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NEW PRODUCT NEWS—edited by Harv Weiner

Digital Laser Doppler Vibrometer

Polytec PI, Inc. has announced the VDD-650-DA and VDD-660-DA digital vibrometers for high-precision measurement, display, and processing of vibration data. Conventional laser vibrometers use analog electronics to demodulate Doppler-shifted light that is backscattered and detected from a vibrating surface. The new Digital Vibrometers use the latest digital signal acquisition and processing technologies to achieve exceptional displacement accuracy and resolution (down to 1 pm, high linearity and low harmonic distortion over a wide vibration frequency range–DC to 2 MHz.)

VDD-650-DA and VDD-660-DA are used in conjunction with almost any of Polytecýs optical sensor heads. The Digital Vibrometer includes a signal acquisition board for PC-based processing of the Doppler signal plus Vibsoft software running under Windows NT for display/processing of frequency domain and time domain vibration data.

VDD-660-DA is designed for existing Polytec vibrometer customers who wish to upgrade and use their existing QFV-3001 controller electronics in addition to the sensor head. VDD-650-DA includes a front-end preprocessor that does not require the controller.

Typical applications for the Digital Vibrometer include any situation where the finest vibration resolution and accuracy is required such as calibration of accelerometers, shakers, hydrophones, sonic and ultrasonic transducers, measurements on data storage components (hard drive, CD, DVD), micro-machines, piezo transducers, and non-repetitive runout of precision spindles.

Polytec PI, Inc.
(508) 832-3456
Fax: (508) 850-1835
www.polytecpi.com

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