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高清晰声学照相机

 
这是一个为稳态和非稳态的声音进行快速声源定位的方法。利用波束成型技术允许从更远的距离定位声源,它是专为大型或笨重的结构、以及有限时间情况下提供的出色的解决方案。
 

HD cam 2 LR.jpg当时间紧迫时,只有一个非常快速的解决方案是可行的,这就是为什么工程师依赖全新的LMS Test.Lab高清晰声学照相机解决方案。这是一个为稳态和非稳态的声音进行快速声源定位的方法。利用波束成型技术允许从更远的距离定位声源,它是专为大型或笨重的结构、以及有限时间情况下提供的出色的解决方案。

波束成型的优势是对高频率的精确定位。其空间分辨率(即定位精度)是与频率和距离成反比的。由于LMS Test.Lab高清晰声学照相机扩展到了近场或声聚焦,其精度水平相比传统的波束成型技术提高一倍,这也是称之为“高清晰”的一个原因。传统的波束成型算法不能用于近场声源定位,LMS Test.Lab高清晰声学照相机在近场测试时会自动采用声聚焦算法。

LMS Test.Lab高清晰声学照相机解决方案包括一个带广角摄像头的环形麦克风阵列,即使在近场的情况下,也可以获得整个表面的清晰画面。标准配置为36个或54麦克风的环形阵列,还包括一个激光测距仪来自动测量离声源的距离。

LMS Test.Lab高清晰声学照相机解决方案支持高达20kHz的准确定位。可以在时域、频域和阶次域分析处理,生成报告。分析结果可以用图片以及动画表示。作为分析过程的一部分,可以监听识别的热斑。
为了提高整体试验效率,LMS可根据不同的要求,如频率范围、精度、成本和时间等提供其他声源定位技术。LMS技术还包括声强法(支持声压—声压和声压—振速探头)及声全息(结合声聚焦的声全息解决方案)。



特点

  • 可同时用于远场和近场测量的独特LMS Test.Lab硬件和软件
  • 使用内置的测距仪自动测量到声源的距离
  • 声压动画可为时间/频率的函数
  • 包括图片和视频的报告

优点

  • 非常快速的结果获取
  • 适用于稳态和瞬态工况
  • 相对于传统波束成型方案有双倍精度



    Covering a range of industries, LMS application cases let you discover how LMS solutions help our customers solve their real-life engineering challenges. 

    Engineers at International Automotive Components use the new LMS Test.Lab High Definition Acoustic Camera to identify noise sources in seconds

    International Automotive Center IAC.jpgEngineers at International Automotive Components (IAC) – the largest acoustic materials supplier to the automotive industry – use the new LMS Test.Lab High Definition Acoustic Camera to identify noise sources in seconds compared to hours and days needed with traditional methods. Using this tool, engineers gain deeper insight into acoustic behavior and shorten turnaround times in lowering interior car noise for automakers around the world. 




    Vibro-acoustic testing on the high seas


    CETENA.jpgCETENA Ship Research Center uses LMS Test.Lab for a variety of standard – and not so standard maritime equipment testing. Everything from worst case scenario shock tests to the acoustic resonant frequency of a Murano chandelier on a mega-cruise ship is subject to the expert scrutiny of the CETENA testing team in Genoa, Italy. And this team counts on the powerful LMS testing solutions that can deliver results in minutes instead of days as billion-euro projects hang in the balance.



    Acoustic Holography, Noise Source Identification and Quantification

    acoustic holography noise source identification quantificationLMS Acoustic Holography performs a spatial transformation of sound fields – meaning that it takes a measurement of sound pressures along a certain plane and predicts what the readings would be anywhere else. This can be towards the nominal source (back propagation), towards the far field, or in any other direction or plane. Special techniques are available when working in complex multisource environments. Acoustic Holography is a powerful tool that helps to solve noise source identification and quantification problems.



    Acoustic beamforming

    acoustic-beamforming-c.gifFinding out the exact source of a sound is a tough challenge for any acoustics engineer. Since the early 90’s, a number of methods, based on microphone arrays, have matured and are used throughout numerous industries. In general, the methods fall into three categories: near-field acoustic holography, acoustic beamforming, and inverse methods. Depending on the test object, the nature of the sound and the actual environment, engineers will have to select one method or the other. What that means for the Beamforming technique used as an acoustic camera is described in more detail below. Find out more!




    Brochures
    下载LMS Test.Lab Acoustics声学试验解决方案

    Images

    High Definition Acoustic Camera LR 02.jpg HD cam 1 LR.jpg High Definition Acoustic Camera LR 04.jpg
    LMS Test.Lab高清晰声学照相机采用独特、新颖而强大的处理方法。 完整的集成解决方案:多通道阵列、采集、互动分析和多媒体报告的硬件和软件平台。 最新的算法提供在整个表面不同量级的多声源的精确定位。




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