36 results about "Flattop" patented technology

The invention discloses a construction method for excavating a station structure by a tunnel-first and station-later pipe roof hole pile method. During construction, four pilot tunnels are arranged onan upper layer and a lower layer respectively, one advanced pilot tunnel is arranged in the upper-layer pilot tunnels, the advanced pilot tunnel is used as a working space for pipe roof piling, and no pipe roof support is arranged above the advanced pilot tunnel and the four lower pilot tunnels; a primary support is arranged and is of a vault straight wall structure, the pilot tunnels serve as working spaces of side piles and middle column steel pipe columns, and after the pipe roof piling is completed, the other three upper pilot tunnels on the upper layer are excavated through a flat-top straight wall structure. The construction method is also suitable for excavation of shallow-buried and deep-buried stations, ensures that environmental facilities are hardly influenced, further saves economic cost, has extremely high economic benefits and social value, and can be widely applied to similar projects.

The invention provides a subwavelength antireflective structure device and a manufacturing method of the subwavelength antireflective structure device. The subwavelength antireflective structure device comprises a flat-top subwavelength antireflective structure, and the flat-top subwavelength antireflective structure comprises a substrate and a flat-top surface microstructure etched on the substrate; the subwavelength antireflective structure device further comprises a non-flat-top structure, obtained in an oblique incidence depositional mode, above the flat-top surface microstructure; the non-flat-top structure and the substrate are made of the same material. Compared with the prior art, the subwavelength antireflective structure device can enhance the antireflective effect of a flat-top subwavelength antireflective structure in the prior art.

This disclosure provides a device for heating to generate a uniform molten pool, including: a source unit for generating an energy beam; a beam expanding/reducing unit positioned in an energy path of the energy beam for adjusting the diameter of the energy beam; a flat-top conical lens set positioned in the energy path and including at least two flat-top axicons, with the beam expanding/reducing unit positioned between the source unit and the flat-top conical lens set; and a focusing lens positioned in the energy path, with the flat-top conical lens set between the beam expanding/reducing unit and the focusing lens, and the energy beam being focused by the focusing lens. This disclosure generates a uniform molten pool to prevent vaporization splash due to overheating of the material during melting.

The invention discloses a circuit and a method for generating a flat-topped pulsed magnetic field, and belongs to the technical field of high-intensity magnetic fields. The circuit comprises a main loop and a magnetic control loop. The main loop comprises a first capacitor, a first switch, a double-winding magnetically controlled reactor and a pulse magnet which are sequentially connected in series. The double-winding magnetically controlled reactor in the main loop comprises a first winding and a second winding which are connected in series, and the first winding and the second winding are the same in number of turns and opposite in winding direction. The magnetic control loop comprises a second capacitor, a second switch and an electric reactor which are sequentially connected in series and is connected to the two ends of a second winding of the magnetic control electric reactor. The main loop further comprises a follow current loop connected to the two ends of the first capacitor in parallel. The follow current loop comprises a resistor and a one-way conduction element which are connected to the two ends of the first capacitor. The flat-topped pulsed magnetic field is generated by regulating and controlling the inductance of the double-winding magnetically controlled reactor, and the flat-topped pulsed magnetic field generating device has the characteristics of simple circuit structure, reliable control, low manufacturing cost, high field intensity of the generated flat-topped pulsed magnetic field, good stability and the like.

The invention provides a laser spot shaping device and a method for preparing a single cladding layer. The method comprises the following steps that laser technological parameters are set, the a laserbeam is bunched through the laser spot shaping device, and the laser beam is shaped into a flat-top light spot with a certain shape and size; and a base body is preheated at a certain temperature before cladding, then a WC ceramic particle reinforced phase with a certain ratio is added into cladding powder, cladding is carried out by adopting a mode of single-layer multi-channel overlapping and synchronous powder feeding, finally remelting treatment is carried out after cladding is finished, and a sample is taken out and treated in an air cooling mode. The method for preparing a single cladding layer has the advantages of simple structure and low manufacturing cost. The cladding layer with high thickness, high hardness and low crack generation rate can be prepared by the method, and the cladding layer has the advantages of high bonding strength, short preparation time, high efficiency, uniform heating, smooth surface, few cladding defects and the like.

