EP0727037A1 - Device for linear measurement along a link chain - Google Patents

Device for linear measurement along a link chain

Info

Publication number
EP0727037A1
EP0727037A1 EP95901318A EP95901318A EP0727037A1 EP 0727037 A1 EP0727037 A1 EP 0727037A1 EP 95901318 A EP95901318 A EP 95901318A EP 95901318 A EP95901318 A EP 95901318A EP 0727037 A1 EP0727037 A1 EP 0727037A1
Authority
EP
European Patent Office
Prior art keywords
chain
detector
links
induction coils
evaluation
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Withdrawn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
EP95901318A
Other languages
German (de)
French (fr)
Inventor
Robert Thalhammer
Adolf Appel
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
Publication of EP0727037A1 publication Critical patent/EP0727037A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/026—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring length of cable, band or the like, which has been paid out, e.g. from a reel
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/04—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B7/042—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
    • G01B7/046—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length using magnetic means
    • 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
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • 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
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders

Definitions

  • the invention relates to a device for measuring the length of a chain formed by individual links by means of a counter which can be actuated by the chain.
  • a device for length measurement on a chain is e.g. made known by WO 91/12486.
  • the chain is then guided over a sprocket that is provided with a magnetically active element.
  • a stationary magnetic sensor is attached to a geared motor housing opposite the orbit of the element.
  • the sensor contains a reed contact, which changes its switching position when the element slides past and thus generates an electrical pulse that is transmitted to an evaluation and display device that calculates and displays the length of the chain section transported from the number of revolutions of the chain wheel detected .
  • the winch has a sprocket over which the chain runs non-slip.
  • a magnet is connected to the sprocket.
  • a stationary sensor is located in the effective area of the magnet and is excited by it as it slides past.
  • counting pulses which reflect the number of revolutions.
  • the diameter of the chain wheel must be taken into account when converting the counting pulses into a length dimension. Because of this dependency, an individually coordinated counting device must be used for each diameter. Because of the uncertainty regarding the diameter of the chain wheel, the counting device is hardly suitable for retrofitting existing chain drives.
  • US Pat. No. 5,233,294 has disclosed a metal sensor with a sensor wire which is surrounded by an electromagnetic field and which changes when it approaches metal.
  • a length measuring device has, for example, a chain-like metal strip which consists of two side strips and a large number of transverse connecting webs with the same spacing.
  • the sensor wire is arranged parallel to the crossbars near the metal strip. When passing a crossbar, the change in the electromagnetic field is determined.
  • DE 35 24 338 AI is a device for monitoring wear in an endless chain
  • Trough chain conveyor became known.
  • the chain is then provided with transverse drivers which are at a defined distance from one another.
  • Two fixed sensors are arranged in an integral multiple of the pitch of the chain links, scan the drivers and influence a signal transmitter. This makes it possible to determine a change in distance between the drivers due to wear.
  • a plumb bob device for determining the dumping height in a shaft furnace with a traction means wound on a drum has become known from DE 9004520 U1.
  • a displacement sensor driven by the drum shaft shows the length of the unwound section of the traction device and thus the height of the bulk material in the furnace.
  • the invention has for its object to provide a device that enables an accurate length measurement on the anchor chain regardless of different drive conditions.
  • the detector Since the detector now scans and counts the links directly, the length measurement is independent of the drive means for the chain. It is possible to adjust the evaluation device to the spacing between the links, without the need for mechanical measures. It is it is also possible to mount the detector at a suitable point independently of the drive device. It can be kept very compact and can therefore easily be retrofitted into existing chain hoists.
  • the senor can e.g. B. be designed as a magnetic sensor whose magnetic field can be changed relative to the sensor depending on the position of the individual members. When the limbs slide past, this change can be electrically detected and evaluated accordingly.
  • the means for adjusting the pitch can be designed particularly advantageously as DIP switches, coding plugs or solder bridges to be separated. They enable the evaluation device to be set in a simple manner to the different standardized pitch spacings of different chain types. The setting is made when installing the sensor e.g. by specialist personnel or by means of instructions from the user himself. When the chain is replaced, the evaluation device can easily be set to a different pitch.
  • the detector receives an active scanning, which is suitable for any metallic, even non-magnetic material, even if the chain is very dirty.
  • the guide body according to claims 9 and 10 can easily in different ways at different locations on the yacht e.g. be installed in the inlet area of a chain case.
  • the cross-shaped opening adapted to the chain contour prevents the chain from twisting and swallowing when it is pulled in. It can then be easily pulled out again.
  • the development according to claim 11 combines low frictional forces with a long service life and avoids any risk of corrosion.
  • the entire detector electrical system can easily be inserted into the guide body and hermetically sealed in it by casting.
  • the development according to claim 12 can be easily implemented, for example, by differently marked lamps. Due to the development according to claim 13, the device for length measurement consists of only two different functional units.
  • the development according to claim 14 is particularly suitable for yachts with a remote chain drive from the steering position.
  • the development according to claim 15 makes it possible to place the device in the vicinity of the windlass and this e.g. operated by hand.
  • the measured value can remain stored by the buffer battery according to claim 16, even if the device is brought to another connection in the meantime.
  • the chain drive and the length measuring device can be combined in a user-friendly manner.
  • FIG. 1 shows a perspective view of a device for length measurement on a chain with a detector and a display and evaluation device for fixed installation in a control station
  • FIG. 2 shows a measuring device as in FIG. 1, but with a portable display and evaluation device
  • FIG. 3 a plan view of the detector of Fig.l and 2
  • FIG. 4 shows a perspective view of the detector according to FIG. 2 with electronic components, which are shown schematically in the manner of an exploded drawing
  • FIG. 5 schematically shows a section through the detector according to FIG. 4 with the electronic components used.
  • a detector .1 for scanning links in a chain 2 has a ring-like guide body 3 which contains electromagnetic scanning means.
  • the detector is connected via a line 4 to an evaluation and display device combined to form a device 5.
  • the device 5 is provided with a display 6 for displaying the measured lengths. It also has a reset button 7, by means of which the initial position of the chain can be marked with the value 0.
  • control lamps 8 are provided for indicating the direction of movement.
  • the evaluation and display device is implemented in a portable hand-held device 9 that is connected to the detector 1 via an extended line 4. It has a buffer battery for storing the measured values independently of the network.
  • the detector 1 has an essentially cylindrical flange-like guide body 10 with a central opening 11 which is provided with coaxial grooves which are adapted to the cross-sectional contour of the chain. Transversely opposite receiving spaces 12 are also provided in the guide body for two electronic assemblies 13 and connecting wires 14, which connect the assemblies to one another and to a connector for connecting the line 4.
  • the assemblies 13 have, on the inside facing the opening 11, two pairs of induction coils 16 one behind the other in the axial direction, of which the ones labeled A and B are fed from a common feed line.
  • the induction coils generate electromagnetic fields 17 which are so strongly damped by immersing members that the feed current increases. From this change, the detector circuit mounted on the module 13 generates a counting pulse which is transmitted via the Plug connector 15 and line 4 (FIG. 1) of the evaluation device in device 5 are transmitted.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

