Patents Assigned to Johannes Heidenhain GmbH
  • Patent number: 8359764
    Abstract: A holding device for a scale including a support body, a first solid body link and a second body link. The first solid body link acts as a connection between a first longitudinal side of a scale and the support body, via which the scale can be seated, shiftable in a measuring direction, on the support body. The second solid body link acts as a connection between a second longitudinal side of the scale and the support body, via which the scale can be seated, shiftable in the measuring direction, on the support body, wherein the second longitudinal side and the first longitudinal side are arranged opposite each other.
    Type: Grant
    Filed: December 10, 2007
    Date of Patent: January 29, 2013
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Wolfgang Pucher, Ernst Thielicke, Reinhard Mayer, Kilian Bauer, Karl Fiedler
  • Patent number: 8341852
    Abstract: An arrangement for generating a reference impulse for a position measuring device, wherein the position measuring device includes a scale with at least one incremental track and at least one reference mark and a scanning unit for generating position signals by scanning the at least one incremental track and for generating an analog reference impulse by scanning the at least one reference mark. The arrangement includes a reference impulse memory unit that receives the analog reference impulse and stores the received analog reference impulse as a stored reference impulse. The arrangement further includes a reference impulse generating unit in communication with the reference impulse memory unit.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: January 1, 2013
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Gerd Böhm
  • Patent number: 8339126
    Abstract: A position-measuring device includes a measuring standard, on which at least one graduation track is applied, and a support member. Disposed on the support member is at least one exciter winding through which an excitation current is able to be conducted in order to generate an electromagnetic field, as well as at least one detector system for scanning the electromagnetic field, The position-measuring device further includes a capacitor which, together with the exciter winding, forms an LC oscillating circuit, an evaluation element and a switching element that is switchable by the evaluation element. The measuring standard and the support member are disposed in a manner allowing movement relative to each other, and in response to a movement of the measuring standard relative to the support member, the electromagnetic field is able to be influenced by the at least one graduation track.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: December 25, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Richard Izak, Johann Oberhauser, Robert Noichl
  • Patent number: 8311131
    Abstract: The present invention relates to a method for interpolating, for the purpose of measurement of lengths and/or angles, at least two position-dependent, periodic analog signals that are phase-shifted with respect to each other and that are generated by scanning a measuring scale. According to the inventive method, the analog signals are converted to a digital data stream using a sigma-delta modulator, the data streams are combined with correctional factors and then with each other to generate a string of results, and said string of results is used to generate new correctional values by the use of a quality criterion to be satisfied for interpolation and also to generate the output signals of interpolation. The values (d) of the string of results are accumulated over a specified time interval in order to generate the correctional values (k1, k2) and the output signals (w).
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: November 13, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Roman Woyzichovski
  • Patent number: 8278911
    Abstract: An inductive angle-of-rotation sensor includes a printed circuit board, on which one excitation conductor path, and a first, second as well as third receiving conductor path are applied. The angle-of-rotation sensor further includes a graduation element having a first and second graduation track. The first and second graduation tracks, and the first and second receiving conductor paths are arranged such that signals having a first period number are able to be generated by the first receiving conductor path, and signals having a second period number are able to be generated by the second receiving conductor path. The graduation element further has a third graduation track, so that signals having the first period number are able to be generated by the third receiving conductor path. In addition, a method is provided for operating an angle-of-rotation sensor.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: October 2, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Marc Oliver Tiemann, Eva Silmbroth
  • Patent number: 8234793
    Abstract: An arrangement for a scale, the arrangement including a scale having a measurement graduation that defines a measurement range and a support arranged opposite to the measurement graduation. The arrangement further includes spheres two-dimensionally distributed on the support, wherein the spheres are immovably fixed on the support and to the scale.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: August 7, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Josef Weidmann, Peter Speckbacher
  • Patent number: 8234792
    Abstract: A linear encoder that includes a housing having: an elongated hollow profile section including a first face end and a second face end; a cap disposed on the first face end; and a seal which is disposed in sealing fashion between the hollow profile section and the cap, wherein the seal includes an electrically conductive connecting element. The linear encoder further includes a scale made of electrically nonconductive material, wherein the scale is disposed inside the housing and the scale includes a measuring graduation that is scannable by a scanning unit, which is movable in a measurement direction relative to the housing. The linear encoder includes a shunt made of electrically conductive material, wherein the shunt is mounted on the scale and extends in the measurement direction and wherein the electrically conductive connecting element is configured so as to establish an electrical connection between the shunt and at least one of the hollow profile section and the cap.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: August 7, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Oliver Schenk, Andreas Reith
  • Patent number: 8169619
    Abstract: A detector element array for an optical position measuring instrument, by way of such array a fringe pattern resulting in a detector plane can be converted into electrical scanning signals. The detector element array includes a plurality of light-sensitive detector elements disposed in matrix-like fashion in rows and columns. The plurality of light-sensitive detector elements include a first detector element in a first column of the columns, a second detector element in the first column that is adjacent to the first detector element and a third detector element in a second column of the columns that is adjacent to the first column, wherein the third detector element is diagonally adjacent to the first detector element. The detector element array includes a first switch that selectively directly connects the first detector element with the second detector element and a second switch that selectively directly connects the first detector element with the third detector element.
