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65results about How to "Will not misjudge" patented technology
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HVDC commutation failure fault diagnosis method based on valve voltages or valve currents
The invention discloses an HVDC commutation failure fault diagnosis method based on valve voltages or valve currents. The method comprises the following steps that a commutation failure mechanism and commutation failure influence factors are analyzed; commutation failure process analysis is carried out, and a commutation failure criterion is determined; an HVDC model contravariant side equivalent circuit is built, and a commutation failure critical inductance value is determined; whether the diagnosis result is accurate or not is verified through simulation. According to the fast commutation failure diagnosis method based on the converter valve voltages or the valve currents, the theoretical analysis and stimulation result proves the accuracy and effectiveness of the method, no blind diagnosis area exists, and the method is simple in theory and easy to implement, and has certain project application value.
Owner:STATE GRID CORP OF CHINA +1
Method for preventing HttpFlood attack and firewall
The invention provides a method for preventing an HttpFlood attack. The method includes the steps that a firewall generates and maintains a challenge list; the firewall establishes TCP connection with a user and judges whether a source IP address of a get message received from the user exist in the challenge list; if the source IP address of the get message received by the firewall does not exist in the challenge list, the firewall intercepts the get message and establishes a JavaScript redirection page according to the get message and adds the source IP address of the get message, the address of a get request page and the generated address of the generated JavaScript redirection page into the challenge list; when the firewall detects that an entry in the challenge list does not have a redirection access in a preset duration, the firewall adds the source IP address of the entry into a blacklist so as to prevent the subsequent traffic of the source IP address. The invention further provides the firewall for preventing the HttpFlood attack. Through the method, the firewall will not make a misjudgment, so the judgment accuracy rate is high.
Owner:OPZOON TECH
Smooth switching method for switching flexible direct current transmission system from parallel operation into isolated island operation
ActiveCN103414182AWill not misjudgeSafe and stable operationElectric power transfer ac networkNew energyOperation mode
The invention discloses a smooth switching method for switching a flexible direct current transmission system from parallel operation into isolated island operation. According to the smooth switching method, a self-adaptive isolated island detection method which comprehensively takes phase position and frequency of the system into consideration is disclosed by extracting electrical parameter information such as the phase position and frequency of the AC system, and a convertor station control system is automatically switched to an isolated island control strategy when detecting that the system is in an isolated island operation state. The smooth switching method avoids the frequency collapse caused by switching the flexible direct current transmission system into isolated island operation, can adopt different detection methods according to the different transmission powers of an AC transmission line, can accurately and quickly identify which operation mode the system is in, ensures the stable operation of the two end systems during the entire switching process, cannot cause wide fluctuations of the electrical parameters, can avoid the large-scale generator shedding of wind turbine generators caused by the switching of control strategies, and can be widely applied in many occasions such as new energy grid connection and isolated island power supply.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
System and method of detection and control of melted iron drossing on the basis of image processing
ActiveCN105353654AWill not misjudgeAvoid manual judgmentProgramme control in sequence/logic controllersSlagImage based
The present invention discloses a system of detection and control of melted iron drossing on the basis of image processing. The system provided by the invention comprises: a foundry ladle containing melted iron and slags; a slag-containing basin disposed beside the foundry ladle for containing the slags; a crawler loader arranged at one side of the foundry ladle; a camera connected with a processor; a display connected with the processor and arranged at an operator's position for reflection of the drossing state of melted iron liquid level; and the processor configured to obtain image information acquired by the camera, perform analysis and process of image information, display on the display and access a drossing standard database. The present invention further discloses a method of detection and control of melted iron drossing on the basis of image processing. According to the invention, a drossing process is monitored in real time, and it is determined on line whether drossing grades reach an expected target grade or not according to a drossing standard database so that manual management is avoided, therefore drossing grades may be not misjudged.
Owner:田陆
Video course playback method based on user interaction
InactiveCN107801097AImprove interactive experienceGood learning effectSelective content distributionElectrical appliancesHuman–computer interaction
Owner:上海高顿教育培训有限公司
Route unlocking method and device
ActiveCN104512439AGuaranteed real-timeSimplify the unlocking judgment processElectric devices for scotch-blocksReal-time computingRouting table
The application discloses a route unlocking method and a device. A first storage area and a second storage area in an interlocking route table are updated, the real-time properties of section status information and a train address which are recorded in the first storage area and the second storage area are ensured, and then, the interlocking route table is further accessed to obtain the current address of a train and the current status of each section; according to the current address of the train, route signs are maintained, and finally, according to the current route sign and the section status information, the unlocking condition is judged; compared with the prior art, the method disclosed by the application simplifies an unocking judgment process, completes the examination of the section status information while updating the interlocking route table, the temporary collection for the status of a track relay is not required, the unlocking efficiency is improved, and besides, the erroneous judgment for the unlocking conditions cannot be generated by the failure and the abnormal status of the track relay, and the correct unlocking of the route is ensured.
Owner:HUNAN CRRC TIMES SIGNAL & COMM CO LTD
Intelligent voice broadcasting system and method based on environmental noise detection
InactiveCN104616660AEasy to controlReal-time adjustment of eigenvalue volumeAcoustic signal devicesSpeech analysisEnvironmental noiseEnvironmental sounds
The invention discloses an intelligent voice broadcasting system and a method based on environmental noise detection. The method comprises the following steps: in a voice broadcasting process of an intelligent voice broadcasting module, acquiring environmental sound in real time and converting the intelligent environmental sound into a digital signal; detecting a noise signal and a voice signal in the digital signal, judging whether the noise signal affects voice broadcasting or not, outputting a regulating signal while judging that the noise signal affects the voice broadcasting.
Owner:UNISOUND SHANGHAI INTELLIGENT TECH CO LTD
MPPT (maximum power point tracking) scanning method for photovoltaic arrays
ActiveCN103365333AGuaranteed powerAvoid premature termination of scansPhotovoltaic energy generationLight radiation electric generatorHigh energyVoltage range
Embodiment of the invention discloses a MPPT (maximum power point tracking) scanning method and system for photovoltaic arrays and solves the problems of high energy loss and failure in scanning actual global maximum power points in the prior art. The method includes: determining a scan voltage range; determining local maximum power points so as to determine a first reference point and a turning point; comparing the current of the first reference point to that of the turning point so as to determine whether scanning is performed on the reference point or not; if yes, scanning to determine the local maximum power points so as to determine a next reference point and a next turning point; if not, directly determining the next reference point and the next turning point; if the newly determined reference point has the voltage exceeding the determined scan voltage range, ending the scanning; if the newly determined reference point has the voltage not exceeding the determined scan voltage range, re-comparing the current of the reference point to that the turning point so as to determine whether to scan around the reference point or not, and continuing to execute till the end of scanning according to the previous steps; after scanning, using the maximum on of the local maximum power points as the maximum power point of one photovoltaic array.
Owner:SUNGROW POWER SUPPLY CO LTD
Method and device for judging fault of wind electricity doubly-fed generator rolling bearing
InactiveCN103575535AGuaranteed uptimeWill not misjudgeMachine bearings testingElectricityEngineering
The invention discloses a method and device for judging faults of a wind electricity doubly-fed generator rolling bearing. The method comprises the following steps: respectively detecting acceleration signals of a doubly-fed generator driving end and a non-driving end, respectively extracting acceleration extreme point signals so as to obtain a time sequence of acceleration extreme points, respectively calculating elastic support force to obtain a time sequence of the elastic support force, respectively performing DFFT (Discrete Fast Fourier Transform) so as to obtain bearing fault characteristic frequency signal, respectively performing fault judgment on the a doubly-fed generator driving end and the non-driving end according to the bearing fault characteristic frequency signal, and outputting the judgment result. The device comprises a first acceleration sensor, a second acceleration sensor, an acceleration extreme value point extracting module, an elastic support force calculation module, a fault characteristic frequency calculation module and a fault judgment module. The method and the device have the advantages of precise fault detection, high accuracy, convenience and rapidness in detection, convenience in use, and low bearing management and maintenance cost.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Key testing circuit
The invention discloses a key testing circuit. The key testing circuit has the advantages that the key identification performance is good, key circuits of the key testing circuit are in parallel connection, resistance values of all divider resistors are set reasonably, and a single chip microcomputer can judge keys accurately according to different input voltages; the robustness is good, and when a plurality of keyboard keys are pressed at the same time randomly, incorrect judgment is avoided; and the circuit is simple in structure, low in production cost and easy for large-scale production.
