Test 2017 Japan (Japan Testing Technology Show)

Crystal Instruments and Sentek Dynamics partnered together in Tokyo, Japan at the Test 2017 show on September 13 - 15, 2017.

Crystal Instruments featured innovative new testing solutions:

  • EDM Modal - Complete Modal Testing & Analysis Software Suite
  • CoCo-80X - Handheld Touchscreen Dynamic Signal Analyzer
  • Spider-80Xi - Compact & Modular Dynamic Measurement System (scales up to 512 channels)

Sentek Dynamics offered turn-key solutions and environmental testing systems:

  • Electrodynamic Shakers - Low, medium, high, and extra high force shakers available. Three axis, permanent magnet, long stroke, and high performance shakers also available.
  • THV Environmental Test Systems - combines three testing environments (temperature, humidity and vibration) in one chamber.
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Streamlined & Efficient Process of Viewing Signals Acquired in Vibration Tests

Engineering Data Management (EDM) is the software platform supporting all Crystal Instruments products. It is the center of testing and data management for carrying out daily operations. Crystal Instruments is expending relentless efforts to provide the best user experience possible.

Test configurations always involve a large quantity of parameters to setup. In addition, many signals and run logs are saved after each test run. To organize such a large quantity of information and to increase efficiency in the process, EDM is powered by a database structure supporting all types of libraries. EDM software keeps run histories of all tests, which can be searched in a single list. Signals are easily reviewed and compared.

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Crystal Instruments Data Transfer Tool

Crystal instruments created the Data Transfer Tool to provide an easy method for transferring data between different PCs or databases. This standalone tool greatly simplifies the entire process by guiding the user through a simple interface. The setup wizard also provides an intuitive interface for monitoring the transfer process.

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Automotive Testing Show and Expo 2017 - England

The iconic London taxi; have you ever wondered where and how it was built? Just a hop, skip and three train rides away from London is the town of Coventry, a metropolitan borough in the West Midlands of England. Motor companies from Coventry have made significant contributions to the British auto industry since 1896. It was the home of companies like Rover, a direct ancestor of present day Land Rover and Jaguar. Triumph and Daimler motorcycles are included as well. The modest yet distinct black taxi cab manufactured by LTI in Coventry is a historic engineering marvel featured in trendy and contemporary London, charming locals and tourists alike.

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Applications of Experimental Modal Analysis

Experimental Modal Analysis (EMA) has developed into a major technology for studying structural dynamics in the past several decades. Through Experimental Modal Analysis, complex structure phenomena in structural dynamics can be represented using decoupled modes consisting of natural frequency, damping, and mode shapes. The collection of these modal parameters is referred to as Modal Model. Experimental Modal Analysis is commonly referred to as Modal Analysis.

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Importance of Spectrum History Signals in a Sine Test

Sine tests are performed on a variety of modes to test the DUT. In a Swept Sine test, the DUT is subject to a range of frequencies, one frequency at a time. The response obtained is filtered using a tracking filter centered on the frequency of interest.

Once a transfer function is obtained, it is easy to identify the resonance and anti-resonant frequencies of the DUT. For fatigue testing, a Sine test is typically run in a different mode known as a Dwell Sine where the DUT is subject to its resonant frequency until the DUT experiences fatigue. While the DUT is being driven at their resonant frequencies, the resonant frequency of the DUT tends to shift. Due to this phenomenon, yet another variation of Sine test, RTD (Resonance Track and Dwell) is used. In this mode, the resonance frequency of the DUT is continuously checked using the Amplitude or Phase of the response. Through mathematical calculations, a change in the resonant frequency along with the direction of change is determined. The drive output frequency is then modified instantaneously to drive the DUT at its resonant frequency at all times.

The fatigue testing can last anywhere from a few minutes to several hours. The instantaneous display of the time or frequency signals would be less useful under such test conditions and a synopsis of the entire test duration would be most helpful to draw testing conclusions on the DUT.

Crystal Instruments uses Spectrum history signals, a special type of signals plot to conveniently plot a user defined signal property vs. time or cycles on the X-axis. To ensure the best readability and analysis, the plot is enhanced to accommodate the entire test duration even when the test durations run into several days, weeks or months. With the PC memory as the limitation, test durations of several months or even years can be plotted and viewed simultaneously, thus eliminating any necessity to section the data plot.

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CoCo-80X: Designed for Usability

Today’s engineering tools are the result of constant software development, but these developments aren’t always best for the end-user. Engineers who are heavily invested in their tools will be reluctant to switch to a new device. In a time where software is constantly changing, people don’t have the time to struggle with new software interfaces. Especially field technicians, whose job is to collect and analyze data, don’t like wasting time getting used to a new software interface. Their job is already complicated, and is only made worse with a complicated measurement device. If their tools are too complicated to use, engineers will look for a simpler solution.

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