GB2325305A - Capacitive gap measurement device - Google Patents

Capacitive gap measurement device

Info

Publication number
GB2325305A
GB2325305A GB9815823A GB9815823A GB2325305A GB 2325305 A GB2325305 A GB 2325305A GB 9815823 A GB9815823 A GB 9815823A GB 9815823 A GB9815823 A GB 9815823A GB 2325305 A GB2325305 A GB 2325305A
Authority
GB
United Kingdom
Prior art keywords
conductor
interior
metal tube
insulant
probe
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
GB9815823A
Other versions
GB2325305B (en
GB9815823D0 (en
Inventor
Anthony Geoffrey Sheard
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Publication of GB9815823D0 publication Critical patent/GB9815823D0/en
Publication of GB2325305A publication Critical patent/GB2325305A/en
Application granted granted Critical
Publication of GB2325305B publication Critical patent/GB2325305B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

A method of forming a probe (1) for capacitively measuring the distance to an object, for example to a turbine blade tip, together with a composite cable (2), comprises the steps of: (a) providing the interior of a metal tube (6) with a longitudinally extending conductor (4) and a mineral insulant (10) so that the interior is substantially filled with the conductor and insulant; (b) locating the metal tube (6) within the bore of a larger tube (8) after the exterior surface of the metal tube (6) and/or the interior surface of the larger tube (8) has been provided with a deposited layer of insulating material (12); (c) drawing the assembly of tubes so formed through a reducing die (with the exception of one and thereof) to form a cable part (2) of smaller diameter than the said one end; and (d) providing an electrode (14) at the said one end of the assembly to form the probe, which electrode extends over substantially the entire surface of exposed mineral insulant and is in electrical contact with the conductor. The method has the advantage that it enables a device to be manufactured at significantly reduced cost.
GB9815823A 1996-04-19 1997-04-18 Capacitive gap measurement device Expired - Fee Related GB2325305B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9608111.2A GB9608111D0 (en) 1996-04-19 1996-04-19 Gap Measurement Device
PCT/GB1997/001082 WO1997040340A1 (en) 1996-04-19 1997-04-18 Capacitive gap measurement device

Publications (3)

Publication Number Publication Date
GB9815823D0 GB9815823D0 (en) 1998-09-16
GB2325305A true GB2325305A (en) 1998-11-18
GB2325305B GB2325305B (en) 2000-04-19

Family

ID=10792327

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9608111.2A Pending GB9608111D0 (en) 1996-04-19 1996-04-19 Gap Measurement Device
GB9815823A Expired - Fee Related GB2325305B (en) 1996-04-19 1997-04-18 Capacitive gap measurement device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9608111.2A Pending GB9608111D0 (en) 1996-04-19 1996-04-19 Gap Measurement Device

Country Status (3)

Country Link
AU (1) AU2573797A (en)
GB (2) GB9608111D0 (en)
WO (1) WO1997040340A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406381A (en) * 2003-09-27 2005-03-30 Future Technology Capacitive sensor for measuring distance to an object
US8002517B2 (en) 2006-10-31 2011-08-23 Rolls-Royce Plc Sensor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750489B1 (en) * 1996-06-26 1998-08-28 Philips Electronics Nv COMPOSITE CAPACITIVE SENSOR DEVICE
EP2442077A1 (en) * 2010-10-12 2012-04-18 Future Technology (Sensors) Ltd Sensor assemblies
GB2522210B (en) 2014-01-16 2018-10-10 Weston Aerospace Ltd Engine probe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805150A (en) * 1970-08-17 1974-04-16 Ade Corp Environment immune high precision capacitive gauging system
JPS5537943A (en) * 1978-09-09 1980-03-17 Mitsubishi Heavy Ind Ltd Capacity type displacement measurement device
US4361799A (en) * 1980-03-27 1982-11-30 Raychem Corporation Over-temperature sense and locate device
EP0334441A1 (en) * 1988-03-25 1989-09-27 Thermocoax Capacitive transducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805150A (en) * 1970-08-17 1974-04-16 Ade Corp Environment immune high precision capacitive gauging system
JPS5537943A (en) * 1978-09-09 1980-03-17 Mitsubishi Heavy Ind Ltd Capacity type displacement measurement device
US4361799A (en) * 1980-03-27 1982-11-30 Raychem Corporation Over-temperature sense and locate device
EP0334441A1 (en) * 1988-03-25 1989-09-27 Thermocoax Capacitive transducer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Vol.004 no.070 (P-012) 23 May 1980& JP 55 037943 A, 17 March 1980 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406381A (en) * 2003-09-27 2005-03-30 Future Technology Capacitive sensor for measuring distance to an object
GB2406381B (en) * 2003-09-27 2005-10-12 Future Technology Sensors
US8002517B2 (en) 2006-10-31 2011-08-23 Rolls-Royce Plc Sensor

Also Published As

Publication number Publication date
AU2573797A (en) 1997-11-12
GB2325305B (en) 2000-04-19
GB9608111D0 (en) 1996-06-26
WO1997040340A1 (en) 1997-10-30
GB9815823D0 (en) 1998-09-16

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160418