accelerometer measurement Articles

  • Brüel & Kjær’s radiation-resistant accelerometers

    Carrying out vibration measurements in harsh industrial environments is much easier for engineers with Brüel & Kjær’s new Type 8347-C Accelerometer. The Type 8347-C accelerometer can withstand temperatures ranging from -196°C (-321°F) to +482°C (+900°F) and has high resistance to radiation. The shear design ensures the accelerometer  superior thermal ...

  • Brüel & Kjær accelerometers - 65 years of excellence

    The Thirties Already before the two young engineers Per V. Brüel and Viggo Kjær graduated as Masters of Electrical Engineering in 1939, they had decided to start a company together. However, they felt it was necessary to learn more and get some practical experience before actually going ahead, so P.V. Brüel became assistant to professor P.O. Pedersen in the newly created ...

  • Airbus Helicopters: Monitoring gearboxes with HUMS accelerometers case study

    Airbus Helicopters needed highly robust, flight-certified accelerometers for permanent monitoring of gearboxes to be quickly designed and delivered. Challenge For helicopters, one of the most dangerous possible scenarios – worse than engine failure – is gearbox failure. Quality vibration monitoring is needed to ensure gearbox health and predict failures, while absolute ...

  • Calibration – the sure way to accurate measurements

    Calibration   During testing, microphones and accelerometers can change sensitivity or break. They might look intact, but what happens if you continue measuring without having calibrated your transducer? Can you trust your data? Do you have to redo the entire test? In cases of extreme testing you might only have one shot at getting your measurement right as the product gets ...

  • HAV mis-measurement – to no standards whatsoever…

    Misunderstanding Hand Arm Vibration monitoring marketing material can put hands and safety policies at risk. Caveat emptor. We are regularly asked about new vibration measurement technology, particularly re the latest hand-held, glove or wrist mounted transducers that are presented as the latest assessment improvements. Whilst they may be useful tools, unfortunately some claims have been ...

  • Distributed Measurements Unlock the Future of Design

    The next generations of materials and design will require sensing technologies that can monitor beyond the scope of point sensors such as thermocouples and strain gauges. New sensing platforms based on optical fibers can obtain spatially continuous, real time data, giving developers detailed insight across broad areas into how their materials and designs behave. Such systems also can sense ...


    By Sensuron

  • Research of reliability for measuring high-g micro array acceleration sensor

    High-g is an acceleration value larger than 105 g. For the requirements of detecting high-g, people pay more and more attention to the reliability of an accelerometer. In this paper, the design and manufacture of high-g micro array acceleration sensor are researched to improve the reliability of the accelerometer. Owing to the superiority of MEMS manufacturing, in one processing, multiple ...


    By Inderscience Publishers

  • An Inertial Measurement Unit Application for a GPR Tracking and Positioning

    Abstract Abilities of an inertial measurement unit (IMU) for ground penetrating radar (GPR) tracking and positioning are presented at this paper. The IMU operation principle is based on calculating of the device's orientation in space via measurement of linear accelerations and angular velocities. Features of the IMU, GPS and wheel odometer are compared. Principal scheme of the IMU consisted ...


    By Transient Technologies LLC

  • How to ensure successful acceleration enveloping

    Following the interest shown in our recent blog discussing acceleration enveloping, the sophisticated signal processing technique that helps to pinpoint bearing failure at an early stage, we thought it would be a good idea to explain how to successfully implement it. ...


    By Hansford Sensors

  • Successful trunk main correlations in Australia, the land of long pipes - Case study

    The Aquasscan TM Successfully locates leaks at distances over 1KM in Sydney. The Gutermann Aquascan (Trunk Main) correlator provided a series of high performance correlations in trials performed in Sydney, Australia.  Sydney Water provided a 1.2 KM of 600mm OD Steel trunk main for a series of tests to be performed to evaluate the performance.  The testing was administered by ...


    By Gutermann AG

  • Keeping quiet about DCNS

    DCNS, one of Europe’s leading naval defence groups and contractor for integrated warships and systems, is a dedicated user of Brüel & Kjær sound and vibration solutions. This article, written with the support of DCNS, illustrate show PULSE™ is playing a central role at key DCNS operation centres in Northern France; helping with design, maintenance, acceptance testing ...

  • Crack identification in a cantilever beam using rotational laser vibrometer–based coupled of bending, axial and torsional vibrations

    In this paper, coupled response measurements are suggested for detection of a transverse surface crack in a cantilever beam. The crack has been modelled by a local compliance matrix of six degrees of freedom and simulated for detection. The eigenfrequencies are obtained using finite element method (FEM) and are compared with those of experiments. However, the small changes in eigenfrequencies are ...


    By Inderscience Publishers

  • Firmness evaluation of melon using its vibration characteristic and finite element analysis

    Analysis of the vibration responses of a fruit has been suggested as a non-destructive measure of its elastic properties (firmness). In this study, 'Huang gua' melons were excited using three types of balls (wooden, steel and rubber) and the vibration was detected by an accelerometer. The modulus of elasticity of the inner, middle and outer portions of melon flesh were determined using flat plate ...


    By Inderscience Publishers

  • GSM-enabled remote monitoring of rural handpumps: a proof-of-concept study

    The continued expansion of mobile network coverage in rural Africa provides an opportunity for simple and low-cost hydroinformatic innovations to measure and transmit data on handpump use for policy and management improvements. We design, build and test a Waterpoint Data Transmitter to determine its robustness, functionality and scalability. Results demonstrate that this novel application using ...


    By IWA Publishing

  • Transducers – “A lifetime of quality”

    At Brüel & Kjær, transducers are a core part of our business. They have been for more than50 years – almost a lifetime! The quality of our transducers is world-renowned. It is the result of our unique experience and knowledge, backed up by meticulous testing and quality control. Experience, Knowledge and Innovation Our experience and knowledge, acquired over ...

  • Dynamic Behavior of the Bumpy Road Shaking Table System

    Vibration tests were performed on the “bumpy road shaking table” system at the Cambridge University Geotechnical Centrifuge to investigate its dynamic behavior under operating conditions. In these tests, steel plates of known weights were fastened onto the base of the model container. The container was then subjected to “earthquake motions” simulated by the shaking table system and the ...


    By ASTM International

  • Opening the envelope on bearing vibration

    A sophisticated signal processing technique can help to pinpoint bearing failure at an early stage. Chris Hansford, Managing Director at Hansford Sensors, explains. Experienced operators can often tell if a machine is not working properly, on the basis that is does not ‘sound right’. The same principle can be applied – using modern electronics – to identify the exact cause ...


    By Hansford Sensors

  • Good looks Are not enough

    With its stringent exterior and interior noise testing programs, the FIAT Group gains competitive advantages in a market where customer satisfaction is the key to success. For its wind tunnel test programs, Brüel & Kjær is FIAT's preferred supplier covering the whole measurement chain – from microphones and accelerometers to the most advanced noisemapping solutions. The FIAT ...

  • Should Your Sensor Have A Connector Or Pin Terminals?

    When it comes to measuring the activity of your project, it’s nice to have options. High precision sensors can offer plenty of selections from the range of your measurements to the output of your readings, but a sensor is only as good at its connection. Connectors and pin terminals are common and dependable connections that relay your readings from within the sensor to the screen in front ...


    By Jewell Instruments LLC

  • PULSE makes explosive readings

    About Kockums AB The Danes haven’t always been on the best of terms with their neighbours in Sweden! The late1600s were troubled times in the Baltic. Having conquered the provinces of Skåne, Blekinge and Halland from Denmark, the then Swedish King Karl XI realised that he needed a naval base in the south of Sweden to defend these new acquisitions. Therefore, Karlskrona was ...

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