38results about How to "The test results are close to" patented technology

The invention relates to a device and a method for testing the adhesive property between a fiber reinforce plastic (FRP) rib and concrete under a complicated stress state. The device is characterized by comprising a vertical outer frame (1), a vertical inner frame (2) and a transverse frame (3); after being clamped by the transverse frame (3), a test piece (22) is clamped in the vertical inner frame (2); the vertical inner frame (2) is then clamped in the vertical outer frame (1); the FRP rib (23) of the test piece (22) passes through a top plate of the vertical outer frame (1) and is then connected with a tensile testing machine; a bottom pull rod (7) arranged at the lower end of the vertical outer frame (1) is connected with the tensile testing machine; and the stress direction of the test piece (22) is opposite to that of the bottom pull rod (7). The device and the method are simple and practicable, and an ideal experimental device is provided for the pull-out test in the complicated stress state.

The invention discloses a comprehensive testing device for coal bed strain, seepage, displacement and flow jetting. The comprehensive testing device comprises a coal core chamber, a vibrator, an ultrasonic wave generator, a methane gas source, a seepage and displacement gas source, a hand rocking pump, a specific resistance determinator, a gas storing tank, a gas control valve, a bursting disc assembly, a releasing cylinder, a pressure sensor, a high-pressure valve, a drying agent, a gas flowmeter, a strain measurement sealing container and a strain gauge. Meanwhile, the invention further provides a comprehensive testing method for coal bed strain, seepage, displacement and flow jetting. The method comprises the steps of equipment leakage testing, high-pressure gas seepage testing, high-pressure gas displacement testing, high-pressure gas flow jetting testing, specific resistance determining testing and high-pressure strain measuring. The comprehensive testing device is used for carrying out testing of successfully cracking a coal sample after gas seeps a coal core, meanwhile, coal sample gas displacement testing, specific resistance determining of the coal core under high pressureand gas seeping, and coal bed high-pressure strain measuring can be carried out, and therefore the test result is closer to the true situation.

The invention relates to a method for calculating insulin action factor based on non-invasive blood glucose detection model of energy metabolism conservation method. The method includes the step thatthrough oral glucose test combined with insulin release test, a BP neural network structure based on MATLAB platform is used to predict and train the four insulin evaluation indicators. By adjusting the number of nodes in different hidden layers, and selecting transfer functions with different hidden layers and output layers, the training results have the strongest generalization ability and the most reliable predicting results.

The invention provides an actual-working-condition-based precision retention test device and method of a ball screw pair. The device comprises a lathe bed, a sliding saddle, a work table, a force applying mechanism, a hydraulic station, a lubrication mechanism, a console and a ball screw pair test piece. The lathe bed, the sliding saddle, the work table, and the console employ lathe bed parts matching the ball screw pair test piece that is connected between the sliding saddle and the work table. The force applying mechanism is arranged on the ground and is connected with the work table. A circular grating ruler is arranged at the tail of the ball screw pair test piece. A linear grating ruler is arranged on the work table. A proportional valve or a servo valve is arranged in the hydraulic station. In addition, the method includes the following steps that: the running length or running time of the ball screw pair test piece is set by the console; the ball screw pair test piece is operated; after operation ending, the operation precision of the ball screw pair test piece is measured by using the circular grating ruler and the linear grating ruler; the operation and measurement processes are repeated until the operation precision is lost completely; and on the basis of the obtained operation precision data, the precision retention rule of the ball screw pair test piece is studied.

The invention discloses a device for evaluating the reliability of a wheel structure. The device comprises a vibration platform, a support mechanism for mounting a wheel, sensors and a control unit; the wheel is mounted on the support mechanism; the support mechanism is mounted on the vibration platform; the sensors are mounted on the wheel and joints between the wheel and the support mechanism; the vibration platform is electrically connected to the sensors and the control unit; the support mechanism includes a bottom plate, a support base and a shaft clamp, wherein the support base is arranged on the bottom plate, the bottom plate is arranged on the vibration platform, and the shaft clamp is connected to the support base; one end away from the bottom plate, of the support base has a groove I for mounting an axle of the wheel; a groove II for clamping the axle is correspondingly formed in the shaft clamp; and the groove II and the groove I match each other to fix and clamp the axle. The invention discloses a method for evaluating the reliability of a wheel structure, which can simulates a long life test, an impact test and a functional random vibration test in the longitudinal, lateral and vertical directions.

