70results about How to "Meet the test needs" patented technology

The invention relates to a method for manufacturing a digital PCR (polymerase chain reaction) chip based on a mineral-oil saturated PDMS (polydimethylsiloxane) material. The method is characterized in that the digital PCR chip based on PDMS is prepared from a PDMS monomer of a certain amount of mineral oil (liquid paraffin) and comprises an emulsion droplet generation structure and an emulsion droplet collection structure. After the emulsion droplets are made and collected on the same chip, the emulsion droplets are subjected to PCR amplification on the same chip. The phagocytosis to the oil phase in the digital PCR system by the PDMS of the chip can be avoided, the emulsion droplets can be kept stable during PCR, and the stability of the PCR can be guaranteed. In addition, compared with the existing technology of the digital PCR chip, the method provided by the invention is low in cost, is convenient to operate and has a very wide application prospect.

The invention discloses a six-degree-of-freedom distributed semi-physical simulation method of a launch vehicle. The method comprises: S1, establishing a six-degree-of-freedom distributed semi-physical model of a launch vehicle and establishing simulation models for all modules in the model; S2, according to an input and output relationship between all modules in the six-degree-of-freedom distributed semi-physical model of a launch vehicle, erecting a six-degree-of-freedom distributed semi-physical simulation system of the launch vehicle; and S3, establishing a test flow of the six-degree-of-freedom distributed semi-physical simulation system of the launch vehicle, operating the six-degree-of-freedom distributed semi-physical simulation system of the launch vehicle, simulating six-degree-of-freedom data of flight of the launch vehicle so as to complete six-degree-of-freedom distributed semi-physical simulation of the launch vehicle. In addition, the invention also discloses a simulation system. Therefore, the motion rule and characteristics of the conveyer can be reproduced vividly and comprehensively; and the correctness, parameter coordination, interference adaptability, and flight software reliability of the control system plan can be checked.

The invention discloses a closed-loop test system of a flexible direct current transmission system control and protection system. The closed-loop test system includes a real-time digital simulator, interface hardware equipment and control protection equipment of a modularized multi-electric level-based flexible direct current transmission device; the interface hardware equipment includes a power amplifier, a terminal type relay and a converter valve internal analog quantity and pulse expansion plate; the real-time digital simulator is connected with the control protection equipment of the modularized multi-electric level-based flexible direct current transmission device through the interface hardware equipment; and as a result, the closed-loop test system can be formed. The closed-loop test system is simple and flexible. With the closed-loop test system adopted, an entire modularized multi-electric level-based flexible direct current transmission actual control protection system can be tested conveniently and quickly.

The invention discloses a selenographic gravity simulation system for ground traveling tests of an exploration rover, which comprises a two-dimensional supporting rack, a two-dimensional tracking platform, a position and orientation monitoring system, a constant tension mechanism, a similar hanger and a ground monitoring system. The selenographic gravity simulation system for ground traveling tests of the exploration rover utilizes single cable hanging technology, tracking system secondary control technology, force system closed loop tertiary control technology and the like, can be successively applied to ground tests of the exploration rover, and is used for completing various test tasks including movement performances, autonomous navigation, path planning, combined tests of a lander and the exploration rover and the like, and various technical indexes meet requirements of tests. In addition, the selenographic gravity simulation system provides conditions for comprehensively and sufficiently checking traveling ability of the exploration rover.

The invention discloses a transient impact type high-speed wind tunnel low supersonic velocity flow field testing method and spray pipe devices thereof, which belong to the technical field of wind tunnel tests. In the prior art, an ideal low supersonic velocity flow field cannot be realized, and test requirements cannot be met. The transient impact type high-speed wind tunnel low supersonic velocity flow field testing method utilizes the newly designed M1.3, M1.35 and M1.4 spray pipe devices combined with an aperture wall test section to establish a low supersonic velocity flow field in a transient impact wind tunnel, and adopts a Mach number control method to obtain ideal flow field control quality; through the analysis of the axial Mach number distribution of the test section at different expansion angles, the method determines that the smaller the expansion angle of the test section at low supersonic speed, the better the uniformity of the flow field, and the expansion angle of 0 degree is selected as a tunnel body condition; the nozzle devices are combined with the aperture wall test section, and a test section expansion angle and flow field control mode is used to obtain a qualified flow field that meets the requirements of the national military standard; the ideal low supersonic velocity flow field and the test requirements are achieved; and a hardware basis is provided for realizing the ideal low supersonic velocity flow field and meeting test requirements by adopting spray pipe aerodynamic profiles of the M1.3, M1.35 and M1.4.

The invention discloses injecting equipment and an environment simulation system based on the injecting equipment, wherein the injecting equipment and the environment simulation system are used for the direct connection test of a novel stamping engine. According to the technical scheme of the invention, the equipment and the system solve the problems in the prior art that an existing test environment simulation system cannot simulate the air inflow condition and meet the requirement on the injecting capacity, and is low in injecting efficiency and large in investment scale. The injecting equipment comprises a plurality of steam injecting units arranged on the gas collecting pipe of the simulation system. Each steam injecting unit comprises a high-flow steam generator and a set of two-stage steam injection pumps, wherein the set of two-stage steam injection pumps is formed through the serial connection of a first steam injection pump and a second steam injection pump. The output end of the high-flow steam generator is respectively connected with the first steam injection pump and the second steam injection pump. The first steam injection pump is connected with the gas collecting pipe through a steam injection pipe. A first steam injection and isolation valve is arranged between the first steam injection pump and the gas collecting pipe. A second steam injection and isolation valve is arranged between the first steam injection pump and the second steam injection pump.

The invention discloses a composite high precision radio frequency simulation system based on microwave and millimeter wave. The composite high precision radio frequency simulation system based on microwave and millimeter wave is characterized in that seeker equipment is the user of the radio frequency simulation system; a target signal simulator is used for generation and modulation of a target echo signal; an array feed subsystem simulates an electric wave arrival angle, relative to the tested seeker, of a radiation signal; a computer control subsystem implements command control of the target signal simulator, the array feed subsystem, a three-axle table subsystem and the seeker equipment through fibers or network cables; the three-axle table subsystem simulates the missile motion attitude; and a calibration device subsystem implements calibration of the array feed subsystem. The composite high precision radio frequency simulation system based on microwave and millimeter wave is usedfor a microwave and millimeter wave handover test for the seeker equipment. The composite high precision radio frequency simulation system based on microwave and millimeter wave analyzes the angularposition error source, can eliminate or correct the error from the source, and can improve the target angular position accuracy of the composite radio frequency simulation system based on microwave and millimeter wave.

The invention provides a high-temperature corrosion and erosion testing device of a bent pipe column of an oil well pipe. The high-temperature corrosion and erosion testing device comprises an erosion and corrosion channel, an electrochemical work station and a storage tank, wherein the storage tank comprises a storage tank secondary cavity and a storage tank main cavity, which are arranged in sequence from bottom to top; the upper end of the storage tank secondary cavity is communicated with the upper part of the storage tank main cavity through a connection channel, and a secondary temperature controller is arranged at the bottom of the lower end of the storage tank secondary cavity; the erosion and corrosion channel comprises an erosion and corrosion box body, and the two ends of the erosion and corrosion box body are communicated with the storage tank main cavity through a main pipeline and a main loop respectively; the erosion and corrosion box body is provided with a plurality of sample mounting holes; the main pipeline is communicated with the storage tank main cavity through a gas pipeline and a liquid pipeline, which are arranged in parallel; a gas flow controller and a gas control valve are arranged on the gas pipeline connected onto the upper part of the storage tank main cavity respectively; a liquid flow controller and a liquid control valve are arranged on the liquid pipeline connected onto the lower part of the storage tank main cavity respectively; the upper end of the gas flow controller is connected with the upper end of the liquid flow controller through a communication pipeline and the communication pipeline is provided with a regulating and controlling valve; and the electrochemical work station is connected with a sample.

