136 results about "Measurement test" patented technology

The invention relates to a high-temperature-resistant temperature and vibration composite sensor applied to the field of measurement and testing, which comprises a composite sensor body and a composite circuit board arranged in the composite sensor body, and adopts the cooperation of a thermal insulation sleeve, a magnetic induction ring, a thermal insulation protection feedback unit and a ventilation regulation and control unit. According to the composite sensor, the adaptability of the composite sensor body to the environment is effectively promoted, the composite sensor body can be effectively isolated and protected under the high-temperature condition, and the situation that components in the composite sensor body are damaged due to continuous heat transfer is prevented, so that the durability of the composite sensor body is remarkably improved; meanwhile, heat exchange protection can be effectively carried out on the internal environment of the composite sensor body, the influence of heat on all components in the composite sensor body is further reduced, and the heat resistance of the composite sensor body is enhanced.

This invention relates to the field of research on the operational characteristics of overpressure relief devices, and particularly to an experimental device for measuring the operational characteristics of overpressure relief devices under water hammer conditions. The device includes: a high-pressure air compressor, a frame, a piston accumulator, a quick-opening device, a high-pressure test assembly, and a high-frequency dynamic pressure sensor. This invention enables the measurement of operational characteristics under different pressure rise rate loads caused by water hammer phenomena on a test bench, providing an experimental platform for the research on the operational characteristics of overpressure relief devices under high pressure rise rates. The overall device is simple, quick, and stable. It effectively solves the problem of applying high pressure rise rate loads in current overpressure relief device operational characteristic measurement tests, overcomes the danger of using combustible gas explosions as pressure sources in existing operational characteristic measurement tests, and overcomes the shortcomings of existing test methods, such as long testing times, the need to calculate gas explosion pressure, and the difficulty in accurately controlling the pressure rise rate.

To provide a substrate for a high frequency device, which satisfies requirements of low dielectric loss tangent, adhesion and transparency.A substrate for a high frequency device comprising a transparent glass substrate 16 and a transparent resin base material 20 bonded to the glass substrate 16 via an optical clear adhesive 18, wherein the dielectric loss tangent of the resin base material 20 in dielectric loss tangent measurement test is 0.01 or less, the peel strength in peel test is 3.0 Worn or more, and the amount of out gas in out gas test is 5.0 μg / g or less.

The application provides a kind of bar type magnetic core effective permeability low frequency distribution measurement method and device, it is related to low frequency fluctuation detection and application technical field.The method comprises: winding test coil on coil framework, the winding length of test coil is measured and the number of turns is recorded;Test magnetic core is inserted into different positions of test coil, and the inductance of test coil is measured when test magnetic core is in different positions;According to the relationship between permeability and inductance, the area average effective permeability of test magnetic core in different positions is calculated;Based on the preset algorithm, the effective permeability distribution function of test magnetic core is fitted;According to the effective permeability distribution function of test magnetic core, the effective permeability distribution function of the bar type iron-based nanocrystalline alloy magnetic core to be measured is obtained.The application can reduce the measurement error of magnetic core effective permeability, improve the modeling reliability, and obtain the effective permeability distribution function, so as to reduce repeated experiments and improve the modeling efficiency.

The invention discloses an experimental measurement test bed for interaction force between a retainer and a guide surface. The test bed comprises a base, a displacement loading device, an acting force measuring device, a tested unit, an inner ring loading device and a driving device, the tested unit comprises a tested retainer, a tested bearing inner ring, a tested bearing outer ring and a bearing seat; the acting force measuring device is used for measuring the force / torque borne by the measured retainer; the displacement loading device is used for adjusting the spatial position of the measured retainer through the acting force measuring device and positioning the measured retainer; the inner ring loading device is used for applying a static radial load to the inner ring of the tested bearing; the driving device is used for driving the tested bearing inner ring to rotate. The test bed can directly and accurately measure the interaction force between the retainer and the guide surface in the rolling bearing.

