45results about How to "No problem" patented technology

The invention relates to a grip for a handgun, in particular a pistol, having a grip module (1) made of plastic and a metal carrier element (2) that is insertable into said grip module (1). In order to enable a simple and cost-effective adaptation to the widest variety of demands of the marksman, a magazine shaft (4), projecting downward from the grip module (1) and onto which is slipped a grip shell module (3), is formed as a part of the carrier element (2).

The extraction rectification separation method for normal hexane and methyl cyclopentane comprises: adding the industrial hexane and dimethyl phthalate into the tower with given ratio; after separation, there is high-purity normal hexane on tower top, solution and methyl cyclopentane on tower kettle; putting the material in kettle to solution for distillation with methyl cyclopentane on tower top for further refine; recycling the solution. Wherein, the ratio is 1:3~5. This invention has recycle ratio more than 90% with purity more than 98%, and has no pollution.

The composite mixed mode and flow mode double-channel magnetic rheologic damper includes work cylinder, piston type magnetic field generator, compensator and sealing unit. The piston type magnetic field generator has two flow channels, including the outer channel without magnetic field and operating in mixed mode and the inner channel inside magnetic field and operating in flow mode. The damper may operate in no outer exciting current state with relatively small damping and in large outer exciting current state with relatively great damping. This kind of double-channel structure makes the magnetic rheologic damper possess greatly lowered damping under the condition of no external magnetic field, has expanded dynamic regulation range and even suitable for the semi-active control of vehicle suspension.

The invention discloses a broadband high-voltage intelligent resistance voltage-division voltage sensor, which consists of the following components: a resistance type voltage divider (1) used to pick voltage signal from a measured voltage circuit, a high-voltage side signal processing device (2) used to convert the analog voltage signal output from the resistance type voltage divider (1) into digital signal and carry out operation processing, a set of communication optical fibers (5) connecting the high-voltage side signal processing device (2) and a low-voltage side digital display terminal (6), a high-voltage side electric source (3) providing working electric source for the high-voltage side signal processing device (2) and a high-voltage isolating transformer (4) connecting the high-voltage side electric source (3) and a low-voltage side power supply electric network. The broadband high-voltage intelligent resistance voltage-division voltage sensor has wide frequency response scope, AC/DC commonality, wide effective testing scope, no magnetic saturation problem, high measuring precision, high voltage resistance, high linearity, low temperature drift, easy calibration and strong anti-interference capability, and is suitable to be used in places such as an electric motor manufacturing enterprise and an electric motor research and detection center, etc.

The invention discloses a method and a device for predicting a spectrum occupancy state based on a neural network. The method for predicting the spectrum occupancy state based on the neural network comprises the steps of S1: constructing the neural network and using a pruning algorithm to determine initial parameters of all layers and all neurons of the neural network; S2: inputting all elements in a set (bi, bi-1,..., bi-m) into the neural network, comparing an output result of the neural network with a representation variable hi+1 which represents the occupancy state of the preset frequency band of an (i+1) timing sequence, and correcting initial parameters to obtain predictive parameters according to the comparison result, wherein bi is the signal intensity of the preset frequency band of an i timing sequence, i is a positive integer, and m is a positive integer smaller than i; and S3: inputting all elements in a set (bi+1, bi,..., bi-m+1) into the neural network simultaneously, outputting a predictive representation variable Hi+2 which represents the occupancy state of the preset frequency band of an (i+2) timing sequence by the neural network, and judging the occupancy state of the preset frequency band of the (i+2) timing sequence according to the predictive representation variable Hi+2. The method has the advantages of being low in computation complexity and easy to implement.

