520results about How to "Test security" patented technology

The system and method described herein may provide a virtualized replication and high availability environment. In particular, a virtualized production server may run one or more virtual machines in one or more child partitions and have a replication and high availability engine installed in a parent partition. The replication and high availability engine may automatically discover the virtual machines running in the child partitions and automatically synchronize all files associated with the virtual machines to a virtualized replica server. Furthermore, the replication and high availability engine may continuously replicate subsequent changes to the files associated with the virtual machines running in the child partitions to the virtualized replica server, which may then create on-demand virtual machines from the synchronized and replicated files to handle switchover, failover, switchback, and failback events associated with the virtualized production server or the virtual machines running in the child partitions associated therewith.

The invention provides a method for determining an indicator diagram of electrical parameters of a rod-pumped well and belongs to the technical field of oil production of oil fields. The method aims at achieving convenient and practical measurement of the indicator diagram of the electrical parameters of the rod-pumped well on site. The method is characterized in that top dead center moments and bottom dead center moments are determined periodically, active powers of electrical parameters of up strokes and down strokes of the rod-pumped well are processed in a decomposition mode, and input end active power of the up strokes and the down strokes is obtained respectively and are calculated and converted into wellhead loading force; adjustment is conducted through balance blocks for operation balance of a pumping unit, actually measured data are used for further correcting the weights of the crank balance blocks of the oil pumping unit or retrieving the weights of the crank balance blocks after adjustment, actually measured active power is converted into wellhead loading force F<upper force i>, wellhead loading force F<lower force i> and superposed wellhead loading force F<upper and lower force i>, the wellhead loading force F<upper force i>, the wellhead loading force F<lower force i> and the superposed wellhead loading force F<upper and lower force i> are calculated, superposed and converted into wellhead loading force, and the indicator diagram of trends of the electrical parameters is determined before and after superposition with the crank balance blocks. According to the method, on-site testing is convenient and practical, and online automatic measurement is achieved.

The invention discloses a device for detecting a storage battery, comprising a CPU, an operational amplifier, a multi-way switch, a digital / analog (D / A) converter, a high-power MOS tube, a coupling capacitor, a programmable bandpass filter and an analog / digital (A / D) converter. The high-power MOS tube is connected on a storage battery discharge detection circuit in series. The CPU is used for controlling discharge of the storage battery so as to generate excitation current. The detected current signals and voltage signals are amplified by the operational amplifier after the coupling capacitorsubtracts the direct current component, and the signals are transmitted to the A / D converter to be changed into digital signals after the programmable bandpass filter gets rid of the interference signals, then the digital signals are transmitted to the CPU to be processed and complex impedance of the storage battery under the corresponding frequency can be obtained after arithmetical operation. The CPU can control the MOS tube via the D / A converter to change the waveform and frequency of the discharge current of the storage battery so as to realize measuring a plurality of frequencies of the storage battery. A detecting method using the device can be used for detecting the storage battery by an AC discharge method in multiple frequency points.

The invention provides a device for testing push-pull force of an electromagnet, which comprises a force sensor, a displacement feeding and backing device, a testing bench, a V-shaped block, a compression device, a stepper motor, connecting or fixing accessories and the like. The force sensor is used for measuring electromagnetic force generated by the electromagnet in different positions or under different currents; the displacement feeding and backing device is used for controlling the stroke of the armature of the electromagnet or fixing the armature in the required position; the testing bench is used for mounting the V-shaped block, the displacement feeding and backing device, the stepper motor and the like; the V-shaped block is used for mounting electromagnets with different sizes and different shapes; the compression device is used for compressing electromagnets with different heights; the stepper motor is used for controlling the displacement of the displacement feeding and backing device; and the connecting or fixing accessories are used for connecting or fixing and adjusting other components.

The invention discloses an omni-mobile balance capacity assessing and training system of stroke patients. The omni-mobile balance capacity assessing and training system structurally comprises a fixingdevice, a safe device, a moving device, a data collecting device, a data processing and displaying device and a visual interference device; on the basis of multi-mode signal collecting and processingand by combining friendly human-computer interaction between voice prompt and the tested persons, a human body balance capacity assessing virtual task based on the Unity 3D design is completed by thestroke patients, information such as age, gender, stature, weight, pressure center path, heart rate, blood pressure, electromyographic signal and joint angle of the stroke patients are obtained accurately, and balance capacity assessing results of the stroke patients are comprehensively given; the system can further automatically formulate a corresponding training scheme according to the assessing results, and balance capacity training of the stroke patients is achieved by combining a balance capacity training game in VR glasses; and the omni-mobile balance capacity assessing and training system is simple in structure, easy and convenient to operate, capable of moving omni-directionally and high in reliability, and has good promotional value.

