41results about How to "The measurement method is simple and fast" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The embodiment of the invention discloses a cathode protection parameter detection method and device for a buried pipeline and a storage medium, and the method comprises the steps: carrying out the frequency division of a pipeline potential signal of the buried pipeline through a high-pass filter, and obtaining a power frequency AC interference signal; performing frequency division on the pipeline potential signal by adopting a low-pass filter to obtain a composite signal of a direct-current signal and an extremely-low-frequency alternating-current interference signal; frequency division is carried out on the composite signal by adopting a digital filtering technology, so that a direct-current signal and an extremely-low-frequency alternating-current interference signal are obtained through separation; performing frequency division on the composite signal by adopting a power-off measurement method to obtain an effective direct-current protection potential signal; determining a direct-current interference signal according to the difference between the direct-current signal and the effective direct-current protection potential signal; power frequency alternating current interference signals, extremely low frequency alternating current interference signals, effective direct current protection potential signals and direct current interference signals are detected and output at the same time. The method has the advantages of convenience, rapidness, accuracy, comprehensiveness and wide application range, and can be widely applied to the field of buried pipeline protection.

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.

The invention discloses a prism refractive index measurement system, comprising a light source, a measurement mechanism and a collimating member. The measurement mechanism comprises a casing, a gyroscope sensor, a clock module, a central processing module and a display module; the gyroscope sensor, the clock module, the central The processing modules are all arranged inside the casing, and the outer casing is provided with a measuring wall; the gyroscope sensor, the clock module, and the display module are electrically connected to the central processing module, which replaces the tedious measurement of the prism refraction angle and the minimum deflection angle by the spectrometer, and saves the The manual calculation process is simple and fast; the invention discloses a prism refractive index measurement method, which uses a gyroscope and a central processing module to calculate the prism refraction angle and the minimum deflection angle, and uses the central processing module to calculate the refractive index, Thus, the prism-related angle measurement and the calculation of the refractive index are conveniently realized.

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.