GB1209423A - Improvements relating to apparatus for the detection of flaws - Google Patents

Improvements relating to apparatus for the detection of flaws

Info

Publication number
GB1209423A
GB1209423A GB1302169A GB1302169A GB1209423A GB 1209423 A GB1209423 A GB 1209423A GB 1302169 A GB1302169 A GB 1302169A GB 1302169 A GB1302169 A GB 1302169A GB 1209423 A GB1209423 A GB 1209423A
Authority
GB
United Kingdom
Prior art keywords
detectors
flaws
amplifiers
disclosed
shift
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.)
Expired
Application number
GB1302169A
Inventor
Michael Charles Proudman
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.)
GKN Group Services Ltd
Original Assignee
GKN Group Services Ltd
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 GKN Group Services Ltd filed Critical GKN Group Services Ltd
Priority to GB1302169A priority Critical patent/GB1209423A/en
Publication of GB1209423A publication Critical patent/GB1209423A/en
Expired 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
    • G01N27/9046—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 by analysing electrical signals
    • 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
    • G01N27/904—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 with two or more sensors

Abstract

1,209,423. Electro-physical measurements - flaw detectors. G.K.N. GROUP SERVICES Ltd. March 12, 1969, No.13021/69. Addition to 1, 005, 816. Heading G1N. Flaws in moving strip material are sensed by a plurality of detectors mounted transversely of the strip and scanned electronically. Each detector is of the kind disclosed in Specification 1, 005, 816, viz a field coil such as 13a energized from an oscillator 16 and enclosing a pair of pick-up coils 14a, 15a, (which may be air cored or on ferroxcube) connected in series opposition. Two rows of the detectors are mounted substantially as disclosed in Specification 1, 143, 786 but omitting the mechanical scanning means. Each of the detectors are connected to their own amplifiers 18. phase sense detectors 19 and strobe amplifiers 32 which are gated sequentially by a cycling shift-register and shift driver circuit to pass information to a common indicator 22.
GB1302169A 1969-03-12 1969-03-12 Improvements relating to apparatus for the detection of flaws Expired GB1209423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1302169A GB1209423A (en) 1969-03-12 1969-03-12 Improvements relating to apparatus for the detection of flaws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1302169A GB1209423A (en) 1969-03-12 1969-03-12 Improvements relating to apparatus for the detection of flaws

Publications (1)

Publication Number Publication Date
GB1209423A true GB1209423A (en) 1970-10-21

Family

ID=10015365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302169A Expired GB1209423A (en) 1969-03-12 1969-03-12 Improvements relating to apparatus for the detection of flaws

Country Status (1)

Country Link
GB (1) GB1209423A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373704A1 (en) * 1976-12-07 1978-07-07 Festo Maschf Stoll G SINGLE OR DOUBLE ACTING, PNEUMATIC OR HYDRAULIC CYLINDER, EQUIPPED WITH A LOCKING SYSTEM
DE2855511A1 (en) * 1977-12-26 1979-06-28 Siderurgie Fse Inst Rech EDGE CURRENT TESTING DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373704A1 (en) * 1976-12-07 1978-07-07 Festo Maschf Stoll G SINGLE OR DOUBLE ACTING, PNEUMATIC OR HYDRAULIC CYLINDER, EQUIPPED WITH A LOCKING SYSTEM
DE2855511A1 (en) * 1977-12-26 1979-06-28 Siderurgie Fse Inst Rech EDGE CURRENT TESTING DEVICE

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees