Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

73results about How to "Realize automatic calibration" patented technology

Gas source purity detection device and gallium nitride production system

The invention relates to the technical field of gas purity detection, in particular to a gas source purity detection device and a gallium nitride production system. The gas source purity detection device comprises a main pipe body, a supporting piece, a control ring, a moving arm and a concentration sensor. The main pipe body is used for being connected with an air source pipeline. The control ring is rotationally matched with the supporting piece and driven by the driver, and the control ring and the outer wall face are rotationally sealed. A gas collecting groove is formed in the inner ring wall of the control ring. The supporting piece is provided with a mounting blind hole, and the moving arm is slidably matched with the mounting blind hole and is slidably sealed. A first elastic piece is connected between the moving arm and the hole bottom wall of the mounting blind hole in an abutting mode. The concentration sensor is arranged on the outer side wall of the moving arm. When the control ring rotates, the gas collecting groove can periodically communicate with the main pipe body and can also periodically move to the moving arm. The gas source purity can be continuously and accurately detected for a longer time, and automatic calibration is achieved while purity detection is conducted.
Owner:YAAN YUKUN CORE MATERIAL TECH CO LTD

Digital pressure gauge error automatic calibration method, device, equipment, medium and product

The invention relates to the technical field of automatic control of instruments and meters, and discloses a digital pressure gauge error automatic calibration method, device and equipment, a medium and a product, and the method comprises the steps: obtaining a plurality of gauge detection points of a digital pressure gauge; testing the pressure value of each meter checking point to obtain an original pressure value and a standard pressure value; calculating a first measurement error and a corresponding correction coefficient of each meter detection point based on the original pressure value and the standard pressure value of each meter detection point, and performing automatic calibration according to the correction coefficient; and calculating a second measurement error based on the correction coefficient, and comparing with the second measurement error according to a preset precision requirement to judge a pressure detection result. The process of manual detection, calculation and automatic calibration of the digital pressure gauge is omitted, the rationality and accuracy of the detection process are enhanced, and automatic calibration and accurate judgment of the pressure detection result in the factory production link of the digital pressure gauge are realized.
Owner:ZHEJIANG CHINT INSTR & METER

Unmanned aerial vehicle route planning and pose calibration method and system

The invention provides an unmanned aerial vehicle route planning and pose calibration method and system, and belongs to the technical field of unmanned aerial vehicle control based on computer vision. In the flight process of the unmanned aerial vehicle, a track picture is obtained every time the unmanned aerial vehicle reaches a specified waypoint, the vertical distance between the position and a track line is recognized and calculated, whether the unmanned aerial vehicle is within an error distance or not is judged, that is, whether the unmanned aerial vehicle yaws or not is judged, and if yes, the unmanned aerial vehicle is corrected to the correct position; if not, whether the waypoint is the last waypoint or not is judged, if not, the unmanned aerial vehicle continues to fly to the next waypoint, and if yes, the unmanned aerial vehicle stops advancing and arrives at the terminal point. According to the invention, track identification is optimized, and the track identification accuracy is improved; an unmanned aerial vehicle route is drawn through a track line, external factors such as a map and a train timetable are comprehensively considered, and the optimal unmanned aerial vehicle route is drawn under the condition that the lowest cost is guaranteed; automatic track calibration of the unmanned aerial vehicle in the air is achieved, and therefore errors in the flight process are reduced.
Owner:BEIJING JIAOTONG UNIV

Camera parameter calibration method and device and control equipment

The invention provides a camera parameter calibration method and device and control equipment. The method comprises the steps that multiple initial expected poses of a mechanical arm are determined based on initial camera parameters of a camera; aiming at each initial expected pose, controlling the mechanical arm to move the calibration plate based on the initial expected pose, and collecting a first calibration image aiming at the calibration plate through the camera; determining candidate camera parameters of the camera based on the first calibration images corresponding to the plurality of initial expected poses; determining a plurality of target expected poses of the mechanical arm based on the candidate camera parameters; wherein the multiple target expected poses are used for determining target camera parameters and calibrating the target camera parameters. According to the technical scheme, automatic calibration of the camera parameters can be realized.
Owner:HANGZHOU HIKROBOT TECH CO LTD

