The sound pressure output at any point in the halfspace sound field and the polar radiation characteristic are predicted by using mechanical data. Surface strain measurements using a 3d scanning laser vibrometer. Ldv enables the analysis of nonideal or nonlinear systems. Msv400 the system a msv400 microscope scanning vibrometer system consists of the optical scanning system, an ofv551 fiberoptic interferometer, the ofv5000 vibrometer controller and the data management system dms, a workstation with adconverter and software. They determine operational deflection shapes and eigenmodes for nvh, acoustics, structural dynamics, ultrasonics and fem validation. This paper presents the use of a scanning laser vibrometer and a signal decomposition method to characterize nonlinear dynamics of highly flexible structures. Resonant modes are shown in the image to the right.
Pdf threedimensional scanning laser vibrometers enable extremely accurate noncontact measurement of the. Tell us about your structural vibration measurement task and well provide the scanning vibrometer solution for frequencies from dc up to 24 mhz and vibrational velocities of 0. The system software comes with the same out standing. Not available 1 h mode only model psv5003d scanning vibrometerh m hv preparation aps professional for arbitrary definition of measurement points and individual object properties s s s geometry data import geometry module for importing geometry data to the psv software. Polytec update works best on a measuring computer with a direct connection to the internet. New method for accurate strain measurements utilising a 3d. The detectable frequencies are in the range of neardc to 1 ghz or higher. Polytec update therefore always keeps you posted when there are updates for your polytec measurement or desktop software to ensure reliable. Simultaneous measurement using 3 sensor heads at high spatial resolution intuitive 3d animation of the measurement results with separation of outofplane and inplane vector components. Polytec scanning vibrometers are stateoftheart for noise and vibration measurement in research and development. The longfocal length lens can be seen above the sample, which is attached to the polytec micro systems analyzer differential vibrometer. The scanning laser vibrometer or scanning laser doppler vibrometer, was first developed by the british loudspeaker company, celestion, around 1979, further developed in the 1980s, and commercially introduced by ometron, ltd around 1986. The high frequency version extends the application range to.
Polytec scanning vibrometers make vibration measurement and analysis simple and efficient. Polytec 3d scanning vibrometers are stateoftheart for noise and vibration measurement in research and development. The psv scanning vibrometer measures vibrations on an entire surface in a noncontact and laser precise way. It is suitable for entry into the world of vibration and the study of complex structures large or small, says the company.
To evaluate the measurement uncertainty, reproducibility and representativeness of results, the measurement was repeated four times for a melting ice sample with 15 individual measurements. Now any number of colleagues can see the outstanding data taken on polytec systems as quickly as possible, on web pages, in powerpoint presentations or any other office documents. The msv400 microscope scanning vibrometer is the successor to the awardwinning. Scanning vibrometers opens up completely new opportunities for the analysis of structural vibrations.
The measurement system offers powerful software for dynamic measurements. Please use one of the following formats to cite this article in your essay, paper or report. A scanning vibrometer is easy and intuitive to operate. The new polytec psv4003d scanning laser vibrometer is the perfect measurement instrument for gathering 3dimensional vibration data of complex structures. School of computer science, engineering and mathematics. About lndvl linear and nonlinear dynamics and vibrations.
Whatever question regarding vibration measurement drives you, there is a psv polytec scanning vibrometer to provide the answer for frequencies from dc to 25 mhz, capturing vibrational velocities of 0. Polytec update is a software tool that provides your polytec products with the latest software releases and hotfixes. George washington university hampton, va 23681 richard s. An introduction to scanning laser vibrometry for non.
