GB1168861A - Ferrimagnetic Pressure Transducer - Google Patents

Ferrimagnetic Pressure Transducer

Info

Publication number
GB1168861A
GB1168861A GB232967A GB232967A GB1168861A GB 1168861 A GB1168861 A GB 1168861A GB 232967 A GB232967 A GB 232967A GB 232967 A GB232967 A GB 232967A GB 1168861 A GB1168861 A GB 1168861A
Authority
GB
United Kingdom
Prior art keywords
cores
pressure
core
ferrimagnetic
subjected
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
GB232967A
Inventor
Frank Friederick Stucki
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.)
Lockheed Corp
Original Assignee
Lockheed Aircraft Corp
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 Lockheed Aircraft Corp filed Critical Lockheed Aircraft Corp
Priority to GB232967A priority Critical patent/GB1168861A/en
Publication of GB1168861A publication Critical patent/GB1168861A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/16—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in the magnetic properties of material resulting from the application of stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

1,168,861. Pressure sensitive electrical transducers. LOCKHEED AIRCRAFT CORP. Jan.16, 1967, No. 2329/67. Heading G1N. [Also in Division H1] Differential pressure is measured by ferrimagnetic transducers 60, 70, Fig. 8 each comprising a ferrite core having a Curie temperature of at least 750‹ C to which cores unidirectional pressures P1, P2 are applied. Alternatively each core may be subjected to environmental hydrostatic pressure, or may be embedded in prestressed concrete to measure internal stresses therein. In the Fig. 8 embodiment the cores are energized from a pulse generator 12 feeding primary windings 34, 36. Secondary windings 40, 42 are connected in series opposition across a transformer primary 52 and an output voltage at transformer secondary 54 is representative of the pressure difference - one transducer may be subjected to a known pressure. The cores may have a composition of 0À5 Ni Fe 2 O 4 + 0À5 Fe 3 O 4 by weight or alternatively may include 0À1 lithium or cobalt with 0À49 Ni Fe 2 O 4 + 0À5 Fe 3 O 4 . A method of making the ferrite core with the desired characteristics is described. (See Group H1, Class H1H). Elevation of the Curie temperature to 750‹ C is said to enhance the stress sensitivity of the core.
GB232967A 1967-01-16 1967-01-16 Ferrimagnetic Pressure Transducer Expired GB1168861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB232967A GB1168861A (en) 1967-01-16 1967-01-16 Ferrimagnetic Pressure Transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB232967A GB1168861A (en) 1967-01-16 1967-01-16 Ferrimagnetic Pressure Transducer

Publications (1)

Publication Number Publication Date
GB1168861A true GB1168861A (en) 1969-10-29

Family

ID=9737629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB232967A Expired GB1168861A (en) 1967-01-16 1967-01-16 Ferrimagnetic Pressure Transducer

Country Status (1)

Country Link
GB (1) GB1168861A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156996A (en) * 1984-04-04 1985-10-16 Gen Electric Sensing pressure and controlling heat transfer systems
US4621503A (en) * 1984-04-04 1986-11-11 General Electric Company Pressure sensing devices and methods, control devices and methods of operating same, smart pressure switches, air conditioning systems and devices for controlling same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156996A (en) * 1984-04-04 1985-10-16 Gen Electric Sensing pressure and controlling heat transfer systems
US4621503A (en) * 1984-04-04 1986-11-11 General Electric Company Pressure sensing devices and methods, control devices and methods of operating same, smart pressure switches, air conditioning systems and devices for controlling same

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