52results about How to "Reduce protection requirements" patented technology

The present invention relates to water cooling jacket for welding and corresponding welding method by means of using the water cooling jacket. The water cooling jacket has upper connecting plate with one side plane connected hermetically with the upper end of the C-shaped sleeve, and lower connecting plate with one side plane connected hermetically with its lower end. The welding method includes screwing the water cooling jacket tightly to the titanium alloy tube. The water cooling jacket of the present invention has simple structure and high cooling effect, and the welding and cooling method is simple, high in weld seam cooling speed, high welding quality, high welding efficiency, less argon consumption and low welding cost.

The invention discloses a six-degree-of-freedom Delta robot transmission mechanism, relates to a robot transmission mechanism, and satisfies the demands on the Delta robot performance in the process of rapid industrial development in our country. A main driving motor and an auxiliary driving motor are fixed on a machine body platform; a hollow main movement arm is connected with a main driving passive synchronous belt wheel; the main driving motor is in transmission connection with a main driving synchronous belt transmission mechanism; an auxiliary driving connecting shaft is connected with the hollow main movement arm and a bevel gear pair transmission mechanism through two universal joints; a parallelogram link mechanism is in ball hinging with the hollow main movement arm and a terminal working platform; an auxiliary driving synchronous belt wheel fixedly coats an output shaft of the auxiliary driving motor, and is connected with an auxiliary rotating passive synchronous belt wheel through an auxiliary driving synchronous belt; a wheel shaft of the auxiliary driving synchronous belt wheel is staggered from a wheel shaft of the auxiliary rotating passive synchronous belt wheel by 90 degrees; and an upper universal joint is rotationally connected with the wheel shaft of the auxiliary rotating passive synchronous belt wheel. The six-degree-of-freedom Delta robot transmission mechanism is applied to a Delta robot.

The invention discloses a method for recognizing touch points by using a surface acoustic wave touch screen. The method comprises the following steps of: based on a back wave positioning principle, reflecting a surface acoustic wave transmitted by a transducer when the surface acoustic wave meets a reflector (or a touch body), and calculating to obtain a distance between the touch body and the transducer by measuring time elapsed after the surface acoustic wave is transmitted by the transducer, reflected by the touch body and then is reflected back to the same transducer, according to a propagation velocity of the acoustic wave, thereby locating the touch body. According to the requirements of a touch system, different numbers of transducers can be configured so that one-dimensional and two-dimensional coordinate positioning of a single or/and multiple touch bodies is realized.

The invention discloses a real time detection device which belongs to the technical field of gas-solid phase flow detection and relates to the coal powder concentration and phase distribution in a pneumatic transmission pipeline. A sensor composite pipe section of the detection device is connected with a technical pipeline to be detected by a flange and a gasket seal. A spotted gamma source of the sensor is arranged on an axial line of the sensor composite pipe section. The gamma ray emergence angle of a gamma source collimator is 360 degrees plane emergence angle, and the emergence plane is vertical with the axial line of the sensor composite pipe section. A gamma ray detector consists of n independent ionization chambers of respectively-matched electrometers which form an annular ionization chamber array coaxial with a sensing and measuring pipe section. The detection device ensures that the influence of gas-solid phase flow pattern and phase distribution on the measurement of volume concentration can be reduced to the extent that can be neglected; radioactivity activity of required gamma ray source is reduced by times under the precondition of the same measurement precision; the field space occupied by a measuring device is reduced obviously; the cost is reduced obviously; the radiation protection range is reduced obviously; and gamma ray protection requirement and difficulty are reduced greatly.

The invention discloses a laser damage testing device for an optical thin film. The laser damage testing device comprises an optical power energy measurement instrument, wherein an aperture, a first lens, an optical attenuator, a sampling beam splitter and a focusing lens are arranged between a laser device and a coated lens to be tested in sequence; the aperture is arranged on the front focal plane of the first lens, and the coated lens to be tested is arranged on the rear focal plane of the focusing lens; and the incident transmission light of the sampling beam splitter enters the focusing lens, and the reflection light enters the optical power energy measurement instrument. According to the laser damage testing device, the infinite microscopic imaging mode is adopted, the uniform radiation on an image plane is obtained, the wide-range adjustable optical attenuation is realized, the needed spot size can be easily obtained, and the test requirement of high-power excimer laser system on film damage is met.

