27results about How to "Reduce trial risk" patented technology

The utility model relates to the technical field of tunnel construction and underground space engineering construction, in particular to a TBM (Tunnel Boring Machine) hob performance test detection device based on linear rock breaking, which comprises a base, a frame is arranged on the base, and a rock breaking mechanism, a rock box mechanism, a rock breaking hob component and a rock box body are arranged in the frame. A load sensor is fixed between the tool support and the hydraulic oil cylinder, and a three-way force sensor is fixed between the tool support and the tool apron; a confining pressure sensor is arranged on the rock box body, a weighing device is arranged at the bottom end in the frame, and a photoelectric temperature integrated sensor is arranged on the weighing device. By monitoring various performance parameters such as hob load, temperature and abrasion in real time, analyzing hob diameter and weight changes, analyzing rock breaking effects of different hobs and researching a hob rock breaking mechanism, quantitative evaluation of performance differences of different hobs is achieved, reference is provided for manufacturers to manufacture and optimize hob performance, and the hob rock breaking performance evaluation device is suitable for large-scale popularization and application. And key guidance is provided for selection of tunnel project hobs and selection of construction parameters.

The present invention discloses a multi-objective optimization method for vehicle safety based on NSGA‑II, comprising the following steps: (1) determining a vehicle simulation simulator and setting a vehicle operation scenario; (2) determining the range and default value of vehicle physical parameters; (3) establishing a multi-objective optimization model, including: establishing a vehicle physical parameter selection model; performing averaging processing according to the value ranges of different parameters, and establishing a vehicle physical parameter configuration difference model; establishing a vehicle obstacle avoidance effect model according to the obstacle avoidance related data returned by configuring the vehicle physical parameters in the automobile simulation simulator; (4) solving the multi-objective optimization model using a multi-objective search algorithm. The present invention uses an automobile simulation simulator to solve the problem that vehicle physical parameters are difficult to combine and configure in real scenarios; by setting a multi-objective optimization model, the search space is reduced, and a Pareto optimal solution set is obtained in a relatively short time, which is convenient for analyzing parameters that have a greater impact on vehicle safety performance.

A chip crystal grain high-temperature test clamp comprises a crystal grain placing area which is provided with a common plate, a plurality of crystal grains are placed in the upper end face of the common plate, and a plurality of probes in contact with crystal grain anodes are further arranged above the common plate; the circuit arrangement area is provided with a burn-in board, a fuse is arranged on the burn-in board, and the burn-in board is connected with the probe through a wire; wherein each crystal grain is provided with one fuse and one probe; and each probe in contact with the crystal grains is connected with the fuse through a lead. The test fixture is simple in structure and easy to operate, unqualified crystal grains can be accurately and quickly found, and normal test results of other crystal grains are not affected; all the crystal grains are detected before packaging, so that the later packaging quality can be ensured; the test period can be shortened, and the test risk can be reduced. The utility model further provides production equipment provided with the test fixture.

The invention relates to a method for preparing a sample wafer for X fluorescence analysis of bentonite by using a melting method, which comprises the following steps: 1) adding a flux and a bentonite sample into a crucible, dropwise adding a boric acid-glycerol solution, and stirring until the mixture is muddy; (2) adding a liquid oxidant into the crucible, uniformly stirring, wiping the head of the glass rod with quantitative filter paper, and putting the wiped filter paper into the crucible; and 3) firing the crucible on a high-frequency sample melting machine until the solid in the crucible is molten into a liquid state, adding a release agent, slightly cooling, and demolding to obtain the sample for X fluorescence analysis. The method has the advantages that the operation is simple, the flaking rate is high, and prerequisite conditions are provided for quickly, accurately and reliably measuring the primary and secondary components of the bentonite. According to the method, the sample does not need to be fired at high temperature by a muffle furnace in advance, the platinum crucible does not need to be pretreated, the detection period is remarkably shortened, and the power consumption cost is reduced.

