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41results about How to "The measurement method is simple and fast" patented technology
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Measuring method for leakage of hydraulic system and its application
InactiveCN1869626AEasy to calculateRich management toolsMeasurement of fluid loss/gain rateLine tubingWorking pressure
The invention is a method for measuring internal leakage of a hydraulic system, comprising the steps of: (1) using original hydraulic energy storage device at hydraulic station or on main pressure pipeline in the hydraulic system, or connecting special measuring hydraulic energy storage device into the system; (2) firstly measuring actual pre-charged gas pressure P0 of the energy storage device and able to obtain effective gas volume V0 according to specification of the energy storage device or actually measure it; (3) then letting the hydraulic system reach normal working pressure, stopping the system from do work to outside, turning off the working pump at the hydraulic station, letting the energy storage device singly supply oil to the system, and recording starting time t1, and initial pressure P1 as well as some middle time t2 and corresponding pressure value P2; (4) by formula, calculating internal leakage of the hydraulic system. And the method is simple and convenient and has strong universality.
Owner:NINGBO BAOXIN STAINLESS STEEL
Ultrasonic cavitation pressure measuring device and measurement method thereof
InactiveCN101419108ASolve cavitation corrosion problemsTrue cavitation pressureFluid pressure measurement by acoustic meansMeasurement deviceUltrasonic cavitation
The invention discloses a device and a method for measuring the supersonic cavitation pressure. The device is as follows: a sensor is arranged on a support; a measuring surface faces to a supersonic generator probe; and a signal line is connected with the input end of an amplifier the output end of which is connected with a data acquisition device. The method is to arrange the sensor in water to adjust the distance of the probe and the sensitivity of a charge amplifier, to select a gain measuring range, acquires electrical signals outputted by the charge amplifier, to start a supersonic generator to measure, record and store voltage data, to convert an obtained data curve of voltage and time so as to obtain the supersonic cavitation pressure value. The method performs quick, instant, dynamic, multi-point, long-term and real-time monitoring and acquisition on the data, breaks through the limitation of the prior monitoring method, and can measure the instantaneous value or the mean value. The device has large rigidity as for a structure, is simple, convenient, reliable and accurate, and has high natural frequency. The device and the method are suitable for variation research of physical properties and the chemical properties of liquid which is subjected to phonochemical reaction, equipment cavitation erosion and so on.
Owner:TAIYUAN UNIV OF TECH
Aluminum liquid horizontal measurement method and tool
InactiveCN101329192ASimple structureReduce manufacturing costLevel indicators by physical variable measurementDemarcation pointEngineering
The invention relates to a measuring method and the measuring tool of aluminum liquid level in an electrolytic tank in the aluminum electrolytic production. The measuring method uses a standing edge board of the electrolytic tank with uneasy deformation as a reference plane and a reference zero point 0, the distance from the reference zero point 0 to the upper surface of a cathode carbon block inside the electrolytic tank is set to be L1, a reference level rod of the measuring tool is hanged over the reference plane, a measuring crooked chisel that is vertically fixed with the reference level rod is inserted into the aluminum liquid of the electrolytic tank and then pulled out, and consequently the distance L2 from the reference zero point to a level demarcation point between the electrolyte and the aluminum liquid is measured, and the level height of the aluminum liquid H is calculated by subtracting L2 from L1. The vertical measuring crooked chisel of the measuring tool has the length of H1, wherein, H1 is less than L1 and more than L2. The measuring method of the invention is convenient, simple and fast, uses the measuring tool with simple structure and low cost, is applicable to the production working of various aluminum electrolytic tanks, has high measurement precision, accurate measured data and reinforced guidance to the aluminum electrolytic production, and consequently improves each economic technical index of the aluminum electrolytic production.
Owner:FUSHUN ALUMINUM
Capacitor measuring system and measuring method thereof
PendingCN107543972APromote accumulationImprove articulationResistance/reactance/impedenceCapacitanceMeasurement cost
The invention discloses a capacitor measuring system and a measuring method thereof. The system comprises a charging current source which charges a capacitor to be measured, a comparator group whose input end is connected to a first end of the capacitor to be measured, the capacitor to be measured which provides an initial comparison voltage value which is a voltage value Vcap of the capacitor tobe measured to the comparator group, a latch whose input end is electrically connected to an output end of the comparator group, and a counter group which is connected to the output end of the latch and is used for counting a period of a level signal outputted by the latch, wherein a first output end of the latch is correspondingly connected to a first control switch, a second output end of the latch is connected to a second control switch. The system and the method have the advantages of a simple circuit structure, a simple and convenient measurement method, low measurement cost and high measurement precision.
