220 results about "Transverse pressure" patented technology

This invention is based on size and mass separation of suspended particles, including biological matter, which are made to flow in a spiral channel. On the spiral sections, the inward directed transverse pressure field from fluid shear competes with the outward directed centrifugal force to allow for separation of particles. At high velocity, centrifugal force dominates and particles move outward. At low velocities, transverse pressure dominates and the particles move inward. The magnitudes of the two opposing forces depend on flow velocity, particle size, radius of curvature of the spiral section, channel dimensions, and viscosity of the fluid. At the end of the spiral channel, a parallel array of outlets collects separated particles. For any particle size, the required channel dimension is determined by estimating the transit time to reach the side-wall. This time is a function of flow velocity, channel width, viscosity, and radius of curvature. Larger particles may reach the channel wall earlier than the smaller particles which need more time to reach the side wall. Thus a spiral channel may be envisioned by placing multiple outlets along the channel. This technique is inherently scalable over a large size range from sub-millimeter down to 1 μm.

A combination hole punching and reinforcing device for punching holes in sheets of paper and other sheet materials applies flat reinforcement rings about holes formed in those sheets concurrently as the holes are formed. The device employs a die punch, which is preferably configured as a disposable item that is detachable from the lower end of the punching ram. The die punch is configured with a punching tip at its lower extremity and a shank that is preferably narrower than the punching tip. A plurality of reinforcement rings are stacked one atop each other and are carried upon a shoulder formed at the demarcation between the die punch tip and the die punch shank. A transverse pressure plate located atop the shank applies pressure to sequentially affix the lowermost reinforcement ring in the stack to a sheet of paper concurrently with the formation of an aperture through that sheet. Each reinforcement ring is formed with a pressure-sensitive adhesive on its undersurface and an upper surface treated with a silicone release coating. Therefore, once each lowermost reinforcement ring is attached about an aperture formed in a sheet of paper, the remaining reinforcement rings in the stack are lifted by the die punch and detached from the lowermost ring.

A pressure fluid actuated downhole percussion tool includes a reciprocating piston hammer with differential transverse pressure surfaces cooperable with a cylinder housing, a guide sleeve and a bit carried exhaust tube to form opposed pressure fluid chambers to which pressure fluid may be conducted to deliver repeated impact blows to a bit having circumferentially spaced bosses and replaceable cutting inserts. The bit is drivenly connected to the tool by plural drive pins supported in circumferentially spaced grooves in the bit shank and in a removable sub supported by the tool housing. Improved earth penetration performance is realized utilizing a claw bit with a pressure fluid actuated percussion tool providing rotation as well as selective deliverance of impact blows through the bit.

The invention discloses a domestic garbage processor, which comprises a chassis and a grinding device. One end of the grinding device is provided with a feed hopper, while the other end thereof is connected with a garbage forming device. The domestic garbage processor is characterized in that the garbage forming device is a transversely arranged cylinder; one end inside the cylinder is provided with a first transverse pressure device, while the other end thereof is provided with a solid discharge hole and a liquid outlet; the outside of the solid discharge hole is fixedly provided with a connecting plate; the connecting plate is connected with a second transverse pressure device by a guide post; a garbage bin is fixedly arranged between the first and second transverse pressure devices; the front end of the second transverse pressure device is provided with a garbage bin cover; and the upper end of the connecting plate of the solid discharge hole is provided with a pushing device. The domestic garbage processor has the advantages that the garbage which is originally wasted and can pollute the environment can be used as the fertilizer or the fuel after being processed by the device; and the waste water also can be used for plant irrigation.

The invention relates to a bidirectional composite stress loading test device for a test piece of a brick body and belongs to the field of civil engineering. The device mainly comprises an adjustable reaction frame, a pressurization screw stem and a mouth-shaped frame; the steel reaction frame which can adjust distance and the pressurization screw stem with a force transducer are utilized to realize the loading of transverse pressure or tensile force of the test piece of the brick body; and the largest loading value of the pressurization screw stem can reach 150 kN. The steel reaction frame consists of a steel plate and a screw stem; and the relative distance of the steel plate of the reaction frame can be flexibly adjusted so as to meet the requirement of the test pieces with different specifications. The vertical direction of the test piece is matched with the prior hydraulic jack to realize a full-process bidirectional loading test on the test piece of the brick body. The loading device has a simple structure, convenient disassembly and assembly and small occupied area, can be repeatedly used, can move, is convenient to load and control, has accurate and reliable tested data and can fully meet the loading requirement of the bidirectional composite stress loading test on the test piece of the brick body.

A method and mechanism of producing a suction and periodic excitation flow. The method includes providing fluid flow from jet port with diameter d1 at a controlled input pressure (Pin), directing the flow to a conduit with diameter d2, >d1, allowing additional fluid to join the flow through suction slot(s) to create an amplified flow in the conduit, further directing the amplified flow in a first direction by applying a transverse pressure differential, further redirecting the amplified flow in another direction by modifying an angle by which the transverse pressure differential is applied and iteratively repeating the further directing and further redirecting so that the amplified flow oscillates between the directions. The suction and periodic excitation flows may be employed, for example, to effectively control boundary layer separation. A mechanism for automated performance of the method is also disclosed.

The invention discloses a submarine optical fiber composite high-voltage cable with a detection function. The cable comprises cable cores, an inner armor layer and an outer armor layer, wherein the inner armor layer is twisted on the cable cores; the outer armor layer is twisted on the inner armor layer; an outer sheath is formed on the outer armor layer by extrusion molding; an optical fiber sensor unit is arranged in a gap of the cable cores of the cable for measuring the temperature of the cable; and a bedding layer is arranged between the inner armor layer and the outer armor layer and an optical fiber sensor unit is distributed between the inner armor layer and the outer armor layer for detecting damage of the cable. A natural characteristic that transmission loss is increased when the optical fiber is used for bearing bending or transverse pressure is used, the damage of the cable can be detected, and accurate positioning can be realized through an instrument. The optical fiber sensor in the cable cores is used for measuring the temperature variation of the cable core of power cables.

The invention discloses a fiber grating sensing system capable of simultaneously measuring transverse pressure and temperature based on polarization measurement, and belongs to the field of optical fiber sensing. The fiber grating sensing system mainly comprises a tunable laser with high stability, an optical isolator, an optical circulator, a Bragg fiber grating, a polarization-dependent loss tester and a spectrum analyzer. When the fiber grating is subject to the simultaneous action of transverse pressure and temperature, the polarization-dependent loss property of the transmission end obviously changes due to the dual-deflection effect, and the size of the transverse pressure can be demodulated through the measurement of the polarization-dependent loss tester. The reflective light of the fiber grating is inputted to the spectrum analyzer through the optical circulator, and the temperature is measured by analyzing the movement of the center wavelength of the reflective light spectrum. The fiber grating sensing system has the advantages that the dual parameters of the transverse pressure and the temperature can be simultaneously measured, the sensitivity is high, the structure is simple, and the full-light sensing is realized.

The invention relates to a stereo planting bag and a planting method of the stereo planting bag. Linear planting seams which are horizontally arranged in an array are formed on the side face of a cylindrical barrel body from top to bottom, after the 'broken' bag is filled with planting soil, the bag is spread due to horizontal pressure of the soft soil to form a cylinder shape, the planting seams become and remain a linear state, plants are planted in the linear seams and the top surface of the cylindrical barrel body, the linear seams can automatically turn back to and remain a closed state so that the planting soil can be prevented from loss, and the linear seams can also be used for top dressing. Multiple stereo planting 'broken' bags can be arranged at intervals and can also be hung. The stereo planting bag and the planting method of the stereo planting bag have the advantages that a precedent of omni-directional stereo planting through the 'broken' bag with the multiple linear seams is achieved, the stereo planting bag is wide in application scope, easy to manufacture, low in cost, good in ventilation effect and capable of reducing pests and diseases, and the effective planting area can be multiplied.

The invention provides a method for simply and conveniently detecting nonmetal underground drainage pipeline leakage and a device. The method comprises the following steps: a detector is used for detecting the traverse pressure of a buried pipeline with water, an independent resistance measuring apparatus is used for detecting a soil resistance value above the buried pipeline, a detection electrode is inserted for adjusting the size of a detection electric current sent out by the detector according to different soil resistance values, an electric current detection device which is connected to the detection electrode is used for collecting leakage electric currents in real time and transmitting data of the electric current detection device to the measuring apparatus, and a computer is used for analyzing so as to obtain the accurate position of a damage pipeline.

Process for improving planeness of a metal sheet, in which the sheet is stretched between two jaws for a period of time, applying a controlled permanent elongation of greater than 0.5%. Transverse pressure is applied on at least one face of the sheet during at least part of the period time during which stretching is applied with at least one longitudinally movable roll, or with a metal bar clamped to an opposite face of the sheet.

The invention provides a transverse pressure gradient controlled ride wave forebody and air inlet channel integrated designing method and relates to a near space hypersonic flight vehicle. The method comprises the steps of designing a basic flow field required by a two-dimensional air inlet channel; confirming the position where a designed cross section is located; designing projection of front edge capture molded lines in the designed cross section according the working condition requirements and calculating projection distances from front edge points in wedge tangent planes to shock wave points in z-direction; obtaining pressure distribution of compression molded lines at the positions of the wedge tangent planes corresponding to disperse shock wave points; obtaining newly-generated two-dimensional air inlet channel compression molded lines by applying two-dimensional characteristic line method according to calculated pressure distribution; arranging the two-dimensional air inlet channel compression molded lines at the positions of the corresponding front edge capture molded lines to form a complete air inlet channel compression profile, obtaining a ride wave forebody and air inlet channel integrated device after three-dimensional modeling and finishing the transverse pressure gradient controlled ride wave forebody and air inlet channel integrated design. By adopting the method, the device can have high lifting drag characteristic, external flow resistance is reduced while engine thrust is increased.

The invention discloses a slab core of a structural slab. The slab core is provided with multiple structure units, the structure units are sequentially stacked and attached in an adhesive mode in the length direction of the structural slab, each structure unit comprises a substrates and a shearing force body inclined relative to the substrate, the substrates are stacked in the length direction of the structural slab to form a frame shearing force structure, each substrate is provided with a continuous transverse pressure-bearing body and a vertical pressure-bearing body extending in the thickness direction of the structural slab, each shearing force body at least comprises two layers of shearing force layers and a plurality of shearing force piece strips arranged at intervals, and one shearing force piece strip and the shearing force piece strips corresponding to the adjacent shearing force layers in position are crossed and stacked. By means of the arrangement, the frame shearing force structure can be formed, the strength of the structural slab is effectively improved, the bearing capacity of the structural slab is improved, consumption of wood resources is reduced, energy is saved and environment protection is achieved. On the basis of the slab core, the invention further provides the structural slab with the slab core and a machining method of the slab core of the structural slab.

The invention discloses a pohotonic crystal fiber grating pressure sensing method adopting the bimodal reflectance spectrum of a cross-polarized mode, and belongs to the field of pohotonic crystal fiber grating sensing. The method solves the problem that transversal stress can not be measured through an existing fiber grating sensing method. Light emitted by a light source is coupled by a coupler and then enters a pohotonic crystal fiber grating stressed with external force F perpendicular to the pohotonic crystal fiber grating. The pohotonic crystal fiber grating generates reflected light and is a polarization-dependent grating; the spectrum difference of the reflected light appears in the cross-polarization direction, and namely a reflectance spectrum bimodal curve appears. When the pohotonic crystal fiber grating is stressed with transverse pressure, the polarization property difference of a cladding material appears in the stress direction and the direction perpendicular to the stress direction due to the internal stress of the cladding material, the light reflectance spectrum bimodal curve moves, the bimodal distance changes at the same time, and the reflected light is converted into electrical signals through a photoelectric converter. A detection analyzer works out the pressure sensing quantity value through conversion according to sensing signals. The method is mainly applied to the pressure sensing field.

The invention provides a groove impairment structure of a novel turbine blade grid end wall. The structure is arranged on the turbine blade grid end wall, and is used for reducing secondary flow losses. The turbine blade grid end wall is located on the hub side of a plurality of turbine blades arranged in an annular mode. The invention further provides a corresponding method. The groove impairment structure of the novel turbine blade grid end wall is arranged on the turbine blade grid end wall, and is connected with the turbine blade grid end wall through a laser machining method. Transverse motion of end fluid can be obstructed, transverse pressure gradient can be reduced, and therefore the strength of a horseshoe vortex pressure side branch and a channel vortex is reduced, and the aim of reducing the secondary flow losses is achieved.

