Vibrometry

Reliable sensors for industrial quality control
In industrial manufacturing of consumer and capital goods, both product and process optimization play the key role for sustainable economic success. Quality assurance in production therefore relies on fast, automated and robust testing and measurement instrumentation.
Acoustic quality control as the detailed detection of structure borne noise is quite a versatile, non-destructive testing method. Acoustic inspections are designed to ensure the quality and reliability of products and thus the entire manufacturing process. Acoustic quality testing equipment supplies information about vibration behavior in real-time and helps keep detect deviations and reduce rejects early in the production process, way before a critical failure. Polytec IVS Industrial Vibration Sensors inform in real-time about the condition of test objects.
Polytec offers complete solutions: sensors, software and hardware modules. The laser vibrometers are robust and reliable sensors for quality control of complete parts in final production testing or in end-of-line testing. Major benefits using laser sensors are the non-contact and non-destructive nature, the fast setup and simple integration into industrial manufacturing processes and the flexibility to cope with varying samples in manufacturing lines using auto-focus. Polytec vibration sensors are compatible and easy to integrate into existing test stations as comprehensive, powerful production testing solutions. Use also the Polytec diagnosis software QuickCheck for automatically measuring and evaluating the measurement data for reliable pass-fail decisions and classification of parts.
Acoustic quality control with laser precision
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CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.

IVS-500 Industrial Vibration Sensor
The Industrial Vibration Sensor is key to fast and non-contact vibro-acoustic quality inspection, structure-borne noise analysis and reliable pass-fail decisions. Its robust and compact design means you can optimally integrate it into process control systems...
Quickly and contactlessly testing white goods
In the consumer and capital goods industries, both product optimization and process optimization play a vital role when it comes to economic success.
Experience has shown that spot checks performed on systems selected at random do not result in a reliable outcome. Only carrying out a complete check on the finished products guarantees a high quality standard. You should therefore opt to perform vibration tests with laser vibrometers from Polytec. Vibration analysis is ideal for distinguishing good products from faulty ones, which is why it is advisable to use vibrometers for quality control purposes. Laser vibrometry has established itself as the method of choice for non-contact testing. With the help of the laser vibrometer, the system reliably detects potential defects such as faulty or loose components or machine imbalance and provides information on the specific cause of the fault
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A practical example:
Electrically driven household appliances or their components which generate unwanted vibrations and noise are reliably detected in production by laser vibrometers and removed from the process. Examples include washing machines, vacuum cleaners and electric toothbrushes.

Acoustic quality control with laser precision
Dear visitor, in order to be able to watch our videos please accept the cookies. All information about the usage of cookies can be found in our privacy policy
Change cookie settingsRelated products

CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.

IVS-500 Industrial Vibration Sensor
The Industrial Vibration Sensor is key to fast and non-contact vibro-acoustic quality inspection, structure-borne noise analysis and reliable pass-fail decisions. Its robust and compact design means you can optimally integrate it into process control systems...
Zero-fault production of injection valves
Greater energy efficiency and lower environmental impact are two fundamental requirements for combustion engines. In this regard, it is essential that the components’ planned parameters are always exactly adhered to, so as to ensure faultless production without any rejections or rework. Use Polytec vibrometers for zero-fault production testing.
A practical example:
To name just one critical example, Polytec’s laser vibrometers are used to carry out a complete check on injection valves for vehicles’ combustion engines. The valves’ opening and closing behavior is checked during this process so the fuel throughput can be optimally controlled.

Acoustic quality control with laser precision
Dear visitor, in order to be able to watch our videos please accept the cookies. All information about the usage of cookies can be found in our privacy policy
Change cookie settingsRelated products

CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.
Manufacturing medical devices with maximum precision
People’s health is always the top priority in medicine. Therefore it is particularly important to ensure a consistent level of quality and reliability in medical device production. High-precision measurement and rapid analysis are very much in demand here, since even minor deviations can sometimes lead to unforeseeable and serious consequences.
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A practical example:
Pari GmbH manufactures nebulizers to treat respiratory diseases that accurately meter the liquid drug. The liquid is pressed through the holes in a membrane, which is stimulated to produce ultrasonic vibrations by piezo elements, and atomized. Using laser vibrometry guarantees a consistent nebulizer quality and thus an excellent reproducible drug effect for the patient.
Polytec’s laser vibrometers have even analyzed the membrane’s vibration behaviour at the product development stage and thereby enabled consistent design and functionality optimization.
Complete quality control in production also uses the contactless measurement method to ensure zero-fault quality. A semi-automatic measuring station was developed together with Polytec for this very purpose. A CLV Compact Laser Vibrometer measures the membrane’s movement with zero contact. The QuickCheck test software from Polytec saves and analyses the measurement data during production and allows for a good / bad decision to be made directly. Thanks to QuickCheck’s flexible architecture, quality engineers were able to continuously improve the evaluation algorithm and thereby reduce pseudo rejections.

Acoustic quality control with laser precision
Dear visitor, in order to be able to watch our videos please accept the cookies. All information about the usage of cookies can be found in our privacy policy
Change cookie settingsRelated products

CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.
Zero-fault production in the engine cold test
A complete check is carried out during the final inspection in combustion engine production for vehicles. Each individual unit is extensively tested before leaving the factory. For example, it is checked for undesirable noise and vibration when subjected to so-called noise, vibration and harshness (NVH) tests.
An electric motor pulls/spins/powers/drives the combustion engine during the engine cold test. In addition to measuring the vibration and noise behaviour of the engine as a whole, the component or assembly faults are also identifiedusing the vibration signal measured contactlessly with one or more laser vibrometers, so that targeted, effective repair or rework can be carried out.
You can use Polytec’s laser vibrometers to identify the following fault patterns, for example: damage or production deviations on cam shafts, incorrectly set valve clearance, faults on ancillary units such as high-pressure pumps, gear tooth faults, bearing damage or foreign bodies in the combustion chamber.
Documents
A practical example:
Saab Medav Technologies, based in Uttenreuth and Ilmenau, specializes in digital signal processing, marker systems, radio monitoring, vibration analysis, information processing and measuring technology for quality checks. The Bavarian company has been relying on the high quality, precision and reliability of Polytec’s vibration measurement systems for more than 20 years now. And with good reason too, as Olaf Strama explains:
“We have been using laser vibrometers for vibration measurement since the mid-1990s. We started with a Polytec CLV, and then we purchased a batch of IVS-200 industrial vibration sensors. In the meantime, we have used its successor, the IVS-400, especially for measurement points that are difficult to access or where a high measurement bandwidth is required for automatic production.
Dipl.-Ing. Olaf Strama, Director of Industrial & Automotive Solutions (IAS) at Saab Medav Technologies

Acoustic quality control with laser precision
Dear visitor, in order to be able to watch our videos please accept the cookies. All information about the usage of cookies can be found in our privacy policy
Change cookie settingsRelated products

CLV-2534 Compact Laser Vibrometer
The flexible vibration-measuring device with an integrated camera and a compact design is ideal for quality assurance and research. Additional microscope lenses expand the range of possible tasks that you can complete to include very small samples.