86results about How to "Guarantee test safety" patented technology

The invention provides a multi-dimensional vibration control method of a fulcrum bar tail supporting type aircraft model, belongs to the field of vibration active control, and relates to the multi-dimensional vibration control method of the fulcrum bar tail supporting type aircraft model based on a piezoelectric ceramic actuator and applied to an aircraft model wind tunnel test. The multi-dimensional vibration control method comprises the steps that two components of main vibration acceleration of the aircraft model are measured by a pitch acceleration sensor and a yaw acceleration sensor which are arranged on the centroid of the aircraft model, a main vibration vector of the aircraft model is obtained, and the real-time vibration plane of a fulcrum bar is determined; and the inertial force is introduced to solve a dynamic bending moment on an active section of a multi-dimensional vibration damper, and then the stress distribution on the active section is obtained, and the vibration control force is solved in real time according to the stress of the piezoelectric ceramic actuator on the active section. A multi-dimensional vibration active control system is adopted, the stability and reliability of the active vibration control system of a wind tunnel model are improved, the service life of the piezoelectric ceramic actuator is prolonged, and thus the wind tunnel test data quality and wind tunnel test safety are ensured.

The invention relates to a wire clamp special for testing of a transformer. The wire clamp comprises two wire clamp bodies, a bolt penetrating through the two wire clamp bodies and fixing the two wire clamp bodies, and a spring. Installation grooves are respectively formed in the inner sides of the clamping head ends of the two wire clamp bodies. Clamping piece fixing holes and wiring piece fixing holes are formed in the lower portions of the installation grooves. Transformer direct current resistance testing specialized clamping pieces of the same structure or transformer breaker loop resistance testing specialized clamping pieces of the same structure are respectively assembled in the two installation grooves and are fixed in the installation grooves through the clamping piece fixing holes and the wiring piece fixing holes. The wiring piece fixing holes fix wiring pieces at the same time, and wiring screws on the wiring pieces are fixedly connected with wires. By adopting a split structure, the wire clamp is simple in structure and convenient to install, and can improve the accuracy of test data, shorten the test time and lower the misjudgment probability after being used.

The invention discloses a flutter boundary real-time prediction system and prediction method based on an ARMA model, and relates to the field of aircraft flutter tests. The system comprises a signal acquisition module, a data processing module, a stability analysis module and a flutter prediction module which are sequentially connected. The working principle is as follows an acceleration sensor isarranged at a key position of a test object, and a sensor signal is transmitted to an acquisition module of the system through a bus in the test process. After being adjusted and filtered, the signalis transmitted to the data processing module, the processed data is subjected to the stability analysis and the flutter prediction, finally, the flutter speed is outputted, and the flutter speed is judged through a threshold value. The method and the system are applied to the model wind tunnel flutter test and the flight flutter test, the flutter prediction precision can be effectively improved,the flutter boundary can be rapidly predicted in real time, the flutter critical speed is automatically judged according to the set threshold value and provided for professional testers in time, the test safety is guaranteed, and the test cost is reduced.

The invention, which belongs to the helicopter model rotor wing test field, provides a correction-function-contained dynamic balance adjustment phase calculating method of a helicopter model. The method is characterized in that frequency spectrum calculation is carried out on a vibration signal and a rotating speed signal, wherein the signals are obtained by measurement; a reference frequency is obtained based on rotating speed conversion and an amplitude and phase corresponding to the reference frequency are taken out from the vibration and rotating speed frequency spectrum; a vibration phase is corrected by a rotating speed phase; and then calculation is carried out again to obtain an adjustment phase value needing to increase the balance weight. According to the invention, a problem of inaccurate adjustment phase calculation due to the different sensor and collector and the application environment interference can be solved. Therefore, the dynamic balance adjustment phase calculating method that is capable of realizing accurate calculation of the adjustment phase can be established.

