BR9808081A - Sistema foto-acústico para detecção de vazamentos e processo para detecção de um gás que vaza de um componente. - Google Patents

Sistema foto-acústico para detecção de vazamentos e processo para detecção de um gás que vaza de um componente.

Info

Publication number
BR9808081A
BR9808081A BR9808081-4A BR9808081A BR9808081A BR 9808081 A BR9808081 A BR 9808081A BR 9808081 A BR9808081 A BR 9808081A BR 9808081 A BR9808081 A BR 9808081A
Authority
BR
Brazil
Prior art keywords
photo
acoustic
component
signal
frequency
Prior art date
Application number
BR9808081-4A
Other languages
English (en)
Inventor
Frederick T Olender
Bernard A Woody
Leon A Newman
Original Assignee
Carrier Corp
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 by Carrier Corp filed Critical Carrier Corp
Publication of BR9808081A publication Critical patent/BR9808081A/pt

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/38—Investigating fluid-tightness of structures by using light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

"SISTEMA FOTO-ACúSTICO PARA DETECçãO DE VAZAMENTOS E PROCESSO PARA DETECçãO DE UM GáS QUE VAZA DE UM COMPONENTE". Trata-se de um sistema foto-acústico para detecção de vazamentos para detectar um gás que vaza de um componente (30), que inclui pelo menos um feixe de laser (20), que incide sobre o componente (30) e que possui um comprimento de onda que é absorvido pelo gás, o gás emitindo um sinal foto-acústico (36) quando o gás absorve luz do feixe (20), o feixe (20) sendo pulsado numa freq³ência de pulso, a freq³ência de pulso sendo relacionada com uma freq³ência de detecção do sinal foto-acústico e sendo uma freq³ência na qual a magnitude de ruído acústico de segundo plano na freq³ência de detecção se encontra num nível baixo previamente determinado, pelo menos um sensor acústico (40), que recebe o sinal foto-acústico (36) e fornece um sinal de sensor através da linha (42) indicativo do mesmo para um filtro (44) e um detetor síncrono (18), que fornecem um sinal filtrado através de uma linha (50) para um processador de sinais (52). O processador (52) fornece um sinal de saída através de uma linha (54) indicativo do vazamento no componente. O ajuste dessa freq³ência de pulso para uma freq³ência de ruído acústico de nível baixo permite um aumento significativo da resposta de sinal-para-ruído.
BR9808081-4A 1997-03-27 1998-03-25 Sistema foto-acústico para detecção de vazamentos e processo para detecção de um gás que vaza de um componente. BR9808081A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/824,948 US5780724A (en) 1997-03-27 1997-03-27 Photo-acoustic leak detector with improved signal-to-noise response
PCT/US1998/005820 WO1998044327A1 (en) 1997-03-27 1998-03-25 Photo-acoustic leak detector with improved signal-to-noise response

Publications (1)

Publication Number Publication Date
BR9808081A true BR9808081A (pt) 2000-03-08

Family

ID=25242731

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9808081-4A BR9808081A (pt) 1997-03-27 1998-03-25 Sistema foto-acústico para detecção de vazamentos e processo para detecção de um gás que vaza de um componente.

Country Status (7)

Country Link
US (1) US5780724A (pt)
EP (1) EP0970358B1 (pt)
JP (1) JP3993248B2 (pt)
AU (1) AU6583098A (pt)
BR (1) BR9808081A (pt)
ES (1) ES2226113T3 (pt)
WO (1) WO1998044327A1 (pt)

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Also Published As

Publication number Publication date
JP2001519903A (ja) 2001-10-23
US5780724A (en) 1998-07-14
EP0970358B1 (en) 2004-10-06
EP0970358A1 (en) 2000-01-12
AU6583098A (en) 1998-10-22
JP3993248B2 (ja) 2007-10-17
WO1998044327A1 (en) 1998-10-08
ES2226113T3 (es) 2005-03-16

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