39results about How to "Clear design principles" patented technology

The invention provides a ground state single-transmission peak atom light filter and a method using the light filter for light filtering. The atom light filter comprises an alkali metal atomic bubble, two polarizing films, a magnetic field source and a temperature control system, wherein the alkali metal atomic bubble is filled with inert gas. When the atom light filter is used for the light filtering, polarizing directions of the two polarizing films can be firstly adjusted to be mutually vertical, and light selection can be carried out for incident lights; the temperature control system can be utilized for controlling the temperature of the alkali metal atomic bubble at 30 DEG C to 120 DEG C; and then light rotation can be carried out for the incident lights by utilizing a faraday anomalous dispersion effect of alkali metal atom in a uniform magnetic field, and a single-transmission peak light spectrum can be obtained. According to the invention, the faraday anomalous dispersion effect which is realized after the inert gas and alkali metal gas are mixed is utilized, the design principle is clear, the structure is simple, the working is stable, and the laser performance is high.

The invention relates to a method of monitoring rusting risk of reinforcement in concrete in situ. The method includes the steps of 1, according to the principle of plane state of stress and stress concentration, applying prestress to rusting monitoring sensing units to enable them to be in a plane state of stress; 2, packaging three sides of each rusting monitoring sensing unit, and reserving one side as a rusting monitoring side; 3, distributing the rusting monitoring sensing units at equal intervals within a rectangular steel frame, before concreting, distributing the rectangular steel frame and the outer surface of concrete at a certain angle in an area to be subjected to reinforcement rusting monitoring, allowing the rusting monitoring sides to face a protective layer, and performing rusting monitoring through continuous strain measurement of different sectional heights of sheets. The method has the advantages that monitoring chloride threshold concentration fronts at different depths is achieved, initial rusting time of the reinforcement is predicted, results are updated according to monitoring data, the rusting monitoring sensing units as deep as the reinforcement allow the final initial rusting time, rusting rate and rusting degree of the reinforcement to be directly monitored.

The invention discloses an all-optical switch based on a rubidium-atom optical filter and a method thereof. The all-optical switch based on the rubidium-atom optical filter comprises an alkali-metal rubidium-atom glass air chamber with a V-type energy level structure, two Glan-Taylor polarizers with the polarization directions perpendicular to each other and a stable magnetic field source used for generating a magnetic field with uniform intensity for the alkali-metal rubidium-atom glass air chamber, wherein the alkali-metal rubidium-atom glass air chamber, the two polarizers with the polarization directions perpendicular to each other and the stable magnetic field source form a standard atomic optical filter. The all-optical switch based on the rubidium-atom optical filter further comprises a 420 nm laser device serving as a control part of the all-optical switch of the atomic optical filter and a 780 nm laser device serving as a performance testing and application wavelength testing part of the all-optical switch of the rubidium-atom optical filter. The all-optical switch based on the rubidium-atom optical filter has the advantages of being clear in design principle, simple in structure, easy to manufacture, good in switching performance, stable in operation and long in service life.

The invention discloses a two-way axial-flow pump impeller based on an inclined V symmetrical wing type and a design method for the two-way axial-flow pump impeller, and belongs to the technical field of hydraulic engineering. The impeller comprises blades and a hub; wheel rim diameter of the impeller is 300 mm; a hub ratio is 0.4667; the four blades are uniformly distributed in the peripheral direction of the hub; wing types of the blades are inclined V symmetrical wing types; center lines of single-sided wing types of the blade wing types are in the shape of inclined V; maximum thickness of a hub side wing type is 12 mm; maximum thickness of a wheel rim side wing type is 6 mm; and section of a middle wing type is linearly changed according to the maximum thickness. A design method for the impeller comprises the following steps of: step A: designing a two-way axial-flow pump wing type; and step B: designing a two-way axial-flow pump impeller. The optimal point of cavitation performance of the two-way axial-flow pump adopting the inclined V symmetrical wing type design is close to a zero-head working condition point; and the optimal point of the cavitation performance of a common one-way pump is close to an efficient point. At the efficient point, the cavitation performance of the two-way pump adopting the inclined V wing type reaches the level of the one-way pump.