Up to now, the extent to which a link chain, e.g. for a yacht anchor, has been payed out has been determined by measuring revolutions on a chain wheel. According to the invention, the chain passes through a sensor which uses a high-frequency electrical field to detect the individual links and sends corresponding counting pulses to an evaluation device which converts the counting pulses into a linear measure. This provides, for example, a simple way of running an anchor chain to a precise depth and afterward hauling it in again.

Description

Vorrichtung zur Längenmessung an einer GliederketteDevice for measuring length on a link chain
Die Erfindung bezieht sich auf eine Vorrichtung zur Längen- messung an einer aus einzelnen Gliedern gebildeten Kette mit¬ tels eines Zählwerks, das durch die Kette betätigbar ist.The invention relates to a device for measuring the length of a chain formed by individual links by means of a counter which can be actuated by the chain.
Eine Vorrichtung zur Längenmessung an einer Kette ist z.B. durch die WO 91/12486 bekannt geworden. Danach wird die Kette über ein Kettenrad geführt, daß mit einem magnetisch wirksa¬ men Element versehen ist. Ein stationärer Magnetsensor ist an einem Getriebemotorgehäuse gegenüber der Umlaufbahn des Ele¬ mentes angebracht. Der Sensor enthält einen Reedkontakt, der beim Vorbeigleiten des Elementes seine Schaltstellung verän- dert und somit einen elektrischen Impuls erzeugt, der an eine Auswerte- und Anzeigevorrichtung übertragen wird, die aus der Anzahl der detektierten Umdrehungen des Kettenrades die Länge des transportierten Kettenabschnittes berechnet und anzeigt.A device for length measurement on a chain is e.g. made known by WO 91/12486. The chain is then guided over a sprocket that is provided with a magnetically active element. A stationary magnetic sensor is attached to a geared motor housing opposite the orbit of the element. The sensor contains a reed contact, which changes its switching position when the element slides past and thus generates an electrical pulse that is transmitted to an evaluation and display device that calculates and displays the length of the chain section transported from the number of revolutions of the chain wheel detected .
Es ist z.B. bei Yachten üblich, die Ankerkette mittels einer Ankerwinde zu betätigen, die auf dem Deck der Yacht befestigt ist. Die Winde weist ein Kettenrad auf, über das die Kette rutschfest läuft. Mit dem Kettenrad ist ein Magnet verbunden. Ein stationärer Sensor ist im Wirkungsbereich des Magneten angeordnet und wird von diesem beim Vorbeigleiten erregt. Es ergeben sich Zählimpulse, die die Anzahl der Umdrehungen wi¬ derspiegeln. Bei der Umrechnung der Zählimpulse in ein Län¬ genmaß muß der Durchmesser des Kettenrades berücksichtigt werden. Wegen dieser Abhängigkeit muß also für jeden Durch- messer eine individuell abgestimmte Zähleinrichtung verwendet werden. Wegen der Unsicherheit hinsichtlich des Durchmessers des Kettenrades eignet sich die Zähleinrichtung kaum zum Nachrüsten vorhandener Kettenantriebe.It is e.g. It is common for yachts to operate the anchor chain using an anchor winch attached to the deck of the yacht. The winch has a sprocket over which the chain runs non-slip. A magnet is connected to the sprocket. A stationary sensor is located in the effective area of the magnet and is excited by it as it slides past. There are counting pulses which reflect the number of revolutions. The diameter of the chain wheel must be taken into account when converting the counting pulses into a length dimension. Because of this dependency, an individually coordinated counting device must be used for each diameter. Because of the uncertainty regarding the diameter of the chain wheel, the counting device is hardly suitable for retrofitting existing chain drives.
Ferner ist durch die US 5,233,294 ein Metallsensor mit einem Sensordraht bekannt geworden, den ein elektromagnetisches Feld umgibt, daß sich bei der Annäherung an Metall verändert. Eine Längenmeßeinrichtung weist z.B. ein kettenähliches Me¬ tallband auf, das aus zwei Seitenstreifen und einer Vielzahl von querstehenden Verbindungsstegen mit gleichem Teilungsab¬ stand besteht. Der Sensordraht ist parallel zu den Querstegen in der Nähe des Metallbandes angeordnet. Beim Passieren eines Querstege wird die Veränderung des elektromagnetischen Feldes festgestellt.Furthermore, US Pat. No. 5,233,294 has disclosed a metal sensor with a sensor wire which is surrounded by an electromagnetic field and which changes when it approaches metal. A length measuring device has, for example, a chain-like metal strip which consists of two side strips and a large number of transverse connecting webs with the same spacing. The sensor wire is arranged parallel to the crossbars near the metal strip. When passing a crossbar, the change in the electromagnetic field is determined.
Ferner ist durch die DE 35 24 338 AI eine Einrichtung zur Überwachung des Verschleißes bei einer Endloskette einesFurthermore, DE 35 24 338 AI is a device for monitoring wear in an endless chain