The invention discloses a dynamic loading device of a railway locomotive drive component and belongs to the field of locomotive engineering tests. The two ends of vertical oil cylinders, the two ends of transverse oil cylinders, the two ends of longitudinal electric locating push-and-pull rods and the two ends of limiting push-and-pull rods are each provided with a ball hinge. One end of each vertical oil cylinder, one end of each transverse oil cylinder, one end of each longitudinal electric locating push-and-pull rod and one end of each limiting push-and-pull rod are connected with a cage-shaped loading frame, and the other end of each vertical oil cylinder, the other end of each transverse oil cylinder, the other end of each longitudinal electric locating push-and-pull rod and the other end of each limiting push-and-pull rod are connected to a base. The six-freedom-degree movement of the loading frame can be controlled. An upper frame of the loading frame is provided with a special connector and can be rapidly connected with a simulation steering frame with the tested drive component, in this way, dynamic loading can be effectively conducted on the drive component installed in the steering frame, and the vibration working environment and the stress working environment of the drive component are simulated. The dynamic loading device is suitable for different tested drive components through the fixed structure, the problem that oil cylinders are frequently dismounted and mounted is solved, a workload is reduced, the oil cylinders are loaded in a tensioned mode, and meanwhile spring struts are connected in parallel to complete loading of vertical static component force. The dynamic loading device of the railway locomotive drive component is mainly used for load testing of the railway locomotive drive component.

The invention discloses a drop hammer impact test device used for simulating vehicle collision. The device comprises a drop hammer which can simulate vehicle crush. The drop hammer comprises a crushable hammerhead and a counterweight cap. The crushable hammer is used for impacting a test piece and transferring the impact force. A clump weight is arranged on the counterweight cap. The crushable hammerhead and the counterweight cap are coaxially assembled through a sliding structure. A crushable spring is arranged between the crushable hammerhead and the counterweight cap. The end part of the crushable spring is connected with the crushable hammerhead or the counterweight cap through a force sensor. Both ends of an impact simulation test column are respectively constrained and fixed on a test cap according a boundary condition. The whole drop hammer is lifted by a lifting mechanism, and free-fall impact loading is carried out on a part to be impacted on the test column. According to the invention, drop hammer test loading is used for simulating vehicle collision; the drop hammer impact test device has the advantages of real stress simulation, high test precision and being safe and reliable; the cost is far less than the cost of a conventional real vehicle collision test; and the drop hammer impact test device can be promoted in the fields of structure test and vehicle production and development.

The invention discloses a carbon fiber gas cylinder detection line and a carbon fiber gas cylinder detection method. The detection line includes, in a front-to-back arrangement manner, a water pressure test apparatus, a water pressure auxiliary test apparatus and an air tightness test apparatus. The water pressure test apparatus includes a test rack, a test operation bench, a pressurizing apparatus, a test case installed on the test rack, and test trolleys for stably placing a plurality of to-be-tested gas cylinders. The water pressure auxiliary test apparatus includes a gas cylinder fixture, a transporting trolley, and a gas cylinder water-pouring-away and drying device. The air tightness test apparatus includes an air tightness detection apparatus and a second air supply apparatus for supplying air to the to-be-tested gas cylinders. The air tightness test apparatus is in a cabinet structure or a ground trough structure. The detection method includes the steps of 1) water pressure test; 2) water pouring-away and drying treatment; and 3) air tightness test. The detection line is reasonable in design and simple in operations, is good in use effects, and can easily and quickly complete water pressure test and air tightness test for a plurality of carbon fiber gas cylinders.

The invention relates to a large transformer, in particular to a test method for large transformers. A large transformer differential protection system test method comprises a different protection relay of a transformer, a phase meter and an ammeter and comprises the steps of: 1, selecting the ranges of the phase meter according to the test current for the check of a phase angle; switching the display picture of the differential synthetic protection relay to a differential current display unit; 2, connecting a power supply, utilizing the ammeter and the differential synthetic protection relay to check the current passing the transformer; 3, utilizing the phase meter at the current input of the differential protection relay to check and record the phase difference of the cophase currents at two sides; 4, simulating the fault state of the transformer, measuring the phase angle and the detection differential current on the relay, confirming the reliable operation of the differential protection relay under the default state; 4, ending the test, turning off the power supply and recovering former wires.

The invention discloses a high-pressure transducer testing system which comprises an upper computer part and a lower computer part electrically connected with a high-pressure transducer. The upper computer part comprises a human-computer interface module and a PLC (Programmable Logic Controller) module, and the lower computer part comprises a power unit module, a motor module, an input side module and an output side module which are sequentially and electrically connected. The testing system can universally support the debugging and the testing of the high-pressure transducer in the development process of the high-pressure transducer and directly detect the control algorithm and the effect of the high-pressure transducer to further ensure the testing safety, improve the testing efficiency and reduce the energy consumption.

The invention discloses an automobile seat strength testing method with a single hydraulic cylinder to act, and belongs to the field of tests for the strength of an automobile seat. The testing method comprises the steps of installation of a seat to be tested, loading of the hydraulic cylinder, regulation of angles and positions, and testing of the automobile seat. The testing method is characterized in that the same loading hydraulic cylinder is used for testing a headrest, a backrest and a seat cushion of the automobile seat, and the loading hydraulic cylinder can adjust the loaded height and the loaded angle of the automobile seat. In the testing process, the loading device does not need to shift and change longitudinally, and only the angle and the height need to be adjusted. The automobile seat strength testing method with the single hydraulic cylinder to act has the technical advantages that tests are loaded through the hydraulic cylinder, a loading source is simplified, the whole loading process is safer and more reliable, and the repeatability of test data is high.