A calibration device and method for a variable head water flow standard device

The present invention belongs to the technical field of flow calibration, and discloses a calibration device for a variable head water flow standard device, including a pressure-stabilizing water tower, the pressure-stabilizing water tower is connected with a standard flow meter, a water pump, a water weighing device and a water tank, and a variable head water flow standard device to be calibrated through a water direction regulating module, the water direction regulating module, the standard flow meter, the water weighing device, and the variable head water flow standard device to be calibrated are all connected with a processor, and the processor controls the flow direction of liquid water between the pressure-stabilizing water tower, the standard flow meter, the water pump, the water weighing device and the water tank, and the variable head water flow standard device to be calibrated through the water direction regulating module, first completes the calculation of the instrument coefficient or flow correction value of the standard flow meter, and then completes the volume calculation of each volume section of the volume section water tower in the variable head water flow standard device to be calibrated, thereby realizing automatic calibration of the variable head water flow standard device to be calibrated. A calibration method for a variable head water flow standard device is also disclosed.
Owner:SHANGHAI INST OF MEASUREMENT & TESTING TECH

Robot tool coordinate system calibration apparatus and method

The application provides a robot tool coordinate system calibration device and method. The robot tool coordinate system calibration device comprises a control device configured to be in communication connection with a robot; a laser device, the laser device comprising a laser emitting module and a laser receiving module, both of which are in communication connection with the control device, the laser emitting module being configured to be capable of forming a cross-shaped laser beam, the laser receiving module being capable of receiving the cross-shaped laser beam, two first laser beams forming the cross-shaped laser beam being perpendicular to each other. The technical scheme of the application can solve the problem of low calibration accuracy and efficiency of the calibration mode of the prior art.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI

Industrial mechanical arm automatic calibration method and system based on depth camera

The invention relates to the technical field of industrial automation, in particular to an industrial mechanical arm automatic calibration method and system based on a depth camera, and the system comprises a mechanical arm, the depth camera, a recognition patch and a controller. The method comprises installing a depth camera at the tail end of the mechanical arm; pasting an identification patch on the standard position of the target object; the depth camera collects RGB images and depth information; the data processing module extracts linear features through Hough transformation; calculating a spatial analytic expression of the straight line by utilizing the spatial geometrical relationship and the depth information; reversely solving the spatial position and attitude of the tail end of the mechanical arm by using the solved linear spatial analytic expression, and estimating errors in all directions; according to errors in all directions, the position of the next step of the mechanical arm is adjusted through a path planner on the controller; and the DH coordinate system of the mechanical arm is used for calculating the overall accurate position and posture of the mechanical arm. Compared with the prior art, the positioning precision is improved, the automation degree is improved, and the time consumption of positioning is reduced.
Owner:WUHU STATE-OWNED FACTORY OF MACHINING

Medicine amount adjusting method and device, storage medium and electronic device

The embodiment of the invention provides a drug amount adjusting method and device, a storage medium and an electronic device.The method comprises the steps that a target auditing unit included in auditing units used for checking drugs is determined, the target to-be-checked workload of the target auditing unit is smaller than other to-be-checked workloads of other auditing units except the target auditing unit in the auditing units; a target auditing unit is controlled to determine to-be-adjusted drugs with target doses not meeting the target doses in the prescriptions corresponding to the drug containers, wherein the target doses are included in the drug containers; and adjusting the target dose of the to-be-adjusted medicine in the medicine container according to the target dose. By means of the method and device, the technical problem that in the prior art, the medicine amount adjusting efficiency is low can be solved, and the effect of improving the medicine amount adjusting efficiency is achieved.
Owner:CHENGDU YH INTELLIGENT EQUIP TECH CO LTD

Automatic calibration method for voltage type pedal of mining dump truck

PendingCN121898798AMeet automatic calibrationMeet computing tasksVehicle testingMachine part testingControl systemSimulation
The invention discloses a mining dump truck voltage type pedal automatic calibration method which comprises the following steps: a control system enters a calibration mode, and a position sensor signal value of a pedal at an initial position is recorded; according to the change of the collected sensor signal value, the characteristic that the position sensor signal increases / decreases along with the increase of the pedal angle is identified, and the boundary value of the position sensor signal is updated and temporarily stored; the obtained pedal position boundary value is judged, and an effective boundary value is stored in a nonvolatile memory; a conversion calculation model is established by utilizing the effective pedal position boundary value, a corresponding percentage is calculated by utilizing the conversion calculation model, and a control system calibrates or calibrates the opening and closing angle of the pedal according to the percentage. According to the method, automatic calibration and calculation tasks of different types of voltage type accelerators and brake pedals in various scenes can be met.
Owner:INNER MONGOLIA NORTH HAULER

Wave number correction device for confocal microscopic Raman spectrometer

ActiveCN224216557UNot affected by accuracyachieve calibrationRaman scatteringRayleigh scatteringGrating
The utility model provides a confocal microscopic Raman spectrometer wave number correction device, and belongs to the technical field of Raman spectrum detection. The correction device comprises a laser used for emitting laser; the lens assembly comprises a plurality of lenses, and the lens assembly is used for collimating and focusing the laser; the reflector assembly comprises a plurality of reflectors, the plurality of lenses and the plurality of reflectors are alternately arranged, and the reflector assembly is used for adjusting the light path direction of the laser; the attenuation sheet is arranged on a reflection light path in the reflector assembly and is used for attenuating the energy of the laser; the slit is arranged at a confocal position in the lens assembly, and the slit is used for screening Rayleigh scattering light in the attenuated laser; wherein the reflector assembly reflects the Rayleigh scattering light to the rotating grating assembly in the spectrometer. The correction device realizes a convenient and fast calibration process, and improves the calibration precision.
Owner:OPTOSKY (XIAMEN) PHOTONICS INC

Dual-mode interactive projection equipment

ActiveCN224190386Uincrease profitRealize finger touch functionProjectorsCamera body detailsToggle switchCamera module
The utility model discloses dual-mode interactive projection equipment, which comprises a projector main body, an Android system mainboard and an interactive camera module are arranged in the projector main body, a USB toggle switch and external interfaces are arranged outside the projector main body, the external interfaces comprise an HDMI input interface and a USB output interface, and the HDMI input interface is connected with the USB output interface. The USB toggle switch is electrically connected with the Android system mainboard, the interactive camera module and the USB output interface, and through the design of the USB toggle switch, the switching of the interactive camera module between the Android mainboard and the external Windows computer is realized through the simple toggle switch; the technical problem that an existing Android interactive projector cannot use an interactive function when being connected with a Windows computer is solved, one piece of equipment supports the Android mode and the Windows mode at the same time, dual purposes of one piece of equipment are achieved, and the equipment utilization rate is increased.
Owner:HUNAN TOP SMART TECH CO LTD

Wafer code reading method and system based on intelligent enhancement and dynamic optimization

The invention relates to the field of wafer code reading, and provides a wafer code reading method and system based on intelligent enhancement and dynamic optimization, and the method comprises the steps: firstly obtaining a wafer character image, and carrying out the image quality evaluation and image preprocessing; then, the preprocessed wafer character image is input into a deep transfer learning character large model for wafer character recognition, a wafer character recognition result and recognition confidence are obtained, and the model structure of the deep transfer learning character large model comprises a double-branch convolutional neural network and a Transform fusion framework; an incremental learning mechanism is introduced for abnormal sample learning; and finally, according to the wafer character recognition result and the recognition confidence coefficient, performing verification through a checksum algorithm, and judging whether a wafer code is directly obtained or a wafer character image corresponding to the wafer character recognition result is marked as an abnormal sample. According to the method, the accuracy, the adaptive capability and the engineering availability of a wafer code reading system in a semiconductor production environment can be remarkably improved.
Owner:SITUO (SUZHOU) IND AUTOMATION CO LTD

Nuclear power plant maintenance work order automatic checking method, system, medium and device

The present application relates to a nuclear power plant maintenance work order automatic checking method, system, medium and equipment, comprising: receiving the automatic checking instruction of the maintenance work order; determining the to-be-checked work order according to the automatic checking instruction; obtaining the work order data of the to-be-checked work order; automatically checking the work order data of the to-be-checked work order based on intelligent diagnosis rules; outputting the automatic checking result and visualizing the display. Through the present application, the automatic checking of the maintenance work order can be realized, the preparation engineer can be liberated from a large number of repetitive work, not only the human error and risk of the maintenance work order checking can be greatly reduced, but also the work efficiency can be significantly improved, and the work order preparation quality can also be improved.
Owner:YANGJIANG NUCLEAR POWER

Cold atomic group parameter automatic calibration simulation system and method based on artificial intelligence

The invention discloses a cold atomic group parameter automatic calibration simulation system and method based on artificial intelligence, and belongs to the field of artificial intelligence. Comprising the following steps: constructing a cold atomic group database, extracting historical data of a calibrated cold atomic group image, constructing a cold atomic group standard set, and calculating an average pixel value of all cold atomic groups in the cold atomic group standard set; extracting an initial image of the cold atomic group shape set, calculating a center coordinate of a to-be-detected sample, constructing a cold atomic group similar model, marking the to-be-detected sample as a cold atomic group when the maximum similarity between the to-be-detected sample and the cold atomic group in the cold atomic group standard set is greater than or equal to a threshold value, and calibrating the number of the cold atomic groups; based on the cold atomic group image data, the average speed of the cold atomic group is calculated, and the temperature of the cold atomic group is calibrated; the automatic calibration of the cold atomic group parameters is realized, the accuracy of cold atomic group parameter detection is improved, and the experiment time is greatly saved.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1

Device for detecting cleanliness on line based on ultraviolet fluorescence method

ActiveCN224176398UReal-time monitoring of cleanliness statustimely feedbackFluorescence/phosphorescenceEngineeringUltraviolet fluorescence
The utility model relates to the technical field of cleanliness detection, in particular to a device for detecting cleanliness on line based on an ultraviolet fluorescence method. The device for online detection of the cleanliness based on the ultraviolet fluorescence method comprises a measurement module; the measurement module comprises a light path module and a calibration module; the calibration module comprises a stepping motor, a standard sample bracket and a position detection sensor; the stepping motor is connected with the standard sample bracket and drives the standard sample bracket to rotate, and the standard sample bracket comprises a plurality of cleanliness sample bracket units and channels arranged among the cleanliness sample bracket units; and the position detection sensor is arranged on the standard sample bracket. The light path module carries out detection by adopting an ultraviolet fluorescence method, has high sensitivity to common pollutants such as oil stains and organic impurities on the metal plate strip, can accurately detect trace pollutants, and improves the precision of cleanliness detection.
Owner:EMG AUTOMATION BEIJING LTD

A large model-based PDD file intelligent preparation and verification method and system

The application relates to the field of artificial intelligence and document intelligent processing technology, and discloses a PDD file intelligent compiling and checking method and system based on a large model. The method extracts clauses, formulas and parameters in an original methodology file, constructs a basic associated knowledge graph, and converts conditional clauses into first-order logic predicates; combined with project characteristics, satisfiability is determined to obtain document generation constraints; based on a PDD template, graph node data and project parameter instances, an initial document is generated by constructing a structured prompt word, and a bidirectional anchoring relationship between a document instance and clause, formula and parameter nodes is established to form a five-layer associated knowledge graph; based on the graph, dimensional self-consistency checking and coverage completeness verification are performed, and when the methodology version is updated, subgraph difference analysis and influence propagation are used to locate the affected document content, so that the logical consistency and traceability of PDD file compiling, checking and maintenance are improved.
Owner:HUAJUN TECHNOLOGY (CHONGQING) CO LTD

Method and apparatus for initial pose calibration of continuum robots

This application discloses a method and apparatus for initial pose calibration of a continuum robot. The initial pose calibration method includes: acquiring ideal current data of a drive motor when the continuum robot is in an ideal initial pose, wherein the drive motor is used to drive multiple drive ropes included in the continuum robot; constructing an ideal current range based on the ideal current data; and controlling the rotation of the drive motor based on an initial pose calibration algorithm, such that the initial current data of the drive motor obtained through rotation is located within the ideal current range, thereby completing the initial pose calibration of the continuum robot, wherein the initial pose calibration algorithm is created based on the ideal current range and a successive approach strategy.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

