FR2310558A1 - Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test - Google Patents

Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test

Info

Publication number
FR2310558A1
FR2310558A1 FR7514375A FR7514375A FR2310558A1 FR 2310558 A1 FR2310558 A1 FR 2310558A1 FR 7514375 A FR7514375 A FR 7514375A FR 7514375 A FR7514375 A FR 7514375A FR 2310558 A1 FR2310558 A1 FR 2310558A1
Authority
FR
France
Prior art keywords
receiver
under test
air leakage
vessel under
leakage detector
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.)
Withdrawn
Application number
FR7514375A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Priority to FR7514375A priority Critical patent/FR2310558A1/en
Publication of FR2310558A1 publication Critical patent/FR2310558A1/en
Withdrawn legal-status Critical Current

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
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • 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)
  • Examining Or Testing Airtightness (AREA)

Abstract

An air leak detector for checking the air tightness of a closed vessel (4) in particular a cockpit of an automobile, (5) comprises an ultrasonic signal generator and a receiver of ultrasonic signals operating at the same frequency as the generator. One is placed inside the vessel and the other outside. The receiver has a signalling device (7) which is triggered when the intensity of ultrasonic signals received passes a predetermined level. The transmitter and receiver have piezoelectric ceramic transducers operating at frequencies between 12 kHz and 10 MHz. A sensitivity control in the form of a potentiometer is between the receiver transducer and its first stage amplifier, and it is connected by a flexible cable.
FR7514375A 1975-05-07 1975-05-07 Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test Withdrawn FR2310558A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7514375A FR2310558A1 (en) 1975-05-07 1975-05-07 Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7514375A FR2310558A1 (en) 1975-05-07 1975-05-07 Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test

Publications (1)

Publication Number Publication Date
FR2310558A1 true FR2310558A1 (en) 1976-12-03

Family

ID=9154991

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7514375A Withdrawn FR2310558A1 (en) 1975-05-07 1975-05-07 Ultrasonic air leakage detector - has piezoelectric transmitter and receiver transducers, one inside and one outside vessel under test

Country Status (1)

Country Link
FR (1) FR2310558A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016656A1 (en) * 1979-03-24 1980-10-01 Bl Cars Limited Testing vehicle seals
EP0260818A2 (en) * 1986-09-18 1988-03-23 General Motors Corporation Method and apparatus for detecting leaks in automotive vehicle bodies
DE19616223A1 (en) * 1995-09-19 1997-03-20 Kia Motors Corp Ultrasonic tightness test system for motor vehicle using ultrasound generator
US6430988B1 (en) * 1999-01-27 2002-08-13 M.E.C. & Co., Ltd. Ultrasonic leakage inspection device of non-pressure type
GB2388191A (en) * 2002-05-02 2003-11-05 Qst Holdings Llc Ultrasonic apparatus for detecting leaks in a sealed compartment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016656A1 (en) * 1979-03-24 1980-10-01 Bl Cars Limited Testing vehicle seals
EP0260818A2 (en) * 1986-09-18 1988-03-23 General Motors Corporation Method and apparatus for detecting leaks in automotive vehicle bodies
EP0260818A3 (en) * 1986-09-18 1988-07-13 General Motors Corporation Method and apparatus for detecting leaks in automotive vehicle bodies
DE19616223A1 (en) * 1995-09-19 1997-03-20 Kia Motors Corp Ultrasonic tightness test system for motor vehicle using ultrasound generator
DE19616223C2 (en) * 1995-09-19 2003-06-18 Kia Motors Corp Leakage test device for motor vehicles
US6430988B1 (en) * 1999-01-27 2002-08-13 M.E.C. & Co., Ltd. Ultrasonic leakage inspection device of non-pressure type
GB2388191A (en) * 2002-05-02 2003-11-05 Qst Holdings Llc Ultrasonic apparatus for detecting leaks in a sealed compartment
GB2388191B (en) * 2002-05-02 2005-07-20 Qst Holdings Llc Apparatus for automatically judging the sealing effectiveness of a sealed compartment
US6983642B2 (en) 2002-05-02 2006-01-10 Qst Holdings, L.L.C. System and method for automatically judging the sealing effectiveness of a sealed compartment
US8365580B2 (en) 2002-05-02 2013-02-05 Qst Holdings, Llc System and method for automatically judging the sealing effectiveness of a sealed compartment

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Legal Events

Date Code Title Description
ST Notification of lapse