The invention discloses a mixed gas multi-waveband atomic optical filter and a method thereof. The mixed gas multi-waveband atomic optical filter comprises a glass gas chamber with mixed alkali metal rubidium and cesium atoms, a first Glan Taylor prism and a second Glan Taylor prism which are orthometric in the direction of polarization of light, and a stable magnetic field source. The prisms are arranged at two sides of the glass gas chamber with the mixed alkali metal rubidium and cesium atoms and right face to the alkali metal atom glass gas chamber, and complete Faraday rotation effect can be achieved through the mixed rubidium and cesium atoms of the glass gas chamber with the mixed alkali metal rubidium and cesium atoms and laser; the stable magnetic field source is used for producing a gradient magnetic field with changing strength onto the glass gas chamber with the mixed alkali metal rubidium and cesium atoms, and the direction of the magnetic field of the gradient magnetic field is parallel to the direction of light propagation. The filter has the advantages that the filter is simple in structure, easy to manufacture, fine in performance, stable in operation and long in service life.

The invention discloses an integrated atom beam type optical frequency standard comprising an electrical cabinet and an optical cabinet. The electrical cabinet consisting of a control device, a measurement device, and a display device provides power for all devices of the optical cabinet and outputs a control signal and a frequency locking signal to the optical cabinet. The optical cabinet including an atomic beam tube, a laser device and an ultra-stable laser system outputs an ultra-stable resonant cavity signal and an atomic spectrum signal to the electrical cabinet; the atomic beam tube isan integrated calcium atom beam sealing tube; and the laser device includes a 423-nm laser device and a 657-nm laser device. On the basis of the optical frequency standard design, problems of many laser devices and complicated system of other optical frequency standard systems are solved; and the provided optical frequency standard is expected to be a first commercial time-keeping optical frequency standard capable of working continuously. The optical frequency standard based on the clear design principle has the high scientificity and engineering achievablility and a leading-edge novel designin the optical frequency standard field is provided.

The invention relates to a detection apparatus and method for the swing frequency error and swing zeroing error of a rotary table, belonging to the technical field of testing of inertial devices. According to the invention, magnetic steel is fixedly mounted on a detected rotation frame or side end face of the rotary table; a Hall sensor and a processing circuit are fixedly arranged on an immovable foundation; once the magnetic steel faces an induction surface of the Hall sensor, a TTL level induction signal is generated; a rotary-table calibrating device acquires TTL level induction signals and calculates the cycle length of adjacent TTL level induction signals so as to obtain the error of the swing frequency of the rotary table; a digital level meter is arranged on the reference surface of the detected frame of the rotary table; a photoelectric autocollimator collimates the center of a reflective mirror on the rotary table; and the digital level meter and the photoelectric autocollimator test the states of the rotary table before and after swing test and then data processing is carried out so as to obtain the swing zeroing error. The detection apparatus and method provided by the invention can detect the swing frequency errors and swing zeroing errors of rotary tables of different types, and has the characteristics of good applicability, high accuracy, convenience and rapidness.

The invention relates to a three-dimensional broadband absorption-type frequency selection structure based on a ferrite wave-absorbing material. According to the invention, a periodic distribution structure is adopted, a structural unit adopts a structure mode of combining a band-pass channel with a wave-absorbing channel, and a wide pass band can be realized and two wave-absorbing bands can be realized at two sides of the pass band in combination with a metal bending line and a specific wave-absorbing material. An upper-layer parallel plate waveguide of the structural unit is composed of a metal bending line, an air cavity and the ferrite wave-absorbing material. A lower-layer parallel plate waveguide is composed of a metallized via hole and a dielectric substrate. According to the invention, a low-insertion-loss passband and two wide wave-absorbing bands can be realized, and good stability is achieved for obliquely incident electromagnetic waves. The structure not only can be appliedto the reduction of a single-station radar cross section (RCS), but also can be applied to the reduction of RCSs of double stations and even multiple stations.

