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	<title>PNNL Available Technologies - Ultrasonics</title>
<link>http://availabletechnologies.pnl.gov/</link>
<description>PNNL Available Technologies</description>
<language>en-us</language>
<docs>http://blogs.law.harvard.edu/tech/rss</docs>
<managingEditor>lisa.teske@pnl.gov</managingEditor>
<webMaster>cameron.bates@pnl.gov</webMaster>
<item><title><![CDATA[Ultrasonic Characterization of High Solid Content Suspensions]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=240</link><description><![CDATA[Suspensions or slurries having moderate and high particle concentrations are found in a variety of industries.]]></description><pubDate>Fri, 28 Mar 2008 11:13:02 GMT</pubDate></item><item><title><![CDATA[Fermentation Monitoring with Ultrasonic Backscattering ]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=224</link><description><![CDATA[In an experimental or production fermentation process, it is frequently necessary to monitor the growth of organisms within the fermentor.]]></description><pubDate>Thu, 15 Feb 2007 14:19:16 GMT</pubDate></item><item><title><![CDATA[Velocity Profile and Rheology of Flowing Fluids and Slurries]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=220</link><description><![CDATA[Rheological and physical property information on process stream conditions are critical when maintaining product quality and avoiding process upsets.]]></description><pubDate>Wed, 31 Jan 2007 14:29:26 GMT</pubDate></item><item><title><![CDATA[Ultrasonic Liquid Level Monitor]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=217</link><description><![CDATA[Researchers at PNNL have developed and validated a novel concept for an ultrasonic liquid level moni]]></description><pubDate>Thu, 25 Jan 2007 13:19:55 GMT</pubDate></item><item><title><![CDATA[Characterizing Fluids Using Ultrasonic Diffraction Grating Spectroscopy]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=209</link><description><![CDATA[There are a variety of techniques for measuring particle size of a slurry in the laboratory, but few methods to measure it on-line and in real time.&nbsp;The research using an ultrasonic diffraction grating illustrates the emergence of a new technique to measure particle size, and its development can lead to an instrument for process control or one for the laboratory.&nbsp;The diffraction grating was formed by machining triangular grooves about a half-millimeter apart on the flat surface of the unit, as shown in the photograph.&nbsp;The slurry is in direct contact with the grating surface.]]></description><pubDate>Fri, 05 Jan 2007 14:45:34 GMT</pubDate></item><item><title><![CDATA[Ultrasonic Characterization of Settling Suspensions]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=208</link><description><![CDATA[PNNL researchers have developed&nbsp;a sensor that can characterize a fiber suspension, which may be of particular interest to those in the papermaking industry.&nbsp;When refining wood&nbsp;pulp for paper, the mechanical action of the rotation and grooved circular refiner plates produce a pulp-fiber slurry.&nbsp;The image (see adjacent) shows the settling of two types of pulp:&nbsp;&nbsp;unrefined and refined.&nbsp;In the beginning, both are basically the same, but&nbsp;over time&nbsp;the refined sample does not settle as much as the unrefined sample.Our sensor monitors the settling process by putting a transducer on each side of the settling vessel.&nbsp;One transducer acts as a transmitter and other acts as a receiver.&nbsp;The signal in the receive transducer is affected by the pulp passing in front of it and essentially measures the pulp concentration.&nbsp;A peak in the signal occurs at a specific time, called the &quot;peak time.&quot; The results show that the peak time is dependent upon degree of refining, or the amount of time in the refiner.&nbsp;Consequently, the ultrasonic sensor can determine the degree of refining, making the refining process more efficient.]]></description><pubDate>Fri, 05 Jan 2007 14:34:15 GMT</pubDate></item><item><title><![CDATA[Non-Contact Sensor for Measuring the Density and Speed of Sound of a Liquid Contained in a Pipeline or Vessel]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=207</link><description><![CDATA[The need for a compact, non-invasive, real-time measurement of the density and speed of sound of a liquid led to the development of an ultrasonic sensing technique based upon the reflection of ultrasound at the solid-fluid interface, as shown in the schematic diagram.]]></description><pubDate>Fri, 05 Jan 2007 14:24:34 GMT</pubDate></item><item><title><![CDATA[Real-Time Fluid Viscometer in Contact With Fluid]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=206</link><description><![CDATA[The on-line measurement of the viscosity is accomplished by analyzing the multiple reflections of an ultrasonic wave within a quartz wedge, shown in the diagram.&nbsp; For on-line measurement, the base of the wedge forms part of the pipeline wall.]]></description><pubDate>Fri, 05 Jan 2007 14:06:29 GMT</pubDate></item><item><title><![CDATA[Small Particle Separation, Inspection and Transport System]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=199</link><description><![CDATA[PNNL researchers have developed a device and method for separating and transporting sub-millimeter size particles and providing various inspection means to rapidly characterize individual particles for quality control purposes.]]></description><pubDate>Sat, 16 Sep 2006 13:03:13 GMT</pubDate></item><item><title><![CDATA[System for Detecting the Presence of Foreign Material in Process Streams]]></title><link>http://availabletechnologies.pnl.gov/technology.asp?id=195</link><description><![CDATA[This patented inspection system and method uses ultrasound to non-invasively detect foreign objects in process streams.]]></description><pubDate>Thu, 14 Sep 2006 11:49:08 GMT</pubDate></item>  
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