公开(公告)号：US20240369480A1

公开(公告)日：2024-11-07

申请号：US18026708

申请日：2021-08-17

Applicant: Sikora AG

Inventor： Harald Sikora ,  Armin Holle

IPC: G01N21/41 ,  G01N21/3581

Abstract: A method for determining a refractive index in a surface region of an object from a production system which has not cooled to an ambient temperature includes emitting terahertz radiation from a transmitter at an angle of incidence to the surface region of the object. The terahertz radiation is reflected from the surface region of the object and received by a receiver. The refractive index of the surface region of the object from a ratio of the emitted and reflected terahertz radiation is determined using an evaluator in communication with the transmitter and the receiver. The influence of surface properties of the object on a portion of the reflected terahertz radiation is taken into account when determining the refractive index.

公开(公告)号：US20220268576A1

公开(公告)日：2022-08-25

申请号：US17627456

申请日：2020-06-20

Applicant: Sikora AG

Inventor： Armin Holle ,  Christian Frank

IPC: G01B15/02 ,  G01B15/04

Abstract: A device for measuring a strand that is tubular includes a first radiation source to emit terahertz radiation in a first measurement region from an inside onto an inner surface of the strand. A first radiation receiver receives terahertz radiation reflected by the strand in a second measurement region. A first evaluation apparatus determines at least one geometric parameter of the strand in the first measurement region. A second radiation source emits terahertz radiation in the second measurement region from an outside onto an outer surface of the strand. A second radiation receiver receives terahertz radiation reflected by the strand in the second measurement region. A second evaluation apparatus determines at least one geometric parameter of the strand in the second measurement region. A third evaluation apparatus determines a change in the at least one geometric parameter of the strand between the first and second measurement regions.

公开(公告)号：US12064911B2

公开(公告)日：2024-08-20

申请号：US16977227

申请日：2019-02-26

Applicant: Sikora AG

Inventor： Armin Holle

IPC: B29C48/92 ,  B29C48/90 ,  B29L23/00 ,  B29L31/00 ,  G01B15/02 ,  G01B15/04

CPC classification number: B29C48/92 ,  B29C48/903 ,  G01B15/02 ,  G01B15/04 ,  B29C2948/92123 ,  B29C2948/92152 ,  B29C2948/92171 ,  B29C2948/92447 ,  B29C2948/92857 ,  B29L2023/00 ,  B29L2031/731

Abstract: A method for measuring a tubular strand exiting from an extrusion device comprises directing electromagnetic radiation from an inside of the tubular strand to an inner side of a tubular strand. The electromagnet radiation is radiated from at least one radiation source within a frequency range from 1 GHz to 6000 GHz. The electromagnetic radiation is reflected off of the tubular strand and received by at least one radiation receiver. A value for at least one of a diameter, a wall thickness, and a deviation in shape of the tubular strand is determined from the electromagnetic radiation received by at least one radiation receiver.

公开(公告)号：US12055386B2

公开(公告)日：2024-08-06

申请号：US17627456

申请日：2020-06-20

Applicant: Sikora AG

Inventor： Armin Holle ,  Christian Frank

IPC: G01N21/3581 ,  G01B15/02 ,  G01B15/04

CPC classification number: G01B15/02 ,  G01B15/04 ,  G01N21/3581

Abstract: A device for measuring a strand that is tubular includes a first radiation source to emit terahertz radiation in a first measurement region from an inside onto an inner surface of the strand. A first radiation receiver receives terahertz radiation reflected by the strand in a second measurement region. A first evaluation apparatus determines at least one geometric parameter of the strand in the first measurement region. A second radiation source emits terahertz radiation in the second measurement region from an outside onto an outer surface of the strand. A second radiation receiver receives terahertz radiation reflected by the strand in the second measurement region. A second evaluation apparatus determines at least one geometric parameter of the strand in the second measurement region. A third evaluation apparatus determines a change in the at least one geometric parameter of the strand between the first and second measurement regions.

公开(公告)号：US20240068939A1

公开(公告)日：2024-02-29

申请号：US18270648

申请日：2021-12-20

Applicant: Sikora AG

Inventor： Harold Sikora ,  Armin Holle ,  Kolja Tobias Schuh

IPC: G01N21/3581 ,  G01N21/89 ,  G01N21/892 ,  G01N21/954

CPC classification number: G01N21/3581 ,  G01N21/8914 ,  G01N21/892 ,  G01N21/954 ,  G01N2021/8918

Abstract: A method is provided for detecting a defect of a strand-like product conveyed in a conveying direction at a conveying speed of more than 50 m/min. The method includes determining a frequency of a lateral movement of the strand-like product. The lateral movement occurs in a direction that is transverse to the conveying direction. Terahertz radiation is emitted at a wavelength by at least one transmitter onto the strand-like product conveyed in the conveying direction. The terahertz radiation is reflected by the strand-like product and received by at least one receiver. A temporary change in the terahertz radiation received by the at least one receiver is detected. A defect in the strand-like product is inferred when the temporary change in the terahertz radiation received by the at least one receiver is higher than the frequency of the lateral movement of the strand-like product.

公开(公告)号：US20230128231A1

公开(公告)日：2023-04-27

申请号：US17908614

申请日：2021-02-23

Applicant: Sikora AG

Inventor： Armin Holle ,  Tuncer Kaya

IPC: G01P3/36

Abstract: A device for determining at least one of a speed and a length of a product. The device includes a laser for irradiating a surface of the product, a detector apparatus to detect laser radiation backscattered from the surface, a first sensor with a first transmission grid arranged in front of the first sensor and a second sensor. A first beam splitter splits laser radiation backscattered from the product into laser radiation conducted to at least one of the first sensor and to the second sensor. An evaluation apparatus determines at least one of: (i) the speed; and (ii) the length of the product. A third sensor is provided as is a second beam splitter that splits laser radiation coming from the first beam splitter to at least one of the sensors. The evaluation apparatus eliminates a direct component of the measurement signal received by the first sensor.

公开(公告)号：US20210114278A1

公开(公告)日：2021-04-22

申请号：US16977227

申请日：2019-02-26

Applicant: Sikora AG

Inventor： Armin Holle

IPC: B29C48/92 ,  G01B11/10 ,  G01B11/06 ,  G01B11/12 ,  G01B11/24 ,  G01B15/02 ,  G01B15/04 ,  B29C48/90

Abstract: The invention relates to a method for measuring a tubular strand exiting from an extrusion device, wherein electromagnetic radiation is directed from at least one radiation source within a frequency range of 1 GHz to 6000 GHz from the inside to the inner side of the tubular strand, wherein electromagnetic radiation reflected by the tubular strand is received by at least one radiation receiver, and wherein the diameter, and/or the wall thickness, and/or deviations in shape of the tubular strand are ascertained from the received electromagnetic radiation. Moreover, the invention relates to a corresponding device.