Disclosed is a pollution and torque measuring device for busbar additional connection modules that detects the degree of pollution occurring in the additional connection modules that allow busbar modules to be attached to each other in electrical distribution systems known as busbars and whether the additional is tightened with sufficient torque.

Disclosed is a pollution and torque measuring device for busbar additional connection modules that detects the degree of pollution occurring in the additional connection modules that allow busbar modules to be attached to each other in electrical distribution systems known as busbars and whether the additional is tightened with sufficient torque.

Torque tool (200) configured for making up and breaking out joints (1a, 1b) in a riser (100), the tool (200) comprising: a tool body (3) and a tool head (4), the tool head (4) having a socket (4′) configured to receive a head (14) of a bolt (2) and apply a torque on the bolt (2), a torque sensor (20) operable to measure the torque applied on the bolt (2), and a pre-tension sensor (21) operable to measure a pre-tension in the longitudinal extension of the bolt (2) when the bolt (2) is received in the tool head (4). There is also provided a method for pre-tensioning bolted riser joints (1a, 1b) comprising a plurality of bolts (2), a method of managing a plurality of bolts (2) for riser joints (1a, 1b), a method of managing a plurality of bolts (2) for riser joints (1a, 1b), and a riser connector (101).

The present disclosure generally relates to a method for making up a tubular joint. The method includes rotating a first tubular relative to a second tubular to engage the first and second tubulars while measuring a torque between the first and second tubulars, calculating a set point of a relative rotational speed between the first and second tubulars using the measured torque, and using the calculated set point with a closed-loop controller to control the relative rotational speed between the first and second tubulars.

The present disclosure generally relates to a method for making up a tubular joint. The method includes rotating a first tubular relative to a second tubular to engage the first and second tubulars while measuring a torque between the first and second tubulars, calculating a set point of a relative rotational speed between the first and second tubulars using the measured torque, and using the calculated set point with a closed-loop controller to control the relative rotational speed between the first and second tubulars.

There is provided a sensor unit for a fastener assembly, the sensor unit comprising a mounting arranged to rigidly attach the sensor unit to, or adjacent to, a fastener assembly; and a sensor, that is an optical flow sensor or an inductive sensor, configured to sense movement of the fastener assembly. The sensor unit may comprise a processor arranged to process the output of the sensor to detect loosening of the fastener assembly and to output a signal representing the status of the fastener assembly. The sensor unit may comprise a wireless communication unit arranged to communicate the signal.

A screw fastening apparatus for fastening a screw member having a bearing surface with respect to a member to be fastened by rotating the screw member from a theoretical seating point to a target rotational angle, including a rotational angle sensor which senses rotational angle values of the screw member for fastening the screw member, a torque detector which detects torque values for fastening the screw member, a torque value difference detector which detects a plurality of torque value differences, each of the torque value differences is a difference of the torque values detected at intervals of a constant rotational angle, a slip detector which detects a slip of the screw member with respect to the member to be fastened, from an average of the torque value differences, and a screw fastening discontinuing unit which instructs to discontinue the screw fastening when the slip is detected by the slip detector.

A screw fastening apparatus for fastening a screw member having a bearing surface with respect to a member to be fastened by rotating the screw member from a theoretical seating point to a target rotational angle, including a rotational angle sensor which senses rotational angle values of the screw member for fastening the screw member, a torque detector which detects torque values for fastening the screw member, a torque value difference detector which detects a plurality of torque value differences, each of the torque value differences is a difference of the torque values detected at intervals of a constant rotational angle, a slip detector which detects a slip of the screw member with respect to the member to be fastened, from an average of the torque value differences, and a screw fastening discontinuing unit which instructs to discontinue the screw fastening when the slip is detected by the slip detector.

A torque sensor includes: a first area having a first surface and a second surface opposite the first surface; a second area provided around the first area; a plurality of beams connecting the first area to the second area; and a detector provided on the first surface of the first area and configured to detect torque applied between the first area and the second area. The detector includes: an insulation film layered on the first area; and strain gauges layered on the insulation film and being deformable in response to torque. The second surface of the first area is provided with screw holes that do not reach the first surface and into which fasteners are respectively screwed. A thickness defined between a bottom of each of the screw holes and the first surface is equal to or more than one fourth of a diameter of each of the screw holes.

A torque sensor includes: a first area having a first surface and a second surface opposite the first surface; a second area provided around the first area; a plurality of beams connecting the first area to the second area; and a detector provided on the first surface of the first area and configured to detect torque applied between the first area and the second area. The detector includes: an insulation film layered on the first area; and strain gauges layered on the insulation film and being deformable in response to torque. The second surface of the first area is provided with screw holes that do not reach the first surface and into which fasteners are respectively screwed. A thickness defined between a bottom of each of the screw holes and the first surface is equal to or more than one fourth of a diameter of each of the screw holes.