DE20310026U1 - Magnetically-operated cylinder switch for monitoring hydraulic actuator has magnetic field sensor on circuit board in housing, arranged in direction of polar axis of magnetic field from piston magnet - Google Patents
Magnetically-operated cylinder switch for monitoring hydraulic actuator has magnetic field sensor on circuit board in housing, arranged in direction of polar axis of magnetic field from piston magnetInfo
- Publication number
- DE20310026U1 DE20310026U1 DE20310026U DE20310026U DE20310026U1 DE 20310026 U1 DE20310026 U1 DE 20310026U1 DE 20310026 U DE20310026 U DE 20310026U DE 20310026 U DE20310026 U DE 20310026U DE 20310026 U1 DE20310026 U1 DE 20310026U1
- Authority
- DE
- Germany
- Prior art keywords
- magnetic field
- sensor
- field sensor
- circuit board
- cylinder switch
- 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims 2
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Beschreibung Magnetischer ZylinderschalterDescription Magnetic cylinder switch
Die Erfindung bezieht sich auf einen magnetisch zu betätigenden Zylinderschalter mit den im Oberbegriff des Schutzanspruchs 1 angegebenen Merkmalen.The invention relates to a magnetically actuated cylinder switch with the features specified in the preamble of claim 1.
In dieser Beziehung wird der axial bewegliche Arbeitskolben einer Zylinderanordnung mit einem Permanentmagneten belegt, dessen Magnetfeld durch die nicht magnetische Außenwandung des Druckzylinders auf einen an ihm fest positionierten Magnetfeldsensor wirkt, um damit nachgeordnete Schalteinrichtungen zur Erfassung der jeweils vorhandenen Position des Arbeitskolbens zu beeinflussen.In this respect, the axially movable working piston of a cylinder arrangement is provided with a permanent magnet, the magnetic field of which acts through the non-magnetic outer wall of the pressure cylinder onto a magnetic field sensor fixedly positioned on it in order to influence downstream switching devices for detecting the respective existing position of the working piston.
Bekannte Anordnungen dieser Gattung verwenden hierzu kolbenseitig einen axial magnetisierten Ringmagneten, der durch die Zylinderwandung berührungslos mit einem ebenso axial orientierten Sensorelement zusammenwirkt. Derartige Ausfuhrungen sind jedoch an die Verwendung eines Arbeitskolbens aus einem nicht magnetischen Material gebunden, da sich die Feldlinien des axial polarisierten Permanentmagneten sonst über einen beispielsweise für höhere Drücke erforderlichen Stahlkolben im wesentlichen kurzschließen würden und somit für die Betätigung des zugeordneten Sensorelements ausfielen.Known arrangements of this type use an axially magnetized ring magnet on the piston side, which interacts with an equally axially oriented sensor element through the cylinder wall without contact. However, such designs are bound to the use of a working piston made of a non-magnetic material, since the field lines of the axially polarized permanent magnet would otherwise essentially short-circuit via a steel piston, which is required for higher pressures, for example, and would therefore not be able to actuate the associated sensor element.
Andererseits ist eine Anordnung radial magnetisierter Kolbenmagnetringe bezüglich der Erfassungsrichtung und mit Rücksicht auf eine eindeutige Schaltcharakteristik an die Verwendung eines gleicherweise radial polarisierten und demgemäß räumlich von dem Druckzylinder nach außen hin abstehenden Sensorelements gebunden, wozu in der Praxis häufig der erforderliche Montageraum fehlt.On the other hand, an arrangement of radially magnetized piston magnet rings is tied to the use of a sensor element that is equally radially polarized and therefore spatially protrudes outward from the pressure cylinder with regard to the detection direction and with regard to a clear switching characteristic, for which the necessary installation space is often lacking in practice.
In Anbetracht dessen liegt der Erfindung die Aufgabe zugrunde, das mit einem radial ausgerichteten Kolbenmagnetfeld korrespondierende Sensorelement, wie bisher, innerhalb eines dem Druckzylinder außenseitig axial zugeordneten Gehäuses in Hülsenformat unterzubringen und dabei störende Mehrfachschaltbereiche sicher zu vermeiden.In view of this, the invention is based on the object of accommodating the sensor element corresponding to a radially aligned piston magnetic field, as previously, within a housing in sleeve format axially assigned to the outside of the pressure cylinder and thereby safely avoiding disturbing multiple switching areas.
