33results about How to "Realize continuous scanning" patented technology

The invention discloses a liquid crystal light beam deflection and scanning device. The device comprises a wedged liquid crystal box, a liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination and a quarter-wave plate, wherein a liquid crystal layer is arranged between two oppositely arranged base plates of the wedged liquid crystal box; light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and molecules on the liquid crystal layer are uniformly distributed and in parallel with the first base plate; the liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination is provided with two parallel base plates, a liquid crystal layer and liquid crystal polymers, the light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and light-alignment films with molecules pointing to the vector direction and gradually changing periodically are arranged on the sides, adjacent to the liquid crystal polymer layer of the two base plates; the quarter-wave plate is used for converting linearly polarized light into circularly polarized light. Continuous light beam deflection and scanning in a large angle range can be realized by means of the liquid crystal light beam deflection and scanning device.

The invention discloses a cloud intelligent invoice examination self-service terminal, and a cloud intelligent invoice identification and examination system and method that are based on the cloud intelligent invoice examination self-service terminal and are integrated with various technologies of the internet, cloud computing, image processing, intelligent identification, and intelligent query and the like. According to the cloud intelligent invoice examination self-service terminal, papery information of an invoice is converted into an electronic image; an internet cloud intelligent computing center carries out intelligent processing and identification on the invoice electronic image; and intelligent comparison and automatic inquiry are carried out according to corresponding contents of website inquire systems of all tax bureaus and tax bureau terminal invoice data bases to generate an authentication examination result, and the result is fed back. Therefore, the inquiry person can examine the authenticity of the invoice rapidly, simply, conveniently, and accurately and the accuracy rate can reach 99.99%. Moreover, multiple invoice scanning images can be uploaded simultaneously and thus the inquiry efficiency is high. The invoice inquiry operation is simplified; the efficiency is improved; supervision of the functional department can be carried out conveniently; the illegal behaviors like the false invoice making and selling behaviors can be effectively inhibited and thus heavy losses to the State can be avoided.

The invention discloses a synchronous measurement method of a three-dimensional real-time attitude angle of a low-speed wind tunnel test model. The method applies an Optotrak optical displacement measurement system to enable the wind tunnel test model to be a rigid body and measure a rigid body euler angle, the attitude angle of the model is solved through the rigid body euler angle, and synchronous measurement of the attitude angle of the model and other signals (such as a balance signal) of wind tunnel tests is achieved. The measurement method is verified by multiple wind tunnel tests, and the accuracy, real-timeliness and synchronism meet the test requirements.

The invention discloses a compact feed network type spoof surface plasmon polariton (SSPP) panel antenna array, and relates to the technical field of antennas. The panel antenna array is composed of an SSPP power division network and a transmission type phase gradient metasurface. The SSPP power distribution network is a 1 / 2 power division network, so that the generated SSPP is transmitted according to the design direction, and the SSPP energy is transmitted according to the designed proportion. By virtue of the SSPP power division network for feeding and by virtue of the transmission type phase gradient metasurface for decoupling, the two-path compact SSPP panel antenna array is realized. Simulation and experimental verification show that the SSPP panel antenna array is 16.9dB in averagegain, 80% or above in antenna total efficiency and 93.5% in total efficiency within the frequency band of 6.7-14GHz.

The invention provides a light emission angle modulation device for three-dimensional displayer pixels and belongs to the technical field of naked eye three-dimensional display. The light emission angle modulation device for the three-dimensional displayer pixels is sequentially composed of a light source, a refractive index matching layer, a precious metal film, a liquid crystal layer and a transparent conducting layer, wherein the upper surface and the lower surface of the precious metal film are respectively of a nanometer period structure. Light and surface plasmons are effectively coupled on the surfaces of the precious metal film through the nanometer period structures, so that surface plasmon resonance is generated and only incident light at the surface plasmon resonance angle is made to permeate the precious metal film. The crystal liquid layer controls and adjusts the refractive index through electric signals to change the surface plasmon resonance angle, and therefore light emission angle modulation is conducted through the electric signals. According to the light emission angle modulation device, continuous scanning of the light-emitting direction and strength in a space can be achieved. A three-dimensional displayer composed through a pixel array can be used for simulation and recurrence of a scattering field of an object or different display images are projected at different angles, and therefore a three-dimensional image is displayed naturally and vividly.

The invention discloses a RFID omnidirectional dynamic scanning antenna system and particularly relates to a RFID omnidirectional dynamic scanning antenna system in the field of RFID antenna mechanisms. The RFID omnidirectional dynamic scanning antenna system of the invention comprises a power supply, a controller, a driving system, a RFID directional antenna, a RFID read and write module, a rotating motion transmission mechanism, a reciprocating swing transmission mechanism, an antenna base, an antenna rotating seat and an antenna fixation support; the controller is connected with the drivingsystem; the controller is connected with a data communication port of the RFID read and write module; an output terminal of the rotating motion transmission mechanism is connected with the antenna rotating seat ; the RFID directional antenna is installed on the antenna fixation support. The RFID omnidirectional dynamic scanning antenna system has high gain, long coverage distance, wide coverage range, and can effectively eliminate blind area of coverage and significantly reduce the number of antennas.

The invention discloses a leaky-wave antenna with a step impedance composite left-right-hand structure. The leaky-wave antenna comprises a dielectric substrate, a step impedance radiation array arranged on the dielectric substrate, two microstrip feeders and two transitions, wherein the back of the dielectric substrate is provided with a metal layer which is a grounding surface of the antenna; thetransitions connect the microstrip feeders and the step impedance radiation array; the step impedance radiation array is composed of multiple radiation units with the same shape and size; the radiation units are arranged in parallel at equal intervals, the adjacent radiation units are provided with electromagnetic field coupling therebetween but not directly connected through a conductor; and metallized via holes are located at the central positions of rectangular patches and connect from the top surface of the dielectric substrate to the metal layer at the bottom surface. The miniaturizationof the leaky-wave antenna is realized. Meanwhile, the radiation efficiency is improved, the radiation stopband is improved, and continuous scanning from forward to backward is achieved.

The invention provides a broadband infrared scanning beam split device and a calibrating method. The device comprises an LVF, a clamp, a drive motor, a photoelectric switch, a zero position opening, an external pressing ring and an internal pressing ring. The drive motor drives the clamp with a gradual optical filter to conduct rotating scanning test, the internal pressing ring and the external pressing ring of the clamp press the non-working region of the LVF to conduct fixing, assembly is simple and firm, and the high-speed rotating scanning test can be achieved. Compared with a CVF, by the adoption of the scheme, the coating technology difficulty and coating cost are lowered greatly, and through a corresponding wavelength calibrating algorithm, continuous test of broadband infrared radiation can be achieved.

The invention discloses a dual-beam frequency scanning leaky-wave antenna. The dual-beam frequency scanning leaky-wave antenna is composed of a dielectric substrate, a top metal panel, a bottom metalpanel and a metal tube, a half-mode substrate integrated waveguide structure is adopted, based on the periodic sine impedance modulation principle, a double-period sine impedance modulation groove isformed in the top metal panel to serve as a radiation unit, and due to the fact that the top metal panel is formed by superposing sine impedances of two kinds of single beams, beams in two radiation directions can be generated; a periodically changing groove is also arranged on the bottom metal panel as a radiation unit, so that the radiation efficiency of the antenna can be improved, the stop band effect of the periodic leaky-wave antenna can be inhibited, and compared with the traditional double-beam frequency scanning antenna, the dual-beam frequency scanning leaky-wave antenna has the characteristics of simple structure, narrow bandwidth, large scanning angle and the like.

The invention discloses a planar phased array-based two-dimensional beam scanning method. According to the prior art, when a liquid crystal spatial light modulator is adopted to deflect a two-dimensional beam, only a limited deflection angle can be realized; a one-dimensional phase modulation diagram needs to be rotated; an entire scanning range is in sparse and uneven concentric circle distribution; and as a scanning angle increases, diffraction efficiency is seriously degraded, and as a result, problems such as a problem of failure to meet the practical requirements of capture, tracking andaiming (ATP) in spatial optical communication which require beam continuous scanning can be solved. With the method adopted, the problems of scanning range discreteness and uneven distribution can besolved, diffraction efficiency can be improved, and the requirements of practical application can be better met.

The invention provides a high-throughput automatic slice scanning system, which includes a base, a microscope system, an object stage, a film advancing device and a film unwinding device. The microscope system is arranged on the base, and the microscope system includes a microscope, a lifting device and an electric objective lens switching device. The stage is located below the microscope system. The stage includes an xy motion platform and a slicing disk holding device. The film feeding device is arranged on the film feeding side of the loading table, and the film feeding device includes a film feeding magazine, a slicing disk placement guide structure, a falling guide mechanism and a slicing disk feeding mechanism. The film unwinding device is arranged on the film unloading side of the stage, and the film unwinding device includes a film unloading warehouse, a slicing disk placement structure, a slicing disk lifting device and a slicing disk hook pulling device. The film feeding magazine of the present invention can accommodate a large number of slicing discs, improves the efficiency of a single scan, reduces manual intervention, and thus realizes continuous scanning of slices. The film feeding process, film unloading process and scanning movement are driven independently, which reduces the preparation time for slice handover.

The invention discloses a three-dimensional scanning method for intra-oral scanning, which is applied to the replenishing process in the intra-oral data digitization processing. The characteristic information of the 3D point cloud is used to realize continuous scanning of the intra-oral data by the scanning device, and ensure the integrity of the data. And since the matching process is acceleratedthrough the GPU, the second-level replenishing speed is realized, and the scanning experience of the equipment is improved.

The invention discloses a laser scanning control method for waveguide type liquid crystals. The method comprises the following steps of (1) arranging an electrode driving layer above a liquid crystallayer and arranging a plurality of independently controlled electrodes on the electrode driving layer, wherein one end of each electrode is provided with a laser angle control part and each laser angle control part comprises an incoming edge and an outgoing edge to ensure that both the incoming edge and the outgoing edge are straight edges and are mutually intersected or extension cords of the incoming edge and the outgoing edge are intersected; (2) respectively arranging the plurality of independently controlled electrodes as a zero-level electrode, a first-level electrode, ..., an N-level electrode along the laser incidence direction; (3) selecting the zero-level to the N-level deflection electrodes to apply positive or negative voltage according to a to-be-deflected angle; and (4) removing the positive or negative voltage when the liquid crystal level under the N-level deflection electrode achieves full deflection. The method is capable of calculating the voltage application manneron the electrodes in advance according to the characteristics of the waveguide type liquid crystals, so as to rapidly realize the continuous laser scanning of the waveguide type liquid crystals.

The invention relates to a surface type measuring device adopting laser rotary scanning.The surface type measuring device is composed of a one-dimensional sliding table system, a laser rotary scanning system and a binocular vision measuring system.The one-dimensional sliding table system is composed of a first rotary stepping motor, a motor supporting seat, a coupler, a front supporting block, a ball screw, unthreaded shafts, a linear sliding table, a rear supporting seat and a base.The laser rotary scanning system is composed of a screw, a screw sleeve, connecting rods, a laser device sleeve, a laser device, a second rotary stepping motor, a polyhedron rotary mirror and a motor support.The binocular vision measuring system is composed of a bottom plate, cameras, supporting rods and set screws.According to the surface type measuring device, the second rotary stepping motor is used for driving the polyhedron rotary mirror to rotate, a laser emitted by the laser device irradiates a reflecting mirror of the polyhedron rotary mirror, and the laser point is reflected by the reflecting mirror and irradiates on a measured surface.The two cameras shoot the laser point irradiating the measured surface at the same time, a computer controls the shooting process of the two cameras and achieves real-time collecting and analyzing of shot data, and thus it is achieved that the computer controls output of three-dimensional coordinate points in binocular vision measuring.

The invention provides a laser scanning electrode structure. The laser scanning electrode structure comprises a liquid crystal layer, an electrode driving layer is arranged above the liquid crystal layer, an electrode driving device is arranged on the electrode driving layer, the electrode driving device comprises a laser angle control part, the laser angle control part comprises an incident edgeand an emergent edge, the incident edge and the emergent edge are straight edges and are intersected with each other or extending lines of the incident edge and the emergent edge are intersected witheach other, and the electrode driving device is electrically connected with the liquid crystal layer. Through the arrangement of the liquid crystal layer and the electrode driving device, the refractive index of the liquid crystal layer can be changed through electrode control, and therefore, the change of the laser propagation direction is achieved. Because of the fact that a discrete electrode structure is adopted, when high sampling frequency and high-precision regulation and control are achieved, the requirement for later-period electric control signals is greatly lowered, and accurate control over the scanning angle by the voltage is achieved.

The present invention discloses a linear frequency modulation optical grating 5bit optical fiber delay network device and a design method thereof. The device comprises an optical input module, a linear frequency modulation optical grating and an N-path optical switch, N is a positive integer, wherein the optical input module is configured to allow radio-frequency signals to be delayed to be carried on optical signals, the linear frequency modulation optical grating is configured to perform first-order delay for the radio-frequency signals on the optical signals, and each path of the N-path optical switch is provided with single mode fibers with different lengths configured to divide the radio-frequency signals after first-order delay into N paths and perform secondary delay of different time. The linear frequency modulation optical grating 5bit optical fiber delay network device and the design method thereof apply frequency modulation optical grating to greatly reduce the usage of theoptical fiber, only need to design the model of the optical grating according to actual demands to achieve continuous regulation of an optically controlling phased array radar waveform, and are largein delay range, high in precision, simple in structure and flexible in design.

The invention discloses an integrated lens antenna, which comprises a first dielectric lens, a microstrip radiation unit and a base, the microstrip radiation unit is arranged at one side of the base and located in the base; the first dielectric lens is of a rotational symmetry structure, and a main body of the first dielectric lens is hemispherical; the plane side of the first dielectric lens is arranged at the other side, far away from the micro-strip radiation unit, of the base, and is spaced from the micro-strip radiation unit; therefore, a certain height difference exists between the hemispherical dielectric lens and the microstrip radiation unit, the influence of the dielectric lens on the impedance matching performance of the microstrip radiation unit is reduced, and the hemispherical rotational symmetric structure can convert the radiation beam of the microstrip radiation unit into a parallel beam; therefore, the radiation beam can realize continuous scanning in the two-dimensional direction and can be converged, the gain of the lens antenna is improved, and the continuous scanning in the two-dimensional direction of the antenna is realized.

The invention belongs to the field of power system simulation, and in particular relates to a three-dimensional scanning method for an electrical complex torque coefficient based on PSCAD (Power System Computer Aided Design).The method comprises the following steps: loading a three-dimensional scanning module of the electrical complex torque coefficient on electromagnetic transient software, calculating a series compensation capacitance value according to a series compensation degree, and then generating a disturbance and applying to a rotor mechanical torque; when a system once again enters into a steady state, extracting a generator electromagnetic torque signal and a rotor angular velocity response variable, and calculating the electrical complex torque coefficient; judging whether a scanning frequency exceeds a cut-off frequency or not, if not, increasing a frequency scanning step length, if yes, stopping calculation; judging whether a scanning compensation degree exceeds a cut-off compensation degree or not, if not, increasing a compensation degree scanning step length, if yes, completing three-dimensional scanning. According to the three-dimensional scanning method disclosed by the invention, the frequency and the compensation degree are continuously scanned to obtain a three-dimensional curve of the frequency, the compensation degree and the complex torque coefficient, the simulation method is fast, the cost is low, and the three-dimensional scanning method is not affected by multiple FACTS (Flexible Ac Transmission System) devices in the system.

