公开(公告)号：US20230410277A1

公开(公告)日：2023-12-21

申请号：US17840886

申请日：2022-06-15

Applicant: Xerox Corporation ,  Palo Alto Research Center Incorporated

Inventor： Christoforos Somarakis ,  Robert R. Price ,  Svyatoslav Korneev ,  Matt Patterson ,  Adrian Lew ,  Brendan Mcnamara ,  Eli Wilson

IPC: G06T7/00 ,  G06T7/194 ,  G06V10/25 ,  G06V10/40 ,  G06T7/11 ,  G05B19/4093

CPC classification number: G06T7/0004 ,  G06T7/194 ,  G06V10/25 ,  G06V10/40 ,  G06T7/11 ,  G05B19/40932 ,  G06T2207/30144 ,  G06T2200/24 ,  G05B2219/36175

Abstract: Techniques for determining print quality for a 3D printer are disclosed. An example method includes obtaining an image of a stream of material jetted from a nozzle of the 3D printer, and binarizing the image to distinguish background features from foreground features contained in the image. The method also includes identifying elements of jetted material in the foreground features, and computing statistical data characterizing the identified elements. The method also includes generating a quality score of jetting quality based on the statistical data and controlling the 3D printer based on the quality score. The quality score indicates a degree to which the elements of jetted material form droplets of a same size, shape, alignment, and jetting frequency.

公开(公告)号：US11921488B2

公开(公告)日：2024-03-05

申请号：US17122404

申请日：2020-12-15

Applicant: XEROX CORPORATION

Inventor： Ion Matei ,  Johan de Kleer ,  Christoforos Somarakis

IPC: G06F30/398 ,  G05B13/04 ,  G05B19/402 ,  G06T1/20 ,  H04N9/31

CPC classification number: G05B19/402 ,  G05B13/048 ,  G06T1/20 ,  H04N9/31 ,  G05B2219/41345

Abstract: System and method that to shape micro-object density distribution (how densely the micro-objects are assembled in particular spatial regions) are provided. A high speed camera tracks existing object density distribution. An array of photo-transistor-controlled electrodes is used to generate a dynamic potential energy landscape for manipulating objects with both DEP and EP forces, and a video projector is used actuate the array. One or more computing devices are used to: process images captured by the camera to estimate existing density distribution of objects; receive a desired density distribution of micro-objects; define a model describing a variation of micro-object density over time due to capacitance-based interactions; generate a sequence of electrode potential that when generated would minimize error between the existing density distribution and a desired density distribution; and use the sequences of electrode potentials to actuate the electrodes.

公开(公告)号：US20220410273A1

公开(公告)日：2022-12-29

申请号：US17356627

申请日：2021-06-24

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

Inventor： Robert R. Price ,  Raja Bala ,  Svyatoslav Korneev ,  Christoforos Somarakis ,  Matthew Shreve ,  Adrian Lew ,  Palghat Ramesh

IPC: B22F10/80 ,  G06T17/00 ,  G06K9/00 ,  G06K9/62 ,  G06T7/64 ,  G06K15/02 ,  G06T7/00 ,  G05B13/04 ,  G05B13/02 ,  B22D23/00 ,  B22F10/22 ,  B22F12/90 ,  B33Y30/00 ,  B33Y50/00

Abstract: A three-dimensional (3D) printer includes a nozzle and a camera configured to capture a real image or a real video of a liquid metal while the liquid metal is positioned at least partially within the nozzle. The 3D printer also includes a computing system configured to perform operations. The operations include generating a model of the liquid metal positioned at least partially within the nozzle. The operations also include generating a simulated image or a simulated video of the liquid metal positioned at least partially within the nozzle based at least partially upon the model. The operations also include generating a labeled dataset that comprises the simulated image or the simulated video and a first set of parameters. The operations also include reconstructing the liquid metal in the real image or the real video based at least partially upon the labeled dataset.

