Features
- Slow-motion visualisation of fast events
- Recording and commenting of videos for documentation
- Easy usage
- Integrated viewer for recorded videos (AVIs)
- Constant light - no stroboscope light
- Optional software for image analysis:
- LIMtrackLIMtrack
Measurement of the motion and resonance curve
- Istra4D/Q400
Spatially resolved measurment of 3D-displacement and deformation (modal shape)
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With the StrobeCAM recorded motion of a connector panel on a electrodynamic shaker.
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Advantages against high speed cameras:
- Lower price
- Higher camera resolutions available
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Advantages against strobe lights:
- Works with constant LED light
→ No irritating (unhealthy) flash light
- Integrated video recording and documentation
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Technical Specifications
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Frequency range:
Cameras:
Signal input:
Delivery:
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1Hz to 60kHz
0,3 MPixel to 29 MPixel
Color or monochrom
COLA signal from 0,5V amplitude
Camera, lens, trigger electronics, illumination, StrobeCAM software
Optionally: Tripod, computer (laptop or desktop)
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Applications
- Vibration testing and vibration analysis
- 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) 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.
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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 electronics (PhaseTriggerLS) analysed the input signal and generated a precisely phase synchronised trigger signal for the camera. The vibration frequency is allowed to be much higher than the free running camera recording frequency.
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Still Image
Example: Assuming, that the the camera can record images with max. 30Hz auf 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")
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Phase Sweep
At triggering with temporal varied phase (="phase sweep") the objects motion is shown in slow motion. The sweep frequency can be varied.
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Our light sensitive, low noise and high resolution industrial cameras show more details compared to high speed cameras.
Software
| Software |
Functionality
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| 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
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Visualisation and Recording