The invention relates to a temperature-controllable salt leaching-adding soil test device and a method for testing a soil sample by using the same. The invention mainly aims to solve the technical problem in a current quantitative loess research method that great error exists between test data and an engineering entity. The technical scheme adopted by the invention is characterized in that the temperature-controllable salt leaching-adding soil test device consists of a soil sample barrel, a temperature control system, a salt leaching-adding system, a pressuring device and a data acquisition system. The method for testing the soil sample by using the device comprises the following steps: 1) the moisture content and the soluble salt content of the soil sample are tested; 2) the soil sample is charged into the soil sample barrel; 3) weight is applied to the pressuring plate; 4) the soil sample is heated; 5) a salt solution or water is added to the soil sample; 6), 7) and 8) the temperature is raised, lowered and then is raised, and the deformation situation of the soil sample is recorded; 9) distilled water is added to the soil sample with a water (salt) supplying container, and the deformation situation of the soil sample is recorded; 10) discharged water is collected with a collection container; the conductivity of the discharged water is tested; and the deformation situation of the soil sample is recorded.

The invention discloses a design method of a pressure measuring rake special for a deformed flow channel of a wing body fusion airplane ventilation model. According to the invention, the design methodcomprises the steps: acquiring the flow characteristics of the deformed inner flow channel under the interaction of the inner flow of the inner flow channel and the outer flow of the model through anumerical simulation method; performing sub-region division on a measurement cross section according to a numerical simulation result; taking the areas of the sub-regions as weights of calculation ofinternal flow parameters in the sub-regions, determining the number and position distribution of total pressure measuring points and static pressure measuring points on a measuring cross section, anddesigning a rake body to reduce the blocking interference effect. Therefore, the special pressure measuring rake suitable for the deformed internal flow channel of the wing body fusion layout airplaneventilation test model is designed through the process.

The invention provides a sliding rockburst shear test system under dynamic disturbance. The sliding rockburst shear test system is characterized by comprising the following parts: a shear box member;a vertical loading device which applies a vertical load to the sample and includes an electromagnetic exciter applying an excitation load and a vertical dynamic pressure sensor disposed at the end ofthe electromagnetic exciter; a horizontal loading device including a horizontal loader and a horizontal pressure sensor disposed at the end of the horizontal loader; a data acquisition unit includinga dynamic displacement sensor set on the electromagnetic exciter, a horizontal displacement sensor disposed on the horizontal loader, distributed fiber grating sensors uniformly disposed on a portionto be tested of the sample in a net structure for performing real-time dynamic strain measurement on the portion to be tested, and a CT real-time scanning system that faces the shear box member for scanning the sample in the box and obtaining crack information of the sample; and a control portion.

The invention discloses a flexible DC transmission project voltage source converter valve short circuit current test device. Short circuit current branches are formed by an AC short circuit branch and a DC short circuit branch and are parallelly connected onto two ends of two sample valves respectively. Before the short circuit current test begins, a switch is used for selecting a sample valve for executing the short circuit current test, the sample valve and an assistant sample valve are triggered to be in a stable continuous operation state. Through a control strategy, the sample valve generates a short circuit current DC component through the DC short circuit branch. At a proper control point, a short circuit current AC component is introduced through the AC short circuit branch. The short circuit current DC component and the AC component are overlapped and then flow through the sample valve, and the required short circuit test current flows through the sample. The short circuit current equivalent to an actual fault working condition is adopted to check the short circuit current resisting ability of the sample valve, the DC short circuit current component and the AC short circuit current component are flexible and adjustable, the test capacity is large, and the test device is simple in structure and easy to build.

The invention discloses a contact state and humidity adjustable cable water-blocking buffer layer structure simulation test system and method. The system comprises a bottomless test box body with a ventilation opening in the top surface, and the interior of the bottomless test box body is provided with partitions and is divided into a monitoring area, a test area and a control area; a camera is placed in the monitoring area, an ablation platform is placed in the middle of the test area, humidifiers are placed at four corners in the test area respectively, electric fans are placed among the humidifiers, and a power bank is placed close to the partition; a PLC is placed in the control area, and a data line of the PLC penetrates through the side wall of the box body and is connected to an external computer; and data lines of the humidifiers and the electric fans penetrate through the partitions and are connected to the PLC. According to the system and the method, the structural characteristics of a corrugated aluminum sheath and a water-blocking buffer layer in the high-voltage cable are effectively restored, and the real working state of the water-blocking buffer layer under the actual cable operation condition is better simulated by adjusting the external voltage and current, the electrode position, the pressure and the environment humidity, so that the fundamental reason and the damage mechanism of ablation of the water-blocking buffer layer are favorably explored and analyzed.

The invention discloses a pressure control system used for a gas gun bounce table. The pressure control system comprises one cylinder group (1), wherein the cylinder group (2) is communicated with a first manual switching valve (31); the first manual switching valve (31) is respectively communicated with a first air inflation branch circuit (100) and a second air inflation branch circuit (200); the first air inflation branch circuit (100) is communicated with an inner air chamber (7) in the gas gun bounce table and used for carrying out air inflation on the inner air chamber (7); and the second air inflation branch circuit (200) is communicated with the an outer air chamber (8) in the gas gun bounce table and used for carrying out the air inflation on the outer air chamber (8). The pressure control system disclosed by the invention can safely and reliably control the gas gun bounce table to launch pills outward, and a high-speed impact resonant plate produces a high-order shock response spectrum, so that an explosion separation shock environment produced by a pyrotechnic device on a spacecraft product during action is simulated.

The invention discloses an environment-friendly insulation gas and metal compatibility test simulator and a test method. The environment-friendly insulation gas and metal compatibility test simulatorcomprises a stainless steel tank (1) and is characterized in that an air chamber (2) is fixed into the stainless steel tank (1), the top of the air chamber (2) is covered with a sealing cover (7), thecenter of the bottom of the sealing cover (7) is connected with a metal sleeve (8), and a heating bar (16) is placed in the metal sleeve (8). The problems that in the prior art, related devices and test methods aiming at the compatibility of insulation gas and metal materials in electrical equipment do not exist, and the compatibility of the insulation gas and the metal materials cannot be effectively tested are solved.

The invention relates to a torsion tester for a cable branch box. The torsion tester comprises a base, a main body frame, crossbeams, sliding blocks, pulleys, heavy loads, steel cables and jacks, wherein a fixture used for fixing a tested specimen is mounted on the base, the main body frame is mounted above the base, and the crossbeams are levelly and laterally mounted on both the front side and the back side of the corresponding main body frame above the base; the crossbeams adopt a longitudinal regulating structure which can guide upward to downward, both the middle parts of the both ends of the both sides of the crossbeams are connected with a longitudinal thread screw rod which is mounted at the upper part of the main body frame to be driven and regulated, and the crossbeams move up to down along guide rails which are arranged in the main body frame; the crossbeams comprise an upper crossbeam and a lower crossbeam, the sliding blocks are horizontally mounted on the both crossbeams in a sliding manner respectively, and a graduated scale used for measuring is made on each sliding block. All the crossbeams and the pulleys disclosed by the invention adopt adjustable design, the decomposition of force is avoided, the application of the force is more accurate, the error range is within 0.5%, and data of casing deflection can be accurately measured through moving the scales.

The invention provides a method for identifying a mechanical damage area of a corn ear. The method comprises the following steps of: S1, dividing a corn ear image into image patches, obtaining a cornear image patch data set; S2, according to the normalized feature of each image patch in the image patch data set, determining a candidate region patch by using a support vector machine; and S3, usinga convolutional neural network model to determine the mechanical damage region in the candidate region patches. According to the method for identifying the mechanical damage area of the corn ear, selecting the candidate region in the corn ear image by using the support vector machine, further identifying by the convolutional neural network model, and can quickly and accurately identify the mechanical damage region of the corn ear; therefor, the speed and accuracy of the identification of the mechanical damage area of the corn ear can be improved, and the needs of corn testing can be meet.

