CA2255975A1 - Measuring circuit - Google Patents

Measuring circuit Download PDF

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Publication number
CA2255975A1
CA2255975A1 CA 2255975 CA2255975A CA2255975A1 CA 2255975 A1 CA2255975 A1 CA 2255975A1 CA 2255975 CA2255975 CA 2255975 CA 2255975 A CA2255975 A CA 2255975A CA 2255975 A1 CA2255975 A1 CA 2255975A1
Authority
CA
Canada
Prior art keywords
measuring circuit
amplifier
transducer
input signals
delivering
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.)
Granted
Application number
CA 2255975
Other languages
French (fr)
Other versions
CA2255975C (en
Inventor
Bernard Broillet
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.)
Meggitt SA
Original Assignee
Vibro Meter 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 Vibro Meter SA filed Critical Vibro Meter SA
Publication of CA2255975A1 publication Critical patent/CA2255975A1/en
Application granted granted Critical
Publication of CA2255975C publication Critical patent/CA2255975C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
    • G01L23/225—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor

Abstract

A measuring circuit comprising a symmetric transmission line connecting a transducer to a measurement amplifier and to a fault indicating signal amplifier, the transducer delivering symmetric input signals to said amplifiers, the first amplifier delivering a measuring signal representing the difference of its input signals and the fault indicating signal amplifier delivering a fault indicating signal representing the sum of the input signals. An auxiliary signal injected to the terminals of the transducer the invention enables the measuring circuit to evaluate the quality of the measuring circuit during operation of the tested machine and also when the machine is at rest.
CA 2255975 1998-09-15 1998-12-14 Measuring circuit Expired - Lifetime CA2255975C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19980810920 EP0987554B1 (en) 1998-09-15 1998-09-15 Measuring circuit
EP98810920.3 1998-09-15

Publications (2)

Publication Number Publication Date
CA2255975A1 true CA2255975A1 (en) 2000-03-15
CA2255975C CA2255975C (en) 2004-02-10

Family

ID=8236322

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2255975 Expired - Lifetime CA2255975C (en) 1998-09-15 1998-12-14 Measuring circuit

Country Status (5)

Country Link
EP (1) EP0987554B1 (en)
CA (1) CA2255975C (en)
DE (1) DE69832980T2 (en)
DK (1) DK0987554T3 (en)
ES (1) ES2255144T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2703825A1 (en) * 2012-08-31 2014-03-05 Meggitt SA Force sensor and method for testing its reliability
EP3524988A1 (en) * 2018-02-07 2019-08-14 Analog Devices Global Unlimited Company A method of and apparatus for detecting open circuit or other failure conditions at an input to a signal chain and for detecting channel imbalance in a differential signal chain
US10476458B2 (en) 2018-02-07 2019-11-12 Analog Devices Global Unlimited Company Method of and apparatus for detecting open circuit conditions at an input to a signal chain and for detecting channel imbalance in a differential signal chain

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010101713A (en) * 1999-11-27 2001-11-14 롤페스 요하네스 게라투스 알베르투스 Testing electrical circuits
FI120803B (en) * 2007-05-21 2010-03-15 Waertsilae Finland Oy detector device
CN106225911A (en) * 2016-08-29 2016-12-14 广东履安实业有限公司 A kind of pick up for machine sound diagnosis
EP3824300A1 (en) 2018-07-19 2021-05-26 Kistler Holding AG Measuring circuit for capturing and processing signals, and measuring device for using said measuring circuit
FR3098587B1 (en) * 2019-07-08 2021-06-11 Safran Aircraft Engines Method and system for detecting open circuits of accelerometers by phase noise

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658908A5 (en) * 1983-09-06 1986-12-15 Vibro Meter Ag Measurement circuit and its use
US5070843A (en) * 1989-05-15 1991-12-10 Mitsubishi Denki Kabushiki Kaisha Ignition timing control apparatus of internal-combustion engine
GB2253487B (en) * 1991-03-07 1994-08-03 Rover Group A method of detecting malfunction of a piezoelectric sensor
US5753793A (en) * 1993-08-24 1998-05-19 A/S Bruel & Kjaer Apparatus for detecting the malfunctioning of an accelerometer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2703825A1 (en) * 2012-08-31 2014-03-05 Meggitt SA Force sensor and method for testing its reliability
CN103674400A (en) * 2012-08-31 2014-03-26 梅吉特股份有限公司 Force sensor and method for testing its reliability
US9057655B2 (en) 2012-08-31 2015-06-16 Meggitt Sa Force sensor and method for testing its reliability
EP3524988A1 (en) * 2018-02-07 2019-08-14 Analog Devices Global Unlimited Company A method of and apparatus for detecting open circuit or other failure conditions at an input to a signal chain and for detecting channel imbalance in a differential signal chain
US10476458B2 (en) 2018-02-07 2019-11-12 Analog Devices Global Unlimited Company Method of and apparatus for detecting open circuit conditions at an input to a signal chain and for detecting channel imbalance in a differential signal chain

Also Published As

Publication number Publication date
EP0987554B1 (en) 2005-12-28
ES2255144T3 (en) 2006-06-16
CA2255975C (en) 2004-02-10
EP0987554A1 (en) 2000-03-22
DK0987554T3 (en) 2006-03-06
DE69832980D1 (en) 2006-02-02
DE69832980T2 (en) 2006-07-06

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Effective date: 20181214