The invention discloses a helicopter two-meter-diameter rotor wind tunnel test stand vibration monitoring, early warning and safety protection system. The system comprises an acceleration sensor group, an infrared photoelectric sensor and a processing unit, wherein the acceleration sensor group is installed at a propeller hub of a helicopter two-meter-diameter rotor wind tunnel test stand and isused for measuring vibration response of the test stand; the infrared photoelectric sensor is used for measuring a rotating speed of a rotor; vibration signals collected by the acceleration sensor group and rotating speed signals collected by the infrared photoelectric sensor are sent to the processing unit to be processed, and the processing unit processes, analyzes and records a time domain anda frequency domain of the measured vibration signals. The system has advantages of a simple structure, simple and convenient operation, a good test effect and the like.

The invention belongs to the technical field of hydrodynamic test simulation systems. The invention discloses an aerodynamic lift resistance testing device with a controllable and adjustable pitch angle of an airplane model. The device comprises: a trailer lift axle 1, a first monitorable locking structure 2, a front main dragging rod 3, an electric lifter 4, a rope 5, a multi-degree-of-freedom adjusting reinforcing rod 6, an axle locking structure 7, a vertical linear displacement sensor 8, a pitching posture quantitative adjusting structure 9, a test model 10, a gyroscope 11, a qualitative steel plate 12, a horizontal line displacement sensor 13 and a rigid rod structure 14. Inertia and centroid debugging accuracy of a hydrodynamic test model can be improved, and model test accuracy is improved.

The invention discloses a large-diameter high-speed liquid jet impact test device which comprises a test bed rack, a jet power device, a power bracket device, a liquid jet device, a sample clamping device and an observation device, wherein the jet power device is positioned on the rear side of the test bed rack and is clamped by the power bracket device; the liquid jet device is positioned in front of the jet power device and is fixed on the test bed rack by virtue of a bolt, a liquid nozzle rack is arranged at the front end of the liquid jet device, and a sleeve rack through which only a nylon rod is allowed to penetrate is arranged at the rear end of the liquid jet device; the sample clamping device is positioned in front of the liquid jet device, and a rectangular groove is formed in the middle of the device and is used for clamping the sample; and the observation device is used for observing the speed and diameter of liquid jet. The device can be used for researching notch damage generated by different materials under the impact of high-speed drops of different diameters, the analysis experiment result can guide material selection of wet-steam region steam turbine vanes and other mechanical parts which operate in a water erosion environment, and the test device has significant academic value for further researching the liquid-solid high-speed impact mechanism.

The invention provides an all-purpose bias loading support device and a use method thereof. The support device comprises a support frame arranged around a press machine, an upper hinged support and a lower hinged support are respectively arranged on the upper end and the lower end of a component; and fixed beams in sliding connection with the upper hinged support and the lower hinged support are arranged on the support frame. The support frame can be used for protecting the component; the movable upper hinged support and lower hinged support can be used for adjusting an eccentric distance, thereby guaranteeing the security of personnel and properties in the bias testing; the eccentric hinged support is fixed before the testing so as to guarantee that the hinged support cannot overturn when hoisting a testing component; the constraint on the fixed beams and the hinged support is relieved after the preloading, and the hinged support is downwardly adjusted to a proper position, and then a protection part is added so that the support frame structure can play the protection effect around the component; and meanwhile, the hinged support is prevented from falling. The structure is designed as a multi-part assembling type, the field splicing is simple, and meanwhile the dead-weight of each part is lightened.

The invention discloses a testing device and method of an ignition threshold of a nuclear passive hydrogen recombiner and solves the problem that the high hydrogen concentration accident of a nuclear power station cannot be comprehensively simulated in the prior art. The testing device comprises a piston mechanism, a suspending mechanism and a stainless steel crust used for blocking a flue outlet of the nuclear passive hydrogen recombiner. During introduction of hydrogen, the stainless steel crust covers the flue outlet of the nuclear passive hydrogen recombiner, thus air circulation and dehydrogenation is effectively stopped, and the interior hydrogen concentration of a reaction vessel is enabled to rise fast; after the hydrogen concentration reaches a preset value, fluid drives the suspending mechanism to move, the stainless steel crust is enabled to slide down, the flue outlet of the nuclear passive hydrogen recombiner is exposed, air circulation is allowed in the nuclear passive hydrogen recombiner, and dehydrogenation is achieved under high hydrogen concentration. The high hydrogen concentration accident of the nuclear power station is truly simulated, and excellent reference standards are provided for the study and design of the nuclear passive hydrogen recombiner.

