62 results about "Beam matching" patented technology

The invention relates to a coherent combining device of self-adaption high-order transverse mode lasers, which comprises a solid laser, a deformable mirror, a beam matching system, a CCD camera, a beam splitting reflector, a high-pressure amplifier, a focusing lens, an attenuation system and a computer. High-order transverse mode lasers output by the solid laser are irradiated to the deformable mirror after being expanded by the beam matching system; laser beams reflected by the deformable mirror are gathered on the CCD camera at a focal position after passing through the beam splitting reflector, the attenuation system and the focusing lens in sequence; an optimization algorithm placed in the computer iterates along the direction enabling the strength of the peak value of a focal spot on the CCD camera to work out a voltage signal; the voltage signal is loaded to each driver of the deformable mirror after being amplified by the high-pressure amplifier to drive the deformable mirror to generate corresponding deformation so as to compensate the distortion in the whole wavefront phases of the high-order transverse mode lasers, compensate the pi-phase step of sidelobes of both sides of each nodel line of the high-order transverse mode lasers and improve the coherent feature and the focusable capability of the high-order transverse mode lasers. The invention can improve the coherent performance and the focusable capability among high-order transverse mode beams.

The invention discloses a method of treating a lining after collapse of an underground cavern crown, relates to the field of underground cavern construction, and provides a method of treating the lining after collapse of the underground cavern crown, with low workload, low cost and effective collapse prevention. The method includes the steps of a, clearing collapse waste in the cavern; b, inserting at least one reinforcing anchor bar into the residual collapse waste and surrounding rock on two sides of the residual collapse waste, and allowing one end of each reinforcing anchor bar, close to the cavern, to be located in the same cross section; c, connecting an arch beam matching with the cross section of the cavern crown in shape to all reinforcing anchor bars, and attaching the arch beam to the cavern crown; d, subjecting the residual collapse waste to systematic consolidation grouting; and e, repeating the steps from a to d until the collapse waste in the cavern is fully cleared. The method is applicable to repairing collapsed underground caverns.

In order to be able to detect an irradiation position of an electron beam matching a defect position and conduct composition analysis of a defect with high precision and high efficiency, in the present invention, when a composition analysis target defect is selected and irradiation conditions of the electron beam are set for EDX analysis, a low-resolution reference image of low resolution is acquired using the electron beam at a defect corresponding position corresponding to the position of this defect on a chip in the vicinity of a target chip including defects, and a low-resolution defect image of the same low resolution is next acquired at the defect position of the target chip. Then, by comparing these low-resolution images, the defect position is acquired, the electron beam is slanted and irradiated on this defect position to acquire a composition spectrum of the defect.

The invention discloses an all-solid-state short wave ultraviolet laser source which comprises a near-infrared base frequency laser, a second harmonic frequency non-linear optical crystal, a light beam matching regulator control system, a fourth harmonic frequency non-linear optical crystal and a light beam splitting collimation reshaping system, wherein the second harmonic frequency non-linear optical crystal, the light beam matching regulator control system, the fourth harmonic frequency non-linear optical crystal and the light beam splitting collimation reshaping system are sequentially arranged along the laser output direction of the near-infrared base frequency laser. The near-infrared base frequency laser outputs a near-infrared laser, a second harmonic frequency laser is generated through the second harmonic frequency non-linear optical crystal and enters the fourth harmonic frequency non-linear optical crystal through the light beam matching regulator control system, a high-efficiency fourth harmonic frequency laser is generated, and output of a short wave ultraviolet laser with high power and high light beam quality is achieved through the light beam splitting collimation reshaping system. According to the all-solid-state short wave ultraviolet laser source, output of the high-efficiency near-infrared base frequency laser is achieved through precise wavelength choice technology and low-gain laser oscillation amplification technology, output of the high-efficiency second harmonic frequency laser is achieved through the non-linear optical crystal, then generation of the high-efficiency fourth harmonic frequency laser is achieved through the non-linear optical crystal, and therefore the output of the short wave ultraviolet laser with the high power and the high light beam quality is achieved.

The invention relates to a self-adapting optical human micro-visual field defect evaluation system. The light emitted by a beacon penetrates a collimating mirror, a first reflecting mirror and a first beam-splitting mirror and then enters the pupilla of human eyes. The reflected light from the ocular fundus penetrates the first beam-splitter mirror and a first beam-matching telescope, is reflected by a wavefront corrector, penetrates a second beam-matching telescope, a second reflecting mirror and a second beam-splitting mirror and enters a Hartman wavefront sensor. A computer calculates and controls the voltage according to the detected aberration and drives the wavefront corrector to correct the human eye aberration after the high-voltage amplification. After the aberrational correction is completed, the computer software generates a stimulating visual sign and the stimulating visual sign is displayed on a stimulating visual sign display device. A subject observes the stimulating visual sign via the system and makes the determination. The determination of the subject is recorded for the evaluation of the human visual field defect. Based on the self-adapting optical techniques, the self-adapting optical human micro-visual field defect evaluation system greatly reduces the visual field examination stimulus redundancy caused by the human eye aberration, realizes the early diagnosis of early-stage tiny visual field defect caused by diseases, and provides a powerful tool for the human micro-visual field evaluation and the early diagnosis of the related diseases.

The embodiment of the invention provides a broadcast beam forming method, and a base station. The method comprises the following steps: determining horizontal dimension arrival angles, vertical dimension arrival angles and TAs of terminals accessing the base station to a two-dimensional antenna array; determining a target horizontal dimension interval range in which a terminal ratio exceeds a first ratio threshold, and a target vertical dimension interval range in which the terminal ratio exceeds a second ratio threshold according to the horizontal dimension arrival angles, the vertical dimension arrival angles and the TAs of the terminals; determining the width of the target horizontal dimension interval range as a target horizontal beam width, and determining the width of the target vertical dimension interval range as a target vertical beam width; and obtaining a beam forming parameter corresponding to a target broadcast beam matching the target horizontal beam width and the targetvertical beam width to correspondingly adjust antenna weights of antenna arrays to generate a target broadcast beam. By adoption of the method and the base station provided by the embodiment of the invention, the broadcast beam matching a user hotspot can be formed, and the broadcast coverage signal quality of the user hotspot is improved.

A reflection type artificial crystal aberration Hartmann instrument mainly comprises a light source, a beam matching system, a standard spherical reflector, a aperture segmentation element, a photoelectric detector and a computer, wherein, a Hartmann wave-front sensor is composed of the aperture segmentation element and the photoelectric detector. Lights emitted by the light source are collimated to be emitted in parallel. The parallel lights pass through an artificial crystal to be measured by a reflector and a spectroscope in sequence. Transmission light waves arrive at the standard spherical reflector which is axially adjusted to lead to the coincidence of the back focus of the artificial crystal to be measured and the spherical center of the standard spherical reflector. Reflected light waves return along an original optical path, pass through the artificial crystal to be measured again, then pass through the spectroscope and the beam matching system in sequence and are segmented and sampled by the aperture segmentation element, and then are focused on the photoelectric detector to form light spot arrays. The acquired light sport data is sent to the computer to be processed, so as to obtain the aberration of the artificial crystal to be measured. The reflection type artificial crystal aberration Hartmann instrument has the advantage of simple and stable structure, which is a convenient, fast and reliable detection tool for the ophthalmology clinical artificial crystal transplantation and processing and the detection of artificial crystals for personalized human eye aberrations correcting.

Disclosed is a method for positive-branch confocal unstable cavity mirror disorder monitoring which is characterized in that: monitor system comprising He-Ne light source, unstable cavity mirror, beam splitter, focusing lens, light beam mass center detecting CCD, light beam matching telescope, stepper motor and controller, H-S wave front sensor, image collecting card, autocollimator and data collect process computer; wherein the positive-branch confocal unstable cavity comprising 45 degree reflector group, coupling output mirror, convex reflector and concave reflector. The inventive method has the advantages of being able to judge which optical component is disordered in cavity easily and of being able to calculate disorder value accurately.

The invention provides a fast beam training and tracking method for millimeter wave communication of an unmanned aerial vehicle. The fast beam training and tracking method for millimeter wave communication of an unmanned aerial vehicle comprises the following steps of: presetting a layered codebook conforming to a hybrid beam forming structure, performing beam matching searching according to a traditional multi-level beam training mode, finding an optimal beam and transmitting a communication signal. The invention has the beneficial effects that: the fast beam training and tracking method formillimeter wave communication of the unmanned aerial vehicle utilizes the continuity characteristic that the millimeter wave communication is mainly LOS path and the movement of the unmanned aerial vehicle, and in most beam mismatch scenes, the new matching beam can be found faster than the traditional layered training scheme.

The invention relates to a system for adjusting the confocal unsteady cavity and detecting the optical aberration, characterized in that it comprises a He-Ne light source, a confocal unsteady cavity lacuna, a light beam matching telescope, a Hageman sensor, a four-quadrant intensity sensor, an image collecting card and a computer, wherein the confocal unsteady cavity lacuna comprises the 45 deg. reflecting mirror group, coupling output mirrors, convex reflecting mirrors and concave reflecting mirrors. The invention can adjust the optical cavity coaxials quickly, and can detect, process and decide the optical aberration in the cavity.

The invention relates to a Hartmann wave-front sensor eliminating astigmatism of system itself, comprising measuring light source system, beam matching system, micro-lens array and CCD. Polarizer is set at the front of light outlet of measuring light source system and 1 / 4 wave plate is set between beam matching system and measured part. Polaroid analyzer is set at the front of micro-lens array and the polarizing detecting direction of Polaroid analyzer is vertical with the polarizing direction of polarizer. Light emitted by the measuring light source system becomes linear polarized light by the polarizer and after the linear polarized light passes through the beam matching system it becomes circular polarized light. After it passes trough measured part it returns system. After 1 / 4 wave plate circular polarized light becomes linear circular polarized light. Here polarized direction is vertical with the polarized direction when it is emitted by polarizer. After beam matching system and Polaroid analyzer, it enters into micro-lens array to measure. The invention decreases centroid calculation error generated by stray light and improves measuring accuracy.

The invention discloses a torsion beam. The torsion beam comprises a left cross beam, a right cross beam and a middle connecting beam. A left cross beam matching part is arranged at the right end of the left cross beam. A right cross beam matching part is arranged at the left end of the right cross beam. A left side connecting part and a right side connecting part are arranged on the middle connecting beam. The left side connecting part is connected with the left cross beam matching part, and the right side connecting part is connected with the right cross beam matching part, wherein in the length direction of the torsion beam, the position of the left side connecting part relative to the position of the left cross beam matching part and the position of the right side connecting part relative to the position of the right cross beam matching part can be adjusted. According to the torsion beam, the length of the torsion beam can be adjusted to adapt to vehicles with different wheel tracks, mould reopening for manufacturing torsion beams is not needed, universality is improved, the research and development cost is lowered, and the research and development cycle is shortened.

The present invention belongs to the technical field of wireless communication, and particularly relates to a method for grouping users based on out-of-band spatial information in a multi-user millimeter wave system. By a grouping strategy, the out-of-band spatial information is fully utilized and the search range is narrowed on the base station side to perform beam search within a more accurate initial range. On the user side, the number of receiving beam search times is reduced and the energy consumption is saved for users by a strategy that search subframes which are not in the group keep mute. In the feedback process, the user side just needs to feed back beam matching information within search subframes corresponding to the group. The disadvantage that more redundant information is fed back in a traditional search method is overcome, so the feedback overhead is reduced and the system efficiency is improved.

The invention discloses a high-intensity magnetic field and high-frequency field coupled test method and a superconducting cyclotron based on the method, which are used in the technical field of measurement of electromagnetic field characteristics and electric field distribution of a high-current proton cyclotron. The method comprise the following steps of: carrying out matching setting test on overall parameters of a high-intensity magnetic field and a high-frequency field; balancing matching setting test of high-frequency voltage symmetry and axial focusing; carrying out matching setting test between a magnetic field and high-frequency system and the working path; carrying out matching setting test between an ion source and a central area high-frequency cavity; and carrying out matchingsetting test between the central area high-frequency cavity and a main magnet core column. The cyclotron is a miniaturized high-dose medium-energy superconducting cyclotron, and comprises a matching structure between a superconducting strong magnetic field system and the high-frequency system, a matching structure between a main vacuum system and the ion source and a matching structure between thesuperconducting strong magnetic field system and the high-frequency system, and a beam matching structure in the whole process from the ion source to a central region to an acceleration region to a leading-out region. According to the invention, the cooperation technology of each link is adopted, and the new problems of miniaturization and high dosage are solved from the overall effect.

