应用LabVIEW开发的车载音响性能检测系统  

Development of Automobile Audio Performance Test System Based on LabVIEW

作　　者：张震邦 汪小名 吴伟斌[1] 刘落实 黄冰瑜 郭协明 陈燊豪 ZHANG Zhenbang;WANG Xiaoming;WU Weibin;LIU Luoshi;HUANG Bingyu;GUO Xieming;CHEN Shenhao(Key Laboratory of Key Technology for South Agricultural Machine and Equipment of Ministry of Education,South China Agricultural University,Guangzhou 510642,China;TRIV Electronics Company,Guangzhou 510641,China)

机构地区：[1]华南农业大学南方农业机械与装备关键技术教育部重点实验室,广州510642 [2]广州智维电子科技有限公司,广州510641

出　　处：《实验室研究与探索》2020年第4期102-106,共5页Research and Exploration In Laboratory

基　　金：“十二五”农村领域国家科技计划课题研究子任务(2014BAD16B0103);“扬帆计划”引进创新创业团队专项(201312G06)。

摘　　要：车载音响设备已成为汽车必不可少的一部分,因此有必要进行汽车音频系统的性能检测。为解决目前音频设备测量仪器功能单一、图形显示效果差、可扩展性差和价格昂贵等问题。利用虚拟仪器技术构建了一个车载音响性能检测系统,实现了对AM、FM和音频功率放大器性能的测试。硬件系统由数据采集卡、车载音频设备、音频信号发生器和个人计算机搭建而成。软件系统用LabVIEW设计,测试结果可以直观地显示在显示器上。系统参照国家标准,相对误差在0%~12%,3次测量相对误差平均值在0%~5%,基本满足技术要求。传统音频测试需要140 min;该系统在测试时间上与传统音频测试方式相比缩减了40 min左右,提高了音频测试效率。该设计可为汽车性能检测系统的研发提供参考依据。It is necessary to test the performance of the car audio system,which is an indispensable part of the car.Currently,audio equipment measuring instrument has a single function,poor graphics display,poor scalability and high price.To solve this problem,an automobile audio performance test system is established by utilizing virtual instrument technology,including AM performance test,FM performance test,and the audio power amplifier performance test.The hardware configuration of the system is composed of the data acquisition(DAQ)card,automobile audio devices,the audio signal generator,personal computer and so on.And the operating interface of the system is designed by LabVIEW,which can directly display test results on screen by waveform or by value.Lastly,according to the national standards,the relative error of the system is about 0%-12%,and the mean of relative error of three measurements is within 0%-5%,basically meeting the technical requirements.A traditional audio test takes 140 minutes,this system greatly improves the testing efficiency by reducing some 40 minutes compared with the traditional test methods.This design can provide a reference for the development of automotive performance testing systems.

关 键 词：虚拟仪器 音频性能测试 数据采集卡 

分 类 号：TP386[自动化与计算机技术—计算机系统结构]