317results about How to "The test data is accurate and reliable" patented technology

The invention discloses a numerical simulation determination method of a deep high-stress roadway drilling pressure relief parameter. Before simulation is carried out, a test roadway surrounding rock sample is firstly subjected to a loading and unloading test in a laboratory, an attenuation relationship between a rock sample strength parameter and a damage variable is obtained by fitting and is embedded into a FLAC<3D> (Fast Lagrangian Analysis of Continua) built-in strain softening constitutive model, and an actual measurement mine pressure expression law of a test roadway is taken as a known characteristic value to carry out inversion on the numerical calculation model parameter of a rock mass. A deep roadway drilling pressure relief numerical calculation model is established to simulate and analyze the influence law of a pressure relief drilling orientation, pressure relief opportunity and drilling parameters (diameter, length and inter-row spacing) on the stability of roadway surrounding rock, and a determination method of each factor which affects a pressure relief effect is put forward, and a drilling pressure relief technology system is perfected. The numerical simulation determination method considers the mutual action relationship of a pressure relief degree and the stability of the surrounding rock while pressure relief drilling parameters are determined, and the designed pressure relief drilling can perform a maximum pressure relief effect on a premise that the stability of the surrounding rock is guaranteed. The method is simple and exhibits high application value.

The invention discloses a rock mass structural surface shear test method, which comprises the following steps of firstly, cutting a rock mass test piece into a cuboid and marking a vertical axis line and a horizontal axis line; then adjusting an adjusting rod, fixing the rock mass test piece by a movable steel baffle, enabling the vertical axis line of the rock mass test piece to coincide with the vertical axis line of a normal loading mechanism, enabling the horizontal axis line of the rock mass test piece to coincide with the horizontal axis line of a shear loading mechanism, and enabling the structural surface of the rock mass test piece to be located above the movable steel baffle; carrying out grading force application on the rock mass test piece by the normal loading mechanism from the vertical direction, and carrying out grading force application on the rock mass test piece by the shear loading mechanism from the horizontal direction; receiving the force application data of the normal loading mechanism and the shear loading mechanism and the displacement values of a normal displacement sensor and a horizontal displacement sensor by a computer, and analyzing and calculating the data. The invention also provides a rock mass structural surface shear test device. According to the invention, the stress bearing condition of a rock mass in the reality can be simulated, and test data are accurate and reliable.

The invention belongs to the technical field of marine equipment, and particularly relates to a marine splash environment simulation test device, wherein stringed testing cable holes are arranged in the upper part of one side surface of the box-structured test box, a frame-structured drive pull rod is arranged on the other side, a splash plate angle adjusting rod is arranged at the lower part, and a splash plate is formed at the inner end of the splash plate angle adjusting rod; sensors and water inlets are arranged on the side surface of a liquid area from top to bottom; a gas exhaust opening, a ventilating and moisture exhausting device, an infrared heating lamp and a box temperature sensor are fixedly and sequentially arranged on the top side surface of the test box body from right to left; and a ultraviolet lamp, an air blower, a nozzle, a water spray pump, a liquid level controller, a dissolved oxygen sensor and a water drain opening are arranged on the opposite side of the test box corresponding to the side surface provided with the drive pull rod. The marine splash environment simulation test device has simple structure and higher automation degree, is convenient to operate, needs no staff attendance, and can simulate marine splash environment in a laboratory, so as to analyze and evaluate the corrosion and aging of the material.

The invention discloses a testing device of soil body II-type fracture damage. A front stop iron and a thrust providing device are respectively connected to two ends of a base, and the front stop iron or the thrust providing device is in sliding connection with the base; the power output part of the thrust providing device is connected with one end of a load sensor, and the other end of the load sensor is connected with a thrust plate; the signal output ends of the load sensor and a displacement sensor are both connected to a computer; the load sensor detects a load applied to a test sample; and the displacement sensor detects the deformation of the test sample in a test. The invention has the beneficial effects that the loading state of the test sample in the whole testing process is kept as a pure II-type, and the damage to the test sample is II-type fracture damage, thereby ensuring that the test data is accurate and credible, and facilitating the later mechanical analysis.

The invention discloses a device for detecting 80C31 single event effect. A power module supplies power for a main detecting CPU and a detected 80C31; a current acquisition card acquires the current supplied for the detected 80C31 and sends the acquired current value to a host computer; when the current value exceeds the preset threshold value, latch happens; the host computer sends command to the power module and a power module 0 disconnects power of the detected 80C31; the main detecting CPU receives codes of test program from the host computer through a serial port and writes the received codes in SRAM; the detected 80C31 reads the codes from SRAM and operates the test program according to the read codes as well as stores the program operation results in a double-port RAM temporarily; the main detecting CPU extracts the operation results from the double-port RAM and sends the results of occurrence of single event upset to the host computer. The invention realizes the online downloading and revision of the test program with complete test contents and high device reliability.

The invention provides a constitution method of comprehensive reliability testing profile for both software and hardware. The method is used for reliability testing of an embedded system and includes the steps of system analysis, system task analysis, system flow analysis, core profile constitution, probabilistic information determining and software-hardware reliability profile combining. A hardware reliability profile and a software reliability profile are constituted and are sectioned, sections are combined on the basis of a task combing point and a time combining point, and accordingly the profiles are effectively combined. By the constitution method, true service condition of the embedded system can be truly embodied, reliability test data of the tested embedded system, which is generated on the basis of the comprehensive test profiles, is more reliable and more adaptable to reliability testing of systems, and the constitution method can be used for failure analysis for the tested embedded systems.

The invention relates to a simulation experiment apparatus used for testing drawing force of an anchor pole and an application method thereof. The experiment apparatus comprises a testing box and a tester. The testing box comprises a box body (13); rock and soil materials (14) placed in the box body, wherein the rock and soil materials are used for testing; the testing anchor pole (18) which is inserted in the center of the rock and soil materials (14); and a contacting slice (15) arranged on the anchor pole (18). The tester comprises a pedestal (11), and a casing (13) arranged on the pedestal (11). One side of the pedestal (11) is provided with a vertical tube (9); a vertical stick is arranged on the vertical tube (9); a first cross bar (2) is arranged on the vertical stick (3), wherein one end of the cross bar (2) in inserted into the top of the vertical stick (3), and the other end is welded with a fixed pulley (23); a cross pipe (7) is arranged at the middle of the vertical stick (3); a second cross bar (16) is inserted in the cross pipe(7); and a dial gauge (19) is arranged on one end of the second cross bar (16). The apparatus possesses following beneficial effects comparing with existing technologies: the apparatus is capable of realizing a complete and realistic simulation of the drawing force mechanism of the anchor pole, providing more accurate and full experiment data for the design of actual anchor pole parameters, and ensuring the safety in practical applications.

The invention discloses a service life ground test method for an ion thruster. By using the ground test method, a ground service life test for the iron thruster can be performed for a long time. According to the ground test method, service life ground test equipment is built first of all, the performance of the ion thruster after working for a long time is tested on the basis of the simulation space condition of the test equipment, and accordingly actual results of the service life of the ion thruster can be obtained, and real and reliable test data are provided for evaluation of the service life and the reliability of the thruster. Main performance parameters of the ion thruster in the whole service life can be obtained through substantive tests in the test process, and the change rule of the performance parameters of the thruster along with accumulative working time is further obtained; the basis for long-service-life working and application of the ion thruster is provided, and essential data can be obtained for more effective acceleration tests of the iron thruster in future. The test method is effective and reliable, and the economic cost and the time cost of the service life test are greatly lowered.

The invention provides a novel super-hard TiB2/c-BN nano multi-layer film, a method for preparing the same and application thereof, wherein the method comprises the followings steps of: depositing 40 to 70 nanometers of TiB2 serving as a transitional layer on an Al2O3(111) substrate, and alternately depositing h-BN and TiB2 to prepare a nano multi-layer film, wherein the layer thickness in each modulation period is 20 to 25 nanometers, the modulation period of the multi-layer film is 8 to 32 layers, the total layer thickness is 500 and 800 nanometers, and a modulation ratio of the h-BN to the TiB2 is 1:3 to 1:16. The novel super-hard TiB2/c-BN nano multi-layer film has the desirable comprehensive characteristics of high hardness, low internal stress, small frictional coefficient and high film-substrate bonding strength; and the novel super-hard TiB2/c-BN nano multi-layer film has important application prospects in surface strengthening films of knife blade tools and dies.

The invention relates to a drive unit for rotating an outer ring and fixing an inner ring of an airplane wheel bearing. The drive unit is composed of a motor, a clutch, bearing seats, a drum wheel, a wheel axle and a coupler. The wheel axle is installed at the two bearing seats; and one end of the wheel axle is connected with a flange arranged at one end of the clutch by the coupler. The drum wheel is installed at the wheel axle by a key and is between the two bearing seats; and the external circumferential surface of the drum wheel rubs against the circumferential surface of a rubber wheel installed at a loading device in a cooperative mode. The rubber wheel is sleeved at the outer ring of the tested bearing. A brake plate is fixed at one end surface of the rubber wheel by a flange; and the braking disc of the brake plate is arranged at a braking clamping plate of a brake. The upper end of the brake is fixed at the lower surface of a loading substrate of the loading device. According to the invention, the working situation of the wheel bearing of the airplane in a sliding state can be simulated; and the bearing load is large and the rotating speed is fast. Therefore, the provided drive unit can be applied to various bearing testing machines.

The invention provides a test tool for a steel plate spring suspension system and a test method thereof. The test tool mainly comprises an iron floor, a gantry frame, various brackets and four servo hydraulic systems, wherein the iron floor is used for fixing the steel plate spring suspension system; the four servo hydraulic systems are used for applying loads to the steel plate spring suspension system. During testing, the four servo hydraulic systems are used for applying vertical, transverse and longitudinal loads to the steel plate spring suspension system, and two of the servo hydraulic systems are used for applying vertical loads. According to the test tool for the steel plate spring suspension system, a road test signal driving spectrum can be input through a control system, and the four servo hydraulic systems are controlled to apply loads to the steel plate spring suspension system in order to simulate the stress condition of the steel plate spring suspension system in an actual road test process, so that test data have good reference and are used for testing fatigue features of parts to be tested, and a reliable test measure is provided for the development and test verification of parts.

Disclosed are car body intensity fatigue and an airtight fatigue test stand. The car body intensity fatigue and the airtight fatigue test stand comprise a car body tested for a train, a longitudinal loading device, a vertical loading device and a plurality of shock excitation devices installed below the car body. The shock excitation devices are six degree of freedom shock excitation devices. The six degree of freedom shock excitation devices, the longitudinal loading device and the vertical loading device are installed in a pit through a vibration isolation device. Air vents of the car body are connected with an airtight device. The vibration isolation device specifically comprises a rectangular basin shaped base inner bottom is connected with base plates of the six degree of freedom shock excitation devices through a T-typed guiding rail. The longitudinal loading device and the vertical loading device are fixed on the upper surface of a side edge of the base. The side edge of the base is connected with a wall of the pit through a buffering rubber-metal pad. The lower surface of the base is connected with a step of the pit through an air spring. Intensity fatigue test can be carried out. Full-scale car body airtight fatigue test can be completed. The car body intensity fatigue and the airtight fatigue test stand are low in testing cost, high in testing efficiency, authentic and reliable in testing results. Influences towards the surrounding environment are small when the car body intensity fatigue and the airtight fatigue test stand are tested.

The invention provides a testing device for testing the fire resistance of a column support full-scale reinforced concrete two-way slab and an implementation method thereof. The testing device mainly comprises a furnace body, a support column, a counterforce loading device and a data acquisition system, wherein the furnace body is arranged under a reinforced concrete two-way slab; the counterforce loading device is arranged above the reinforced concrete two-way slab; the reinforced concrete two-way slab is arranged on the support column; and the data acquisition system is arranged on the reinforced concrete two-way slab and the furnace body. The testing device can carry out better fire test of the column support full-scale reinforced concrete two-way slab to simulate actual fire to carry out fire-tolerant test, test the fireproof limit of the column support full-scale reinforced concrete two-way slab and carry out research on the working mechanism of the slab in fire; therefore, the testing device provides a basis for structural design based on fire safety.

A method for testing force-sensing includes analyzing finite element of component to be tested to obtain strain parameter of finite element, selecting out nominal optimized sticking-position combination of strain foil gauge from said strain parameters, sticking strain foil gauges on positions listed in said sticking-position combination as per specific angle to form Wheatstone bridge, lading electric charge on component to be tested and comparing calculated bridge voltage difference with actually measured bridge voltage difference and testing optimized sticking-position combination of strain foil gauge according to comparison result, applying said combination at on-site for selecting out most optimum one.

The invention discloses a large-scale in-situ triaxial shearing test device and a method thereof, which belong to the technique of testing mechanical properties of soil in the field of geotechnical engineering. The device includes a sample (10), a confining pressure system (20), a vertical pressure system (30), a reaction force system (40) and an automatic data acquisition system (50); For the sample (10), the vertical pressure system (30) and the reaction force system (40) are respectively set above and below the confining pressure system (20), and the vertical displacement meter of the automatic data acquisition system (50) is set on the sample ( 10) Inside. Compared with the prior art, the present invention can maintain the original structure of the sample; can apply confining pressure to the sample to reproduce the in-situ stress field of the measured soil; can destroy the soil along its weakest surface; the sample size is large , to reduce the size effect. The invention has the characteristics of being true and comprehensive in studying the shear strength of the soil, and the test data is reliable, which can provide a strong guarantee for the design and construction in the field of geotechnical engineering.

The invention discloses an asphalt mixture aging test method. The method comprises the steps that: a short-term aging hot-mixed asphalt mixture sample is obtained with a hot-mixed asphalt mixture accelerated-aging method specified by highway engineering asphalt and asphalt mixture testing procedures; the short-term aging hot-mixed asphalt mixture sample is obtained, and a testing method and testing equipments same as those of a pressure-aging-vessel-accelerated asphalt aging test specified by the highway engineering asphalt and asphalt mixture testing procedures are adopted, and an asphalt mixture long-term aging test is carried out; the performances of the long-term aging hot-mixed asphalt mixture obtained by the test is compared with the performances of an original non-aged asphalt mixture, such that the aging degree of the hot-mixed asphalt mixture can be accurately determined. With the testing method provided by the invention, the performance aging condition of the asphalt mixture after long term use in an actual environment can be simulated, such that the aging performance or the anti-aging ability of the asphalt mixture can be accurately determined.

The invention discloses a method and a device for testing corrosion fatigue of welding nodes of an orthotropic steel bridge deck. The method comprises: 1) assembling a corrosion environment box, manufacturing a long cross welding test piece and arranging a fiber grating sensor; 2) performing a fatigue test on the long cross welding test piece; 3) carrying out a long cross welding test piece corrosion test; 4) establishing a time matching relation of a corrosion-fatigue coupling action process; 5) installing a corrosion environment box and a water mist releaser; 6) long cross welding test piececorrosion-fatigue coupling test data acquisition. The device constructed according to the method comprises the long cross welding test piece, the corrosion environment box, the water mist releaser, afatigue testing machine, a monitoring device and corrosion paste. A device used for executing the method provided by the invention is also provided. According to the method, coupling effect of corrosive media and alternating stress is fully considered, the method is closer to the service environment of the steel bridge welding node in service, and the test data is more effective and reliable; meanwhile, the device is simple and easy to operate, convenient to operate, low in cost and easy to popularize.