The invention relates to a full aperture radiometer which is formed by a light beam matching system, a filtering system, a two-dimensional lattice CCD and a data gather and processing system, wherein the light beam matching system changes the aperture of the tested light beam to the target surface size of the two-dimensional lattice CCD; then the filtering system deposits the diffused light and waves the intensity of the tested light beam to the rage which two-dimensional lattice CCD can measure; two-dimensional lattice CCD can measure the light intensity in the rage of the tested laser amplifier full aperture, which changes the two-dimensional light intensity signal of the filtered laser beam into electric signal by changing the gray scale signal to light intensity and image-aiming; the data gather and processing system adopts the measuring data of the two-dimensional lattice CCD and stores it, computes and outputs the full aperture light intensity, the light intensity evenness and the relevant parameter of the light intensity evenness.

The invention discloses an electric vehicle battery quick change device, further discloses an electric vehicle, and further discloses an electric vehicle battery quick change method. The electric vehicle battery quick change device comprises a fixing plate, a first sliding block and a second sliding block. The fixing plate is provided with a perforation, a first track and a second track communicating with the first track. The first sliding block is disposed in the first track, the first sliding block can slide in the first track, the second sliding block is disposed in the second track, and the second sliding block can slide in the second track. The first sliding block is connected with the second sliding block through a connecting rod, and the first sliding block and the second sliding block are linked to move. The perforation is used for being connected with a vehicle body longitudinal beam matching block. The electric vehicle battery quick change device adopts a pure mechanical motion mechanism, realizes fixing and locking of the mechanism by the sliding block movement, and has a good locking effect; the electric vehicle battery quick change device is in interference fit with avehicle body to facilitate maintenance, a power part of the quick change device is located on a battery changing tray, vehicle body connecting equipment is simple, and the overall lightweight effect is good; and the installation operation is simple and fast, the disassembly is convenient, and the firmness is high and the cost is low.

The invention provides a relay satellite system beam scheduling system and method for multiple types of service requirements. The system comprises a beam feature generation module, a service feature acquisition module, a heterogeneous beam scheduling model construction module, a variable acquisition module, a service beam matching module, a beam scheduling module and a service scheduling sequence optimization module. The beam feature generation module comprises a plurality of antennas with different frequency bands and different types, and a control mechanism of the plurality of antennas; the beam feature generation module is used for generating beam forming required by services and executing beam switching when the services are provided for different users; and the optimized beam scheduling scheme output by the beam scheduling module is provided for the beam feature generation module for executing the service required by the user.

The invention discloses a user scheduling and analog beam selection optimization method based on a whale algorithm. The method comprises the following steps: converting an optimization problem model into a non-convex NP difficult problem model; converting inequality constraints of the problem model into a penalty function form, and converting binary constraints into features of an algorithm search population; multiplying the converted inequality constraint by an indication factor and a penalty coefficient, then superposing the multiplied inequality constraint on an original optimization target, and constructing a fitness function to obtain an analog beam set matched with the user set; carrying out simulation wave beam matching, i.e., selecting an optimal simulation wave beam for each user; and after the analog beams are matched, judging whether all the users in the user set are matched or not, and when all the users are matched, scheduling channels according to the analog beam set matched with the user set. The problem of joint optimization of user scheduling and beam selection of the hybrid mmWave system is solved, and the performance of the system is further improved.

The invention discloses a side-by-side door combination refrigerator and a vertical beam matching assembly thereof. The side-by-side combination refrigerator comprises a refrigerator body, a first door body, a second door body and a vertical beam connected to the first door body in a rotatable manner. The vertical beam matching assembly comprises a guide slot formed in one of the end surface of the vertical beam and the refrigerator body, an opening being formed in the front part of the guide slot; a guide bulge which is matched with the guide slot and is arranged on the other one of the end surface of the vertical beam and the refrigerator body, the guide bulge and the guide slot being matched with each other to guide the vertical beam to rotate relative to the first door body; and a sealing piece which is convexly arranged on the other one of the end surface of the vertical beam and the refrigerator body, wherein when the first door body is in a closed state, the sealing piece is matched into the guide slot and seal the opening. Compared with the prior art, the side-by-side door combination refrigerator can solve the problem of cold leakage from the end part of the vertical beam, so that the energy consumption can be reduced; and furthermore, the structure of a door seal fin is canceled, a door seal manufacturing process is optimized, and the cost is saved.

The invention discloses a segmental assembling beam prestressed duct connector which comprises a concrete segmental precast beam matching section sleeve, a cast-in-place section sleeve, a one-way plug, a two-way plug, an inner clamping ring and a sealing ring. By means of the duct connector, after a cementing and splicing seam of a beam section is squeezed and spliced, epoxy resin glue can be prevented from being squeezed into a duct through the sealing ring, and when duct grouting is conducted, the sealing ring can guarantee that the duct is free of water leakage and cross string hole.

The invention discloses a waveless front detector far-field laser beam shaping device based on a double-wavefront corrector. The device comprises a laser system, a wavefront correction system, a beam matching system, a monitoring system, a working system and a computer control system; the monitoring system collects far-field light-intensity form distribution information, the computer control system concurrently controls the double-wavefront corrector according to an optimization algorithm, corrects system aberration in real time and generates a near-field modulation phase needed by far-field laser beam shaping, and laser beam shaping on the monitoring system is achieved; by means of the characteristic that incident pupil face phase distributions of the working system and the monitoring system are the same, when the laser beam shaping is achieved on the monitoring system, the laser beam shaping is synchronously achieved on the working system. According to the waveless front detector far-field laser beam shaping device based on the double-wavefront corrector, the double-wavefront corrector is adopted to promote the shaping range and accuracy of the system; a waveless front detection method is adopted, dynamic aberration of the system can be corrected, and far-filed light-intensity real-time shaping is achieved.

The invention discloses a method and device for establishing beam connection and electronic equipment. The method comprises the steps: enabling first equipment to determine the position of a first part of a user; transmitting and controlling a first wave beam to point to the position of the first part; receiving a second wave beam emitted by second equipment, the second wave beam being emitted based on a second wave position, the second wave position being a wave position with an optimal signal determined by the second equipment based on beam scanning of the first wave beam; and establishing beam connection based on the second wave position. According to the method and device for establishing beam connection and the electronic equipment, after the first part position of the user bound withthe second equipment is determined, the first beam directly points to the second equipment located at the first part position, and due to direct pointing, it can be guaranteed that signals are optimal; therefore, compared with the prior art in which the first device needs to traverse the wave position to search for the wave position with the optimal signal, the beam matching speed is greatly improved, and the user experience is improved.

The invention provides a beam matching method and a communication device. The beam matching method includes the following steps that: a beam scanning parameter group is determined, wherein the scanning parameter group includes M, P, and Q, wherein M refers to the number of time-domain repetition signals in one OFDM symbol, P refers to the length of a 0 sequence between two adjacent time-domain repetition signals in the OFDM symbol, and Q refers to the length of the 0 sequence between a cyclic prefix and the first time-domain repetition signal in the OFDM symbol; the beam scanning parameter group is transmitted to a receiving end device; and pilots are transmitted based on the beam scanning parameter group, so that beam scanning can be transmitted or received. With the beam matching methodand the communication device provided by the technical schemes provided by the present invention adopted, some gaps, such as the 0 symbol sequence, can be interpolated to both sides or one side of thetime-domain repetition signals; in addition, due to the presence of the gaps, a traditional interleaved frequency division multiple access (IFDMA) scheme can be improved to support the transmitting or receiving of beam scanning in the time domain.

The invention discloses a method for simulating a spatial energy spectrum environment by using a single energy electron beam. The method comprises: a spatial plasma distribution function and a velocity element of the distribution function of a GEO orbit are determined; expression relationships between characterization parameters and the velocity element of a single energy electron beam and plasma are established respectively; a matching equation is established by using velocity element identity as a matching target according to a plasma characterization parameter value of a to-be-simulated spatial energy spectrum environment, the equation is solved to obtain the density and velocity of the single energy electron beam for simulating the spatial energy spectrum environment, and then the energy and beam current density of the single energy electron beam are obtained by transform. According to the invention, the velocity elements of the single energy electron beam and the spatial energy spectrum distribution plasma are matched and the energy and beam current density selection parameters of the single energy electron beam are obtained by calculation, so that description of spatial energy spectrum plasma environment characteristics is realized accurately and the support is provided for improving accuracy of the satellite charging-discharging effect ground simulation test.