The invention provides a broadband infrared scanning beam split device and a calibrating method. The device comprises an LVF, a clamp, a drive motor, a photoelectric switch, a zero position opening, an external pressing ring and an internal pressing ring. The drive motor drives the clamp with a gradual optical filter to conduct rotating scanning test, the internal pressing ring and the external pressing ring of the clamp press the non-working region of the LVF to conduct fixing, assembly is simple and firm, and the high-speed rotating scanning test can be achieved. Compared with a CVF, by the adoption of the scheme, the coating technology difficulty and coating cost are lowered greatly, and through a corresponding wavelength calibrating algorithm, continuous test of broadband infrared radiation can be achieved.

The invention provides a light emission angle modulation device for three-dimensional displayer pixels and belongs to the technical field of naked eye three-dimensional display. The light emission angle modulation device for the three-dimensional displayer pixels is sequentially composed of a light source, a refractive index matching layer, a precious metal film, a liquid crystal layer and a transparent conducting layer, wherein the upper surface and the lower surface of the precious metal film are respectively of a nanometer period structure. Light and surface plasmons are effectively coupled on the surfaces of the precious metal film through the nanometer period structures, so that surface plasmon resonance is generated and only incident light at the surface plasmon resonance angle is made to permeate the precious metal film. The crystal liquid layer controls and adjusts the refractive index through electric signals to change the surface plasmon resonance angle, and therefore light emission angle modulation is conducted through the electric signals. According to the light emission angle modulation device, continuous scanning of the light-emitting direction and strength in a space can be achieved. A three-dimensional displayer composed through a pixel array can be used for simulation and recurrence of a scattering field of an object or different display images are projected at different angles, and therefore a three-dimensional image is displayed naturally and vividly.

The invention discloses a separated lens antenna and communication equipment. One side of a dielectric lens is arranged to be a plane, the other side of the dielectric lens is arranged to be a convex face with the height changing in the single-dimension direction, and the dielectric lens is arranged at the position where the distance between the dielectric lens and a micro-strip radiation unit equals the focal length of the dielectric lens through a lens support, so that electromagnetic waves can be fully diffused when propagating between the micro-strip radiation unit and the lens, and when propagating to the dielectric lens, the electromagnetic waves can be radiated to the outer side of the dielectric lens only after passing through the convex surface of which the height changes along the single-dimensional direction; therefore, the phase change of the electromagnetic wave is changed only in a single-dimensional direction, and the phase change of the electromagnetic wave in other dimensional directions is not changed, so that the radiation gain of the antenna is enhanced, and the beam direction of the electromagnetic wave radiated by the microstrip radiation unit is ensured to be consistent with the beam direction of the electromagnetic wave emitted after passing through the dielectric lens. Therefore, continuous scanning of the antenna in the one-dimensional direction is realized.

The invention discloses a laser radar and a two-dimensional scanning method of the laser radar. The laser radar comprises at least one tunable laser and a scanning device, and the tunable laser is used for outputting a laser beam with continuously variable wavelength; and the scanning device comprises at least one scanning mirror and a driving device, and a diffraction grating is arranged on the scanning mirror and can have different diffraction angles for light of different wave bands. Continuous scanning in the horizontal one-dimensional direction is achieved through vibration or rotation ofthe scanning mirror, laser beams with different emergent angles are obtained through grating diffraction by changing the wavelength output by the tunable laser, and scanning in the vertical two-dimensional direction is achieved. According to the invention, the density of the laser point cloud is increased, the resolution of the spatial orientation is improved, and the device is simple in structure and easy to realize.

