CA2434958A1 - Electromagnetic analysis of concrete tensioning strands - Google Patents

Electromagnetic analysis of concrete tensioning strands Download PDF

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Publication number
CA2434958A1
CA2434958A1 CA002434958A CA2434958A CA2434958A1 CA 2434958 A1 CA2434958 A1 CA 2434958A1 CA 002434958 A CA002434958 A CA 002434958A CA 2434958 A CA2434958 A CA 2434958A CA 2434958 A1 CA2434958 A1 CA 2434958A1
Authority
CA
Canada
Prior art keywords
cylinder
phase
testing
magnetic flux
apparatus includes
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
CA002434958A
Other languages
French (fr)
Other versions
CA2434958C (en
Inventor
John Mcintyre
Kevin Mitchell
Peter O. Paulson
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.)
Pure Technologies Ltd
Original Assignee
Individual
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
Priority claimed from CA002332473A external-priority patent/CA2332473A1/en
Priority claimed from CA002356239A external-priority patent/CA2356239A1/en
Priority claimed from CA002361813A external-priority patent/CA2361813A1/en
Application filed by Individual filed Critical Individual
Priority to CA002477877A priority Critical patent/CA2477877C/en
Priority to CA002477880A priority patent/CA2477880C/en
Priority to CA002434958A priority patent/CA2434958C/en
Publication of CA2434958A1 publication Critical patent/CA2434958A1/en
Application granted granted Critical
Publication of CA2434958C publication Critical patent/CA2434958C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9013—Arrangements for scanning
    • G01N27/902—Arrangements for scanning by moving the sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
    • G01N33/383—Concrete or cement

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

Discloses methods to perform magnetic testing of tensioning elements in a pr e- stressed concrete cylinder, such as a pipe or water reservoir and testing apparatus. The apparatus includes magnetic flux production means and detecto r means disposed proximal to a surface of the cylinder in a plane in common wi th the magnetic flux production means that is orthogonal to an axis of the cylinder. The apparatus operates over a range of low frequency signals, for example, between 20 and 300 hertz or a pulse. Output of the inspection apparatus includes a signal and distance plot showing the results of testing a cylinder at one or more frequencies. In accordance with another method of analysis, a characteristic of the phase of the output over distance is plotted, including the phase or representations of the in-phase or quadratur e components of the received signal in relation to the driving signal.
CA002434958A 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands Expired - Lifetime CA2434958C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002477877A CA2477877C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002477880A CA2477880C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002434958A CA2434958C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CA002332473A CA2332473A1 (en) 2001-01-29 2001-01-29 Monitoring system for prestressed concrete pipes
CA2,332,473 2001-01-29
CA002356239A CA2356239A1 (en) 2001-01-29 2001-08-27 Low frequency electromagnetic analysis of prestressed concrete pipe tensioning strands
CA2,356,239 2001-08-27
CA002361813A CA2361813A1 (en) 2001-01-29 2001-11-13 Low frequency electromagnetic analysis of prestressed concrete tensioning strands
CA2,361,813 2001-11-13
PCT/CA2002/000085 WO2002061412A2 (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002434958A CA2434958C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA002477877A Division CA2477877C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002477880A Division CA2477880C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands

Publications (2)

Publication Number Publication Date
CA2434958A1 true CA2434958A1 (en) 2002-08-08
CA2434958C CA2434958C (en) 2005-05-03

Family

ID=28046559

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002434958A Expired - Lifetime CA2434958C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002477877A Expired - Lifetime CA2477877C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002477880A Expired - Lifetime CA2477880C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA002477877A Expired - Lifetime CA2477877C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands
CA002477880A Expired - Lifetime CA2477880C (en) 2001-01-29 2002-01-29 Electromagnetic analysis of concrete tensioning strands

Country Status (1)

Country Link
CA (3) CA2434958C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114791375B (en) * 2022-05-04 2022-10-04 浙江致远工程管理有限公司 Intelligent equipment for building material inspection

Also Published As

Publication number Publication date
CA2477880C (en) 2005-06-14
CA2434958C (en) 2005-05-03
CA2477877A1 (en) 2002-08-08
CA2477880A1 (en) 2002-08-08
CA2477877C (en) 2008-07-08

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20220131

MKEX Expiry

Effective date: 20220131