lang="en-US"UTF-8 Prosig Support Blog - Page 4 of 11 - The place to come for support for Prosig's DATS, P8000 & PROTOR products class="home blog paged custom-background paged-4 custom-background-image group-blog blogolife-3_0_7 unknown"

Prosig Support Blog

The place to come for support for Prosig's DATS, P8000 & PROTOR products

Prosig Support Blog
3385class="post-3385 post type-post status-publish format-standard hentry category-tutorial tag-accelerometer tag-accelerometers tag-bridge tag-charge tag-dc tag-high-pass-filter tag-iepe tag-wheatstone-bridge"

What Type of Accelerometer Should I Use? IEPE, Charge or Bridge-based?

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What type of accelerometer should I use? What are the advantages/disadvantages of a charge mode accelerometer, an IEPE accelerometer and a bridge based accelerometer?

There are so many types of accelerometer that is often difficult to know what type of accelerometer to use. An IEPE accelerometer will have a high pass filter at about 5Hz. The charge type will, by it’s nature have what is effectively a high pass filter at about 0.1Hz. Therefore neither type will show DC levels. The charge type will usually have a lower frequency bandwidth than the IEPE type. Charge accelerometers can be used at higher temperatures however. Continue reading What Type of Accelerometer Should I Use? IEPE, Charge or Bridge-based?

James WrenAdd a Comment3381class="post-3381 post type-post status-publish format-video hentry category-p8000 category-tutorial category-video tag-acoustic tag-data-acquisition tag-data-capture tag-noise tag-p8000 tag-scheduler tag-scheduling tag-sound tag-vibration post_format-post-format-video"

How to set up scheduled data captures

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A video that explains how to set up the DATS Data Acquisition software to perform captures at specific, scheduled times.

Justin FosterAdd a Comment3367class="post-3367 post type-post status-publish format-video hentry category-tutorial category-video tag-hammer-impact tag-modal-analysis tag-noise tag-ods tag-operational-deflection-shapes tag-running-modes tag-software tag-vibration post_format-post-format-video"

[Video] Create AVI files from your structural animations

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The DATS Modal Analysis software consists of Hammer Impact Testing, Modal Analysis & Structural Animation (often referred to as Operational Deflection Shapes or ODS and Running Modes). Having measured and analysed your data the Structural Animation software allows you to visualisation your structure under certain operating conditions. These visualisations can then be saved as AVI files. This video shows you how…

James WrenAdd a Comment3277class="post-3277 post type-post status-publish format-standard hentry category-dats category-signal-processing category-tutorial tag-background-noise tag-gaussian tag-measure tag-measurement tag-noise tag-random tag-sine-wave tag-spectra tag-spectrum tag-spectrum-level tag-vibration"

Relative signal levels of a sinusoid with and without background noise

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In the process of looking at some order data, a question about the accuracy of the measurement of the signal level of discrete frequency signals which were close to the general noise level.  To answer this question, a small DATS worksheet was created which generated 2 signals.  The first signal was a 35 Hz sinusoid which, by itself the spectrum level was measured to be approximately -9 dB (ref 1 V) as seen in Figure 1.

Spectrum level of 35Hz sinusoid
Fig 1: Spectrum level of 35Hz sinusoid

Continue reading Relative signal levels of a sinusoid with and without background noise

John MatheyAdd a Comment3330class="post-3330 post type-post status-publish format-standard hentry category-dats category-p8000 category-tutorial tag-acquisition tag-calculated-channel tag-data-acquisition tag-data-capture tag-dats tag-hardware tag-non-linear tag-p8000 tag-polynomial tag-software tag-thermocouple"

Creating calculated signals with DATS Acquisition

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Case Study: What can I do if the transducer I am using has a non-linear sensitivity over its measuring range?

Abstract

Recently a PROSIG user wanted to measure a specific temperature parameter on a running engine. The transducer being used was one of the engine sensors built into the engine operating system to minimize engine emissions and maximize fuel economy. Unfortunately, the sensitivity of this transducer was not constant over the desired temperature range. The question then became, how can the output from this non-linear transducer be used to accurately measure the desired temperature parameter? Continue reading Creating calculated signals with DATS Acquisition

John MatheyAdd a Comment3100class="post-3100 post type-post status-publish format-standard hentry category-p8000 category-signal-processing tag-angle-domain tag-encoder tag-order-domain tag-order-plot tag-orders tag-pulses tag-pulses-per-rev tag-revolutions tag-shaft tag-synchronous"

How Many Samples Per Revolution Are Required To Study A Particular Order

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When working in the synchronous/angle domain, how many samples per revolution are required to study a particular order.

To study the nth order we need 2*n samples per revolution. Continue reading How Many Samples Per Revolution Are Required To Study A Particular Order

James WrenAdd a Comment3320class="post-3320 post type-post status-publish format-video hentry category-tutorial category-video tag-dats tag-noise tag-order-tracking tag-rotating-machinery tag-rotational-speed tag-speed-signals tag-tacho tag-tacho-signal tag-tachometer tag-vibration tag-vibration-data tag-vibration-signals tag-video tag-waterfall-plot post_format-post-format-video"

[Video] Creating speed signals for data with no tacho

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So you’ve got some noise and/or vibration data from a rotating machine, but no speed information. Surely that means you can’t analyse against speed or do any order analysis, right? Well, not quite!

The DATS Rotating Machinery option now comes with a tool to create speed v time data using your noise or vibration signals.

Watch the video to find out how…

 

Chris MasonAdd a Comment3311class="post-3311 post type-post status-publish format-standard hentry category-dats category-p8000 tag-eddy-current-probe tag-electrical-runout tag-lvdt tag-measurement tag-proximity-probe tag-rotor-runout tag-runout tag-total-runout tag-turbine"

What sensors are required to perform a Rotor Runout Measurement?

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The DATS Rotor Runout Measurement package can be used on any shaft where the following probes are available…

  1. A LVDT (Linear Variable Differential Transformer) probe. This is basically a contact probe. This will allow the measurement of the shaft total runout*.
  2. If an electrical runout measurement is also required then an additional eddy current probe (also known as a proximity probe) is needed. This is a non contact probe and can be used in conjunction with the LVDT to measure the electrical runout only.
  3. A once per revolution tachometer is also required. This could be optical, proximity, magnetic and so on.

With these three sensors it is possible using the DATS Rotor Runout Measurement package to find both electrical and mechanical runout.

* Total runout is a composite tolerance including the effects of cylindricity and concentricity, co-axiality, straightness and parallelism along the axis.

James WrenAdd a Comment3305class="post-3305 post type-post status-publish format-video hentry category-dats category-tutorial category-video tag-acoustics tag-analysis tag-cursors tag-measurement tag-noise tag-sound tag-vibration tag-video post_format-post-format-video"

[Video] Using reference cursors to measure data

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A tutorial by James Wren (Prosig UK) on how to use the reference cursors in the DATS software to precisely measure features in your data.

James WrenAdd a Comment3294class="post-3294 post type-post status-publish format-standard hentry category-signal-processing category-tutorial tag-acceleration tag-accelerometer tag-accelerometers tag-acquisition tag-hammer-impact tag-hammer-impact-test tag-hammer-test tag-inlet-manifold tag-manifold tag-resonance tag-resonant tag-rotating-machinery tag-rotation-speed"

How do I find the natural frequency of an inlet manifold?

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There are a number of ways to find the natural frequency (resonance) of a part like an automotive inlet manifold. Here are three different types of popular test technique. But which one should you use and why? Continue reading How do I find the natural frequency of an inlet manifold?

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