The invention discloses a wind tunnel test device which at least comprises a model, a wind tunnel test section and a model position adjusting part, the wind tunnel test section is located over the model position adjusting part, and the model position adjusting part is connected with the model and can send the model into or take the model out of the wind tunnel test section. The function of bringing the model into or out of the wind field after the flow field is established in the wind tunnel test section is realized, so that the impact load caused by the opening and closing of the supersonic wind tunnel is eliminated, and the test safety of the large-wingspan aircraft model is ensured.

The invention discloses a water meeting gas discharge tester and a use method thereof. The tester comprises a test device, a pedestal device, a gas collecting device and a monitoring device; the test device comprises a water batch box, a water storage cup, a reaction bottle, a heating tube, a water pump and a water injection mechanism; the gas collecting device comprises a pipeline integration block, a gas collecting motor and a gas collecting mechanism; the monitoring device comprises inductors, a power supply module, a touch screen, a control device and a main board; and the touch screen transmits control information to every inductor and the control device through the main board, the main board processes the information detected by the inductors and transmits the processed information to the touch screen, and the touch screen displays the processed information. The water meeting gas discharge tester is a detection device adapting to time developing , and is used to carry out danger characteristic detection and classification of substances or a mixture.

The invention relates to a dam break type debris flow dynamic evolution whole-process simulation test system. The system comprises a model box, wherein the debris flow simulation device is arranged ina centrifugal machine chamber, is used for simulating the whole process of debris flow power evolution, and comprises a storage box, a baffle, a sliding face, a blocking structure and a motor, the storage box and the blocking structure are arranged on the upper portion and the front side of the bottom of the sliding face respectively, the baffle is rotationally arranged at an outlet, facing the bottom of the sliding face, of the storage box, and the motor controls opening of the baffle; a data acquisition system which comprises a sensor arranged in the model box; and a high-speed camera system which is arranged in the centrifugal machine chamber and comprises a high-speed camera and a high-brightness LED light source. Compared with the prior art, the device has the advantages of strong simulation capability, capability of truly reproducing the whole dynamic evolution process of the debris flow, full automation, remote control, simplicity and convenience in use, low economic cost and the like.

The invention relates to the field of full-electronic fuse testing, in particular to a safety error prevention device for full-electronic fuse testing and a use method of the safety error prevention device. The safety error prevention device comprises a simulation load cable, a plurality of simulation loads and a potential detection and alarm device. The simulation load comprises two main core wires and a plurality of connecting cables and plugs, wherein one ends of the two main core wires in the simulator load cable are connected with the connecting cables in series, the other ends of the main core wires are connected with the plugs, and the connecting cables are connected with two connecting end points on the simulation loads. The potential detection and alarm device is arranged in full-electronic fuse testing equipment and comprises a potential detection module and an alarming module, and the potential detection module is connected with a socket, matched with the plugs and connected with the alarm module. The safety error prevention device for full-electronic fuse testing determines that all the simulation loads are connected, otherwise gives an alarm, and guarantees safety testing of a full-electronic fuse.

The invention provides a pressing plate anti-misoperation cover for a relay protection test, and relates to an anti-misoperation device. When the relay protection test is conducted in an incomplete power failure state, careful confirmation is needed, once misoperation is generated, primary equipment of a power substation is tripped, and even the whole substation loses power. The pressing plate anti-misoperation cover comprises an anti-misoperation cover body and an anti-misoperation cover fixing frame. The anti-misoperation cover body is detachably connected to the anti-misoperation cover fixing frame and is a transparent insulator shaped like a left square bracket, and the anti-misoperation cover body comprises a front plate, connecting plates located on the upper side and the lower side of the rear face of the front plate, positive electrode conductors and negative electrode conductors. Light sources are embedded into the middle of the front plate, the positive electrode conductors and the negative electrode conductors are connected to the upper sides and the lower sides of the light sources respectively, the tail ends of the positive electrode conductors and the tail ends of the negative electrode conductors are located on the connecting plates, and the anti-misoperation cover fixing frame is of a hollow square shape and provided with a power source, a positive electrode connecting end and a negative electrode connecting end, wherein the positive electrode connecting end is connected with the positive electrode of the power source, the negative electrode connecting end is connected with the negative electrode of the power source, and the positive electrode connecting end and the negative electrode connecting end are respectively of a long strip shape. By the adoption of the technical scheme, safety of the relay protection test is guaranteed.