公开(公告)号：US11919241B1

公开(公告)日：2024-03-05

申请号：US17185826

申请日：2021-02-25

Applicant: XEROX CORPORATION

Inventor： Christoforos Somarakis ,  Svyatoslav Korneev ,  Saigopal Nelaturi ,  Adrian Lew

IPC: B29C64/386 ,  B22F10/80 ,  B22F12/53 ,  B29C64/209 ,  B33Y30/00 ,  B33Y50/00 ,  G06F30/10 ,  G06F30/20

CPC classification number: B29C64/386 ,  B22F10/80 ,  B33Y50/00 ,  G06F30/10 ,  G06F30/20 ,  B22F12/53 ,  B29C64/209 ,  B33Y30/00

Abstract: A method is disclosed for designing a nozzle for jetting printing material in a printing system including selecting a surface tension and viscosity of a printing material at a jetting temperature, selecting a drop volume of the printing material, and constructing a constricted axisymmetric dissipative section of the nozzle, which may include defining a length of the constricted axisymmetric dissipative section and defining a cross-sectional area of the constricted axisymmetric dissipative section. Other methods are disclosed involving receiving an input for a drop volume of the printing material, constructing a simulation of a constricted dissipative section of the nozzle by defining a length of the constricted dissipative section with respect to an orifice length and defining a cross-sectional area of the constricted dissipative section, and outputting the simulation of the constricted dissipative section to a display device and displaying on the display device an image representing the constricted dissipative section.

公开(公告)号：US20230410278A1

公开(公告)日：2023-12-21

申请号：US17840920

申请日：2022-06-15

Applicant: Xerox Corporation ,  Palo Alto Research Center Incorporated

Inventor： Christoforos Somarakis ,  Robert R. Price ,  Svyatoslav Korneev ,  Matt Patterson ,  Adrian Lew ,  Brendan Mcnamara ,  Eli Wilson

IPC: G06T7/00 ,  G06T7/136 ,  G06T7/194 ,  B33Y50/00 ,  B29C64/386

CPC classification number: G06T7/0004 ,  G06T7/136 ,  G06T7/194 ,  B33Y50/00 ,  B29C64/386 ,  G06T2207/30144

Abstract: Image processing techniques for determining print quality for a 3D printer are disclosed. An example method includes obtaining an image of material jetted from a nozzle of the 3D printer. The method also includes binarizing the image to distinguish background features from foreground features contained in the image. The method also includes determining, by a processing device, a jetting quality based on the binarized image.

公开(公告)号：US20220414380A1

公开(公告)日：2022-12-29

申请号：US17356604

申请日：2021-06-24

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

Inventor： Robert R. Price ,  Raja Bala ,  Svyatoslav Korneev ,  Christoforos Somarakis ,  Matthew Shreve ,  Adrian Lew ,  Palghat Ramesh

IPC: G06K9/00 ,  G06K9/62 ,  G06N3/08 ,  B41J2/045

Abstract: A method includes defining a model for a liquid while the liquid is positioned at least partially within a nozzle of a printer. The method also includes synthesizing video frames of the liquid using the model to produce synthetic video frames. The method also includes generating a labeled dataset that includes the synthetic video frames and corresponding model values. The method also includes receiving real video frames of the liquid while the liquid is positioned at least partially within the nozzle of the printer. The method also includes generating an inverse mapping from the real video frames to predicted model values using the labeled dataset. The method also includes reconstructing the liquid in the real video frames based at least partially upon the predicted model values.

公开(公告)号：US12198323B2

公开(公告)日：2025-01-14

申请号：US17840886

申请日：2022-06-15

Applicant: Xerox Corporation ,  Palo Alto Research Center Incorporated

Inventor： Christoforos Somarakis ,  Robert R. Price ,  Svyatoslav Korneev ,  Matt Patterson ,  Adrian Lew ,  Brendan Mcnamara ,  Eli Wilson

IPC: G06T7/00 ,  G05B19/4093 ,  G06T7/11 ,  G06T7/194 ,  G06V10/25 ,  G06V10/40

Abstract: Techniques for determining print quality for a 3D printer are disclosed. An example method includes obtaining an image of a stream of material jetted from a nozzle of the 3D printer, and binarizing the image to distinguish background features from foreground features contained in the image. The method also includes identifying elements of jetted material in the foreground features, and computing statistical data characterizing the identified elements. The method also includes generating a quality score of jetting quality based on the statistical data and controlling the 3D printer based on the quality score. The quality score indicates a degree to which the elements of jetted material form droplets of a same size, shape, alignment, and jetting frequency.

