激光雨滴谱仪测试方法研究OA

Based on the laser raindrop spectrometer tests,a new method for testing the raindrop diameter and velocity errors and evaluating the accuracy of precipitation phenomenon recognition is proposed,and a raindrop simulation device that can simulate raindrops of different diameters and adjust the falling height is designed.Splash pattern was used to check the uniformity of the simulated raindrops and the results showed less than 5%error for the same type of raindrops.The relative errors in diameter and velocity measured by the raindrop spectrometer were 7.4%and 6.6%.A precipitation phenomenon simulation laboratory was established to simulate drizzle,rain,snow,and rain mixed with snow,and to achieve simulation of different rainfall intensities.Simulating different rainfall intensities,the measured values of the raindrop spectrometer were less than those obtained by manual measurement,with maximum deviations of 17.8%for rainfall and 14.3%for rainfall intensity.The calibration function was obtained based on the manual measurements,and the maximum deviation decreased to 8.5%after calibration.In addition,when simulating precipitation with different diameters,the raindrop spectrometer could draw the corresponding raindrop spectrum.