The invention discloses a high-voltage current transformer leakage current and error measuring method and system. The method comprises the steps of: obtaining leakage currents of a high-voltage current transformer to be tested under a plurality of test high-voltage voltages; obtaining errors of the high-voltage current transformer to be tested under the plurality of test high-voltage voltages; performing model training according to the leakage currents, the errors and corresponding test high voltages of the high-voltage current transformer to be tested to obtain a leakage current error mappingmodel of the high-voltage current transformer to be tested under the high voltage; and obtaining corresponding errors according to the obtained leakage currents of the high-voltage current transformer to be tested and the leakage current error mapping model. The method and system only measure the leakage current to obtain the corresponding errors in the following error monitoring to obtain accurate errors through measurement with no need for improvement of a high-voltage current transformer without a capacitance shielding structure and with no need for direct error measurement under the highvoltage so as to ensure the cost saving while test safety.

The invention provides an auxiliary device of satellite load whole machine dynamic balance weight. According to the structure, the auxiliary device comprises a weight support, fixing supporting boards and a rubber board; the weight support comprises a U-shaped board and a fixing sheet arranged at the outer side of the bottom of the U-shaped board; the fixing supporting boards are connected to the two side portions of the U-shaped board; the rubber board is connected to the inner side of the bottom of the U-shaped board and is in contact with a rotary cylinder; the side portion of the U-shaped board is clamped in a window of a bearing cylinder and the fixing sheet is in bolt connection with the outer wall of the bearing cylinder, so that the device is fixed to the bearing cylinder; each balancing weight is provided with technical threads, through holes matched with the technical threads in position are formed in each fixing supporting board, each screw penetrates through one through hole and is arranged through the technical threads, and therefore the balancing weights is fixed to the device. According to the auxiliary device of the satellite load whole machine dynamic balance weight, the safety quality problems possibly caused by repeated disassembly and assembly of the balancing weights in satellite load whole machine dynamic balance can be effectively solved, operation can be independently completed by a technician, and the auxiliary device has the advantages of being safe, stable and the like.

The invention discloses an anti-collision door structure of a large geotechnical centrifuge. The anti-collision door structure is installed on the door opening channel of the cabin of the geotechnicalcentrifuge and comprises a buffer door mechanism and a side door mechanism; the buffer door mechanism comprises a sealing plate, bent anti-collision rods, an arc-shaped leveling plate and a levelingplate side face sealing plate; the middle parts of the sealing plate and the arc-shaped leveling plate are connected through a plurality of bent anti-collision rods; the side door mechanism comprisesa plurality of pin shafts; the pin shafts are supported by guide bearings; the guide bearings are installed through H-shaped steel; the middle pin shafts extend towards the middle of a side door shelland are machined into worms; the worms on two sides are connected through a worm wheel; a motor works to drive the worm wheel to rotate; and the worms on two sides are driven to horizontally and axially move through a worm wheel and worm pair; and all the pin shafts synchronously advance and retract and are inserted into pin shaft incoming holes. With the anti-collision door structure of the large geotechnical centrifuge adopted, energy absorption and collision prevention can be effectively achieved when the geotechnical centrifuge is impacted due to accidents; the geotechnical centrifuge will not be affected by the external environment and personnel; and test safety is guaranteed.

The invention discloses a method for measuring a convective heat transfer coefficient; the method comprises the following steps of: finding out a theoretically calculated cooling curve with the best overlap ratio with an actually measured cooling curve based on comparison between the actually measured cooling curve of a sample to be measured in air and the theoretically calculated cooling curve of the sample to be measured in air; and taking the heat transfer coefficient corresponding to the theoretically calculated cooling curve as the convective heat transfer coefficient between the surface of the sample to be measured and the air. The method lays a foundation for obtaining thermal spontaneous combustion critical parameters of a solid propellant or an engine and guaranteeing the test safety. The method is simple in equipment and easy and convenient to operate, the surface heat exchange coefficient of the solid propellant under different conditions can be measured, and the method can also be popularized to measurement of the surface heat exchange coefficient of uniform materials such as liners, heat insulation layers, non-metal materials and metal materials in all directions under different environmental conditions such as water cooling, quenching and heat treatment.

