消声室传声路径校准中传声路径位置偏差的影响因素研究  

Study on Influencing Factors of Location Deviation of SoundTransmission Path in Anechoic Chamber Calibration

作　　者：阮张锋[1] 顾诚诚 陈海咏[1] 丁继杰 孟紫薇 RUAN Zhangfeng;GU Chengcheng;CHEN Haiyong;DING Jijie;MENG Ziwei(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 200233,China;School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]上海市质量监督检验技术研究院,上海200233 [2]华东理工大学机械与动力工程学院,上海200237

出　　处：《计量学报》2024年第4期573-579,共7页Acta Metrologica Sinica

基　　金：上海市质量监督检验技术研究院科研项目(KY-2020-32-JL)。

摘　　要：消声室声学测量作为衡量产品声学特性的重要手段,其性能直接影响相关声学试验准确度。测量过程的准确性不仅受理论计算限制,还受实际测量过程影响。由于传声装置和钢丝绳的自重,传声路径从理想直线变形为曲线,进而影响声学性能测量的精确性。因此,对于消声室传声路径的校准工作尤为重要。利用有限元仿真重点研究绳长、松紧度和倾角对传声路径的影响,通过相应实验验证仿真模型的准确性,并通过横向对比参数,研究不同参数对于传声路径的具体影响。针对参数对传声路径偏差的研究,从多角度为传声路径误差校准提供了思路,有助于提高消声室测量装置的精度,在一定程度上促进消声室高精度全自动校准系统的发展。Anechoic chamber acoustic measurement is an important means to measure the acoustic characteristics of products,and its performance directly affects the accuracy of relevant acoustic tests.The accuracy of measurement process is not only limited by theoretical calculation,but also affected by practical measurement process.Due to the dead weight of the sound transmitting device and the wire rope,the sound transmitting path is deformed from an ideal straight line to a curve,which affects the accuracy of the acoustic performance measurement.Therefore,it is particularly important to calibrate the sound transmission path of anechoic chamber.Finite element simulation focuses on the influence of rope length,tightness and inclination on the sound transmission path,verifies the accuracy of the simulation model through corresponding experiments,and studies the specific influence of different parameters on the sound transmission path through lateral comparison of parameters.Aiming at the study of parameters on the deviation of sound transmission path,a way for the calibration of sound transmission path error from multiple perspectives is provided,which is helpful to improve the accuracy of anechoic chamber measurement device and promote the development of high-precision automatic calibration system of anechoic chamber to a certain extent.

关 键 词：声学测量 消声室 有限元仿真 传声路径 误差校准 

分 类 号：TB95[一般工业技术—计量学]