公开(公告)号：US12042991B2

公开(公告)日：2024-07-23

申请号：US17185814

申请日：2021-02-25

Applicant: XEROX CORPORATION

Inventor： Christoforos Somarakis ,  Svyatoslav Korneev ,  Saigopal Nelaturi ,  Adrian Lew

IPC: B29C64/20 ,  B22D23/00 ,  B22F12/53 ,  B29C64/112 ,  B29C64/209 ,  B33Y30/00

CPC classification number: B29C64/209 ,  B22D23/003 ,  B22F12/53 ,  B29C64/112 ,  B33Y30/00

Abstract: A nozzle for a printing system is disclosed. The nozzle includes a tank in communication with a source of printing material. The nozzle also includes a constricted dissipative section in communication with the tank, which may include an elongated internal channel. The nozzle may also include a shaping tip in communication with the constricted dissipative section may include an exit orifice. The constricted dissipative section may be axisymmetric and may include at least three internal channels not in communication with one another. Also disclosed is an array of nozzles for a printing system including a plurality of nozzles, with each nozzle including a tank in communication with a source of printing material, a constricted dissipative section in communication with the tank and configured to obstruct fluid flow and having an elongated internal channel, and a shaping tip in communication with the constricted dissipative section may include an exit orifice.

公开(公告)号：US12002265B2

公开(公告)日：2024-06-04

申请号：US17356604

申请日：2021-06-24

Applicant: XEROX CORPORATION

Inventor： Robert R. Price ,  Raja Bala ,  Svyatoslav Korneev ,  Christoforos Somarakis ,  Matthew Shreve ,  Adrian Lew ,  Palghat Ramesh

IPC: G06V20/40 ,  B41J2/045 ,  G06F18/214 ,  G06F18/2413 ,  G06N3/08

CPC classification number: G06V20/46 ,  B41J2/04536 ,  G06F18/214 ,  G06F18/24147 ,  G06N3/08 ,  G06V20/49 ,  G06V2201/07

Abstract: A method includes defining a model for a liquid while the liquid is positioned at least partially within a nozzle of a printer. The method also includes synthesizing video frames of the liquid using the model to produce synthetic video frames. The method also includes generating a labeled dataset that includes the synthetic video frames and corresponding model values. The method also includes receiving real video frames of the liquid while the liquid is positioned at least partially within the nozzle of the printer. The method also includes generating an inverse mapping from the real video frames to predicted model values using the labeled dataset. The method also includes reconstructing the liquid in the real video frames based at least partially upon the predicted model values.

公开(公告)号：US11958112B2

公开(公告)日：2024-04-16

申请号：US17356627

申请日：2021-06-24

Applicant: XEROX CORPORATION

Inventor： Robert R. Price ,  Raja Bala ,  Svyatoslav Korneev ,  Christoforos Somarakis ,  Matthew Shreve ,  Adrian Lew ,  Palghat Ramesh

IPC: B22F10/80 ,  B22D23/00 ,  B22F10/22 ,  B22F12/90 ,  B33Y30/00 ,  B33Y50/00 ,  G05B13/02 ,  G05B13/04 ,  G06F18/214 ,  G06K15/02 ,  G06T7/00 ,  G06T7/64 ,  G06T17/00 ,  G06V20/20 ,  G06V20/64

CPC classification number: B22F10/80 ,  B22D23/003 ,  B22F10/22 ,  B22F12/90 ,  B33Y30/00 ,  B33Y50/00 ,  G05B13/027 ,  G05B13/042 ,  G06F18/214 ,  G06K15/028 ,  G06T7/0004 ,  G06T7/64 ,  G06T17/00 ,  G06V20/20 ,  G06V20/64 ,  G06T2207/10016 ,  G06T2207/30136 ,  G06T2207/30144

Abstract: A three-dimensional (3D) printer includes a nozzle and a camera configured to capture a real image or a real video of a liquid metal while the liquid metal is positioned at least partially within the nozzle. The 3D printer also includes a computing system configured to perform operations. The operations include generating a model of the liquid metal positioned at least partially within the nozzle. The operations also include generating a simulated image or a simulated video of the liquid metal positioned at least partially within the nozzle based at least partially upon the model. The operations also include generating a labeled dataset that comprises the simulated image or the simulated video and a first set of parameters. The operations also include reconstructing the liquid metal in the real image or the real video based at least partially upon the labeled dataset.