An effective area measurement system for a metal film box comprises a gas source, an automatic gas distribution bench, a pressure transducer, a fixing base, a push rod, a force transducer, a data acquisition apparatus and an industrial control computer, wherein the gas source, the automatic gas distribution bench, the pressure transducer and the fixing base are successively connected through connecting pipes. A connecting pipe which is in communication between the pressure transducer and the fixing base is a first pipeline. The metal film box is installed on the fixing base in a sealing mode, and the inner cavity of the metal film box is communicated with the first pipeline through the fixing base. The push rod is arranged on the top surface of the metal film box. One end of the push rod forms surface contact with the top face of the metal film box, and the other end is connected to the force transducer, The data acquisition apparatus is connected with the pressure transducer and the force transducer. The industrial control computer is separately connected with the data acquisition apparatus and the automatic gas distribution bench. According to the system of the invention, an effective area of the metal film box can be accurately measured, and parameter instability due to continuous changes of operating pressure can be reflected faithfully.

The invention relates to a test platform for verifying a core control strategy of a dynamic positioning system of a water platform. The test platform comprises an offshore part and a shore base part.The offshore part includes a test carrier, a propeller system, a power system, a measurement system, a data processing and driving system, an offshore wireless communication module, and a remote control receiving module. The shore base part includes a main control system, a monitoring system, a shore-based wireless communication module, and a remote controller. The offshore wireless communicationmodule matches the shore-based wireless communication module; and the remote control receiving module matches the remote controller. According to the invention, the test carrier is an unmanned ship oranother water platform instead of a purely numerical dynamic model; the position, posture and environmental information of the test carrier is collected by the sensor, so that real navigation data can be provided in real time; and the dynamic positioning control strategy function and the performance verification have high authenticity and credibility. The control system is separated from the carrier, so that the control strategy debugging and upgrading become convenient and the verification period of the control strategy is shortened.

The invention discloses a disk-shape testing support for zinc oxide arresters. The disk-shape testing support comprises a base; the base is provided with a first cylindrical projection which protrudes upwardly and vertically; the first projection is sleeved with an insulating pipe; the disk-shape testing support further comprises a circular-ring-shaped metal supporting frame; the metal supporting frame is hub-shaped; the center of the circular ring of the metal supporting frame is provided with a second cylindrical projection which protrudes downwardly and vertically; the second projection is inserted into the upper end of the insulating pipe; N threaded insertion holes are distributed evenly in the circular ring of the metal supporting frame, wherein N is a positive integer greater than or equal to 2; and the metal supporting frame is further provided with a grounding terminal. With the disk-shape testing support for the zinc oxide arresters of the invention adopted, the problem of inconvenient fixation and frequent wire replacement in the direct-current leakage test of zinc oxide arresters in the prior art can be solved, and the fixation and support of a plurality of zinc oxide arresters can be facilitated.

The application discloses an ESC test anti-overturning frame comprising a cross beam assembly fixedly connected with a vehicle and supporting wheels for supporting the vehicle inclining laterally. Thecross beam assembly is arranged in the width direction of the vehicle. Two supporting wheels are distributed at the two sides of the vehicle in the width direction of the vehicle respectively in total. When the vehicle inclines leftwards or rightwards at a certain angle, the supporting wheel arranged at the corresponding side will be in contact with the ground to support the vehicle with a certain force, so that the vehicle is prevented from rolling over and the high test safety is guaranteed. Besides, adjusting arm assemblies are arranged between the supporting wheels and the cross beam assembly and are used for adjusting the distances between the supporting wheels and the ground. Therefore, the installation position of the cross beam assembly on the vehicle is determined according to the structural form of the vehicle and then the ground clearance of each supporting wheels is adjusted through one adjusting arm assembly, so that a problem that the existing anti-overturning frame canonly be applied to a vehicle type with a through space below a truck girder is solved,and the applicability of the anti-overturning frame is enhanced.

