17results about How to "Simple test method" patented technology

The application discloses a kind of electromagnetic relay electromagnetic attraction test method and positioning fixture, the method is positioned by positioning fixture to the electromagnetic part of the electromagnetic relay to be measured, the clearance between armature and yoke of the electromagnetic part of the electromagnetic relay to be measured is positioned in the clearance range required by the electromagnetic relay to be measured;Electromagnetic attraction is generated by the coil of electromagnetic part to load excitation, and armature is operated, the excitation value corresponding to the moment of armature operation is compared with threshold value gradually increasing from small by coil loading excitation, meets threshold value requirement, and the electromagnetic attraction of the electromagnetic part of the electromagnetic relay to be measured meets the requirement.The electromagnetic attraction test method used in the present application positions the electromagnetic part of the electromagnetic relay to be tested, and the clearance between armature and yoke is the clearance required by the product, the force tested is more in line with actual production, and whether the electromagnetic attraction of magnetic circuit part meets the requirement of final product can be effectively judged.

The present application relates to the technical field of automobile emission testing, and specifically discloses a testing method for real-time determination of excessive fueling emission of a vehicle, which comprises collecting vehicle data by using a vehicle-mounted emission detection device; arranging the vehicle data to generate a corresponding fueling emission test condition set; sorting each fueling emission test condition in the fueling emission test condition set according to the order of fueling time; calculating the pollutant emission limit value under the single fueling amount in each fueling emission test condition and the final result value of the pollutant emission test during the fueling process; and comparing and determining whether the current corresponding fueling emission test condition is excessive according to the calculated pollutant emission limit value and final result value. The present application can solve the problem that the vehicle cannot be determined and warned in time when the vehicle fueling process causes excessive pollutants.

The embodiment of the application provides a kind of inter-satellite laser link ground verification test system and method, it is related to laser communication technical field, including: laser terminal module, for emitting first light beam to parallel light pipe module, and receiving second light beam returned by parallel light pipe module;Integrated light control module includes: light source unit for emitting second light beam to parallel light pipe module, light spot measurement unit for controlling light switch unit based on received first light beam, light switch unit for switching the on-off state of the light path of light source unit to parallel light pipe module under the control of light spot measurement unit;Parallel light pipe module includes: transceiver lens group for transmitting first light beam to energy beam splitter, energy beam splitter for transmitting first light beam to light spot measurement unit after splitting, and second light beam is sent to laser terminal module by transceiver lens group, and test system structure is simple and measurement accuracy is high.

This application discloses a method and apparatus for testing the tension of metal braided wires. The method includes: constructing a tension region for the braided threads in the metal braided wire; determining the lead-in position, inflection point position, and lead-out braiding position within the tension region; determining the reference tension of the braided threads within the tension region; obtaining a target angle between the reference direction and the target direction in the braiding mechanism, using the line connecting the lead-in position and the inflection point position as the reference direction and the line connecting the inflection point position and the lead-out braiding position as the target direction; and determining the target tension based on the target angle and the reference tension. The method for testing the tension of metal braided wires in this application is simple and can accurately calculate the corresponding tension using the inclination of each braided thread. This allows for the specific numerical value to characterize the tension, enabling precise control of the tension of each braided thread during the metal braiding process.

The application discloses an electrochemical active specific surface area test method, and relates to the technical field of battery testing. The electrochemical active specific surface area test method comprises the following steps: providing a battery with an electrode sheet to be tested; determining a voltage range in which the battery performs double-layer behavior and a plurality of scanning speeds corresponding to the voltage range; obtaining CV curves of the plurality of scanning speeds in the voltage range; obtaining a plurality of integral areas corresponding to the plurality of scanning speeds according to the plurality of CV curves; one-to-one corresponding the plurality of scanning speeds and the plurality of integral areas to form a plurality of coordinate points, linearly fitting the plurality of coordinate points, and obtaining the slope of a fitted straight line; and determining the electrochemical active specific surface area of the electrode sheet to be tested according to the slope. The application can improve the accuracy of the electrochemical active specific surface area test of the electrode sheet.

This invention discloses a method, apparatus, equipment, and storage medium for testing the stress direction of a cylindrical surface with zero axial deformation, relating to the field of oil and gas field development engineering technology. The method includes the following steps: S1, taking a cylindrical core sample and obtaining its radius; S2, attaching strain gauges to both ends of the core sample, selecting a radius passing through the center of the end face as the starting point, and recording the angle between the strain gauge and this radius; S3, after attaching the strain gauges, covering the end face of the core sample with a uniform coating to create a proportionally enlarged cylindrical sample for testing, electrically connecting the strain gauges to a sensor; S4, applying hydrostatic pressure to the cylindrical sample in the radial direction and recording the data changes on the stress sensor; S5, based on the strain test results in S4, obtaining the two principal strain directions of the cylindrical sample. This method uses a small number of strain gauges to obtain the stress direction of the core sample on the horizontal plane, and the results are reliable, convenient, and low-cost.

This invention provides a temperature-compensated crystal oscillator (TCC) temperature compensation testing system and method. The system includes: a host computer; a frequency source; a high and low temperature test chamber, the host computer setting the temperature of the test chamber; and multiple test circuit boards located inside the test chamber. Each test circuit board includes an FPGA frequency measurement circuit, an ARM control circuit, and multiple TCXO test circuits. The FPGA frequency measurement circuit measures the frequency of the TCC on each test circuit board according to control commands sent by the host computer. Each TCXO test circuit acquires the frequency of the corresponding TCC at different temperatures. The ARM control circuit determines the voltage-controlled voltage (VDC) of each TCC based on the difference between the frequency of each TCC and the frequency of the frequency source. The host computer determines the compensation parameters of the TCC based on the VDC and writes the compensation parameters back to the TCC. This invention enables batch temperature compensation testing, improving testing efficiency.

The present application aims to reveal the influence mechanism of stress level and stress gradient on the behavior of metal material hot salt corrosion, and provides a force-chemical coupling test method and device of metal material considering stress gradient, aiming at the technical defects that mechanical load and corrosion environment are difficult to be controlled simultaneously in the existing research. First, a variable cross-section tensile deposited salt sample is designed, which can form different stress level and stress gradient distribution areas under a single loading condition. Second, the hot salt corrosion test under external stress is carried out under the condition of controlled temperature by artificially depositing the molten salt formed in the simulation of marine environment on the surface of the sample and applying external tensile load. Finally, the corrosion morphology, oxide film structure and element distribution of the sample are systematically characterized and quantitatively analyzed. The test method of the present application is simple, highly repeatable, can realize the comparative analysis of corrosion behavior under multiple stress states, and significantly improves the efficiency and accuracy of stress-corrosion synergistic effect research.

The invention provides a bidirectional control load box and a rapid pile foundation bearing capacity testing method, and relates to the technical field of pile foundation testing, and the load box comprises two fixing discs used for being connected with a pile body or a reinforcement cage; the back-to-back moving loading jacks are located between the two fixing discs and distributed along the axes of the fixing discs, and cylinder bodies and piston rods of the back-to-back moving loading jacks are fixedly connected with the two fixing discs respectively; the first U-shaped commutators and the second U-shaped commutators are located between the two fixing discs, a plurality of groups of the first U-shaped commutators and the second U-shaped commutators are distributed in a circumferential array at equal intervals around the axes of the fixing discs, openings of the first U-shaped commutators and the second U-shaped commutators in the same group are oppositely embedded, and the opening ends of the first U-shaped commutators and the second U-shaped commutators are detachably connected to the corresponding fixing discs; and the opposite movement loading jack is connected between the closed ends of the first U-shaped commutator and the second U-shaped commutator in the same group. All detection effects of the reverse self-balancing experiment device can be achieved, only one set of load box is adopted, and the equipment integration degree is high.

The application provides a test method for maximum pressure bearing of an electric core and application thereof and a device for testing maximum pressure bearing of the electric core, and relates to the technical field of batteries. The test method for maximum pressure bearing of the electric core provided by the application can quickly judge the upper limit of pressure that the electric core can bear according to the dynamic distribution of electrolyte under different pressure conditions, thereby providing relevant technical parameters for reserving expansion space of a module and strength parameters of a limiting structure. The test method is simple, the data is reliable, and the test method provides a quick and efficient method for setting of pre-tightening force of the electric core.

The application discloses a method for measuring the force of a pier in the floating transportation of a large floating body by considering a bias coefficient, establishes a numerical model of the pier, introduces a bias coefficient of the pier through a heading front rubber pad compression amount and a heading back rubber pad compression amount, analyzes the force of the numerical model of the pier, selects a stress characteristic point on the front of the heading of the pier, and installs a stress sensor at the stress characteristic point; then, a relationship formula between normalized stress at the stress characteristic point and the bias coefficient is established, and a relationship formula between the pressure of the pier and the stress at the stress characteristic point and the bias coefficient is established; finally, stress data of the pier in the actual process of the floating transportation of the large floating body are collected through the bias coefficient and the stress sensor, and the pressure of the pier can be obtained by back calculation according to the established calculation formula.

This invention relates to the field of building technology, and provides a test method for the resistance of asphalt to ultraviolet aging and its application. The test method includes: determining the average daily night-day time ratio k in the application area. 平均 Daytime high temperature C 光 The highest temperature at night is C 黑 and daily average radiation intensity P 平均 The asphalt to be tested was placed in an aging chamber for light exposure, followed immediately by exposure to darkness; at different time points t during the period from the start to the end of the exposure to darkness. i Infrared spectroscopy was performed on asphalt samples, and the change in the benzene ring substituent index ΔI was calculated. 平均 ; Using ΔI 平均 Calculate the diffusion rate V 扩散 ; Utilizing the diffusion rate V 扩散 V represents the resistance of the asphalt to ultraviolet aging under the climatic conditions of the application area. 扩散 The larger the value, the worse the resistance of the asphalt to UV aging in the application area. The test method of the present invention uses the diffusion rate of substances inside the asphalt, characterized by the benzene ring substituent index, to measure the resistance of the asphalt to UV aging.

The invention discloses an electromagnetic pump performance test device and a test method thereof, and belongs to the technical field of electromagnetic pump test design, the electromagnetic pump performance test device comprises an electromagnetic pump, the electromagnetic pump is arranged on a test bench, an iron core is arranged in an inner cavity of the electromagnetic pump, an annular pump groove is formed between the inner cavity of the electromagnetic pump and the iron core, and a winding coil is arranged on the electromagnetic pump and located on the outer side of the pump groove. A test tube axially arranged in the electromagnetic pump is arranged in the pump groove in a penetrating mode, a force measuring assembly is arranged at one end of the test tube, and a temperature measuring assembly is arranged outside the test tube and located in the electromagnetic pump. In the scheme, the winding coil is electrified to generate a magnetic field, the test tube simulates the actual axial force and temperature of liquid metal in the electromagnetic pump in the pump groove of the electromagnetic pump, the axial force of the test tube is measured through the force measurement assembly, and the temperature of the test tube is detected through the temperature measurement assembly. Therefore, the performance of the electromagnetic pump under different conditions is simulated, the test accuracy is improved, and the method has guiding significance for the design of the electromagnetic pump.

This invention discloses a method for determining the content of hexane extract in polyethylene, belonging to the field of analytical testing. The method comprises the following steps: Step 1: Wrapping polyethylene material with filter paper; Step 2: Placing the sample in a flask containing hexane and extracting it in a water bath; Step 3: Drying in an oven; Step 4: Weighing the total weight of the dried sample and filter paper; Step 5: Calculating the hexane extract content of the sample. This method solves the problems of insufficient applicability to various forms of polyethylene, unstable extraction efficiency, cumbersome operation, large testing errors, and low testing efficiency in existing standard methods for testing the content of hexane extract. By optimizing the sample preparation, extraction, and filtration processes, it achieves efficient and accurate determination of hexane extract in polyethylene powder, granules, and films of different forms.

This application provides a method for testing metal contamination in semiconductor structures, comprising: providing a semiconductor structure under test and a control semiconductor structure; maintaining constant voltages at the drain, source, and substrate terminals of the semiconductor structure under test and the control semiconductor structure; varying the voltage at the gate terminal of the semiconductor structure under test and the control semiconductor structure from a first preset value to a second preset value, and obtaining the relationship between the voltage at the gate terminal and the current at the drain terminal of the semiconductor structure under test and the control semiconductor structure, respectively; obtaining the transconductance of the semiconductor structure under test and the control semiconductor structure; obtaining the electron mobility of the semiconductor structure under test and the control semiconductor structure, thereby obtaining the metal contamination status of the semiconductor structure under test. The method for testing metal contamination in semiconductor structures provided in this application can qualitatively reflect the metal content at the ppb level and has advantages such as sensitivity, high efficiency, simplicity, and universality.

This application provides a bidirectional controlled load cell and a rapid testing method for pile foundation bearing capacity, relating to the field of pile foundation testing technology. The load cell includes: two fixed plates for connection to the pile or reinforcing cage; multiple opposing-moving loading jacks located between the two fixed plates, distributed along the axis of the fixed plates, with the cylinder and piston rod of each jack fixedly connected to one of the two fixed plates; a first U-shaped commutator and a second U-shaped commutator located between the two fixed plates, arranged in a circumferential array at equal intervals along the axis of the fixed plates, with the openings of the first and second U-shaped commutators in the same group interlocking and their open ends detachably connected to the corresponding fixed plates; and opposing-moving loading jacks connected between the closed ends of the first and second U-shaped commutators in the same group. This application achieves all the testing effects of a reverse self-balancing experimental device and uses only one load cell, exhibiting high equipment integration.

The application discloses a wireless charging auxiliary calibration testing device and testing method, which comprises an installation platform, a calibration coil array and a controller. The upper or lower part of the installation platform can be placed with a to-be-tested transmitting end. The calibration coil array comprises a plurality of calibration coil frames installed on the installation platform and corresponding to the calibration coil frames of the transmitting end. The controller can control each calibration coil frame of the calibration coil array to be sequentially turned on. The testing device and testing method can calibrate and test each auxiliary function of the transmitting end of the wireless charging system. The testing method is simple, convenient and efficient, and can ensure the normal operation of the transmitting end of the wireless charging system.