The invention provides a back-to-back testing circuit based on a DC/DC converter. The back-to-back testing circuit comprises DC buses, a power supply module and a DC/DC converter module. The DC buses are used for connecting the power supply module and the DC/DC converter module in series. According to the back-to-back testing circuit, a back-to-back connection manner is utilized on a tested member; Supplying of one end DC voltage to the tested member is required. Furthermore voltage grade can be selected according to a relatively low rated DC voltage of the tested member. More importantly, two converters can feed most absorbed electric energy back to a power grid, and the power supply part of the testing circuit only supplies a relatively low output current, thereby greatly reducing capacity and manufacture difficulty of testing equipment, and greatly reducing testing equipment cost and operation cost in testing.

The invention relates to a multidirectional full-automatic three-dimensional impact testing machine for a for low-voltage metering meter box; the multidirectional full-automatic three-dimensional impact testing machine comprises a frame seat and a rotating body; the rotating body is slidingly connected on the frame seat; the frame seat is provided with an upper and lower lifting assembly; the upper and lower lifting assembly is provided with a horizontal sliding assembly; the horizontal sliding assembly is provided with a hose or a steel pipe, the bottom end of the hose or the steel pipe is provided with a hammer head, the horizontal sliding assembly is provided with a suction plate, and the hammer head is provided with an electromagnet. The multidirectional full-automatic three-dimensional impact testing machine has the advantages that the suction plate is triggered to suck the electromagnet through energizing the electromagnet, the hammer head is controlled to lift up, the electromagnet is divorced from the suction plate through power failure of the electromagnet, the hammer head triggered to lift up is thrown out to impact the low-voltage metering meter box, the hammer head after impacting can improve the energization of the electromagnet to rapidly recover onto the suction plate, the low-voltage metering meter box can bear same impact force during each time of impact, the accuracy of the test number is ensured, and the efficiency of the tests is improved.

The present invention relates to a multi-functional vibration device comprising rotating frame assemblies disposed vertically at the left and right parts, a mounting plate assembly disposed horizontally between the rotating frame assemblies, and a test bed interface assembly located at the bottoms of the rotating frame assemblies. The two ends of the mounting plate assembly connected to the rotating frame assemblies are respectively provided with a rotating shaft at the central part and limiting bosses at the end parts. The multi-functional vibration device provided by the invention can realize the vibration requirements of the test product in three directions, and can also realize the vibration test of multiple products at the same time, satisfy the multiple requirements of the reliability enhancement test on the vibration direction of the product, and realize a multi-purpose device. The test time and the test cost are saved.

The invention discloses a device and method achieving triaxial shear tests of samples of different sizes. The bottom of a counter-force frame is provided with a power source. The top of the power source is provided with a movable base. The upper portion of the movable base is provided with a lower cushion block. The lower cushion block is provided with a lower water permeable mat. A sample is installed on the top of a lower water permeable plate. The outer surface of the sample is provided with a latex film. The top of the sample is provided with an upper water permeable plate. The top of the upper water permeable plate is provided with an upper cushion block. The top of the upper cushion block is provided with a self-balance ball head device in a positioning mode through an upper positioning pin. An axial force transfer rod penetrates through an upper cover of a confining pressure chamber to make contact with the upper top face of the self-balancing ball head device in a matched mode. An axial sensor is arranged between the axial force transfer rod and the counter-force frame. The test device can achieve triaxial shear tests of samples of different sizes, and the defects that a traditional triaxial test instrument can only test samples of one size and a sealing ring is likely to be damaged due to horizontal sealing are overcome.

The invention discloses a measuring and testing device and a measuring and testing method for a soil mass displacement field around a loaded structure. The measuring and testing device and the measuring and testing method solve the problem of discontinuous displacement application in the prior art, and have the beneficial effects that the measurement precision is high and the model can realize repeated use. The measuring and testing device is characterized in that: the measuring and testing device for the soil mass displacement field around the loaded structure comprises a bracket, a plane strain model tank, a loading mechanism and a recording mechanism, wherein the plane strain model tank supported by means of the bracket, at least one side surface of the plane strain model tank is transparent, the plane strain model tank is filled with a filler, structures are embedded inside the filler, the structures are connected with one end of a connecting rod; the loading mechanism is supportedby means of the bracket, the loading mechanism comprises a lifting component capable of realizing up and down lifting motion, a stress sensor is arranged between the lifting component and the other end of the connecting rod, and a displacement sensor is supported by means of the fixed bracket; and the recording mechanism is arranged on at least one side of the plane strain model tank for recording the displacement changes of the filler in the plane strain model tank.

The invention relates to a valve test device in the technical field of valves. The valve test device comprises an engine, an exhaust main pipe, an exhaust branch pipe and a test valve, wherein the exhaust main pipe is in communication with an exhaust port of the engine, an adjusting valve is installed on the exhaust main pipe, the exhaust branch pipe is in communication with the exhaust main pipe,the test valve is installed on the exhaust branch pipe, and a branch pipe switch valve is installed at the tail end of the exhaust branch pipe. The invention further provides a valve test method. Thetest device can simulate the actual use state of the engine and an adjustable pressurizing system valve, the large-flow high-temperature gas with pressure fluctuation is circulated in the pipeline, the front-back temperature difference of the valve changes several hundred degrees Celsius within a few minutes when the valve is closed, the vibration condition exists in the installation position ofthe valve, and the function and the reliability of the valve in the actual use state can be verified.

The invention discloses a bird-like flapping wing aircraft testing device and a testing method thereof, and belongs to the technical field of unmanned aerial vehicle testing equipment. The aircraft testing device comprises a test frame body and a test frame body stress comprehensive detection device, wherein the test frame body comprises a sensor detection bracket, a force bearing frame and an aircraft connecting seat; the force bearing frame comprises an aircraft axial positioning bracket and an oblique beam; the test frame body stress comprehensive detection device comprises three force measurement supports, each force measurement support comprises a base and a composite force measurement sensor, and each composite force measurement sensor comprises a horizontal tension and pressure sensor and a vertical tension and pressure sensor; and the three force measurement supports are respectively hinged with two base angle ends and a vertex angle end of the sensor detection bracket. The testing method comprises the steps of a, mounting and positioning the aircraft and the testing device; b, installing the testing device in place; c, connecting a circuit of the testing device; d, testingthe bird-like flapping wing aircraft to be tested; e, generating a test result. The device has the characteristics of reasonable structure, convenient operation, accurate test and the like.

The invention relates to a permeable asphalt pavement permeability attenuation model test system and method. The system comprises a sample tank and a loading device arranged above the sample tank, the loading device comprises stand columns arranged on the two sides of the sample tank, the top ends of the stand columns are fixed to a top plate, lifting mechanisms are arranged at the two ends of the top plate, and the lifting mechanisms are connected with lifting tables; a guide rail is connected between the lifting tables, wheels are connected to the guide rail in a sliding mode, the wheels are connected with a driving mechanism used for driving the wheels to move in the axis direction of the guide rail. The system also comprisesa first camera shooting part arranged on the top plate and a second camera shooting part arranged on one side of the sample tank, the other side of the sample tank is provided with a first laser scanning part, a spray pipe is arranged below the top plate, and thespray pipe is connected with a water supply device. The system disclosed by the invention can be used for researching the permeability attenuation condition of the permeable asphalt pavement under the combined action of traffic load, silt and rainwater.

A wheel and axle bending fatigue test device belongs to the technical field of test equipment. The object of the invention is to design a railway train wheel and axle bending fatigue test device by analyzing the actual operating conditions of the railway train and comprehensively considering various factors. According to the invention, four pillars arranged in a rectangular arrangement are fixed on one side of a bearing platform, the upper ends of the four pillars are fixedly installed with a top support plate, and a middle support plate is installed in the middle; a vertical loading mechanismis installed on the top support plate through an upper fixing member, and installed on the middle support plate through a lower fixing member; a lateral movement mechanism is installed under the middle support plate through the track, and the rotation mechanism is inserted into the inner bearing of the rotation bearing through the front end shaft. The invention realizes two kinds of fatigue teststhrough a fatigue test device, ensures that the test device can perform tests according to actual operating conditions, reduces the processing cost of the experimental device, and has a positive effect on improving the quality of China's railway trains.

