GB2243221A - Measuring and displaying time varying magnetic phenomena - Google Patents

Measuring and displaying time varying magnetic phenomena Download PDF

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Publication number
GB2243221A
GB2243221A GB9008611A GB9008611A GB2243221A GB 2243221 A GB2243221 A GB 2243221A GB 9008611 A GB9008611 A GB 9008611A GB 9008611 A GB9008611 A GB 9008611A GB 2243221 A GB2243221 A GB 2243221A
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GB
United Kingdom
Prior art keywords
time varying
measuring
varying magnetic
magnetic phenomena
displaying time
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.)
Withdrawn
Application number
GB9008611A
Other versions
GB9008611D0 (en
Inventor
John Dudding
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9008611A priority Critical patent/GB2243221A/en
Publication of GB9008611D0 publication Critical patent/GB9008611D0/en
Publication of GB2243221A publication Critical patent/GB2243221A/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

A single apparatus includes a graphical display in the form of a Liquid Crystal Display, Cathode Ray Tube or some such device in order to measure and display the time varying characteristics of magnetic phenomena detected by a suitable and separate transducers. <IMAGE>

Description

AN APPARATUS FOR MEASURING AND DISPLAYING TIMEVARYING MAGNETIC PHENOMENA THE PRESENT INVENTION RELATES TO THE MEASUREMENT AND DISPLAYING OF TIME VARYING MAGNETIC PHENOMENA IN THE GENERAL EMBODIMENT OF A SINGLE APPARATUS.
Magnetic field strength, Magnetic Flux ano related magnetic phenomena, such as magnetic flux density, can be measured by a variety ot known apparatus.
By means of some output device, such as a an@@@ogue moving coi! meter or digital meter, a value of te p@@perty measured is indicated.
On previous embodiments of such instruments the output has been limited to indicating a single or 1 imteo number of measurements at a particular moment in time.
Concidering such instruments, in the case of what is frequent called a tc. measurement, aa- measurement of a statie, that is non changing, magnet measurement takes place.
The indication relates to the property being measured at that moment in time. allowing for delays witnir tne operation of the instrument.
In the case o what is frequently aesor ihes es an "AC" measurement, a measurement of a repeating oscillating magnetic property takes place. The indication relates to the measurement et that moment to the stat@@ equiva@ent of the alternating waveform averaged over a @@@ eveles. The measurement gives little indication of the shape of the alternating waveform.
In the case of what is frequently described as a Peak measurement the indication relates to the pignest, or lowest.
reading experienced by an instrument during a given period.
Measurement and displaying time varying magnetic phenomena is feasible by designing a system basec up In individual known apparatus.
The present invention relates t a general embociment of a single apparatus and a separate transducer, to measure and indicate time varying magnetic phenomena.
According to one embodiment of the present invert ion a Hal I effect device forms a transducer. This is connected to an instrument equipped with signal procession e ectronic cuitry compatible with the said transducer together with some form of graphical display such as s l liquio @ crystal graphics display, cathode ray tube or some suor item of prior art.
As the Hall effect device experiences time varying magnetic phenomena. the apparatus will be recorded end di slaved as a graph with a time dependent axis. The data can be recorded and displayed se a contunuity of date @@@@@ @@@ p@@urality of points.
n another embodiment a coil may for@@@ a @@@@@@er connected to a similar apparatus.
Figure 1 is a diagram illustrating one possible embodiment of the present invention.
A transducer is connected to signal processing electronic circuitry . This circuitry is designed to be compatible with the signals produced and required by the transducer and is not of a general form.
The output of the signal processing electrenic circuitry is supplied to an analogue to digital converter which digitises the signal for the microprocessor to process. This outputs the data to a graphic display iiquid crystal display.
The display shows a graph of magnetic lux density displayed against a time based axis. From this graph, ma magnetic flux density values or other data can be extracted by the operat;D

Claims (2)

  1. CLAIMS: 1. A single apparatus that is capable of measuring and displaying magnetic phenomena upon a time based display.
  2. 2. A single apparatus as claimed in (1) where in the time dependent variations in Magnetic Flux Density using a Hall effect flux gate, magneto resistive or other transducer can be measured and displayed.
    a. A single apparatus as claimed in (1) where in the time depended variations in Magnetic Flux Linkage variations using a search coil as a transducer can be measured and displayed.
GB9008611A 1990-04-17 1990-04-17 Measuring and displaying time varying magnetic phenomena Withdrawn GB2243221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9008611A GB2243221A (en) 1990-04-17 1990-04-17 Measuring and displaying time varying magnetic phenomena

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9008611A GB2243221A (en) 1990-04-17 1990-04-17 Measuring and displaying time varying magnetic phenomena

Publications (2)

Publication Number Publication Date
GB9008611D0 GB9008611D0 (en) 1990-06-13
GB2243221A true GB2243221A (en) 1991-10-23

Family

ID=10674537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9008611A Withdrawn GB2243221A (en) 1990-04-17 1990-04-17 Measuring and displaying time varying magnetic phenomena

Country Status (1)

Country Link
GB (1) GB2243221A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1200146A (en) * 1967-08-17 1970-07-29 Friedrich M O Foerster Measuring magnetic fields
US3693085A (en) * 1971-07-15 1972-09-19 Gen Motors Corp System for calibrated high level current measurement using a magnetic field responsive transistor
EP0019827A1 (en) * 1979-05-28 1980-12-10 Siemens Aktiengesellschaft Arrangement for detecting the field strength of a field generator by means of a Hall generator
US4769599A (en) * 1986-03-03 1988-09-06 Geo-Centers, Inc. Magnetometer with magnetostrictive member of stress variable magnetic permeability
GB2218817A (en) * 1987-12-29 1989-11-22 Eaton Corp Magneto-resistive current sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1200146A (en) * 1967-08-17 1970-07-29 Friedrich M O Foerster Measuring magnetic fields
US3693085A (en) * 1971-07-15 1972-09-19 Gen Motors Corp System for calibrated high level current measurement using a magnetic field responsive transistor
EP0019827A1 (en) * 1979-05-28 1980-12-10 Siemens Aktiengesellschaft Arrangement for detecting the field strength of a field generator by means of a Hall generator
US4769599A (en) * 1986-03-03 1988-09-06 Geo-Centers, Inc. Magnetometer with magnetostrictive member of stress variable magnetic permeability
GB2218817A (en) * 1987-12-29 1989-11-22 Eaton Corp Magneto-resistive current sensor

Also Published As

Publication number Publication date
GB9008611D0 (en) 1990-06-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)