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4981results about How to "Large adjustment range" patented technology

Cement-based composite material used for 3D printing technology as well as preparation method and application thereof

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.
Owner:CHINA STATE CONSTRUCTION ENGINEERING CORPORATION

Laser indirect compound micro plastic forming device and method

InactiveCN102009268APrecise and controllable parametersGood repeatabilityLaser beam welding apparatusPunchingLaser processing
The invention discloses a laser indirect compound micro plastic forming device, belonging to the field of laser processing technology of parts of MEMS (Micro-electromechanical Systems). The laser indirect compound micro plastic forming device consists of a laser loading system, a forming system and a control system. In a laser indirect compound micro plastic forming method, pulse laser is used for driving a flying plate to move at a high speed; after moving for a certain distance, the flying plate collides with a target workpiece on a special compound micro die at a high speed; and the collided target workpiece gets high-energy momentum and is extruded between the flying plate and the special compound micro die. Since the target workpiece is limited by the special compound micro die, the target workpiece forms the shape of the special compound micro die during the extruding process. The special compound micro die is provided with hollowing dies and terrace dies which are arranged in arrays, so that the compound process of drawing, punching and trimming and batch forming of the target workpiece can be realized by primary impacting, and the hollowing dies and the terrace dies on thespecial compound micro die can be designed according to the forming and quantity of the target workpieces as required so that the batch forming of the target workpiece can be realized under differentforming requirements.
Owner:JIANGSU UNIV

Air conditioner indoor unit and control method thereof

The invention relates to an air conditioner indoor unit and a control method thereof. The air conditioner indoor unit comprises a case, an upper fan part and a lower fan part, wherein the case is provided with an air inlet, an upper air outlet and a lower air outlet below the upper air outlet; the upper fan part is arranged at the internal upper portion of the case and is used for sucking air into the case from the air inlet and exhausting the air from the upper air outlet; the lower fan part is arranged at the internal lower portion of the case and is used for sucking the air into the case from the air inlet and exhausting the air from the lower air outlet. The indoor unit further comprises at least one middle fan part, wherein the at least one middle fan part is arranged in the case, is located between the upper fan part and the lower fan part and is used for sucking the air into the case from the air inlet and exhausting the air from the upper air outlet or the lower air outlet. The air conditioner indoor unit provided by the invention has the advantages that users can freely select different air supply modes according to comfort demands, and the goal of quickly feeling refrigeration and heating effects is achieved; the adjustment range of the upper and lower air outlet volume is wide.
Owner:GREE ELECTRIC APPLIANCES INC

Multiple-degree-of-freedom suspension K&C (kinematics & compliance) property test platform

The invention discloses a multiple-degree-of-freedom suspension K&C (kinematics & compliance) property test platform, which mainly comprises a support system, a loading system, a measuring system, a movement platform system and a control system, wherein the support system is used for supporting a vehicle to be measured and the loading system, six electric cylinders in the loading system are used for driving the movement platform system to realize the six-degree-of-freedom movement, a left pier and a right pier in the loading system are slidingly connected above the movement platform system, a circular disc motor in the left pier and a circular disc motor in the right pier respectively drive a pier table to rotate, the measuring system is used for measuring the displacements and the applied forces of wheels of the vehicle to be measured, and the control system is used for collecting signals measured by the measuring system, and driving the loading system to load the vehicle to be measured. The multiple-degree-of-freedom suspension K&C property test platform has the advantages that the particular multiple-degree-of-freedom loading type is adopted, the lateral inclining angle and the longitudinal inclining angle of a real road surface can be completely simulated in the test process, the rotation inertia of the whole vehicle or component parts can be measured by little modification, the structure is simple, the measuring range is wide, and the application prospect is better.
Owner:JILIN UNIV

