DE69226726D1 - Nachweis von Magnetfeldveränderungen - Google Patents

Nachweis von Magnetfeldveränderungen

Info

Publication number
DE69226726D1
DE69226726D1 DE69226726T DE69226726T DE69226726D1 DE 69226726 D1 DE69226726 D1 DE 69226726D1 DE 69226726 T DE69226726 T DE 69226726T DE 69226726 T DE69226726 T DE 69226726T DE 69226726 D1 DE69226726 D1 DE 69226726D1
Authority
DE
Germany
Prior art keywords
detection
magnetic field
field changes
changes
magnetic
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 - Fee Related
Application number
DE69226726T
Other languages
English (en)
Other versions
DE69226726T2 (de
Inventor
James Richard Parkinson
Lisa B Maurice
William B Spillman
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.)
Simmonds Precision Products Inc
Original Assignee
Simmonds Precision Products Inc
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 US07/709,352 external-priority patent/US5214377A/en
Priority claimed from US07/709,627 external-priority patent/US5149962A/en
Application filed by Simmonds Precision Products Inc filed Critical Simmonds Precision Products Inc
Publication of DE69226726D1 publication Critical patent/DE69226726D1/de
Application granted granted Critical
Publication of DE69226726T2 publication Critical patent/DE69226726T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
    • G01R33/0322—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect using the Faraday or Voigt effect
    • 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
    • G01N33/26—Oils; viscous liquids; paints; inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
    • G01N33/2858—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel metal particles
    • 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
DE1992626726 1991-06-03 1992-06-02 Nachweis von Magnetfeldveränderungen Expired - Fee Related DE69226726T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/709,352 US5214377A (en) 1991-06-03 1991-06-03 Magnetic debris monitor using magneto-optic sending
US07/709,627 US5149962A (en) 1991-06-03 1991-06-03 Proximity detector using faraday effect and bidirectional transmission

Publications (2)

Publication Number Publication Date
DE69226726D1 true DE69226726D1 (de) 1998-10-01
DE69226726T2 DE69226726T2 (de) 1999-03-11

Family

ID=27108242

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1992626726 Expired - Fee Related DE69226726T2 (de) 1991-06-03 1992-06-02 Nachweis von Magnetfeldveränderungen

Country Status (2)

Country Link
EP (1) EP0517481B1 (de)
DE (1) DE69226726T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0610362D0 (en) * 2006-05-13 2006-07-05 Martin Graham Ferrous mass accumulation debris sensor
CN106094047B (zh) * 2016-08-17 2018-10-26 中国电子科技集团公司第二十九研究所 一种基于地磁异常探测的阵列式安检方法及装置
CN107421474B (zh) * 2017-04-25 2023-06-02 武汉中科创新技术股份有限公司 一种测量工件厚度的电磁超声测厚探头
CN112362540A (zh) * 2020-10-26 2021-02-12 重庆邮电大学 一种油液磨粒运动轨迹图像监测系统及检测方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029580B (en) * 1978-08-10 1983-06-15 Central Electr Generat Board Improvements in or relating to the collection and sensing of magnetic debris in lubricating oil and other liquids
US4219805A (en) * 1978-10-13 1980-08-26 Technical Development Company Lubricating oil debris monitoring system
SU924557A1 (ru) * 1980-06-13 1982-04-30 Тамбовское Высшее Военное Авиационное Инженерное Ордена Ленина Краснознаменное Училище Им.Ф.Э.Дзержинского Способ измерени концентрации ферромагнитных частиц в жидкости
JPS6276474A (ja) * 1985-09-30 1987-04-08 Mitsubishi Electric Corp 光応用計測装置
JPS6290547A (ja) * 1985-10-16 1987-04-25 Mitsubishi Electric Corp 光応用計測装置
US4947035A (en) * 1988-08-08 1990-08-07 Cornell Research Foundation, Inc. Fiber optic transducer using faraday effect
DE9015613U1 (de) * 1989-12-22 1991-01-31 Iveco Magirus Ag, 7900 Ulm, De

Also Published As

Publication number Publication date
EP0517481B1 (de) 1998-08-26
EP0517481A2 (de) 1992-12-09
DE69226726T2 (de) 1999-03-11
EP0517481A3 (en) 1993-09-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee