DE4210905A1 - Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field - Google Patents

Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field

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Publication number
DE4210905A1
DE4210905A1 DE19924210905 DE4210905A DE4210905A1 DE 4210905 A1 DE4210905 A1 DE 4210905A1 DE 19924210905 DE19924210905 DE 19924210905 DE 4210905 A DE4210905 A DE 4210905A DE 4210905 A1 DE4210905 A1 DE 4210905A1
Authority
DE
Germany
Prior art keywords
magnetic field
sensor
strength
signal proportional
signal
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Withdrawn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
DE19924210905
Other languages
German (de)
Inventor
Erich Dr Steingroever
Dietrich Steingroever
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.)
Magnet Physik Dr Steingroever GmbH
Original Assignee
Magnet Physik Dr Steingroever GmbH
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 Magnet Physik Dr Steingroever GmbH filed Critical Magnet Physik Dr Steingroever GmbH
Priority to DE19924210905 priority Critical patent/DE4210905A1/en
Publication of DE4210905A1 publication Critical patent/DE4210905A1/en
Withdrawn legal-status Critical Current

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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

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

Abstract

The magnetic field indicator has a magnetic field-dependent sensor which generates a signal proportional to the intensity or direction of the magnetic field. This signal is converted into an acoustic signal whose frequency is controlled. The device may produce a low frequency tone to indicate a weak magnetic field, and a high frequency tone to indicate a strong field, e.g. using an amplitude/frequency converter. USE/ADVANTAGE - For stray field analysis of telecommunications appts., tomographs, television sets, electronic scales, determining switching state of electromagnets in protective relays and high current conductors, indication of layer thickness in magnetic or inductive thickness meters. Simple operation.

Description

Die Erfindung betrifft ein Verfahren und nach diesem arbeitende Geräte zum Anzeigen und Prüfen von magnetischen Feldern und von Geräten, die magnetfeld-abhängige Teile enthalten.The invention relates to a method and working according to this Devices for the display and testing of magnetic fields and of Devices that contain magnetic field-dependent parts.

Magnetfeld-Sensoren mit Anzeige der gemessenen Werte auf einer Skala, analog oder digital, sind bekannt. Es sind zum Beispiel Hallsonden, magnetfeld-abhängige Widerstände und Flußmeßspulen, die ein elektrisches Signal entsprechend den Stärken des Magnetfeldes, dem sie ausgesetzt werden, abgeben. Dieses wird zur Anzeige gebracht oder zur späteren Auswertung gespeichert.Magnetic field sensors with display of the measured values on a Scales, analog or digital, are known. For example it is Hall probes, magnetic field-dependent resistors and flux measuring coils, an electrical signal corresponding to the strengths of the magnetic field, to which they are exposed. This becomes a display brought or saved for later evaluation.

Die Erfindung besteht darin, daß das Signal eines Magnetfeld-Sensors in ein akustisches Signal umgewandelt wird und daß die Tonhöhe von dem Signal des Magnetfeld-Sensors gesteuert wird. Zum Beispiel kann so verfahren werden, daß ein schwaches Magnetfeld durch einen Ton von niedriger Frequenz angezeigt wird, ein starkes durch einen hohen Ton.The invention is that the signal of a magnetic field sensor is converted into an acoustic signal and that the pitch is controlled by the signal of the magnetic field sensor. For example can be operated in such a way that a weak magnetic field is caused by a sound of low frequency is displayed, a strong one a high note.

Da das menschliche Ohr in einem weiten Frequenzbereich empfindlich ist, etwa von 20 Hz bis 20 000 Hz, kann mit dem erfindungsgemäßen Verfahren auch ein ebenso weiter Bereich des Magnetfeldes erfaßt werden, also etwa von 1 mT bis 1000 mT oder von 0,01 mT bis 10 mT. Dabei ist 1 mT = 1 Millitesla = 10 Gauß.Because the human ear is sensitive in a wide frequency range is, from about 20 Hz to 20,000 Hz, can with the invention The method also covers an equally wide area of the magnetic field  be from about 1 mT to 1000 mT or from 0.01 mT to 10 mT. 1 mT = 1 millitesla = 10 gauss.

Ein Gerät nach der Erfindung besteht aus:A device according to the invention consists of:

  • - einem magnetfeldempfindlichen Sensor der oben genannten oder anderer bekannten Art,- A magnetic field sensitive sensor of the above or other known type,
  • - einer Auswerteschaltung, die ein der Stärke des Magnetfeldes entsprechendes Signal abgibt,- An evaluation circuit, the one of the strength of the magnetic field emits the corresponding signal,
  • - einem Analog/Frequenzwandler- an analog / frequency converter
  • - und aus einem elektroakustischen Wandler, z. B. Lautsprecher oder Telefonhörer.- And from an electroacoustic transducer, for. B. speakers or telephone receiver.

Mit einem erfindungsgemäßen Gerät kann besonders leicht ein Magnetfeld gefunden oder seine Richtung festgestellt werden.With a device according to the invention, it can be particularly easy Magnetic field found or its direction can be determined.

Anwendungsbeispiele sind:Application examples are:

  • - Streufelduntersuchungen an Fernmeldegeräten,- stray field studies on telecommunications equipment,
  • - Tomographen mit Magnetfeld, Fernsehgeräte, elektronische Waagen, Feststellung der Schaltzustände von Elektromagneten, z. B. in Schützen und Relais, von Hochstromleitern, Anzeige von Schichtdicken bei magnetischen oder induktiven Schichtdicken-Messern.- Magnetic field tomographs, televisions, electronic Scales, determination of the switching states of electromagnets, e.g. B. in contactors and relays, of high-current conductors, Display of layer thicknesses with magnetic or inductive Layer thickness knives.

