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33results about How to "Solve unfavorable problems" patented technology

Self-excited atomic magnetic sensor for liquid crystal phase compensation and magnetic field measurement method

The invention discloses a self-excited atomic magnetic sensor for liquid crystal phase compensation and a magnetic field measurement method, which are used for a magnetometer. The self-excited atomicmagnetic sensor comprises a pumping light path perpendicular to the direction of the magnetic field, a probe light path along the direction of the magnetic field, and a circuit closed loop. The pumping light path sequentially comprises an atomic air chamber, a first polarizer, an acousto-optic modulator, and a laser. The probe light path sequentially comprises a photoelectric detector, an atomic air chamber in the pumping light path, a second wave plate1 / 4, a liquid crystal, a first wave plate1 / 4, a second polarizer, and a laser. The closed loop portion of the circuit comprises a photoelectricdetector, an amplifying comparator, a power driver, an acousto-optic modulator, and a counter. According to the liquid crystal phase compensation scheme, a phase shift caused by a circuit coil can beavoided, a phase shift of a larger range magnetic field can be achieved, and the problem that the circuit is unfavorable in the phase shift is solved by combining a light intensity modulation magnetometer and a self-excited magnetometer, the response speed is high, the liquid crystal phase compensation scheme is suitable for the various atomics, and the application value is high.
Owner:PEKING UNIV

Adjustable multimedia teaching assisting device

InactiveCN107701884ASolve the problem that it is not convenient to move and fixEasy to fixProjectorsStands/trestlesDrive motorProjection display
The invention discloses an adjustable multimedia teaching auxiliary device, which comprises a support frame, a storage battery is fixedly connected to the middle position of the inner bottom of the support frame, chute is opened on the bottom of the inner wall on both sides of the support frame, and the inner walls of the two chute A sliding block is movably connected, and a movable plate is fixedly connected between the opposite sides of the two sliding blocks. The invention provides an adjustable multimedia teaching auxiliary device. By setting an electric push rod and universal wheels, it has the advantages of being convenient to move and fix. By setting a buffer device, it has the advantage of shock absorption. By setting a driving motor, a screw rod, The adjustment block and the top plate have the advantage of adjusting the projection height of the multimedia setting, the advantages of adjusting the projection direction of the multimedia equipment by setting the rotating disk and the fixed shaft, and the adjustment of the projection angle of the multimedia equipment by setting the adjustment seat, the pin shaft and the adjustment bolt Advantages, it solves the problem that multimedia equipment is not easy to adjust in teaching.
Owner:赵顺豪

Braking system of electric locomotive based on high-power inverter

The invention relates to the technical field of the braking of electric locomotives, particularly to a braking system of an electric locomotive based on a high-power inverter. Through a vehicle control unit, an inversion feedback system of regenerated energy is united with an eddy braking system together. The inversion feedback system of regenerated energy is adopted, when the electric locomotive brakes, a regeneration braking system preferentially supplies energy needed by eddy braking, and returns surplus energy to an electric grid. The braking system solves the problems that when only the inversion feedback system of regenerated energy is adopted, the utilizing rate of the energy returned to a traction network is low, and the voltage of the electric grid is increased, so that the power supply equipment of power substations is influenced; when only the eddy braking system is adopted, because the kinetic energy of a moving object is converted into heat energy and dissipates during eddy braking, a braking device warms, and demagnetization occurs on a permanent magnet, so that the braking fails. Through the adoption of the braking system disclosed by the invention, loading of the electric grid and loading of elements can be relieved, and besides, the utilizing rate of energy is increased, and the safety performance of the braking of the electric locomotive can be improved.
Owner:NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Absorbing emulsion of volatile organic compounds (VOCs) and preparation method of absorbing emulsion

The invention discloses a formula of an absorbing emulsion of volatile organic compounds (VOCs). The absorbing emulsion is a W / O / W (Water / Oil / Water) multiple emulsion and comprises the main components: white oil, water, emulsifying agents (Tween-80 and Span-80) and inorganic salt (sodium silicate, sodium phosphate and sodium carbonate), wherein the volume ratio of the white oil to the water is 1: (3 / 7-7 / 3), the total mass of the emulsifying agents (Tween-80 and Span-80) is 1-10% (g / ml) of the total volume of mineral oil-water, and the total mass of the inorganic salt is higher than the total volume of the mineral oil-water by less than 1% (g / ml). According to the formula, the absorbing emulsion of the VOCs has the advantages of simple preparation method, high absorption rate of the VOCs, good dispersibility, regeneration, low regeneration cost and the like. The invention also discloses a preparation method of the absorbing emulsion.
Owner:NANJING UNIV

