Sensor unit and method for monitoring the state of fasteners

摘要

Sensor unit (30) for monitoring the state of fasteners, such as ratchet straps, chains, wires, ropes, bars or similar, which are being used for fastening and/or securing and/or anchoring one or more objects (20), which fasteners preferably includes fastening means (14, 104) and means (15, 100) for tensioning of the fasteners. The sensor unit (30) includes one or more measuring elements (32) for measuring tension force and/or tension and/or pressure and/or bending moment and/or shear force for the fastener and/or fastening means (14, 104) of the fastener and/or anchoring devices (22) for fasteners for monitoring the state of the fasteners.

主权项

1. A sensor unit for remotely monitoring the state of fasteners which are being used for fastening, securing, and anchoring one or more objects, which fasteners include a fastening means for tensioning the fasteners, which fastening means, means for tensioning the fasteners, connection links and anchoring devices are provided with bolts, said sensor unit comprising:
at least one deformable sleeve, to which deformable sleeve at least one measuring element is arranged, wherein said deformable sleeve has a mainly circular shape in default state, wherein the deformable sleeve is arranged for surrounding the bolt or for arrangement in a loop formed at the end of flexible fasteners surrounding the bolt, such that the sleeve is not responsible for transmission of forces in the fasteners, which deformable sleeve is arranged for being asymmetrically deformed by a combination of axial and radial forces acting between the bolt and fasteners or between parts of the fasteners forming the loop or eye at the end of the fasteners and thereby measuring tensioning force straight after tensioning or static tension or pressure acting axially on the fasteners at a given point in time without affecting the fasteners.