The invention provides an optical fiber winding device for optical fiber macrobending loss measurement and an optical fiber winding method. The optical fiber winding device comprises a horizontally arranged rotating bracket and a core shaft vertically arranged at the center of the rotating bracket, and is characterized in that an end plate at one end of the rotating bracket is used for placing an optical fiber reel, the core shaft and the rotating bracket are movably connected, and the bottom end of the core shaft penetrates through the rotating bracket and is fixedly arranged; the optical fiber reel is arranged on the end plate at one end of the rotating bracket, one end of an optical fiber on the optical fiber reel is fixed on the core shaft, the rotating bracket rotates by taking the core shaft as an axis, and the optical fiber reel rotates towards a direction opposite to the rotating direction of the rotating bracket while moving along with the rotating bracket. The optical fiber winding device can achieve a purpose of directly winding an optical fiber without removing the optical fiber on an optical time-domain reflectometer, avoids an attenuation error generated in optical fiber macrobending loss measurement, ensures the optical fiber not to generate torsion stress in the winding process through the overall device structure and ensures the accuracy of optical fiber macrobending loss measurement.

The invention discloses a broadband vertical transition device. The broadband vertical transition device is of a two-layer or multi-layer dielectric slab structure and comprises a trough line resonator which is arranged on a public area between layers of the two-layer or multi-layer dielectric slab structure and has a regular shape, a microstrip line resonator arranged on the top layer of the two-layer or multi-layer dielectric slab structure, and a microstrip line resonator arranged on the bottom layer of the two-layer or multi-layer dielectric slab structure, wherein both the microstrip line resonator arranged on the top layer and the microstrip line resonator arranged on the bottom layer are perpendicular to the trough line resonator arranged on the public area, and the microstrip line resonator arranged on the top layer and the microstrip line resonator arranged on the bottom layer are completely consistent and symmetrical about the public area in the vertical direction. The broadband vertical transition device has broadband transmission characteristic and can achieve smoothing response of three in-band transmission poles. The broadband vertical transition device is clear in design principle, simple in structure, easy to manufacture and low in cost.

The invention discloses a cable-force-adjustable anchor pull anti-slide pile. Prestress anchor cables are additionally arranged within the range of 1.5-4.5 m below the top of the anti-slide pile, anda cable force adjusting device is additionally arranged at the anchoring end of each anchor cable, wherein each cable force adjusting device comprises a cable adjusting device, a tensioning device anda connecting device for connecting the tensioning device with the cable adjusting device. The cable adjusting devices are used for controlling the magnitude of cable force and increasing or decreasing the cable force of anchor cables according to the project needs. The tensioning devices are used for providing or releasing tensioning force for tension compensation. According to the cable-force-adjustable anchor pull anti-slide pile, the cable force of the anchor pull pile can still be adjusted after project completion and operation, so that the prestress loss of the anti-slide pile is compensated.

The invention discloses a girder type test device for bonding intensity between a fiber-enhanced composite rib material and concrete. The girder type test device is used for testing performances of an FRP-concrete test piece, wherein an FRP rib is buried in the FRP-concrete test piece. The girder type test device comprises a first steel girder, a second steel girder, a distribution girder and a press plate, wherein the upper parts of the two ends of the first steel girder and the second steel girder are hinged to each other by a steel bar articulated element, and simultaneously, the lower parts of the first steel girder and the second steel girder are fixedly connected by a fixing steel plate; the distribution girder is arranged above the first steel girder and the second girder, and a central axis passes through a hinged point; two pressure plates are arranged on the lower of the second steel girder; and the FRP-concrete test piece is arranged in the first steel girder, and the FRP rib passes through the hinged end of the first steel girder, and extends between the two pressure plates for fixing. The device can eliminate geometric eccentricity of a preliminary test, guarantees that applied pulling force is an axle center stretching load, and raises test accuracy.

The invention discloses an automatic design method for a novel axial flow pump impeller based on a Brewkovski airfoil profile, belongs to the technical field of hydraulic engineering equipment. Parameters of the blade grid density, the axial surface speed, the rotation component speed, the blade chord placing angle, the airfoil profile camber and thickness are determined; a design method of the system is formed through coordinate transformation and graphic display. The method is scientific, the design principle is clear, the model design of the axial flow pump becomes simpler and more convenient from theoretical analysis to model establishment and from program design to model output, the operation efficiency and precision of the axial flow pump are improved, theoretical guidance is provided for researchers in various fields, and technical support is also provided for axial flow pump manufacturers.

