Ultrasonic vibration measurement system
OPVIB is vibrometer used to study vibrations occurring in many areas of life - in the diagnosis of drives of machinery or measurements of vibration impacting on humans and the vibration, the source of which is a man.
The device provides a non-contact vibration measurement that does not affect at the tested object.
The instrument is used in the research of components of engines , pumps, gears, bearings, fans and other rotating machinery.
Advanced software of vibrometer enables a quick and convenient signal processing.
OPVibr was created to measure vibration – its frequency and amplitude. The device generates continuous wave with constant amplitude and frequency on analyzed, vibrating surface using piezoelectric transducer. Reflected wave has modulated frequency and phase – deviation of frequency and phase contains information about movement of analyzed object. This signal is received by another, isolated transducer and then, OPVibr amplifies and demodulates it.
There are two ways of wave modulation:- Doppler effect: When acoustic wave (carrier) approaches to the vibrating element, it can be perceived like harmonically moving sound source.
- Periodic changes of signal phase induced by position change of reflecting surface.
Demodulation is based on comparison of generated and received waves. Identical center-frequency of wave is achieved by using same, stable time base. It also makes measurement precision independent from absolute value of frequency – only jitter is significant.
The frequency range of transmitted wave: 30kHz-800kHz
The amplitude of the transmitted wave: max. 70Vpp
Output voltage range: 0-5V
The frequency range of vibration: 1Hz - 30kHz
The minimum measurable amplitude of the vibration: <1μm pp
Power supply 12VDC, 0.5A
In current version of system, oscilloscope USB PICOSCOPE 2204A-D2 produced by Pico Technology was used. It has two input channels and signal generator.
Crucial parameters of this oscilloscope are (recommended values are listed in brackets)- Analog bandwidth 10MHz (>50kHz)
Detailed information about to oscilloscope and its' software can be found on producers' web site: Pico technology. Producer provides controlling software for PC with oscilloscope.
- Output of continuous wave transmitter,
- Output of demodulated signal,
- Input of receiver transducer,
- Input for external clock (optional)
Additionally, our device is equipped with high-voltage converter – the circuit requires only one supply voltage. OPVibr also has built-in quartz based clock, which guarantees stable time base.
Copyright © 1989 - 2016 Optel. All rights reserved.
Limited, registered in the Companies Register by the regional court Wroclaw Fabryczna, VI Industrial Section of KRS, under the number 0000124439,
NIP: PL 8981047033, REGON 008375538, operating capital 364,500 PLN