Owner:ESPRESSIF SYST SHANGHAI
Method for measuring spot size of multi-element infrared ray shaft temperature detector
InactiveCN102353521AHigh measurement accuracyThe measurement method is simple and fastTesting optical propertiesBlack bodyMulti element
The invention provides a method for measuring a spot size of a multi-element infrared ray shaft temperature detector. The method comprises the following steps of: 1, arranging the detector and a black body on a T-shaped guide rail; 2, adjusting the central height of the detector and the black body; 3, starting the black body and the detector, and receiving a response signal; 4, continuously moving the black body, and recording a corresponding signal; 5, when the response signal is not generated, stopping moving the black body; 6, drawing the response signal and a corresponding black body position; and 7, acquiring the spot size. By the method for measuring the spot size of the multi-element infrared ray shaft temperature detector, the size of a spot can be accurately measured, and the measurement accuracy can at least reach the magnitude of 0.5cm and is obviously improved; and the measurement method is simple and quick, is rich in information amount and can be used for measuring the sizes of the spot of the detector in different directions.
Owner:BEIJING CTROWELL INFRARED TECHN
Method for monitoring fatigue of operator and safety helmet
InactiveCN106889996AThe measurement method is simple and fastReduce casualtiesSensorsPsychotechnic devicesReliability engineering
The invention discloses a method for monitoring the fatigue of an operator. The method includes the following steps that a power switch of a safety helmet is turned on, and the safety helmet collects infrared radiation energy emitted by the head of the operator; the safety helmet converts the collected infrared radiation energy into temperature information; the safety helmet judges whether the head temperature information of the operator meets a preset condition or not; when the safety helmet judges that the temperature information meets the preset condition, the safety helmet outputs preset fatigue alarming information, wherein the preset condition of the temperature information refers to the head temperature information of the operator when the operator in a normal healthy sate. The invention further discloses the safety helmet, according to the method and the safety helmet, the fatigue condition of the operator can be monitored in real time, and therefore the method and the safety helmet are of great significance to reduce accidents.
Owner:CHINA JILIANG UNIV
Method for measuring thicknesses of plating layers in electronic element with compound metal plating layers
The invention discloses a method for measuring the thicknesses of plating layers in an electronic element with the compound metal plating layers. The method includes the following steps of firstly, preparing a culture substrate; secondly, determining an influence factor delta of the metal plating layers made of material M; thirdly, conducting measurement. By means of the method, the accurate measurement of the thicknesses of the compound metal plating layers in the electronic element can be achieved, especially when two metal plating layers made of the same material are included in the compound metal plating layers of the electronic element, the measurement method is easy and convenient to implement, cost is low, and result repeatability is high.
Owner:FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
Measurement method for accuracy of currency rolling tape and measurement system thereof
InactiveCN106802130AGuaranteed pass rateThe measurement method is simple and fastUsing optical meansStopped workCounting Number
The invention belongs to the technical field of accuracy measurement, and provides a measurement method for the accuracy of a currency rolling tape and a measurement system thereof. The measurement method comprises the following steps that a. the currency rolling tape is wound on a jig, the currency rolling tape is set to be in the light transmitting state and a motor is started so that the motor is enabled to drive the currency rolling tape to rotate through a test shaft; b. whether the state of the currency rolling tape is converted into the shading state from the light transmitting state is detected, the step c is performed if the judgment result is yes, or the motor is started again; c. the counting number of sensor chips and the perimeter of the test shaft are acquired, and the length of the currency rolling tape is calculated according to the counting number of the sensor chips and the perimeter of the test shaft; and d. whether the length of the currency rolling tape is within the preset threshold range is judged, the currency rolling tape is qualified if the judgment result is yes, or the motor is controlled to stop working and a buzzer is controlled to alarm. Therefore, the effect of accurately measuring the length of the currency rolling tape can be realized, and the qualified rate of the currency rolling tape can be guaranteed. The measurement method is convenient and easy to operate without artificial intervention for measurement so that labor and material resources can be saved.
Owner:SHENZHEN YIHUA COMP +2
Method for measuring internal resistance of marine Ag/AgCl electric field sensor
ActiveCN105092979AThe measurement method is simple and fastAccurate measurementResistance/reactance/impedenceElectric field sensorInternal resistance
The invention discloses a method for measuring an internal resistance of a marine Ag / AgCl electric field sensor. The method is characterized by comprising the following steps of soaking a pair of electric field sensors into NaCl solution with a concentration of 3.5% for 2-3 days, after a voltage difference is stabilized, measuring the voltage difference V1 of the electric field sensor by a data acquisition instrument; serially connecting a DC power supply, a variable resistance box, an ammeter and an electric field sensor, and parallelly connecting the data acquisition instrument with the electric field sensor; switching on the circuit, and recording the reading number V2 of the data acquisition instrument and the reading number A of the ammeter; and calculating a changing value between the previous voltage and the later voltage according to a formula U= the absolute value of (V2-V1), and obtaining the internal resistance R of the pair of the electrodes according to Ohm's law R=U / I= the absolute value of (V2-V1) / A. The method provided by the invention has advantages of controllable magnitude of the current which runs over the electric field sensor in measurement, no damage of the electric field sensor, short measurement time and no polarization of the electric field sensor.
Owner:OCEAN UNIV OF CHINA
Determination method for lignosulfonic acid sodium salt capacity for resisting to electrochemical oxidation
InactiveCN104062332AImprove solubilityEasy to testMaterial electrochemical variablesElectrochemistrySodium salt
The invention discloses a determination method for lignosulfonic acid sodium salt capacity for resisting to electrochemical oxidation. The determination method includes the following steps that a lignosulfonic acid sodium salt to be determined is dissolved in pure water, wherein the mass of the lignosulfonic acid sodium salt is M; an ultrafilter is used for separating and collecting a solution which does not pass through an ultrafiltration membrane; the solution is dried; the dried sample is dissolved in a sodium hydroxide solution of 0.1 mol / L-0.2 mol / L, and then sulfuric acid of 1.28 ml-1.34 ml is added into the solution and mixed evenly; a prepared solution is contained into an electrolytic tank with a PbO2 membrane type electrode being an anode and pure lead foil being a cathode, and the solution is electrolyzed; after electrolysis, filtering is performed, and a gel filtration chromatography device with a differential refraction detector and an ultraviolet spectrum detector is adopted for measuring the electrolyzed solution.
Owner:ZHEJIANG TIANNENG BATTERY JIANGSU
Measurement method for azimuth angle test of microwave guide equipment
ActiveCN106767677AAvoid the limitations of choiceThe measurement method is simple and fastTheodolitesMeasurement testTheodolite
The invention provides a measurement method for an azimuth angle test of microwave guide equipment. The method comprises the steps of arbitrarily selecting a point from a coverage range of the microwave guide equipment and arranging ground-special angle measurement equipment and an angle measurement test antenna; selecting any position at which an azimuth antenna and the angle measurement test antenna of the microwave guide equipment can be watched for arranging a theodolite; obtaining the center of the azimuth antenna, any auxiliary point on the plane of the azimuth antenna and the position of the center of the angle measurement test antenna by using the theodolite; calculating a horizontal angle of the angle measurement test antenna relative to the center of the azimuth antenna; and comparing the horizontal angle with azimuth angle data provided by the ground-special angle measurement equipment for the difference to judge the accuracy of the microwave guide equipment, thereby judging whether the indicator of the microwave guide equipment reaches the standard or not. According to the measurement method, the performance index of the microwave guide equipment can be more accurately and conveniently tested.
Owner:NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
Shoulder-back pressure regulator for pupil schoolbag and design method of pressure regulator
InactiveCN106096167AMeet needsThe measurement method is simple and fastGeometric CADTravelling sacksData acquisitionPupil
The invention provides a design method of a shoulder-back pressure regulator for a pupil schoolbag. The method comprises the steps that data collection is conducted on dynamic and static shoulder-back pressures produced when the pupil schoolbag bears a load of 15% by means of an mFLEX pressure distribution testing system, and images of the dynamic and static shoulder-back pressures are extracted respectively; the area, salient point positions and salient point sizes of pressure regulators for a soft-pad schoolbag are drawn, wherein the designed pressure regulators are formed by two pressure regulators for the shoulders and one pressure regulator for the back, at least four pressure regulation salient points are distributed on one face of each pressure regulator for the shoulders, and at least eight pressure regulation salient points are distributed on one face of the pressure regulator for the back. The shoulder-back pressure regulator not only can relieve the pain, caused by the heavy load and unreasonable structural design of the pupil schoolbag, of the spine, the shoulders, the back and the like, but also can avoid the influence on growth and development of the pupils to some extent; the design pressure regulator is simple in structure, easy to machine and manufacture and convenient to apply and popularize.
