摘要
风洞气动噪声试验领域对应用柔性探针传声器进行高精度声学测量存在迫切需求,针对风洞噪声试验中的柔性探针传声器校准修正问题,提出一种基于机体模型表面声场标定及传递函数修正的柔性探针传声器校准方法。分别介绍了基于比较法的模型表面声场标定技术及基于传递函数修正的柔性探针传声器校准方法,在此基础上通过已知声学特性的标准传声器对机体模型表面声场进行标定,并校准了柔性探针传声器传递函数修正量,根据校准结果进行了盲信号测试验证试验,试验结果表明经过传递函数校准修正后,柔性探针传声器在0~20 kHz频段范围内对盲信号测试误差从12 dB减小到0.18 dB,验证了基于传递函数修正的柔性探针传声器校准方法的有效性及准确性,校准结果满足风洞气动噪声试验中通过柔性探针传声器进行声学测量的精度要求。
In the field of wind tunnel aerodynamic noise testing,there is an urgent need to apply flexible probe microphones for high-precision acoustic measurements.This paper proposes a calibration method for flexible probe microphones based on the calibration of the surface sound field and transfer function correction of the body model in wind tunnel noise testing.The principle of model surface sound field calibration based on comparison method and the calibration method of flexible probe microphone based on transfer function correction were introduced respectively.On this basis,the surface sound field of the body model was calibrated using a standard microphone with known acoustic characteristics,and the transfer function correction of the flexible probe microphone was calibrated.Blind signal validation tests were conducted based on the calibration results,and the experimental results showed that after the transfer function calibration correction,The blind signal testing error of the flexible probe microphone has been reduced from 12 dB to 0.18 dB in the frequency range of 0~20 kHz,verifying the effectiveness and accuracy of the calibration method based on transfer function correction for flexible probe microphones.It can meet the accuracy requirements for acoustic measurements using flexible probe microphones in wind tunnel aerodynamic noise tests.
作者
韩松辰
李元首
陈佳伟
杜延丽
邵铮
HAN Songchen;LI Yuanshou;CHEN Jiawei;DU Yanli;SHAO Zheng(Aerodynamics Research Institute,Harbin 150001,China;Laboratory of Low Speed and High Reynolds Number Aviation Science and Technology,Harbin 150001,China;Heilongjiang Provincial Laboratory of Aerodynamic Noise and Control,Harbin 150001,China)
出处
《计量科学与技术》
2026年第1期26-35,共10页
Metrology Science and Technology
基金
国家重点研发计划(2018YFE0184000)。
关键词
计量学
气动噪声
风洞试验
柔性探针传声器
传递函数校准
比较法校准
metrology
aerodynamic noise
wind tunnel testing
flexible probe microphone
frequency response calibration
comparison calibration
