WO2000075605B1 - System for measuring loadings in a structure, measuring unit and measuring sensor - Google Patents

System for measuring loadings in a structure, measuring unit and measuring sensor

Info

Publication number
WO2000075605B1
WO2000075605B1 PCT/FI2000/000492 FI0000492W WO0075605B1 WO 2000075605 B1 WO2000075605 B1 WO 2000075605B1 FI 0000492 W FI0000492 W FI 0000492W WO 0075605 B1 WO0075605 B1 WO 0075605B1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring
sensor
unit
strain gauge
measuring unit
Prior art date
Application number
PCT/FI2000/000492
Other languages
French (fr)
Other versions
WO2000075605A1 (en
Inventor
Risto Sakari Rouvari
Original Assignee
Rouvari Oy R
Risto Sakari Rouvari
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 Rouvari Oy R, Risto Sakari Rouvari filed Critical Rouvari Oy R
Priority to US10/009,377 priority Critical patent/US6701260B1/en
Priority to KR1020017015477A priority patent/KR20020014807A/en
Priority to AU47625/00A priority patent/AU4762500A/en
Priority to EEP200100654A priority patent/EE200100654A/en
Priority to EP00929602A priority patent/EP1194730A1/en
Priority to JP2001501837A priority patent/JP4156833B2/en
Publication of WO2000075605A1 publication Critical patent/WO2000075605A1/en
Publication of WO2000075605B1 publication Critical patent/WO2000075605B1/en
Priority to NO20015895A priority patent/NO20015895L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
    • G01G7/02—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance

Abstract

The invention relates to a system for measuring loading, stresses and/or material fatigue in a structure. The invention also relates to a measuring sensor unit (50) and a measuring sensor (302) suitable for use in connection with said method. The invention is applicable especially to the measurement of stresses and loading on a ship hull. One inventive idea is that the measuring sensor unit (50) of the measuring system comprises means (310) for processing a signal from the sensor so as to allow complete mathematical measuring results to be transmitted (316, 21) from the measuring sensor unit to the central processing unit. Another inventive idea is to form a measuring sensor from the sensor assembly and the strain gauge so that deformations are transmitted to the strain gauge attached to an elastic area of the sensor assembly. By means of the invention, the measuring units can be calibrated apart from the structure material and additional measuring units can be provided in the system whenever necessary.

Claims

AMENDED CLAIMS[received by the International Bureau on 15 December 2000 (15.12.00); original claims 1-14 replaced by new claims 1-16 (3 pages)]
1. A system for measuring loading on a structure, comprising a central processing unit (20) and at least one measuring unit (30, 32, 34), characterised in that the measuring unit comprises
- a measuring sensor (302, 50) for converting deformations of the structure into an electric signal,
- means (308) for converting said signal into a digital signal,
- means (310) for mathematical processing of said signal, and - means (316, 21) for transmitting the processing results to the central processing unit, the central processing unit comprising means for receiving and collecting the processing results transmitted from at least one measuring unit.
2. A system as defined in claim 1, characterised in that the system comprises means for controlling the functions of at least one measuring unit from the central processing unit.
3. A system as defined in claim 1 or 2, characterised in that the data communica- tion between the central processing unit (20) and the measuring units (30, 32, 34) takes place over a bus (21), to which at least two measuring units have been connected, and an identifier logically identifying the measuring unit has been connected to the measuring units, the identifier being transferred between the measuring unit and the central processing unit in order to identify data addressed to a given measur- ing unit and data sent from a given measuring unit.
4. A system as defined in any of claims 1 to 3, characterised in that said at least one measuring unit is removably attached to the structure material to be measured.
5. A measuring sensor (50) for measuring loading on a structure, characterised in comprising a sensor assembly (502) which is attached to the structure to be measured and comprises two rigid parts (504, 508) for attachment to the structure to be measured and an elastic part (506) between these, a first strain gauge (530) having been attached to the elastic part for fransπutting deformations of the structure and the sensor assembly to the strain gauge with a view to generate a signal proportional to the deformations. 1 3
6. A measuring sensor as defined in claim 5, characterised in comprising a second strain gauge (532) for temperature compensation which is attached to a portion of the base where no substantial deformations occur.
7. A measuring sensor as defined in claim 6, characterised in that said first strain gauge and second strain gauge are integrated in a Wheatstone bridge (302).
8. A measuring sensor as defined in any of claims 5-7, characterised in that said sensor assembly comprises a double-H opening (510, 512) for forming an elastic area and providing a measuring point for said first strain gauge (530).
9. A measuring sensor as defined in claim 8, characterised in said first strain gauge is attached between two H openings.
10. A measuring sensor as defined in claim 6 and 8 or 9, characterised in that the second strain gauge (532) is attached to the central member of the H opening.
11. A measuring sensor as defined in any of claims 5-10, characterised in that the elastic area/limit of elasticity (σE) of the sensor assembly material is selected so as to be higher than that of the structure material.
12. A measuring sensor as defined in any of claims 5-11, characterised in that the rigid surfaces (544, 548) bearing against the structure material to be measured or against the fastening members provided in the structure material have been rough- ened to enhance the friction of the joint.
13. A measuring unit (30) for measuring loading on a structure, characterised in that the measuring unit comprises
- a measuring sensor (302) for converting deformations of the structure into an elec- trie signal,
- means (308) for converting said signal into a digital signal,
- means (310) for mathematical processing of the digital signal, and
- means (316) for transmitting the processing results to the central processing unit.
14. A measuring unit as defined in claim 13, characterised in comprising means (520, 522) for removable attachment to the structure material.
15. A system as defined in claim 1, characterised in that the system comprises automatic reconfiguration data network.
16. A measuring unit as defined in claim 13, characterised in that the measuring unit comprises means for connecting to the reconfiguration data network.
PCT/FI2000/000492 1999-06-03 2000-06-02 System for measuring loadings in a structure, measuring unit and measuring sensor WO2000075605A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US10/009,377 US6701260B1 (en) 1999-06-03 2000-06-02 System for measuring loadings in a structure, measuring unit and measuring sensor
KR1020017015477A KR20020014807A (en) 1999-06-03 2000-06-02 System for Measuring Loading on a Structure, Measuring Unit and Measuring Sensor
AU47625/00A AU4762500A (en) 1999-06-03 2000-06-02 System for measuring loadings in a structure, measuring unit and measuring sensor
EEP200100654A EE200100654A (en) 1999-06-03 2000-06-02 System for measuring structural loads, measuring unit and measuring sensor
EP00929602A EP1194730A1 (en) 1999-06-03 2000-06-02 System for measuring loadings in a structure, measuring unit and measuring sensor
JP2001501837A JP4156833B2 (en) 1999-06-03 2000-06-02 System for measuring load in structure, measurement unit and measurement sensor
NO20015895A NO20015895L (en) 1999-06-03 2001-12-03 System for measuring loads in a structure, as well as measuring unit and measuring sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI991270A FI107193B (en) 1999-06-03 1999-06-03 Measuring probe
FI991270 1999-06-03