Owner:SICHUAN UNIV +1
Load capacity measuring method and device of construction vehicle
InactiveCN110646072ARealize automatic measurementThe measurement method is simple and fastFluid pressure measurementSpecial purpose weighing apparatusOil pumpHydraulic pressure
The invention provides a load capacity measuring method and device of a construction vehicle. The method comprises the steps of: obtaining a pressure measurement value in a hydraulic oil pipe during ajacking process of the construction vehicle, wherein the hydraulic oil pipe is connected with a hydraulic oil pump for controlling to jack up the construction vehicle; drawing a curve according to the pressure measurement value in the hydraulic oil pipe, and determining a final pressure value in the hydraulic oil pipe according to the curve; and obtaining a load capacity measured value of the construction vehicle according to a predetermined function relationship between the final pressure value in the hydraulic oil pipe and the load capacity measured value of the construction vehicle. By adopting the load capacity measuring method and device provided by the invention, automatic measurement of the load capacity of the construction vehicle is realized, the measuring method is simple and convenient, and the test efficiency is high.
Owner:WUHAN YIXUN ELECTRONICS INFORMATION TECH
Methylated-beta-cyclodextrin, preparation method, characterization method and application thereof
ActiveCN112062877AThe average degree of methylation substitution is stableEasy to transfer outAnalysis using nuclear magnetic resonanceCyclodextrin coatingsAlkaneCyclodextrin
The invention discloses methylated beta-cyclodextrin, a preparation method, a characterization method and application thereof. The methylated beta-cyclodextrin has an average substitution degree of 11.4-12.6 and a melting range of 181-185 DEG C, and is obtained by methylating BCD through a methylation reagent and crystallizing through an alkane solvent, wherein preferably the methylation reagent is DMS. According to the invention, the average methylation substitution degree of the methylated beta-cyclodextrin prepared by the preparation method provided by the invention is about 12(+ / -5%), theyield is high, the preparation method is simple, the conditions are mild, the average substitution degree is stable, and the characterization method can simply, quickly and accurately characterize theaverage substitution degree of MBCD.
Owner:PTG ADVANCED CATALYST CO LTD
Measuring method for leakage of hydraulic system and its application
InactiveCN100425964CEasy to calculateRich management toolsMeasurement of fluid loss/gain rateLine tubingWorking pressure
Owner:NINGBO BAOXIN STAINLESS STEEL
Method for measuring eccentricity of regular hexagonal cross section shaft
ActiveCN110906901AThe measurement method is simple and fastHigh measurement accuracyMeasurement devicesPhysicsDeflection angle
The invention provides a method for measuring the eccentricity of a regular hexagonal cross section shaft. The eccentricity of the regular hexagonal cross section shaft can be accurately and conveniently measured by using a flat-folding tappet type detection mechanism. One end of the flat-folding tappet type detection mechanism abuts against the hexagonal shaft and is located below the to-be-detected section of the hexagonal shaft, and m a displacement sensor is placed below the other end of the detection mechanism; the hexagonal shaft is rotated, the detection mechanism swings around the rotation center along with the hexagonal shaft, and the displacement sensor records the swing displacement value of the detection mechanism in real time; and a function relational expression between the predicted eccentricity and deflection angle and known parameters and displacement sensor indication values is deduced according to the geometrical relationship of each part and mathematical transformation. The measuring method is simple and convenient, the measuring precision is high, and an effective solution is provided for engineering problems such as hexagonal shaft straightness measurement andhexagonal shaft straightening.
Owner:JILIN UNIV
Red wine semi-finished product motion detection system for real-time image analysis
PendingCN113284116AEfficient and accurate detection and purificationImprove qualityImage enhancementImage analysisPattern recognitionParallel algorithm
The invention discloses a red wine semi-finished product motion detection system based on real-time image analysis. A background difference method is improved, the current image and the background image difference are used for detecting the motion foreground, and a motion target detection algorithm based on background modeling is adopted; the method is composed of video acquisition, conversion of a dynamic image sequence, preprocessing, background modeling, foreground detection and extraction of a motion background, image processing of residues is identified by applying selective filtering, homomorphic filtering, wavelet multi-scale edge detection and a surface area calculation method, and a parallel algorithm DSP real-time image detection system is used, so that the detection speed can be greatly improved, a more reliable, convenient and efficient measurement method is provided for red wine semi-finished products, the measurement method is simple and rapid, the measurement result is accurate, the device is not easy to damage and age under heavy interference and corrosive conditions, and the system has good real-time performance, flexible system architecture, convenient control interface, huge practical value and wide application prospect.
Owner:荆门汇易佳信息科技有限公司
Vehicle anti-splash system installation angle measuring device and measuring method
PendingCN110631460AWide range of measurement applicationsThe measurement method is simple and fastAngles/taper measurementsMeasurement deviceEngineering
The invention discloses a vehicle anti-splash system installation angle measuring device. The vehicle anti-splash system installation angle measuring device includes a guide rail assembly, an angle positioning assembly and a horizontal auxiliary positioning assembly installed on a bracket; the guide rail assembly includes a horizontal guide rail and a vertical guide rail connected in parallel to astand pole of the bracket; the horizontal guide rail is horizontally arranged and is slidably connected to the vertical guide rail through a vertical sliding block; a center positioning rod of the angle positioning assembly is fixedly connected to a vertical sliding block II; the center positioning rod is arranged horizontally and faces the front of the bracket; an angle positioning rod providedwith a horizontal angle ruler is installed at one end of the center positioning rod through a bearing, and the upper end is connected to an auxiliary round rod; the horizontal auxiliary positioning assembly includes a positioning round rod I and a positioning round rods II, and the positioning round rod I and the positioning round rods II are slidably installed on the left and right sides of the horizontal guide rail through a horizontal sliding block I and a horizontal sliding block II separately; and the positioning round rod I and the positioning round rods II are arranged horizontally andface the front of the bracket. The vehicle anti-splash system installation angle measuring device has the advantages of compact and stable structure, light weight, easy to carry, simple and fast measuring method, accurate measurement result and wide application range.
Owner:广西壮族自治区汽车拖拉机研究所有限公司
Method for carrying out in-situ measurement on precipitation amount of Fe3C in low-carbon alloy steel
ActiveCN108535309AThe measurement method is simple and fastImprove test accuracyMaterial thermal analysisCarbon alloyTest facility
The invention provides a method for carrying out in-situ measurement on precipitation amount of Fe3C in low-carbon alloy steel, belonging to the technical field of metal material testing. The method comprises the steps of firstly, processing a solid solution-treated low-carbon alloy steel sample to be tested into a steel internal friction test sample, and then installing the internal friction testsample in internal friction test equipment; rapidly heating up to 350 DEG C from room temperature and then immediately cooling down, and measuring an SKK peak in the process of cooling to room temperature; in the third step, measuring the SKK peak, subjected to the heat treatment, of the solid solution-treated steel internal test sample; after that, cooling the internal friction test sample, which is obtained in the third step and is subjected to heat treatment, to the room temperature and then rapidly heating up to a target temperature T0, carrying out heat preservation for a period of timet2, and measuring the SKK peak in the process of cooling to the room temperature from 350 DEG C; treating the internal friction curves, obtained from the measurement at different temperature preservation time, of the sample by repeating the process of step 4, determining the precipitation amount of the Fe3C according to the strength of the SKK peak so as to obtain the dynamic characteristic of theprecipitation of the carbide Fe3C. The method provided by the invention is simple to operate, easy in sample preparation, high in measurement accuracy and rapid in speed.
Owner:CHANGZHOU DONGFANG SPECIAL STEEL
A Measuring Method for Axial Eccentricity of Regular Hexagonal Section
ActiveCN110906901BThe measurement method is simple and fastHigh measurement accuracyMeasurement devicesEffective solutionGeometric relations
Owner:JILIN UNIV
Method for evaluating photoresist photoetching efficiency based on quartz crystal microbalance
ActiveCN112129237AIncreased sensitivityThe measurement result is accurateAnalysing fluids using sonic/ultrasonic/infrasonic wavesUsing optical meansQuartz crystal microbalancePhysical chemistry
The invention provides a method for evaluating photoresist photoetching efficiency based on a quartz crystal microbalance. The method comprises the following steps of: firstly, enabling photoresist topass through a QCM (Quartz Crystal microbalance) chip, and adhering the photoresist to the surface of the chip; then, putting the chip adhered with the photoresist into a light-transmitting module, selecting an irradiation light source to carry out exposure treatment on the photoresist on the surface of the chip, meanwhile, collecting the change of a QCM signal, and determining the sensitivity ofthe photoresist by utilizing a time length between a moment when the signal changes and the exposure treatment; and analyzing the contrast ratio of the photoresist by utilizing a time length betweenthe moment when the signal changes and a moment when the signal becomes constant. The measurement method is simple and convenient, and the contrast ratio and the sensitivity of the photoresist can bedynamically evaluated in real time.
Owner:JIANGSU UNIV
Method for measuring volume of catalytic converter carrier
InactiveCN103776506AEliminate Volume EffectsThe measurement method is simple and fastContainer/cavity capacity measurementChemistryTitration
The invention discloses a method for measuring volume of a catalytic converter carrier. The measurement method specifically comprises the following steps: 1, completely putting an irregular catalytic converter carrier into an underwater container filled with water, so as to enable the water in the container to overflow; and 2, titrating to supplement the lost water in the container due to overflowing by a titration apparatus, and recording the water amount consumed by titration so as to measure the volume of the catalytic converter carrier. The method for measuring the volume of the catalytic converter carrier is simple and rapid, the volume of the irregular catalytic converter carrier is measured without collecting the overflowing water in a mode of supplementing the overflowing water through titration, the volume influence of a preservative film is eliminated by putting the preservative film into water before titration, and both the measurement accuracy and efficiency are high.
Owner:GUANGXI YUCHAI MASCH CO LTD
A vehicle wheel center measurement device and measurement method
ActiveCN112361968BGuaranteed measurement accuracyThe measurement method is simple and fastUsing optical meansEngineeringMechanical engineering
The present application relates to the technical field of vehicles, in particular to a vehicle wheel center measuring device and method. The vehicle wheel center measurement device includes: a mounting base, a height adjustment structure and a first laser pointer, a second laser pointer, an intermediate laser pointer and a displacement structure installed on the mounting base, wherein the first laser pointer, The second laser pointer and the middle laser pointer respectively have a first laser emitting end whose emission direction is perpendicular to the installation base, and the first laser pointer and the second laser pointer are arranged symmetrically on the middle laser pointer On both sides, the displacement structure is used to control the equidistant displacement of the first laser pointer and the second laser pointer in opposite directions along the line connecting the centers of the first laser pointer and the second laser pointer, so The height adjustment structure is used to adjust the height of the installation base. The vehicle measuring device has the advantages of simple structure, convenient and quick measurement, and high measurement accuracy.
Owner:CHERY AUTOMOBILE CO LTD
Method for measuring the thickness of individual coatings in electronic components with composite metal coatings
ActiveCN105444706BAccurate measurementThe measurement method is simple and fastUsing wave/particle radiation meansMetal coatingElectronic component
The invention discloses a method for measuring the thicknesses of plating layers in an electronic element with the compound metal plating layers. The method includes the following steps of firstly, preparing a culture substrate; secondly, determining an influence factor delta of the metal plating layers made of material M; thirdly, conducting measurement. By means of the method, the accurate measurement of the thicknesses of the compound metal plating layers in the electronic element can be achieved, especially when two metal plating layers made of the same material are included in the compound metal plating layers of the electronic element, the measurement method is easy and convenient to implement, cost is low, and result repeatability is high.
Owner:FIFTH ELECTRONICS RES INST OF MINIST OF IND & INFORMATION TECH
A Method for Measuring the Average Radiation Impedance of Hydroacoustic Piezoelectric Transducers in Non-Anechoic Pools
ActiveCN104793056BThe method is efficient and fastThe test conditions are easy to meetResistance/reactance/impedenceAuditory radiationElectricity
The invention discloses a method for measuring the average radiation impedance of an underwater acoustic piezoelectric transducer in a non-nechoic pool. Measure the electric admittance of the hydroacoustic piezoelectric transducer in the air, the electric admittance in the anechoic pool and the electric admittance at N measurement positions in the non-anechoic pool to be tested; determine the hydroacoustic piezoelectric transducer Internal resistance, content and static admittance; determine the mechanical impedance of the transducer; determine the dynamic impedance of the transducer at N measurement positions in the non-anechoic pool to be tested; determine the transducer according to the mechanical impedance and dynamic impedance The average radiation impedance of the transducer in the non-anechoic pool to be tested. The invention can indirectly measure the average radiation impedance of the hydroacoustic piezoelectric transducer in the non-nechoic pool through the measurement of electric admittance, the measuring equipment only needs an impedance analyzer, the measuring method is simple and fast, the testing cost is low, and it has great practicality value.
