GB2158240B - A null-balanced proximity sensor - Google Patents

A null-balanced proximity sensor

Info

Publication number
GB2158240B
GB2158240B GB08410678A GB8410678A GB2158240B GB 2158240 B GB2158240 B GB 2158240B GB 08410678 A GB08410678 A GB 08410678A GB 8410678 A GB8410678 A GB 8410678A GB 2158240 B GB2158240 B GB 2158240B
Authority
GB
United Kingdom
Prior art keywords
null
proximity sensor
balanced
balanced proximity
sensor
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
GB08410678A
Other versions
GB8410678D0 (en
GB2158240A (en
Inventor
Arthur Edward Brewster
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB08410678A priority Critical patent/GB2158240B/en
Publication of GB8410678D0 publication Critical patent/GB8410678D0/en
Publication of GB2158240A publication Critical patent/GB2158240A/en
Application granted granted Critical
Publication of GB2158240B publication Critical patent/GB2158240B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/108—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils the emitter and the receiver coils or loops being uncoupled by positioning them perpendicularly to each other

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
GB08410678A 1984-04-26 1984-04-26 A null-balanced proximity sensor Expired GB2158240B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08410678A GB2158240B (en) 1984-04-26 1984-04-26 A null-balanced proximity sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08410678A GB2158240B (en) 1984-04-26 1984-04-26 A null-balanced proximity sensor

Publications (3)

Publication Number Publication Date
GB8410678D0 GB8410678D0 (en) 1984-05-31
GB2158240A GB2158240A (en) 1985-11-06
GB2158240B true GB2158240B (en) 1988-01-27

Family

ID=10560121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08410678A Expired GB2158240B (en) 1984-04-26 1984-04-26 A null-balanced proximity sensor

Country Status (1)

Country Link
GB (1) GB2158240B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8829617D0 (en) * 1988-12-20 1989-02-15 Loma Group Ltd Method and apparatus using a varying electromagnetic field for determining the nature,or a property of a material
SE506154C2 (en) * 1995-10-13 1997-11-17 Asea Brown Boveri Method and apparatus for inductively measuring the dimensions and position of objects of electrically conductive material
NL1016416C2 (en) * 2000-10-16 2002-04-18 Nedap Nv Measuring and testing device for radio frequency identification labels, measures magnetic dipole moment of label response signal as function of investigation signal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB465338A (en) * 1935-11-05 1937-05-05 British Thomson Houston Co Ltd Improvements in and relating to apparatus for detecting the presence of metallic particles in non-metallic substances
GB729706A (en) * 1952-08-20 1955-05-11 Telefunken Gmbh Improvements in or relating to electro-magnetic metal detecting instruments
US3292052A (en) * 1963-09-19 1966-12-13 Cutler Hammer Inc Proximity switching system
GB1160672A (en) * 1966-03-23 1969-08-06 Donovan Electrical Company Ltd Improvements relating to Proximity Detectors
FR2327556A1 (en) * 1975-10-07 1977-05-06 Thomson Csf ELECTROMAGNETIC SENSOR SENSITIVE TO A MODIFICATION OF A MAGNETIC FIELD AND ITS APPLICATION TO ROAD TRAFFIC
FR2371675A1 (en) * 1976-11-19 1978-06-16 Thomson Csf ELECTROMAGNETIC SENSOR SENSITIVE TO A MODIFICATION OF A MAGNETIC FIELD AND ITS APPLICATION TO ROAD TRAFFIC
FR2468133A1 (en) * 1979-10-22 1981-04-30 Clausin Jacques DEVICE FOR DETECTING INCLUDED METAL PARTICLES IN SOLIDS, LIQUIDS OR GASES, AND LOCATING AND DETERMINING THE SIZE THEREOF

Also Published As

Publication number Publication date
GB8410678D0 (en) 1984-05-31
GB2158240A (en) 1985-11-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee