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130results about How to "Comprehensive parameters" patented technology

Surface defect detection method based on positive case training

The invention relates to a surface defect detection method based on positive case training. The method comprises two steps of image reconstruction and defect detection, image reconstruction is to reconstruct an inputted original image into an image without defects, reconstruction steps are as follows, artificial defects and noise are added to the positive case image during training, a self-encoderis utilized for reconstruction, the L1 distance between the reconstruction result and the noise-free original image is calculated, the distance is minimized as a reconstruction target, in cooperationwith the generative adversarial network, the reconstruction image effect is optimized; defect detection is performed after image reconstruction, LBP features of the reconstructed image and the original image are calculated, after difference between the two feature images is made, the two images are binarized based on the fixed threshold, so the defects are found. The method is advantaged in thatthe depth learning method is utilized, the method can be sufficiently robust to be less susceptible to environmental changes when positive samples are enough, moreover, based on regular training, themethod does not rely on a large number of negative samples and manual annotation, the method is suitable for being used in real-world scenarios, and the surface defects can be better detected.
Owner:NANJING UNIV +2

Method and device for evaluating pilling resistance of yarn by on-line inlet and outlet measurement mode

The invention relates to a method and a device for evaluating the pilling resistance of a yarn by an on-line inlet and outlet measurement mode. The method comprises the steps of input pre-evaluation, uniform winding forming, preparation of a test sample by carrying pressurizing friction, stable backing-off and on-line measurement, comparison and evaluation. The device comprises a yarn supply and recovery device, a yarn pilling condition measurement device and a winding friction mechanism. The yarn pilling condition measurement device comprises a capacitor plate, a static electricity generation device and a yarn hairness measurement system. The static electricity generation device comprises a prepositive static electricity generator and a post static electricity generator. The prepositive static electricity generator and the post static electricity generator are respectively arranged at both sides of the yarn hairness measurement system. The capacitor plate is arranged at the rear sideof the post static electricity generator. The winding friction mechanism comprises a winding drum. The separation position of the unwound yarn and the winding drum is provided with a backing-off tension measurement mechanism. The winding friction mechanism is connected with a reciprocating mechanism. In the invention, the yarn is used for directly testing and panel knitting is not used; and by taking a base yarn as the contrast, the method and the device are more accurate.
Owner:DONGHUA UNIV

Reliable data interaction method based on RS-422 serial bus technique

The invention relates to a reliable data interaction method based on an RS-422 serial bus technique, and with the combination of continuous auto repeat request (Auto Repeat request ARQ) protocol, discloses a novel data interaction and verification method based on the RS-422 serial bus technique. A host computer and a lower computer have a response mechanism and repeat frame verification, and moreover the host computer can continuously transmit a plurality of data frames before receiving a response frame transmitted from the lower computer, copies of the data frames can be stored in transmitting buffer when the data frames are transmitted, and corresponding data frame copies in the buffer can be deleted after the host computer receives the response frame. Until a certain number of data frames which do not receive the response frames are accumulated, the host computer stops to retransmit the data frame copies in the buffer. The utilization rate and the communication speed of a channel can be greatly increased. Aiming at the characteristics of an embedded system, information type recognition codes are added into the data frames for communication of the host computer and the lower computer, so that communication of multiple time sequences, parameters and task instructions of the embedded system can be achieved simultaneously.
Owner:深圳市锐驰曼科技发展有限公司

Method and device for simultaneously detecting elements, defects and residual stress

The invention discloses a multifunctional laser photoacoustic detection method and device for elements, defects and residual stress, and belongs to the field of laser material detection. Pulse laser is incident to the surface of a sample to be detected by utilizing a pulse laser in order to generate plasma and ultrasonic waves, and the elemental composition, the structural defects and the residualstress of the sample can be simultaneously analyzed. The detection system comprises an excitation unit, a spectrum detection unit, an ultrasonic detection unit and an analysis control unit, wherein adigital delayer is connected to a computer; a high-precision 3D displacement platform is electrically connected to the digital delayer; the pulse laser emitted by the pulse laser is modulated, focused and incident to the surface of the sample to be detected through a light path system in order to generate the plasma and ultrasonic waves at the same time; the ultrasonic detection unit is used fordetecting the ultrasonic waves; and the spectrum detection unit is used for detecting a visible light spectrum emitted by plasma flame. According to the method and the device, simultaneous detection and analysis of the elemental composition, the defects and the residual stress of the sample can be realized.
Owner:HUAZHONG UNIV OF SCI & TECH

Spectrum magneto-optical ellipsometry analysis device of rotary compensator as well as application thereof

The invention discloses a spectrum magneto-optical ellipsometry analysis device of a rotary compensator as well as application thereof. The spectrum magneto-optical ellipsometry analysis device comprises a light source module, a light path module, a magnetic field module, a sample table, a motor control module and a detection and analysis module, the light path module comprises a collimating lens,a polarizer, a compensator and a polarization analyzer, the detection and analysis module comprises a computer and a detector, the collimating lens, the polarizer, the compensator, the sample table,the polarization analyzer and the detector are sequentially arranged along a light path direction, the polarizer and the compensator are located in an incidence light path, the polarization analyzer is located in an emergence light path, and the incidence light path and the emergence light path are located at the two sides of the sample table and respectively keep an included angle Phi with normalof the sample table. The device disclosed by the invention can represent optical and magnetic parameters of a magnetic film material under longitudinal or poloidal magneto-optical Kerr effect, can obtain thickness, optical parameters and magnetic parameters of a magnetic film sample during one test and is relatively high in automation degree.
Owner:SHANDONG UNIV

Monitoring equipment of intelligent transformer

The invention discloses monitoring equipment of an intelligent transformer, comprising an equipment cabinet, a voltage current and bushing insulation measurement improvised explosive device (IED), a basic parameter measurement IED, a cooling device monitoring IED and a power box for IEDs, wherein the equipment cabinet is used for containing equipment and the power box; the voltage current and bushing insulation measurement IED is used for carrying out measurement on effective values of working voltage, load current, bushing tap current, neutral point current, and is in charge of calculation on power factors, dielectric loss, harmonic content, harmonic distortion rate and other electric parameters; the basic parameter measurement IED is used for monitoring light gas and heavy gas, contents of the light gas and heavy gas, a pressure relief valve, tap switch gears, switch oil level, iron core earth current as well as temperature, humidity and other numbers and analog quantity in the equipment cabinet; the cooling device monitoring IED is used for monitoring the status of a cooler, winding temperature, top oil temperature, bottom oil temperature, ambient temperature, humidity and other numbers and analog quantity; and the power box for the IEDs is used for providing +/-5V, +/-12V and +/-24V stabilized voltage supplies for the three IEDs. For the monitoring equipment, the functions are abundant, and a modular design is adopted, thus being simple and easily used; and in addition, the monitoring equipment has strong applicability and good development aspects.
Owner:TIANJIN POLYTECHNIC UNIV

Gas tightness detector and method for testing internal volume of container by aid of gas-release process

ActiveCN102721516AEquilibrium timeMeasurable internal volume valueMeasurement of fluid loss/gain rateContainer/cavity capacity measurementMicrocontrollerElectricity
The invention relates to a gas tightness detector and a method for testing the internal volume of a container by the aid of a gas-release process. The gas tightness detector comprises a gas tightness detector gas circuit electrically connected with a microcontroller, a pressure sensor and a temperature sensor are mounted on a channel of the gas circuit between the detected container and a gas-release valve, and a gas inlet valve pipeline is connected with a high-pressure gas source. When a measuring and controlling module in the microcontroller controls a gas inlet valve to be opened, and gas of the high-pressure gas source flows into the detected container, namely, a gas tightness detecting process is started; when detection is completed and the gas is about to be released, the measuring and controlling module acquires the pressure PH and the initial temperature TH of the inside the detected container in an initial state via the pressure sensor and the temperature sensor; the measuring and controlling module controls the gas-release valve to be opened and starts counting, the immediate pressure P of the tested container in each real-time state is acquired, moments t respectively corresponding to starting of the gas-release process and acquisition of the pressures of the detected container in various real-time states are recorded, and a series of internal volume values of the detected container are obtained according to the immediate pressures, which are detected at the various moments, of the inside of the detected container; and a final internal volume value of the detected container is obtained by data statistics processing.
Owner:安徽中科智能高技术有限责任公司

Millimeter wave communication and radar integrated radio frequency front end designing method

The invention provides a millimeter wave communication and radar integrated radio frequency front end designing method, and aims at achieving the diversity of signal receiving and transmitting of a millimeter wave radar, integration of millimeter wave communication and radar functions and integration of a millimeter wave radar radio frequency front end and a transmitting-receiving antenna. According to the millimeter wave communication and radar integrated radio frequency front end designing method, firstly, on the basis of a universal communication chip, a radar transmitting-receiving circuitis designed, therefore, the millimeter wave radar can transmit and receive baseband input signals of an arbitrary modulation system, necessary hardware support is provided for a more complex parameter estimation algorithm for radar signal processing, and at the same time, the integration of the communication and the radar is achieved; then, a microstrip balun structure and a microstrip antenna which are used for converting differential signals into single-ended signals are designed for the radio frequency front end, so that integration design of the millimeter wave radar radio frequency frontend and the transmitting-receiving antenna is achieved; finally, a strip-line feed structure is designed for the microstrip receiving antenna of a radio frequency front end receiving circuit, and theinfluence of a microstrip feed line self-radiation direction on an antenna self-radiation direction diagram is effectively reduced.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Detection device for knife point dynamic characteristics of numerical control machine tool and method of detection device

The invention discloses a detection device for knife point dynamic characteristics of a numerical control machine tool and a method of the detection device. Mainly the problems that detection performance indexes of knife point dynamic characteristics of an existing numerical control machine tool are not comprehensive or accurate, and detection cost of instruments and cutting test pieces is high are solved. The detection device for the knife point dynamic characteristics of the numerical control machine tool comprises a supporting base, a connecting plate and an L-shaped supporting wall plate. The top of the supporting base is provided with displacement sensors in a penetrating manner through holes, wherein the displacement sensors are arranged in the manner that every two displacement sensors are perpendicular to each other; meanwhile, acquired temperature data of main heat sources of the machine tool are integrated so that a main shaft can acquire real-time location and posture information of a point of a knife point in the swinging or rotating process, and correlation calculation of accuracy and generation of compensating data are completed by automatically obtaining fused data information through a data collector and transmitting the fused data information to a computer at high speed to be recorded and analyzed. The detection device is ingenious in structural design, the knife point characteristic testing functions are comprehensive, universality is high, numerical control machining precision testing cost is greatly reduced, and good practical and popularization value is achieved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Garment image retrieval method fusing color feature and residual network depth feature

The invention belongs to the technical field of image retrieval, and discloses a garment image retrieval method fusing color features and residual network depth features, which comprises the followingsteps: inputting a training data set into a ResNet50-based network model; fusing the deep features and the color feature information to serve as global feature representation of the image; clusteringthe vectors in the feature library by using a K-Means algorithm; inputting a to-be-retrieved garment picture into the neural network the same as the data set, and obtaining a global feature vector ofthe to-be-queried garment picture; and sequentially calculating the distances between the vectors of the clustering centers and the vectors of the to-be-retrieved pictures, and performing similaritymeasurement through comparison of the distances to obtain a retrieval result. Experimental results show that the method can be combined with various feature information of the picture, the retrieval efficiency is high, and the time overhead is small. The extracted deep features have certain effectiveness and hierarchy. The method has high robustness and practicability and is superior to other mainstream retrieval methods.
Owner:WUHAN TEXTILE UNIV

Method and device for high-accuracy field measurement of terrestrial magnetism vectors