Vertical take-off and landing rotor aircraft with ducts built in wings

The invention relates to a vertical take-off and landing rotor aircraft with ducts built in wings, relates to the technical field of the vertical take-off and landing rotor aircraft, and particularly relates to the technical field of the vertical take-off and landing rotor aircraft with the ducts built in the wings. The wings are provided with lifting ducts; an inner bin is arranged on the inner wall of each lifting duct close to upper and lower wallboards of the wings so as to built in an duct cover; the duct cover can realize opening and closing of the lifting ducts; a diversion trench is arranged on the tail part of a fuselage; two sides of the diversion trench are provided with two supporting members and connect a tilting thrust duct arranged at the tail part of the fuselage to the fuselage through a tilting control mechanism; the tilting thrust duct is composed of coaxial tilting duct walls and coaxial thrust dual rotors; and engines are arranged in the fuselage and transmit power to the lifting duct and the tilting thrust duct through a reducer respectively. The aircraft increases an adjustable scope of the whole aircraft along an axis direction of the fuselage while not greatly weighting the whole aircraft, prevents bareness of the rotors, and increases propulsive efficiency of the aircraft.
Owner:CHINA HELICOPTER RES & DEV INST

Stiffness-adjustable magnetic vibration isolator with quasi zero stiffness

The invention belongs to the technical field of vibration and noise control and relates to a relatively-high-applicability passive isolation technology for ultralow-frequency vibration. In order to effectively solve the problem between the low-frequency vibration transmissibility and the high-frequency vibration attenuation rate of the vibration isolator, the invention provides the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness, which adopts rectangular permanent magnets generating negative stiffness and an elastic capsule providing positive stiffness; and when a load is changed, the working position of the elastic capsule is controlled unchanged, the positive stiffness of the elastic capsule is changed because the pressure inside the elastic capsule is changed, and then, the negative stiffness is matched with the positive stiffness through regulating the distance among the rectangular magnets, so that the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is adaptable to vibration isolation objects with different weights. The stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is simple in structure, convenient to mount, adjustable in bearing capacity, excellent in vibration isolation property, compact in structure, light in weight and suitable for popularization and application.
Owner:NAVAL UNIV OF ENG PLA

Touch sensor based on flexible pressure-sensitive conductive rubber

The invention provides a touch sensor based on flexible voltage-sensing conductive rubber. The invention is characterized in that a sensing unit has a structure form that: a flexible circuit board is used as a motherboard, the disc-shaped flexible voltage-sensing conductive rubber is arranged on the flexible circuit board and is electrically connected with an electrode distributed on the flexible circuit board, a stress surface at the top part of the flexible voltage-sensing conductive rubber is covered by a force transmitting hemisphere; the flexible circuit board is in a four-electrode structure, wherein, a public electrode A is a center circle electrode which is positioned on the concentric position together with the disc-shaped flexible voltage-sensing conductive rubber, a signal electrode B, a signal electrode C, and a signal electrode D which are at an angle of 120 degrees between every two are fan-shaped electrodes that are evenly distributed on a same torus of the periphery of the public electrode A. The invention relates to the touch sensor which has the advantages of strong surface suitability, high reliability, simple signal collecting circuit, and convenient manufacture, and also can be used for the three dimensional force detection.
Owner:HEFEI UNIV OF TECH

Lithium negative pole, preparation method thereof and battery comprising lithium negative pole

InactiveCN102354759AReduce the probability of dendrite formationImprove cycle performance and safety performanceElectrode carriers/collectorsSecondary cellsElectrical batteryMetal
The invention discloses a lithium negative pole, a preparation method thereof and a battery comprising the lithium negative pole. The preparation method of the lithium negative pole comprises the following specific steps: step 1, lithium embedding: coating a carbon material on an affluxion body Cu foil and drying, thereby obtaining a carbon material pole piece; packing a battery by taking a lithium metal piece as a negative pole and the carbon material pole piece as a counter electrode, carrying out charge-discharge circulation so as to finish the step of lithium embedding; and step2,deposition of a metal lithium layer through overdischarge: carrying out overdischarge on the finished embedding lithium step battery at current density of 10-100 m A/g through constant current discharging for 2-20 hours, thus the lithium negative pole is obtained on a carbon material pole piece surface electrochemical deposition lithium metal layer. The lithium negative pole provided by the invention has the advantages of taking a carbon electrode as a carrier; compared with a general lithium metal negative pole, the safety feature and the cycle performance are effectively improved, the negative pole capacity can be designed by self according to the requirements of the positive pole capacity, therefore the adjustable range is large.
Owner:SHANGHAI INST OF SPACE POWER SOURCES