Trogkettenförderers bekannt geworden. Danach ist die Kette mit querstehenden Mitnehmern versehen, die zueinander einen definierten Abstand aufweisen. Zwei feststehende Sensoren sind in einem ganzzahligen Vielfachen des TeilungsabStandes der Kettenglieder angeordnet, tasten die Mitnehmer ab und be¬ einflussen einen Signalgeber Dadurch ist es möglich, eine verschleißbedingte Abstandsänderung zwischen den Mitnehmern festzustellen.Trough chain conveyor became known. The chain is then provided with transverse drivers which are at a defined distance from one another. Two fixed sensors are arranged in an integral multiple of the pitch of the chain links, scan the drivers and influence a signal transmitter. This makes it possible to determine a change in distance between the drivers due to wear.
Ferner ist durch die DE 9004520 Ul eine Senkloteinrichtung zu Bestimmung der Schütthöhe in einem Schachtofen mit einem auf eine Trommel aufgewickelten Zugmittel bekannt geworden. Ein von der Trommelwelle angetriebener Wegaufnehmer zeigt die Länge des abgewickelten Abschnittes des Zugmittels und damit die Höhe des Schüttgutes im Ofen an.Furthermore, a plumb bob device for determining the dumping height in a shaft furnace with a traction means wound on a drum has become known from DE 9004520 U1. A displacement sensor driven by the drum shaft shows the length of the unwound section of the traction device and thus the height of the bulk material in the furnace.
Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zu schaffen, die unabhängig von unterschiedlichen Antriebsver¬ hältnissen eine genaue Längenmessung an der Ankerkette ermög- licht.The invention has for its object to provide a device that enables an accurate length measurement on the anchor chain regardless of different drive conditions.
Diese Aufgabe wird durch die Erfindung gemäß Anspruch 1 ge¬ löst. Da nun der Detektor die Glieder unmittelbar abtastet und zählt, wird die Längenmessung unabhängig von den An- triebsmitteln für die Kette. Es ist möglich, die Auswerteein¬ richtung auf die Teilungsabstände der Glieder einzustellen, ohne daß dazu Maßnahmen mechanischer Art nötig sind. Es ist ferner möglich, den Detektor an einer geeigneten Stelle unab¬ hängig von der Antriebseinrichtung anzubringen. Er kann sehr kompakt gehalten werden und daher leicht auch nachträglich in vorhandene Kettenzüge eingegliedert werden.This object is achieved by the invention according to claim 1. Since the detector now scans and counts the links directly, the length measurement is independent of the drive means for the chain. It is possible to adjust the evaluation device to the spacing between the links, without the need for mechanical measures. It is it is also possible to mount the detector at a suitable point independently of the drive device. It can be kept very compact and can therefore easily be retrofitted into existing chain hoists.
Bei einer Stahlkette kann der Sensor z. B. als Magnetsensor ausgebildet sein, dessen Magnetfeld je nach Lage der einzelnen Glieder relativ zum Sensor veränderbar ist. Beim Vorbeigleiten der Glieder kann diese Änderung elektrisch detektiert und und entsprechend ausgewertet werden.With a steel chain, the sensor can e.g. B. be designed as a magnetic sensor whose magnetic field can be changed relative to the sensor depending on the position of the individual members. When the limbs slide past, this change can be electrically detected and evaluated accordingly.
Die Mittel zum Einstellen des Teilungsabstandes können beson¬ ders vorteilhaft als DIP-Schalter, Kodierstecker oder aufzu¬ trennende Lötbrücken ausgebildet sein. Sie ermöglichen in einfacher Weise die Einstellung der Auswerteeinrichtung auf die unterschiedlichen genormten Teilungsabstände verschiede¬ ner Kettentypen. Die Einstellung erfolgt bei der Installation des Sensors z.B. durch Fachpersonal oder auch mittels Anlei¬ tung durch den Benutzer selbst. Beim Austausch der Kette kann die Auswerteeinrichtung leicht auf einen anderen Teilungsab¬ stand eingestellt werden.The means for adjusting the pitch can be designed particularly advantageously as DIP switches, coding plugs or solder bridges to be separated. They enable the evaluation device to be set in a simple manner to the different standardized pitch spacings of different chain types. The setting is made when installing the sensor e.g. by specialist personnel or by means of instructions from the user himself. When the chain is replaced, the evaluation device can easily be set to a different pitch.
Vorteilhafte Weiterbildungen der Erfindung sind in den An¬ sprüchen 2 bis 17 gekennzeichnet:Advantageous developments of the invention are characterized in claims 2 to 17:
Durch die Weiterbildung nach Anspruch 2 erhält der Detektor eine aktive Abtastung, die sich für jedes metallische, auch nichtmagnetische Material eignet, selbst dann, wenn die Kette stark verschmutzt ist.Through the development according to claim 2, the detector receives an active scanning, which is suitable for any metallic, even non-magnetic material, even if the chain is very dirty.