Owner:HUIZHOU DESAY SV AUTOMOTIVE
Bootlegging video identification method and system
ActiveCN110197144AReduce distractionsQuality improvementImage enhancementVideo data indexingPattern recognitionNoise reduction
The invention discloses a bootlegging video identification method and system, wherein the method comprises the steps of S1, correcting an image of a to-be-identified video; S2, judging the position ofthe screen by extracting the corrected position area of interest of the video; S3, cutting the corrected video image according to the position of the screen; S4, carrying out noise reduction processing on the cut video image; and S5, carrying out similarity comparison on the to-be-identified video subjected to the noise reduction processing and the genuine video, and judging whether the to-be-identified video is a bootlegging video or not according to a comparison result. Compared with the prior art, the precision and the accuracy of the comparison result of the bootlegging video and the legal copy video can be improved.
Owner:厦门能见易判信息科技有限公司
GIS circuit breaker fault on-line monitoring device based on sound
ActiveCN110926784AOperation impactCondition monitoring is accurateMachine part testingSubsonic/sonic/ultrasonic wave measurementCommunication unitEngineering
The invention discloses a GIS circuit breaker fault on-line monitoring device based on sound. The device comprises a microphone array board and a host circuit board. The microphone array plate comprises an electret microphone and a conditioning circuit. A signal of each electret microphone passes through the conditioning circuit and then is output to the host circuit board. A signal acquisition unit on the host circuit board synchronously acquires an output signal of each electret microphone. The acquired data is processed by the signal processing unit, and whether the acquired data is valid data or invalid data is judged. Effective data and invalid data are stored in the data storage unit, the effective data are input into the AI diagnosis unit, a trained breaker action fault sound modelis arranged in the AI diagnosis unit, the effective data are recognized and judged through the model, and a judgment result is transmitted to a data background through the communication unit. The mechanical state of the circuit breaker is judged through voiceprints, the method does not need to be connected with a circuit breaker entity, and no influence exists on operation of the circuit breaker body.
Owner:SHANGHAI OUMIAO ELECTRIC INSPECTION CO LTD
Water quality monitoring device
ActiveCN108020510AAvoid pollutionAvoid dilutionColor/spectral properties measurementsWater qualityEngineering
The invention discloses a water quality monitoring device. The water quality monitoring device comprises a casing, a front cover plate and a rear cover plate, wherein 6 hollow cavities are formed between two end surfaces in the length direction of the casing. A TDLAS (tunable diode laser absorption spectroscopy) technology is successfully applied to the underwater part, low-cost continuous linearmonitoring of multiple monitoring points is realized, and the water quality monitoring device is unattended, is particularly suitable for meeting the requirements of long term property, continuity andsudden change performance of hydrologic and water-quality monitoring and has positive effect on existing water quality environment detection and monitoring probably.
Owner:SHENZHEN KERED HEALTH TECH CO LTD
Water quality monitoring device and detection method
ActiveCN106802287BAvoid pollutionAvoid dilutionColor/spectral properties measurementsMicrocomputerMicrocontroller
The invention discloses a water quality monitoring device and a detecting method. The water quality monitoring device comprises a shell, a front cover plate and a rear cover plate, wherein 6 hollow cavities are arranged between two end faces in the length direction of the shell. The detecting method of the water quality monitoring device comprises 7 steps of single chip microcomputer detection and the like. The water quality monitoring device successfully utilizes a TDLAS technology underwater, achieves continuous monitoring with low cost, multiple monitoring points and continuous linearity, avoids staff duty, is especially suitable for the characteristics of long lasting, continuity and mutability of hydrology and water quality monitoring and possibly has a positive effect on detecting and monitoring existing water quality environment.
Owner:深圳市升阳升人居环境服务有限公司
Automatic detection table for electric quantity of energy storage battery
PendingCN114371413AReduce labor efficiencyWill not misjudgeElectrical testingLaboratory benches/tablesElectrical batteryAutomotive engineering
The invention relates to the technical field of battery detection, in particular to an energy storage battery electric quantity automatic detection table which comprises a detection table and a controller and further comprises a detection mechanism and a pressing mechanism, the pressing mechanism comprises a lifting plate, a driving assembly and three pressing assemblies, and the detection mechanism is arranged at the top of the detection table and used for detecting the electric quantity of a battery; the detection mechanism comprises a telescopic assembly, three electrifying assemblies and three testing assemblies, the telescopic assembly is arranged at the bottom of the detection table, the three electrifying assemblies are arranged at the top of the detection table at equal intervals, each testing assembly is arranged beside one electrifying assembly, and the driving assembly, each electrifying assembly and each testing assembly are electrically connected with the controller. The automatic detection table for the electric quantity of the energy storage battery can meet the detection of the electric quantity of batteries with different sizes, is high in practicability, can accurately detect the electric quantity of the battery, and is high in precision.