The invention belongs to the technical field of flight test, and particularly relates to a helicopter ground resonance test system and test method. Standards or regulations only provide requirements for ground resonance, but do not provide a specific implementation mode of a ground resonance verification test. Through corresponding calibration operation, the corresponding relation between the lift force of the rotor wings and the collective pitch position is obtained, the pull force of the rotor wings which is difficult to observe visually is converted into the collective pitch position which is easy to observe visually, and a driver controls the lift force by controlling the collective pitch; ground testers can observe overload acceleration signals of all measurement positions and linear displacement signals of a damper (or a buffer strut) in real time through the portable tablet computer, the helicopter state under excitation can be obtained more visually, and ground resonance phenomenon trends can be found in time and handled emergently when possibly existing. The driver and an onboard driver serve as emergency condition judgment backups for each other, the test risk is reduced, and the test safety coefficient is improved; through the external fuel oil cutting device, fuel oil and power of the helicopter can be cut off in time when the helicopter possibly has a ground resonance phenomenon trend and needs emergency treatment, so that the safety of testers such as a driver and the like is guaranteed. The working intensity of a driver is reduced, and the operability of the test is enhanced.

The invention discloses a mechanical property testing environment box and a testing method, and the mechanical property testing environment box comprises an upper box body cover, a box body, a lower bottom plate, a control mechanism and a stretching mechanism; the upper box body cover, the box body and the lower bottom plate are detachably and hermetically connected; the stretching mechanism comprises an upper clamp, a lower clamp, a support frame, a threaded sleeve, a screw rod, a rotor mechanism and a stator mechanism; the upper clamp is fixedly connected with the upper box body cover; the lower clamp is fixedly connected with the upper end of the threaded sleeve; the upper part of the screw rod is a connecting part connected with the threaded sleeve; the lower end of the screw rod is pivoted with the lower bottom plate; a rotor mechanism is arranged at the lower part of the screw rod; the rotor mechanism comprises a coil winding rod fixedly connected with the screw rod; a stator mechanism comprising a strong magnet is arranged at a position, corresponding to the rotor mechanism, of the lower part of the inner wall of the box body; a coil of the coil winding rod is in circuit connection with the control mechanism through a lead hole of the lower bottom plate; according to the invention, the problem of gas leakage in the environment box caused by dynamic seal failure is avoided.

The present invention discloses a power turbine rotor maximum unbalance test device and test method, comprising an assembled engine shaft system, a torque measuring unit, a turbine simulation disk and a tester, the mass characteristics and dynamic characteristics of the turbine simulation disk are consistent with the two-stage power turbine disk assembly of the engine, so as to replace the two-stage power turbine disk and be installed on the engine shaft system; a counterweight installation structure is evenly distributed along the circumference of the turbine simulation disk, which is used to connect a first counterweight at one or more preset circumferential positions according to test requirements to thereby change the unbalance amount of the wheel disc position.

The invention discloses a mechanical test method, a mechanical test environment box and an operation method thereof, and the mechanical test environment box comprises an upper box body cover, a box body, a lower bottom plate, a control mechanism and a stretching mechanism; the upper box body cover, the box body and the lower bottom plate are detachably and hermetically connected; the stretching mechanism comprises an upper clamp, a lower clamp, a support frame, a threaded sleeve, a screw rod, a rotor mechanism and a stator mechanism; an upper clamp for fixing the upper end of the sample is fixedly connected with the upper box body cover; a lower clamp for fixing the lower end of the sample is pivoted with the upper end of the screw rod; a threaded sleeve is arranged in the middle of the screw; a rotor mechanism comprising a coil winding rod fixedly connected with the screw rod is arranged at the lower part of the screw rod; a stator mechanism comprising a strong magnet is arranged at the lower part of the inner wall of the box body; a coil of the coil winding rod is in circuit connection with the control mechanism through a lead hole formed in the lower bottom plate; the supporting frame is used for being connected with a lower clamp. Or fixedly connected with the threaded sleeve. According to the invention, the problem of gas leakage in the environment box caused by dynamic seal failure is avoided.

This invention relates to the field of aero-engine technology, and discloses an inlet swirl adjustment device and its design method for an afterburner test component. A flow divider ring is used to segment the test flow channel into an inner flow channel and an outer bypass flow channel for simulating the airflow in the inner flow channel. The remaining linkage control structures are installed in the outer bypass casing or outer bypass flow channel to reduce interference with the inner flow channel. The linkage adjustment assembly performs overall synchronous adjustment of all adjustable guide vanes, ultimately achieving adjustment of the inner airflow angle, thereby simulating the inner airflow of the afterburner and reducing testing costs and overall engine verification risks. The inlet airflow swirl adjustment device of this invention comprehensively considers the relevant requirements of total pressure recovery coefficient and airflow uniformity index, ensuring high-precision and high-stability simulation of the inner airflow of the afterburner. Furthermore, its simple structure allows for easy assembly and replacement, providing flexible support for afterburner performance testing under different operating conditions.

This utility model discloses a pedal impact testing device, comprising: a frame; a quick-change fixture disposed at one end of the frame; a pendulum impact column body fixture disposed in the middle of the frame; a magnetic platform placement welding frame disposed at the other end of the frame, wherein an electromagnetic suction platform is disposed on the magnetic platform placement welding frame and connected to the pendulum impact column body fixture; and a rotating device disposed between the magnetic platform placement welding frame and the pendulum impact column body fixture and connected to the pendulum impact column body fixture. Through the application of this utility model, a pedal impact testing device is proposed. Compared with manual operation, it can not only shorten the single test time and speed up the overall testing process, but also reduce the test errors caused by manual operation and the risk of contact between the person and the pendulum, which is beneficial to improving the accuracy and safety of the test.

The application relates to the technical field of transformers, and provides a transformer bushing withstand voltage test system, one end of the bushing is provided with an exhaust plug and a wiring terminal, the transformer bushing withstand voltage test system comprises an oil tank and a pressurizing device, the oil tank is provided with an oil inlet, the oil inlet is used for injecting transformer oil into the oil tank, the bushing is used for being connected to the oil tank, and the other end of the bushing away from the exhaust plug is inserted into the oil tank and is in communication with the oil tank; the pressurizing device is used for being electrically connected to the wiring terminal, so as to apply a test voltage to the bushing. The application can realize the off-line withstand voltage test of the transformer bushing, effectively reduces the test risk, and improves the test efficiency.

This invention provides a combustion chamber testing apparatus and method. The combustion chamber testing apparatus includes a combustion chamber test piece, a simulated bleed air test piece, and an outlet guide test piece. The combustion chamber test piece includes an outer casing, a diffuser, a flame tube, and an inner casing. The diffuser is located at the front of the flame tube, and air enters the first airflow channel, the second airflow channel, and the third airflow channel through the diffuser. In the first stage of the test, the simulated bleed air test piece is placed at the outlet of the combustion chamber test piece, and the air flowing out of the first and third airflow channels passes through the simulated bleed air test piece and exits the combustion chamber test piece. In the second stage of the test, the outlet guide test piece is placed at the outlet of the combustion chamber test piece, and the air flowing out of the first, second, and third airflow channels passes through the outlet guide test piece to obtain the pressure value inside the flame tube, thereby obtaining the thermoacoustic-structural coupled oscillation boundary of the combustion chamber.

The invention discloses a test center equipment digital platform which comprises an equipment ledger management module, an equipment statistical analysis module, an equipment data acquisition module, a test task management module, a test task comparison module, a test report management module, a test product management module, a test condition management module and a test statistical module. The equipment ledger management module is respectively and forwardly connected with the equipment statistical analysis module, the test task management module and the equipment data acquisition module, and the test condition management module and the test product management module are respectively and forwardly connected with the test task management module. The system has the advantages that equipment is controlled, test tasks are managed in a unified mode, the test process is monitored in real time, test result data are integrated, test data and equipment data are stored and analyzed, overall digital construction of a test center is improved, and the system has wide application prospects and is beneficial to popularization and application.

The utility model provides an automobile body structure and an automobile. The automobile body structure comprises a stand column structure, an automobile roof frame structure and a reinforcing piece. The upper end of the stand column structure is connected with the roof frame structure, and an internal force transmission cavity communicating with the top end of the stand column structure and the roof frame structure is formed. The reinforcer is arranged in the internal force transmission cavity, the upper end of the reinforcer is connected with the car roof frame structure, and the lower end of the reinforcer is connected with the stand column structure. According to the automobile door hinge, the upper end of the stand column structure is connected with the automobile roof frame structure, the internal force transmission cavity communicated with the top end of the stand column structure and the automobile roof frame structure is formed, then the reinforcing piece is arranged in the internal force transmission cavity, the reinforcing piece can resist stress of the upper end of the stand column structure, and the deformation amount of the automobile door hinge is reduced; use of sheet metal parts at the upper end of the stand column structure is reduced, the rigidity and strength of a vehicle body structure are guaranteed, the collision performance of the upper end of the stand column structure reaches the standard, the weldability and welding quality of surrounding related sheet metal are improved, and meanwhile the effect of reducing weight and cost can be achieved.