The invention provides a method and device for high-accuracy field measurement of terrestrial magnetism vectors. A tripod, a perpendicular coil and a total field magnetometer are utilized to measure a synthesized magnetic field value T-1 and a synthesized magnetic field value T-2 of a normal terrestrial magnetic field To without an additional magnetic field, a perpendicularly-upward magnetic field Tf additionally arranged for a terrestrial magnetic field and a double perpendicularly-upward magnetic field 2Tf additionally arranged for the terrestrial magnetic field, and please see the specification for the expression of the calculation formula; a horizontal coil is arranged, the geometric center of the perpendicular coil and the geometric center of the horizontal coil are made to coincide with each other, the total field magnetometer is utilized to measure a synthesized magnetic field value T+ / / and a synthesized magnetic field value T- / / after a horizontal forward magnetic field and a horizontal reversed magnetic field are additionally arranged for the terrestrial magnetic field, a terrestrial magnetism declination is calculated, and please see the specification for the expression of the calculation formula, wherein DO is equal to the value of the included angle between the axis of the horizontal coil and the geographical north direction and is a known preset value. Only the coils need to be horizontally adjusted before observation, and the method and device are suitable for large-area rapid measurement in geophysical exploration field general survey operation.
Owner:CHINA METALLURGICAL GEOLOGY BUREAU GEOLOGICAL EXPLORATION INST OF SHANDONG ZHENGYUAN

Short-distance or vertical take-off and landing aircraft with distribution type power system

PendingCN109911194ALoad Space OptimizationReasonable load spaceAircraft componentsAll-wing aircraftFlight vehicleControl theory
The invention discloses a short-distance or vertical take-off and landing aircraft which mainly comprises a lifting body, a lifting fan system and a propelling system, wherein the lifting fan system and the propelling system form a distribution type power system. According to the lifting fan system, force in a vertical and / or horizontal direction can be provided, and the size and / or the directionof the force can be adjusted; according to the propelling system, force in the vertical and / or horizontal direction can be also provided, and the size and / or the direction of the force can also be adjusted. When the aircraft takes off or lands down, lifting force is mainly provided by the fan system and / or the propelling system. Along with increase of the speed of the aircraft, the lifting force provided by the lifting body is increased, and the lifting force provided by the lifting fan system and the propelling system is reduced. At a horizontal flying state, the inlet and the outlet of the lifting fan can be closed, then the flying resistance can be reduced, and the lifting force can be increased. The aircraft has the advantages that requirements of the aircraft on take-off and landing fields can be lowered, the aircraft is high in horizontal flying efficiency, and the aircraft is good in controllability and reliability.
Owner:周雯韵

Piezoelectric magnetic-sensing traffic information comprehensive monitoring device

The invention belongs to the field of detection of traffic information, particularly relates to a piezoelectric magnetic-sensing traffic information comprehensive monitoring device and aims to provide a device with low cost and more complete functions. The comprehensive monitoring device is characterized by comprising a sensor group, a signal conditioning device, a data acquisition system and a data processing system, wherein the sensor group is connected with the signal conditioning device; the signal conditioning device is also connected with the data acquisition system; the data acquisition system is connected with the data processing system; and the data processing system is connected with a data center. By adopting the sensor group consisting of a geomagnetic image sensor, a piezoelectric sensor and a foundation temperature sensor, acquired parameters are comprehensive and precise and can meet requirements of traffic regulation and control. By adopting the signal conditioning device consisting of a first-level amplifying circuit, a second-level amplifying circuit and a high-pass filter, the measurement precision is improved. By adopting a data filter processing technology and a dynamic sampling storage speed technology based on a real-time vehicle speed, the data calculation precision can be improved effectively.
Owner:CHINA ACAD OF TRANSPORTATION SCI