Bei letzterem ist es besonders leicht, die Fläche einer Schicht abzufahren und durch Tonhöhenveränderung mögliche Dickenunterschiede oder Fehlstellen in der Schicht zu finden.In the latter, it is particularly easy to cover the area of a layer to travel and possible differences in thickness by changing the pitch or to find defects in the layer.

Ein nach der Erfindung arbeitendes Gerät ist in Fig. 1 dargestellt. Darin sind:A device operating according to the invention is shown in FIG. 1. In it are:

1 ein magnetfeldempfindlicher Sensor, der möglicherweise versenkbar in der Spitze eines Halters angebracht ist,
2 ein Gehäuse für die elektrische Meß- und Auswerteschaltung und eine Batterie,
3 eine Öffnung für einen Lautsprecher,
4 ein Schalter für Ein/Aus,
5 und 6 zwei Leuchtdioden zum Anzeigen der Polarität des Magnetfeldes bei Gleichfeldern,
7 die im Inneren des Gehäuses befindliche Elektronik,
8 die im Inneren befindliche Batterie. 1 a magnetic field sensitive sensor, which may be retractable in the tip of a holder,
2 a housing for the electrical measuring and evaluation circuit and a battery,
3 an opening for a loudspeaker,
4 a switch for on / off,
5 and 6 two light-emitting diodes for indicating the polarity of the magnetic field in the case of constant fields,
7 the electronics located inside the housing,
8 the battery inside.

Claims (4)

1. Magnetfeld-Anzeiger für die Stärke und/oder Richtung von Magnetfeldern mit einem magnetfeld-abhängigen Sensor, der eine der Stärke bzw. Richtung eines Magnetfeldes proportionales Signal abgibt, dadurch gekennzeichnet, daß das Signal in ein akustisches umgewandelt wird und daß die Tonhöhe von dem Signal gesteuert wird.1. Magnetic field indicator for the strength and / or direction of magnetic fields with a magnetic field-dependent sensor that emits a signal proportional to the strength or direction of a magnetic field, characterized in that the signal is converted into an acoustic and that the pitch of the signal is controlled. 2. Verwendung von Magnetfeld-Anzeigern nach Anspruch 1 für die Untersuchung von Streufeldern von elektro- und/oder permanent-magnetischen Geräten.2. Use of magnetic field indicators according to claim 1 for the investigation of stray fields from electromagnetic and / or permanent magnetic Devices. 3. Verwendung von Magnetfeld-Anzeigern nach Anspruch 1 für die Untersuchung des Magnetfeldes in der Umgebung von elektrischen Leitern.3. Use of magnetic field indicators according to claim 1 for the investigation of the magnetic field in the vicinity of electrical Ladders. 4. Verwendung von Magnetfeld-Anzeigern nach Anspruch 1 für die Untersuchung von Schichtdicken mit magnetfeld-abhängigen Schichtdickenmessern.4. Use of magnetic field indicators according to claim 1 for the investigation of layer thicknesses with magnetic field dependent layer thickness meters.
DE19924210905 1992-04-02 1992-04-02 Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field Withdrawn DE4210905A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924210905 DE4210905A1 (en) 1992-04-02 1992-04-02 Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924210905 DE4210905A1 (en) 1992-04-02 1992-04-02 Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field

Publications (1)

Publication Number Publication Date
DE4210905A1 true DE4210905A1 (en) 1993-10-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924210905 Withdrawn DE4210905A1 (en) 1992-04-02 1992-04-02 Magnetic field sensor with acoustic indicator - uses magnetic field dependent sensor which transmits acoustic signal proportional to strength or direction of magnetic field

Country Status (1)

Country Link
DE (1) DE4210905A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701753A1 (en) * 1997-01-20 1998-07-23 Aichinger Helmuth Magnetic field change tracker for electrical disturbance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025511B (en) * 1954-09-20 1958-03-06 Siemens Ag Probe for detecting magnetic fields with a semiconducting, plaque-shaped envelope voltage generator
DE3124255C2 (en) * 1980-06-24 1985-05-09 Schonstedt Instrument Co., Reston, Va. Magnetic sensor device
DE3631064A1 (en) * 1986-09-12 1988-03-24 Licentia Gmbh Probe for detecting direct and alternating magnetic fields

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025511B (en) * 1954-09-20 1958-03-06 Siemens Ag Probe for detecting magnetic fields with a semiconducting, plaque-shaped envelope voltage generator
DE3124255C2 (en) * 1980-06-24 1985-05-09 Schonstedt Instrument Co., Reston, Va. Magnetic sensor device
DE3631064A1 (en) * 1986-09-12 1988-03-24 Licentia Gmbh Probe for detecting direct and alternating magnetic fields

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Auf dem Weg zum Vollautomaten. In: Funkschau, H.8, 1984, S.37-39 *
DEUTSCH, Volker: Neue Entwicklungen auf dem Gebietder magnetischen Schichtdickenmessung. In: Elek- tronik, H.6, 1959, S.187-188 *
Prospekt: Eisendetektor Modell EW 1504, Vallon GmbH, im Grund 3, 7412 Eningen u.A., West Germany *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701753A1 (en) * 1997-01-20 1998-07-23 Aichinger Helmuth Magnetic field change tracker for electrical disturbance

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8141 Disposal/no request for examination