The invention relates to a silicon on insulator (SOI)-based metal-oxide-semiconductor field-effect transistor (PMOSFET) power device and belongs to the technical field of power semiconductor devices. An N type SOI rib is adopted for the SOI-based PMOSFET power device so that the SOI-based PMOSFET power device can be integrated with an N channel power device conveniently. Simultaneously, a drift region of the SOI-based PMOSFET power device is formed by injecting a P type well region on the surface of an N type SOI semiconductor layer of the N type SOI rib, and in the reverse blocking state, the electric potential of the N type SOI semiconductor layer is high raised to perform two-dimensional exhausting for the P type drift region to generate a reduced surface electric field (RESURF) effect, accordingly puncture voltage and drift region concentration of the device are effectively improved, and on-resistance is greatly reduced. In addition, the SOI-based PMOSFET power device bears transverse pressure drop through a medium trough, can achieve high puncture voltage with small device transverse size, and accordingly can effectively reduce the transverse size.

A system and method of determining hemodynamic parameters uses sensed ventricular blood pressure during a portion of ventricular pressure waveform following peak pressure. An estimated arterial diastolic pressure is based upon an amplitude of the sensed ventricular pressure corresponding to a time at which a first derivative of ventricular pressure as a function of time is at a minimum (dP/dt_min). Fill parameters such as isovolumetric relaxation constant, ventricular suction pressure, atrial kick pressure, and transvalve pressure gradient are derived from measured pressures representing minimum ventricular pressure, ventricular diastolic pressure, and diastasis pressure.

Cross bars 18, to which workpiece holders 19 are attached, are provided across a press line L, together with feed beams 14 between which the cross bars are installed and which are suspended from the lift beams 13 and can move freely in the horizontal direction of the press line. A feed and transfer device 52 can move the feed beams freely in the horizontal direction of the press line. A connecting rod 56 connects the feed beams and the rack beam in a freely rotatable manner. A connecting link 60 connects a point in the vicinity of an intermediate portion of the connecting rod to a bracket 58 installed on the rack beam, in a freely rotatable manner. An operating direction changeover mechanism 61 converts the differential movement caused by the curvature of the press transfer motion, produced in the feed beams when the lift beams are raised or lowered, into a horizontal movement in the direction of the press line in synchronism with the raising or lowering of the lift beams.

The invention discloses a fiber bragg grating transverse pressure transducer system based on a microwave photonic filter and a measuring method thereof. The system comprises a broadband light source, an electro-optic intensity modulator, an optical fiber coupler, a fiber bragg grating, an optical fiber polarization beam splitter, an adjustable optical fiber delay line, an adjustable optical fiber attenuator, a chromatic dispersion compensation optical fiber, a photoelectric detector and a vector network analyzer. When the fiber bragg grating is subjected to the effect of a transverse pressure, two beams of optical signals with different center wavelengths will be reflected because of a birefringence effect. The two beams of optical signals are respectively corresponding to different polarization directions. When the transverse pressure changes, a center wavelength difference of the two beams of reflected light will change so as to change the resonant frequency of a microwave photonic notching filter. A frequency response curve of the filter is measured by the vector network analyzer to obtain the resonance center frequency to realize measurement of the transverse pressure. The fiber bragg grating transverse pressure transducer system of the invention is advantaged by being high in resolution, adjustable in sensitivity and capable of realizing long distance transverse pressure measurement in an electromagnetic interference preventing mode.

The invention provides a double-plug piping method of a heavy-caliber gas exhaust hole working sleeve. The method comprises the following steps of: preparing a buoyancy plug and a buoyancy valve; piping by a suspending method; welding the buoyancy plug; piping by a buoyancy plug piping method; welding the buoyancy valve; filling high-pressure gas in the region between the buoyancy plug and the buoyancy valve; continuously piping to the hole bottom by the buoyancy plug piping method; drilling and breaking the buoyancy valve to release the high-pressure gas; and piercing the buoyancy valve and the buoyancy plug; and cementing wells. According to the invention, the problem that the transverse pressure of exterior mud to a hollow pipe is too large during the buoyancy plug piping construction is solved, the danger of instability of a working sleeve is reduced, the buoyancy upper limit is increased in comparison with the conventional buoyancy plug method, and a drilling machine with less load capacity can be used for piping under the same condition.