37results about How to "Eliminate creep" patented technology

A method for sharp, crisp hemming inner and outer aluminum sheet metal panels in which a flange is formed along an outer edge so that the flange extends from a bend line and lies in a plane generally perpendicular to the plane of the outer panel. This bend line, furthermore, has an outer radius in the range of (1.0 mm+t)>R>(0.2 mm+t) where t=the thickness of the outer panel. The inner panel is then positioned on the outer panel so that an outer edge of the inner panel is adjacent the bend line. The flange is then bent so that the flange overlies the outer edge of the inner panel while simultaneously compressing the flange in the direction towards the bend line. Thereafter, the flange is compressed against the outer peripheral portion of the inner panel thus completing the hem. The present invention thus achieves a sharp radius bend on the outer edge of the panel with a layer radius bend on the inner panel as well as a class "A" surface on the outer panel adjacent the hem which is free of recoil or other distortion.

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 relates to a novel optical fiber temperature and pressure sensor, which comprises an elastic diaphragm, an optical fiber Bragg grating and a demodulator connected with the optical fiber Bragg grating, wherein a short connecting pipe is sleeved on a raised column of the elastic diaphragm; the other end of the short connecting pipe is fixedly provided with a hollow rod; the hollow rodand the end face of a first optical fiber in the center thereof form a first reflecting surface through polishing; a reflecting film is plated on the first reflecting surface; the other end of an outer protection tube is inserted into a long connecting pipe with a second ceramic ferrule component; the bending part of a second optical fiber is provided with the optical fiber Bragg grating; a second ceramic rod and the end face of the second optical fiber in the center thereof form a second reflecting surface through polishing; and the first reflecting surface of the hollow rod and the second reflecting surface of the second ceramic ferrule component are centered and are provided with a space therebetween to form a Fabry-Perot cavity. The optical fiber temperature and pressure sensor is used for manufacturing optical fiber sensors.

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 discloses a structure for preventing a rear axle stabilizer rod from loosening and having abnormal sound. The structure comprises a rear axle stabilizer rod, wherein stabilizer rod sleeve barrels are respectively and fixedly connected to two ends of the rear axle stabilizer rod; each stabilizer rod sleeve barrel is provided with a barrel top surface and a barrel bottom surface; eachbarrel top surface comprises a first annular plane and a second annular plane; the height between each second annular plane and the corresponding barrel bottom surface is greater than that between thecorresponding first annular plane and the corresponding barrel bottom surface; loosening preventing teeth are arranged on each first annular plane, and each loosening preventing tooth is provided with a tooth top and a tooth root; and the height between each tooth top and the corresponding tooth root is greater than that between each first annular plane and the corresponding second annular plane.The structure disclosed by the invention is simple in structure, low in cost, and high in reliability; the problems that the torque of a relevant part is loosened, and a chassis at the relevant parthas abnormal sound can be solved; and the driving quality and the appearance quality can be improved.

A micro-electromechanical actuator employs metal for the hot arm and silicon for at least the flexible portion of the cold arm. The cold arm made of silicon is coupled to a metal wire that moves with it and is used to carry the signal to be switched when at least two of such actuators are formed into a switch. Arrays of such switches on a first chip may be cooperatively arranged with a second chip that is flip-chip bonded to the first chip, the second chip having thereon wires routing the electrical control currents to the various hot arms for heating them as well as the signals to be switched by the various switches.

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.