The invention relates to a power-frequency alternating-current withstand-voltage test device. The power-frequency alternating-current withstand-voltage test device comprises an electric voltage regulation unit, a high-voltage transformer unit, a control unit, a measurement display unit and a protection unit. The electric voltage regulation unit is connected with power-frequency alternating-currentcommercial power; the high-voltage transformer unit is connected with the electric voltage regulation unit; the control unit is in communication connection with the electric voltage regulation unit;the measurement display unit is in communication connection with the electric voltage regulation unit and the control unit; the measurement display unit comprises a measurement part and a display part; and the protection unit is connected with the electric voltage regulation unit and the high-voltage transformer unit. The control unit and the display part of the measurement display unit are integrated into a movable control panel; the electric voltage regulation unit, the high-voltage transformer unit, the protection unit and the measurement part of the measurement display unit are integratedinto an integrated test module; and the control panel is in communication connection with the integrated test module. According to the test device, the test complexity can be lowered, the test efficiency and the flexibility are improved, the test error is avoided, and the test safety is guaranteed.

The present invention provides a heat insulation device and method. The heat insulation device comprises an adapter, an embedded waterway, a solenoid valve, a control instrument and a temperature sensor; a circular hole is formed in the center of the lower end face of the adapter to mount the embedded waterway; the embedded waterway is of a hollow columnar structure coiled by a water pipe around the circumference; a water inlet and a water outlet of the embedded waterway penetrate out from the side wall of the lower part of the adapter; the water inlet of the embedded waterway is connected with an outlet C of the solenoid valve through a pipeline, and an inlet A and an inlet B of the solenoid valve are connected with a water supply pipeline and a water return pipeline of a testing box correspondingly; the water outlet of the embedded waterway is connected with the water return pipeline of the testing box, and the temperature sensor is mounted in the testing box; and the control instrument measures the temperature in the testing box through the temperature sensor, and controls the inlet A and the inlet B of the solenoid valve according to the temperature in the testing box. The formthat the embedded waterway is configured through the adapter is adopted, thus the effects of connection of a test piece clamp with a mechanical decoupling device, and vibration conveying can be achieved, and heat or cooling capacity in the testing box can also be prevented from being downwards transferred through circulating water of the embedded waterway.

The invention discloses a testing device for a wheel track system. The testing device comprises a bogie assembly; a vehicle mass simulation part mounted on the bogie assembly and used for simulating mass loading on the wheels; a fixed foundation hinged to the bogie assembly and the vehicle mass simulation component; a driving part used for driving the four wheels to rotate; four excitation assemblies respectively corresponding to the four wheels; and an excitation assembly used for loading transverse, longitudinal and vertical forces and loads to the corresponding wheels. The test device can simulate the motion states of the wheels under different working conditions indoors, is convenient to measure and high in measurement precision, has high reproducibility of test data, and can provide reliable test data for researching the wheel-rail relationship.

The invention discloses a power failure locking device with a loading beam for a fatigue testing machine. The power failure locking device with the loading beam for the fatigue testing machine comprises the loading beam, guide posts, bolts and actuators, wherein the guide posts are connected into guide holes of the loading beam in a guiding manner; side walls of the guide holes are also provided with open structures which run through the loading beam in an up-down manner and horizontally run through the side walls of the guide holes and an external environment; the open structures comprise first open sections extending along the left-right radial directions of the guide holes; the first open sections run through the side walls of the guide holes; the two side walls of each first open section are mechanically connected through the corresponding bolt to form the interference fit between the corresponding guide hole and the corresponding guide post; one side wall of each first open section is provided with a jacking and loosening hole which is run through in a front-to-back manner; and each actuator penetrates through the corresponding jacking and loosening hole and is tightly jacked on the other side of the corresponding first open section to form the clearance fit between the corresponding guide hole and the corresponding guide post. According to the power failure locking device with the loading beam for the fatigue testing machine, in the working process of the fatigue testing machine, the loading beam is always in a locking state; once an accidental power failure occurs, the loading beam can also stay at a current position; and the testing safety is guaranteed.