End-of-line vibration testing with laser sensors

End-of-line or in-line quality control

End-of-line (EoL) testing is the process of checking the quality of the manufactured product at the end of the production line and assessing it as OK or not OK. In contrast to EoL testing, in-line testing involves testing and evaluating product quality directly during the manufacturing process. Depending on the product to be tested and the quality criteria, different sensors are used to ensure the quality of the delivered product.

Learn how laser-optical sensors and non-contact testing of the acoustic signature helps in end-of-line testing!

デモのご依頼

Vibro-acoustic end-of-line quality control

Accelerometers, microphones or Laser Doppler Vibrometers (LDV) are generally used when quality control is required for vibration, acoustics and/or structure-borne noise. Laser Doppler vibrometers have the advantage of being non-contact and therefore do not require a sensor feed as is the case with accelerometers. Also, unlike a microphone, LDVs cannot be influenced by ambient noise.

Advantages of EoL vibration testing

Non-contact: Non-reactive, even in hard-to-reach areas

Auto focus: Reliable measurement results at short and long distances

Reliable: Unaffected by ambient noise

High precision: Valid data detecting even small differences

Easy integration: Interfaces for PLC and test systems

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Robotic test cell with automated acoustic quality control by an IVS-500 laser sensor (thanks to Fruitcore & RTE)

VibroOne acoustic quality inspection of electric motors in a production line

Laser precise, non-contact readings for in-line resonance testing

SonicTC QuickCheck software for vibration and acoustic testing in production environments

Robotic test cell with automated acoustic quality control by an IVS-500 laser sensor (thanks to Fruitcore & RTE)

VibroOne acoustic quality inspection of electric motors in a production line

Laser precise, non-contact readings for in-line resonance testing

SonicTC QuickCheck software for vibration and acoustic testing in production environments

End-of-line vibration testing with laser vibrometers

In addition to the reliability of the test equipment, end-of-line testing also depends on easy integration into the test station and automation capability to achieve the highest possible test throughput. Laser Doppler vibrometers (LDV) offer advantages in all these areas.

Because vibrometer EoL testing works in a non-contact way with a flexible, adjustable working distance, LDVs can reliably measure at some distance from the test specimen. In addition, a signal can be recorded and analyzed at measurement points that are inaccessible to accelerometers. The high accuracy means that extremely precise data can be recorded and even the smallest changes in test results can be detected. Integration into the production system and communication with the PLC process control system is also possible.

Stand-off distance, frequency and min/max acceleration values?

見積依頼

Become an EoL testing expert: tips, tricks & video tutorials

The IVS-500 Industrial Vibration Sensor from Polytec is a dedicated and flexible measuring device for end-of-line testing on behalf of the vibro-acoustic signature or a produced part or assembly.

This exclusive section (login) provides an overview, the basics of acoustic testing using laser vibrometers and a practical benchmark and comparison to alternative EoL testing methods, as well as valuable tips & tricks in video tutorials for the use and handling of the IVS-500 Industrial Vibration Sensor - for starters, users, integrators and experts.

Learn more

Related products

IVS-500 Industrial Vibration Sensor for acoustic quality inspections in-line

レーザドップラ振動計 IVS-500

レーザドップラ振動計 IVS-500は、品質管理の用途に最適な非接触振動計です。測定周波数帯域は最大100 kHzであり、インライン製品検査やEOL試験に最適で、すばやく高精度な振動音響品質検査や、構造物に起因するノイズ分析、信頼性の高い合否判定が可能です。堅牢でコンパクトな設計であり、既存のプロセス制御システムに容易に統合でき、アプリケーションに合わせた短時間の測定を実現できます。レーザなので接触式センサに見られるセンサ自身の摩耗がなく、マイクロフォンによる音響検査時に必要な外部音響を遮断するための防音機構も必要ありません。

スキャニング振動計 PSV QTec

PSV QTec スキャニング振動計は、フルフィールド振動マッピングにおける測定感度の基準を確立します！特許取得済みのQTec®テクノロジーは、赤外（SWIR）レーザーに基づくマルチパス干渉計を使用し、DCから25MHzまでのあらゆる表面で高忠実度の測定を可能にする。PSV QTec は、特に暗い場所や生物、回転、移動する物体などの試験時間を大幅に短縮し、NVH、音響、構造ダイナミクス、超音波、FEM バリデーション、NDT において、実稼働振動形状や固有振動モードを決定することができます。

End-of-line vibration testing