The invention discloses a kettle cover with a pressure relief device. The kettle cover is arranged on a bottleneck of a kettle and comprises a kettle suction nozzle, a bottleneck cover, a fastener, anouter cover and an opening element, wherein the kettle suction nozzle is provided with a sucking part and a valve part, the valve part is provided with a pressure relief seam, the kettle suction nozzle is arranged on the bottleneck cover, and the sucking part and the valve part are exposed to the outer side; the bottleneck cover is locked on the bottleneck, the fastener is pivoted on the bottleneck cover, a traction element in contact with the valve part is integrally formed, one end of the outer cover is pivoted on the bottleneck cover, and the other end of the outer cover is fastened by thefastener and fixed on the other side of the bottleneck cover; the fastener inclines outwards under the linkage effect of the opening element and does not buckle the outer cover any longer, and meanwhile, the traction element drives the valve part to deform so as to open the pressure relief seam; and therefore, when a user presses the opening element to open the outer cover, the pressure relief seam can be simultaneously linked to be opened to relieve pressure, water in the kettle is prevented from being sprayed out of the sucking part due to the pressure, and dangers and environmental pollution can be avoided.

The invention provides a shaping die for manufacture of gas turbine seals and a manufacture process of the gas turbine seals and belongs to the field of machining. The shaping die comprises a left moving core, a right moving core, a fixed die, guide posts and a base. The base is fixed on a base of a hydraulic press. The fixed die is fixed on the base. Left and right profiles of the fixed die match with a toothed surface profile of a seal; the fixed die is provided with teeth matching with those of the seal. The left moving core and the right moving core are disposed on two sides of the fixed die and fixed on a horizontal cylinder of the hydraulic press. The right surface profile of the left moving core and the left surface profile of the right moving core are matched with the smooth surface profile of the seal. The shaping die for manufacture of the gas turbine seals and the manufacture process of the gas turbine seals have the advantages that the inside and outside of the seal manufactured with the shaping die and by the manufacture process are free of flaw, the various specified requirements can be met, the shaping die and the manufacture process are fully adaptable to ultrahigh temperature and high pressure environments, and the seal never fails when a gas turbine operates.

The invention discloses a magnetic field modulation motor magnetic circuit structure for a robot arm joint, and relates to the technical field of robots, more permanent magnets are adopted, more harmonic magnetic fields are generated through magnetic field modulation, although the harmonic magnetic fields cannot be seen, electromagnetic torque is actually generated to participate in the electromechanical energy conversion process, and the mechanical energy conversion efficiency is improved. Harmonic waves include third-order harmonic waves, fifth-order harmonic waves, seventh-order harmonic waves,... 2k + 1-order harmonic waves, generation of the harmonic waves actually enables the equivalent pole number of the motor to be increased, and therefore the rotating speed is reduced, electromagnetic speed reduction of a traditional servo motor can be achieved, the output rotating speed of a motor rotor shaft is reduced, torque is greatly improved, a speed reducer can be omitted, or the speed ratio of the speed reducer can be greatly reduced. Therefore, the technical threshold of mechanical manufacturing is reduced, low-speed direct drive and large-torque output of the motor are achieved, the transmission structure is greatly simplified, the weight of the transmission structure is reduced, and the dynamic response capacity and control precision of the system are improved.

The invention relates to a method for preparing p-bromophenylacetone by biomimetic catalytic oxidation of p-bromoethylbenzene, comprising the following steps of: taking p-bromoethylbenzene as raw material; selecting either of 1-30ppm mononuclear metal porphyrin and mu-oxo-dinuclear metal porphyrin or the both as a catalyst; introducing oxygen at the flow speed of 10 to 60mL/min under normal pressure without solvents; initiating reaction at 140 DEG C to 170 DEG C; and reacting for 6 to 16h at 80 DEG C to 120 DEG C to obtain the p-bromophenylacetone. The method uses the mode of high-temperaturequick initiation and low-temperature reaction, greatly shortens the initiation time of the reaction and the reaction time, improves the reaction efficiency, reduces the energy consumption and operation costs and improves the reaction safety.

The invention discloses a high-efficiency heat radiating fin. The high-efficiency heat radiating fin comprises a fin body, wherein the fin body is made of aluminum alloy and is formed by stamping; heat radiating fins are respectively arranged on two sides of the fin body; the space of every two heat radiating fins is equal; the top of each heat radiating fin is of a circular arc shape; a mounting hole is formed on the surface of each fin body; the mounting hole is formed by using a drilling milling machine; and the sizes of the mounting holes are identical. The high-efficiency heat radiating fin disclosed by the invention can be applied to a daily household appliance and can conveniently help the appliance dissipate heat; in addition, the high-efficiency heat radiating fin is made of aluminum alloy, and thus the production cost is saved, the production quality is improved and the simpleness and convenience in the actual mounting process are realized; the heat dissipating function is favorable, so that the problem caused by improper dissipation of the inside of the appliances can be solved; favorable practical performance and high flexibility are realized; and the high-efficiency heat radiating fin is a novel design scheme and facilitates the popularization and the use.