A contention-based multi-antenna access request transmission / receiving procedure in MIMO OFDM / OFDMA systems is provided to reduce access latency. A mobile station encodes and transmits an access request over a shared access channel using multiple transmitting antennas, while a base station receives and decodes a number of access requests using multiple receiving antennas. Each access request comprises an access indictor and an access message. In a first MIMO scheme, the mobile station transmits the access indicator as preambles, while the access message is encoded by SFBC / STBC to obtain spatial diversity. At the receive side, the access indicator is exploited as pilots for channel estimation. The access message is decoded using SFBC / STBC decoding algorithm. In a second MIMO scheme, the mobile station performs precoding / beamforming for each of the transmitting antenna to obtain beamforming gain, while the base station performs virtual beam matching based on the detection results of the access indicators.

The invention discloses a segmental assembling beam prestressed duct connector which comprises a concrete segmental precast beam matching section sleeve, a cast-in-place section sleeve, a one-way plug, a two-way plug, an inner clamping ring and a sealing ring. By means of the duct connector, after a cementing and splicing seam of a beam section is squeezed and spliced, epoxy resin glue can be prevented from being squeezed into a duct through the sealing ring, and when duct grouting is conducted, the sealing ring can guarantee that the duct is free of water leakage and cross string hole.

The invention discloses an aircraft component frame beam gap design method, device and equipment and a storage medium, a corresponding assembly gap model is established by extracting a gap parameter value of a frame beam matching model, a corresponding simulation gap value is calculated through a Monte Carlo simulation algorithm, and finally a CPK value is calculated through the simulation gap value. The corresponding gap parameter value is adjusted according to the CPK value to ensure that the gap parameter value of the final design scheme meets the design requirement; according to the invention, Montero simulation calculation is used for replacing a real object verification test, so that the test cost is reduced, and the test efficiency is improved; meanwhile, the CPK value is introduced and serves as the basis for adjusting the gap parameter value, so that the influence of the technological process capacity on the gap value is considered during gap design, the simulation value is calculated based on the influence, the gap is correspondingly adjusted, the adjusting process is more targeted and instructive, and the efficiency and precision of gap design adjustment are improved; and meanwhile, the final optimization result better meets the product quality requirement, and is more real and reliable.

The invention relates to a self-adapting optical human micro-visual field defect evaluation system. The light emitted by a beacon penetrates a collimating mirror, a first reflecting mirror and a firstbeam-splitting mirror and then enters the pupilla of human eyes. The reflected light from the ocular fundus penetrates the first beam-splitter mirror and a first beam-matching telescope, is reflectedby a wavefront corrector, penetrates a second beam-matching telescope, a second reflecting mirror and a second beam-splitting mirror and enters a Hartman wavefront sensor. A computer calculates and controls the voltage according to the detected aberration and drives the wavefront corrector to correct the human eye aberration after the high-voltage amplification. After the aberrational correctionis completed, the computer software generates a stimulating visual sign and the stimulating visual sign is displayed on a stimulating visual sign display device. A subject observes the stimulating visual sign via the system and makes the determination. The determination of the subject is recorded for the evaluation of the human visual field defect. Based on the self-adapting optical techniques, the self-adapting optical human micro-visual field defect evaluation system greatly reduces the visual field examination stimulus redundancy caused by the human eye aberration, realizes the early diagnosis of early-stage tiny visual field defect caused by diseases, and provides a powerful tool for the human micro-visual field evaluation and the early diagnosis of the related diseases.

The invention discloses a user scheduling and simulation beam selection optimization method based on machine learning. The method includes the following steps: obtaining each user channel feature vector; simulation beam matching: sequentially inputting each user channel feature vector to the beam prediction model Determine the analog beam, use multiple beam classifiers to divide the downlink channel between the base station and the selected user into multiple different beam classes, use the hyperplane to predict the channel class and select the best analog beam for each user; after After matching the analog beams, it is judged whether all users in the user set have been matched. When all users are matched, channel scheduling is performed according to the analog beam scheduling set, where the analog beam scheduling set is the analog beam set corresponding to the output user set. The invention reduces the computing power required by the applicable large-scale system, has high compatibility, reduces the cost of communication system construction, and reduces the time delay of user matching channels in the case of multiple users.