Information processing method and device, electronic equipment and computer readable storage medium

The invention provides an information processing method and device, electronic equipment and a computer readable storage medium, which can be applied to the technical fields of computers and internet. The information processing method comprises the following steps: in response to a received information processing request, performing attribute verification on a source object in the information processing request according to source object attribute information to obtain a source object verification result; the source object verification result is responded to represent that the source object passes the attribute verification, the source object is processed according to a preset mapping relation, at least one target key value relation is obtained, and the target key value relation comprises target key information and target value information corresponding to the target key information; according to the target object attribute information, processing the at least one piece of target key information and target value information corresponding to the at least one piece of target key information to obtain a target object; the source object attribute information, the predetermined mapping relation and the target object attribute information are determined according to the service identifier.
Owner:BEIJING JINGDONG QIANSHITECHNOLOGY CO LTD

Data processing method and system

The present disclosure provides a data processing method and system, which relates to the field of electronic information technology and can solve the problem of data processing efficiency. The specific technical solution is: by matching the structural parts and the acquisition port during the aircraft structure strength test data acquisition process, the automatic identification of the test data and the automatic calibration of the acquisition equipment are realized, and the test process is simplified, and the work efficiency and test quality are improved.
Owner:XIAN FARADAY ELECTRONICS TECH

An automatic calibration system for the perfusion and push injection modules of a urodynamic analyzer

The invention discloses an automatic calibration system for the infusion and push modules of a urodynamic analyzer, comprising a urine flow module, a push module, an infusion module, a liquid storage bottle, and a controller; a urine flow detection submodule reads the infusion and push rates in real time through a liquid path connection, and the controller automatically adjusts the rotation speed of the infusion pump and the push pump through the rate feedback of the urine flow detection submodule. The automatic calibration system for the infusion and push modules of a urodynamic analyzer solves the technical problems that the urodynamic analyzer needs manual operation, is time-consuming and labor-intensive, and is prone to human errors, improves calibration efficiency and calibration accuracy, and reduces time and labor costs.
Owner:CHENGDU WEIXIN ELECTRONICS KEDA NEW TECH CO LTD

Automatic cleaning and maintenance control method and system for water quality monitoring equipment and medium

The invention discloses an automatic cleaning and maintenance control method and system for water quality monitoring equipment and a medium, and belongs to the field of water quality monitoring. The method comprises the steps that pure water generated by a built-in pure water production assembly of equipment serves as a measurement anchor point, and whether sensors are normal or not is judged on the basis of comparison results of detection numerical values of the sensors in a pure water environment and a preset pure water threshold value; monitoring operation state parameters of the pure water production assembly, and dynamically adjusting and updating the pure water threshold value corresponding to each sensor; when the value of the sensor deviates from the threshold value, first-stage pure water flushing is executed; if not, second-stage maintenance is started according to the sensor type, the optical sensor performs optical path self-cleaning or backwashing, and the electrochemical sensor performs electrode cleaning; and detecting again after maintenance, and locking the sensor and generating a fault alarm if the sensor is still not recovered. Through dynamic threshold configuration, progressive maintenance and sensor adaptive cleaning, the problems of reference drift and deep pollution are solved, the data credibility is improved, and the operation and maintenance cost is reduced.
Owner:NANJING YIMU INTELLIGENT TECHNOLOGY CO LTD +1

Automatic error detection and correction method and system for mass electrical interconnection design and readable storage medium

The invention discloses an automatic error detection and correction method and system for mass electrical interconnection design and a readable storage medium. The automatic error detection and correction method for mass electrical interconnection design comprises the steps that S1, a product electrical interconnection design data file is generated; s2, automatically detecting a design error, and detecting the design error in the product electrical interconnection design data file based on a predefined rule element set and a standard specification; and S3, designing automatic error correction, and completing error correction and data synchronization through a visual navigation interface. According to the method, the design errors in the product electrical interconnection design data file are automatically detected based on the predefined rule element set and the standard specification, and error correction and data synchronization are completed based on the visual navigation interface, so that the correctness and the normalization of massive electrical interconnection design data in a complex product or system are effectively solved, and the accuracy and the reliability of the product electrical interconnection design data are improved. Therefore, the interconnection design efficiency and quality of the complex electrical system are remarkably improved.
Owner:SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP

An eddy current sensor with automatic calibration function

The invention discloses an eddy current sensor with an automatic calibration function, which relates to the technical field of eddy current sensors and comprises a motor and a shell, wherein the shell is arranged on a driving shaft of the motor, an excitation coil, a receiving coil and an ASIC circuit are arranged in the shell, a calibration device is arranged outside the motor, and the calibration device comprises: a fan and a rotating body, and when a displacement plate moves, the excitation coil, the receiving coil and the ASIC circuit in the shell cooperate with each other, so that the amplitude and polarity of an output voltage signal change with the position of the displacement plate, and then the position information of the displacement plate can be obtained, thereby realizing the static calibration of the eddy current sensor, and a toggle rod impacts against a sawtooth to generate vibration through the impact, so that the excitation coil, the receiving coil and the ASIC circuit in the shell cooperate with each other, so as to realize the function of dynamic calibration of the eddy current sensor.
Owner:CHANGZHOU HUAXUAN SENSING TECH CO LTD

Optimization method and device of logistics order splitting system, electronic equipment and storage medium

This application discloses an optimization method, apparatus, electronic device, and storage medium for a logistics order allocation system, relating to the field of logistics data processing. The specific implementation includes: obtaining keywords from a keyword library of the logistics order allocation system; matching the keywords with historical order address information in an address library to obtain N first historical order addresses matching the keywords; where N is a positive integer; in response to the N first historical order addresses belonging to multiple sites, setting the keywords as invalid keywords; determining expanded keywords for the invalid keywords based on the N first historical order addresses and the address library; and writing the expanded keywords into the keyword library. This solution can optimize the maintenance method of keywords in the logistics order allocation system, thereby improving the accuracy of order allocation, increasing logistics speed, and reducing labor costs.
Owner:BEIJING JINGDONG ZHENSHI INFORMATION TECH CO LTD

A method, apparatus, and equipment for azimuth calibration of UWB base stations based on auxiliary base stations.

This application provides a method, apparatus, and device for azimuth angle calibration of UWB base stations based on auxiliary base stations. The method includes: determining multiple target areas of a target scene during the movement of the auxiliary base station, wherein the auxiliary base station satisfies constraints with at least two UWB base stations when it is in a target area; for each target area, acquiring target angle measurement data corresponding to at least two UWB base stations corresponding to the target area, determining the relative angle relationship between the azimuth angles of at least two UWB base stations based on the target angle measurement data; and calibrating the azimuth angles of multiple UWB base stations in the target scene based on the relative angle relationship between the azimuth angles of at least two UWB base stations corresponding to each target area. This technical solution automatically calibrates the azimuth angles of multiple UWB base stations, with simple calibration operation, high calibration accuracy, and high calibration efficiency.
Owner:HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD

A robot collision detection calibration, collision detection method, device and system

The embodiment of the application belongs to the technical field of robot collision detection, and relates to a collision detection calibration method of a robot. The method comprises the following steps: acquiring a calibration grid corresponding to the robot; determining position information of a contact point at which an actuator presses the surface of the robot based on the calibration grid; generating a control instruction based on the position information of the contact point and in combination with a preset action strategy, and instructing the actuator to press each contact point on the surface of the robot with a corresponding force according to the preset action strategy through the control instruction; acquiring corresponding calibration haptic information of each contact point each time the contact point is pressed; and constructing collision detection calibration data of the robot by using the position information of each contact point, the corresponding force and the corresponding calibration haptic information. The embodiment of the application also relates to related robot collision detection methods, devices and systems, etc. The technical solution of the application can improve the calibration efficiency of robot collision detection.
Owner:PASSINI PERCEPTION TECH (SHENZHEN) CO LTD

Pump speed dynamic calibration device and method based on weighing feedback

The invention relates to a pump speed dynamic calibration device and method based on weighing feedback, which are applied to the technical field of biological pharmacy, and the method comprises the following steps: setting a weighing module to directly measure the weight change so as to calculate the actual flow speed, thereby getting rid of the dependence on inaccurate and variable empirical parameters such as flux per revolution and the like, and improving the accuracy of the calibration. And the authenticity and the accuracy of the feedback data are fundamentally ensured. The actual flow velocity is compared with the target flow velocity through a calibration algorithm built in the control module, the rotating speed of the pump is adjusted in real time based on deviation, and a closed-loop control system is constructed. The system can respond in real time and automatically compensate flow velocity deviation caused by various factors such as pump rotating speed nonlinearity, pipeline pressure fluctuation, pump and pipeline abrasion and aging and the like, the precision and stability of flow velocity control are remarkably improved, and the adaptability and the anti-jamming capability of the device are enhanced. According to the invention, automatic calibration and stable control of the flow are realized, and the method is especially suitable for a continuous production process with high requirements on precision and stability.
Owner:CHALLENGE IM (BEIJING) TECHNOLOGY CO LTD

Automatic calibration and storage device of gas spectrum database

The utility model relates to the technical field of gas spectrum analysis, in particular to an automatic calibration and storage device of a gas spectrum database, which comprises a gas chamber, a sealing cover is arranged on the upper side of the gas chamber, and an adjustable light source module, a gas spectrum calibration module and an integral processor are sequentially arranged on the upper side of the sealing cover from left to right. A heat dissipation type storage module is arranged at the right end of the lower side of the gas chamber, two gas path assemblies are arranged in the gas chamber and can be divided into a calibration gas path assembly and a cleaning gas path assembly, the calibration gas path assembly is used for normal gas calibration and conveying, and the cleaning gas path assembly is used for cleaning the calibration gas path assembly. According to the utility model, a highly integrated modular structural design is adopted, and the adjustable light source module, the gas spectrum calibration module, the overall processor and the heat dissipation type storage module are organically integrated around the gas chamber, so that the integrated functions of automatic calibration, analysis and storage of gas spectrum data are realized; and independent maintenance and upgrading of each functional module are facilitated.
Owner:SHENZHEN EMPAER TECH CO LTD

Angle measurement error calibration equipment

The utility model relates to the technical field of error calibration, in particular to angle measurement error calibration equipment which is fixedly mounted on a base through a supporting seat, a rotating shaft is rotatably mounted on the supporting seat, a calibration rod is fixedly mounted on the rotating shaft, the rotating shaft penetrates through the calibration rod, a groove is formed in the calibration rod, and a fixing assembly is mounted on the calibration rod. The driving assembly drives the calibration rods to rotate, the angle ruler is fixedly installed on the supporting seat and located on the side, close to the calibration rods, of the supporting seat, during calibration, the calibration rods on the two sides are driven by the driving assembly to rotate in the opposite direction or the reverse direction, the two edges of the corner connector are driven by the fixing assembly to be opened or closed through rotation of the calibration rods, and therefore the angle of the corner connector is calibrated. Therefore, the automatic calibration of the corner connector is realized, and the calibration efficiency and precision are improved.
Owner:JILIN TEACHERS INST OF ENG & TECH

A method for calibrating camera extrinsic parameters and a storage medium

The camera extrinsic parameter calibration method and the storage medium provided by the embodiment of the application can be applied to the field of information technology, can acquire a monitoring image collected by a target camera, can perform feature extraction on the monitoring image, and can create a target feature map according to the extracted features; initial values of target point cloud data of a scene where the target camera is located and installation position information of the target camera are acquired; an initial projection matrix is created according to the initial values of the target point cloud data and the installation position information, the target point cloud is projected onto the target feature map through the initial projection matrix, and a first projection result is obtained; the projection matrix is corrected according to the first projection result, a target projection matrix is obtained, and the extrinsic parameter of the target camera is calculated according to the target projection matrix. It can be seen that, by using the method of the embodiment of the application, the projection matrix can be solved, the extrinsic parameter of the target camera is calculated according to the finally obtained target projection matrix, and the automatic calibration of the target camera is realized.
Owner:HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD