30results about How to "Convenient and Accurate Monitoring" patented technology

Lubricant escape passages are formed in the threads used to connect one tubular body to another. The passages conduct trapped thread lubricant out of the threaded area to prevent the creation of high lubricant pressure that may damage or cause improper make up of the threaded connection. The passages may be grooves in the crests of the thread teeth and / or may be corner bevels on the thread teeth. In a conductor pipe or other pipe assembly using axially spaced internal and external seals at each axial end of the threaded area, the escape passages form a helical flow path through the engaged thread area. The external seal prevents the entry of corrosive fluids into the threaded area and the internal seal prevents leakage through the threaded area from within the conductor pipe. When the lubricant pressure increases excessively during assembly or impact loading of the connection, the lubricant escapes past the seals to prevent connection damage. When used with a wedge or other metal-to-metal thread engaging designs, the escape passages may be interrupted at some point intermediate their helical path to provide a pressure seal at the point of interruption. Relieving trapped lubricant from a wedge thread connection permits consistent final makeup positions that ensure optimal pressure sealing.

The present invention relates to a method of measuring optical fiber link chromatic dispersion by fractional Fourier transformation (FRFT), belonging to the technical field of optical communication. The method of the present invention performs coherent demodulation for an optical pulse signal output from the optical fiber link to obtain a complex field of the optical pulse signal, then performs FRFT on the complex field; according to the energy focusing effect of the chirp signal in the fractional spectrum, calculates an optimal fractional order of the FRFT, and then calculates chromatic dispersion of the optical fiber link according to the optimal fractional order. The method can be applied to an optical fiber communication system consisting of different types of optical fibers, to perform monitoring of optical fiber link chromatic dispersion.

The embodiment of the present invention discloses a bushing strain monitoring method and system based on axially arranging optical fibers, which includes: S1, along the axial direction of the bushing to be measured, laying distributed optical fiber sensors on the surface of the bushing to obtain all The optical fiber strain data collected when the casing is loaded; S2, converting the optical fiber strain data obtained by the distributed optical fiber sensor into strain; S3, based on the preset casing strain monitoring model, calculating the corresponding load data. The present invention detects real-time optical fiber strain through a distributed optical fiber sensor; at the same time, records the applied axial tensile load value and radial bending load value, and obtains the load data corresponding to the output value of the distributed optical fiber sensor based on the casing strain monitoring model , the casing strain monitoring model can express the corresponding relationship between the sensor output value and the casing load (axial and radial). The invention can conveniently and accurately monitor the deformation and load of the casing.

The invention discloses an indirect measurement method, an elastic membrane using the method and an application of the elastic membrane. The elastic membrane is provided with marks such as points, circles or grids at equal intervals; the method comprises the following steps: covering a measured object with the elastic membrane, and indirectly measuring the measured object by measuring the elasticity change ratio of the marks on the elastic membrane. By adopting the method, the surface size of the measured object can be simply, conveniently and effectively measured; by using the elastic membrane as a straitjacket, human body types can be measured or detected, for example, the weight-lose effects of an abase patient in different periods in the weight-lose process can be detected, and a bodybuilder can quantize exercise modes and the like by acquiring size parameters of different parts of the body.

The invention relates to a screw coating device. The screw coating device comprises a rack, and further comprises a drive shaft, wherein the two ends of the rack are provided with bearing blocks; a slide slot is formed in the rack above the bearing blocks; a supporting base is in sliding connection in the slide slot; the supporting base is rotatably connected with a rotary shaft; the rotary shaftis coaxially and fixedly connected with a rotary disc; a liquid storage bin is arranged in the center of the rotary disc; a plurality of spraying heads which can be engaged with a screw are uniformlydistributed on the rotary disc in a peripheral direction; liquid outlet tubes are arranged between the spraying heads and the liquid storage bin in a communication mode; a circular belt is connected between the drive shaft and the screw; the drive shaft is fixedly connected with a first connecting rod; the other end of the first connecting rod is rotatably connected with a second connecting rod; the other end of the second connecting rod is hinged to the supporting base; a material storage box is arranged below the bearing block; a liquid outlet and a reflux hole are formed in the material storage box; a liquid inlet tube is connected between the liquid outlet and the liquid inlet; and a pressure pump is arranged on the liquid inlet tube. The device is high in working efficiency and is good in coating quality consistency.

The embodiment of the present invention discloses a casing strain monitoring method and device based on helically arranging optical fibers. The casing strain monitoring method includes: S1. Distributed optical fiber sensors are arranged in the form of wiring to obtain the optical fiber data collected when the casing is loaded; S2, convert the optical fiber data obtained by the distributed optical fiber sensors into corresponding strains through the strain interrogator; S3, based on The preset casing strain monitoring model calculates the load data corresponding to the strain, and the load data includes but not limited to tensile load, internal pressure load, and concentrated load. The invention can conveniently and accurately monitor the deformation and load of the casing.

The invention discloses a converter valve hall monitoring sensor arrangement method, which relates to the technical field of direct current power transmission. The converter valve hall monitoring sensor arrangement method comprises the following steps: constructing a valve hall model according to the layout of equipment in the valve hall; determining affecting equipment affecting the environment in the valve hall and parameters thereof, and performing configuration of different combination forms on the affecting equipment; preliminarily selecting arrangement points of fixed monitoring sensorsbased on the valve hall model and detecting the environmental parameters of the environment in the valve hall under different combination forms; using a mobile monitoring sensor to determine the maximum measurement ranges of the fixed monitoring sensors, and drawing a map of the maximum measurement ranges of the sensors at the arrangement points in different combination forms; and drawing a minimum cross map at the arrangement points according to the map of the maximum measurement ranges of the sensors, and adjusting and finally determining the arrangement points of the monitoring sensors andthe spacing distance.

The invention relates to the field of oil depot simulation experiments, in particular to a simulation device for underground water-sealed oil depot experiments, comprising an oil storage chamber fixed on the inner bottom surface of an outer water tank, and an elevating mechanism for raising or lowering by using buoyancy is arranged on the inner bottom surface of the oil storage chamber. A hanging plate is fixed on the lifting mechanism, and the lower surface of the hanging plate is provided with a wave-proof mechanism that hinders the generation of ripples, and the lifting mechanism is provided with an adjustment mechanism for adjusting the contact between the wave-proof mechanism and the oil liquid surface. This kind of simulation device for underground water-sealed oil depot experiments makes the whole experimental simulation device suitable for underground water-seal storage experiments of different oil products, can accurately measure experimental parameters, obtain accurate experimental data, and obtain parameters that are more in line with actual conditions The variable relationship among them is beneficial to the construction and precise monitoring of underground water-sealed oil depots.