Polytec：光学测振，赋能多元行业

深入探究自然与科技领域的振动系统，离不开精密、灵活且非侵入式的专业测量工具。激光多普勒测振技术以其卓越的精度和可靠性，成为振动测量领域的标杆。

在工业研发的前沿阵地，Polytec 振动测量系统大显身手。从汽车整车、飞机部件、发动机到高耸建筑，再到微小的微型机器、硬盘驱动器组件，无论尺寸大小，都能被精确测量分析。在机械工程、声学，以及其他众多工程相关学科的研究中，Polytec 测振技术的应用场景极为广泛。

面对炽热表面、旋转部件，Polytec 系统实现远程精确测量；高频超声工具的分析，它也能轻松应对。通过对复杂精细结构进行三维动态分析，能全面揭示这些结构的真实动态特性。

选择 Polytec 振动测量技术，解锁振动结构背后的振动、声学与动力学奥秘，助力各行业实现技术的突破与创新。

模态分析 / 模态试验       有限元模型验证

激光测振仪关注微小细节

Polytec激光测振仪使用激光作为探测手段，无附加质量影响，带宽覆盖DC~GHz，非接触式测量生物医学样品、电子元件和微结构如MEMS等精密结构的振动、声学和动力学特性。Polytec激光测振仪可获取样品的频率响应并确定共振频率、脉冲响应和阻尼特性等，它可获取更多振动细节，振型可用于模型验证。 无论样品多大或多小- Polytec激光测振仪都是您的最佳选择!

Laser vibration measurement using laser Doppler interferometry in research and development
Laser vibration measurement using laser Doppler interferometry in research and development

光学振动测量的应用

心脏的泵血跳动、翅膀的高频振动、声音的产生与接收 —— 振动，无处不在，很难设想一个没有振动的世界。在自然生态与技术研发范畴，深入探究振动系统，精密、灵活且无创的测量工具必不可少。QTec®多通道干涉测量等前沿创新技术的问世，更是将测量的边界进一步拓展 。

使用激光多普勒干涉仪进行振动测量的基本原理
使用激光多普勒干涉仪进行振动测量的基本原理
激光振动测量，干涉仪设置
Laser vibration measurement, interferometer setup
振动测量依赖于评估背向散射光的频移
Doppler effect as the frequency shift of backscattered light
使用激光多普勒干涉仪进行振动测量的基本原理
使用激光多普勒干涉仪进行振动测量的基本原理
激光振动测量，干涉仪设置
Laser vibration measurement, interferometer setup
激光振动测量，干涉仪设置
Laser vibration measurement, interferometer setup
振动测量依赖于评估背向散射光的频移
Doppler effect as the frequency shift of backscattered light
使用激光多普勒干涉仪进行振动测量的基本原理
使用激光多普勒干涉仪进行振动测量的基本原理
激光振动测量，干涉仪设置
Laser vibration measurement, interferometer setup
振动测量依赖于评估背向散射光的频移
Doppler effect as the frequency shift of backscattered light
使用激光多普勒干涉仪进行振动测量的基本原理
使用激光多普勒干涉仪进行振动测量的基本原理
激光振动测量，干涉仪设置
Laser vibration measurement, interferometer setup
振动测量依赖于评估背向散射光的频移
Doppler effect as the frequency shift of backscattered light
使用激光多普勒干涉仪进行振动测量的基本原理
使用激光多普勒干涉仪进行振动测量的基本原理

用光测量振动

激光振动测量系统，也称为激光多普勒测振仪（图 1），基于激光干涉原理工作，采用对眼睛安全的激光（例如波长 λ = 633 nm、功率 P < 1 mW的氦氖激光）作为光源。在振动测量头内部，一个光束分离器将激光束分成两个部分：参考光束和测量光束。测量光束照射到振动表面上的一个点，由于多普勒效应，反向散射光的频率发生偏移。然后，该散射光与参考光束混合，产生一个拍频。

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Whitepaper Advanced optical vibration measurement
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如何测量振动速度？

光强的频率调制与振动速度成正比。每当被测振动物体移动距离达到氦氖激光半波长（λ = 316 nm）时，光强就会经历一个完整的从亮到暗的周期变化。光敏传感器将光强变化转换为电信号。这些亮暗周期的频率 fD 与被测物体的速度 v 成正比，关系如下：

fD = 2 × v / λ

下载关于光学振动测量的优势的完整白皮书。

Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement results of a disc brake system visualized as a vibration form, used in design improvement for eliminating brake squeal and unwanted noise
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement on airplane turbines and blisk designs reveal their typical vibration forms, optionally extended to dynamic stress and strain analysis
Vibration measurement through capped MEMS in final state in semiconductor manufacturing
Vibration measurement through capped MEMS in final state in semiconductor manufacturing

当下，在位移解调环节，受限于散粒噪声的振动测量技术，已能够实现远低于 pm 的振幅分辨率。如今，激光振动测量技术潜力巨大，应用范围极为广泛。这意味着，即使面对那些传统振动传感器技术难以施展的应用场景，也能够更精准、高效地获取振动测量数据 。

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