Load Cell Support and Ratiometric Sensors

A new and powerful addition to Crystal Instruments EDM software is enhanced support for load cells and other ratiometric sensors. The sensitivities of these sensors are dependent on the supplied excitation voltage, so it is crucial to provide precise excitation. Crystal Instruments’ latest software release of EDM 9.0 provides an effortless process to configure and setup load cells and other ratiometric sensors.

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Earthquake Testing on a Three-Axis Shaker System

Earthquake testing is a crucial process that is used to determine the seismic performance of a structure. The utilization of a physical testing method helps users better understand the complexity involved in earthquake forces. A shaker table is typically used to execute a physical method of testing. The results from earthquake testing are used to optimize the design and material properties of the unit under test.

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Introducing Shaped Random and Burst Random Output Excitation in MIMO FRF Modal Analysis

Modal testing and analysis are important processes that improve the design of a product. Therefore, it is crucial to ensure testing is carried out with optimal settings. The Shaped Random and Burst Shaped Random output excitation introduced by Crystal Instruments provides unique advantages such as a better estimation of the quality factor, damping and FRF amplitude. This indicates that the obtained modal parameters are more accurate. A modal test is carried out to examine the data to see the improvement in the results with these newly introduced techniques when compared to the conventional shaker excitation signals. The green curve shows the FRF obtained using the Shaped Random excitation and the blue curve shows the FRF obtained using the white noise excitation. As illustrated, the advantages of shaped peaks using the newly introduced approach leads to more accurate estimations of the quality factor, damping and FRF amplitude as discussed in the forthcoming sections.

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New Ultra-compact Spider-20H, Spider-20HE, & Spider-20i with 256 kHz Sampling Rate

Featuring the highest sampling rate provided in the industry at 256 kHz. Handheld battery powered system with wired & wireless network options and 20V input range. Sync between multiple devices. Choose the convenient portable model or industrial model for permanent mounting.

The Spider-20H, Spider-20HE, and Spider-20i received a hardware upgrade to support an impressive 256 kHz samping rate on all 4 input channels. It is the highest sampling rate offered in the market of compact analyzers. The high sampling rate is especially beneficial for measuring high orders and transient capture in blast tests, pyroshock events, drop shock tests, crash tests, etc.

In addition to the high samping rate, the input range is expanded to 20V to capture larger signals.

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Spiders with 256 kHz Sampling Rate

Crystal Instruments EDM 9.0 release introduces new additions to the Spider product line featuring support for sampling rates up to 256 kHz.

The new Spider-80Hi and Spider-80Ci are scalable versions of the Spider system featuring the impressive new 256 kHz sampling rate. Recording can also be performed at sampling rates up to 256 kHz for all input channels, up to 512 channels per Spider system.

The compact, ultra-portable four channel version of the Spider has also been developed to support a 256 kHz sampling rate. Currently, three variations of the compact Spiders supporting the 256 kHz sampling rate are available: Spider-20H, Spider-20HE, Spider-20i.

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EDM 9.0 Release

Crystal Instruments is pleased to announce our EDM 9.0 release, the most powerful and feature rich version of EDM software.

EDM 9.0 release supports the newly introduced hardware units (Spider-80Hi, Spider-80Ci, Spider-20i, Spider-20H, Spider-20HE) that support data acquisition and recording for up to 256 kHz.

In addition, the proprietary Multi-Resolution technology has been extended to benefit frequently used Vibration Control tests for Single-axis and MIMO tests. Several feature enhancements and bug fixes resulted in this more intuitive and user-friendly version.

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Modal Analysis of the Human Skull

Researchers at North Dakota State University have made great headway in understanding the behavior of the human skull under different strain rates. The study they carried out utilized a combination of computational and experimental modal analysis to compare the accuracy of different techniques used to model a human skull, and ultimately could increase the accuracy of dynamic simulations on the skull.

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Comparison of Multi-Resolution Spectrum Technology and Regular FFT in Modal Analysis

Modal testing and analysis are crucial processes in the product development cycle. Sometimes the testing results are wrong by several magnitudes, especially in the low frequency bands where the frequency resolution is not sufficient. Crystal Instruments’ patented Multi-Resolution (MR) Spectrum technology helps overcome this issue with a unique solution.

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