Novel applications of laser doppler vibration measurements. Polytec scanning laser doppler vibrometer vibration analysis. Polytecs new uhf120 vibrometer laserdoppler vibrometers ldv can characterize the outofplane vibrations at ultrahigh frequencies. Polytecs uhf120 extends the vibration frequency bandwidthup to 600 mhz. No matter your measurement need in research, development and production or even for longterm monitoring, there is a polytec system to provide the answer. The polytec scanning vibrometer utilises a heliumneon laser to measure the vibratory displacement and velocity at a point on an object in the direction of the laser beam through laser heterodyne. It is an instrument for rapid noncontact measurement and imaging of vibration. The psv400 scanning vibrometer comprises a compact sensor head with an integrated scanning unit, a controller and a data acquisition and management system. Polytec uhf120 ultra high frequency vibrometer for micro and nanoscale system bandwidth up to 1. Msv400 is the ideal tool for a quick and accu rate motion analysis of mems devices. Measurement and evaluation of natural frequencies of bulk. Multipoint vibrometer mpv800, polytec scanning laser vibrometer psv400, polytec used with polytec software and an alta solutions as1220 automated impact hammer mistras groups peripheral component interconnect bus acoustic emissions system pci2 2 channel ae system on a card. Scanning vibrometer deutschubersetzung linguee worterbuch.
Polytec psv500 3d scanning vibrometer acquire and analyze vibrations in three dimensions polytec 3d scanning vibrometers are the stateoftheart tools to quickly and accurately determine operating deflection shapes and eigenmodes for structural vibration validation with reliable experimental data. The scan viewer includes an activex control, which can be embedded in microsoft office applications and in internet explorer. It is suitable for a large range of different measurements from complex components up to complete vehicle bodies. Its easy to transport, easy to setup and has fast time to measurement. Fields where they are applied include automotive, medical, aerospace, micro. Psv500 scanning vibrometer fullfield vibration measurement. Laser doppler vibrometry ldv has been widely used in engineering applications involving noncontact vibration and sound measurements. Brochure psv polytec scanning vibrometers fullfield. Complete with a new optical arrangement, the system retains the advantages.
Upgrade or expand it to a full 3d system, once your applicationspecific demands grow. Bridging design and real world 20 years of polytec. The laser light of the class ii hene laser has a wavelength of 633nm which corresponds to red light. This flexible measurement platform allows researchers and developers to master the most challenging vibration measurement tasks with ease. These components are complemented by a powerful software package that controls the scanners, data processing, and visualization of the measurement results. Benefits of polytecs msa400 micro system analyzer combined with a vacuum chamber.
The polytec psv3d was employed to measure vibrations on the engineering model in 3d. The psv400 scanning vibrometer is a measurement tool for resolving noncontact noise and vibration issues in research, development and education. A laser doppler vibrometer ldv is a scientific instrument that is used to make noncontact vibration measurements of a surface. For over 40 years polytec has provided hightechnology, laserbased measurement solutions to researchers and engineers. Pdf surface strain measurements using a 3d scanning. The psv400 offers technical excellence with powerful software for dynamic measurement, analysis and realtime chromatic display of data. The new revolutionary geometry scan unit for the psv400 and psv4003d. Scanning laser vibrometer with dedicated computer control and data acquisition systems polytec psv300u. Polytec laser doppler vibrometers are used to precisely measure mechanical vibrations, quickly, easily and free from mass load, crosstalk or feedback problems.
Learn about polytecs nonintrusive and highly productive vibration measurement technology for automated multipoint scanning of structures. Nonlinear structural dynamics characterization using a. The engineering model was placed in multiple positions to permit line of sight access from the polytec sensor heads to the chemin inlet inside and outside, the chemin collection screen, the chemin funnel, and the sam inlets. We develop, produce and distribute optical measurement technology solutions for research and industry. The convenient way of sharing your scanning vibrometer measurement data with your colleagues and project partners. For the love of physics walter lewin may 16, 2011 duration. Fully automatic vibration measurement in 3d through the intelligent combination of a 3d scanning vibrometer with an industrial robot, polytec offers you a unique automated measurement station. Polytec psv500 3d scanning vibrometer netscope solutions. Complete with a new optical arrangement, the system retains the frequency range. Engineers can use polytecs psv4003d scanning vibrometer to quickly and easily measure the real vibration characteristics of prototypes and preproduction products. Polytec offers laser doppler vibrometers designed as real solutions to our customers difficult manufacturing, development and research problems. The scn analysis software performs visualization, animation and analysis of the mechanical vibration using the scanned data which is provided by the vibrometer.
