GB1302028A - - Google Patents

Info

Publication number
GB1302028A
GB1302028A GB1624769A GB1302028DA GB1302028A GB 1302028 A GB1302028 A GB 1302028A GB 1624769 A GB1624769 A GB 1624769A GB 1302028D A GB1302028D A GB 1302028DA GB 1302028 A GB1302028 A GB 1302028A
Authority
GB
United Kingdom
Prior art keywords
pipe
frequency
microphone
indicator
resonances
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1624769A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1302028A publication Critical patent/GB1302028A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/002—Detection of leaks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/04—Systems determining presence of a target
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

1302028 Monitoring reactors UNITED KINGDOM ATOMIC ENERGY AUTHORITY 24 March 1970 [27 March 1969] 16247/69 Heading G6C [Also in Division H4] To determine the position of a blockage in a gas-filled pipe or of a hole in the pipe wall, a varying frequency acoustic signal is generated in one end of the pipe and the average frequency spacing of the natural resonances of the gas column in the pipe is evaluated. In the Fig. 1 embodiment the pipe 11 forms part of a burst fuel can detecting system which samples gas in nuclear reactor vessel 14. Outside the vessel 14 the pipe 11 has a branch 11b joined to a conventional electrostatic precipitator device 15. Variable frequency oscillator 22 drives loudspeaker 19 on a pipe extension 18 connected by a flanged joint 17 to a second branch 11c and resonances are detected by microphone 20a feeding a frequency response indicator 21 which plots sound level against oscillator frequency. A second microphone, 20b, may provide a reference signal for use with a coherent demodulator in indicator 21, to discriminate against extraneous noise. Digital computer 23 may be used to calculate the distance from microphone 20a to an impedance discontinuity (hole or blockage), which distance is related to the mean frequency spacing of the resonances. Computer 23 or an ordinary spectrum analyser may alternatively be used to carry out an harmonic analysis of the frequency response of the pipe to indicate distances to one or more impedance discontinuities. A tape recorder (24, Fig. 3, not shown) may replace oscillator 22 and indicator 21, a pre-recorded frequency sweep being used to drive loud-speaker 19 and the microphone signals being recorded for later analysis.
GB1624769A 1969-03-27 1969-03-27 Expired GB1302028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1624769 1969-03-27

Publications (1)

Publication Number Publication Date
GB1302028A true GB1302028A (en) 1973-01-04

Family

ID=10073862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1624769A Expired GB1302028A (en) 1969-03-27 1969-03-27

Country Status (1)

Country Link
GB (1) GB1302028A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399701A (en) * 1980-06-03 1983-08-23 Unisearch Limited Method and means for detecting decay in wood
WO2004005914A1 (en) * 2002-07-05 2004-01-15 Drallmesstechnik Tippelmann Gmbh Method and device for testing a hollow body
US20150114120A1 (en) * 2012-02-22 2015-04-30 Hochschule Offenburg Method and Apparatus for Determining Properties of a Pipeline, in Particular the Position of a Branch of a Sewage Pipeline
GB2545441A (en) * 2015-12-15 2017-06-21 Reece Innovation Centre Ltd System for monitoring and/or surveying conduits

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399701A (en) * 1980-06-03 1983-08-23 Unisearch Limited Method and means for detecting decay in wood
WO2004005914A1 (en) * 2002-07-05 2004-01-15 Drallmesstechnik Tippelmann Gmbh Method and device for testing a hollow body
US20150114120A1 (en) * 2012-02-22 2015-04-30 Hochschule Offenburg Method and Apparatus for Determining Properties of a Pipeline, in Particular the Position of a Branch of a Sewage Pipeline
US10094659B2 (en) * 2012-02-22 2018-10-09 Hochschule Offenburg Method and apparatus for determining properties of a pipeline, in particular the position of a branch of a sewage pipeline
GB2545441A (en) * 2015-12-15 2017-06-21 Reece Innovation Centre Ltd System for monitoring and/or surveying conduits
US10928513B2 (en) 2015-12-15 2021-02-23 Reece Innovation Centre Limited System for monitoring and/or surveying conduits
GB2545441B (en) * 2015-12-15 2022-09-14 Water Intelligence Int Ltd System for monitoring and/or surveying conduits

Similar Documents

Publication Publication Date Title
US10634784B2 (en) Device and method for detecting main acoustic indexes of multi-beam sonar
US3508433A (en) Pipeline leak detector
US5531099A (en) Underground conduit defect localization
EP0418224B1 (en) Transducer device operating with ultrasound for the measurement of the flow velocity of a fluid in a pipe
JPS5523476A (en) Detection circuit device for ultrasonic propagation time
ES8400195A1 (en) Sonic pressure volume measuring device.
GB1531827A (en) Alarm system for detecting disturbance of a solid medium
GB1372724A (en) Detection of velocities of fluids in conduits
GB1302028A (en)
KR830008343A (en) Industrial Plant Sound Monitoring Method and Apparatus
ES475710A1 (en) Method of and apparatus for detecting corona
GB1346523A (en) Pipeline leak detector and method
Hutton Detecting acoustic emission in the presence of hydraulic noise
ES305396A1 (en) Sound analyzer device for the mediation of sound speed in a gas (Machine-translation by Google Translate, not legally binding)
Lions et al. Apparatus for ultrasonic visualization in sodium (VISUS) and acoustic detection in the Phenix Reactor
JPS5764126A (en) Oscillation detecting apparatus
SU987279A1 (en) Leakage finder in buried pipelines
US3400215A (en) Voiced sound fundamental frequency detector
Latham Improvements in the detection of flaws and blockages in pipes
JPS54136386A (en) Acoustic diagnosis abnormality detecting device
JPS57176506A (en) Recording system of tape recorder
JPS5329107A (en) Magnetic recorder
JPH026742A (en) Gas insulated apparatus
Pape et al. Leak Detection in Recovery Boilers Using Acoustic Emission
GB1294219A (en) Method of detecting and measuring the vibrations of objects by means of ultrasonics

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees