DE19854603A1 - Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity - Google Patents

Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity

Info

Publication number
DE19854603A1
DE19854603A1 DE1998154603 DE19854603A DE19854603A1 DE 19854603 A1 DE19854603 A1 DE 19854603A1 DE 1998154603 DE1998154603 DE 1998154603 DE 19854603 A DE19854603 A DE 19854603A DE 19854603 A1 DE19854603 A1 DE 19854603A1
Authority
DE
Germany
Prior art keywords
axle
magnetic field
sliding contacts
rotational velocity
measured
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.)
Ceased
Application number
DE1998154603
Other languages
German (de)
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 DE1998154603 priority Critical patent/DE19854603A1/en
Publication of DE19854603A1 publication Critical patent/DE19854603A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

When a metallic disk (1) rotates in a magnetic field (2) electrons are deflected. Use of sliding contacts (3,4) enables the voltage generated across the disk to be measured. The voltage is proportional to the rotational velocity and can be analyzed to determine rotational velocity.

Description

Es ist bekannt, mit einem Sensor sehr viele Impul­ se pro Umdrehung zu erzeugen, um aus den Zeitab­ ständen zwischen den Impulsen die Mittlere Dreh­ zahl oder die Momentandrehzahl zu ermitteln.It is known to have a lot of pulse with a sensor to generate per revolution in order to derive from the time the middle rotation would be between the impulses number or to determine the instantaneous speed.

Aber sowohl der Sensor, als auch die dazugehörige Elektronik sind kompliziert aufgebaut, so daß ein solches Meßgerät teuer ist.But both the sensor and the associated one Electronics are complex, so that a such meter is expensive.

Der im Patentanspruch angegebenen Erfindung liegt das Problem zugrunde, die Kosten eines Drehschwin­ gungsmeßgeräts zu senken.The invention specified in the claim lies underlying the problem, the cost of a rotary swivel lower measuring device.

Dieses Problem wird durch die im- Patentanspruch aufgeführten Merkmale gelöst.This problem is solved by the in-claim listed features solved.

Ein Ausführungsbeispiel ist in der Zeichnung dar­ gestellt, und wird im folgenden näher beschrieben.An embodiment is shown in the drawing and is described in more detail below.

Fig. 1 Eine sich drehende Metallscheibe im Magnet­ feld. Fig. 1 A rotating metal disc in the magnetic field.

Eine sich drehende Metallscheibe (1) befindet sich im Magnetfeld. Die Feldlinien verlaufen parallel zur Mittelachse. Aufgrund der Geschwindigkeit zwi­ schen Magnetfeld und Scheibe werden die Elektronen abgelenkt. Es entsteht eine Spannung zwischen Mittel­ punkt und Rand der Scheibe. Die Spannung wird über Schleifkontakte abgenommen. Sie ist der Drehzahl proportional. Die Drehschwingungen können so erfasst werden.A rotating metal disc ( 1 ) is in the magnetic field. The field lines run parallel to the central axis. The electrons are deflected due to the speed between the magnetic field and the disk. There is a tension between the center and the edge of the disc. The voltage is removed via sliding contacts. It is proportional to the speed. The torsional vibrations can be recorded in this way.

(1) Scheibe, (2) Magnetfeld, (3, 4) Schleifkontakte (5) Welle.( 1 ) disc, ( 2 ) magnetic field, ( 3 , 4 ) sliding contacts ( 5 ) shaft.

Claims (2)

Eine sich drehende Metallscheibe befindet sich im Magnetfeld. Die Feldlinien verlaufen parallel zur Mittelachse der Scheibe. Aufgrund der Geschwindigkeit der Elektronen im Metall entsteht wegen der Lorenz­ kraft eine Spannung zwischen Mittelpunkt und Rand der Scheibe. Diese Spannung ist proportional zur Drehzahl.A rotating metal disc is in the Magnetic field. The field lines run parallel to Central axis of the disc. Because of the speed the electrons in the metal are created because of Lorenz a tension between the center and the edge the disc. This voltage is proportional to Rotational speed. Dadurch gekennzeichnet, daß diese Spannung über Schleif­ kontakte abgenommen wird und für Analysezwecke zur Verfügung steht. Characterized in that this voltage is removed via sliding contacts and is available for analysis purposes.
DE1998154603 1998-11-26 1998-11-26 Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity Ceased DE19854603A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998154603 DE19854603A1 (en) 1998-11-26 1998-11-26 Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998154603 DE19854603A1 (en) 1998-11-26 1998-11-26 Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity

Publications (1)

Publication Number Publication Date
DE19854603A1 true DE19854603A1 (en) 2000-05-31

Family

ID=7889121

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998154603 Ceased DE19854603A1 (en) 1998-11-26 1998-11-26 Tachometer or other device to measure rpm; has metal disk mounted on axle placed in magnetic field parallel to axle, so that induced voltage between two sliding contacts can be measured to determine rotational velocity

Country Status (1)

Country Link
DE (1) DE19854603A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3341801C2 (en) * 1983-11-19 1989-07-13 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
US5237872A (en) * 1990-01-23 1993-08-24 Datawell B.V. Angular velocity sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3341801C2 (en) * 1983-11-19 1989-07-13 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
US5237872A (en) * 1990-01-23 1993-08-24 Datawell B.V. Angular velocity sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 10197544 A.,In: Patent Abstracts of Japan *

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8122 Nonbinding interest in granting licenses declared
8131 Rejection