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37results about How to "Overcome position" patented technology

Underwater pipeline detector based on underwater robot

The invention relates to an underwater pipeline detector based on an underwater robot. The underwater pipeline detector comprises an overwater control device and an underwater detection device, wherein the overwater control device is connected with the underwater detection device through an umbilical cable; the underwater detection device is arranged on the underwater robot, and is used for detecting position and burial depth of a seabed pipeline; and the overwater control device is used for controlling operation of the underwater detection device. Compared with the prior art, the underwater pipeline detector solves the difficulty that the position and the burial depth of the pipeline cannot be detected by means of an acoustic wave pipeline instrument detection method, multi-beam side-scan sonar detection, magnetic detection, ROV camera shooting, diving photographing by a diver and the like in a deep water region and under a turbid condition. Through adopting the method of combining the overwater equipment with the underwater equipment, and regarding ROV as a carrier, the underwater pipeline detector enters the deep water region, carries out non-destructive detection by adopting an electromagnetic induction principle, and overcomes the pipeline detection difficulties of small pipe diameter, sludge and sand layer coverage and turbid water region.
Owner:GUANGDONG KENUO SURVEYING ENG CO LTD

3D printing remote monitoring device and method

The invention discloses a 3D printing remote monitoring device and method. The device comprises a camera, a stepping motor, and a single-chip microcomputer. The camera is disposed on a pitching turning assembly, and the pitching turning assembly is disposed on a horizontal rail which is disposed on a 3D printing rack through a pedestal. The stepping motor is disposed on the horizontal rail and the pitching turning assembly, and is used for driving the camera to move horizontally or carry out pitching rotation. The stepping motor is connected to the single-chip microcomputer through a stepping motor drive circuit. The single-chip microcomputer is used for receiving a control instruction from an upper computer, and remotely controls the camera to rotate. The method comprises the following steps: (1) building a network connection; (2) remotely controlling the camera to move; (3) transmitting monitoring video information in real time; (4) receiving the monitoring video information through the upper computer; (5) monitoring the working state of a 3D printer; (6) remotely controlling the 3D printer. The device and method can be used for the remote monitoring of the 3D printer.
Owner:XIDIAN UNIV

Machine vision-based strawberry appearance quality judgment method

The invention discloses a machine vision-based strawberry appearance quality judgment method. The method specifically comprises the following steps of 1: establishing a three-camera vision platform and then all-directionally acquiring strawberry RGB images in an industrial scene; 2: performing image segmentation by utilizing the acquired images in the step 1, then defining fruit regions of interest, and extracting strawberry fruit contours; 3: extracting shape feature vectors of strawberries by using a shape invariant feature extraction operator through utilizing the extracted strawberry fruit contours in the step 2, thereby overcoming the problems of different sizes, positions and orientations of the strawberries; and 4: training a support vector machine by utilizing the acquired sample images of strawberries in different shapes in the step 1 and the extracted feature vectors in the steps 2 and 3, and determining optimal parameters and classification accuracy of the support vector machine. The invention provides a strawberry appearance quality judgment method with the characteristics of high accuracy, robustness, real-time property and no damage for the problems of low manual identification efficiency, high mechanical damage rate and the like, and actual usage requirements are met.
Owner:CHUZHOU UNIV

Large scale phased array difference beam forming system based on sub-array division

ActiveCN108051782AOvercoming differential beam zero depth sizeOvercome positionWave based measurement systemsNegationArray element
The invention provides a large scale phased array difference beam forming system based on sub-array division, and aims to provide a difference beam forming device that can approach to the performanceof array element level difference beams and mono-pulse tracking precision. The system comprises N*M serially connected radio frequency processing modules corresponding to antenna array elements, a digital pretreatment module, a primary sub-array inner beam forming module, and a secondary difference beam sub-array cross-regional splitting and weighting-synthesizing module. The system comprises a designed azimuth dimension and pitching dimension sub-array cross-regional splitting unit and following cascaded units: a sub-array symmetrical positive azimuth difference beam weighting processing unit, a sub-array symmetrical negative azimuth difference beam weighting processing unit, a sub-array symmetrical positive pitching difference beam weighting processing unit, a sub-array symmetrical negative pitching difference beam weighting processing unit, and an azimuth difference and azimuth difference beam synthesizing unit. An add-subtract treatment is carried out in an azimuth-pitching coordinate area division symmetrical negation mode to obtain the azimuth difference and pitching difference beams.
Owner:10TH RES INST OF CETC

Intelligent target shooting training device

InactiveCN102818482AMeet shooting training requirementsSimple structureMovable targetsComputer scienceIntelligent agent
The invention discloses an intelligent target shooting training device. The intelligent target shooting training device comprises a target machine, an upper computer system and a wireless communication module. The target machine is provided with a lower computer system. The upper computer system controls the lower computer system through the wireless communication module. The lower computer system controls operation of the target machine. According to the intelligent target shooting training device provided by the invention, the target can be manually controlled to move so that the intelligent target shooting training device can meet various shooting training requirements and is simple in structure and strong in reliability so as to solve the technical problems of single function and complex maintenance in the prior art.
Owner:南京优睿创智能科技有限公司

Bovine type-A clostridium perfringens subunit vaccine and preparation method and application thereof

ActiveCN107596361AStrong immune responseOvercoming the problem of incomplete inactivationAntibacterial agentsBacterial antigen ingredientsAntigenAlpha-toxin
The invention provides a bovine type-A clostridium perfringens subunit vaccine and a preparation method and an application thereof. The subunit vaccine comprises a bovine type-A clostridium perfringens alpha-toxin protein truncation body and a pharmacologically acceptable adjuvant. The bovine type-A clostridium perfringens alpha-toxin protein truncation body is an antigen determinant amino acid sequence from 255th to 372nd amino acids of alpha-toxin protein. The subunit vaccine has the following advantages that 1) safety problems due to uncompleted inactivation are not existed; 2) the qualityis controllable, and the difference between the batches is not existed; 3) the production equipment and space requirement is low, the expression level is high, and the cost is low; and 4) toxin dispersion risk is not existed, and the safety of operators can be guaranteed.
Owner:NOVO BIOTECH CORP

Method and device of positioning and displaying active pen

The invention relates to an electronic inputting and displaying method, in particular to a method for positioning and displaying writing of an active pen. The method comprises the following steps of: S10 extracting a light spot image of the active pen and binarizing the light spot image to obtain a target image; S20 calculating by using an SUSAN operator to obtain a first stroke coordinate of the active pen; S30 converting the first stroke coordinate to a screen displaying position coordinate and sending to a computer; and S40 controlling a projector to display the writing track of the active pen by using a computer according to the displaying position coordinate. The method in the invention overcomes the defect that the contact position of the active pen is inconsistent with the screen displaying position. Furthermore, the invention also discloses a positioning and displaying device of the active pen.
Owner:GUANGDONG VTRON TECH CO LTD

Multiple-shaft drill bit machine tool for processing threaded bottom hole in side surface of crank case and processing method thereof

The invention discloses a multiple-shaft drill bit machine tool for processing a threaded bottom hole in the side surface of a crank case and a processing method thereof. The multiple-shaft drill bit machine tool comprises a workpiece mounting table and a multiple-shaft drill head, wherein the crank case is fixed on the workpiece mounting table, and bottom hole drilling is performed to a thread of the side surface of the crank case through the multiple-shaft drill head. The invention provides a production machine tool with a better effect, the defects that position accuracy of drilling the thread of the side surface of a gear case in the conventional production is difficult to ensure, the processing efficiency is low, the labor intensity is large and the like are overcome, the drilling position accuracy is improved and stabilized, the frequency of drilling is reduced, and meanwhile, the multiple-shaft drill bit machine tool can displace manual operation through a numerical control mode, improves the machine productivity, lowers the labor intensity, remarkably improves the whole production efficiency, saves the total cost, and can efficiently propel the development of the prior art.
Owner:GUANGXI QINGLONG MACHINERY MFG

Nondestructive testing method for agricultural product quality indicators

The invention discloses a nondestructive testing method for agricultural product quality indicators. The nondestructive testing method comprises the following steps: Step 1, building a machine visiondetecting platform, and then comprehensively collecting RGB images of agricultural products in a visual sensor; Step 2, carrying out image segmentation on the images collected in Step 1, then dividingregions of agricultural products with interest, and extracting the contours of fruits of the agricultural products; Step 3, with the contours of the fruits of the agricultural products extracted in Step 2, extracting a shape feature vector with a shape invariant feature extraction operator, so as to overcome the problem of different sizes, positions and orientations of the agricultural products;and Step 4, with the images of the agricultural products of different shapes collected in the Step 1 and the feature vector extracted in Steps 2 and 3, training a support vector machine to determine the optimal parameters and the detection accuracy of the support vector machine. According to the invention, the machine vision technology is adopted to realize the non-destructive detection of the quality of agricultural products, and the nondestructive testing method has a very high real-time property, is reasonable and has high detection accuracy.
Owner:SUZHOU POLYTECHNIC INST OF AGRI

Chinese phonetic notation input method and device thereof

InactiveCN101008863AOvercome familiarity with phonetic symbolsOvercome positionInput/output processes for data processingUser inputData treatment
This invention relates to character pinyin input method and its device, which comprises the following steps: designing all characters into relative keys; pressing orderly keys according to characters order; the device determines input pinyin characters inside keys to find out character output and display for database. The invention is characterized by the following: according to sound character pinyin, and second pinyin character original order to design it to each key.
Owner:SUNPLUS TECH CO LTD +1

Self-help eye dropping device

ActiveCN109806064AFixed-point implementationDistance realizationMedical applicatorsEye treatmentEngineeringForehead
The invention relates to a self-help eye dropping device. The self-help eye dropping device comprises a strip-shaped horizontal support plate, wherein a finger coat is fixedly arranged under the frontend of the horizontal support plate and is used for clamping a finger; a vertical connecting part is fixedly arranged above the front section of the horizontal support plate; a hollow hole is formedin the vertical connecting part, and is used for a container nozzle to penetrate through; elastic clamp sheets are arranged above the horizontal support plate, are used for clamping an eye medicine container body, and are matched in a left and right way; the upper end of the vertical connecting part is also connected with a longitudinal connecting part which is in contact with a forehead, and is provided with a Y-shaped clamp arm assembly; the Y-shaped clamp arm assembly comprises a left clamp arm and a right clamp arm, a left clamp block is arranged in the middle part of the left clamp arm, aright clamp block is arranged in the middle part of the right clamp arm, and the left clamp block and the right clamp block are matched in pair to extrude the eye medicine container body. The self-help eye dropping device has the advantages that a patient is assisted to drop the medicines into eyes by self; the fixed-point, fixed-distance and fixed-eye dropping effect is realized; the eye medicine can be accurately dropped to the target position, and the injury to eyes by the container nozzle is avoided.
Owner:汕头大学·香港中文大学联合汕头国际眼科中心

Novel rod-like omni-directional luminous light emitting diode (LED) illuminating lamp

The invention discloses a novel rod-like omni-directional luminous light emitting diode (LED) illuminating lamp. The illuminating lamp comprises a luminous main body, wherein the luminous main body is a solid light guide rod which can emit light in all directions, and the outer surface of the luminous main body is a rough surface; and a light guide transparent glass housing is sleeved outside the luminous main body and is matched with the luminous main body in length. The LED illuminating lamp can realize diffuse scattering of light in all directions, and has a simple structure and a wide application range, is low in cost and convenient to maintain, and can conduct and dissipate heat quickly.
Owner:刘雪峰

Magnetic attraction module, magnetic attraction assembled plate and magnetic attraction charging base

The invention relates to a magnetic attraction module. The magnetic attraction module comprises a male head side magnetic attraction module arranged on mobile charging equipment, and a female head side magnetic attraction module arranged on mobile terminal equipment, wherein the male head side magnetic attraction module and the female head side magnetic attraction module are used for magnetic attraction positioning between the mobile charging equipment and the mobile terminal equipment to realize power transmission; the male head side magnetic attraction module comprises first magnets, and male head side magnetic attraction module positive and negative electrode contacts which are fixedly connected with the first magnets; the female head side magnetic attraction module comprises second magnets, and female head side magnetic attraction module positive and negative electrode contacts which are fixedly connected with the second magnets; a power supply positive electrode inside the mobile charging equipment is connected to the male head side magnetic attraction module positive electrode contact, and a power supply negative electrode inside the mobile charging equipment is connected to the male head side magnetic attraction module negative electrode contact; a power supply positive electrode inside the mobile terminal equipment is connected to the female head side magnetic attraction module positive electrode contact, and a power supply negative electrode inside the mobile terminal equipment is connected to the male head side magnetic attraction module negative electrode contact; the male head side magnetic attraction module positive and negative electrode contacts as well as the female head side magnetic attraction module positive and negative electrode contacts are correspondingly arranged; and the first magnets and the second magnets are correspondingly arranged and magnetically attracted.
Owner:深圳声光世界科技有限公司

Automatic extraction method for block adjustment connection points of SAR image

The invention provides an automatic extraction method for block adjustment connection points of an SAR image, and the method comprises the steps: obtaining a corrected SAR image; generating ground grid points according to the geographic coordinates and external auxiliary topographic information of the corrected SAR image, and calculating the corresponding image points of the ground grid points on the corrected SAR image; cutting out a group of corresponding image blocks from the corrected SAR image, selecting one corresponding image block from the group of corresponding image blocks as a reference image block, and extracting points with the maximum interest value from the reference image block, wherein the points with the maximum interest value serves as matching reference points; searching the corresponding image point of each matching reference points from the corresponding image block, and obtaining corresponding connection points between corrected SAR images; enabling the corresponding connection points between corrected SAR images to be converted to a raw SAR image, and obtaining the block adjustment connection points of the SAR image. The method improves the automation degree of the block adjustment of the SAR image, and improves the production efficiency of SAR topographic mapping.
Owner:CHINESE ACAD OF SURVEYING & MAPPING

Lampwick type water supply garden rain collector

The invention provides a novel garden plant rain collector - a lampwick type water supply garden rain collector. The rain collector is composed of a rain-collecting funnel, a filter screen mask, a water inlet moving tongue, a water-accumulating bottle and a lampwick type feeding pipe. The rain-collecting funnel collects rainwater or earth surface runoff, and the rainwater or the earth surface runoff flows into the water-accumulating bottle through a central hole, a filtering funnel prevents ground impurities or rubbish from blocking a bottle opening, the moving tongue prevents moisture from being evaporating and lost through the bottle opening, the water-accumulating bottle accumulates the rainwater; and the lampwick type feeding pipe slowly feeds water in the water-accumulating bottle to trees through a penetration theory. The rain collector is very wide in applied range and has remarkable application effects in arid regions and regions where there is much rain but the seasonal distribution of rainfall is uniform, and has remarkable application effects on newly-planted trees, surviving grown-up trees, arbors or shrubs, and has remarkable application effects on garden plants or afforestation plants or fruit trees.
Owner:重庆市涪陵区妍艺园林绿化有限公司

Method and device of image automatic calibration and optimization in light recycling three-dimensional (3D) projection system

The invention discloses a method and a device of image automatic calibration and optimization in a light recycling three-dimensional (3D) projection system. The method of the image automatic calibration and optimization in the light recycling 3D projection system comprises the following steps: (1) shielding a lower optical path, outputting an upper optical path, reducing a projection ratio automatically, enabling a collected image to be capable of filling a whole screen, adjusting a focal length, and adjusting the positions and heights of an X axis, a Y axis and an electronic support; (2) shielding the upper optical path, outputting the lower optical path, adjusting the collected image to magnify the image or reduce the image to enable the size of the optical paths to be identical. The device of the image automatic calibration and optimization in the light recycling 3D projection system comprises an image collecting and analyzing device, an image automatic calibration and optimization device and a projection device controlling and calibrating device. The method and the device of the image automatic calibration and optimization in the light recycling 3D projection system have the advantages of greatly reducing investing cost of a 3D movie projection system, reducing repairing and maintenance cost of devices in a later period, and effectively improving the adjusting accuracy of the 3D movie projection images.
Owner:雷欧尼斯(北京)信息技术有限公司

Release armature of an electromagnetic release

The invention relates to a release armature of an electromagnetic release, which is used in a circuit breaker. The release armature of an electromagnetic release comprises an armature basal body made of an iron magnetic material and a push rod, wherein the push rod is screwed on the armature basal body in a thread way and passes through the armature basal body, a soft ring is fixed on the end part of the armature basal body and connected with the armature basal body into a whole, and the internal hole of the soft ring is a little smaller than the diameter of a screw rod on the push rod to enable the thread on the push rod to be screwed into the soft ring and tightly packed by the internal hole of the soft ring to prevent the push rod from easily rotating, the soft ring is made of plastic or rubber, and the soft ring is fixedly embedded on the end part of the armature basal body. After the push rod with a thread is screwed into the armature basal body, the invention guarantees the position of the push rod to be set by regulation, and the set position of the push rod can not automatically change caused by vibration in work.
Owner:SHANGHAI RENMIN ELECTRICAL APP WORKS

Chirped pulse compression device and laser

PendingCN113904209AImprove gate utilizationIncreased gate utilizationLaser detailsGratingRoof prism
The invention provides a chirped pulse compression device and a laser. The chirped pulse compression device comprises the following components: a translation roof prism and a grating which are spaced oppositely, wherein all angles are arranged in a total reflection manner; and a reflector assembly which comprises a plurality of reflectors which are all located between the grating and the translation roof prism; wherein after incident light is emitted to the grating, the incident light is diffracted by the grating to form first light which is emitted to the reflector assembly along a first direction, and the first light is reflected back to the reflector assembly after being reflected by the reflector assembly for multiple times and translated by the reference surface position of the translational roof prism, and then is reflected for many times; and the light returns and enters the grating along the direction symmetrical with the first direction relative to the normal direction, and then is subjected to secondary diffraction by the grating to form a second light meeting the grating diffraction condition. The chirped pulse compression device provided by the invention can improve the utilization rate of the grating region and increase the compressible pulse width so as to improve the pulse output single pulse energy and reduce the cost.
Owner:深圳市欧凌镭射科技有限公司

BIM optimization design method based on tunnel main body structure special-shaped steel bars

The invention discloses a BIM optimization design method based on tunnel main structure special-shaped steel bars. The BIM optimization design method comprises the following steps: exporting a tunnel main structure model in an IFC format through BIM software and importing the tunnel main structure model into steel bar design software Planbar; creating a model view to determine the line shape of the tunnel main structure; extracting a model shell from the tunnel main body structure model, and normally deviating the distance of the thickness of the protective layer to determine the steel bar trend; segmenting the main body structure according to the distribution spacing of the reinforcing steel bars, and performing curve fitting through origin pro8.0; and generating and placing the reinforcing steel bars according to a command of generating the reinforcing steel bars by Planbar software according to a 3D line. The problem that the shape of the special-shaped steel bar is difficult to determine can be effectively solved, the design efficiency is improved, the design modification and auditing time is shortened, rework caused by inconformity of the steel bar size frequently occurring in the construction process is avoided, the steel bar machining precision is improved, and the construction period and cost are greatly saved.
Owner:SOUTHEAST UNIV

Network computer room circulating mobile monitoring device

The invention provides a network computer room circulating mobile monitoring device which includes a first crossbeam and a second crossbeam which are arranged in parallel. The first crossbeam and thesecond crossbeam are fixedly connected to the top of a computer room through lifting structures, sliding rails are fixedly installed on the tops of the first crossbeam and the second crossbeam in parallel through cushion blocks, the sliding rails are provided with a top plate in a sliding fit manner, the bottom end of the top plate is provided with a monitoring cabinet for mounting monitoring equipment, a transmission mechanism installation box is installed on the side wall of the transmission mechanism, and a power device for driving the entire top plate to slide along the slide rails is installed inside the transmission mechanism installation box. The monitoring device can move within a certain range of the computer room area, can further cover the entire computer room, effectively overcomes monitoring blind spots and monitoring dead-end positions, and greatly enhances the operating safety of the computer room.
Owner:CHINA THREE GORGES UNIV

Stepless adjustable apparatus for adjusting probe position of epitaxial wafer temperature measurer

The invention discloses a stepless adjustable apparatus for adjusting a probe position of an epitaxial wafer temperature measurer. The apparatus comprises a detection port flange cover, a probe installation seat, a probe adjusting rack, a probe adjusting screw rod, and a screw rod installation plate. The detection port flange cover is installed at the top of an MOCVD reaction chamber; and an observation window is formed in the detection port flange cover. The probe installation seat is installed on the detection port flange cover in a sliding mode and can slide freely at a length direction of the observation window. A temperature measurer probe is installed on the probe installation seat vertically; a through hole with internal threads is formed in the probe adjusting rack, wherein the intenral threads of the through hole match the probe adjusting screw rod. The probe adjusting rack and the probe installation seat are fixedly connected; and the screw rod installation plate is installed on the detection port flange cover vertically. One end of the probe adjusting screw rod passes through the screw rod installation plate horizontally and then extends into the through hole of the probe adjusting rack and, together with the probe adjusting rack, forms a nut lead screw mechanism. With the apparatus, precise stepless adjustment of the temperature measurer installation position can be realized effectively.
Owner:ZHONGSHAN DEHUA CHIP TECH CO LTD

Cement-based material anti-cracking performance quick testing device with round outside and square inside