Owner:XIAN UNIV OF TECH
Electrical advanced detection system and method
InactiveCN111025410AMany interference conditionsReduce distractionsElectric/magnetic detection for well-loggingWater resource assessmentThermodynamicsEngineering
The invention discloses an advanced detection system which comprises at least two advanced detection drill holes, electrodes and an electrical prospecting apparatus used for supplying power and collecting current and voltage, wherein the advanced detection drill holes are located in front of a tunneling head-on, one or more electrodes are arranged in the advanced detection drill holes, and the electrodes are connected with the electrical prospecting apparatus. The invention further provides a method adopting the system. The system and the method have the advantages that the electrodes are arranged in the drill holes, then geophysical prospecting detection work is carried out, the geophysical prospecting advanced detection technology and the drilling advanced detection technology are combined, the water damage distribution situation in front of a tunneling roadway can be accurately obtained, the field drilling workload is reduced, the construction efficiency is greatly improved, and theroadway tunneling work progress is improved.
Owner:ANHUI HUIZHOU GEOLOGY SECURITY INST
Abnormality detection method and device for detecting abnormal operation of a work system
The invention provides an abnormality detection method and device for detecting abnormal operation of a work system. The method and device are suitable for detecting abnormal operation of the work system. The method comprises the following steps: calculating the use amount safety range of the operation system in one or more time periods according to historical data streams; and according to the current data flow and the usage amount safety range, calculating an abnormal ratio corresponding to one or more time periods; selecting one or more abnormal time periods from the one or more time periods according to the threshold value and the abnormal ratio; calculating an anomaly indicator for each of the one or more anomaly periods based on the historical data stream and the current data stream; and ranking one or more abnormal time periods according to the abnormal indexes.
Owner:ACER CYBER SECURITY INC
A key detection circuit
ActiveCN102857231BGood button recognitionAccurate judgmentDynamic codingKey pressingElectrical resistance and conductance
The invention discloses a key testing circuit. The key testing circuit has the advantages that the key identification performance is good, key circuits of the key testing circuit are in parallel connection, resistance values of all divider resistors are set reasonably, and a single chip microcomputer can judge keys accurately according to different input voltages; the robustness is good, and when a plurality of keyboard keys are pressed at the same time randomly, incorrect judgment is avoided; and the circuit is simple in structure, low in production cost and easy for large-scale production.
Owner:HUIZHOU DESAY SV AUTOMOTIVE
Data processing method and electronic equipment
PendingCN111079061AIncrease engagementImprove interactivityData processing applicationsWebsite content managementEngineeringHuman–computer interaction
The invention provides a data processing method and electronic equipment, and the method comprises the steps: determining a target prediction value of a first interaction parameter under the conditionthat the value of the first interaction parameter of information flow contents cannot be obtained in a preset time; and displaying the target prediction value on a display interface of the information flow content. In this way, by determining the target prediction value of one first interaction parameter, the user can know the popularity information of the information flow content based on the target prediction value of the first interaction data, the user can be prevented from misjudging the popularity of the information flow content, and the participation degree and interactivity of the user are improved.
Owner:BEIJING QIYI CENTURY SCI & TECH CO LTD
Electronic white board and positioning method thereof
InactiveCN101989164AMeet the needs of environmental protectionOmit requirementsInput/output processes for data processingWhiteboardControl electronics
The invention relates to an electronic white board and a positioning method thereof, in particular to an electromagnetic interactive electronic white board using a pointer device with no battery and a positioning method thereof. The electronic white board uses a plurality of signal management devices to respectively control the antenna substrate in the electronic white board to send out electromagnetic energy so that the energy-sending processes can not interfere mutually and the false judgement on the position of the pointer device with no battery can not be caused. In addition, the battery can be replaced by using the antenna substrate in the electronic white board to send out electromagnetic energy and energy can be provided for the pointer device with no battery to emit electromagnetic signals, thus the electronic white board is more environmentally friendly and practical.