Gaspar research engineer structural dynamics branch nasa langley research center hampton, va 23681 micah j. Integrating an environmental chamber with a microscanning. The polytec 3d scanning laser vibrometer, is capable of evaluating test specimen surface areas ranging from mm 2 to m 2 at a standoff distance between 0. With psv500 scanning vibrometers, you can reliably and precisely complete your vibration measurement tasks in research and product development. Membrane vibration studies using a scanning laser vibrometer james l. This technique has also been used in some biomedical applications including hearing research. Polytec scan viewer is a free viewer that can display, visualize and manipulate scanning vibrometer data graphically in microsoft office applications. With the psv scanning vibrometer, you reliably and precisely measure vibrations in research and product development. Polytec psv400 scanning vibrometer forschungsinfrastruktur. Scanning vibrometer system polytec psv400 with psvsunihm software and psvsimpgeo geometry import option. Membrane vibration studies using a scanning laser vibrometer. Scanning vibrometers adopt to your measurement needs.
The psv500 notebook scanning vibrometer is a high resolution low noise vibration measuring system from polytec. Polytec msa500 micro system analyzer is located in room 2 calit2 building building 325 on uci campus mapthe polytech msa500 micro system analyser called the vibrometer is a fullyintegrated structural dynamics and surface metrology system. The standard for noncontact measurements and 3d visualization of vibration data just got better with the release of the psv500. Our quality innovative products have an excellent reputation. Surface strain measurements using a 3d scanning laser. At the heart of every polytec psv400 system is the laser doppler vibrometer. The deflection shapes and eigen modes detected help you with everything from nvh, acoustic and structurally dynamic issues to ultrasonic analyses, fem validation and nondestructive testing. In simple terms, this instrument focuses one beam of laser light on a spot in the sample in order to accurately track the position and velocity of.
Polytecs vibrometers are indispensable tools to optimize parts and goods and to investigate natural dynamic processes originally developed to characterize manmade products, technology and systems, noncontact laserdoppler vibrometry is also exploring measurements that unravel the mysteries of biological structures the heart beats, wings flap, sounds are sent out and received life. Psv5003d scanning vibrometer fullfield 3d vibration. Polytec msa500 micro system analyzer vibrometer imri. Scanning vibrometry describes vibration measurement whereby the laser beam sequentially scans the samples surface using a range of singlepoint measurements. In contrast to existing scanning ldv techniques which use a 2d camera for the manual selection of sample points, we use a 3d timeofflight camera in combination with a cad file of the test object to automatically obtain measurements at predefined locations. Xtra sensitivity and versatility ofv5000 laser vibrometer polytec now introduces xtra technology for its ofv5000 modular vibrometer series, featuring xtra optical sensitivity. A polytec pi psv200 scanning laser vibrometer is used to measure transverse velocities of points on. The scan viewer also works as an independent application and offers the same highperformance representation and animation options included in the highlights for the polytec scanning vibrometers. Polytec manufactures a wide range of laser vibrometer, velocimetry and surface topography instruments and have been bringing light into the darkness of noncontact measurement for more than 50 years. In this paper, a new fully automated scanning laser doppler vibrometer ldv measurement technique is presented. Videotriangulation is a registered trade mark of polytec.
In this paper, the application of a polytec 3d scan. Polytec update therefore always keeps you posted when there are updates for your polytec measurement or desktop software to ensure reliable measurement results and smooth working with polytec products. Our commitment is to provide the most precise and reliable optical instruments and sensors available for noncontact measurement, setting polytec apart from the competition as the gold standard in the design and manufacture of vibrometer and velocimeter systems. Polytec manufactures a wide range of laser vibrometers that are the acknowledged goldstandard for noncontact vibration measurement. Sem image of the 4 mm diameter pzt circular membrane. The ofv5000 xtra vibrometer controller with the new mlvi120 sensor head xtra gathers highfidelity data from all surfaces even on dark, biological, rotating or. Application of laserdoppler vibrometers in hearing and. Psv500 scanning vibrometer from polytec measure vibrations without contact, reliably enabling precise vibration analysis in research and product development. An internal generator using polytec software control provides. The psv500nb scanning vibrometer notebook allows noncontact, zeromassloading measurements, making it suitable for examining lightweight surfaces, as well as hot, cold and dangerous surfaces. This results in transfer functions for each and every measurement location.