The invention discloses a cement-based material anti-cracking performance quick testing device with a round outside and a square inside. The device comprises a stepped bottom plate, an annular outer formwork and a square inner steel die are concentrically arranged on the stepped bottom plate from outside to inside, an induced cracking component is fixedly arranged on the peripheral wall of the square inner steel die and comprises two annular ribbed rebars, and the annular ribbed rebars are parallelly fixed on the peripheral wall of the square inner steel die. The device is simple in structure,convenient to operate and can accelerate forming of a first crack so as to shorten testing period, timeliness of the device is improved, test piece cracking position can be determined, and accuracy of the device is improved; the problem that existing circular anti-cracking devices are generally long in testing period, random in cracking position and difficult in observing cracks is solved.
Owner:SOUTH CHINA UNIV OF TECH

Centralized DC street lamp system and control method thereof

The invention provides a centralized DC street lamp system and a control method thereof. The system comprises a centralized controller and a plurality of street lamp units. Each of the street lamp units comprises a driver and a street lamp. In each street lamp unit, the driver is connected to the street lamp and controls the street lamp, wherein each driver comprises a first address and a driver which is only corresponding to the first address, the centralized controller is connected to each driver and stores each first address, and the centralized controller sends a control command comprising the first address corresponding to a driver to be controlled to each driver. According to the system and the method, the single lamp control, partition control and integral control can be realized, the purpose of convenient street lamp management is achieved, and the system is not limited by the communication distance of communication modules such as a traditional Zigbee and a PLC.
Owner:DELTA GREENTECH CHINA CO LTD

Semiconductor material cutting device

The invention relates to a semiconductor material cutting device for cutting a semiconductor strip into individual semiconductor packages. The present invention in particular relates to a semiconductor material cutting device with improved accuracy which is capable of automatically determining whether to elevate an interlock pin to correct positional error of a semiconductor strip as required whenthe semiconductor strip is picked up from a loading part by a strip picker or unloaded to a chuck table by the strip picker.
Owner:HANMI SEMICON CO LTD

Manufacturing method of high-light-concentration high-resolution variable-conical-surface bent crystal

ActiveCN113447508AOvercome theoretical phase aberrationsOvercome positionMaterial analysis using wave/particle radiationWaferingCrystal spectrometer
The invention discloses a manufacturing method of a high-light-concentration high-resolution variable-conical-surface bent crystal, belongs to the technical field of optical crystal manufacturing, and solves the problems that a simple conical surface has theoretical phase aberration and a detection surface of a cylindrical crystal spectrometer can only be located at the position of a central axis of a cylindrical surface. The manufacturing method comprises the following steps: S1, modeling: modeling by adopting three-dimensional software; S2, wafer manufacturing: directionally cutting the alpha quartz crystal wafer by using an X-ray direction finder, polishing a first surface, and polishing a second surface after polishing; S3, bending a crystal substrate: processing by adopting a quartz material; S4, measuring surface precision: using a three-coordinate machine with the precision of 1 [mu]m for measurement; S5, manufacturing a surface type keeping and positioning pressing block: manufacturing a standard pressing block which is the same as the bent crystal in external dimension, the same as the bent crystal in reflecting surface type and opposite in concave-convex by using a quartz material; and S6, sizing and gluing, wherein the curved crystal face type after gluing is completed is completed through the face type of the face type maintaining and positioning pressing block. The remeasurement precision of the manufactured variable-conical-surface bent crystal is less than or equal to 5 [mu]m, and the precision is high.
Owner:四川欧瑞特光电科技有限公司

Computer keyboard key socket and keyboard with same

The invention relates to a computer accessory, in particular to a computer keyboard key socket and a keyboard with the computer keyboard key socket. The computer keyboard key socket and the keyboard aim to overcome the defects that the number of the keys of an existing computer keyboard is large, the keys are arranged densely, the keyboard is only suitable for being operated with the two hands, and the positions of the functions of the keys cannot be changed freely according to the personal habits of users. According to the computer keyboard key socket and the keyboard with the socket, a keyboard circuit foundation is reserved, DC inserting holes are additionally formed between the keys and a circuit, and then the keys and a circuit board are connected through a plug. In the actual application process, the keys needing to be used are connected with the circuit board, the structure, shape and combination of the keys can be changed according to the using habits of the users, the keys are increased and reduced reasonably, and therefore the aim of being suitable for being used by various users is achieved. The computer keyboard key socket and the keyboard with the socket are suitable for the field of keyboard manufacturing.
Owner:雷泽峰

