56results about How to "Effective test method" patented technology

The invention relates to a road test structure and method of automobile skylight wind vibration noises. The test structure comprises a wind speed signal acquisition unit and an automobile speed signal acquisition unit. The test structure is characterized in that the output ends of the wind speed signal acquisition unit and the automobile speed signal acquisition unit are respectively connected with the input end of a real speed generating unit; and the output end of the real speed generating unit is divided into two paths, wherein one path is connected with the input end of a signal processing unit through the real speed generating unit, and the other path sequentially passes through an in-automobile cavity, a noise generating unit and a noise acquisition unit, and then is connected to the input end of the signal processing unit. With the test structure adopted, the objective data of the automobile skylight wind vibration noises can be obtained in an actual road in most direct manner, and the test data can be analyzed through acoustic software, and a frequency characteristic which with changes speed and assist in generating maximum wind vibration noises is calculated; and the reading of an anemometer in a uniform working condition is determined as real speed corresponding to wind vibration noise generation and is adopted as objective evaluation. The method has the advantages of simple operation, low cost, strong applicability and the like.

The invention provides an automobile rolling noise test system and noise test method, and belongs to the field of mechanical vibration and noise measurement. Radiation noise of tires, rolling noise of channels between the tires and a cab and vibration data of the automobile tires are tested in an anechoic chamber under two situations; and if the radiation noise data and the vibration magnitude detected in two times of testing are within a set fluctuation range, rolling noise acquired by two times of measurement is compared, and the difference value of two times of rolling noise is calculated to be the contribution value of all components or partial components of a chassis system to rolling noise. With application of the method, degree of contribution of vibration of the whole or partial components of the chassis system to vibration noise in the automobile can be achieved, separation of structural transfer and air transfer of rolling noise can be realized, and the test method is a comprehensive, direct, rapid and effective test method including common conditions of the automobile. The test system applied by the method is simple in structure and has high universality, and only the position of a chassis body separation device requires to be adjusted according to different automobile models so that cost is low.

The invention discloses a robot automatic production line experiment platform and a control method thereof. The robot automatic production line experiment platform is characterized in that three parallel-connected conveying belts of different conveying directions and cylinder push rods are arranged in the experiment platform to realize cyclic conveying operation of workpieces and packing boxes; image information and attitude information of the workpieces are acquired by adopting an industrial visual system; workpiece picking and packing operation is performed by adopting a robot and the grabbing hands thereof; workpiece unloading operation is performed on piece loading boxes by adopting slide stands and the grabbing hands thereof; and different settings are performed via the platform so that operation of different working modes is realized. Experiment means are provided to verification of research, simulation and control methods of different working modes on the production line, and the experiment device is also provided to the related teaching research.

The invention provides a continuity testing method of cement mortar for 3D (Three Dimensional) printing of a building. A device for the continuity testing method is vertically arranged and comprises apushing rod (1) in an extruding barrel and a rear cover (6) which sleeves the pushing rod (1), wherein the pushing rod (1) is pushed into the extruding barrel (2); a gasket (5) is put into the extruding barrel (2) before the pushing rod (1) is put; the rear cover (6) is fixed at the upper end of the extruding barrel (2); the extruding barrel (2) is fixed on a fixed bracket (4); a straight ruler (3) is fixed on the fixed bracket (4); a zero scale line of the straight ruler (3) and the lower end of an extruding nozzle of the extruding barrel are located on the same horizontal line. Compared with the prior art, the cement mortar for the 3D printing of the building is tested and a quantification numerical value index related to continuity performance can be obtained; the continuity of the mortar for the 3D printing is accurately evaluated. The continuity testing method has the advantages that the proportion of the cement mortar for the 3D printing is easy to design, the blending time of amaterial before printing is shortened, wastes of the material are reduced and the working efficiency is improved.

The invention discloses a three-dimensional simulation method for exploiting a super-heavy oil reservoir through an FUSE technology. The method is implemented under the true triaxial loading conditionand comprises the following steps of target stratum simulation, stress loading, hydraulic expansion, steam circulating process simulation and heavy oil extracting and exploiting process simulation. Asimilar material and natural oil sand are adopted to simulate the stratum, stress loading is conducted to restore the true reservoir stratum stress environment, and oil sand reservoir stratum hydraulic expansion is conducted through a high-pressure water pump and a pre-buried stainless steel pipe; temperature data of different time and stratum positions are collected through a temperature sensor;the communication performance of double horizontal wells and the developing situation of the expansion area are detected; then, high-temperature steam injection circulation operation is conducted through a steam generator, temperature data are collected through a temperature sensor, and real-time monitoring of steam cavity expanding is achieved; and after the reservoir stratum temperature reachesthe transferring temperature, heavy oil exploiting is conducted through an external negative-pressure extracting exploiting system. The three-dimensional simulation method provides an effective testing measure and method for studying the mechanism of exploiting the super-heavy oil reservoir through the FUSE technology.

The invention provides an airplane front landing gear outer cylinder support rod connector traction takeoff static force testing method which comprises the following steps: according to a bearing situation of an outer cylinder support rod connector, confirming a key stress part and a strain piece pasting position of the outer cylinder support rod connector; detecting a strain piece, and ensuring that the survival rate of the strain is 95% or greater in loading measurement; manufacturing a sample part of the outer cylinder support rod connector, mounting the sample part on a clamp, and exertinga load; implementing loading testing, including pre-testing and official testing, exerting a limit load of 60% from a limit load of 5% step by step in pre-testing, implementing 100% limit load testing once and implementing 150% extreme load testing once in official testing, exerting loads according to the 5% limit load step by step in the 100% limit load testing, exerting loads for the former 100% limit loads according to 5% limit loads step by step and exerting loads for the later 50% limit loads according to 2% limit loads step by step in the 150% extreme load testing, and judging that theouter cylinder support rod connector is qualified in the static force testing if the sample part is not damaged in the testing. By adopting the static force testing method provided by the invention, the fatigue properties and the service lives of partial structures are verified in advance by testing test parts, and the research cost is reduced.

The invention provides a radiation EMI testing method based on a GTEM cell. According to the method, the horizontal radiation field intensity and the vertical radiation field intensity of a standard tested object with a frequency point of f0 in a radio wave dark room are firstly calculated, then, the horizontal polarization equivalent radiation field intensity and the vertical polarization equivalent radiation field intensity of a total power algorithm and a Lee algorithm of the standard tested object in a wide field are calculated respectively, a phase compensation and calibration factor corresponding to the frequency point of f0 is calculated according to a formula, the phase compensation and calibration factor and the horizontal polarization equivalent radiation field intensity and the vertical polarization equivalent radiation field intensity of a total power algorithm and a Lee algorithm of any tested equipment are plugged into the formula, and then, the testing result of any tested equipment in the wide field can be obtained. According to the testing method, on the basis of the total power algorithm, the Lee algorithm is used for phase compensation, so that the problem of lower accuracy of a testing result due to the fact that the phase factor is not considered when the total power algorithm is used alone and errors are caused by approximate hypothesis when the Lee algorithm is used alone is solved.

The invention relates to a device and method for measuring vacuum degrees in hollow glass microbeads. The device comprises a measuring cavity, hollow glass microbeads, a container, an extrusion piston, a hydraulic motor, a thermocouple, an absolute pressure meter, a precision piston, a differential pressure meter, a balance valve, a reference cavity and the like. Since the vacuum glass microbeadsare stacked in a powder manner and the powder stack not only contains gas in the hollow glass microbeads but also contains stacking gaps between the hollow glass microbeads, the measurement of the vacuum degrees in hollow glass microbeads is realized by two steps: firstly, testing the porosity of the stacked powder; and secondly, testing the internal pressures of the hollow glass microbeads. According to the invention, a large number of stacked hollow glass microbeads are broken; and difficulties of high measurement difficulty and low measurement precision of a single micro-nano vacuum container are eliminated by measuring the pressure change in the whole cavity.

The invention discloses a neutron measurement method for studying the microstructure of a brittle material. The method realizes the measurement of a small-angle neutron scattering signal of the brittle material under different strains in a Brazilian test developing process by reasonably configuring multiple measuring devices, arranging a relative positional relationship among the measurement devices and introducing a discrete strain calculation technology, and can effectively ensure the consistence of a neutron measurement area in a measured sample in different strain states. The method is used together with a small-angle neutron scattering spectrometer to carry out the Brazilian test on ceramics, polymers and other brittle materials and online detect the microscopic deformation, crackingdamage and damage process of the material, so the analytic study of the mechanical properties and the damage mechanism of the material are facilitated.

The invention discloses a method for testing the performance of four doors and one cover of a pure electric vehicle. A test bench is included, the test bench is composed of a mechanical system, an electrical control system and a measurement and control system, the mechanical system comprises an engine cover opening and closing mechanism and a side door opening and closing mechanism, the engine cover opening and closing mechanism comprises a support body, a rotating module composed of an air cylinder driving mechanism, a simulation mechanical arm and an internal and external unlocking mechanism is arranged in the support body, and the electrical control system comprises a control computer, a data acquisition card, a current sensor, a position sensor, a force sensor, an electromagnetic valve, an air cylinder, a sensor power supply, a circuit breaker and a contactor. By arranging the side door opening and closing mechanism and the engine cover opening and closing mechanism, four doors and one cover of different vehicle types can be tested, and meanwhile, the testing method is convenient, feasible and effective.

The invention discloses a device testing performance of a glass lifter of a pure electric vehicle, which comprises an electrical control cabinet, a vehicle door glass lifter performance test bench and a vehicle door glass lifter durability test bench. The vehicle door glass lifter durability test bench and the vehicle door glass lifter performance test bench carry out basic performance and durability detection on the vehicle electric real vehicle door glass lifter. The invention provides a convenient, feasible and effective testing method, systematized testing can be carried out by cooperatively using testing equipment, various performances of the window glass lifter can be detected in a unified manner, unified data statistics is facilitated, and the detection efficiency is greatly improved.

The invention provides an aircraft front undercarriage outer cylinder bracing joint traction take-off fatigue test method which comprises the following steps that an outer cylinder bracing joint testsample piece is subjected to a static strength test; a fatigue test is conducted, loads in X,Y and Z directions are harmoniously applied, a sinusoidal wave cyclic loading mode with the stress ratio of0.06 is adopted, and the loading frequency is 2 Hz; and the fatigue test is conducted in two stages, specifically, as for the first stage, the cyclic number of times of load applying is 7500, a visual test is conducted every 500 times, if the fatigue damage phenomenon occurs, the test is stopped, parameters are recorded, if not, the test piece is subjected to damage detection, and after the testpiece is qualified, the fatigue test enters into the second stage; and as for the second stage, the cyclic number of times of load increasing is 7500-15000, the visual test is conducted every 500 times, if the fatigue damage phenomenon occurs, the test is stopped, parameters are recorded, if not, the test is continued till the end, and the cyclic number of times is recorded. According to the aircraft front undercarriage outer cylinder bracing joint traction take-off fatigue test method, by testing the test piece, the fatigue property and the life of a local structure are verified in advance, and the development cost is reduced accordingly.

The invention discloses a brake input pressure measurement sensor for a disc brake. The sensor comprises a bearing plate and a support plate, wherein the bearing plate and the support plate are connected with each other and form an I-shaped structure; two grooves are respectively formed at the front side and the rear side of the support plate; the front groove and the rear groove are respectively provided with two blind holes, a strain gauge is posted on the bottom surface of each blind hole, the front groove and the rear groove are mutually symmetrical, and the four blind holes are symmetrical at front and back as well as at left and right; the strain gauges arranged at the same side are symmetrically posted, and the strain gauges at the front and back symmetrical positions are posted along the reverse directions; a tension strain part and a compression strain part of each strain gauge are sequentially arranged along the vertical direction; the four strain gauges are connected with one another by cables and form a full-bridge strain circuit; a socket is arranged at the middle position of the groove formed at the front side of the support plate; an input end and an output end of the full-bridge strain circuit are connected with the socket respectively by a cable. The sensor is accurate in measurement, and can simulate the structural size of a real automobile brake disc by means of the overall structure, thus providing an effective testing means for studying the performance of an automobile disc brake and a brake pad.