Bei den Weiterbildungen nach den Ansprüchen 3 und 4 wird das elektromagnetische Feld vom Kettenmaterial durchlaufen und in diesem Moment stark gedämpft, so daß sich der Speisestrom er¬ höht. Diese Erhöhung wird in der Detektorschaltung in einen Rechteckimpuls umgewandelt, der problemlos auch über eine größere Entfernung zur Auswerteeinrichtung übertragen werden kann. Durch die Weiterbildung nach Anspruch 5 ist es möglich, die Bewegungsrichtung der Kette festzustellen, indem die beiden hintereinanderliegenden Induktionsspulen getrennt gespeist und gemessen werden. Wird der Teilungsabstand zwischen den Induktionsspulen kleiner gehalten als der Abstand zwischen zwei aufeinanderfolgenden Gliedern, so kann die Bewegungs- richtung bereits nach einer kurzen Bewegung festgestellt wer¬ den.In the developments according to claims 3 and 4, the electromagnetic field is traversed by the chain material and is strongly damped at this moment, so that the feed current increases. This increase is converted into a rectangular pulse in the detector circuit, which can also be transmitted over a greater distance to the evaluation device without any problems. Through the development according to claim 5, it is possible to determine the direction of movement of the chain by separately feeding and measuring the two induction coils lying one behind the other. If the spacing between the induction coils is kept smaller than the distance between two successive links, the direction of movement can be determined after only a short movement.
Durch die Weiterbildungen nach den Ansprüchen 6 bis 8 ist es möglich, die Kette mit relativ großem Spiel am Detektor vor¬ beizuführen. Dabei können die beiden gegenüberliegenden Spu¬ len unterschiedlich stark gedämpft werden. Diese Unterschiede gleichen sich jedoch in der gemeinsamen Speiseleitung aus. Dadurch eignet sich der Detektor für unterschiedliche Kettentypen von ähnlicher Dicke.The further developments according to claims 6 to 8 make it possible for the chain to be guided along the detector with a relatively large amount of play. The two opposite coils can be damped to different extents. However, these differences balance each other out in the common feed line. This makes the detector suitable for different types of chains of similar thickness.
Der Führungskörper nach den Ansprüchen 9 und 10 kann leicht auf unterschiedliche Weise an verschiedenen Stellen der Yacht z.B. im Einlaufbereich eines Kettenkastens angebracht werden. Der der Kettenkontur angepaßte kreuzförmige Durchbruch ver¬ hindert dabei, daß sich die Kette beim Einziehen verdreht und verschlingt. Sie kann dann entsprechend leicht wieder heraus- gezogen werden.The guide body according to claims 9 and 10 can easily in different ways at different locations on the yacht e.g. be installed in the inlet area of a chain case. The cross-shaped opening adapted to the chain contour prevents the chain from twisting and swallowing when it is pulled in. It can then be easily pulled out again.
Die Weiterbildung nach Anspruch 11 verbindet geringe Rei¬ bungskräfte mit einer hohen Lebensdauer und vermeidet jegli¬ che Korrosionsgefahr. Die gesamte Detektorelektrik kann in den Führungskörper leicht eingesetzt und in diesem durch Ver¬ gießen hermetisch verschlossen werden.The development according to claim 11 combines low frictional forces with a long service life and avoids any risk of corrosion. The entire detector electrical system can easily be inserted into the guide body and hermetically sealed in it by casting.
Die Weiterbildung nach Anspruch 12 kann z.B. durch unter¬ schiedlich markierte Lämpchen problemlos realisiert werden. Durch die Weiterbildung nach Anspruch 13 besteht die Vorrich¬ tung zur Längenmessung aus lediglich zwei verschiedenen Funk¬ tionseinheiten.The development according to claim 12 can be easily implemented, for example, by differently marked lamps. Due to the development according to claim 13, the device for length measurement consists of only two different functional units.
Die Weiterbildung nach Anspruch 14 eignet sich besonders für Yachten mit fernbetätigtem Kettenantrieb vom Steuerstand aus.The development according to claim 14 is particularly suitable for yachts with a remote chain drive from the steering position.
Die Weiterbildung nach Anspruch 15 macht es möglich, das Ge¬ rät in der Nähe der Ankerwinde abzulegen und diese z.B. von Hand zu betätigen.The development according to claim 15 makes it possible to place the device in the vicinity of the windlass and this e.g. operated by hand.
Durch die Pufferbatterie nach Anspruch 16 kann der gemessene Wert gespeichert bleiben, auch wenn das Gerät zwischenzeit¬ lich zu einem anderen Anschluß gebracht wird.The measured value can remain stored by the buffer battery according to claim 16, even if the device is brought to another connection in the meantime.
Durch die Weiterbildung nach Anspruch 17 lassen sich der Ket¬ tenantrieb und die Längenmeßeinrichtung bedienungsfreundlich kombinieren.Through the development according to claim 17, the chain drive and the length measuring device can be combined in a user-friendly manner.
Im folgenden wird die Erfindung anhand eines in der Zeichung dargestellten Ausführungsbeispieles näher erläutert. Es zei¬ gen:The invention is explained in more detail below with reference to an embodiment shown in the drawing. It shows:
Fig 1 eine perspektivische Ansicht einer Vorrichtung zur Längenmessung an einer Kette mit einem Detektor und einer Anzeige-, und Auswerteeinrichtung zum festen Einbau in einen Steuerstand, Fig 2 eine Meßvorrichtung wie in Fig 1, jedoch mit einer portablen Anzeige-, und Auswerteeinrichtung, Fig 3 eine Draufsicht auf den Detektor nach Fig.l und 2,1 shows a perspective view of a device for length measurement on a chain with a detector and a display and evaluation device for fixed installation in a control station, FIG. 2 shows a measuring device as in FIG. 1, but with a portable display and evaluation device, FIG. 3 a plan view of the detector of Fig.l and 2,
Fig 4 eine perspektivische Ansicht des Detektors nach Fig. 2 mit elektronischen Bauteilen, die in der Art einer Explosionszeichnung schematisiert dargestellt sind, Fig 5 schematisiert einen Schnitt durch den Detektor nach Fig.4 mit den eingesetzten elektronischen Bauteilen. Nach Fig 1 weist ein Detektor .1 zum Abtasten von Gliedern ei¬ ner Kette 2 einen ringartigen Führungskörper 3 auf, der elek¬ tromagnetische Abtastmittel enthält. Der Detektor ist über eine Leitung 4 mit einer zu einem Gerät 5 zusammengefaßten Auswerte-, und Anzeigeeinrichtung verbunden. Das Gerät 5 ist mit einem Display 6 zum Anzeigen der gemessenen Längen verse¬ hen. Ferner weist es eine Resettaste 7 auf, mittels der die Ausgangsstellung der Kette mit dem Wert 0 markiert werden kann. Außerdem sind Kontrolllämpchen 8 zum Anzeigen der Bewe- gungsrichtung vorgesehen.4 shows a perspective view of the detector according to FIG. 2 with electronic components, which are shown schematically in the manner of an exploded drawing, FIG. 5 schematically shows a section through the detector according to FIG. 4 with the electronic components used. According to FIG. 1, a detector .1 for scanning links in a chain 2 has a ring-like guide body 3 which contains electromagnetic scanning means. The detector is connected via a line 4 to an evaluation and display device combined to form a device 5. The device 5 is provided with a display 6 for displaying the measured lengths. It also has a reset button 7, by means of which the initial position of the chain can be marked with the value 0. In addition, control lamps 8 are provided for indicating the direction of movement.
Nach Fig 2 ist die Auswerte-, und Anzeigeeinrichtung in einem portablen Handgerät 9 realisiert, daß über eine verlängerte Leitung 4 mit dem Detektor l verbunden ist. Es weist eine Pufferbatterie zur netzunabhängigen Speicherung der gemesse¬ nen Werte auf.According to FIG. 2, the evaluation and display device is implemented in a portable hand-held device 9 that is connected to the detector 1 via an extended line 4. It has a buffer battery for storing the measured values independently of the network.
Nach den Fig 3 bis 5 weist der Detektor 1 einen im wesentli¬ chen zylindrischen flanschartigen Führungskörper 10 mit einem zentralen Durchbruch 11 auf, der mit koaxialen Nuten versehen ist, die der Querschnittsskontur der Kette angepaßt sind. In den Führungskörper sind ferner transversal gegenüberliegende Aufnahmeräume 12 für zwei elektronische Baugruppen 13 und Verbindungsdrähte 14 vorgesehen, die die Baugruppen unterein- ander und mit einem Steckverbinder zum Anschließen der Lei¬ tung 4 verbinden.3 to 5, the detector 1 has an essentially cylindrical flange-like guide body 10 with a central opening 11 which is provided with coaxial grooves which are adapted to the cross-sectional contour of the chain. Transversely opposite receiving spaces 12 are also provided in the guide body for two electronic assemblies 13 and connecting wires 14, which connect the assemblies to one another and to a connector for connecting the line 4.
Die Baugruppen 13 weisen auf der dem Durchbruch 11 zugewand¬ ten Innenseite zwei in der Achsrichtung hintereinanderliegen- de Paare von Induktionsspulen 16 auf, von denen jeweils die mit A bzw. B gekennzeichneten aus einer gemeinsamen Speise¬ leitung gespeist werden. Die Induktionsspulen erzeugen elek¬ tromagnetische Felder 17, die durch eintauchende Glieder so stark gedämpft werden, daß sich der Speisestrom erhöht. Aus dieser Änderung wird von der auf der Baugruppe 13 angebrach¬ ten Detektorschaltung ein Zählimpuls erzeugt, der über den Steckverbinder 15 und die Leitung 4 (Fig 1) der Auswerteein¬ richtung im Gerät 5 übermittelt wird. The assemblies 13 have, on the inside facing the opening 11, two pairs of induction coils 16 one behind the other in the axial direction, of which the ones labeled A and B are fed from a common feed line. The induction coils generate electromagnetic fields 17 which are so strongly damped by immersing members that the feed current increases. From this change, the detector circuit mounted on the module 13 generates a counting pulse which is transmitted via the Plug connector 15 and line 4 (FIG. 1) of the evaluation device in device 5 are transmitted.

Claims

Patentansprüche: Claims:
1. Vorrichtung zur Längenmessung an einer aus einzelnen Glie¬ dern gebildeten Kette (2) mittels eines Zählwerks, das durch die Kette betätigbar ist, dadurch gekennzeichnet, daß das Zählwerk als elektromagnetisch wirkender Detektor (1) ausgebildet ist, daß die Kette (2) am Detektor (1) geführt und relativ zu diesem bewegbar ist, daß der Detektor (1) mit einer Auswerteeinrichtung verbunden ist und an diese beim Passieren eines Gliedes einen elektrischen Zählimpuls abgibt, daß die gezählten Impulse in der Auswerteeinrichtung in ein1. Device for measuring length on a chain (2) formed from individual links by means of a counter that can be actuated by the chain, characterized in that the counter is designed as an electromagnetic detector (1) that the chain (2) guided on the detector (1) and movable relative to it, that the detector (1) is connected to an evaluation device and outputs an electrical counting pulse to it when passing a link that the counted pulses in the evaluation device
Längenmaß umgerechnet werden, daß die Auswerteeinrichtung mit Mitteln zum Einstellen auf den Teilungsabstand der Glieder versehen ist und daß die Auswerteeinrichtung mit einer Anzei¬ geeinrichtung verbunden ist, in der das Längenmaß darstellbar ist.Length dimension are converted that the evaluation device is provided with means for adjusting the pitch of the links and that the evaluation device is connected to a display device in which the length dimension can be represented.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Detektor (l) zumindest eine Induktionsspule (16) auf¬ weist, die im Bereich der Glieder ein hochfrequentes elektro- magnetisches Feld erzeugt, das beim Vorbeibewegen der Glieder verändert wird und daß diese Änderung in einer Detektor¬ schaltung (z.B. 13) in die Zählimpulse umwandelbar ist.2. Device according to claim 1, characterized in that the detector (l) has at least one induction coil (16) which produces a high-frequency electromagnetic field in the area of the links, which is changed when the links move past and that this change can be converted into the counting pulses in a detector circuit (eg 13).
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Schwankung des elektromagnetischen Feldes eine Ände¬ rung der elektrischen Werte in der Speiseleitung zu der In¬ duktionsspule (16) bewirkt und daß diese Änderung von der De¬ tektorschaltung ausgewertet wird.3. Device according to claim 2, characterized in that the fluctuation of the electromagnetic field causes a change in the electrical values in the feed line to the induction coil (16) and that this change is evaluated by the detector circuit.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Detektorschaltung (z.B. 13) im Detektor (1) angeord¬ net ist. 4. The device according to claim 3, characterized in that the detector circuit (eg 13) in the detector (1) is angeord¬ net.
5. Vorrichtung nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, daß in der Längsrichtung der Kette (2) zwei Induktionsspulen (16) hintereinanderliegend angeordnet sind, deren Mittenab- stand voneinander vom Teilungsabstand der Glieder abweicht.5. Apparatus according to claim 2, 3 or 4, characterized in that in the longitudinal direction of the chain (2) two induction coils (16) are arranged one behind the other, the center distance of which deviates from the pitch of the links.
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zu beiden Seiten der Kette zumindest ein diametral gegen- überliegendes Paar von Induktionsspulen (16) angeordnet ist.6. Device according to one of the preceding claims, characterized in that at least one diametrically opposite pair of induction coils (16) is arranged on both sides of the chain.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß beide Induktionsspulen (16) eines Paares über eine ge¬ meinsame Zuleitung gespeist werden.7. The device according to claim 6, characterized in that both induction coils (16) of a pair are fed via a common supply line.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet , daß die Meßstelle zur Feststellung der Änderung des Speise¬ stroms vor der Verzweigung der Speiseleitung zu den beiden Induktionsspulen (16) eines Spulenpaares liegt.8. The device according to claim 7, characterized in that the measuring point for determining the change in the Speise¬ current before the branching of the feed line to the two induction coils (16) of a pair of coils.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Induktionsspulen (16) in einem ringartigen Führungs- körper (10) für die Kette angeordnet sind, der eine der Quer- schnittskontur der Kette angepaßten Durchbruch (11) aufweist.9. Device according to one of the preceding claims, characterized in that the induction coils (16) are arranged in a ring-like guide body (10) for the chain, which has an opening (11) adapted to the cross-sectional contour of the chain.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Führungskörper (11) flanschartig ausgebildet ist und an einer Außenwand eines Ankerkettenkastens einer Yacht oder in diesem befestigbar ist.10. The device according to claim 9, characterized in that the guide body (11) is flange-like and can be fastened to an outer wall of an anchor chain box of a yacht or in this.
11. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß der Durchbruch (11) für die Kette mit einem abriebfestem Kunststoff versehen ist.11. The device according to claim 9 or 10, characterized in that the opening (11) for the chain is provided with an abrasion-resistant plastic.
12. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an der Anzeigeeinrichtung die Bewegungsrichtung der Kette anzeigbar ist.12. Device according to one of the preceding claims, characterized in that the direction of movement of the chain can be displayed on the display device.
13. Vorrichtung nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß die Anzeigeeinrichtung und die Auswerteeinrichtung in ei¬ nem Gerät (5,9) zusammengefaßt sind.13. Device according to one of the preceding claims, characterized in that the display device and the evaluation device are combined in one device (5, 9).
14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß das Gerät (5) fest in einen Steuerstand einer Yacht einbaubar ist.14. The apparatus according to claim 13, characterized in that the device (5) can be permanently installed in a steering position of a yacht.
15. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß das Gerät (9) portabel ausgebildet ist und daß auf der Yacht an verschiedenen geeigneten Stellen Anschlußbuchsen zum Anschalten des Geräts (9) vorgesehen sind.15. The apparatus according to claim 13, characterized in that the device (9) is designed to be portable and that on the yacht at various suitable locations connection sockets for switching on the device (9) are provided.
16. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß das Gerät (5,9) eine Pufferbatterie aufweist, durch die die gemessenen Werte auch im nicht angeschlossenen Zustand gespeichert bleiben.16. The apparatus according to claim 14, characterized in that the device (5,9) has a backup battery through which the measured values remain stored even when not connected.
17. Vorrichtung nach einem der vorhergehenden Ansprüche, da¬ durch gekennzeichnet, daß das Gerät mit einer Steuereinrichtung zum Antreiben der Kette verbunden ist und Eingabemittel zum Steuern der Ketten¬ bewegung aufweist. 17. Device according to one of the preceding claims, characterized in that the device is connected to a control device for driving the chain and has input means for controlling the chain movement.
EP95901318A 1993-11-18 1994-11-17 Device for linear measurement along a link chain Withdrawn EP0727037A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19934339595 DE4339595C1 (en) 1993-11-18 1993-11-18 Device for measuring the length of a link-chain
DE4339595 1993-11-18
PCT/DE1994/001372 WO1995014904A2 (en) 1993-11-18 1994-11-17 Device for linear measurement along a link chain

Publications (1)

Publication Number Publication Date
EP0727037A1 true EP0727037A1 (en) 1996-08-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95901318A Withdrawn EP0727037A1 (en) 1993-11-18 1994-11-17 Device for linear measurement along a link chain

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EP (1) EP0727037A1 (en)
AU (1) AU1061895A (en)
DE (1) DE4339595C1 (en)
WO (1) WO1995014904A2 (en)

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Also Published As

Publication number Publication date
DE4339595C1 (en) 1995-01-12
AU1061895A (en) 1995-06-13
WO1995014904A3 (en) 1995-06-29
WO1995014904A2 (en) 1995-06-01

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