Owner:HARBIN ENG UNIV
A shoulder and back pressure regulator for schoolbags for primary school students and its design method
InactiveCN106096167BMeet needsThe measurement method is simple and fastGeometric CADTravelling sacksData acquisitionEngineering
The invention provides a design method of a shoulder-back pressure regulator for a pupil schoolbag. The method comprises the steps that data collection is conducted on dynamic and static shoulder-back pressures produced when the pupil schoolbag bears a load of 15% by means of an mFLEX pressure distribution testing system, and images of the dynamic and static shoulder-back pressures are extracted respectively; the area, salient point positions and salient point sizes of pressure regulators for a soft-pad schoolbag are drawn, wherein the designed pressure regulators are formed by two pressure regulators for the shoulders and one pressure regulator for the back, at least four pressure regulation salient points are distributed on one face of each pressure regulator for the shoulders, and at least eight pressure regulation salient points are distributed on one face of the pressure regulator for the back. The shoulder-back pressure regulator not only can relieve the pain, caused by the heavy load and unreasonable structural design of the pupil schoolbag, of the spine, the shoulders, the back and the like, but also can avoid the influence on growth and development of the pupils to some extent; the design pressure regulator is simple in structure, easy to machine and manufacture and convenient to apply and popularize.
Owner:SICHUAN UNIV +1
Cathode protection parameter detection method and equipment for buried pipeline and storage medium
PendingCN114250475ASolve the problem of inaccurate measurementEffective protectionAC - Alternating currentComputational physics
Owner:GUANGZHOU GAS
A measurement method for azimuth angle inspection of microwave guidance equipment
ActiveCN106767677BAvoid the limitations of choiceThe measurement method is simple and fastTheodolitesMeasurement testTheodolite
The invention provides a measurement method for an azimuth angle test of microwave guide equipment. The method comprises the steps of arbitrarily selecting a point from a coverage range of the microwave guide equipment and arranging ground-special angle measurement equipment and an angle measurement test antenna; selecting any position at which an azimuth antenna and the angle measurement test antenna of the microwave guide equipment can be watched for arranging a theodolite; obtaining the center of the azimuth antenna, any auxiliary point on the plane of the azimuth antenna and the position of the center of the angle measurement test antenna by using the theodolite; calculating a horizontal angle of the angle measurement test antenna relative to the center of the azimuth antenna; and comparing the horizontal angle with azimuth angle data provided by the ground-special angle measurement equipment for the difference to judge the accuracy of the microwave guide equipment, thereby judging whether the indicator of the microwave guide equipment reaches the standard or not. According to the measurement method, the performance index of the microwave guide equipment can be more accurately and conveniently tested.
Owner:NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
A method and system for measuring the refractive index of a prism
ActiveCN110749423BThe measurement method is simple and fastAvoid tedious and complicated adjustment processPhase-affecting property measurementsSpeed measurement using gyroscopic effectsGyroscopeRefractive index
Owner:SHANGQIU NORMAL UNIVERSITY
Method and system used for measuring refractive index of prism
ActiveCN110749423AThe measurement method is simple and fastAvoid tedious and complicated adjustment processPhase-affecting property measurementsSpeed measurement using gyroscopic effectsGyroscopeMinimum deviation
The invention discloses a system used for measuring refractive index of a prism. The system comprises a light source, a measuring mechanism and a collimation part, wherein the measuring mechanism comprises a shell, a gyroscope sensor, a clock module, a central processing module and a display module; the gyroscope sensor, the clock module and the central processing module are respectively arrangedinside the shell, and the shell is provided with a measurement wall; the gyroscope sensor, the clock module and the display module are electrically connected with the central processing module, tedious measurement of a spectrometer on a refraction angle and a minimum deviation angle of the prism is replaced, and a manual computation process is eliminated, so that a measurement process is simple and quick. The invention discloses a method used for measuring the refractive index of the prism. A gyroscope and the central processing module are utilized for calculating the refraction angle and theminimum deviation angle of the prism, and the central processing module is utilized for calculating the refractive index, so that measurement on related angles of the prism and calculation on the refractive index are conveniently realized.
Owner:SHANGQIU NORMAL UNIVERSITY
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