The invention relates to the technical field of electrochemical detection, and especially relates to a test method of an electrochemical sensor. The test method can be used to accurately judge whethersample introduction is correct or not during the detection of a sample to be tested by adopting the electrochemical sensor, can significantly reduce a deviation between a detection value and a real value, allows the measured value to be accurate and reliable, and effectively solves the problem of inaccurate detection of existing detection methods.

The invention belongs to the technical field of marine testing, and relates to a sea wind wave dynamic load test device and method. A model box is arranged in the middle of a base. Four reaction forcecolumns are vertically arranged at four corners of the base. A horizontal circular track is arranged among four reaction force columns. Pulleys of a sliding block are fixed on the horizontal circulartrack. One end of a frequency conversion motor is connected with a servo load system, and the other end is fixed on the sliding block. A servo motor is fixed on the sliding block. An oil pump is connected with the servo motor. A servo load controller is arranged on one side of the base and is connected with the oil pump. An information transmitter is connected with a control system and an information processor through data lines. The information processor is connected with a six-degree-of-freedom information collector through a data line. The six-degree-of-freedom information collector is arranged in the middle of the horizontal circular track. The sea wind wave dynamic load test device has the advantages of simple structure, easy operation, high degree of automation, safety, reliabilityand quick test, and is free of manual assistance.

The invention belongs to the technical field of experimental research in civil engineering reinforcement, and discloses a steel plate clamp and method for an FRP plate reinforcement test, an upper steel plate clamp and a lower steel plate clamp are adjusted, so that the upper steel plate clamp and the lower steel plate clamp rotate to prevent eccentric influence in the loading process; the double-shear test piece composed of the FRP pasted on the two sides through bolt holes formed in the two ends of an upper steel plate clamp and a lower steel plate clamp, and inserting clamp bolts in the bolt holes is fixed, so as to prevent the double-shear test piece composed of the FRP pasted on the two sides from shaking in the fatigue loading process; bolt holes are formed in the middle of the upper and lower steel plate clamps, bolt rods are inserted into the bolt holes, and the upper and lower steel plate clamps are tightened and fixed through nuts, so that the centering deviation of the double-shear test piece consisting of the upper and lower double-sided pasted FRP in the fatigue loading process is prevented. The bearing capacity can be improved by 3-4 KN under the same condition, and it is guaranteed that the test result is highly close to the actual situation. According to the method, reinforcing guiding significance can be obtained, and high theoretical and economic values are achieved.

The invention discloses an intraocular pressure detecting device and method based on a laser speckle pattern principle. The device comprises a laser source module used for emitting a laser beam to aneye to be detected, an image sensing module used for capturing time-varying dynamic images of a speckle pattern formed by the laser beam reflected by the eye to be detected, and an image processing module used for processing the dynamic images to obtain a speckle pattern displacement amplitude and determining the intraocular pressure of a subject based on the speckle pattern displacement amplitude. According to the device, the speckle pattern formed by reflecting the laser beam from an eyeball is captured and analyzed, the intraocular pressure detection can be performed effectively, timely andaccurately according to the corresponding relationship between the displacement amplitude of the speckle pattern and the intraocular pressure value, physical contact with the subject is not needed, and the device can be widely used in the detection of intraocular pressure related diseases.

The invention relates to a site-in-the-loop test system and test method oriented to the vehicle-road cooperation technology, and belongs to the technical field of vehicle-road cooperation test. The system comprises a perception fusion layer, a data transmission layer and an application layer, and point cloud data are recorded and played back to form a virtual test environment; and according to the method, the tested vehicle can interact with the virtual vehicle in the virtual test environment in the site, various extreme scenes are repeatedly drilled, so that the test method with consistency and repeatability is constructed, a convenient, efficient and low-cost test scheme is provided for the V2X to-be-tested vehicle/equipment, and the test result is closer to the performance in the real environment.

The invention discloses a bending stress detection device for inspecting a composite material automotive leaf spring product. The bending stress detection device comprises a main tank body, wherein adetection bin is welded in the main tank body, and two hydraulic cylinders and two stepping motors are arranged on the outer surface of the upper end of the detection bin; clamping seats are welded totwo sides of the inner surface of the detection bin, preserved screw holes are formed in the upper and lower ends in the detection bin in a penetration manner, and hydraulic columns penetrate throughthe inside of the hydraulic cylinders. According to the bending stress detection device, a to-be-detected composite leaf spring can be fixed in multiple directions, the adverse influence caused by unsteady fixation to the detection can be prevented, and the to-be-detected composite leaf spring can be sectionally detected, so that the accuracy of a detection result can be improved; and the operation environment of the composite leaf spring on an automotive can be relatively truly simulated, so that the detection result is relatively close to a real result.