Publications (2)

Publication Number Publication Date
WO2000075605A1 WO2000075605A1 (en) 2000-12-14
WO2000075605B1 true WO2000075605B1 (en) 2001-03-08

Family

ID=8554800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/000492 WO2000075605A1 (en) 1999-06-03 2000-06-02 System for measuring loadings in a structure, measuring unit and measuring sensor

Country Status (10)

Country Link
US (1) US6701260B1 (en)
EP (1) EP1194730A1 (en)
JP (1) JP4156833B2 (en)
KR (1) KR20020014807A (en)
CN (1) CN1190652C (en)
AU (1) AU4762500A (en)
EE (1) EE200100654A (en)
FI (1) FI107193B (en)
NO (1) NO20015895L (en)
WO (1) WO2000075605A1 (en)

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CN1295480C (en) * 2005-01-31 2007-01-17 中南大学 Non-contact stress measuring device for large structure frame
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DE102006044692B4 (en) * 2006-09-22 2017-02-02 Deutsches Zentrum für Luft- und Raumfahrt e.V. Angle-measuring arrangement
US7878069B2 (en) 2009-05-04 2011-02-01 Kulite Semiconductor Products, Inc. Torque insensitive header assembly
US7559248B2 (en) * 2007-07-03 2009-07-14 Kulite Semiconductor Products, Inc. High pressure transducer having an H shaped cross-section
US8296053B1 (en) 2007-10-09 2012-10-23 Lockheed Martin Corporation System and method for determining relative motion between ship combat system elements
US8432537B2 (en) * 2008-06-16 2013-04-30 Duhane Lam Photoelastic coating for structural monitoring
WO2012031961A1 (en) * 2010-09-09 2012-03-15 Inventio Ag Load measuring device for an elevator installation
CN102175472A (en) * 2010-12-31 2011-09-07 大连理工大学 Wireless intelligent fatigue monitoring system based on life annual ring bionic mechanism
CN102636306B (en) * 2012-03-30 2014-04-16 中国船舶重工集团公司第七○二研究所 Distributed strain collector for long-term safety monitoring of ship structure
CN104849030B (en) * 2014-12-19 2018-08-24 北京宝沃汽车有限公司 Connecting rod dynamic load test device for reciprocating-piston engine
CN104748664B (en) * 2015-03-13 2017-10-24 南华大学 A kind of Rock And Soil internal displacement system for measuring quantity
WO2017074165A1 (en) * 2015-10-30 2017-05-04 주식회사 임프레시보코리아 Apparatus, method and non-transitory computer-readable recording medium for detecting transformation of flexible structure
CN105865781A (en) * 2016-06-14 2016-08-17 广东精铟海洋工程股份有限公司 Strip load measuring device based on double-Wheatstone-bridge connection
KR102590454B1 (en) 2016-07-07 2023-10-17 더 보드 어브 트러스티스 어브 더 리랜드 스탠포드 주니어 유니버시티 Antibody-Adjuvant Conjugate
CN106248045A (en) * 2016-09-06 2016-12-21 西安交通大学 A kind of strain measurement system of anti-strong electromagnetic
CN106840151B (en) * 2017-01-23 2019-05-17 厦门大学 Model-free deformation of hull measurement method based on delay compensation
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Also Published As

Publication number Publication date
FI991270A (en) 2000-12-04
FI107193B (en) 2001-06-15
CN1353808A (en) 2002-06-12
NO20015895D0 (en) 2001-12-03
US6701260B1 (en) 2004-03-02
JP4156833B2 (en) 2008-09-24
NO20015895L (en) 2001-12-03
KR20020014807A (en) 2002-02-25
CN1190652C (en) 2005-02-23
EE200100654A (en) 2003-02-17
FI991270A0 (en) 1999-06-03
AU4762500A (en) 2000-12-28
JP2003501641A (en) 2003-01-14
WO2000075605A1 (en) 2000-12-14
EP1194730A1 (en) 2002-04-10

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