Patents by Inventor Paul C. Pawelski
Paul C. Pawelski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9204130Abstract: A method and a system for creating three dimensional representation of an object are provided. The method includes projecting a pattern image comprising one or more pattern elements and capturing an image of the object with the pattern image projected onto the object. The method includes extracting intensity values corresponding to at least two color components of each pixel of the captured image. For each color component, a probability map is generated using the corresponding intensity values. The probability map for a color component represents a probability that a pixel of the captured image is representing a part of a pattern element. A joint probability distribution is determined by combining the probability maps. Using the joint probability distribution, specific pattern elements are located in the captured image. The method includes determining three dimensional coordinates representing points on surface of the object based on the location of the specific pattern elements.Type: GrantFiled: February 6, 2013Date of Patent: December 1, 2015Assignee: Caterpillar Inc.Inventor: Paul C. Pawelski
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Publication number: 20140218477Abstract: A method and a system for creating three dimensional representation of an object are provided. The method includes projecting a pattern image comprising one or more pattern elements and capturing an image of the object with the pattern image projected onto the object. The method includes extracting intensity values corresponding to at least two color components of each pixel of the captured image. For each color component, a probability map is generated using the corresponding intensity values. The probability map for a color component represents a probability that a pixel of the captured image is representing a part of a pattern element. A joint probability distribution is determined by combining the probability maps. Using the joint probability distribution, specific pattern elements are located in the captured image. The method includes determining three dimensional coordinates representing points on surface of the object based on the location of the specific pattern elements.Type: ApplicationFiled: February 6, 2013Publication date: August 7, 2014Applicant: Caterpillar Inc.Inventor: Paul C. Pawelski
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Patent number: 8275192Abstract: An apparatus for axially aligning a first coupling member and a second coupling member that can be connected so as to form a rotating assembly. The apparatus includes a measurement arrangement configured to be mounted onto the first coupling member and to be rotated therewith. The measurement arrangement includes an emitter arrangement configured to emit first and second signals in the direction of the second coupling member so as to cause at least a portion of said first and second signals to be reflected by the second coupling member. The measurement apparatus further has a capture arrangement configured to capture at least a portion of the first and second reflected signals. The apparatus includes a control arrangement configured to determine an offset in axial alignment between the first and second coupling member based on at least the first and second reflected signals.Type: GrantFiled: December 23, 2008Date of Patent: September 25, 2012Assignee: Caterpillar Inc.Inventors: Nader W. Ktami, Paul C. Pawelski
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Patent number: 7634155Abstract: Consistent with an aspect of the present disclosure, a method of locating a position of a movable member is provided. The movable member is movable along a path and has a surface with a plurality of markings provided thereon. The method includes sensing an image of a portion of the surface of the movable member, and calculating a position of the movable member based on the image. Further, the method includes determining whether the movable member is at a location corresponding to one of the plurality of markings, and eliminating an error associated with the position when the movable member is at the location corresponding to the one of the plurality of markings.Type: GrantFiled: January 31, 2005Date of Patent: December 15, 2009Assignee: Caterpillar Inc.Inventors: Paul C. Pawelski, Francis J. Raab, Trent S. Kucher
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Patent number: 6934616Abstract: A control system for determining a position of an implement arm having a work implement is disclosed. The implement arm includes mating components connected by at least one joint. The control system includes at least one position sensor operably associated with the implement arm and configured to sense positional aspects of the implement arm. It also includes at least one load sensor operably associated with the implement arm, and configured to sense the direction of loads applied to the at least one joint. A controller is adapted to calculate a position of the implement arm based on signals received from the at least one position and load sensor. The calculated position takes into account shifting of the implement arm caused by clearances existing at the at least one joint between the mating components of the implement arm.Type: GrantFiled: October 8, 2003Date of Patent: August 23, 2005Assignee: Caterpillar IncInventors: Stephen Colburn, Paul C. Pawelski
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Publication number: 20040117095Abstract: A control system for determining a position of an implement arm having a work implement is disclosed. The implement arm includes mating components connected by at least one joint. The control system includes at least one position sensor operably associated with the implement arm and configured to sense positional aspects of the implement arm. It also includes at least one load sensor operably associated with the implement arm, and configured to sense the direction of loads applied to the at least one joint. A controller is adapted to calculate a position of the implement arm based on signals received from the at least one position and load sensor. The calculated position takes into account shifting of the implement arm caused by clearances existing at the at least one joint between the mating components of the implement arm.Type: ApplicationFiled: October 8, 2003Publication date: June 17, 2004Applicant: Caterpillar Inc.Inventors: Stephen Colburn, Paul C. Pawelski
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Patent number: 6234758Abstract: A variable volume side branch is provided or attenuating fluid noise in a hydraulic system having a fluid pump and includes a variable volume fluid container having a fluid inlet and a fluid outlet. The fluid container is operable to change the volumetric thereof and to thereby attenuate fluid noise in a hydraulic system in response to changes in fluid pump speed. The fluid inlet of the variable volume fluid container is in fluid communication with a fluid pump and control of the fluid container volumetric is accomplished through the use of a speed sensor, a controller and various actuating mechanisms. The speed sensor determines fluid pump speed and transmits a signal indicative thereof to a controller coupled thereto. The controller is operable to receive an input signal from the speed sensor and to output an appropriate signal to the actuating mechanism to change the volumetric length of the fluid container in response to the input signal.Type: GrantFiled: December 1, 1999Date of Patent: May 22, 2001Assignee: Caterpillar Inc.Inventor: Paul C. Pawelski
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Patent number: 6119579Abstract: A fluid cylinder assembly for a work machine includes a fluid cylinder having a housing which includes a first end wall, a second end wall, and a cylindrical side wall which collectively cooperate so as to define a piston chamber. The fluid cylinder also includes a piston housed for translation within the piston chamber, and a rod which extends through an opening defined in the second end wall. An ultrasonic transducer is secured to the cylindrical side wall of the fluid cylinder for transmitting ultrasonic vibrations into the piston chamber during a first time period and receiving ultrasonic vibrations from the piston chamber during a second time period. A control circuit is operatively coupled to the transducer. The control circuit generates a trigger signal which causes the transducer to transmit the ultrasonic vibrations during the first time period. The control circuit analyzes returned energy or echoes from within the piston chamber in order to determine piston location within the piston chamber.Type: GrantFiled: March 20, 1998Date of Patent: September 19, 2000Assignee: Caterpillar Inc.Inventor: Paul C. Pawelski