31results about How to "Change the spatial distribution" patented technology

The invention relates to a sealing device of turbine pressurizing compressor, which comprises a middle case, a sealing ring base, a retaining oil spray disc, a retaining bearing, and an oil baffle plate between the retaining oil spray disc and the middle case. Wherein, the oil baffle plate, the middle case and the retaining bearing can form a stable sealing chamber; the oil baffle plate is mounted at the inclined surface of annular heave to limit the flowing shape of machine oil with resisting and dividing the machine oil; the case of retaining oil spray disc that connecting the oil container has a annular heave whose inner and outer sides have inclined surface to change the flowing direction; the sealing ring base has a guide groove; the guide groove and the retaining oil spray disc form a guide channel to guide the machine oil leaked from the movable sealing gap between the oil baffle plate and the retaining oil spray disc into the oil reflux cut of middle case. The invention can effectively reduce the oil leakage with wider market prospect.

The invention discloses a kernel rotor device of an exhaust-gas turbocharger, comprising a middle casing, a thrust sleeve, a thrust bearing, an oil baffle, and a shaft gland, wherein a blade wheel is arranged on a turbine shaft on one end of the shaft gland, the middle casing on the one end of the blade wheel is provided with a chamber, a sealing ring sleeve base is arranged in the chamber, and the sealing ring sleeve base comprises a ring-shaped component which is sealed with the inner walls of the chamber and a lantern ring which is dynamically sealed by the shaft gland and is arranged on the turbine shaft. A ring-shaped connecting member is fixedly connected between the ring-shaped component and the lantern ring, one lateral side of the ring-shaped connecting member which faces the blade wheel is provided with an arc-shaped end face which is relative to the shape of the blade wheel. The original connection between a linking disk and the middle casing is changed into the connection of the middle casing and the sealing ring sleeve to remove the linking disk with large size, thereby avoiding deformation of the product. The original projection sealing is changed into notch sealing to enlarge the oil return space of the product, and the original screw pressing is changed into a circlip pressing, thereby providing conveniences for assembly, easily adopting an automatic assembly line, and reducing the cost of the product.

The invention discloses a speckle restraining device for a laser light source based on an MEMS (micro-electromechanical systems) technology, relating to the technical field of laser display. The speckle restraining device can be used for solving the problems of poor speckle elimination effect, complex realization structure, high possibility of damaging, high cost and the like of the existing speckle elimination method. The speckle restrain device comprises a planar optical waveguide shunt and a converging lens, wherein the planar optical waveguide shunt is obtained by processing on a glass substrate by the MEMS processing technique; the converging lens is arranged on the output waveguide side of the planar optical waveguide shunt and is used for gathering light beams output by the planar optical waveguide shunt; the planar optical waveguide shunt is of a 1*N structure, wherein N is more than or equal to 2; and each output waveguide of the planar optical waveguide shunt is respectively integrated with a phase modulation device. The speckle restraining device has the advantages of simple structure, mature processing technique, low construction cost, high integration level, good speckle elimination effect and stable performance, and is easy to implement.

The invention belongs to the field of miniaturized total analysis systems and fluid micro-mixing and relates to a passive convergence-diffusion micro-mixer for fluids with low diffusion coefficient. The micro-mixer is composed of a fluid inlet channel, a fluid mixing channel and a fluid outlet channel; polygonal structural units are repeatedly arranged in the fluid mixing channel; the polygonal structural units are arranged in a staggered form, so that a convergence-diffusion chamber structure is formed on tooth-shaped edges of the polygonal structural units and a mixing chamber structure is formed on the top ends of the polygonal structural units; the convergence-diffusion chamber structure is capable of inducing the fluid to change periodically, so as to form a convergence-diffusion flowvariable; convergence-diffusion effect and sharp corner effect of the mixing chamber structure are utilized to induce the fluid to generate other various mixing mechanisms except for diffusion mechanism in the mixing chamber. The passive convergence-diffusion micro-mixer provided by the invention is capable of realizing fast and efficient mixing between fluids with low diffusion coefficient in awide range of reynolds number.

The invention discloses a device for restraining the SBS effect in the amplification stage of an MOPA structure high-power narrow-linewidth fiber laser device. The device comprises pumping sources, coupling devices and a gain fiber, wherein the pumping sources are coupled into the gain fiber through the coupling devices at different positions of the gain fiber, and then spatial multipoint pumping is realized. The change of the number and spatial distribution of the pumping sources can affect the spatial distribution of the number of inverted population in gain media so as to affect the process of amplification of amplifier signal light and SBS scattered light, through reasonable design of the position and power of a pumping point, amplification of SBS scattered light can be weakened on the premise that the power of an amplifier is guaranteed, the SBS effect of the amplifier can be effectively restrained, and the output power of the narrow-linewidth fiber laser device can be improved.

The invention discloses a light-emitting diode (LED) package. The LED package comprises an LED bracket which comprises a lower surface, two side surfaces and two upper surfaces, an LED chip which is arranged above the lower surface of the LED bracket and packaging glue which coats the LED bracket and the LED chip. The LED package has asymmetrical light-emitting distribution. The invention also discloses a backlight module. A light-emitting source, namely the LED package has asymmetrical light-emitting action, and two groups of antisymmetrical light-emitting sources are alternately and repeatedly arranged, so that the spatial distribution of backlight lighting can be changed, and the conventional phenomenon of low brightness at a large visual angle can be effectively modified.

The invention relates to a fuel classification device, an engine combustion chamber and an aero-engine. The fuel classification device comprises a pre-combustion stage provided with a pre-combustion stage oil channel (2) for supplying oil into a flame tube and a two main combustion stage provided with at least two main combustion stage oil channels for supplying oil to a flame tube. When an engineworks in the first state, the pre-combustion stage oil channel (2) and all the main combustion stage oil channels are opened for oil supply. When oscillating combustion occurs in the first state, theoil supply ratio of the main combustion stage oil channels is adjusted while the total oil supply of the main combustion stage oil channels are kept unchanged. According to the fuel classification device, local combustion in the flame tube can occur under the condition of rich oil by independently adjusting the fuel distribution ratio in the main combustion stage, so that oscillating combustion is prevented. Besides, spatial distribution of fuel in the flame tube can be uniform, the emission level is controlled, and thus, better outlet temperature distribution quality is maintained.

The invention relates to a translation invariant wavelet remote sensing image restoration method in combination with reciprocal cells. According to the transfer function model of the imaging system, the advantages of shift invariance and capability of multidirectional resolution of the translation invariant wavelet are fully utilized, aliasing items are considered into the image restoration model, and noise and fuzz are used as the factors for causing image deterioration, thereby achieving the restoration results of removing aliasing in frequency domain and removing white noise and fuzz in a time-frequency domain. in the method, the quality of the restored image is greatly enhanced, image repetition feature is perfect and the image restoration efficiency is enhanced.

The invention discloses a touch screen, a touch screen manufacturing method and a display device. Positioning sensitivity of touch points of the touch screen can be improved. The touch screen comprises a substrate, a plurality of first electrode assemblies, a plurality of second electrode assemblies and an insulating sealed cavity, the first electrode assemblies are positioned on the substrate and distributed along a first direction and comprise first electrodes and second electrodes arranged on different layers, the second electrode assemblies are positioned on the substrate and distributed along a second direction intersected with the first direction and comprise third electrodes and fourth electrodes, a hollow stereoscopic area is enclosed by the first electrodes, the second electrodes, the third electrodes and the fourth electrodes at the intersections of the first electrode assemblies and the second electrode assemblies, and the cavity is positioned in the hollow stereoscopic area and contain magnetic materials.

A method to control tissue / device heating at implantable medical devices including neuroprosthetic devices. In a first embodiment, thermal conductivity of components of the implantable medical devices including the neuroprosthetic devices is increased. In a second embodiment, the implantable medical devices including the neuroprosthetic devices are cooled by using heat-sinks. In a third embodiment, portions of the implantable medical devices including the neuroprosthetic devices are replaced with specific thermal properties. In a fourth embodiment, the implantable medical devices including the neuroprosthetic devices are coated with a drug / material that will induce surrounding tissue to become more resistant to temperature increases. In a fifth embodiment, the temperature increase near the implantable devices including the neuroprosthetic devices is determined using a modified bio-heat transfer model. In a sixth embodiment, the shape of the outer or the inner surface of the device is modified.

The invention provides a Mini LED backlight source. The Mini LED backlight source comprises at least one substrate, wherein a plurality of welding areas are arranged on the surface of the substrate, and a light reflecting layer is arranged on the portion outside the welding areas. at least one flip LED chip, wherein afirst electrode and a second electrode are arranged at the bottom of the flip LED chip, and the flip LED chip is arranged on the welding area of the substrate; a plurality of metal connecting layers which are used for connecting the electrodes of the flip LED chips and the welding area of the substrate, and are arranged between the substrate and the flip LED chips; a packaging layer which covers the LED flip chips, the welding area of the substrate, the metal connecting layer and a part of the reflective layer around the flip LED chip; at least one IC driver and at least one component; and a microstructure on the surfacecombined with the packaging layerof the reflective layer. The invention further provides a Mini LED backlight module and a preparation method of the Mini LED backlight source. The LED device increases light emitting of the side face of the LED through light refraction, the light emitting angle of the light source is increased, and the light emitting effect is improved.

The invention relates to a translation invariant wavelet remote sensing image restoration method in combination with reciprocal cells. According to the transfer function model of the imaging system, the advantages of shift invariance and capability of multidirectional resolution of the translation invariant wavelet are fully utilized, aliasing items are considered into the image restoration model, and noise and fuzz are used as the factors for causing image deterioration, thereby achieving the restoration results of removing aliasing in frequency domain and removing white noise and fuzz in a time-frequency domain. in the method, the quality of the restored image is greatly enhanced, image repetition feature is perfect and the image restoration efficiency is enhanced.

The invention discloses a neutron ghost imager. The ghost imager comprises a neutron source, a magnet structure, least one neutron sensor, and imaging devices. The neutron source is used for generating a neutron beam. The magnet structure is arranged towards the emission direction of the neutron beam, and is used for spatially modulating the neutron beam and irradiating the modulated neutron beamto the surface of a to-be-imaged object. The neutron sensor is arranged in parallel with the to-be-imaged object, and is used for receiving a neutron beam passing through the to-be-imaged object. Theimaging devices are respectively connected with the magnet structure and the neutron sensor, and are used for reconstructing the to-be-imaged object according to the received neutron beam and a magnetic polarization direction distribution function at irradiation of the received neutron beam in the magnet structure, or reconstructing the to-be-imaged object according to the received neutron beam and the magnetic polarization direction distribution function of the neutron beam after spatial modulation. According to the neutron ghost imager, the purpose of the invention can be achieved with onlyone or more neutron sensors and without focusing imaging on the neutron beam and a neutron sensor array; and the structure is simple, the size is small, and the cost is low.

The invention discloses a welding seam forming regulation and control method based on space arc-shaped track electric arc swing coupling welding parameter follow-up. A system adopted by the method comprises a swing controller (1), a three-axis linear motion mechanism (2), a welding seam penetration current selector (3), a welding seam control type current selector (4), a welding gun (5) and a welding power source (6), and the swing controller (1) is used for driving the three-axis linear motion mechanism (2) to drive the welding gun (5) to conduct swing welding in a spatial arc track. When the welding gun (5) swings to different areas of the center of the welding seam, the welding power source (6) synchronously outputs different welding currents, and welding seam forming regulation and control are completed through the method that space arc-shaped track electric arc swing is coupled with welding parameter follow-up. According to the method, heat input of a welding area and flow field distribution of a molten pool can be effectively regulated and controlled, welding defects such as incomplete fusion, incomplete penetration and undercut of welding are eliminated, and excellent welding seam forming and welding seam quality are obtained.

The invention relates to a sealing device of turbine pressurizing compressor, which comprises a middle case, a sealing ring base, a retaining oil spray disc, a retaining bearing, and an oil baffle plate between the retaining oil spray disc and the middle case. Wherein, the oil baffle plate, the middle case and the retaining bearing can form a stable sealing chamber; the oil baffle plate is mounted at the inclined surface of annular heave to limit the flowing shape of machine oil with resisting and dividing the machine oil; the case of retaining oil spray disc that connecting the oil container has a annular heave whose inner and outer sides have inclined surface to change the flowing direction; the sealing ring base has a guide groove; the guide groove and the retaining oil spray disc form a guide channel to guide the machine oil leaked from the movable sealing gap between the oil baffle plate and the retaining oil spray disc into the oil reflux cut of middle case. The invention can effectively reduce the oil leakage with wider market prospect.

The invention discloses a SBS effect suppressing device in the amplifier stage of a high-power narrow-linewidth fiber laser with MOPA structure, including a pump source, a coupling device and a gain fiber, and the pump source is coupled into the gain fiber through coupling devices at different positions of the gain fiber , that is, spatial multipoint pumping. Changes in the number and spatial distribution of pump sources will affect the spatial distribution of the number of inversion particles in the gain medium, which will further affect the amplification process of the signal light and SBS scattered light of the amplifier. By rationally designing the position and power of the pumping point, the efficiency of the amplifier can be guaranteed. At the same time, the amplification of SBS scattered light is weakened, the SBS effect of the amplifier is effectively suppressed, and the output power of the narrow linewidth fiber laser is increased.

The invention discloses an MEMS piezoelectric resonator capable of adjusting frequency based on a resonator through hole, which belongs to the technical field of electronic science and comprises: a resonator vibration block, wherein the resonator vibration block comprises a monocrystalline silicon layer, an aluminum nitride piezoelectric layer covering the surface of one side of the monocrystalline silicon layer, and a plurality of through holes which are located at the two ends of the resonance body vibration block and penetrate through the monocrystalline silicon layer and the aluminum nitride piezoelectric layer. and two supporting tables, wherein each supporting table is connected to the side face of the resonance body vibration block in the length direction through a supporting beam,and the supporting tables and the supporting beams are covered with aluminum nitride piezoelectric layers. The aluminum nitride piezoelectric layers on the resonator vibration block are electrically connected with the aluminum nitride piezoelectric layers on the corresponding supporting tables through the aluminum nitride piezoelectric layers on the supporting beam.

The invention provides an insulated anode cathode arc thruster with an auxiliary floating potential electrode, comprising a cathode (1), an auxiliary floating potential electrode (2), an insulating sleeve (3), an insulating anode (4) and an anode insulating layer (5 ); the insulating anode (4) is set on the insulating sleeve (3), and the surface of the insulating anode (4) is wrapped by the anode insulating layer (5); the insulating sleeve (3) is set on the cathode (1), and the cathode The surface of (1) is in close contact with the inner wall of the insulating sleeve (3); the auxiliary floating potential electrode (2) is located inside the insulating sleeve (3), and is in close contact with the inner wall of the insulating sleeve (3), increasing the The cathode current amplitude, the density of the plasma source is high, and the plasma source forms a directional jet, which improves the efficiency of the cathode arc thruster. The invention reduces the radial divergence of the jet plasma without affecting the plasma generation , so that more plasma is directional ejected along the insulating sleeve (3) to form a thrust, which greatly improves the propulsion capability of the cathode arc thruster.

The invention relates to a copolymerized polymer chelating flocculant and a preparation method thereof. It uses polyethylene polyamine and piperazine as raw materials, and introduces polyethylene polyamine containing active amino groups and piperazine ring with rigid structure into the polymer chain through epichlorohydrin under mild conditions , and then react with carbon disulfide and sodium hydroxide to insert the strong chelating group dithioformate into the molecular chain. The present invention introduces a rigid piperazine ring structure into the polymer chain, which effectively changes the molecular chain structure and the spatial distribution of the chelating group, thereby facilitating the coordination of the chelating group and the heavy metal ion, as well as the formation and The growth makes the flocs produced dense and coarse, which improves the chelation and flocculation ability of heavy metals and the separation performance of flocs. The method of the invention has simple technological process, mild technological control conditions, and is easy to control and realize; and the whole technological process is environmentally friendly, and has good popularization and application value.

The invention discloses an experimental device and method for simulating water curtain water seal effects under different engineering geological conditions. The experimental device comprises a geological layer model, a water supply device and a data acquisition device. The geologic layer model includes a water tank; a cavern and an underground water simulation device are arranged at the bottom inthe water tank; and the water tank is filled with a simulated geologic layer material, wherein the geologic layer material and a simulated object material meet similar conditions. The underground water simulation device includes a water curtain pipeline arranged around the cavern; a water permeable holes are formed in the water curtain pipeline; a water curtain pipeline water inlet is communicatedwith a water supply device; a waterproof layer and a drainage structure are arranged at the bottom of a valve cavity arranged between the water supply device and the water curtain pipeline inlet; anda flow meter is arranged at the outlet of the drainage structure. A distributed fiber sensor, a stress and strain sensor and the flow meter are connected with a data acquisition center. According tothe invention, simulated data close to the reality are provided for analyzing the water curtain water seal effects under different engineering geological conditions and thus a reference design is provided for the engineering.