Air conditioner temperature control method and air conditioner temperature control system

The invention provides an air conditioner temperature control method and an air conditioner temperature control system, wherein the method includes the following steps: indoor environment temperature and outdoor environment temperature are detected; which one of a plurality of preset temperature ranges the outdoor environment temperature lies is judged, and the temperature relation between target temperature and the outdoor environment temperature corresponding to the preset temperature range is obtained; according to the temperature relation, the target temperature is calculated; the relation between the target temperature and the indoor environment temperature is judged, and according to a judgment result, the operating state of a compressor is controlled; the target temperature increases as the outdoor environment temperature increases. The regulable range of indoor environment temperature is wider, corresponding temperature control curves are adopted for the different preset temperature ranges, the change of outdoor environment temperature can be more accurately reflected by an indoor environment, the difference between indoor temperature and outdoor temperature is small, users can be more easily adapted to the change of the difference between indoor temperature and outdoor temperature, the occurrence of air-conditioning diseases such as dizziness, sunstroke and cold can be prevented, and comfort is good.
Owner:GREE ELECTRIC APPLIANCES INC

Thermoplastic polyurethane elastomer foam bead and preparation method thereof

The invention discloses a thermoplastic polyurethane elastomer foam bead and a preparation method thereof. The method comprises the following steps: firstly, adding thermoplastic polyurethane particles and water to a reaction kettle according to the mass ratio of 1 to (0.8-4); adding liquid carbon dioxide to the reaction kettle, and controlling the intensity of pressure and the temperature in the reaction kettle, so that the carbon dioxide in the reaction kettle is in a super-critical state; raising the temperature inside the reaction kettle to 90-140 DEG C; carrying out heat preservation; putting the materials in the kettle into a pressure tank, maintaining pressure, and cooling to below 70 DEG C; foaming the thermoplastic polyurethane elastomer particles once, and controlling the volume ratio of the reaction pressure to the pressure tank to be 1 to (15-30); putting the disposable foam particles into a storage tank, and carrying out secondary normal pressure foaming to obtain thermoplastic polyurethane elastomer foam beads; and removing the surface moisture of the foam beads, and curing the foam beads at normal pressure and normal temperature for over 48 hours, so as to obtain the product. The product disclosed by the invention has the characteristics of even and compact cells, small size, high percentage of closed area, high molding product strength, good rebound resilience and the like.
Owner:新辉新材料(常州)有限公司

Method and apparatus of real-time automatic calibration and compensation for beam drift

The invention discloses a method and apparatus of real-time automatic calibration and compensation for beam drift. The method comprises the following steps that: after the primary collimation of a laser beam is conducted, the laser beam sequentially passes through three beam splitter prisms to be split to obtain a bunch of work beams and three bunches of monitoring beams; and the three bunches of monitoring beams are received by corresponding photoelectric sensing devices and are respectively used for monitoring energy drift and angular offset, parallel offset as well as collimation degree drift, and each parameter of the laser beam is adjusted in real time according to the obtained monitoring information. The device comprises a laser, a single-mode fiber, a collimating lens, a pyramid prism, a first beam splitter prism, a plano-convex lens, a first photoelectric sensing device, a second beam splitter prism, a second photoelectric sensing device, a third beam splitter prism, a rhombic prism, a third photoelectric sensing device, a computer and a nano-translation stage. The method and apparatus have the advantages of high adjustment accuracy, large adjustment range, fast and accurate adjustment process, the interference with each other is not generated, and the structure of the apparatus is concise.
Owner:ZHEJIANG UNIV
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