The disclosed wireless split meter comprises: a micro-controller, a meter module, an AC-DC power, a RF transmitting-receiving module, a cell, a hardware clock, a SAM module, and an indicator lamp; wherein, the former four items are necessary; or, forming a user interface device by a micro-controller, a LCD module, an AC-DC power,, a cell, a RF transmitting-receiving module, an IC interface, the press-key, and buzzer for common interface device with the former five items necessary. Wherein, it is fit to use a short-distance dual wireless communication between the calculation control device and user interface.

The invention discloses a method and a system for detecting the defect of a material based on an electron pair effect. The method comprises the following steps of: providing low-energy X-rays which can be subjected to the electron pair effect with the detected material; irradiating the detected material by using the low-energy X-rays to produce positive electrons in the detected material through the electron pair effect; measuring a gamma photon spectrum released due to annihilation of the positron electrons by using a gamma ray detector; and analyzing the gamma photon spectrum to judge whether the defect exists in the detected material or not. In the method, the internal defect of the detected material is detected by the positive electrons produced because the low-energy X-rays are subjected to the electron pair effect in the detected material, and the positive electrons are uniformly produced in the material, so microstructure information in the material can be uniformly brought out by 511keV gamma rays released after the annihilation of the positron electrons; in addition, the purchasing cost and using cost of the low-energy X-rays are lower, and the method and the system have a few protection requirements and are convenient to use on site.

The invention relates to a displaying adjusting method used for adjusting a thrust line of an unmanned aerial vehicle booster rocket and adjusting equipment used by the adjusting method. An thrust line displaying adjusting device of the unmanned aerial vehicle booster rocket comprises a frame; a front supporting column is arranged at the front end of the frame; rear supporting columns are arrangedat the rear end of the frame; the number of the rear supporting columns is one pair; the rear supporting columns are correspondingly positioned on the two sides of the frame; a matrix adjusting gridis also arranged in the position, positioned behind the rear supporting columns, at the tail end of the frame; the matrix adjusting grid is horizontal relative to the ground; multiple grids in the form of a rectangular array or a honeycomb array are arranged on the matrix adjusting grid to display different coordinate parameters; a rocket simulator is matched with the matrix adjusting grid; dimensions of the rocket simulator and the real booster rocket are as same as each other; a laser transmitter is arranged at the tail end of the rocket simulator; an optical beam direction of the laser transmitter is coincided with a thrust direction of the booster rocket; and the rocket simulator is inserted in a thrust seat arranged on an unmanned aerial vehicle belly.

The invention provides a new energy mining automobile electrical system. An engine is connected with an electric generator and then connected to an electric generator controller. The system further comprises an automobile wheel steering system and an automobile jacking system. The electric generator controller and a hydraulic motor controller are in control connection with a four-in-one integratedcontroller. An automobile traveling system is further connected to the four-in-one integrated controller and finally connected to a battery module. The battery module provides power for a whole automobile through the four-in-one integrated controller. When the state of charge SOC of a battery is lower than 45%, the engine drives the electric generator to generate current, the current is directlyinverted and integrated through the four-in-one integrated controller, meanwhile, the current is supplied to a main drive controller, the battery is assisted in conducting drive control on a main drive motor, and finally the whole automobile is driven. When the percent of the state of charge SOC of the power battery is larger than a set value, the engine stops working. When the automobile travelsdownhill again, the engine stops working, a new round of electric quantity recovery work starts, the recovery work is conducted in circles, so that a fuel and energy saving purpose is achieved, and the fuel consumption is saved by 50% to 70% compared with that of a traditional mining automobile.