The invention discloses a test device for researching the propagation characteristic of elastic p-wave in a joint rock mass. The test device comprises a shooting system, a loading system, and a measuring system. A pipeline of a shooting cavity is made from a high-strength insulating material. Bullets are composed of an armature and a metallic bullet body. A power system uses magnetic waves generated by alternating current to drive the bullets. The initial speed of the bullets can be changed by changing a discharge voltage, so that the propagation characteristic of the elastic p-wave with different initial wave speeds in the joint rock mass can be obtained, and the propagation characteristic of the elastic p-wave with different initial waveforms can be obtained by adjusting the shape of thebullets. The measuring system uses a strain gage to measure the local displacement of the rock, so as to obtain a wave speed change. The measurement system also adopts a digital image processing technique. The two measured data are compared to ensure the accuracy of the test.

The invention discloses a dynamic tensile test fixture for a test specimen. The dynamic tensile test fixture for the test specimen comprises an upper part and a lower part; the upper part and the lower part are separately arranged at both ends of the test specimen and are arranged symmetrically up and down, and the upper part and the lower part have the same structure; the upper part comprises a main fixture and an assistant fixture; the central part of the lower end of the main fixture is provided with a through groove; screw holes are arranged on both sides of the through groove; fixed filler sheets are arranged on both sides of the main fixture; the fixed filler sheet is connected to the main fixture through bolts and nuts; the main fixture and the assistant fixture are fixed through the fixed filler sheets; the middle part of the upper end of the assistant fixture is provided with a jackscrew through hole, and the middle part of the lower end is provided with a sample groove; the test specimen is arranged in the sample groove; and the assistant fixture and the test specimen are fixed through a jackscrew adapted to the jackscrew through hole. During the test, the test specimen,the assistant fixture and the main fixture are fixed through the jackscrew and the fixed filler sheets, so as to ensure that the tensile force applied by the testing machine coincides with the axis ofthe test specimen, thereby preventing eccentric loading from adversely affecting the test.

The invention discloses a flow-detecting electronic-injection fuel consumption meter comprising a measurement control system, an oil level balancer, an oil stabilizer, and an oil storage box. The oil stabilizer distributed right below the oil level balancer provides stable pressurized oil to an electronic injection engine injector and the oil storage box provides oil for the oil level balancer continuously. The oil stabilizer is connected with the electronic injection engine injector through a fifth oil supply pipe, and the oil level balancer is connected with the oil stabilizer through a seventh oil supply pipe. The oil storage box is connected with the oil level balancer through an oil supply pipeline. An oil supply detection unit for detecting oil supply for the oil storage box under the oil consumption measurement condition is mounted on the oil supply pipeline. The oil supply detection unit is a flow meter sensor which is connected with the measurement control system. The flow-detecting electronic-injection fuel consumption meter is simple in structure, low in cost, convenient to assemble and disassemble, reasonable in design, high in automation level and effective in using, measured data is accurate, and various defects of the existing oil consumption measurement equipment are solved effectively.

The invention belongs to the field of aero-engine fuel accessory verification testing technology, and particularly to a variable-equivalent nozzle simulating tool. The variable-equivalent nozzle simulating tool comprises a housing (2), a valve core (3), a valve sleeve (4), a spring (5), a spring guiding seat (7), a sealing end cover (8), a floating spring seat cushion (9), an adjustable cushion plate (10) and a throttle nozzle (11). The tool can automatically adjust a nozzle equivalent according to a front-and-back pressure difference and a nozzle characteristic for satisfying a testing requirement. The variable-equivalent nozzle simulating tool has advantages of satisfying a requirement for different nozzle characteristics through replacing the valve sleeve, reducing testing cost and improving response speed and control stability of an electric control nozzle.