The invention discloses a novel power system false data injection attack detection method based on CPO-CNN-SE. The method comprises the following steps: preprocessing a measurement test of a novel power system; performing hyper-parameter optimization by using a crown porcupine optimization algorithm (CPO) to improve the precision of the CNN detection model; meanwhile, in consideration of synchronous increase of the FDIA detection speed, a compression excitation (SE) attention mechanism is introduced, a CNN-SE mixed learning model is formed, and the characterization efficiency of the CNN on FDIA spatial features is enhanced; and finally, carrying out binary classification on the FDIA feature data through a full connection layer, a sigmoid classifier and a binary cross entropy loss function. According to the invention, the FDIA detection precision is improved, and the synchronous improvement of the detection speed is realized.

In some implementations, a test device may initiate a set of measurements by a set of sensors of the test device and of a device under test (DUT), wherein the DUT is a memory device. The test device may obtain the set of measurements of the DUT from the set of sensors based on initiating the set of measurements. The test device may analyze the set of measurements of the DUT, using a first model, to identify one or more defects present with the DUT. The test device may determine, using a second model, that the one or more defects present with the DUT satisfy a failure threshold. The test device may provide, based on the failure threshold being satisfied for the DUT, an output indicating that the failure threshold is satisfied for the DUT.

The present invention provides a binder powder for nonaqueous secondary battery electrodes, which contains a particulate polymer, and which, when a measurement test for obtaining a sheet sample by hot-pressing the binder powder and measuring the surface free energy of the sheet sample is carried out, can increase the surface free energy of the sheet sample. The dispersion component [gamma] Sd and the polar component [gamma] Sp of the surface free energy satisfy the following formula (1): O < = [gamma] sp / [gamma] sd < = 2 (1).

The invention discloses a PIV flow field measurement test support frame for a cooling fan, an upper connecting frame is provided with a plurality of upper fixing holes, the upper connecting frame is provided with a support plane used for being attached to and supported on an end face position outside or inside a fan hole area of the cooling fan, one end of each of the plurality of fixing holes penetrates through the support plane, and the other end of each of the plurality of fixing holes penetrates through the support plane. Hot melt adhesive is dripped into the multiple upper fixing holes to fix the cooling fan and the upper connecting frame; the lower connecting frame is used for being detachably supported and fixed on a test platform or a base; the upper end of the vertical cylinder frame is fixed with the upper connecting frame, and the lower end of the vertical cylinder frame is fixed with the lower connecting frame; when the fanning hole area of the cooling fan is located on the inner side of the vertical cylinder frame on the vertical projection plane, through holes are formed in the peripheral wall of the vertical cylinder frame. The cooling fan model can be conveniently and stably supported to complete a PIV test, it is guaranteed that hot melt adhesive cannot enter the fan to damage the model, it is guaranteed that the cooling fan model can be rapidly disassembled and assembled, and meanwhile, the flow field of the cooling fan cannot be affected.

An intelligent perception system measurement test method based on image color calibration, the method is used for color defect parameter acquisition of the camera, and is used for intelligent perception test data set calibration, and the intelligent model is tested by using the calibrated data set. The method can apply the color parameters of the camera to the data through a quadratic function, obtain a test data set containing related hardware parameters, make the test of the intelligent model more close to the actual performance of the future algorithm, effectively improve the accuracy of the test result, and by comparing the test results before and after calibration, whether the current camera meets the task requirements can be effectively determined.

The invention discloses an electromagnetic disturbance simulation test method, system, equipment and medium in an extreme multi-physical environment, and belongs to the technical field of electric power engineering and measurement testing, and the method comprises the steps: electrifying a test device, obtaining extreme multi-physical environment data, generating multiple groups of test conditions, and setting test points; setting the voltage of a high-voltage source, setting an acquisition mode and a trigger value of an oscilloscope, controlling the switching frequency of a pulse transmission line to be adjusted and applied to a to-be-detected electronic transformer, drawing an I-V curve of the electronic transformer according to an acquisition result, and combining the I-V curves of the electronic transformer under multiple groups of temperature and humidity conditions, and analyzing to obtain the failure voltage and the failure current of the electronic transformer. According to the method, the performance data of the electronic mutual inductor under different temperature and humidity conditions and electromagnetic disturbance environments are comprehensively and accurately collected, the data can be deeply analyzed through a scientific and reasonable data processing method and a strict failure judgment criterion, and the performance and reliability of electronic equipment are accurately evaluated.