Sediment oxygen demand determination device based on electromagnetic dynamic and using method

InactiveCN103207266ASolve unfavorable problemsEnables Oxygen Consumption Rate DeterminationEarth material testingHand heldElectric machinery
The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.
Owner:EAST CHINA NORMAL UNIV

Hollow slab bridge structure with end floor beams and construction method thereof

The invention relates to a hollow slab bridge structure with end floor beams and a construction method thereof, and belongs to the technical field of civil construction. The hollow slab bridge structure comprises a precast hollow slab, the end floor beams and a cast-in-situ structure layer. The precast hollow slab is supported by temporary supports which are arranged on two adjacent pier caps side by side in the horizontal direction of a bridge, the end floor beams supported by permanent supports are cast on the peripheral portions of the two ends of the precast hollow slab, and the cast-in-situ structure layer formed with the end floor beams together is cast on the end floor beams and the precast hollow slab. The hollow slab bridge structure is simple, the construction method is simple, the horizontal load transmission capacity of the hollow slab bridge structure with the end floor beams is improved, and the defect that a bridge structure is at an unfavorable stress state easily when supports of an existing domestic assembled type hollow slab bridge disengage is overcome.
Owner:FUZHOU UNIV

Electrode assembly

The invention discloses an electrode assembly structure. The structure comprises a tungsten mandril, a metal ceramic rod and a lead structure which are connected in turn, wherein one end of the tungsten mandril is a discharge end, the other end of the tungsten mandril is connected with one end of the metal ceramic rod, and the other end of the metal ceramic rod is connected with the lead or the metal ceramic rod directly used as the structure of a leading-out wire; and the outer diameter of the tungsten mandril is equivalent to that of the metal ceramic rod. The electrode assembly structure can effectively prevent the excessive conduction of heat to a tail end of the electrode assembly and ensure the excellent performance of a finished lamp in all aspects.
Owner:CHAOZHOU AUBADE LIGHTING

Rear projection display

The present invention provides an illuminating device and a projection type video display device that do not require a dichroic prism, and that generate systems for each color of video light independently, thereby enabling optimization of each generating system and improvement in assembly. Each video light projection unit is composed of an LED array, a columnar integrator, a liquid crystal display panel and a projection lens. The projection optical axes of the projection lenses in each video light unit are parallel to each other. The red video light projection unit has an LED array that emits light in the red wavelength band, the green video light projection unit has an LED array that emits light in the green wavelength band, and the blue video light projection unit has an LED array that emits light in the blue wavelength band. The video lights of various colors obtained through the liquid crystal display panel are magnified and projected by the projection lens, and projected on the screen, so that the video lights of various colors overlap on the screen to display full-color video.
Owner:SANYO ELECTRIC CO LTD

Electrified railway traction power supply system and method based on multi-source access structure

The invention discloses an electrified railway traction power supply system and method based on a multi-source access structure. The system comprises a power supply unit, an energy storage unit and atraction network unit. The power supply unit at least comprises two of a distributed wind turbine generator, a distributed photovoltaic group, a fuel battery pack, a diesel engine / small hydropower station group, a power distribution network and a high-voltage power grid. The energy storage unit comprises energy storage equipment, an energy storage converter and a split traction transformer. According to the electrified railway traction power supply system and method, the excessive dependence on a high-voltage power grid is avoided. Natural endowment of wind, light, water and the like of an electrified railway construction site and other convenient power supplies can be realized. An energy supply system is flexibly formed, safe, reliable and continuous power supply of a traction power supply network under a weak net rack or even without a net rack is realized by utilizing the energy migration technical characteristics of 'full-time convergence and on-demand release' of the energy storage unit, and meanwhile, a plurality of adverse problems of an existing electrified railway traction power supply system are solved.
Owner:BEIJING NEGO AUTOMATION TECH

Composite foundation composed of rubble/ sand inverted filter layer and porous concrete piles and treatment method