The invention discloses a sealing structure for mounting a sensor by penetrating through two layers of pressure boundaries, a penetrating steel pipe penetrates through an outer-layer pressure boundary, and one end of the penetrating steel pipe is hermetically connected to the outer wall of an inner-layer pressure boundary through an inner-layer sealing device; the penetrating steel pipe penetratesthrough the outer-layer pressure boundary and is hermetically connected to the outer-layer pressure boundary through an outer-layer sealing device; the sensor probe and the sensor cable are both arranged in the penetrating steel pipe, and the sensor probe is connected to the sensor cable. The sensor probe penetrates through the inner-layer pressure boundary and is connected to the inner-layer pressure boundary in a sealed mode. The invention further discloses a sealing method for installing the sensor by penetrating through the two layers of pressure boundaries. According to the sealing structure and method for installing the sensor by penetrating through the two layers of pressure boundaries, the problem that the sensor is installed by penetrating through the two layers of pressure boundaries is simplified into the problem that only the inner-layer pressure boundary needs to be penetrated for installation, and the problem that a sensor signal cable also needs to be penetrated and sealed is solved.

A mixed working medium for the high-temp compression-type heat pump features no damage to ozone contains 1,1,1,2-tetrafluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, and 1,1,1,3,3-pentafluoropropane. It is possible to add butane to it. Its advantages are no poison, incombustible, and high thermodynamic performance.

The invention discloses three kinds of welded meshes of deformed rebars and a preparation method, belongs to the technical field of building engineering, and relates to rebar processing technology andequipment, in particular to welded meshes of deformed rebars and the preparation method. By providing the technical scheme for processing and producing the welded meshes of the deformed rebars, not only can the welded meshes of the deformed rebars at the bottom of a concrete slab be processed and produced, but also the welded meshes of the deformed rebars at the top of the corner of the concreteslab and the welded meshes of the deformed rebars at the top of the side of the concrete slab can be processed and produced. Since end rebars are bent up, the welded meshes of the deformed rebars areanchored into the top of a support from the top of the support, the welded meshes of the deformed rebars can be placed after other rebars at the support are bound. The preparation method of the weldedmeshes of the deformed rebars can realize the factory, large-scale and mechanized production of the welded meshes of the deformed rebars, has high production efficiency, good product quality, and lowprocessing cost, decreases the raw material consumption, greatly reduces the labor demand for binding the rebars, meets requirements of environmental protection and adapts to the development trend ofindustrialization of construction industry.

The invention discloses a polymer foaming agent for thermosetting foam. The polymer foaming agent is prepared from HFO-1336mzz (cis), HCFO-1233zd (trans), HFE-254pc and cyclopentane. The invention also discloses a preparation method of the thermosetting foam. The method comprises the steps as follows: the foaming agent is prepared from HFO-1336mzz (cis), HCFO-1233zd (trans), HFE-254pc and cyclopentane; sucrose polyether, glycerin polyether and sorbitol polyether are uniformly mixed for preparation of base polyether; a white material is prepared from base polyether, organic silicone oil, an amine catalyst PC-5, water and the foaming agent; a mold is cleared and the temperature of the mold is controlled; the mold is filled with the white material, overfilling foam is foamed, and the thermosetting foam is prepared after demolding. The composite foaming medium has the maximum ODP (ozone depletion potential) of 0.00024, belongs to olefin, has short atmosphere life, cannot effectively damagethe ozone layer and has the maximum GWP (global warming potential) lower than 90, which is lower than 100 required by Japan and far lower than 150 required by Europe and America. The polymer foamingagent completely meets environmental protection requirements for protection of the ozone layer and reduction of the greenhouse effect.

The present invention relates to a quinic acid lactone derivative preparation method, which comprises: in an organic solvent, carrying out a reaction with a compound 1 to obtain a compound 2. According to the method of the present invention, the solubility of the reactant in the solvent is increased so as to substantially improve the yield of the product and provide convenience and economy. The structures of the compounds 1 and 2 are defined in the specification.