47results about How to "Guaranteed isotropy" patented technology

The invention discloses a portable auxiliary calibration device for fishery acoustic equipment and a calibration method thereof. For fixing the acoustic probe, one end of each elastic rope is connected to equally spaced parts around the bottom of the frustum-shaped support, and the other end is converged to connect the calibration ball, and the calibration ball is fixed at the center of the bottom of the frustum-shaped support; each fishing line One end of one end is also converging to connect the calibration balls, and the other ends are respectively extended to the top of the fixing frame along the equally spaced distribution parts on the truncated cone-shaped bracket; the calibration device uses a bracket with a certain weight to fix the acoustic probe and the calibration balls, which can reduce the water flow. The impact on the equipment; the calibration ball is fixed on the bracket with an elastic rope, and the calibration ball can be automatically reset under the action of the elastic force.

A method for manufacturing modified sepiolite fiber reinforced rubber asphalt, the specific steps include: step 1) completely immerse the sepiolite fiber in a solution containing cyclodextrin and sodium hydroxide at 50-60°C for 10-15 minutes, and After drying, the pretreated sepiolite fiber is obtained. The content of sodium hydroxide in the solution is 5-10wt%, and the content of cyclodextrin is 2-4wt%. The capacity is not good, it is easy to form agglomerates in the premixing process, and the dispersion effect is not good. The present invention pretreats the sepiolite fiber + activates the surface to treat the surface, and strengthens the phase of the reaction system between the sepiolite fiber and the asphalt material. Capacitive, can ensure its uniform dispersion in the reaction system, so as to ensure the isotropy of asphalt pavement.

The invention discloses a high-viscosity modified asphalt and a preparation method thereof, belonging to the technical field of road engineering materials. The high-viscosity modified asphalt raw materials include: 500 parts of matrix asphalt, 300-400 parts of additives and 10-20 parts of composite reinforcing fibers; The composite reinforcing fiber is prepared by compounding basalt fiber and polyester fiber and then wrapping the asphalt matrix film; when preparing high-viscosity modified asphalt, the present invention can not only greatly improve the cohesiveness of the asphalt pavement by adding composite reinforcing fiber , high temperature stability, fatigue durability, and has the performance of low temperature crack resistance and reflection crack prevention. Effectively improve tensile, shear, compressive and impact strength, improve thermal stability and low temperature resistance.

The invention provides a method for preparing an orderly multi-macropore ceramic material, belonging to the inorganic nonmetal material filed. The invention relates to an improvement of the method for preparing the pore structure orderly controlled macropore ceramic material. The method comprises the following steps that: a cementing compound water solution is prepared; a ceramic raw material is prepared; a dispersant and a regulator are weighed; the raw materials are mixed and ball grinded; the mixture is coated on microballoons; the mixture is dried, pressed, parched and sintered. The aperture of the multi-macropore material is monodispersed, thereby having good mechanical property. The production is realized without a centrifugal device, thereby greatly lowering the production cost. The porosity of the multi-macropore is adjusted conveniently, thereby meeting the requirement of the material with different porosities.

The invention discloses a fabrication method of a compound mica tape. The method is characterized in that 2%-15% reinforced fiber is directly added in the conventional fabrication process of mica paper, and the reinforced fiber is directly doped with the mica paper, so that the fabricated mica tape can be used and is not required to be compounded with a reinforced layer. The method is easy and simple to operate and requires no compound procedure, an insulation effect of the traditional mica tape can be achieved by directly doping the reinforced fiber with the mica paper, the isotropy of electric insulating properties after once molding of the reinforced fiber and the mica paper is ensured, and the insulation thickness of the mica tape is reduced.

The invention relates to the technical field of brick making, in particular to a mold for making energy-saving porous bricks and a method for forming porous bricks by the mold. The inner space of the mold formed after the installation of the upper mold base, the lower mold base and the mold frame is the cavity forming the overall shape of the porous brick. The conduit fixed on the lower mold base forms the pores of the porous brick, and after the installation is completed The conduit and the lower drainage tube of the mold base and the upper drainage tube of the upper mold base can form a loop of circulation. During sintering, by pouring hot water into the water tank, the hot water circulates in the lower drainage pipe of the lower mold base, the conduit of the lower mold base and the upper drainage tube of the upper mold base, and flows back into the water tank after flowing through each conduit. Make the hot water form a circulation loop. In this process, the heat energy of the hot water is transferred to each position of the billet through each conduit, thereby effectively sintering the billet. The way the heat of the sintered billet diffuses from the inside of the billet can ensure that the whole billet is heated evenly, thereby ensuring that each of the porous bricks same-sex.

The present invention relates to a silicon carbide base composite material reflector with honeycomb sandwich structure. It is characterized by that after the upper cover plate, sandwich layer with honeycomb structure and lower cover plate are bonded, then they are undergone the processes of siliconing and sintering treatment so as to obtain the invented reflector whole body with the characteristics of light weight, high rigidity and good workability, etc. Besides, said invention also provides its preparation method and concrete steps.

The invention relates to an electric cylinder load and life test device which is high in test efficiency, convenient to use and high in adaptability. The electric cylinder load and life test device comprises a test bench, a connector, accessories and a control system, wherein the test bench is used for supporting two electric cylinders, the connector is used for connecting driving rods of the two electric cylinders, the accessories are used for respectively fixing the two electric cylinders and keeping the two electric cylinders in the same linear direction, and the control system is used for controlling motors of the electric cylinders and acquiring tension data or pressure data of interaction of the two electric cylinders. The control system comprises a force sensor, a driver, a controller and a computer, wherein the force sensor is connected between the two driving rods, the driver is used for directly controlling rotation of the motors, the controller is used for transmitting control commands to the driver and respectively acquiring information fed back by the force sensor and the motors, and the computer is used for transmitting the commands and extracting the data through the controller. When load and life tests are made, the two driving rods are the same in moving direction, and an elastic connecting device for buffering is arranged between the driving rods.