公开(公告)号：AU2002342030A1

公开(公告)日：2003-04-22

申请号：AU2002342030

申请日：2002-10-09

Applicant: ABB INC

Inventor： HELLSTROM AKE ARVID

IPC: G01B21/08 ,  G01B21/30 ,  G01N21/57 ,  G01N21/89 ,  G01N27/72 ,  G01N33/34 ,  G01B5/00 ,  G01B7/06 ,  G01N21/86

Abstract: A non-contact system for sensing a property of a passing web of material includes first and second sensors positioned on opposite sides of the web. The opposing sensors are repelled from the web and each other by gas bearings formed between the sensors and the web and attracted to each other by one or more polarized magnets embedded in the sensors. The resultant net force properly spaces the sensors from the web to ensure reliable and accurate sensing. The repelling force enables the sensors to react substantially instantaneously to changes in the pass line of the web. An automatic actuator/retractor can be provided to withdraw the sensors, extend the sensors to or retract the sensors from adjacent the feed path.

公开(公告)号：CA2460601C

公开(公告)日：2010-09-21

申请号：CA2460601

申请日：2002-10-09

Applicant: ABB INC

Inventor： HELLSTROM AKE ARVID

IPC: G01N33/00 ,  G01B21/08 ,  G01B21/30 ,  G01N21/57 ,  G01N21/86 ,  G01N21/89 ,  G01N27/72 ,  G01N33/34

Abstract: A non-contact system (10) for sensing a property of a passing web of material (W) includes first and second sensors (14, 16) positioned on opposite sides of the web. The opposing sensors are repelled from the web and each other by gas bearings (22, 24) formed between the sensors and the web and attracted to each other by one or more polarized magnets (26, 25a, 25d, 25a', 27a-27d, 27a') embedded in the sensors. The resultant net force properly spaces the sensors from the web to ensure reliable and accurate sensing. The repelling force enables the sensors to react substantially instantaneously to changes in the pass line of the web. An automatic actuator/retractor (30) can be provided to withdraw the sensors, extend the sensors to or retract the sensors from adjacent the feed path.

公开(公告)号：DE60232671D1

公开(公告)日：2009-07-30

申请号：DE60232671

申请日：2002-10-09

Applicant: ABB INC

Inventor： HELLSTROM AKE ARVID

IPC: G01B5/00 ,  G01B21/08 ,  G01B21/30 ,  G01N21/57 ,  G01N21/89 ,  G01N27/72 ,  G01N33/34

Abstract: A non-contact system for sensing a property of a passing web of material includes first and second sensors positioned on opposite sides of the web. The opposing sensors are repelled from the web and each other by gas bearings formed between the sensors and the web and attracted to each other by one or more polarized magnets embedded in the sensors. The resultant net force properly spaces the sensors from the web to ensure reliable and accurate sensing. The repelling force enables the sensors to react substantially instantaneously to changes in the pass line of the web. An automatic actuator/retractor can be provided to withdraw the sensors, extend the sensors to or retract the sensors from adjacent the feed path.

公开(公告)号：CA2460601A1

公开(公告)日：2003-04-17

申请号：CA2460601

申请日：2002-10-09

Applicant: ABB INC

Inventor： HELLSTROM AKE ARVID

IPC: G01B21/08 ,  G01B21/30 ,  G01N21/57 ,  G01N21/89 ,  G01N27/72 ,  G01N33/34 ,  G01N33/00 ,  G01N21/86

Abstract: A non-contact system (10) for sensing a property of a passing web of materia l (W) includes first and second sensors (14, 16) positioned on opposite sides of the web. The opposing sensors are repelled from the web and each other by ga s bearings (22, 24) formed between the sensors and the web and attracted to ea ch other by one or more polarized magnets (26, 25a, 25d, 25a', 27a-27d, 27a') embedded in the sensors. The resultant net force properly spaces the sensors from the web to ensure reliable and accurate sensing. The repelling force enables the sensors to react substantially instantaneously to changes in the pass line of the web. An automatic actuator/retractor (30) can be provided t o withdraw the sensors, extend the sensors to or retract the sensors from adjacent the feed path.