The invention provides an automatic calibration method and device for a detector tester, electronic equipment and a medium, and relates to the field of calibration measurement test.The initial moment T0 of a detector for obtaining a damped oscillation signal is obtained through the detector tester, and the method comprises the steps that i-M, i-M + 1 and i-M + 2 are obtained, and sample point signals x [i-M], x [i-M + 1], x [i-M + 2]... x [i] corresponding to the moment i are obtained, and calculating a filtered signal y [i-1] through a formula, when x [i] is greater than G * y [i-1] and G is a multiple of a threshold coefficient, determining a starting moment T0 of a damped oscillation signal, obtaining a damping coefficient, a natural frequency and sensitivity based on T0, and automatically calibrating a detector tester based on the damping coefficient, the natural frequency and the sensitivity. According to the method, the detector tester is automatically calibrated, complicated operation of calibration personnel is avoided, and the calibration precision and the calibration efficiency are improved.

1. The name of the design product: the universal measuring test adapter for the aviation special equipment with pull rod. 2. The use of the design product: for the aviation special equipment measuring test. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: perspective view 1.

The invention discloses a blade maximum vibration stress design method and system based on small sample test data, according to the method, after finite element models are constructed, parameters of each finite element model are adjusted, vibration localization of different degrees can be generated due to changes of the model parameters, and then the maximum vibration stress of a blade is designed. Screening out a finite element model with the maximum vibration difference between different blades, namely screening out a finite element model with the most serious vibration localization, taking the finite element model as an optimization model corresponding to each resonant frequency order, and calculating to obtain a vibration localization factor of each resonant frequency order; and calculating the actual maximum vibration stress of each resonant frequency order in the statistical sense on the basis of the vibration localization factor, so that the actual maximum vibration stress of the blade with high confidence coefficient can be obtained on the basis of small sample test data, multiple dynamic stress measurement tests are not needed, the test cost is reduced, and the efficiency is improved.

The application discloses a wind speed and direction sensor, a wind speed and direction detection device and a method, and belongs to the technical field of measurement and testing. The wind speed and direction sensor comprises a substrate, a heating component and a plurality of impedance measurement components. The substrate is internally provided with at least two cavities arranged along a first direction and at least two cavities arranged along a second direction; each cavity contains an electrolyte solution; the first direction is orthogonal to the second direction; the heating component is arranged on the upper surface of the substrate; a plurality of impedance measurement components are arranged corresponding to each cavity; wherein, for any cavity: a through hole is arranged on the upper surface of the substrate corresponding to the cavity, one end of the impedance measurement component contacts the electrolyte solution in the cavity, and the other end of the impedance measurement component extends to the upper surface of the substrate through the corresponding through hole; the impedance of the electrolyte solution monotonously changes with temperature. The embodiment of the application can effectively reduce the power consumption of the sensor and improve the detection sensitivity.

The invention relates to the technical field of in-reactor testing, in particular to a component testing mechanism and a component testing system of a loading device, the component testing mechanism comprises a mounting seat, an acting force detection assembly and a displacement recording assembly, the mounting seat is provided with a placing groove for placing a testing component, and the acting force detection assembly comprises an acting force sensor and a movable part; the acting force sensor is connected with the testing part and the movable part, the movable part is arranged on the mounting seat and can move relative to the mounting seat, the displacement recording assembly comprises a displacement sensor, a mounting rod and a measuring rod, two first avoiding openings communicated with the placing groove are formed in the mounting seat, and the mounting rod and the measuring rod are arranged at the first avoiding openings in a penetrating mode respectively. The displacement sensor is located outside the mounting seat, two ends of the mounting rod are connected with the displacement sensor and the mounting seat, and two ends of the measuring rod are connected with the test component and the mounting seat, so that the measurement test of the test component is realized, and a guarantee is provided for the use of the loading device.

The application provides a high-precision comparison measurement method and system for in-machine measurement of a five-axis machine tool, comprising: obtaining surface point data of a workpiece, and taking the workpiece with the obtained surface point data as a standard piece; symmetrically clamping the standard piece and a workpiece to be tested on a rotary table of the machine tool, ensuring that the positions of the standard piece and the workpiece to be tested are the same after being rotated by 180 degrees; measuring the surface of the workpiece to be tested according to a set measurement path; rotating the C shaft of the machine tool by 180 degrees to make the positions of the standard piece and the workpiece to be tested the same, and measuring the surface of the workpiece to be tested; using the surface point data of the standard piece obtained by a coordinate measuring machine and the in-machine measurement point data of the standard piece to calibrate the surface of the standard piece, and eliminating the machining error of the surface; and calculating the error between the workpiece to be tested and the calibrated standard piece to obtain the surface error. The application does not need additional machine tool system error detection and compensation, is simple to operate, efficient, and has significant cost-effectiveness.

The utility model is suitable for the technical field of electric power detection, and relates to a voltage-current integrated current transformer detection device, which comprises a shell unit; a tested terminal assembly and a metering test unit are arranged in the shell unit, the tested terminal assembly is mounted on the metering test unit, and the shell unit, the tested terminal assembly and the metering test unit are integrally mounted on the three-phase electric energy meter detection table body; the tested terminal assembly comprises a voltage terminal, a current terminal and a U-shaped elastic piece, the current terminal is connected with the U-shaped elastic piece, the metering test unit comprises a management MCU, a metering module and a communication module, the management MCU is in communication connection with the metering module and the communication module, and the communication module is further in communication connection with the upper computer. The current transformer detection device is simple in structure and convenient to operate, and the detection precision of the current transformer is effectively improved.

The invention provides a test device and a test method for measuring the motion response of a multi-carrier launching platform, and belongs to the technical field of water environment simulation tests. Comprising a platform shell, an elastic supporting unit, a supporting track, a transmitting assembly and a measuring mechanism. The two supporting rails are horizontally arranged on the two sides of the platform shell, a plurality of sets of elastic supporting units are arranged on the supporting rails at intervals, each elastic supporting unit comprises a fixing rod, a limiting groove and an elastic piece, the limiting grooves are formed in the supporting rails, one ends of the fixing rods are connected with the platform shell, and the other ends of the fixing rods are slidably installed in the limiting grooves. Elastic pieces are arranged between the two ends of the limiting groove and the fixing rods. The measuring mechanism is used for measuring the deformation quantity of the elastic piece. The launching assembly comprises a launching cylinder, an electromagnetic valve and a high-pressure gas cylinder, and the launching cylinder is arranged on the platform shell and connected with the high-pressure gas cylinder through the electromagnetic valve. The device can simulate launching of various carriers with high precision, truly reflect dynamic motion response of the platform, and improve accuracy and reliability of test data.

The invention discloses a pulsating pressure measuring and processing method deducting wind tunnel noise, and belongs to the technical field of wind tunnel measurement tests. The problem of inaccurate pulsating pressure measurement caused by wind tunnel noise is solved. The method comprises the following steps: arranging a 10-degree cone model in a wind tunnel, collecting a pulsating pressure value of the air wind tunnel, carrying out Fourier transform to obtain a function of the pulsating pressure of the air wind tunnel in a frequency domain, and then constructing power spectrum functions of the air wind tunnel at different frequencies; the method comprises the following steps: arranging a test model in a wind tunnel, acquiring a pulsating pressure value on the surface of a measurement model, performing Fourier transform to obtain a function of the pulsating pressure on the surface of the test model in a frequency domain, and then constructing power spectrum functions of the surface of the test model under different frequencies; selecting the same frequency to obtain the amplitude of the corresponding frequency after subtraction, and then calculating the overall pulsating pressure coefficient after the pulsating pressure value of the wind tunnel is deducted; and acquiring pulsating pressure coefficients after the wind tunnel pulsating pressure values are deducted at different pressure points on the surface of the test model until all test states are measured and calculated.

A system, method, medium, and electronic device for testing seismic data acquisition devices are disclosed. The system includes: a signal generator, a digital multimeter, at least one seismic data acquisition device, a connector, and a host computer. The signal generator generates electrical signals; the digital multimeter measures electrical parameters in the test circuit; the seismic data acquisition device performs corresponding processing operations on its input signals in its current test circuit and transmits the results of the processing operations to the host computer; the connector controls the state of each relay in the relay group to form a test circuit for the current test index; the host computer sends test control commands and determines the test results of the seismic data acquisition device for the current test index based on the received information. This disclosure facilitates convenient and accurate testing of various indicators of seismic data acquisition devices, thereby improving the testing efficiency and reliability of test results.

A measurement device that uses a measurement chip having a reaction region for detecting a test substance and measures a reaction of the test substance in the reaction region by using fluorescence, the measurement device including a measurement unit that irradiates the reaction region with excitation light and detects the fluorescence emitted from the reaction region, a mounting part to which the measurement chip is attachably and detachably mounted, a check chip for checking the measurement unit, the check chip being attachably and detachably mounted to the mounting part, and a storage part that stores the check chip and is provided at a location different from the mounting part.

This invention discloses a dual-support ventilation force measurement test device and its application method for high-speed wind tunnels, relating to the field of wind tunnel testing technology. It includes: a tail base; two support rods on both sides of the tail base; and dummy support rods fixed to the tail base. The front end of the tail base, serving as the windward surface, adopts a streamlined shape, and the rear end of the tail base is designed with a 1:10 conical connecting section. The front end of the dummy support rods is provided with a bifurcated structure for mounting multiple pressure rakes. The bifurcated structure is designed with elongated adjustment holes for adjusting the axial position of the pressure rakes, and the gap generated after axial position adjustment is filled by compensation blocks of corresponding sizes. This invention connects and fixes the dual-support ventilation force measurement test device to the wings on both sides of the model (the connection point is located after the air inlet), aiming to simultaneously solve the two major problems of multi-faceted internal flow channel encroachment and external flow field interference, and is convenient to install and has strong load-bearing capacity.

The application provides a friction and wear detection device, a characterization method and a system based on acoustic emission signals, comprising an acoustic emission clamp for a pin-on-disc friction and wear tester and an acoustic emission signal acquisition and measurement test bench; the acoustic emission clamp comprises a fixing rod, a signal connector, an acoustic emission sensor, a locking nut and a pin sample; the acoustic emission signal acquisition and measurement test bench comprises an acoustic emission sensor, a signal amplifier and an acoustic emission signal acquisition board card. The application monitors and analyzes the acoustic emission signals on the surface of the sample, reflects the changes of the sample surface in the friction and wear process in real time, thereby accurately characterizing the friction and wear performance of the sample, without disassembling the sample, and has the advantage of real-time monitoring.

The invention discloses a mutual inductor secondary voltage harmonic content measuring method, system and device, and relates to the technical field of three-phase three-element combined mutual inductor simulation, and the technical scheme is characterized in that the method comprises the steps: obtaining an excitation current curve of a Yyn0 wiring three-phase three-element combined mutual inductor under an actual operation condition; extracting excitation parameters of the excitation current curve, inputting the excitation parameters into a pre-built simulation model used for simulating an actual wiring mode of the three-phase three-element combined type mutual inductor, and outputting a secondary voltage waveform of the three-phase three-element combined type mutual inductor; and determining the harmonic content of the secondary voltage of the Yyn0 wiring three-phase three-element combined transformer under different secondary loads according to the secondary voltage waveform. Compared with an on-site measurement test platform, the method has the advantages that the measurement process is simplified, and the standard exceeding condition of the harmonic content of the three-phase three-element combined transformer can be effectively identified.

This invention provides a pipe-integrated six-component jet balance and its usage method. The jet balance features an integrally formed axial force element, a five-component element, and a support rod connector, coaxially arranged along the negative X-axis. A pipe runs through the entire balance axis, and the five-component element and support rod connector are equipped with grooves. The axial force element adopts a spoke-type structure, consisting of a moving ring, a stationary ring, and transverse and vertical sensitive beams. The five-component element comprises front and rear rectangular beams and a central cylindrical beam. The support rod connector features a conical inner cone and wedge holes. Strain gauges are mounted on both the axial force element and the five-component element to form a Wheatstone bridge, enabling independent measurement of the six components. This invention integrates the pipe into the balance body, completely avoiding interference from contact between the pipe and the sensitive element, significantly improving force measurement accuracy. The overall structure is compact, with a small diameter and light weight, facilitating calibration and installation. Its usage method is simple to install, provides stable signal output, and can efficiently complete wind tunnel jet force measurement tests.