Zur Lösung dieser Aufgabe ist bei einem magnetischen Zylinderschalter nach dem Oberbegriff des Schutzanspruchs 1 vorgesehen, daß sich der Magnetfeldsensor innerhalb eines hülsenförmigen Schaltergehäuses auf einer im installierten Zustand in Richtung der Polachse des radial orientierten Kolbenmagnetfeldes weisenden Abwinklung an der für die gedruckte Sensorschaltung vorhandenen Trägerplatine befindet.To solve this problem, in a magnetic cylinder switch according to the preamble of claim 1, it is provided that the magnetic field sensor is located within a sleeve-shaped switch housing on an angled portion on the carrier board for the printed sensor circuit, which bend points in the direction of the polar axis of the radially oriented piston magnetic field when installed.
Dabei handelt es sich bei dem umkapselten Magnetfeldsensor z.B. bekannterweise um eine in Erfassungsrichtung mit einem hochpermeablen Metallglasstreifen belegte Schwingkreisspule eines HF-Oszillators. Ebenso kann das magnetempfindliche Element aber auch in Form einer Hallsonde, eines magnetoresistiven Sensors oder einfach als Schutzrohrkontakt ausgebildet sein.The encapsulated magnetic field sensor is, for example, a resonant circuit coil of an RF oscillator covered with a highly permeable metal-glass strip in the detection direction. The magnetically sensitive element can also be designed in the form of a Hall probe, a magnetoresistive sensor or simply as a protective tube contact.
Auf diese Weise ist es möglich, auch die Bewegungsvorgänge ferromagnetischer Arbeitskolben in hydraulischen Hochdrucksystemen exakt zu erfassen, ohne dabei in praxi den dafür bisher inkaufgenommenen Platzbedarf zu überschreiten.In this way, it is possible to precisely record the movement processes of ferromagnetic working pistons in hydraulic high-pressure systems without exceeding the space requirements previously accepted for this purpose.
Zweckmäßige Ausführungen und vorteilhafte Weiterbildungen der Erfindung sind aus den nachgeortneten Unteransprüchen ersichtlich und im einzelnen bezüglich ihrerAppropriate embodiments and advantageous developments of the invention are apparent from the subclaims below and are described in detail with regard to their
.:Seitßlyoii4.... .... ... : Seitßlyoii4.... .... ..
gegenständlichen Merkmale dem Fachmann in Anbetracht der vorbezeichneten Ausfuhrungsform ohne zusätzliche Erläuterung verständlich.The subject features are understandable to the person skilled in the art in view of the above-mentioned embodiment without additional explanation.
In der anliegenden Zeichnung ist als Ausfuhrungsbeispiel der Erfindung ein magnetischer Zylinderschalter dargestellt, welcher mit der Unterseite seines quaderförmigen Gehäuses 1 an der Außenwandung eines Druckzylinders achsparallel zu der Bewegungsrichtung eines radial magnetisierten Arbeitskolbens funktionsgemäß zu positionieren ist.In the attached drawing, a magnetic cylinder switch is shown as an exemplary embodiment of the invention, which is to be functionally positioned with the underside of its cuboid-shaped housing 1 on the outer wall of a pressure cylinder axially parallel to the direction of movement of a radially magnetized working piston.
Wie aus der gehäuseseitig teilweise gebrochenen Darstellung ersichtlich, ist die mit den elektronischen Bauelementen der Sensorschaltung bestückte Trägerplatine innerhalb des Gehäuses 1 als gedruckte Leiterplatte 2 dem Beispiel gemäß an ihrem vorderen Ende im Ansatz mit einer Abwinklung versehen, die in montiertem Zustand des Sensors rechtwinklig von der Leiterplatte 2 in Richtung der Zylinderachse absteht. Auf diese Weise wird mit Vorteil erreicht, daß sich ein auf der genannten Abwinklung angebrachter Magnetfeldsensor 3 polparallel zu einem zylinderseitig radial ausgerichteten Kolbenmagnetfeld verhält.As can be seen from the partially broken view on the housing side, the carrier board fitted with the electronic components of the sensor circuit within the housing 1 as a printed circuit board 2 is provided with an angled portion at its front end according to the example, which protrudes at right angles from the circuit board 2 in the direction of the cylinder axis when the sensor is mounted. In this way, it is advantageously achieved that a magnetic field sensor 3 mounted on the angled portion behaves in a pole-parallel manner to a piston magnetic field that is radially aligned on the cylinder side.
