Strain Gauge Basics – Part 2 – Shunt Calibration

As mentioned in the previous post, in order to relate the measured voltage difference across the bridge circuit to a strain measurement, we need a way of calibrating the system. In most systems, including the Prosig acquisition systems, this is done by including a high-precision shunt resistor across one of the legs in the bridge. For example, the following diagram shows a quarter-bridge circuit with a shunt calibration resistor, RS, across the bridge completion resistor R2.

Bearing & Gearbox Vibration Analysis Using Demodulation Techniques (Part 1)

Bearings and gearbox vibration are fundamental issues for rotating machines in many industrial applications. These are critical components; any failure can prove expensive in repair costs and downtime. Because of…

Strain Gauge Basics – Part 1

The use of strain gauges with Prosig’s data acquisition systems is well understood and has been used in many real-world applications over the years [see What Is A Strain Gauge?…

Data Smoothing : RC Filtering And Exponential Averaging

What are RC Filtering and Exponential Averaging and how do they differ? The answer to the second part of the question is that they are the same process! If one…

What Are dB, Noise Floor & Dynamic Range?

We are often asked what noise floor & dynamic range actually are. Most engineers are probably familiar with or have come across the decibel or dB as a unit of…

Rotating Machinery Vibration Analysis: Keeping Your Machines Humming Along

[An Introduction To Vibration Analysis – Part 5] Welcome to Part 5 of our ongoing introduction to the world of vibration and acoustic measurement and analysis. Here, we look specifically…

Vibration Control and Isolation: A Comprehensive Guide for Engineers

[An Introduction To Vibration Analysis – Part 4] Welcome to the fourth part of our ongoing introduction to the world of vibration and acoustic measurement and analysis. In this post,…

Modal Analysis in the Real World

[An Introduction To Vibration Analysis - Part 3] Modal analysis is one of the most widely adopted vibration measurement techniques for studying the dynamic behaviour of structures and mechanical components.…

The Spectrum of Coloured Noise: Beyond White and Pink – Applications and Historical Context

Introduction The auditory world around us is filled with various types of noise, and while some are simply distracting or annoying, others serve practical purposes. You're probably familiar with the…

Vibration Measurement Techniques: A Comprehensive Guide

[An Introduction To Vibration Analysis - Part 2] Introduction This post on vibration measurement techniques is the second in our series, introducing vibration analysis. Future posts will continue the exploration…

On The Shoulders of Giants – Joseph Fourier: The Mathematical Maestro of Vibration and Acoustics

The following post on Joseph Fourier is our second in the On The Shoulders of Giants series. It is hard to overstate Joseph Fourier's importance in the field of sound…

Basics of Vibration Analysis: A Technical Dive

[An Introduction To Vibration Analysis - Part 1] Introduction For professionals delving into the worlds of automotive, aerospace, or industrial engineering, vibrations are not just mere oscillations; they're a symphony…

How To Analyze Noise & Vibration In Rotating Machines

This article will look at the basic steps needed to measure noise & vibration in rotating machines. We won’t look in great detail at some of the techniques involved – we deal with these elsewhere on the blog. This material is suitable for a newcomer to the field who understands the basic concepts of noise & vibration analysis but has not dealt with rotating machinery before.

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Measure Vibration – Should we use Acceleration, Velocity or Displacement?

When using vibration data, especially in conjunction with modelling systems, the measured data is often needed as an acceleration, as a velocity and as a displacement. Sometimes different analysis groups require the measured signals in a different form. Clearly, it is impractical to measure all three at once even if we could. Physically it is nigh on impossible to put three different types of transducer in the same place.

On The Shoulders Of Giants – The Life and Legacy of Claude Shannon: Father of the Information Age

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• Post category:biography

This piece on Claude Shannon is the first in what will become a series of posts looking at the key figures who shaped the thoughts, theories, algorithms and technologies that…

Impact Hammer Double Hit – An Investigation

An Impact Hammer double hit is viewed as a common problem, and most hammer impact testing software offers a "Double hit" rejection function. Signals captured with double impacts are not…

Understanding CAN Bus: The Nervous System of a Modern Vehicle

Understanding CAN bus (Controller Area Network Bus) is essential to modern automotive engineering. The CAN bus, and its variants, are now universal across the automotive industry and beyond. On many…

Electric Vehicles – Vibration & Acoustic Testing

Electric vehicle noise & vibration testing is crucial for vehicle development, ensuring the final product’s comfort, safety, and reliability. While electric vehicles (EVs) and internal combustion engine (ICE) vehicles undergo…

A Guide To Resonance

Welcome to our latest blog post, where we delve into the fascinating world of resonance and natural frequency! Over the years, we've consistently noticed that our articles exploring these topics…

Tools for motorcycle dynamics analysis

Tools for motorcycle dynamics analysis - Prosig DATS and Structural Animation Viewer Mechanical engineering covers a vast field of topics, but not many fields feature higher dynamics in time and…

Some Basic Vibration Signal Qualities

This article discusses quantifying basic vibration signals from three aspects: signal type, signal level, and signal display format. Mathematical expressions and typical applications are also introduced. A simple harmonic vibration…

Fig1: Basic Workflow

Automated data capture, analysis and reporting

This post deals with automated data capture and analysis of data. It uses Prosig's DATS software and the worksheet environment it provides. The technique could be duplicated in other software…

Are My Hammer Impact Results Valid? (3) Time Invariance

As mentioned in our previous two articles, when performing experimental modal testing of a structure or component using impact (or ping) testing, it is important to consider and verify the…

Accelerometer Selection – How To Choose An Accelerometer

Since DJB joined Condition Monitoring Technology Group (CMTG) in 2021 we have been able to bring new knowledge and capability to the group, especially when working alongside Prosig. We have…