The invention provides a wheel type probe fixing system for vertical flaw scanning. The system comprises a fixing frame, a pair of walking wheels and a water wheel seat; at least three probes are arranged on the water wheel seat; and the probes comprise at least one transmitting probe or receiving probe; ultrasonic waves emitted by the transmitting probe can be received by a receiving probe after being subjected to twice mirror reflection of a vertical flaw in a track and the bottom surface of the track; the multiple probes on a probe support can be matched to scan the vertical flaw at multiple heights in a flaw detection area. According to the wheel type probe fixing system for vertical flaw scanning, the walking wheels can be automatically attached to the track under the action of side baffles and reset springs, and it is further ensured that the probes are kept in the center of the track under the action of a motor; and through cooperation of the multiple probes, continuous scanning of the whole height range in the flaw detection area is achieved, and use is convenient.

The invention discloses a liquid crystal light beam deflection and scanning device. The device comprises a wedged liquid crystal box, a liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination and a quarter-wave plate, wherein a liquid crystal layer is arranged between two oppositely arranged base plates of the wedged liquid crystal box; light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and molecules on the liquid crystal layer are uniformly distributed and in parallel with the first base plate; the liquid crystal polymer polarization grating and adjustable liquid crystal half-wavelength plate combination is provided with two parallel base plates, a liquid crystal layer and liquid crystal polymers, the light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and light-alignment films with molecules pointing to the vector direction and gradually changing periodically are arranged on the sides, adjacent to the liquid crystal polymer layer of the two base plates; the quarter-wave plate is used for converting linearly polarized light into circularly polarized light. Continuous light beam deflection and scanning in a large angle range can be realized by means of the liquid crystal light beam deflection and scanning device.

The embodiment of the invention provides a phased array laser radar and a scanning method of the phased array laser radar. The phased array laser radar comprises an SOI substrate, an input coupler, a beam splitter, a phase modulator group, an optical antenna and a protection layer; the input coupler, the beam splitter, the phase modulator group and the optical antenna which are sequentially connected through an optical path are formed in the SOI substrate, and the protection layer is located above the input coupler, the beam splitter, the phase modulator group and the optical antenna; the waveguide heating lengths corresponding to adjacent phase modulators in the phase modulator group are in a monotone increasing or monotone decreasing equal ratio relation, and the phase modulators in the phase modulator group share a negative electrode and have independent positive electrodes. After the reference voltage of each phase modulator is determined, continuous scanning can be realized only by uniformly changing the voltage value of each phase modulator group. The working efficiency of the phased array laser radar is improved, and the working complexity is reduced.

The invention provides a high-flux automatic slice scanning system. The high-flux automatic slice scanning system comprises a base, a microscope system, an objective table, a slice feeding device anda slice withdrawing device, the microscope system is arranged on the base and comprises a microscope, a lifting device and an electric objective lens switching device. The objective table is positioned below the microscope system. The objective table comprises an xy motion platform and a slicing disc clamping device. The slice feeding device is arranged on the slice feeding side of the objective table and comprises a slice feeding warehouse, a slice disc placement guide structure, a falling guide mechanism and a slice disc feeding mechanism. The slice withdrawing device is arranged on the slice withdrawing side of the objective table and comprises a slice withdrawing warehouse, a slice disc containing structure, a slice disc lifting device and a slice disc hooking and pulling device. The slice feeding library can contain a large number of slice discs, the efficiency of single scanning is improved, manual intervention is reduced, and therefore continuous scanning of slices is achieved.The slice feeding process, the slice withdrawing process and the scanning motion are independently driven, so that the slice handover preparation time is reduced.

The invention discloses a compact feeding network type artificial surface plasmon polariton (SSPP) planar antenna array, which relates to the technical field of antennas. The planar antenna array is composed of an SSPP power division network and a transmission type phase gradient metasurface. The SSPP power distribution network is a 1-to-2 power distribution network, so that the generated SSPP is not only transmitted according to the design direction, but also the SSPP energy is transmitted according to the design ratio. Using the SSPP power-dividing network to feed and decoupling through the transmission-type phase gradient metasurface, a two-way compact SSPP planar antenna array is realized. Simulation and experimental verification show that in the 6.7-14GHz frequency band, the average gain of the SSPP flat panel antenna array is 16.9dB, the total antenna efficiency is above 80%, and the highest total efficiency reaches 93.5%.