generated trigger pulse to the chopper; An image processing device for outputting the video signal detected by the CCD camera to be displayed externally, and converting the digital signal into a digital signal and outputting the digital signal; An instantaneous velocity field relating to the airflow within the vehicle cross section, comprising a personal computer connected to the image processing apparatus and receiving the digitally converted video signal and analyzing a screen composed of the digital video signal according to a predetermined program Can be calculated and measures can be taken to eliminate abnormal indoor airflow.