The invention provides a goods shelf fire test system and a data acquisition method, and belongs to the technical field of fire automatic alarm system early warning and monitoring, and the system comprises a fixed goods shelf fire test device which is used for constructing a fixed goods shelf to be subjected to a fire test; the optical smoke density tester is used for acquiring an optical smoke density value of smoke in a fire test process; the video image acquisition module is used for acquiring video images in the fire test process of the fixed goods shelf in the fire test process; the temperature field acquisition module is used for acquiring the temperature of the ignition point of the fire scene and the space temperature in the fire test process; the air-breathing smoke-sensing fire test module, the pipeline-type shelf fire detection module and the point-type smoke-sensing fire detection module are respectively used for collecting smoke concentrations in different time periods. The system can more accurately simulate the whole process of the goods shelf fire, shortens the test period, and reduces the test cost and the risk coefficient.

The invention relates to a reactor protection system response time test method and system, and the method comprises the steps: obtaining equipment response time data and multiple groups of transmission path data in a reactor protection system; and selecting one group of transmission path data from the multiple groups of transmission path data to calculate the optimal response time of each transmission path together with the equipment response time data, and taking the optimal response time as a standard value for subsequent judgment. According to the method, the test efficiency and accuracy are remarkably improved, the test cost and the human error risk are reduced, meanwhile, potential problems in the system response time are effectively recognized and optimized, and the safety and reliability of the reactor protection system in actual operation are ensured.

The invention relates to the technical field of ship test measurement, in particular to an automatic water surface ship inclination and still water rolling test measurement method. A camera integrated with an image recognition function is carried on the unmanned ship to be matched with a water level monitor to obtain the draught of the ship in the inclination test, meanwhile, a weight (weight for the inclination test) with the known weight is moved on the ship to enable the ship to generate a certain heeling angle, and the heeling angle of the ship body is automatically obtained through a ship body attitude measurement module; then through a data processing module, the gravity center position and the displacement of the ship can be reversely deduced based on the ship statics principle by using the measured draft, the heeling angle and the torque of the moving heavy object; compared with the prior art, the method has the advantages that the automation degree is high, data reading is more accurate, the time consistency of data is higher, human errors can be effectively avoided, the test risk is reduced, and the test efficiency is greatly improved.

The invention relates to a method and a device for determining a sensitivity calibration coefficient of a nuclear reactor detector. The method comprises the following steps: carrying out a whole core flux diagram experiment to obtain an actually measured current of a detector; determining a sensitivity correction factor according to the actually measured current and the predicted current of the detector; determining out-of-pile axial power deviation according to the sensitivity correction factor and out-of-pile response current distribution; the out-of-pile response current distribution represents a current set of all out-of-pile detectors in each axial section; fitting to obtain a response sensitivity calibration coefficient according to the out-of-pile axial power deviation and the in-pile axial power deviation; the in-pile axial power deviation is obtained based on theoretical xenon oscillation simulation. By adopting the method, the test cost and the test risk can be greatly reduced.

The invention discloses a mechanical property testing method, a mechanical property testing environment box and a testing system, the mechanical property testing environment box is used for testing the mechanical property of a material in a gaseous hydrogen pressure environment, and the mechanical property testing environment box comprises a box body cover, a box body, a stretching mechanism and a control mechanism; the box body cover and the box body are detachably and hermetically connected; the stretching mechanism comprises an upper clamp, a lower clamp, a hydraulic transmission module and a hydraulic driving module, the upper clamp, the lower clamp and the hydraulic transmission module are arranged in a box body, the hydraulic driving module is arranged outside the box body, and the hydraulic transmission module comprises a hydraulic rod, a hydraulic cylinder and a hydraulic piston; an upper clamp for fixing the upper end of the sample is fixedly connected with the box body cover; a lower clamp for fixing the lower end of the sample is fixedly connected with the upper end of the hydraulic rod; the control mechanism is arranged outside the box body; the hydraulic driving module is in circuit connection with the control mechanism; according to the invention, the problem of gas leakage in the environment box caused by dynamic sealing failure of the environment box with a dynamic sealing structure is effectively avoided, and a stable and reliable hydrogen pressure environment is provided for material mechanical property test and evaluation.