The invention discloses a permanent support device for monitoring displacement of a flat top guiding hole top plate. The permanent support device comprises a bearing base, a bearing column, a guidingscrew rod, a bearing screw sleeve, a supporting plate, a sheath pipe, a control room, a traction pull rope, a pressure sensor and a control circuit. The upper end surface of the bearing base is connected with the bearing column. The upper end surface of the bearing column is connected with the guiding screw rod through a positioning mechanism. The bearing screw sleeve is in meshing connection withthe guiding screw rod. The upper end surface of the bearing screw sleeve is hinged to the lower end surface of the supporting plate. The sheath pipe is connected with the bearing column through the positioning mechanism. The lower end surface communicates with a control room. The traction pull rope and a laser transmitter are located in the sheath pipe. A support monitoring method of the permanent support device comprises the two steps of equipment assembly and support monitoring. The permanent support device is simple in system composition, flexible and convenient to install, daily operateand maintain, has little influence on site construction, and can be widely applied to guiding hole support and top plate settlement monitoring in subway station hole pile method construction.

The invention discloses a laser additive preparation method of an infinite-thickness tungsten-copper composite material. A copper substrate, copper powder and tungsten powder are used as raw materials, a laser additive system is adopted, laser adopts a mode that a plurality of beams of light are converged into flat-top light, tungsten powder and copper powder are synchronously and alternately fed by adopting the center of a cladding head to form combination in which the light coats the powder, and a tungsten-copper alloy layer and a copper layer are alternately formed on the copper substrate. In the alloying stage, the tungsten powder is sent out, copper on the surface of the pure copper is melted, and the tungsten powder is alloyed to form the tungsten-copper alloy layer; and in the copper layer cladding stage, only copper powder is sent out, and copper cladding is carried out on the tungsten-copper alloying layer line by line, so that a copper deposition layer is formed. According to the laser additive preparation method, the laser cladding technology and the laser alloying technology are organically combined, the tungsten-copper density difference is changed into the advantage, and the hysteresis effect of a static magnetic field inhibits movement of tungsten particles in a molten pool; and the tungsten-copper composite layer prepared through laser additive manufacturing can achieve manufacturing of large-size components through multi-layer accumulation.

The invention relates to an inverted grouting method suitable for flat-top cave roof rock mass anchoring engineering. The inverted grouting method comprises the steps that in the anchor rod mounting process, a plurality of grouting pipes extending into drill holes by different lengths are buried, then a multi-time grading grouting and hole bottom grout returning method is adopted, through multi-time grouting, the gravity problem in the vertical grouting process from bottom to top is solved, the grout filling compactness is ensured, and the grouting quality of the anchoring engineering is effectively improved. The inverted grouting method breaks through the limitation of a traditional grouting method of stone cultural relic protection anchoring engineering, can be used for anchoring grouting in different directions and at different angles, provides a new grouting method for flat-top cave roof cracking rock mass anchoring engineering, and also provides a new thought for research and engineering application in the field of geotechnical engineering.

The invention provides a VCSEL array, a manufacturing method thereof, a flat-top far-field generation method and a lighting module. Compared with a traditional VCSEL array, the VCSEL array of the invention can easily achieve a uniform flat-topped far field without arranging optical elements such as a diffuser, so that the cost of the array and the corresponding module is remarkably reduced while the requirements of TOF measurement and the like are well met. The elimination of the diffuser makes a corresponding sidewall column, a diffuser cover and other components omitted, so the thickness ofthe module is obviously reduced, and the module has multiple advantages which do not exist in the prior art.

The invention relates to a laser machining method and device capable of changing the line width. The laser machining method comprises the steps of converting a Gaussian light spot into a flat-topped light spot through a shaping module; and adjusting an included angle between the flat-topped light spot and a preset moving direction of a to-be-processed product through a control module so as to adjust the laser machining line width to adapt to different machining widths. By means of the laser machining method and device capable of changing the line width, the included angle between the flat-topped light spot and the preset moving direction can be adjusted for the different line widths, repeated laser machining is not needed, and the laser machining time is saved.

The invention discloses a digital pulse filtering method and device with self-adaptive forming time and electronic equipment, and relates to the technical field of nuclear radiation detection. The method comprises the following steps: acquiring rise time of an actual input signal; determining a time interval of adjacent incident pulses based on the rise time; on the basis of the time interval, the peak reaching time of the trapezoidal shaping filter which is randomly distributed according to the input pulse interval is independently determined for each detected X-ray signal, so that the higher pulse counting rate is realized; and based on the rise time, separately confirming the flat-top time of the trapezoidal shaping filter for each detected X-ray pulse signal, so as to compensate for the ballistic loss effect based on the flat-top time. The method is adaptive to the flattop time of the trapezoidal filter, and the flattop time of each detected X-ray is independently selected, so that higher energy resolution is realized.

The zoom system and method without mechanical moving parts are simple in structure, high in response speed, small in size, low in cost, low in liquid material selection requirement, capable of directly observing the liquid shape and large in zoom range. The system comprises a circular dielectric elastomer (3), an upper flexible electrode (4), a lower flexible electrode (5), a flat-top hollow circular truncated cone (6), transparent liquid (7), a flange part (10), a high-voltage power supply (13) and a switch (14). The periphery of the upper surface and the periphery of the lower surface of the circular dielectric elastomer are coated with an annular upper flexible electrode and an annular lower flexible electrode respectively, the inner circle radius of the annular structure is b, the width of the annular structure is a, the inner diameter of the flat-top hollow circular truncated cone is b, and the axis of the flat-top hollow circular truncated cone passes through the center of the annular structure. The flat-top hollow circular truncated cone is filled with liquid and is in contact with the flange part; and the upper flexible electrode, the lower flexible electrode, the switch and the high-voltage power supply are connected in series.

The invention discloses an air layer coupling etalon which comprises more than two single-cavity etalon bodies with the same free spectral range, fineness and transmission peak, the single-cavity etalon bodies are sequentially attached and fixed together, and every two adjacent single-cavity etalon bodies are coupled through an air layer. The double-cavity, three-cavity or multi-cavity etalon hasthe advantages of low sensitivity (the spectrum changes along with the thickness of the coupled air layer), easiness in processing and mass production, small size, low cost and the like besides high fineness and transmission peak height flat top type of the corresponding double-cavity, three-cavity or multi-cavity etalon in the prior art.

The invention discloses a reflector antenna assembly with a flat-top directional diagram, the front surface of a reflector antenna is a reflector, the reflector is a paraboloid, and the paraboloid comprises a central reflection area and an edge reflection area; the central reflection area is circular, the edge reflection area is annular, and the inner periphery of the edge reflection area is connected with the outer periphery of the central reflection area; the connecting edge of the central reflection area and the edge reflection area has a depth difference, and the depth difference is used for enabling the reflection surface to form a wave beam with a flat-top directional diagram; the antenna assembly can be formed through a small number of parts, the complexity of the antenna assembly and the debugging difficulty of the antenna assembly can be reduced, the reflecting surface of the paraboloid-shaped reflecting surface antenna is divided into the central reflecting area and the edge reflecting area, the surface of the central reflecting area and the surface of the edge reflecting area have the depth difference, a wave beam with a flat-topped pattern characteristic can be formed through the reflector antenna, and multiple satellites can be tracked at the same time.

The present invention concerns a combustion reactor (300) for chemical looping combustion (CLC) configured to operate in a fluidised bed, comprising:

• • a lower chamber (320) forming a first reaction zone for the combustion of a hydrocarbon feedstock in the presence of particles of an oxidation-reduction active mass, comprising a first side wall and being configured to include a dense fluidised bed;
  • an elongate upper chamber (340) with smaller passage cross-section than that of the lower chamber, forming a second reaction zone for the combustion of gaseous effluents originating from the combustion in the lower portion, comprising a second side wall and being configured to include a dilute fluidised bed;
  • an intermediate portion (330) connecting the two chambers, and including an inner wall forming a right angle with the side walls of the two chambers. The invention also relates to the facility and the CLC process incorporating such a reactor (300).