公开(公告)号：US20220063200A1

公开(公告)日：2022-03-03

申请号：US17413723

申请日：2019-01-13

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Tod Heiles ,  Luke Bockman ,  Gary J. Dispoto ,  Md Abdullah Al Hafiz Khan ,  Ingeborg Tastl

IPC: B29C64/393 ,  B29C64/188 ,  B29C64/218 ,  B29C64/236 ,  B29C64/268 ,  G06T7/00 ,  B33Y30/00 ,  B33Y40/20 ,  B33Y50/02

Abstract: A grazing light system for detecting three-dimensional (3D) Additive Manufacturing Device (3D) part lift and drag may include a grazing light directed along an x, y plane of a build region to illuminate the surface of the build region, an image capture device to capture an image of the build region as illuminated by the grazing light, and an image analysis module to detect protrusions of the part along the x, y plane based on variations of luminance information within data representing the image.

公开(公告)号：US20200247110A1

公开(公告)日：2020-08-06

申请号：US16753267

申请日：2018-01-18

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Tod Heiles ,  Sunil Kothari ,  Juan Carlos Catana ,  Brent Ewald ,  Jun Zeng ,  Gary J. Dispoto

IPC: B33Y10/00 ,  B33Y30/00

Abstract: A system for forming an object, the system including: a carriage, wherein the carriage moves above an area for forming the object and laterally with respect to the area, the carriage comprising an electromagnetic radiation source to induce heating of material in the area; a thermal imaging device to image the area, wherein the thermal imaging device captures a plurality of sequential images; and a processor, wherein the processor uses the plurality of sequential images to create a temperature map of the area which includes compensation for the cooling which occurs during the movement of the carriage lateral to the area.

公开(公告)号：US11969949B2

公开(公告)日：2024-04-30

申请号：US17420074

申请日：2019-01-10

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Kelly Ronk ,  Anthony Powell ,  Jun Zeng ,  Md Abdullah Al Hafiz Khan ,  Tod Heiles ,  Goffril Obegi

IPC: B29C64/393 ,  B29C64/379 ,  B33Y30/00 ,  B33Y50/02 ,  G06T7/00

CPC classification number: B29C64/393 ,  B29C64/379 ,  B33Y30/00 ,  B33Y50/02 ,  G06T7/0004 ,  G06T2207/20084 ,  G06T2207/30164

Abstract: A method of custom print mode generation in a three-dimensional (3D) printing device may include printing a plurality of parts with a plurality of 3D printing devices, the parts each being printed using different process parameters, and capturing a plurality of images of the parts. The method may also include, with an image analysis module, analyzing the images to classify the parts into a plurality of defect gradings, and adjusting a number of the process parameters based on characteristics of the parts identified by a user as undesirable. The examiner may also include, with a recommending module, creating a custom print mode based on the parts defect gradings and adjusted process parameters.

公开(公告)号：US11420395B2

公开(公告)日：2022-08-23

申请号：US16606741

申请日：2018-04-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sunil Kothari ,  Juan Carlos Catana ,  Tod Heiles

IPC: B29C64/393 ,  G06T7/66 ,  B29C64/112 ,  G06T7/00

Abstract: In some examples, with respect to region of interest monitoring and control for additive manufacturing, a blob detection analysis may be performed on first and second component images associated with additive manufacturing of a component, and blobs that remain a same shape and include same centroids on the first and second component images may be identified. A further blob detection analysis may be performed on first and second thermal images associated with the first and second component images, and a determination may be made as to whether one of the identified blobs includes a same shape and a different centroid between the first and second thermal images. Based on a determination that the one of the identified blobs includes the same shape and the different centroid, an indication of a thermal camera misalignment associated with the additive manufacturing may be generated.

公开(公告)号：US11409261B2

公开(公告)日：2022-08-09

申请号：US16077669

申请日：2017-01-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sunil Kothari ,  Kristopher Li ,  Viseth Sean ,  Jun Zeng ,  Lihua Zhao ,  Goffril Obegi ,  Gary J. Dispoto ,  Tod Heiles

IPC: G05B19/4099 ,  B33Y50/02 ,  B29C64/393 ,  G05B6/00 ,  B29C64/386 ,  B22F10/20 ,  B22F10/30

Abstract: In some examples, a distribution of values of a property of a given layer to be printed as part of three-dimensional (3D) printing is predicted, wherein the predicting is based on a distribution of values of the property in a previous layer that has been printed as part of the 3D printing. 3D printing of an object is controlled based on the predicted distribution of values of the property of the given layer.

公开(公告)号：US20210362428A1

公开(公告)日：2021-11-25

申请号：US16606741

申请日：2018-04-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Sunil Kothari ,  Juan Carlos Catana ,  Tod Heiles

IPC: B29C64/393 ,  B29C64/112 ,  G06T7/00 ,  G06T7/66

Abstract: In some examples, with respect to region of interest monitoring and control for additive manufacturing, a blob detection analysis may be performed on first and second component images associated with additive manufacturing of a component, and blobs that remain a same shape and include same centroids on the first and second component images may be identified. A further blob detection analysis may be performed on first and second thermal images associated with the first and second component images, and a determination may be made as to whether one of the identified blobs includes a same shape and a different centroid between the first and second thermal images. Based on a determination that the one of the identified blobs includes the same shape and the different centroid, an indication of a thermal camera misalignment associated with the additive manufacturing may be generated.

公开(公告)号：US20210162662A1

公开(公告)日：2021-06-03

申请号：US17047297

申请日：2018-08-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Sunil Kothari ,  Tod Heiles ,  Gary J Dispoto

IPC: B29C64/209 ,  B29C64/393

Abstract: An example system includes an array of nozzles to deposit a print material for printing a three-dimensional object, a thermal sensor to determine a thermal characteristic at multiple locations of the print material, and a controller. The controller includes a gradient identification portion to identify a location on the print material having a gradient of the thermal characteristic being greater than a predetermined threshold. The controller further includes a nozzle identification portion to identify a nozzle associated with the identified location as an anomalous nozzle.