The invention provides a separate injection well separate injection technology boundary comprehensive judgment method. According to the separate injection well separate injection technology boundary comprehensive judgment method, a ground water injection system-water injection wellbore-water distribution nozzle-injection-production well chamber-oil well wellbore five-node integrated design methodis adopted, the 'interlayer flow difference' is taken as a characteristic variable, selective balanced water injection is taken as a design target, a water nozzle adjustment process boundary and an oil reservoir boundary are comprehensively considered, a comprehensive boundary chart is established, separate injection process selection is guided, a test and regulation process mode is optimized, thetest and regulation period can be effectively prolonged, the labor intensity of personnel is reduced, and the separate injection development effect is improved.

The invention discloses an all-optical switch based on a rubidium-atom optical filter and a method thereof. The all-optical switch based on the rubidium-atom optical filter comprises an alkali-metal rubidium-atom glass air chamber with a V-type energy level structure, two Glan-Taylor polarizers with the polarization directions perpendicular to each other and a stable magnetic field source used for generating a magnetic field with uniform intensity for the alkali-metal rubidium-atom glass air chamber, wherein the alkali-metal rubidium-atom glass air chamber, the two polarizers with the polarization directions perpendicular to each other and the stable magnetic field source form a standard atomic optical filter. The all-optical switch based on the rubidium-atom optical filter further comprises a 420 nm laser device serving as a control part of the all-optical switch of the atomic optical filter and a 780 nm laser device serving as a performance testing and application wavelength testing part of the all-optical switch of the rubidium-atom optical filter. The all-optical switch based on the rubidium-atom optical filter has the advantages of being clear in design principle, simple in structure, easy to manufacture, good in switching performance, stable in operation and long in service life.

The invention relates to an atomic optical rotation type band-rejection trap. The atomic optical rotation type band-rejection trap comprises a first atomic gas chamber filled with atomic gas, two Glan-Taylor prisms, a stable static magnetic field source, a second atomic gas chamber filled with atomic gas and two temperature control circuit systems, wherein the two Glan-Taylor prisms are parallel to each other in the polarization directions of two beams of light and are disposed on two sides of the first atomic gas chamber, and gas atoms in the first atomic gas chamber and laser can have sufficient Faraday optical rotation effect under the condition of an external magnetic field; the stable static magnetic field source generates an even static magnetic field for the first atomic gas chamber, and the magnetic field direction is parallel to the laser propagation direction; the second atomic gas chamber and the laser can have saturated absorption effect; the two temperature control circuit systems act on the first atomic gas chamber and the second atomic gas chamber respectively. The invention further discloses an application method of the atomic optical rotation type band-rejection trap. The atomic optical rotation type band-rejection trap and the application thereof have the advantages that narrow-band band-rejection characteristics on specific wavelengths, high transmittance beyond a rejection band and a high rejection ratio in the rejection band are obtained through controllable Faraday anomalous dispersion effect and saturated absorption effect at the atomic transition wavelength position.

The invention relates to a unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and a method for filtering by adopting the atomic filter. The filter consists of components of an external cavity laser 1, an optical isolator 2, a first semipermeable semi-reflective mirror 3, a second semipermeable semi-reflective mirror 4, a first high reflectivity mirror 5, a natural rubidium cell 6 and the like. According to the unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and the filter method thereof, by using the Faraday anomalous dispersion effect of isotopic 87 Rb ground state atoms in a magnetic field, a uniform magnetic field is generated through a magnetic field source, such as a permanent magnet, and the laser and atoms are interacted, so the laser polarization direction is changed. The laser transmission polarization direction is limited by two polarizing prisms, the light wave with specific frequency is chosen, and the goal of filtering is achieved. A system is enabled to be in a good working condition through a temperature control system. The unimodal atomic filter has the advantages of simple structure, high filtering performance, work stability, long service life and the transmission rate of being more than 78.0%. The unimodal 87 Rb isotopic atomic filter used for laser frequency stabilization and the filter method thereof have important significance in the experiment with interaction between light and atoms.