A laser plus ccd collimation positioning device and method

The invention discloses a laser and CCD (Charge-coupled Device) alignment positioning device and a method thereof. The device comprises a large target chamber, a small target chamber and a T3 target chamber. The large target chamber and the T3 target chamber are connected through a beam pipeline. The T3 target chamber and the small target chamber are connected through the beam pipeline. The large target chamber is provided with a sample rack. An alignment telescope is provided behind the large target chamber. The device is provided with a laser and a CCD simultaneously. The laser is installed in the small target chamber in a mode of fixed eccentricity. The CCD is installed above an inlet of the large target chamber through a CCD rack. With combination use of the laser and the CCD, a centring operation is more accurate, a visual angle position deviation problem in individually using the CCD is solved; since a laser brightness adjust function is added, a laser point can be easily viewed even brightness of the large target chamber is different. By using the laser and CCD alignment positioning device in the invention to carry out alignment positioning, an electric translation stage is avoided, a fault incidence rate is decreased, disadvantages of large position deviation and the like caused by complex machinery structure and angle in a previous laser centring method are overcame.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY

Active noise reduction strategy and system for fixed sound characteristic noise source

The invention discloses an active noise reduction strategy and system for a fixed sound characteristic noise source, and relates to the field of sound processing. The active noise reduction strategy sequentially comprise a noise analysis and secondary sound source construction stage, an installation and working stage and an evaluation and adjustment stage, wherein the evaluation and adjustment stage feeds back information to the installation and working stage. A noise receiving and noise reduction effect evaluation assembly is used for receiving noise emitted by a noise source, analyzing the received noise by using a sound analysis program to obtain sound characteristics, and then producing secondary sound with complementary phases; a secondary sound source assembly executes a pre-designed scheme according to a control program, emits a secondary sound wave with a specific frequency and a sound pressure level at a specific time, is used for counteracting noise emitted by the noise source in a specific propagation direction, is connected to a controller of the noise source, and operates together with the noise source; and a passive noise reduction assembly is used for absorbing superposed sound waves of the noise source and the secondary sound source in the direction opposite to the noise propagation direction. The device has a good noise reduction effect.
Owner:JIANGSU UNIV

Roadbed dynamic displacement determination method based on dynamic stress and vibration displacement time history signals

The invention discloses a roadbed dynamic displacement determination method based on dynamic stress and vibration displacement time history signals. The roadbed dynamic displacement determination method comprises the following steps that S1, roadbed dynamic stress time history signals and roadbed vibration displacement time history signals caused by train operation are collected; s2, obtaining a roadbed dynamic stress normalization time history curve and a roadbed vibration displacement normalization time history curve; s3, acquiring a lower envelope curve and an upper envelope curve; s4, determining a roadbed dynamic displacement time history curve; and S5, determining a railway roadbed dynamic displacement value. According to the method, on the basis of an actually measured roadbed dynamic stress time-history curve and a roadbed vibration displacement time-history curve, a roadbed dynamic displacement time-history curve is obtained through correction by using a signal processing technology, a sensor used for testing is directly placed at a measuring point part, and additional fixed points and rigid supports do not need to be selected; the contradiction between the position of a fixed point and the size of the rigid bracket caused by the limitation of the environment in the existing test method is overcome.
Owner:SOUTHWEST JIAOTONG UNIV

Vehicle re-identification method based on capsule network

The invention relates to a vehicle re-identification method based on a capsule network, and the method comprises the steps: obtaining a vehicle image data set, and dividing the vehicle image data set into a training set and a test set; constructing a capsule network model for vehicle re-identification; optimizing the capsule network model through a vehicle image in a training set; inputting a to-be-identified vehicle image and a vehicle image in a test set into the optimized capsule network model: firstly calculating feature vectors of the to-be-identified vehicle image and the vehicle image in the test set, then comparing the feature vectors of the to-be-identified vehicle image and the vehicle image in the test set, and calculating corresponding similarity; and finally, outputting a matching result according to high-low ranking of the similarities. According to the vehicle re-identification method based on the capsule network, the problems that a convolutional neural network cannot extract spatial position information and feature vectors are not aligned during feature matching can be effectively solved, so that the identification precision of vehicle re-identification can be improved.
Owner:CHONGQING JIAOTONG UNIVERSITY
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