    Type: Grant
    Filed: September 27, 2008
    Date of Patent: May 1, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Johann Oberhauser
  • Patent number: 8156658
    Abstract: A linear encoder that includes a scale supporting a measurement graduation and an assembly that includes a support. The scale is fastened on the assembly by a fastener, wherein the fastener has a structure that makes a temperature-dependent linear expansion of the support in relation to the scale possible in case of temperature changes. The linear encoder includes a holder in a position in a measuring direction, wherein the holder fastens the scale to a body to be measured by the linear encoder at a fixed point while bypassing the support. In addition, the assembly is fastened by the support on the body to be measured by the linear encoder.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: April 17, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Jens Kummetz, Tim Boye, Martin Seichter, Dirk Geyermann
  • Patent number: 8159681
    Abstract: A measuring device for determining the relative offset between two components in a z-direction includes two measuring members. A first measuring member is affixable on a first component, and the second measuring member is affixable on a second component. Furthermore, the measuring device includes a sensor device for determining the relative position of the two measuring members. The first measuring member and the second measuring member are affixable on the first components at a rigid angle. At least one of the measuring members is able to be brought into adhesive contact with the first component or the second component. The measuring device includes support members for at least one measuring member so that the measuring member is able to assume a parking or an operating position. The measuring members are precisely and reproducibly aligned in space relative to each other in the parking position.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: April 17, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Gerhard Bock, Michael Hermann, Wolfgang Holzapfel, Karsten Saendig, Johannes Trautner
  • Patent number: 8154427
    Abstract: A multiturn rotary encoder includes: a single-turn unit, including a code carrier and a single-turn evaluation unit for processing single-turn position signals to form a single-turn code word; a first multiturn unit, including at least one first multiturn code carrier and a first multiturn evaluation unit for processing first multiturn position signals to form a first multiturn code word that indicates the number of revolutions covered by input shaft; and a second multiturn unit, including at least one second multiturn code carrier and a second multiturn evaluation unit for processing second multiturn position signals to form a second multiturn code word that likewise indicates the number of revolutions covered by the input shaft. The functioning of the multiturn units is ascertainable by the multiturn code words generated independently of each other.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: April 10, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Elmar Mayer, Erich Strasser, Hermann Hofbauer
  • Patent number: 8146259
    Abstract: A rotary encoder includes a stator and a rotor, the rotor being disposed in a manner allowing rotation relative to the stator with the aid of a bearing. The rotor has a shaft, a positive-locking device as well as a code disk being secured in rotatably fixed manner to the shaft. The stator has a body having a scanning device for scanning the code disk, a compensating coupling and a housing. The body is joined to the housing by the compensating coupling. The housing has a further positive-locking device, the rotary encoder being pre-adjusted such that in operation of the rotary encoder, at a predefined relative angular position between the positive-locking device of the shaft and the further positive-locking device of the housing, a predefined angle value is able to be output by the rotary encoder. A series of rotary encoders may be provided.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: April 3, 2012
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Andreas Schroter, Sebastian Riepertinger
  • Patent number: 8081321
    Abstract: A scanning unit, by which a scale, which is movable in relation to the scanning unit in a measuring direction, can be optically scanned. The scanning unit including a detector arrangement and a transparent support having a first surface and a second surface, wherein the detector arrangement is arranged on the second surface. The scanning unit further including a transparent cover plate, which is fastened on the first surface of the transparent support and includes a shielding device for shielding the detector arrangement against electromagnetic fields.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: December 20, 2011
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Giselher Schneider
  • Publication number: 20110258358
    Abstract: In a device and a method for the automated detection of an interface between a position-measuring device and sequential electronics that are interconnected via a data-transmission channel, the position-measuring device includes an interface unit and a position-measuring unit. The interface unit is connected first of all to the data-transmission channel, and secondly to the position-measuring unit for the purpose of an internal data exchange. The interface to the sequential electronics is selectable in the interface unit from at least two interfaces.
    Type: Application
    Filed: November 3, 2009
    Publication date: October 20, 2011
    Applicant: Dr. Johannes Heidenhain GmbH
    Inventors: Elmar Mayer, Alexander Kobler
  • Patent number: 8032738
    Abstract: A method for the start-up of a numerical control of machine tools or production machinery, wherein the numerical control includes a main computer and a follow-up device, which are connected with each other via a data transmission network, wherein the follow-up device is addressable by the main computer via a logical address and a hardware address, with information regarding a physical address of the follow-up device in the data transmission network, is allocated to the logical address. The method includes sequentially requesting in a set-up mode of operation of the main computer allocating information regarding a logical address and a hardware address from an operator for the follow-up device and other follow-up devices to whose logical address no hardware address had been allocated. The method further including storing the logical address and the hardware address in a memory unit after the allocating information has been performed.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: October 4, 2011
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Norbert Kerner, Georg Zehentner
  • Publication number: 20110218761
    Abstract: An absolute angle coding that includes a first cyclically continued code sequence that cyclically continues a first code sequence a multiple number of times, wherein the first code sequence is disposed within 360° and includes a first succession of code elements that defines a first angle sector. The code further includes a second cyclically continued code sequence that cyclically continues a second code sequence a multiple number of times, wherein the second code sequence is disposed within 360° and includes a second succession of code elements that defines a second angle sector, wherein the first cyclically continued sequence and the second cyclically continued code sequence in combination unambiguously absolutely encode the 360°. The first angle sector is not equal to the second angle sector, and at least one of the second code sequences of the second cyclically continued code sequence is embodied only partially within said 360° and with a succeeding second code sequence forms a joint.
    Type: Application
    Filed: October 1, 2009
    Publication date: September 8, 2011
    Applicant: DR JOHANNES HEIDENHAIN GMBH
    Inventor: Christoph Lingk
  • Publication number: 20110209352
    Abstract: A length measuring device for measuring a relative position of two objects, the length measuring device including a scale in a housing and a scanning unit displaceable in a measuring direction X relative to the scale and the housing, wherein the scanning unit is disposed inside the housing and including a heat-generating electrical component. The length measuring device further including a thermal conduction path designed for transferring heat generated at the heat-generating electrical component to the housing.
    Type: Application
    Filed: October 13, 2009
    Publication date: September 1, 2011
    Applicant: Dr. Johannes Heidenhain GmbH
    Inventors: Alfred Affa, Johannes Haunreiter
  • Publication number: 20110209351
    Abstract: An arrangement for generating a reference impulse for a position measuring device, wherein the position measuring device includes a scale with at least one incremental track and at least one reference mark and a scanning unit for generating position signals by scanning the at least one incremental track and for generating an analog reference impulse by scanning the at least one reference mark. The arrangement includes a reference impulse memory unit that receives the analog reference impulse and stores the received analog reference impulse as a stored reference impulse.
    Type: Application
    Filed: July 21, 2009
    Publication date: September 1, 2011
    Applicant: Dr. Johannes Heidenhain GmbH
    Inventor: Gerd Böhm
  • Publication number: 20110213586
    Abstract: In a device and a method for transmitting data between a position-measuring device and sequential electronics via a data-transmission channel, the position-measuring device includes an interface unit and a processing unit, the interface unit being connected first of all to the data-transmission channel, and secondly, to the processing unit for the purpose of an internal data exchange with the aid of a request channel and a response channel. The interface unit includes a command interpreter by which, using conversion rules, commands which arrive via the data-transmission channel are convertible into internal requests and are able to be fed via the request channel to the processing unit, and response data which arrives from the processing unit via the response channel is convertible into output data. The interface unit further includes a rules memory for storing the conversion rules, which is at least partially modifiable.
    Type: Application
    Filed: September 9, 2009
    Publication date: September 1, 2011
    Applicant: Dr. Johannes Heidenhain GmbH
    Inventors: Alexander Kobler, Heik H. Hellmich, Michael Walter, Terukiyo Hayashi, Ruedi Schoppmann, Takeshi Yamamoto
  • Publication number: 20110208475
    Abstract: An absolute angle coding that includes a first code sequence disposed within 360°, wherein the first code sequence has a first length and is disposed NA times in succession. The absolute angle coding includes a second code sequence disposed within 360°, wherein the second code sequence has a second length and is disposed NB times in succession, wherein the first code sequence and the second code sequence in combination absolutely unambiguously encode said 360°. In addition, NA is greater than or equal to 2 and NB is greater than or equal to 2 and NA is not equal to NB. The first length is not equal to the second length and the first code sequence and the second code sequence are disposed in one common track, in that a part of the first code sequence and a part of the second code sequence are disposed in alternation.
    Type: Application
    Filed: October 1, 2009
    Publication date: August 25, 2011
    Applicant: Dr. Johannes Heidenhain GmbH
    Inventor: Christoph Lingk