The invention provides a single-transmission peak atom light filter and a method using the light filter for light filtering. The atom light filter comprises an alkali metal atomic bubble, two polarizing films, a magnetic field source and a temperature control system, wherein the alkali metal atomic bubble is filled with inert gas. When the atom light filter is used for the light filtering, polarizing directions of the two polarizing films can be firstly adjusted to be mutually vertical, and light selection can be carried out for incident lights; the temperature control system can be utilized for controlling the temperature of the alkali metal atomic bubble; and then light rotation can be carried out for the incident lights by utilizing a faraday anomalous dispersion effect of alkali metal atom in a uniform magnetic field, and a single-transmission peak light spectrum can be obtained. According to the invention, the faraday anomalous dispersion effect which is realized after the inert gas and alkali metal gas are mixed is utilized, the design principle is clear, the structure is simple, the working is stable, and the laser performance is high.

The invention discloses a liquid plastic clamp for inner cutting machining of thin-wall sleeve parts and a design method, and belongs to the general technical field of machinery. The clamp is composedof a fixed base plate, a clamp base, a clamping cylinder body and a pressurization screw rod which are connected with one another. The structure is novel, the design principle is clear, the liquid ofan inner cavity enters an outer cavity through rotation of the pressurization screw rod, the total liquid amount of the outer cavity is increased, deformation is generated by the non-equal-thicknesscylindrical wall structure of the inner side of the wall of the outer cavity, the deformation is large in two sides and small in the middle when the clamp is stressed, all parts of the outer wall of aworkpiece are subjected to the same load transmitted by the non-equal-thickness cylindrical wall, so that the deflection generated by cutting of a turning tool is reduced, the workpiece can be clamped, the clamp can keep high in position precision requirement, and the machining precision of the workpiece is improved.

The invention relates to a method of monitoring rusting risk of reinforcement in concrete in situ. The method includes the steps of 1, according to the principle of plane state of stress and stress concentration, applying prestress to rusting monitoring sensing units to enable them to be in a plane state of stress; 2, packaging three sides of each rusting monitoring sensing unit, and reserving one side as a rusting monitoring side; 3, distributing the rusting monitoring sensing units at equal intervals within a rectangular steel frame, before concreting, distributing the rectangular steel frame and the outer surface of concrete at a certain angle in an area to be subjected to reinforcement rusting monitoring, allowing the rusting monitoring sides to face a protective layer, and performing rusting monitoring through continuous strain measurement of different sectional heights of sheets. The method has the advantages that monitoring chloride threshold concentration fronts at different depths is achieved, initial rusting time of the reinforcement is predicted, results are updated according to monitoring data, the rusting monitoring sensing units as deep as the reinforcement allow the final initial rusting time, rusting rate and rusting degree of the reinforcement to be directly monitored.

The invention discloses a backup method of impregnation control software, and belongs to the technical field of textile software application. The software comprises an external module and an internalmodule; the external module is composed of a USB interface; the internal module is composed of an analysis module, a comparison module, a judgment module and a statistics module which are connected with one another. According to the method, the design principle is clear, programs and parameters in a PLC, a frequency converter and a touch screen can be effectively maintained, faults can be found conveniently, the technical transformation of an impregnator is facilitated, factory personnel do not need to conduct replacement during maintenance, the faults can be automatically and quickly solved,the processing schedule is not affected, and the processing efficiency can be ensured.

The invention discloses an integrated atomic beam type optical frequency marker. The optical frequency standard includes an electrical cabinet and an optical cabinet; the electrical cabinet includes control, measurement and display equipment; the electrical cabinet supplies power to each device in the optical cabinet, and outputs control signals and frequency locking signals to the optical cabinet; the optical cabinet It includes an atomic beam tube, a laser and an ultra-stable laser system; the optical cabinet outputs ultra-stable resonant cavity signals and atomic spectrum signals to the electrical cabinet; the atomic beam tube is an integrated calcium atom beam sealed tube; the laser includes a 423nm Laser and 657nm laser. The design of this optical frequency standard avoids the problems of many lasers and complex systems faced by other optical frequency standard systems, and is expected to become the first commercial time-keeping optical frequency standard that can run continuously. The optical frequency standard of the invention has a clear design principle, is scientific and can be realized by engineering, and is a cutting-edge innovative design in the field of optical frequency standard.

