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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

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

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

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

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

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

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

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

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

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
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