InactiveCN103938609AContinuous and effective drainageReduce congestionSoil preservationPorosityCrushed stone
The invention discloses a composite foundation composed of a rubble / sand inverted filter layer and porous concrete piles and a treatment method. The exterior structure of the foundation is the rubber / sand inverted filter layer, and the interior of the foundation is porous concrete. The pile diameter is 0.3 m-0.8 m, and the thickness of the rubble / sand inverted filter layer outside the piles is 0.2 m-0.4 m. After underwater maintenance for 28 days, the compressive strength of the porous concrete is not lower than 5 MPa, the permeability coefficient is not lower than 5 mm / s, the pile spacing is 3-5 times of the pile diameter, and the porosity rate of the porous concrete is greater than 20 percent. The treatment method of the foundation comprises the steps that according to the requirements for foundation settlement and bearing capacity, the pile diameter, the pile spacing, the foundation reinforcement range, the reinforcement depth, the pile arrangement mode, the amount of packing in pile holes and the thickness of pile top granular materials or wet clay are determined, and piles are constructed. According to the composite foundation, the problem that the porous concretes are blocked by slurry is effectively weakened; the rubble / sand inverted filter layer plays a role in water permeability and inverted filtering, and therefore the piles can be drained continuously and effectively in the composite foundation.
Owner:SHANDONG UNIV

Side-groove sliding clamp type stone dry-hanging structure

The invention discloses a side-groove sliding clamp type stone dry-hanging structure which comprises stone, a keel, a sliding-clamp-type hanging member (2) and an integral-type hanging member (3). The keel is fixed on a wall surface, the sliding-clamp-type hanging member (2) is connected with the keel through a bolt (4), side grooves (6) are formed on the upper lateral side and the lower lateral side of the stone, the integral-type hanging member (3) comprises a plant stone member which is embedded into the side grooves (6), and the integral-type hanging member (3) is fixed on the sliding-clamp-type hanging member (2) through an adjusting screw (5). By the side-groove sliding clamp type stone dry-hanging structure, various unfavorable problems of conventional stone dry-hanging technology are effectively solved, and safety coefficients are increased; on-site welding is reduced, hidden trouble of ageing and shedding due to using of marble glue is avoided, on-site manual grooving is avoided, on-site dust pollution is reduced, mounting efficiency is improved, construction cost is lowered, construction efficiency is improved, and stone mounting period is shortened.
Owner:GOLD MANTIS CONSTR DECORATION

Portable waterborne emergency lifesaving device

The invention provides a portable waterborne emergency lifesaving device. A chamber in which a foamed material can be arranged is formed in the end of a closed box which can be connected with a strap; a capsule cavity in which a soft airbag can be arranged and is fixedly connected is formed in the other end of the closed box; a foamed liquid material channel for regulating the on-off by virtue of a key switch is formed between the chamber and the capsule cavity; a closeable foamed liquid material injection hole is formed in the outer end of the chamber; a sealing cover expanded to open is arranged at the outer end of the capsule cavity; a strap fastening ring through which the strap can be inserted is arranged on one side of the closed box which can be connected with the strap; and a pull ring capable of pulling the key switch is arranged on one side opposite to the key switch of the box. During use, a polyurethane foamed material is injected into the chamber, the device is fixed on a human body after the box is connected with the strap by virtue of the strap fastening ring, and during waterborne swimming or waterborne operation, the foamed liquid can enter the soft airbag so as to form a solid foamed material by virtue of the key switch during emergency, a water floating effect can be achieved, the device is small in size and convenient to carry, and the formed block is large in size and high in buoyancy.
Owner:万廉威

Integrated desktop neutron generator

ActiveCN111698822ASmall sizeBlocking Difficulty ReducedDirect voltage acceleratorsNuclear physicsCooling fluid
The invention belongs to the technical field of neutron generators, and particularly relates to a vertical neutron generator. The vertical neutron generator comprises a D+ ion source and a straight pipe type cooling liquid flow guide pipe which are arranged in a movable main cabinet; the cooling liquid flow guide pipe is perpendicular to the ground, a high-voltage input module is arranged at the top end of the cooling liquid flow guide pipe, a target electrode is arranged at the tail end of the cooling liquid flow guide pipe, and the D+ ion source is located below the target electrode. The vertical neutron generator also comprises a straight pipe type vacuum cavity, wherein one end of the vacuum cavity is connected with the tail end of the cooling liquid flow guide pipe in a sealed mode, the other end of the vacuum cavity is connected with the tail end of the D+ ion source in a sealed mode, and the target electrode is located in the vacuum cavity. The vertical neutron generator also comprises a molecular pump unit which is used for vacuumizing the vacuum cavity; the high-voltage input module provides high-voltage electricity for the target electrode, the cooling liquid flow guide pipe provides cooling for the target electrode, and the D+ ion source emits D+ ion beams to the target electrode, so neutrons are generated on the target electrode. Generation of neutrons of the neutron generator can be remotely controlled, the structure can be split, main consumables are maintainable target pieces and ion sources, and the service life is basically not limited.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY

Underground engineering reserved deformation joint connecting interface structure and manufacturing method thereof

The invention discloses an underground engineering reserved deformation joint connecting interface structure. The underground engineering reserved deformation joint connecting interface structure is characterized in that a groove (3) is formed in a boundary surface of new / old concretes (1 and 2), a left-side steel plate water-stop belt (4) is reserved in the old concrete (2) and positioned at the groove (3), the left-side steel plate water-stop belt (4) is welded with a right-side steel plate water-stop belt (5), the right-side steel plate water-stop belt (5) is positioned in the new concrete (1), a deformation joint (6) is formed in the cross section of the new concrete (1), a detachable water-stop belt (7) which is perpendicular to the deformation joint (6) is arranged in the deformation joint (6), and meanwhile, two ends of the detachable water-stop belt (7) are buried in the new concretes (1) on two sides. The underground engineering reserved deformation joint connecting interface structure has the advantages that adverse problems of a frequently used reserved interface mode are solved, a protection function can be fulfilled well in an early period, construction is facilitated in a later period, construction quality is ensured, and the waterproof performance is good.
Owner:TUS DESIGN GRP CO LTD

Fenton-like oxidation device for waste resin and oxidation method of device

The invention provides a Fenton-like oxidation method for waste resin. The method comprises the following steps: 1) mixing the radioactive waste resin having water generated in nuclear industry and acomposite catalyst, adding a certain amount of Na2SO4, and performing full stirring; and 2) controlling the reaction temperature and pH, introducing oxygen or performing aeration, adding H2O2 with a certain concentration by mass through valve control, and performing rapid degradation on the waste resin under the energization condition to make the organic components of the waste resin inorganic, wherein the catalyst is a mixture of Fe<2+> and Mn<2+> or Co<2+>. By using the oxidation method and device provided by the invention, the oxidative degradation efficiency of the waste resin can be improved in a shorter reaction time, the use amount of H2O2 during the treatment can be reduced, and the generation rate of an oxidant during the treatment can be improved; and the method has the advantages of a simple process, high efficiency and low production costs.
Owner:JIANGSU ZHONGHAI HUA HE ENVIRONMENTAL PROTECTION CO LTD

Self-shielding DD neutron generator

ActiveCN111712032ASmall sizeBlocking Difficulty ReducedDirect voltage acceleratorsNuclear engineeringNeutron
The invention belongs to the technical field of neutron generators, in particular to a self-shielding DD neutron generator. The self-shielding DD neutron generator comprises a sealed cubic shielding body formed by folding a first shielding body (1) and a second shielding body (2), a first cavity (3) is formed in the first shielding body (1), and a second cavity (82) is formed in the second shielding body (2). When the first shielding body (1) and the second shielding body (2) are folded, the first cavity (3) and the second cavity (82) jointly form an equipment cabin provided with a main body part of the neutron generator, the main body part of the neutron generator is used for generating neutrons through a DD reaction. According to the present invention, the generation of neutrons of the neutron generator can be remotely controlled, the structure can be split, the main consumables are maintainable target pieces and ion sources, and the service life is basically not limited; the occupied area is only 2 m < 2 >, the DD neutron generator can be used in a common room, and a neutron shielding hall does not need to be independently built.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY

Sediment oxygen demand rate determination device based on electromagnetic dynamic and using method

InactiveCN103207266BSolve unfavorable problemsEnables Oxygen Consumption Rate DeterminationEarth material testingMagnetic tension forceElectric machine
The invention relates to a sediment oxygen demand (SOD) determination device based on electromagnetic dynamic, and a using method. The SOD determination device comprises a testing room, a dynamic room, a magnetic rotor, a magnetic pole, a motor, a dissolved oxygen probe socket, support fixing interfaces and a storage battery, wherein the testing room is in a cylinder structure with the bottom end opened and the runway-shaped cross section; the dissolved oxygen probe socket is formed on one side of the top of the testing room; the support fixing interfaces are arranged at the two ends of the top of the testing room respectively; the dynamic room is a cylindrical barrel and reversely fixed at the top of the testing room; the motor connected with the magnetic pole is arranged in the dynamic room, and is externally connected with the storage battery by a connecting line; the magnetic rotor is placed in the testing room, and is in magnetic connection with the magnetic pole; a hand-held support is connected and fixed to allow the device to be submerged in water and to be filled with overlying water; the dissolved oxygen probe is inserted and sealed; the device is then fixed at the bottom of the water; overlying water circulation of the testing room is adjusted and controlled; and an SOD is determined. The device is simple in structure, easy to dismount, small and exquisite in size, and convenient to carry, and can effectively determine the SOD under the action of different hydrodynamic forces.
Owner:EAST CHINA NORMAL UNIV

