37results about How to "Eliminate creep" patented technology

In one embodiment of the invention, there is provided a roofing tape for assisting in the installation of a plurality of selected roofing material to a roof section, the selected roofing material having a width, an offset requirement, and a gap requirement; the roofing tape including a front surface; a back surface; a first edge; a second edge; a first indicia disposed on the front surface of the roofing tape, located at a pre-determined distance from the first edge designating the starting position; a second indicia indicating placement of the first course, which is disposed at a location apart from the first indicia, the location being equal to the width of the roofing material plus any required gap space; and a third indicia indicating placement of the second course, which is disposed at a location apart from the first indicia, the location being equal to the width of the roofing material plus any required gap space minus half the width of the roofing material. Methods of using the roofing tape are additionally provided herein.

The invention discloses a spot welding fiber bragg grating strain sensor. The spot welding fiber bragg grating strain sensor comprises a fiber bragg grating strain sensor body and a base body made of high-elasticity alloy materials, wherein the base body comprises a substrate, a left regulating block and a right regulating block, the left regulating block and the right regulating block are connected with the left end and the right end of the base body respectively in an integrated mode, a base body groove is formed in the middle of the position, between the two regulating blocks, of the base body, the outer side of the fiber bragg grating strain sensor body is provided with a packaging layer made of low-melting-point glass powder, and the lower half portion of the packaging layer is connected with the base body groove; the right regulating block is transversely provided with a regulating hole, a regulating bolt penetrates through the regulating hole, and the left end of the regulating bolt abuts against the right side face of the left regulating block; the periphery of the substrate is provided with a rubber layer used for sealing. As the spot welding fiber bragg grating strain sensor is obviously superior to a traditional resistance strain gage, the purpose that the real-time state of strain of an iron tower electric transmission line is known comprehensively for a long time is achieved.

The invention relates to a fiber grating demodulator, which is characterized in that it comprises a scanning light source (1), a coupler (2) with a splitting ratio of 99:1, a PLC splitter module (3), and a plurality of 3dB couplers ( 4), fiber grating array (6), reference optical path (7), data acquisition module (12), main control board (13), industrial computer (17) and display (18), wherein, described reference optical path (7) It includes a first reference grating (8), a second reference grating (9), a third reference grating (10) and a temperature sensor, the temperature sensor is connected to the main control board, the wavelength λ2 of the first reference grating (8) and the second reference grating The wavelength λ3 of the grating (9) is close to one end of the system wavelength, the wavelength λ4 of the third reference grating (10) is close to the other end of the system wavelength, and the ratio of λ4-λ3 to λ3-λ2 is between 4:1 and 7:1 . Compared with the prior art, the present invention uses simple 3 reference gratings and 1 temperature sensor to replace the expensive FP etalon as the reference optical path, which effectively eliminates the creep, hysteresis and drift of the scanning light source. The impact of changes in the output wavelength of the light source on the precision and accuracy of demodulation.

The invention relates to a mooring tensioning arrangement for a floating structure or a vessel (11), comprising -a mooring line (3, 5, 7) having a first mooring part (3) and a second mooring part (5, 7), divided by a midwater coupling (4, 40, 400, 111), said at least a portion of the mooring line (3, 5, 7) is made of synthetic material, -said mooring line (3, 5, 7) is extending between an anchor (2) arranged on the seabed and a pulling unit (9, 10, 42) arranged separate from the floating structure or vessel (11), said mooring line (3, 5, 7) is extending at least via a fairlead pulley or a chain wheel (8, 80) arranged on the floating structure (11) between the anchor and the pulling unit (9, 10, 42) when the mooring line (3, 5, 7) being pre-tensioned, -a chain stopper (6, 60) being arranged in connection with the mooring line (3, 5, 7) between the anchor (2) and the floating vessel or structure (11) for tensioning the part of the mooring line (3, 5, 7) situated between the floating structure (11) and the anchor (2) at a pretension level. The mooring tensioning arrangement further comprising a second tensioning line (100) configured to be attached in one end to the midwater coupling (4, 40, 400) and in the other end coupled to the pulling unit (9,10, 42) when said mooring line (3, 5, 7) being re-tensioned, said midwater coupling (4, 40, 400) and the pulling unit (9, 10, 42) being arranged relative each other such that the tensioning line (100) is configured to impose a lateral force on the part of the mooring line (3, 5, 7) arranged between the anchor (2) and the floating structure (11) for removing stretch in the mooring line (3, 5, 7). The invention also relates to a method tor tensioning the mooring tensioning arrangement.

The invention discloses a load sensor element used in a humid water environment, comprising a substrate, a transition buffer layer arranged on the upper surface of the substrate, an insulating layer arranged on the upper surface of the transition buffer layer, and a transition buffer layer arranged on the upper surface of the insulating layer. The functional layer and the protective layer on the upper surface of the functional layer; the base is made of 316L stainless steel, the transition buffer layer is CrNi film, and the insulating layer is TiO 2 film, the functional layer is FeCrMn alloy film, and the protective layer is Al 2 O 3 membrane. In the present invention, in the humid water environment, the load sensor element can be firmly fixed on the sample, and the connection between them is inorganic, thus eliminating zero point drift and creep, realizing temperature self-compensation, and improving the load sensor element. characteristics of the sensitivity and accuracy of the measurement results.