Valve Motion Measurement for Automotive Engine

Name ChannelsBandwidthWorking DistanceLaser ClassDatasheet
LVM1000 1 2 - 20 kHz 100 mm 3B
LVM4000 4 2 - 20 kHz 100 mm 3B
Julight ​Laser Valve Motion Measurement for Automotive Engine are compact systems for the precise and easy measurement of the valvetrain motion.
The LVM1000 includes one laser head for accurate valve displacement measurement, based on the triangulation principle. The internal analog electronic processing circuits provide three simultaneous, real-time outputs: displacement, velocity, acceleration. Thus, there is no need to calculate velocity and acceleration numerically off-line after the acquisition, hence achieving an unprecedented signal-to-noise ration, and avoiding numerical errors.
Selectable low-pass filters are available with bandwidth of 2kHz and 20kHz.
The LVM4000 includes up to two laser heads for accurate valve displacement measurement, based on the triangulation principle, and one laser vibrometer head based on the interferometric Doppler principle, using the proprietary Julight Self-Mixing configuration.
The internal analog electronic processing circuits provides not only the simultaneous, real-time outputs for displacement, velocity, and acceleration, but it also offers the possibility to subtract the displacement motion of the engine head measured by the laser vibrometer from the valve displacement measured by the triangulation head(s). This is highly useful to get rid of the unwanted vibration motion of the head, and to obtain a clean and smooth valve motion signal.
When two laser heads are used within the same cylinder, the wavelengths of the light emitted by the two lasers are selected to be different (630nm and 660nm), to avoid any possible interference and cross-talk.
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Advert modificato
Advert for the LVM1000/LVM4000 products.
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LVM1000_modificata_3
Modular LVM serie front pannel.
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Triangulation laser heads during measurements on a valve.