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Accelerometer Noise

From Wilcoxon Research
 

 

The various noise sources of piezoelectric transducers connected to preamplifiers are discussed. Low level, low frequency measurements are limited by the electromechanical efficiency of the piezoelectric material used in the accelerometer and the characteristics of the preamplifier.

Noise, in general, is any undesired signal. Here, noise is limited to that generated by the electrical components of an accelerometer preamplifier which degrades accelerometer performance. The figure below shows the input stage of a typical preamplifier for a piezoelectric accelerometer operating as a voltage or charge amplifier.

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Vibration sensors cover sensors and other instruments used for measuring vibration and acceleration. Search by Specification | Learn more about Vibration Sensors
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Vibration instruments are used for measuring, displaying and analyzing vibration. Typically these instruments comprise a transducer, data acquisition and either a local display or some sort of output to a computer or another instrument. Search by Specification | Learn more about Vibration Instruments
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Topics of Interest
This paper is written as an overview on low-noise piezoelectric accelerometers and will review when and where low-noise devices are needed as well as the engineering tradeoffs made during the design... (Read More)
Then at the balance let s be mute, We never can adjust it; What s done we partly may compute, But know not what s resisted (John Burns) 15.1 Preamplifiers 15.1.1 Underlying Principles... (Read More)
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