213results about How to "Improve test success rate" patented technology

The invention discloses a heating device for a Hopkinson pressure bar test, which comprises a movable supporting platform, a tubular heating furnace and an electric control box. The tubular heating furnace is mounted on a sliding plate of the movable supporting platform. Two groups of sliding rails and a plurality of fixed sliding beads are arranged on the upper surface of the sliding plate. Two alundum tubes are symmetrically sleeved at two ends of a heat-resistant steel tube. Heat-resistant bricks are respectively built around the external surfaces of the joints of the two alundum tubes and the heat-resistant steel tube. The heat-resistant bricks are provided with through holes for mounting silicon carbide rods. Insulating linings are sleeved on the external surfaces of a hearth and the heat-resistant bricks. Positions where inner cavities of the insulating linings correspond to the through holes on the heat-resistant bricks are all provided with mounting holes of the silicon carbide rods. Aluminum silicate fibrous carpets package the external surfaces of the insulating linings. A furnace shell is packaged on the external surfaces of the aluminum silicate fibrous carpets and the insulating linings. A base is fixed on the furnace shell. Two heat-insulating covers are respectively mounted in the hearth from hearths at two ends, and end cover bolts are fixed at two ends of the furnace shell. In the invention, the tubular heating furnace can move in the up-and-down direction, the leftward-rightward direction and the frontward-backward direction of the platform, and the heating device has the characteristics of good heat-insulating performance and convenience in repair.

The invention discloses a blade separator and an engine containment test device, relates to the aero-engine technology field and solves technical problems of a low test success rate and time/effort consuming existing in the prior art. The blade separator comprises an explosive, a storage chamber and a control device, wherein the storage chamber is arranged at a blade tenon outer wall or a groove inner wall of a wheel disc, the explosive is embedded in the storage chamber, and the control device is used for detonating the explosive to separate a blade into at least two parts through explosion of the explosive. The engine containment test device comprises the blade separator. The blade separator and the engine containment test device are used for improving a success rate of containment tests.

The invention discloses an automatic vertical press connecting structure for an FOG liquid crystal screen. The automatic vertical press connecting structure comprises a bottom plate, a carrier and a press connecting device. A groove for containing and limiting a liquid crystal screen to be detected and a guide groove for guiding and limiting an FPC of the liquid crystal screen to be detected are formed in the surface of the carrier. The press connecting device comprises a clamping part, a driving part and a signal transmitting part; the clamping part comprises a clamping fixed part fixedly connected with the carrier and a clamping movable part movably connected with the clamping fixed part, and the signal transmitting part comprises a signal adaption probe and a signal line; the guide groove guides the FPC of the liquid crystal screen to be detected to the clamping part, and the driving part drives the clamping movable part to clamp or release a connector of the liquid crystal screen to be detected; the signal adaption probe is arranged on the clamping movable part and can be connected with the connector of the liquid crystal screen to be detected, one end of the signal line is connected with the signal adaption probe, and the other end of the signal line is electrically connected with a control terminal. The automatic vertical press connecting structure has the automatic control function and is accurate in location, high in precision and capable of lightening the liquid crystal screen during each time of connection, so that the testing efficiency is greatly improved, and the screen clicking success rate is greatly increased.

The invention provides a network speed measurement method used for measuring the network connection speed between a client side and a server. The method includes the following steps that a Socket connection is built on the client side, a request for connecting an 80 port of the server is sent to the server through the Socket connection, and after the request is automatically permitted by the server, the client side is in communication connection with the server through a three-way handshake mechanism based on a TCP/IP protocol; the client side sends a test data package to the server and starts timing at the moment; the client side outputs a corresponding speed measurement result according to whether a feedback data package returned by the server and timing duration are received or not, wherein the timing duration lasts to the time when the feedback data package is received. The invention further provides a network speed measurement system. The network speed measurement method and system have the advantages of being high in test success rate and not prone to failing.

The invention provides an automatic magnetic card decoding chip testing method. The method comprises the following steps: transmitting a command through a PC (personal computer) main control unit to request an apparatus to be tested in the state that the magnetic card is idle for card swiping test; re-transmitting a command through the PC main control unit to inform the CPU (central processing unit) of a testing apparatus to simulate signal jump with an F2F coding format so as to generate testing signals; processing the testing signals by a signal converter of the testing apparatus; transmitting the processed signal to the magnetic card decoding circuit of the apparatus to be tested to amplify, filter, shape and decode the signals; transmitting the signals to the CPU of the apparatus to be tested; and transmitting the test result to the PC main control unit by the CPU of the apparatus to be tested to achieve the test.

The invention discloses a residual stress measurement system through a hole-drilling method, and belongs to the technical field of material processing and experimental stress analysis. The system comprises two parts: a drilling device and stress calculation software. The drilling device is formed by a speed-adjustable electric hand drill, a tool microscope, a drill rod, a guide cylinder and a magnetic support base and the like; and the calculation software is programmed through C language, and can give residual stress in an assigned direction, or principal stress and included angle in real time. Since a drilling guide device adopts an embedded ball bearing mode, an rotary friction effect of the drill rod is totally prevented; since the support adopts permanent magnetic bases and lock nuts each having a breach, site positioning and fillet weld stress measurement are realized greatly; and since the calculation program takes features of change of hole edge plastic deformation and processing strain with the stress value into consideration, a stress calculation formula of any two vertical directions is given to enable welding residual stress measurement to become much easier and accurate.

The invention discloses a high-temperature and high-pressure hydrofracturing clamp holder and a test method thereof. The high-temperature and high-pressure hydrofracturing clamp holder comprises a test barrel, a barrel upper mounting part, a barrel lower mounting part and a barrel inner mounting part. A hydrofracturing test can be carried out for a small rock sample; a single test can be carried out by one person; the operation is convenient; the test success rate is high; and the single test cost is relatively low. The clamp holder has five seal designs in total, so that test failure caused by liquid leakage in a test process can be effectively avoided; seal parts are sealed in a related part compressing mode, and in a heating process or the test process, the seal parts can be continuously compressed; and a seal pre-tightening force application and provision part is specially designed in the barrel inner mounting part, so that expansion force after heating of the part in the test process can be resisted, research on a fracture mechanical behavior of a high-temperature and high-pressure rock mass under a thermal-mechanical coupling effect is facilitated, and theoretical basis and guidance can be provided for construction engineering of reservoir layers in high-temperature rock mass geothermal exploitation engineering.

The invention discloses a portable angle-adjustable type electronic screen test fixture. The portable angle-adjustable type electronic screen test fixture comprises a mounting seat and a rack, whereinthe rack is hinged with the mounting seat through a hinged shaft; an angle adjusting device is arranged between the mounting seat and the rack; a PG test box, a carrier and a POGO conduction device are arranged on the rack; the PG test box is electrically connected with the POGO conduction device; the carrier is of an integrated plate-shaped structure; a support boss and limiting structures are arranged on one side surface of the carrier; the limiting structures are arranged on the periphery of the support boss; each limiting structure comprises a guiding groove formed in the surface of the carrier and a limiting block connected into the guiding groove in a sliding fit manner, and the limiting block is connected with the carrier through a positioning structure. The fixture is simple in structure and convenient to carry, and can be applicable to lighting tests of electronic screens with various sizes on the premise that the carrier is not replaced integrally.

The invention discloses a motor train unit neutral section passing system dynamic simulation testing system and testing method, and belongs to the field of railroad industry automatic neutral section passing system testing technology. The system includes a control apparatus, a triggering apparatus and 4 U-shaped fixing racks. The control apparatus includes a power supply, a master controller, a No.1 wireless transmitting module, a No.2 wireless transmitting module, a No.3 wireless transmitting module and a No.4 wireless transmitting module. The triggering apparatus includes a No.1 triggering apparatus, a No.2 triggering apparatus, a No.3 triggering apparatus and a No.4 triggering apparatus. Each triggering apparatus is mounted at a corresponding onboard sensing receiver through one U-shaped fixing rack. According to the invention, the system can conduct neutral section passing test on any region of a railway line, is no longer restricted by the conditions of the railway line, and can finish the dynamic neutral section passing test. The testing method is simple and easy to operate, has a success rate as high as 100 percent, and has low cost.

The invention discloses a structural thermal external pressure test system of aircraft cabin sections. The structural thermal external pressure test system comprises a thermal load loading system, anexternal pressure loading system and an axial loading system, wherein the thermal load loading system comprises a heater for heating a test part; the external pressure loading system comprises a leather bag; the shape of the leather bag is as same as that of the outer wall of the test part; the leather bag is coated on the periphery of the test part according to the shape; liquid is added into theleather bag so as to control the pressure; the axial loading system comprises a servo oil cylinder, a connection rod and a spherical hinge; the servo oil cylinder is fixed above the test part; one end of the connection rod is connected with the servo oil cylinder; the other end of the connection rod is connected with the spherical hinge; the servo oil cylinder is started to drive the connection rod move up or down so as to drive the spherical hinge to axially apply axial tension or pressure to the direction of the test part. Through the structural thermal external pressure test system and themethod thereof, the problem of applying the thermal load, the axial tensile load and the external pressure load to the test part when carrying out thermal external pressure test and especially applying the axial tensile load when applying the thermal load and the external pressure load is solved.

The invention provides a density gradient centrifugal tube with a position-adjustable porous diaphragm. The density gradient centrifugal tube comprises a centrifugal tube body, a centrifugal tube cover is arranged at the upper end of the centrifugal tube body, a diaphragm layer is arranged in the centrifugal tube body, an internal thread is formed in the inner wall of the centrifugal tube body, an external thread is formed in the outer wall of the diaphragm layer, the internal thread of the centrifugal tube body is matched with the external thread of the diaphragm layer, and multiple small pores are formed in the diaphragm layer. The centrifugal tube is divided into the portion for containing a separating solution and the portion for being added with a sample to be detected through the diaphragm layer, premixing of the sample and the separating solution is effectively avoided, sample pollution caused during centrifuging and sampling is reduced, and the quality of centrifugal separation is greatly improved; meanwhile, a diaphragm layer rotary knob can be made to adjust the diaphragm layer up and down according to differences of the types and volumes of samples to be treated, so that optimal separation solution volume exists at the lower end of the diaphragm layer, and the application range is widened.

The invention relates to an earth and rockfill dam piping burst process field test method. According to the method, a weak layer is preset in a dam body, a porous pipe is buried in the weak layer to form a piping channel, and the dam is facilitated to form piping burst. According to the method, the phenomenon that a stable seepage channel cannot be formed in the dam and the piping burst cannot be formed is effectively avoided during test, and the phenomena that the field test fails even an unexpected sudden dam break event occurs and losses of life and property are caused because the piping channel formation time cannot be controlled are avoided. The test success rate is improved, and complete test data is ensured. According to the related method, the field piping test development time can be controlled, and the method has important values for improving the large-scale field piping test success rate and mastering the earth and rockfill dam piping burst mechanism and has important significance for pushing the development of the domestic dam break hydraulics discipline.

The invention provides a concrete impermeability test method and a test apparatus thereof. The test method comprises the following steps: fixedly connecting one end of a pre-embedded pressure leading tube with a concrete sample through pouring, connecting the other end of the pre-embedded pressure leading tube with a water tube, allowing pressure water to go through the pre-embedded pressure leading tube and to enter test concrete, and determining the water pressure of the water tube, which is the test pressure, when water infiltrates from the periphery of the concrete sample. The invention also relates to the concrete impermeability test apparatus. The method and the apparatus are adopted to carry out concrete sample impermeability test without sealing the sample, so the problem of difficult sealing between the sample and a frame test mold in the concrete sample impermeability test process is solved, the success rate of impermeability tests is improved, the operating flow is simplified, the test time is shortened, the water seepage path is visually reflected, and the practicality of an impermeability tester in engineering is improved.

The invention discloses a circumferential pressurizing device for a large-diameter Hopkinson pressure bar. The circumferential pressurizing device is characterized in that a moving platform is arranged on the upper surface of a bracket and can move along the Z direction and the Y direction. A pressurizing cylinder body is arranged on the upper surface of the moving platform and can move along the X direction. One end of each of two inner bushings is arranged in each inner hole in the two ends of an oil-separating rubber sleeve; the other ends of the two inner bushings are respectively arranged in inner holes of two outer sleeves. The two inner bushings, an oil cylinder and the oil-separated rubber sleeve are fixed tightly by one pair of outer sleeves. A hydraulic oil chamber is formed between the inner surface of the oil cylinder and the outer surface of the oil-separated rubber sleeve. The circumference of the oil cylinder is provided with an oil inlet/pressure meter interface and an exhaust hole. The circumferential pressurizing device disclosed by the invention can be widely applied in indoor static-dynamic combined loading test of the Hopkinson pressure bar made of rock and concrete materials in the fields of civil air-defense engineering, geotechnical engineering and underground engineering and the like, and has the characteristics that the pressure application is accurate and uniform, the stability is high, the positioning of a test piece is accurate, the success ratio of the test is high and the service life is long and the like.

The invention relates to a method for detecting welding cracks of an inclined Y-shaped groove. The method comprises the following steps: (1) selecting an appropriate welding material; (2) optimizing processing morphology of the groove; (3) performing preweld cleaning; (4) test piece splicing; (5) welding and restraining the weld joint; (6) preheating a testing weld before welding; (7) welding thetesting weld; (8) post-weld treatment; (9) performing weld coloring; and (10) assessment of the crack. The step (2) comprises the following sub-step: preparing samples 1 and 2, wherein the assembly structure of the sample 1 is a wedge surface which is in a longitudinal symmetry manner and mutually presents a tip top, and the assembly structure of the sample 2 is as follows: the two sides are in the shape of a wedge surface which is in a longitudinal symmetry manner and mutually presents a tip top, the middle is a slope extending up and down, the relatively upper wedge surface of the slope wholly sinks in parallel, and the sinking depth is consistent with the standard required post-weld inclined Y root gap. In addition, the method disclosed by the invention directly adopts a coloring snap or bend breaking method, and the surface crack rate, root crack rate and section crack rate can be intuitively measured.