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Tip of the Month:
How to Properly
Wind Cables
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Cables have a shielding that is usually a mesh screen to protect from interference. If you're constantly introducing twists, you begin to wear down this shield that works to prevent electrical interference from entering your signal path. Once you've destroyed the shield it can't be fixed and you need to replace the cable.
Watch This Video Showing How to Properly Wind a Cable
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Technical Exchanges
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May 14 at The Modal Shop
Cincinnati, OH
May 20-21 Seattle, WA By Pat Walter at PCB May 20-22 Buffalo, NY
By Bob Metz at PCB
June 18
Buffalo, NY
June 24-26
Chicago, IL
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Quick Links
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ISO TC 108 - Mechanical vibration, shock and condition monitoring
ISO TC 108/SC 3 - Use and calibration of vibration and shock measuring instruments
SAVE (Formerly SAVIAC)
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Previous Newsletters
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USB Smart Sensor for Vibration; University of North Dakota Uses Shaker in Unmanned Aerial Vehicle Testing
Why is it Important to Calibrate my Microphones?; KU Leuven Designs Impedance Tube Alternative
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Select Newsletter Articles
by Topic
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Your Feedback on Digital Smart Sensing
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 Thank you to the many readers who responded to last month's request for input on the concept of digital accelerometers. We were flooded with input and suggestions for dozens of single channel applications. Among these were: field measurements; bearing/machine health monitoring; dynamic product in-line quality control; human vibration factors; medical implantation (joint) surgical feedback; and civil infrastructure monitoring. By far, the most common thread was...
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Ohio University Uses Shaker on Humans in
Bone Density Testing
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 Ohio University's Department of Biological Sciences is using an electrodynamic shaker on human beings. Lyn Bowman, Research Assistant Professor under Professor of Biological Sciences Anne Loucks, explains that his department is using the shaker for Mechanical Response Tissue Analysis (MRTA), a method for measuring bone strength in humans. His research group is focusing on the ulna, the long bone on the little finger side of the forearm. In MRTA data collection, bones are oriented...
modalshop.com/calibration.asp?ID=945
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Blast from the Past:
Statistical Methods of Calibrating Uncertainty
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 In order to properly evaluate an uncertainty contributor by a statistical method, any variables related to the contributor must be allowed to change. Random uncertainty contributors are often the easiest to quantify using a statistical method because the only variable is time. Making repeated measurements of the same sensor and determining the standard deviation of the results of these measurements allows time to vary and the results to conform to a Normal (or Guassian) Distribution Model. Another contributor that can be evaluated statistically is... modalshop.com/calibration.asp?ID=222
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Thanks for joining us for another issue of "Dynamic Sensors & Calibration Tips." As always, please speak up and let us know what you like. We appreciate all feedback: positive, critical or otherwise. Take care!
Sincerely,
 Michael J. Lally A PCB Group Company |
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