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StrobeCAM - Camera system for vibration analysis and vibration measurement

Videostroboscope with added value

The StrobeCAM visualizes live and records vibrations and rotations in slow motion; for example on the electrodynamic shaker, on an engine test stand, at inaccessible locations or at miniature objects. The StrobeCAM is a user friendly and inexpensive alternate solution to high speed cameras and it adds a number of possibilities compared to a strobe light.
The slow-motion visualization speed is user adjustable and constant for all input frequencies. Therefore the human eye can easily identify the object movement. With this innovative principle, the object movement can be clearly visualized over an entire frequency sweep from e.g. 5Hz to 2kHz.
The StrobeCAM base system consists of camera with lens, LED illumination, trigger controller, tripod and the StrobeCAM software.

Foto of the StrobeCAM Videostroboscope
Video of a vibration
Video of Ultrasonic vibration
Diagram of a resonance curve
StrobeCAM
Layer für Überschrift
Layer für Überschrift
Slow motion video
Ultrasonic vibration
Resonanzkurve
 

 

 checkmark   Live slow motion visualisation and video recording of object vibration

checkmark   Easy usage as Videostroboscope

checkmark   Quantitative motion analysis by optional image analysis 

checkmark   2µs time resolution

Innovative working principle

The StrobeCAM trigger unit controls precisely the camera's exposure moment related to the periodic process. The powerful LED illumination is constant in time. The object movement gets frozen due to the short camera exposure time which is comparable to the short duration of a strobe light pulse. The StrobeCAM trigger unit analyzes in realtime the input signal (COLA signal) and synchronizes the camera to it. The slow-motion visualization is user-friendly with an adjustable speed, e.g. 1 cycle/second and is independent of the excitation frequency. With this innovative principle, the component movement can also be clearly visualized over an entire frequency sweep.

The standard system is equipped with an HD camera (2000x1200 pixels) and has a time resolution of 500kHz. Therefore the StrobeCAM gives a better quality slow motion image than an expensive high-speed camera. (A Typical high speed camera has only 512x56 pixels at 480kHz recording rate)

 

Features

  • Live slow-motion visualisation of fast periodic events
  • Recording and commenting of videos and image sequences for documentation
  • Easy and intuitive system usage
  • Integrated viewer for recorded videos (AVIs)
  • Constant LED light - no stroboscope light
  • Optional software for image analysis:
    • LIMtrack
      Measurement of the motion and resonance curve
    • Istra4D/Q400
      Spatially resolved measurement of 3D-displacement and deformation (modal shape)

Slow motion video of a vibrating connection plate on an electrodynamic shaker
With the StrobeCAM recorded motion of a connector panel on a electrodynamic shaker.

 

 

 Advantages against high speed cameras:
  • Lower price
  • Higher camera resolutions
  • Recording durations of minutes for complete frequency sweeps
 Advantages against strobe lights:

Technical Specifications

Frequency range:

Cameras:

Signal input:

Delivery:
 

1Hz to 60kHz

0,3 MPixel to 29 MPixel
Color or monochrom
Exposure times down to 1µs

COLA signal from 0,5V amplitude

Camera, lens, trigger unit, LED light, StrobeCAM software
Optionally: Tripod, computer (laptop or desktop)

StrobeCAM base system consisting of camera with lens, LED illumination, trigger controller, tripod and the StrobeCAM software.

Applications

  • Vibration testing and vibration analysis
  • Usage with elektrodynamic Shaker
  • Visualisation, recording and documentation of object motion
  • Measurement of resonance curve (frequency response)
  • Measurement of resonance frequency
  • Contactless component testing
  • Transportation tests
  • Environmental testing
  • Zyclic Tests / rotating objects
  • Fatigue testing (LCF/HCF/VHCF) in combination with Q400-DIC

Functional principle

Fast Events

The visualisation and measurement of fast events is typically done with high speed cameras.
If the event is periodic a flashing strobe light can be used to show the motions.

Video Stroboscopy

The term video stroboscopy origins from the diagnostic research at vocal cords. The motion of the voting lip is observed with a camera, endoscope and stroboscope illumination.

StrobeCAM

The StrobeCAM is based on the precise synchonization of a digital camera to the periodic event. The illumination is done by temporal constant LED light.  The synchronisierung of the digital camera requires a peridic input signal (COLA) from the test system (frequency generator, rotation encoder). Our microprocessor controlled trigger controller analyses the input signal and generates a precise phase synchronised trigger signal for the camera. The vibration frequency is allowed to be much higher than the free running camera recording frequency.

 

Still Image

Example: Assuming, that the camera can record images with max. 30Hz and the vibration frequeny is 100Hz. Then the trigger system will generate trigger signals every 3rd period of the input signal. The following diagrams show the time courses:

At triggering with constant phase relation to the input signal the motion of the objects' vibration is freezed ("Still image")

StrobeCAM camera trigger principle with fixed phase (standing image)

 Strobecam camera image with fixed phase

 

Phase Sweep

At triggering with temporal varied phase (="phase sweep") the objects motion is shown in slow motion.
The sweep frequency, e.g. 360° within 1 second defines the slow motion visualization speed.y
 
StrobeCAM camera trigger principle with phase change (slow motion video)
 Slow motion video of vibration due to phase sweep camera trigger
 
Our light sensitive, low noise and high resolution industrial cameras show more details compared to high speed cameras.

Software

Software Functionality

StrobeCAM

Camera control:

  • Adjustment of exposure time and gain
  • Selection of binning mode
  • Selection of area of interest

Video recording

  • Setting of slow motion rate
  • Manual start and stop of recording
  • Automatic start and stop of recording (Frequency range setting)
  • Recording of numbered image sequences
  • Automatic generation of compressed AVI videos
  • Selection of images for AVI recording
  • Frequency, phase and date+time can be user defined stamped in the image

Playback of recorded videos

  • Viewer for recorded AVI videos
  • Play forwards and backwards with user defined speed
  • Single image step forwards and backwards

Documents-Downloads

Applications Vibration Analysis

Do you have questions related to our
products or services ?

Tel +49 (0) 2151 36528 00

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