The invention discloses a legged robot single-leg jumping test bench and a test method. The legged robot single-leg jumping test bench comprises a vertical degree-of-freedom guiding device, a one-way self-locking device and a bench platform. The vertical freedom degree guiding device comprises a vertical stand column and a guiding sliding plate, and the guiding sliding plate is connected to the vertical stand column in a sliding mode. The one-way self-locking device comprises a support, a sliding block, first connecting rod assemblies and a second connecting rod assembly, the two first connecting rod assemblies are symmetrically hinged to the two sides of the support, a sliding rod is fixedly arranged at one end of the support, the sliding block is arranged on the sliding rod in a sliding mode, and a vertical locking column is arranged on the outer side of the other end of the support. One end of the first connecting rod assembly is slidably connected with the sliding column on the sliding block through the sliding groove, the other end of the first connecting rod assembly is provided with clamping blocks, the two clamping blocks are oppositely arranged, the vertical locking column is located between the two clamping blocks, one end of the second connecting rod assembly is connected with the guiding sliding plate, and the other end of the second connecting rod assembly is hinged to the sliding block. The single leg can be protected in the vertical direction, and when an unexpected condition occurs in the testing process, the single leg can be prevented from falling due to instability.

The application discloses an aero-engine lubricating oil interruption test method, sets monitoring parameters in the S1 step, records the monitoring parameters of the engine in the S2 step to the S4 step, obtains monitoring parameter alarm values through the monitoring parameters, interrupts the lubricating oil supply of the engine in the S7 step, and monitors whether the second current gas generator rotating speed, the second current output power, the second current power turbine inlet temperature and the second current ball bearing wall temperature exceed the corresponding first alarm values within the second preset time. Since the signs of bearing failure are directly judged through the monitoring parameters, the situation that the signs of bearing failure are judged by artificial through abnormal phenomena is avoided, the efficiency and accuracy of judging the signs of bearing failure are improved, the monitoring parameters of the engine are obtained through the S2 step to the S4 step, the monitoring parameter alarm values are obtained according to the monitoring parameters, the monitoring parameter alarm values correspond to the actual situation of the engine, and the inaccurate test results caused by the differences between different engines are avoided.

The invention discloses a mechanical property testing environment box and a mechanical property testing method.The mechanical property testing environment box comprises a first box body, a second box body, a lower bottom plate, a motor, a control mechanism and a stretching mechanism; the top of the first box body and the top of the second box body are detachably connected in a sealed mode. The second box body is detachably connected with the lower bottom plate in a sealed manner; the motor is arranged in the first box body; the stretching mechanism is arranged in the second box body; the stretching mechanism comprises an upper clamp, a lower clamp, a threaded sleeve, a screw rod and a support frame; the upper clamp for fixing the upper end of the sample is fixedly connected with the threaded sleeve; a lower clamp for fixing the lower end of the sample is fixedly connected with the lower bottom plate; the lower part of the screw rod is a connecting part which is in threaded connection with the threaded sleeve; the upper end of the screw rod is fixedly connected with the motor; the supporting frame comprises more than two supporting arms and is used for adjusting the vertical position of the threaded sleeve in the second box body; according to the invention, the problem of gas leakage in the environment box caused by dynamic seal failure is avoided.

