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Government Of India
Department of atomic energy
Technology transfer & Collaboration division

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Laser Vibrometer (Kampan)


This high-resolution, non-contact optical triangulation based vibration measuring instrument (Kampan) for non-contact vibration measurement can measure vibration from a stand-off distance of 200 mm in the frequency range of 0.1 Hz to 1 kHz with an accuracy of 1% of measured frequency value and amplitude range of ±2 µm to ± 5 mm with a resolution of 1 micron.

In contact dependent techniques, the sensor e.g. accelerometer, is kept in touch with the vibrating object which may load the object and cause error in measurements. The technology offered does not need physical contact with the object thus does not affect the frequency of vibration. 

Laser based vibration sensor offers distinct advantage due to its non-contact, non-destructive nature and fast speed. It can be used for on-line monitoring of vibration. It is simple in construction, low cost and portable.

APPLICATIONS

  • For vibration measurement of motors, pumps, machines in industry
  • For structural vibration measurement
  • Measurement of Vibration of laser Dye cell
  • Measurement of Vibration in an optical table

SPECIFICATIONS

1.Method usedOptical Triangulation
2.Vibration Frequency range0.1 hz to 1 kHz
3.Vibration amplitude Range±2 µm to ± 5 mm from center
4.Resolution1µm
5.Output voltage± 5 V
6.Light sourceDiode Laser
7.Dimension (mm)280 x 270 x 85
8.Power supply230VAC, 1 watt

Laser based vibration sensor offers distinct advantage due to its non-contact, non-destructive nature and fast speed. It can be used for on-line monitoring of vibration. It is simple in construction, low cost and portable.

Principle of Operation: Low power visible laser beam emitted from the instrument falls on the target and the backscattered light is collected by suitable optics to focus on a position sensitive detector (PSD). The position of focused spot on the detector is related to the distance of the target from the sensor. The sensor is positioned in such a way that the optical axis of the lens in the instrument is normal to the vibrating surface. As the object moves to and fro (vibrates), the focused spot on the PSD also moves. The movement of focused spot on the PSD is converted into proportional voltage by the electronic circuit of the instrument. The output voltage level of the sensor is proportional to the displacement of the target from its center position. The sensitivity of sensor is 1 mV/ µm .The voltage signal carries the information about the vibration amplitude and vibration frequency of the object . This information is extracted by feeding the signal to a PC through ADC card and using in-house developed software on PC.

APPLICATIONS

  • For vibration measurement of motors, pumps, machines in industry
  • For structural vibration measurement
  • Measurement of Vibration of laser Dye cell
  • Measurement of Vibration in an optical table

SPECIFICATIONS

1.Method usedOptical Triangulation
2.Vibration Frequency range0.1 hz to 1 kHz
3.Vibration amplitude Range±2 µm to ± 5 mm from center
4.Start of measuring range195 mm
5.Standoff distance200 mm
6.End of measuring range205 mm
7.Max. Linearity error2.5 % of measured value
8.Resolution1µm
9.Output voltage± 5 V
10.Light sourceDiode Laser
11.Laser power/wavelength< 5 mW/ 670 nm
12.Laser safety classClass 2
13.Spot diameter at target< 1 mm
14.User Interface(i) Sensor interfaced to PC through ADC card
(ii) GUI developed in C++ language on PC for display of vibration frequency plot and amplitude values.
15.Dimension (mm)280 x 270 x 85
16.Power supply230VAC, 1 watt

 

 

 

 

 

 

 

 

 




FACILITIES AND MANPOWER REQUIRED FOR COMMERCIAL PRODUCTION

  1. A good mechanical workshop with facility of milling, drilling, bending for fabrication of various mounts and chassis of the instrument.
  2. Electronic soldering, assembling and testing facility.
  3. Personal computer.
  4. Optical bench, height corrections rod and its mount for optical alignment and cleaning kit for the optical components like thin tissue paper, Acetone, etc.
  5. Safety goggles for Laser.
  6. An experienced Electronic Engineer/Diploma holder for card testing and trouble shooting and an Electronic technician for assembly of electronic cards.
  7. An mechanical diploma Engineer for fabrication, assembly and alignment of opto-mechanical assembly.
SR NO. COUNTRY NAME PATENT NUMBER
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SR NO. NAME STANDARD NUMBER LOGO
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General License Fee : ₹ 222,700.00 (Two Lakh Twenty Two Thousand Seven Hundred)

General Royalty : 0%