Braking system of electric locomotive based on high-power inverter

The invention relates to the technical field of the braking of electric locomotives, particularly to a braking system of an electric locomotive based on a high-power inverter. Through a vehicle control unit, an inversion feedback system of regenerated energy is united with an eddy braking system together. The inversion feedback system of regenerated energy is adopted, when the electric locomotive brakes, a regeneration braking system preferentially supplies energy needed by eddy braking, and returns surplus energy to an electric grid. The braking system solves the problems that when only the inversion feedback system of regenerated energy is adopted, the utilizing rate of the energy returned to a traction network is low, and the voltage of the electric grid is increased, so that the power supply equipment of power substations is influenced; when only the eddy braking system is adopted, because the kinetic energy of a moving object is converted into heat energy and dissipates during eddy braking, a braking device warms, and demagnetization occurs on a permanent magnet, so that the braking fails. Through the adoption of the braking system disclosed by the invention, loading of the electric grid and loading of elements can be relieved, and besides, the utilizing rate of energy is increased, and the safety performance of the braking of the electric locomotive can be improved.
Owner:NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Self-excited atomic magnetic sensor with liquid crystal phase compensation and magnetic field measurement method

The invention discloses a self-excited atomic magnetic sensor for liquid crystal phase compensation and a magnetic field measurement method, which are used for a magnetometer. The self-excited atomicmagnetic sensor comprises a pumping light path perpendicular to the direction of the magnetic field, a probe light path along the direction of the magnetic field, and a circuit closed loop. The pumping light path sequentially comprises an atomic air chamber, a first polarizer, an acousto-optic modulator, and a laser. The probe light path sequentially comprises a photoelectric detector, an atomic air chamber in the pumping light path, a second wave plate1 / 4, a liquid crystal, a first wave plate1 / 4, a second polarizer, and a laser. The closed loop portion of the circuit comprises a photoelectricdetector, an amplifying comparator, a power driver, an acousto-optic modulator, and a counter. According to the liquid crystal phase compensation scheme, a phase shift caused by a circuit coil can beavoided, a phase shift of a larger range magnetic field can be achieved, and the problem that the circuit is unfavorable in the phase shift is solved by combining a light intensity modulation magnetometer and a self-excited magnetometer, the response speed is high, the liquid crystal phase compensation scheme is suitable for the various atomics, and the application value is high.
Owner:PEKING UNIV

Ejection type sidewall coring device

PendingCN112855058AFix coring dependence on gunpowderSolve unfavorable problemsCore removalMechanical engineeringElectromagnet
The invention discloses an ejection type sidewall coring device. The ejection type sidewall coring device comprises a collecting circuit, an electromagnet, a coring device body, an ejection head, a base, a connector and a sealing cylinder, wherein the ejection head is fixedly connected with the base, the base sleeves the electromagnet, and the electromagnet is fixed to the interior of the coring device body; one end of the sealing cylinder is connected with the connector, and the other end is connected with the coring device body; and the collecting circuit is arranged in the sealing cylinder. According to the ejection type sidewall coring device, gunpowder driving is replaced by electromagnetic ejection, and the problem of dependence of impact type sidewall coring on gunpowder can be solved.
Owner:武卫琴

Glyceryl monolinoleate coprecipitation method for preparing propolis liquid

The invention provides a glyceryl monolinoleate coprecipitation method for preparing propolis liquid, which solves the problem of dissolution rate of propolis and other bioactive components in the propolis can be kept to the maximum extent in a production process, used auxiliary materials can be widely applied to the production without limitation of a national standard use limit, the problem that after the auxiliary materials are used, side products unfavorable for a human body are generated or the auxiliary materials are unfavorable for the human body is solved, one big advantage of producing the propolis liquid by using a coprecipitation method is great reduction of residue of the propolis, practice shows that the residue of the propolis is only below 0.1% of the charged propolis, nearly no residue exists, the dissolution is thorough, a technical solution takes glyceryl monolinoleate as the auxiliary material and edible alcohol as a solvent, a precipitation technology is adopted to dissolve propolis in the glyceryl monolinoleate and forms a stable liquid state, and the alcohol is dried and recycled to obtain the propolis liquid.
Owner:杭州蜂之语蜂业股份有限公司
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