公开(公告)号：WO2020193422A1

公开(公告)日：2020-10-01

申请号：PCT/EP2020/057835

申请日：2020-03-20

Applicant: ABB SCHWEIZ AG

Inventor： WILDERMUTH, Stephan ,  KAUL, Holger ,  KOZEL, Tomas ,  BOYACI, Aydin

IPC: G06T7/00 ,  G06T7/11 ,  G06T7/136 ,  G06T7/194 ,  G06T7/62

Abstract: The present invention relates to an apparatus for hot spot sensing, the apparatus comprising an input unit, a processing unit, and an output unit. The input unit is configured to provide the processing unit with an image of an object that has a hot spot, wherein image data of the image comprises image data of the hot spot, and wherein the image was acquired by a camera. The processing unit is configured to determine a number of pixels in the image corresponding to a size of the hot spot. The processing unit is configured to determine an average temperature for the hot spot, the determination comprising utilization of pixel values of the pixels in the image corresponding to the size of the hot spot and the number of pixels in the image corresponding to the size of the hot spot. The processing unit is configured to determine a surrounding temperature in the image, the determination comprising utilization of at least one pixel in the image different to the pixels in the image corresponding to the size of the hot spot. The processing unit is configured to determine a corrected temperature for the hot spot, the determination comprising utilization of a value of a correction factor, the average temperature for the hot spot and the surrounding temperature.

公开(公告)号：EP3933418A1

公开(公告)日：2022-01-05

申请号：EP20183241.7

申请日：2020-06-30

Applicant: ABB Schweiz AG

Inventor： HENCKEN, Kai ,  MARET, Yannick ,  GEBHARDT, Jörg ,  KAUL, Holger ,  LEHMANN, Jörg ,  KRIVDA, Andrej

IPC: G01R31/12 ,  G01R19/04

Abstract: The present disclosure provides a method for detecting an electrical discharge (1) in an electrical apparatus (5), the method comprises: Sensing an electromagnetic wave (4) using an electrical sensor (101) and generating an electric signal (SE) for a predetermined time period (T1); Sensing an acoustic wave (3) using an acoustic sensor (102) and generating an acoustic signal (SA) for the predetermined time period (T1), said acoustic sensor (102) being associated with at least one compartment (5a) of the electrical apparatus (5); Generating electrical data (201) based on a quasi-periodic characteristic of electric peak sequences of said electrical signal (SE); Generating acoustic data (202) based on a quasi-periodic characteristic of acoustic peak sequences of said acoustic signal (SA); wherein the electrical data (201) is combined with the acoustic data (202) to provide an operation status of the at least one compartment (5a).

公开(公告)号：EP3943957A1

公开(公告)日：2022-01-26

申请号：EP20186742.1

申请日：2020-07-20

Applicant: ABB Schweiz AG

Inventor： HENCKEN, Kai ,  KAUL, Holger ,  GEBHARDT, Jörg ,  MARET, Yannick ,  KRIVDA, Andrej

IPC: G01R31/12

Abstract: The present disclosure provides a detection system (100, 200) for detecting an electrical discharge in an electrical apparatus, and a method for detecting an electrical discharge in an electrical apparatus. The detection system (100, 200) includes a first sensing device (101, 101a) configured for sensing an acoustic wave (3) and an electromagnetic wave (4) and generating a first combined signal (S C , S C1 ) and a signal processing device (110) configured for processing the first combined signal (S C , S C1 ) to determine the occurrence and properties of an electrical discharge (1). In further embodiments, the detection system (200) further includes at least a second sensing device (101b) configured for sensing the acoustic wave (3) and the electromagnetic wave (4) and generating a second combined signal (S C2 ), wherein the signal processing device (110) is further configured for comparing the first combined signal (S C1 ) and the second combined signal (S C2 ).

公开(公告)号：EP4235591A1

公开(公告)日：2023-08-30

申请号：EP22159066.4

申请日：2022-02-28

Applicant: ABB SCHWEIZ AG

Inventor： GITZEL, Ralf ,  DIX, Marcel ,  KAUL, Holger ,  KOZEL, Tomas

IPC: G06V10/143 ,  G06V10/28 ,  G06V10/82 ,  G06V20/52 ,  G06V10/74 ,  G06V10/774

Abstract: The present invention relates to a system for monitoring a switchgear, the system comprising:
- an infrared camera;
- a processing unit; and
- an output unit.
The infrared camera is configured to acquire an infrared image of the switchgear. The processing unit is configured to convert the infrared image into a binary image. Pixels in the infrared image having a temperature equal to or above a first threshold value are given the same first value. Pixels in the infrared image having a temperature below the first threshold value are given the same second value. The processing unit is configured to implement a Siamese neural network to determine if a hot spot exists in the infrared image. The determination by the Siamese neural network comprises analysis by the Siamese neural network of the binary image and a reference binary image. The reference binary image was generated from a reference infrared image of the switchgear or of a reference switchgear. Pixels in the reference infrared image having a temperature equal to or above a second threshold value were given the same first value. Pixels in the reference infrared image having a temperature below the second threshold value were given the same second value to generate the reference binary image. The output unit is configured to output an indication of a fault in the switchgear on the basis that a hot spot has been determined to exist in the infrared image.

公开(公告)号：EP3907502A1

公开(公告)日：2021-11-10

申请号：EP20173774.9

申请日：2020-05-08

Applicant: ABB Schweiz AG

Inventor： GEBHARDT, Jörg ,  KAUL, Holger ,  HENCKEN, Kai

IPC: G01N29/14 ,  G10K11/00 ,  H01H9/50 ,  H04R1/08 ,  H04R1/22 ,  H04R1/34 ,  H01H33/26

Abstract: A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.