The application discloses a kind of measurement methods of tire lateral inclination working condition vertical stiffness, including the parameter setting of vertical stiffness test in tire static stiffness testing machine, the parameters include tire pressure, vertical load and displacement loading speed;When tire lateral inclination angle γ is 0, tire vertical stiffness test is carried out, and the radial force F r of tire is collected during measurement test process and the relationship curve of with subsidence amount ρ, and the radial force F r Of tire is collected during measurement test process and the relationship curve of with subsidence amount ρ;When tire lateral inclination angle γ is not 0, tire vertical stiffness test is carried out, and the test data of different lateral inclination angle during measurement test process are collected, and the test data include radial force F r , lateral force F s And subsidence amount ρ;According to the test data obtained in step S3, the tire model formula constructed is input, and the tire vertical stiffness under each lateral inclination angle is calculated.The application designs tire model, deduces tire vertical stiffness under lateral inclination working condition, to realize accurate measurement of tire vertical stiffness under lateral inclination working condition.

The present application relates to the field of radio measurement test, specifically, a two-wheeled vehicle accident early warning system and method.The technical scheme provided by the present application aims at the incomplete coverage of rearview mirror caused by the narrow body of two-wheeled vehicle, the visual blind area formed by the imbalance of turning head in the front direction when riding, and the risk of difficult prediction of fast coming vehicle in the side rear direction, through the combination of "millimeter wave radar (front + side rear) + ultrasonic sensor (directly rear)", the core risk area of two-wheeled vehicle riding is accurately covered, and the problem of incomplete coverage of traditional single sensor is solved; through priority sorting (front collision > directly rear approach > side rear coming) and composite early warning mode, when multiple risks occur at the same time, the rider can quickly focus on the most urgent threat, and the risk avoidance efficiency is improved; and through the combination of millimeter wave radar and ultrasonic sensor, the hardware cost is controllable, and the installation does not need to modify the body structure, and is suitable for various types of two-wheeled electric vehicles.

The application discloses a kind of methods and computer program products for judging abnormal wear of end face seal, judges abnormal wear of end face seal based on multi-parameter linear programming, belongs to the field of seal anomaly monitoring, by the multiple monitoring values such as end face seal compression amount, temperature monitoring point, leakage monitoring point and pressure monitoring point in end face seal test system as characteristic value, with the temperature parameter rising rate collected as the basis, by considering the fluctuation of end face seal compression amount, leakage monitoring point and pressure monitoring point signal, the current temperature rising condition is corrected, finally compared with preset temperature rising speed threshold value, multiple analysis and determination are carried out, the accuracy of temperature anomaly determination is improved, at the same time, this method is based on an infrared end face seal measurement test device, improves the accuracy of seal surface temperature rise measurement.

The invention discloses an integrated intelligent traceability method for a composite material hydrofoil frequency locking mechanism in the technical field of hydrodynamics, and the method comprises the following steps: firstly building a synchronous measurement test platform, and synchronously collecting a wake flow field image, a three-dimensional deformation field and a vibration signal in a hydrofoil frequency locking and primary cavitation state; through data calibration and alignment, gray processing and dynamic image enhancement, vortex mode characteristics, high-confidence vibration dominant frequency and structure dominant mode are extracted by combining a 3D-DIC algorithm, dynamic mode decomposition and other technologies; a frequency triple is identified through self-adaptive spectrum analysis and intelligent association matching, vibration contribution is quantized through multi-stage verification, a structured mechanism analysis report is finally automatically output, closed loop from multi-source data to intelligent diagnosis is completed, reliable support is provided for frequency locking mechanism traceability, and the method is suitable for large-scale popularization and application. And a quantitative causal chain of vortex source-deformation-vibration is automatically established through an intelligent algorithm, so that intelligent diagnosis and mechanism analysis of the frequency locking phenomenon are realized.