Steam vortex shedding flowmeter measuring multiple parameters

The invention discloses a steam vortex shedding flowmeter measuring multiple parameters. A vortex generation body is installed in an inner hole of a meter body with a measuring tube. A hole is perpendicularly formed outside the meter body with the measuring tube in the face right behind the vortex generation body so that a flow sensor can be installed. A supporting cylinder is installed above the meter body with the measuring tube. The flow sensor is covered with the supporting cylinder. A flow totalizer is installed at the upper end of the supporting cylinder. The steam vortex shedding flowmeter measuring the multiple parameters has the advantages that the multiple parameters of steam can be measured, the measuring range is wide, the steam measurement accuracy is high, pressure loss is small, various sensors are integrally designed, and the flowmeter is compact in structure, high in reliability, low in manufacturing cost, convenient to use and maintain, long in service life and the like; the flow sensor and a temperature sensor which are resistant to high temperature are adopted so that the steam vortex shedding flowmeter measuring the multiple parameters can measure saturated steam and superheated steam with higher temperature.
Owner:HEFEI JINGDA INSTR

In-situ chemical oxidation remediation monitoring and regulating system

The invention provides an in-situ chemical oxidation remediation monitoring and regulating system, and belongs to the technical field of pollution treatment. According to the invention, in an in-situchemical oxidation modification process, various geochemical parameters in soil, underground water and soil gas are comprehensively monitored; According to a result of an early-stage small test or pilot test, a data normal change interval in the repairing process and a data standard reaching expected inflection point in the repairing effect are further set, the actual monitoring data is judged, ifthe monitoring data exceeds a normal range, an alarm is given and an adjustment suggestion of medicament injection is given; and an on-site repairing medicament injection system is dynamically adjusted after the adjustment suggestion is confirmed on site. According to the invention, comprehensive parameter monitoring is realized, the final repair effect is judged, an accurate adjustment suggestion signal is timely fed back to the in-situ injection control end, and parameters such as the injection mode or the injection rate of the chemical repair agent are adjusted. According to the method, the purpose of in-situ chemical oxidation accurate repair is achieved.
Owner:ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND

Chewing force composite test robot

The invention belongs to the technical field of robots and discloses a chewing force composite test robot. A problem of a single function caused by a failure of transverse chewing movement in the prior art is solved. The robot comprises a static platform. An upper jaw movement platform and a mandibular movement platform are up-down correspondingly arranged on the static platform. The upper jaw movement platform comprises an upper jaw installation platform wherein an upper jaw tooth model is installed. A ball pair connection pushing force rod is hinged to an upper end ball of the upper jaw installation platform. One end of the ball pair connection pushing force rod is hinged to the upper jaw installation platform. The other end of the ball pair connection pushing force rod is connected witha universal joint of the upper end of the static platform. Two shaft connection pushing force rods are arranged on the upper jaw installation platform. One end of each shaft connection pushing forcerod is connected with the upper jaw installation platform. The other end of each shaft connection pushing force rod is hinged to a pushing rod installation sleeve on the static platform. The pushing rod installation sleeve sleeves a rotation shaft of the lower end of the static platform.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Computing method for torsional rigidity of split conductor of overhead power transmission line

InactiveCN102436546AFactors that reflect torsional stiffnessImprove calculation accuracySpecial data processing applicationsEngineeringForce analysis
The invention discloses a computing method for torsional rigidity of a split conductor of an overhead power transmission line. The method comprises the following steps of: firstly, analyzing length change of a sub-conductor due to a torsional movement of the split conductor, and deducing a practical level tension computational formula according to a linear formula of the power transmission line and material property of the conductor when the sub-conductor is torsional; then carrying out a mechanical analysis for a four-split conductor under the action of a torque, in the analysis process, utilizing a characteristic that the split conductor is divided into multiple subspans through a conductor spacer, firstly carrying out a force analysis for the subspans, and finally obtaining a torque balance equation under the action of the torque, and further obtaining a computational formula for the torsional rigidity of the four-split conductor. Finally, summarizing a common computational formula for the torsional rigidity of the split conductor for any split number. In the computing method, the method is adopted to calculate the torsional rigidity of the split conductors with parameters, such as different split numbers and span length and the like, and higher computational accuracy can be achieved, and effectiveness and adaptability of the computing method can be proved.
Owner:XI AN JIAOTONG UNIV
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