The invention discloses a polyurethane composition for a high-surface-quality self-demolding automobile exterior trimming part material and application thereof. The polyurethane composition comprises, in percentage by weight, a component A which comprises 50-60% of polyether polyol 1, 10-20% of polyether polyol 2, 5-10% of polyether polyol 3, 1-5% of a fluorosilicone modified amino compound, 5-10% of a chain extender, 0.2-2% of a foam stabilizer, 0.5-2% of a catalyst, 1-5% of a flame retardant and 0.2-1% of water. 0.5-3% of other additives are selectively added; the polyether polyol 1 takes cane sugar and glycerol as a mixed initiator, the hydroxyl value is 400-500mg KOH/g, and the polyether polyol 1 has six functional groups; the polyether polyol 2 takes glycerol as an initiator, the hydroxyl value is 400-500mg KOH/g, and the polyether polyol 2 has three functional groups; the polyether polyol 3 takes glycerol as an initiator, is grafted by epoxypropane and terminated by ethylene oxide, has a hydroxyl value of 33-37 mg KOH/g, and has three functional groups; and a component B is PAPI.

The invention discloses an air purification module. The air purification module comprises a coarse filtration screen, a fine filtration screen, filter cotton and a modified nano-titanium dioxide foam metal filtration screen. The coarse filtration screen is used as a surface and the modified nano-titanium dioxide foam metal filtration screen is used as an inner layer. The fine filtration screen and the filter cotton are orderly arranged between the coarse filtration screen and the modified nano-titanium dioxide foam metal filtration screen from outside to inside. Compared with the prior art, the air purification module can realize effective sterilization, disinfection and organic pollutant degradation without energy consumption, has a low use cost, utilizes the purification screens recyclable after cleaning, prevents adsorption saturation, is convenient for maintenance, has high efficiency and has no toxic or side effect.

The invention discloses an inflatable type on-load tap changer for a transformer. The on-load tap changer includes an insulating cylinder, fixed contacts, a main shaft, a drive mechanism, lubricants,an upper cover, switching contacts, transition resistors, transition contacts, a lower cover, an inflation space, and a drive mechanism shell; The inflatable type on-load tap changer fully utilizes non-flammability, good insulation performance and arc extinguishing performance of a sulfur hexafluoride (SF6) gas, and the on-load tap changer produced by the invention has the following characteristics of being not easy to catch fire and high in safety, being long in service life and repaor cycle, being small in land occupation area and convenient to install and operate, and being excellent in performance and reliable in operation.

The invention discloses a correction method and a correction circuit of a wireless transceiver. The wireless transceiver comprises a transmission path and a receiving path. The transmission path comprises a mixer. The correction method includes: (A) adjusting a first parameter of a first resonant circuit of the mixer; (B) receiving a first input signal through a coupling path and the receiving path; (C) measuring a first power of the first input signal; (D) repeating the steps (A) to (C) to obtain a plurality of first powers; and (E) finding out a first target parameter corresponding to the maximum one of the first powers.

The invention discloses an unbalanced current measuring device. The unbalanced current measuring device comprises a primary optical sensing unit, a fiber optic insulator, a communication optical cableand a secondary data acquisition unit, wherein the neck of the primary optical sensing unit is fixed with a capacitor tower through a flange II; one end of the fiber optic insulator is fixed with thebottom of the primary optical sensing unit through a flange I and the flange II, and the other end of the fiber optic insulator is connected with the secondary data acquisition unit through the communication optical cable. The provided unbalanced current measuring device is simple and reliable in structure, convenient to construct and mount, better in stability, moderate in cost and suitable forlarge-scale popularization, and has great significance in development of ultra-high-voltage direct-current projects.