Owner:WALTOP INT
Extraction method and index establishment method of movie video scene fragment
InactiveCN101650958BHigh precisionShorten the timeElectronic editing digitised analogue information signalsCarrier indexing/addressing/timing/synchronisingComputer graphics (images)Line segment
The invention relates to extraction method and index establishment method of movie video scene clips. The extraction method comprises the following steps: (1) obtaining the subtitle information of a movie video, including the text content of the subtitle and the appearing and disappearing time of the subtitle; (2) extracting the structural information of each scene from the script text of the movie video, including dialogues; (3) matching the dialogue information with the text content of the subtitle and obtaining the beginning and ending time of scenes in the video according to the appearingand disappearing time of the matched subtitle; (4) segmenting the movie video according to the final beginning and ending time of scenes in the video, which is obtained in step (3), to obtain the video segments of all scenes. In the index establishment method, the structural information obtained from the step (2) is used for establishing the index of the extracted video segments on the basis of the steps from (1) to (4). The invention has the advantages of low time consumption, high precision, and the like.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI
Boundary ball judgment system based on electromagnetic disturbance
The invention discloses a boundary ball judgment system based on electromagnetic disturbance. The boundary ball judgment system comprises a ball body (1), a boundary line (2), an out-of-bound judgment device (3) and a result prompt device (4); the out-of-bound judgment device (3) comprises m*n boundary trigger coils (31) and a trigger signal processing module (32), the m*n boundary trigger coils (31) are evenly buried in the boundary line (2) and areas in the inner side and the outer side of the boundary line (2), the end faces of the boundary trigger coils (31) and the plane of a court are mutually parallel, and a magnet / guide magnet (11) is fixed to the ball center of the ball body (1); and a signal receiving end set of the trigger signal processing module (32) is correspondingly connected with signal output end sets of the boundary trigger coils (31), and a result output end set of the trigger signal processing module (32) is connected into an input end set of the result prompt device (4). The boundary ball judgment system has the beneficial effects that the accuracy is extremely high, misjudgment caused by influences of player running is avoided, and all functions can further be achieved only through hardware.
Owner:重庆美瓷体育文化传播有限公司
Mouse button locking device
InactiveCN102314236AReduce design difficultyWill not misjudgeInput/output processes for data processingMouse buttonEngineering
The invention provides a mouse button locking device, A CPI (count per inch) button resistor is connected with a CPI button switch selectively. When a user adjusts the CPI value of a mouse, only the CPI resistor is in a connection state, so that the erroneous judgment of a mouse controller caused by pressing other buttons down simultaneously can be prevented, the CPI resistor can be simultaneously prevented from being in parallel connection with other button resistors, and the situation does not need to be considered in the setting in a mouse control chip, thereby being favorable for reducing the design difficulty of the mouse control chip.
Owner:APEXONE MICROELECTRONICS SHANGHAI +1
Fault discrimination method and device for rolling bearings of doubly-fed generators for wind power
InactiveCN103575535BGuaranteed uptimeWill not misjudgeMachine bearings testingElectricityFast Fourier transform
The invention discloses a method and device for judging faults of a wind electricity doubly-fed generator rolling bearing. The method comprises the following steps: respectively detecting acceleration signals of a doubly-fed generator driving end and a non-driving end, respectively extracting acceleration extreme point signals so as to obtain a time sequence of acceleration extreme points, respectively calculating elastic support force to obtain a time sequence of the elastic support force, respectively performing DFFT (Discrete Fast Fourier Transform) so as to obtain bearing fault characteristic frequency signal, respectively performing fault judgment on the a doubly-fed generator driving end and the non-driving end according to the bearing fault characteristic frequency signal, and outputting the judgment result. The device comprises a first acceleration sensor, a second acceleration sensor, an acceleration extreme value point extracting module, an elastic support force calculation module, a fault characteristic frequency calculation module and a fault judgment module. The method and the device have the advantages of precise fault detection, high accuracy, convenience and rapidness in detection, convenience in use, and low bearing management and maintenance cost.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
Breathing humidifier, dry burning detection method thereof and computer readable storage medium
PendingCN114209953AAvoid discomfortAvoid safety accidentsRespiratorsMedical devicesThermodynamicsEngineering
The invention relates to a breathing humidifier and a dry burning detection method thereof and a computer readable storage medium, the breathing humidifier and the dry burning detection method thereof comprise the following steps: 1, controlling the temperature of a heating disc to be maintained at a preset temperature; secondly, the current input power P < total > of the heating disc is substituted into a standard relation between power and temperature to obtain the normal temperature T < disc > of the heating disc; step 3, calculating according to a formula = to obtain a temperature difference delta T; if the delta T is smaller than or equal to the threshold value D, the second step is executed again, and when the delta T is larger than the threshold value D, dry burning is judged; the threshold value D is 4-5 DEG C. Due to the fact that the standard relation between the power and the temperature is adopted in dry burning detection, and the standard relation between the power and the temperature comprises the power loss condition of the heating disc, the quality of the heating disc, the quality of water in the humidifying tank and the initial temperature, the judgment accuracy is high.
Owner:JIANGSU YUYUE MEDICAL EQUIP&SUPPLY CO LTD +3
Test circuit board and method of operation thereof
ActiveCN110907795BGuaranteed normal transmissionNo bandwidth restrictionsElectronic circuit testingControl theoryComputer science
Owner:SV PROBE PTE LTD
A smooth switching method for flexible direct current transmission system from parallel to island operation
ActiveCN103414182BWill not misjudgeSafe and stable operationElectric power transfer ac networkNew energyEngineering
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Standby mode control method and control system
ActiveCN110971226BSimple structureHigh working reliabilityReliability increasing modificationsControl systemMode control
The present invention discloses a standby mode control method and a control system. The control method includes: S1, judging whether the load is stable in the light load state according to the switching action of the DC / DC chip; S2, when the load is stable in the light load state, According to the working time and interval time of the switching action of the DC / DC chip, determine whether the load is in an extremely light load state; S3, when the load is in an extremely light load state, control the DC / DC chip to enter the standby mode. The circuit structure of the present invention is simple, no need to add an analog circuit; the standby mode does not frequently enter and exit, and the circuit does not need to be frequently turned off and started, which can effectively improve the work reliability; the standby mode does not misjudge, and can ensure that the standby mode is only entered under extremely light load. .
Owner:3PEAK INC
An Improved Sea Antenna Detection and Evaluation Method
ActiveCN111105390BStable detectionAccurate detectionImage enhancementImage analysisComputer imageLow contrast
The invention belongs to the technical field of computer image processing, in particular to an improved method for detecting and evaluating sea antennae. The steps of the present invention are: according to the characteristics of the noise distribution in the sea antenna image, image preprocessing operations are performed, including: image color space conversion, image smoothing, image illumination enhancement, etc.; brightness information is extracted to obtain a grayscale image; according to the sea antenna According to the distribution characteristics of the sky area and ocean area in the image, the image is segmented according to the diagonal direction of the image; the brightness threshold of the sky area and the ocean area, and the brightness threshold of the area around the sea antenna; the pixel points of the area around the sea antenna are obtained; After a linear fitting operation, the final sea antenna position is obtained and plotted; based on the predicted and real sea antenna positions in the image, two original indicators are used for evaluation. The method of the invention can detect the position of the sea antenna stably, accurately and efficiently in strong illumination scenes, low contrast scenes, complex scenes and conventional scenes.
Owner:FUDAN UNIV
Manufacturing method of test block forultrasonic detection of non-welding defect of diffusion welding interface
PendingCN112945669AWon't hurtWill not misjudgeAnalysing solids using sonic/ultrasonic/infrasonic wavesPreparing sample for investigationStructural engineeringWelding defect
The invention discloses a manufacturing method of a test block for ultrasonic detection of a non-welding defect of a diffusion welding interface. The manufacturing method comprises a manufacturing method of a rotor plunger hole comparison test block and a manufacturing method of a rotor end face comparison test block. The manufacturing method of the rotor plunger hole reference block comprises the following steps: a, drilling a plurality of transverse holes with different diameters on the side surface of a steel substrate to obtain a product A, and b, connecting the product A and a copper pipe into a whole by utilizing diffusion welding to obtain a finished product of the rotor plunger hole reference block, the manufacturing method of the rotor end face comparison test block comprises the following steps: c, drilling a plurality of vertical holes with different diameters on the end face of another steel substrate to obtain a product C, and d, connecting the product C and a copper plate into a whole by utilizing diffusion welding to obtain a finished product of the rotor end face comparison test block. The test block manufactured by the method is used for ultrasonic detection and quality evaluation of the rotor, and has the advantage that serious misjudgment cannot be caused when the equivalent dimension of the defect is evaluated.
Owner:AVIC LIYUAN HYDRAULIC
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