The invention relates to a fuel classification device, an engine combustion chamber and an aero-engine, wherein the fuel classification device comprises: a pre-combustion stage, which is provided with a pre-combustion stage oil passage (2) for supplying fuel to the flame tube; and a main combustion stage stage, with at least two main fuel oil circuits for supplying oil to the flame tube; wherein, when the engine is working in the first state, the pre-combustion stage oil circuit (2) and each main fuel stage oil circuit are open Fuel supply: when oscillating combustion occurs in the first state, the fuel supply ratio of each main fuel stage oil circuit is adjusted while keeping the total fuel supply volume of each main fuel stage oil circuit unchanged. This kind of fuel oil classification device can make the local combustion in the flame tube occur under the rich fuel condition by separately adjusting the fuel oil distribution ratio inside the main combustion stage, so as to avoid oscillation combustion; at the same time, it can make the fuel space distribution in the flame tube more uniform It is beneficial to control the discharge level, so as to maintain a good outlet temperature distribution quality.

The invention discloses a core rotor device of an exhaust gas turbocharger, which comprises an intermediate shell, a thrust sleeve, a thrust bearing, an oil baffle, and a shaft seal. It has a chamber, and a sealing ring seat is arranged in the chamber, and the sealing ring seat includes a ring member sealed with the inner wall of the chamber, and a ring for dynamic sealing with the shaft seal arranged on the turbine shaft, the ring member, the sleeve The rings are fixedly connected with a ring-shaped connecting piece, and the side of the ring-shaped connecting piece facing the impeller has an arc-shaped end face corresponding to the shape of the impeller. The original connecting disc and the middle shell are changed into the middle shell and the sealing ring sleeve. The larger connecting plate is canceled to avoid product deformation, the original convex seal is changed to groove seal, the oil return space of the product is increased, and the screw compression is changed to the elastic retaining ring compression. The above measures The assembly is convenient, the automatic assembly line is easy to adopt, and the product cost is reduced.

The invention relates to a method for improving the compaction density of lithium iron phosphate by mechanical pressurization, which comprises the following steps: 01, uniformly mixing raw materials for preparing lithium iron phosphate, and drying to obtain a precursor material; 02, calcining the precursor material in a protective atmosphere to obtain lithium iron phosphate; and 03, putting the lithium iron phosphate into a tablet press, compacting by adopting a segmented pressure maintaining mode, and carrying out particle crushing to obtain the lithium iron phosphate with high compaction density. The method has the beneficial effects that the space distribution of the lithium iron phosphate is changed through a mechanical pressurization method, so that the compaction density of the lithium iron phosphate is improved, the volume energy density of the lithium iron phosphate is further improved, the adopted method has no special steps, the production process is simple and easy to operate, the batch one-time preparation is good, and large-scale preparation can be realized.

The invention discloses a high-speed electromagnetic polishing device for complex curved surfaces with small and medium calibers. The device includes a sealed container composed of a container body and an upper cover. An object stage is installed in the container body for placing optical elements to be polished; the upper cover It is conformal to the surface to be polished and has a gap; the sealed container is provided with a magnetorheological fluid circulation port, which is connected to the magnetorheological fluid circulation pipeline; the sealed container is filled with magnetorheological fluid; it is used for a controllable magnetic field generating device A position-variable electromagnetic field is generated at the upper cover, so that the magnetorheological fluid between the upper cover and the surface to be polished at the position where the electromagnetic field is generated forms a Birmingham body as a flexible grinding head; by controlling the position change of the electromagnetic field, the flexible grinding head Polish optics by sliding across the surface to be polished. The invention can effectively and quickly polish the complex curved surface with small and medium calibers, thereby effectively shortening the time of the optical modification stage and improving the optical processing efficiency.

The invention discloses an upper movable arm for a working device of a multifunctional demolition robot and a processing method thereof. The box structure of the upper movable arm includes a U-shaped plate and a bottom plate, the opening of the U-shaped plate is downward, and the two side ends It is welded with the bottom plate to form the box structure of the upper boom, the two ends of the box structure of the upper boom are welded with baffle plates, the side surface of the U-shaped plate is welded with a reinforcement plate, and the outer surface of the reinforcement plate is welded with a fork plate, and the fork plate is simultaneously connected with the Baffle welding. The profile structure of the upper boom of the invention is easy to be welded and formed, the processing technology is simple, the stress concentration is reduced, and the side plate of the upper boom will not be cracked due to the stress concentration. The deformation of the upper boom after welding is small, and its strength and rigidity are strengthened.

The invention discloses a touch screen, a touch screen manufacturing method and a display device. Positioning sensitivity of touch points of the touch screen can be improved. The touch screen comprises a substrate, a plurality of first electrode assemblies, a plurality of second electrode assemblies and an insulating sealed cavity, the first electrode assemblies are positioned on the substrate and distributed along a first direction and comprise first electrodes and second electrodes arranged on different layers, the second electrode assemblies are positioned on the substrate and distributed along a second direction intersected with the first direction and comprise third electrodes and fourth electrodes, a hollow stereoscopic area is enclosed by the first electrodes, the second electrodes, the third electrodes and the fourth electrodes at the intersections of the first electrode assemblies and the second electrode assemblies, and the cavity is positioned in the hollow stereoscopic area and contain magnetic materials.

The invention discloses a front case assembly, a TV set and an assembling method thereof. The supporting frame includes a supporting bottom plate, a supporting side plate and a supporting top plate, the supporting top plate is vertically connected to one side of the supporting side plate, and the supporting The bottom plate and the supporting side plate are connected to the side away from the supporting top plate, the supporting bottom plate and the supporting top plate are located on the same side of the supporting side plate, the supporting bottom plate is used to connect the middle shell assembly, and the supporting top plate is used for In connection with the rear case assembly, the supporting bottom plate is used for placing each preset component, so that a preset accommodating space is formed inside the front case assembly for placing each preset component in the TV set. By changing the overall structure of the front case assembly, the present invention changes the positional relationship between the front case assembly and each preset part in the TV, and changes the spatial distribution of each preset part, so that the front case assembly reduces the number of times when the TV is assembled. The overall thickness of the TV can realize the wall hanging of the TV.

The invention belongs to the field of micro-total analysis system, fluid micro-mixing and related fields, and relates to a passive convergent-divergent micro-mixer for low diffusion coefficient fluid. The micro-mixer consists of a fluid inlet channel, a fluid mixing channel, and a fluid outlet channel Composition, and repeated polygonal structural units in the fluid mixing channel, the polygonal structural units are staggered to form a convergent-divergent cavity structure between the toothed sides of the polygonal structural unit and a mixing chamber at the top of the polygonal structural unit body structure. The convergent-divergent cavity structure induces the fluid to undergo periodic changes, forming a convergent-divergent flow change. Through the convergent-divergent effect and the sharp angle effect of the mixing cavity structure, the fluid is induced to produce multiple mechanisms other than the diffusion mechanism in the mixing cavity. a mixing mechanism. The invention can realize rapid and efficient mixing between fluids with low diffusion coefficients in a wide range of Reynolds numbers.

The invention relates to a copolymerization high-molecular chelating flocculating agent and a preparation method thereof. According to the invention, polyethylene polyamine and piperazine are taken asraw materials, under mild condition, polyethylene polyamine containing an active amino group and piperazine ring having a rigid structure are introduced into a high-molecular chain through chloropropylene oxide, and then the material is reacted with carbon disulfide and sodium hydroxide for inoculating a strong chelation group disulfo formyl group in the molecular chain. The rigid piperazine ringis introduced into the high-molecular chain, the molecular chain structure and the spatial distribution of the chelation group can be effectively changed, the introduction of the rigid piperazine ring in the high-molecular chain is in favor of coordination of the chelation group and heavy metal ions, and in favor of floc formation and growth, the generated floc is compact and large, the chelatingflocculation capability on the heavy metal and floc separating performance are increased. The method has the advantages of simple process flow, mild technology control condition, and easy control andrealization, and the whole process is environmentally friendly, and has good popularization application value.

The invention discloses a neutron ghost imager, comprising: a neutron source, used to generate a neutron beam; a magnet structure, arranged toward the emission direction of the neutron beam, used for space modulation of the neutron beam, and the modulated The final neutron beam is irradiated to the surface of the object to be imaged; at least one neutron sensor is arranged in parallel with the object to be imaged, and is used to receive the neutron beam passing through the object to be imaged; the imaging device is connected to the magnet structure and the neutron sensor respectively, It is used to reconstruct the object to be imaged according to the received neutron beam and the distribution function of the magnetic polarization direction of the neutron beam irradiation place in the magnet structure, or according to the received neutron beam and the magnetic polarization direction of the neutron beam after space modulation The distribution function reconstructs the object to be imaged. It only needs one or more neutron sensors, does not need to focus and image neutron beams, and can achieve the purpose of the invention without neutron sensor arrays, and has simple structure, small size and low cost.