The invention discloses a first sliding and then hinged support and a connection method. Firstly, a lower structure is implemented and completed, an embedded part is reserved in the lower structure, the bottom of a sliding support is fixed on the lower structure through the embedded part, an upper structure is connected to the top of the sliding support, and after the upper structure is implemented and completed and horizontal force is released, and deformation becomes stable, a limiting device is added to limit movement of the sliding support, so that the limited sliding support only rotatesin an axial direction, thereby changing the sliding support to a hinged support. According to the support and the method, the requirement of mutual sliding of a connecting part under the complex stress condition in an implementation process is firstly met, and horizontal force and deformation of mutual action of the connecting part are released. During subsequent use, the stability of the structure can be enhanced by converting the sliding support into the hinged support, mutual sliding can be limited, so that the final structure can eliminate the rigid connection damage effect in the implementation process, can further enhance stability in a use process, and the method has the characteristics of simple implementation, clear principles, strong practicability and the like.

The invention provides a self-propelled turnout which comprises a turnout, wherein the turnout is fixedly arranged on a steel platform, the lower part of the steel platform is provided with multiple support steel beams, each steel beam is provided with a retractor device, and each retractor device is connected with a road wheel. The self-propelled turnout provided by the invention solves the problem that the turnout longitudinal shift is rapid and convenient in the existing tunnel construction process, the straight line construction period of tunnel construction can not be occupied, and the operating efficiency is improved. The self-propelled turnout provided by the invention has the advantages of design principle clearness, simple structure, easiness in manufacture, convenience in operation, low cost and the like.

The invention relates to a fixed wing aircraft open-water-area ditching test apparatus which is composed of a front gantry bracket (1), a middle support (2), a rear gantry bracket (3), a tail adjusting device, a throwing-in support (4), a tackle track (5), a weight throwing-in device, a damping device, a small tackle (6), a model throwing-in control device and a speed test device. The fixed wing aircraft open-water-area ditching test apparatus has the advantages that experimental requirements for fixed wing aircraft ditching under a stagnant-water state and a wave state are met, different throwing-in attitude angles of the an aircraft model are achieved, experimental projects which cannot completed in a pool are solved, and the fixed wing aircraft open-water-area ditching test apparatus is clear in design principle, and has strong operability, namely, maintainability.

A two-way axial flow pump impeller based on oblique V symmetrical airfoil and its design method, belonging to the technical field of water conservancy engineering, the impeller is composed of blades and a hub, the diameter of the rim of the impeller is 300 mm, the ratio of the hub to the hub is 0.4667, and the number of blades is 4 , the blades are evenly distributed in the circumferential direction of the hub, the blade airfoil is an oblique V symmetrical airfoil, the center line of the unilateral airfoil is oblique V shape, the maximum thickness of the hub side airfoil is 12mm, and the maximum thickness of the rim side airfoil is 6mm, The maximum thickness of the middle airfoil section changes linearly; the design method of the impeller includes step A: bidirectional axial flow pump airfoil design; step B: bidirectional axial flow pump impeller design. The optimum point of cavitation performance of the bidirectional axial flow pump with oblique V symmetrical airfoil design adopted in the present invention is close to the point of zero-lift operating condition, and the optimum point of cavitation performance of conventional one-way pumps is close to the point of high efficiency. At the high-efficiency point, the cavitation performance of the two-way pump with inclined V airfoil reaches the level of the one-way pump.

The invention provides an optical fiber winding device for optical fiber macrobending loss measurement and an optical fiber winding method. The optical fiber winding device comprises a horizontally arranged rotating bracket and a core shaft vertically arranged at the center of the rotating bracket, and is characterized in that an end plate at one end of the rotating bracket is used for placing an optical fiber reel, the core shaft and the rotating bracket are movably connected, and the bottom end of the core shaft penetrates through the rotating bracket and is fixedly arranged; the optical fiber reel is arranged on the end plate at one end of the rotating bracket, one end of an optical fiber on the optical fiber reel is fixed on the core shaft, the rotating bracket rotates by taking the core shaft as an axis, and the optical fiber reel rotates towards a direction opposite to the rotating direction of the rotating bracket while moving along with the rotating bracket. The optical fiber winding device can achieve a purpose of directly winding an optical fiber without removing the optical fiber on an optical time-domain reflectometer, avoids an attenuation error generated in optical fiber macrobending loss measurement, ensures the optical fiber not to generate torsion stress in the winding process through the overall device structure and ensures the accuracy of optical fiber macrobending loss measurement.