Des weiteren kann die Abwinklung als Träger für den Magnetfeldsensor 3 ebenso an anderer Stelle der Leiterplatte 2 im Bereich der elektronischen Bauelemente oder auch an der Unterseite der gedruckten Leiterplatte 2 angesetzt werden, um den Magnetfeldsensor 3 gleichpolig auf das Radialmagnetfeld des Arbeitskolbens auszurichten.Furthermore, the bend as a carrier for the magnetic field sensor 3 can also be attached at another location on the circuit board 2 in the area of the electronic components or on the underside of the printed circuit board 2 in order to align the magnetic field sensor 3 with the same polarity to the radial magnetic field of the working piston.
Dabei handelt es sich bei dem erfindungsgemäßen Magnetfeldsensor 3 je nach Erfordernis um die Schwingkreisspule eines HF-Oszillators, eine Hallsonde, einen magnetoresistiven Sensor oder einfach um einen Schutzrohrkontakt.Depending on the requirements, the magnetic field sensor 3 according to the invention is the resonant circuit coil of an RF oscillator, a Hall probe, a magnetoresistive sensor or simply a protective tube contact.
3 Schutzansprüche
1 Blatt Zeichnung3 Protection claims
1 sheet drawing
•Seit» 2 von 4 ·.•Since» 2 of 4 ·.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20310026U DE20310026U1 (en) | 2003-06-28 | 2003-06-28 | Magnetically-operated cylinder switch for monitoring hydraulic actuator has magnetic field sensor on circuit board in housing, arranged in direction of polar axis of magnetic field from piston magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20310026U DE20310026U1 (en) | 2003-06-28 | 2003-06-28 | Magnetically-operated cylinder switch for monitoring hydraulic actuator has magnetic field sensor on circuit board in housing, arranged in direction of polar axis of magnetic field from piston magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20310026U1 true DE20310026U1 (en) | 2003-10-23 |
Family
ID=29285881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20310026U Expired - Lifetime DE20310026U1 (en) | 2003-06-28 | 2003-06-28 | Magnetically-operated cylinder switch for monitoring hydraulic actuator has magnetic field sensor on circuit board in housing, arranged in direction of polar axis of magnetic field from piston magnet |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20310026U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014223884A1 (en) * | 2014-11-24 | 2016-05-25 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor arrangement and method for determining a position and / or a position change of a measurement object |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69000218T2 (en) * | 1989-09-05 | 1993-03-25 | Philippe Robert Louis Roudaut | PISTON-CYLINDER UNIT WITH A DEVICE FOR DETERMINING AND CONFIRMING THE PISTON POSITION. |
| DE19523322C2 (en) * | 1995-06-20 | 1999-03-04 | Mitsubishi Electric Corp | Rotary sensor device and associated manufacturing method |
| DE19743541C2 (en) * | 1997-02-25 | 2000-02-24 | Mitsubishi Electric Corp | Magnetic field sensor |
-
2003
- 2003-06-28 DE DE20310026U patent/DE20310026U1/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69000218T2 (en) * | 1989-09-05 | 1993-03-25 | Philippe Robert Louis Roudaut | PISTON-CYLINDER UNIT WITH A DEVICE FOR DETERMINING AND CONFIRMING THE PISTON POSITION. |
| DE19523322C2 (en) * | 1995-06-20 | 1999-03-04 | Mitsubishi Electric Corp | Rotary sensor device and associated manufacturing method |
| DE19743541C2 (en) * | 1997-02-25 | 2000-02-24 | Mitsubishi Electric Corp | Magnetic field sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014223884A1 (en) * | 2014-11-24 | 2016-05-25 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor arrangement and method for determining a position and / or a position change of a measurement object |
| US10502591B2 (en) | 2014-11-24 | 2019-12-10 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor arrangement and method for determining a position and/or a change in the position of a measurement object |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R163 | Identified publications notified | ||
| R207 | Utility model specification |
Effective date: 20031127 |
|
| R156 | Lapse of ip right after 3 years |
Effective date: 20070103 |