Detecting the presence or absence of a liquid

An ultrasonic signal is passed through a pipe D in a liquid (e.g. beer) dispensing system to determine the presence or absence of liquid within the pipe according to the attenuation of the soundwaves. The attenuation level of the received ultrasonic signal is compared (at F) with a predetermined ref...

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1. Verfasser:	GEOFFREY GLASGOW
Format:	Patent
Sprache:	eng
Schlagworte:	MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS TESTING
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creator	GEOFFREY GLASGOW
description	An ultrasonic signal is passed through a pipe D in a liquid (e.g. beer) dispensing system to determine the presence or absence of liquid within the pipe according to the attenuation of the soundwaves. The attenuation level of the received ultrasonic signal is compared (at F) with a predetermined reference level, and if the attenuation is low a "no liquid" indication (at K) is provided.This indication signal can be used to shut down the pump in the dispensing system or to shut a valve to prevent drainage of the system. The indication signal may be temporarily delayed (at H) in order to obviate spurious operation of the "No liquid" detector to prevent it tripping when a gas or foam pocket passes through the ultrasonic beam.
format	Patent
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The attenuation level of the received ultrasonic signal is compared (at F) with a predetermined reference level, and if the attenuation is low a "no liquid" indication (at K) is provided.This indication signal can be used to shut down the pump in the dispensing system or to shut a valve to prevent drainage of the system. The indication signal may be temporarily delayed (at H) in order to obviate spurious operation of the "No liquid" detector to prevent it tripping when a gas or foam pocket passes through the ultrasonic beam.</description><edition>4</edition><language>eng</language><subject>MEASURING ; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL ; METERING BY VOLUME ; PHYSICS ; TESTING</subject><creationdate>1987</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19870121&DB=EPODOC&CC=GB&NR=2177510A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19870121&DB=EPODOC&CC=GB&NR=2177510A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GEOFFREY GLASGOW</creatorcontrib><title>Detecting the presence or absence of a liquid</title><description>An ultrasonic signal is passed through a pipe D in a liquid (e.g. beer) dispensing system to determine the presence or absence of liquid within the pipe according to the attenuation of the soundwaves. The attenuation level of the received ultrasonic signal is compared (at F) with a predetermined reference level, and if the attenuation is low a "no liquid" indication (at K) is provided.This indication signal can be used to shut down the pump in the dispensing system or to shut a valve to prevent drainage of the system. The indication signal may be temporarily delayed (at H) in order to obviate spurious operation of the "No liquid" detector to prevent it tripping when a gas or foam pocket passes through the ultrasonic beam.</description><subject>MEASURING</subject><subject>MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL</subject><subject>METERING BY VOLUME</subject><subject>PHYSICS</subject><subject>TESTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1987</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNB1SS1JTS7JzEtXKMlIVSgoSi1OzUtOVcgvUkhMgjLTFBIVcjILSzNTeBhY0xJzilN5oTQ3g7yba4izh25qQX58anFBYnJqXmpJvLuTkaG5uamhgaMxYRUA6SEoqw</recordid><startdate>19870121</startdate><enddate>19870121</enddate><creator>GEOFFREY GLASGOW</creator><scope>EVB</scope></search><sort><creationdate>19870121</creationdate><title>Detecting the presence or absence of a liquid</title><author>GEOFFREY GLASGOW</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_GB2177510A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1987</creationdate><topic>MEASURING</topic><topic>MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL</topic><topic>METERING BY VOLUME</topic><topic>PHYSICS</topic><topic>TESTING</topic><toplevel>online_resources</toplevel><creatorcontrib>GEOFFREY GLASGOW</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GEOFFREY GLASGOW</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Detecting the presence or absence of a liquid</title><date>1987-01-21</date><risdate>1987</risdate><abstract>An ultrasonic signal is passed through a pipe D in a liquid (e.g. beer) dispensing system to determine the presence or absence of liquid within the pipe according to the attenuation of the soundwaves. The attenuation level of the received ultrasonic signal is compared (at F) with a predetermined reference level, and if the attenuation is low a "no liquid" indication (at K) is provided.This indication signal can be used to shut down the pump in the dispensing system or to shut a valve to prevent drainage of the system. The indication signal may be temporarily delayed (at H) in order to obviate spurious operation of the "No liquid" detector to prevent it tripping when a gas or foam pocket passes through the ultrasonic beam.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
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subjects	MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS TESTING
title	Detecting the presence or absence of a liquid
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