The invention discloses an automatic design method of an aircraft structure test lever loading system. The method comprises the following steps: acquiring basic data required by lever beam unit modeling; constructing a finite element analysis model; generating a lever beam unit wireframe model, and synchronously completing grid division and assembly constraint application; verifying whether the strength and rigidity of the lever beam unit wireframe model meet preset conditions or not, and if yes, outputting design parameters; carrying out stress constraint topological optimization on the initial design domain of the lever component, and solving to obtain an optimal hole configuration; constructing a structured hole feature database; the hole size matched with the design parameters is output, the hole size is adjusted, and stress is checked; calibrating the gravity center of the lever based on an automatic counterweight algorithm; and outputting the lever three-dimensional model. According to the method, the automatic design of the aircraft lever loading system is realized based on parameterized finite element modeling and multi-objective collaborative optimization, and the design efficiency and reliability are remarkably improved while the structural strength and rigidity are ensured.

The invention relates to the technical field of channel test devices, and aims to solve the problems of low efficiency, poor precision and high risk caused by poor or complex connection of equipment and terminals in an instrument control cabinet channel test process. The invention provides an auxiliary device for an instrument control cabinet channel test, which comprises a positive pole and a negative pole slidably arranged on the positive pole, the end parts of the positive pole and the negative pole extend towards the same direction to form connecting parts, the connecting part of the positive pole is provided with a positive contact, and the connecting part of the negative pole is provided with a negative contact. And interface lines are arranged in the positive pole and the negative pole. According to the invention, frequent connection and disconnection operation is not needed, the efficiency is high, connection of other non-test channels cannot be touched by mistake in the connection and disconnection process, and the operation risk is reduced. The condition of poor contact of the channel is overcome, and the channel testing precision is improved.

The present invention belongs to the technical field of rotary detonation engines, and in particular to an oil injection device of a rotary detonation engine with a detachable fuel nozzle and a working method, wherein the oil injection device is located between an isolation section flow channel and a combustion chamber flow channel, the isolation section flow channel comprises an isolation section outer ring, an isolation section inner ring concentrically arranged inside the isolation section outer ring, the combustion chamber flow channel comprises a combustion chamber outer ring, and a combustion chamber inner ring concentrically arranged inside the combustion chamber outer ring, the oil injection device comprises, from outside to inside, a concentrically arranged oil injection section outer ring and an oil injection section inner ring, the oil injection section outer ring comprises, from outside to inside, a concentrically arranged outer ring manifold and an outer ring oil injection ring, and the oil injection section inner ring comprises, from outside to inside, a concentrically arranged inner ring oil injection ring and an inner ring oil injection cavity, the present invention processes the end face of the oil injection pipe with the fuel nozzle, and adopts a joint to achieve a detachable sealed connection with other components of the oil injection device, so the processing difficulty and cost are relatively lower.

The invention discloses a material mechanical property testing environment box and a testing method, and the material mechanical property testing environment box comprises an upper box body, a lower bottom plate, a control mechanism and a stretching mechanism; the upper box body and the lower bottom plate are detachably and hermetically connected; the stretching mechanism comprises an upper clamp, a lower clamp, a support frame, a ferromagnetic block and an electromagnet; the support frame comprises more than two support arms; one end of each supporting arm comprises a connecting part used for being in sliding connection with a sliding groove in the inner side wall of the upper box body. The other end of each supporting arm is fixedly connected with an upper clamp for fixing the upper end of a sample; a lower clamp for fixing the lower end of the sample is fixedly connected with the lower bottom plate; the inner top wall of the upper box body is fixedly connected with an electromagnet; the support frame is fixedly connected with a ferromagnetic block; the electromagnet is in circuit connection with the control mechanism through a lead hole formed in the inner top wall; according to the invention, the problem of gas leakage in the environment box caused by dynamic seal failure is avoided, and a stable and reliable hydrogen pressure environment is provided for material mechanical property test and evaluation.

The application discloses a kind of clinical trial case report form automatic generation method and system, the application is related to medical instrument test technical field, the method includes: the target clinical trial scheme document is parsed, and medical instrument data is extracted;Based on medical instrument data, the corresponding target case report subform is matched from structured template database;Structured template database includes the hierarchical mapping relationship between medical instrument type and case report subform;The target case report subform is combined, and case report form document is generated.The application is structured to the target test scheme Parsing, then according to the medical instrument data of parsing structured template database is obtained standardization format target case report subform according to the automatic matching, finally, based on target case report subform combination generates case report form document, to significantly shorten the design time of medical instrument clinical trial case report form, improve design efficiency.At the same time, reduce human error, guarantee the reliability of case report form.