The invention discloses a testing system and a testing method for an electronic control unit of an automobile engine. The testing system comprises a signal simulation unit, an electronic control unit, a load unit and a monitoring unit, wherein the signal simulation unit is connected with the electronic control unit by a motor wiring harness and used for simulating cranking signals and cam signals generated when a motor operates according to an externally-input rotate speed and sending the cranking signals and the cam signals to the electronic control unit; the electronic control unit is used for acquiring on-load running control signals according to the cranking signals and the cam signals as well as control parameters and sending the on-load running control signals to the load unit; the load unit is an actual engine component, connected with the electronic control unit by the motor wiring harness and used for executing action according to the on-load running control signals sent by the electronic control unit; and the monitoring unit is used for monitoring the states of the electronic control unit and the load unit, and sending the control parameters input by the user to the electronic control unit in a calibration state. The testing system and the testing method can simultaneously carry out off-vehicle test on the ECU (electronic control unit) and use the actual engine component to compensate for the reality insufficiency existed of the traditional off-vehicle test so as to achieve the effect of carrying out reliable, low-cost and local test on the ECU (electronic control unit).

The system and method described herein may provide a virtualized replication and high availability environment. In particular, a virtualized production server may run one or more virtual machines in one or more child partitions and have a replication and high availability engine installed in a parent partition. The replication and high availability engine may automatically discover the virtual machines running in the child partitions and automatically synchronize all files associated with the virtual machines to a virtualized replica server. Furthermore, the replication and high availability engine may continuously replicate subsequent changes to the files associated with the virtual machines running in the child partitions to the virtualized replica server, which may then create on-demand virtual machines from the synchronized and replicated files to handle switchover, failover, switchback, and failback events associated with the virtualized production server or the virtual machines running in the child partitions associated therewith.

The invention discloses an image anomaly detection device and method. The device comprises an acquisition module and a comparison module; the acquisition module is used for synchronously acquiring image frames which a display terminal under detection displays; resolution of the acquisition module is greater than that of the display terminal; the comparison module is used for comparing the acquired image frames to a preset reference frame and judging whether or not anomalies occur to the acquired image frames according to comparison results. The image anomaly detection device and method has the advantages that quality of an image displayed on the display terminal is automatically tested so that detection labor is greatly relieved; testing results are more accurate, and chances that missing image anomalies occur in testing are slimmed; testing is simple, safe and reliable, and defects of a manual testing method are made up.

The invention relates to an in-situ testing system for a flight control system loading mechanism. The system comprises a portable ruggedized computer and a testing device. The testing device comprises a control lever and a joystick clamp. A force sensor is connected between the control lever and the joystick clamp, an angle sensor is arranged on the joystick clamp, and the force sensor and the angle sensor are electrically connected with a programmable communication interface (PCI) data acquisition card inserted into the fuse ruggedized computer respectively. The in-situ testing system is simple in structure, small in size, convenient to operate and capable of achieving a real-time, fast, correct, reliable and safe test for joystick force and joystick displacement, can generate a joystick force-joystick displacement characteristic ccurve automatically through testing software and achieves performance judgment for the loading mechanism, and the problem that the loading mechanism cannot be detected in in-situ mode due to the fact that an aeronautical maintenance support department is short of detecting devices is solved.

The invention relates to a performance test method of a hydraulic control unit of a car brake system. The performance test method includes the following steps that a performance test system of the hydraulic control unit of the car brake system is arranged, the performance test system comprises a pressure boosting device, a hydraulic pipeline system, a control measurement device and an environment simulation device, the pressure boosting device comprises an oil tank, a variable pump, a pressure-stabilization energy accumulator, a servo proportional valve, a first pneumatic ball valve and a second pneumatic ball valve, the hydraulic pipeline system comprises a first simulation main cylinder, a second simulation main cylinder, a first oil can, a second oil can, pneumatic ball valves from the third one to the twelfth one, the hydraulic control unit, hydraulic steel cylinders from the first one to the fourth one and an exhaust constant displacement pump, and the control measurement device comprises an industrial personal computer and a sensor. The flow and active pressure boosting performance of a plunger pump in the hydraulic control unit under different back pressure, pressure and temperature are tested. The sealing performance and response time of an electromagnetic valve in the hydraulic control unit are tested. The volume of an energy accumulator in the hydraulic control unit is tested.

The invention provides a wireless terminal performance test method and a wireless terminal performance test device. According to the method, a performance test on an LTE-V2X terminal under an anechoicchamber environment is achieved. Firstly, a test system including an anechoic chamber, and first test equipment, a sending end, a channel simulator, an adjustable attenuator, a receiving end and second test equipment connected in sequence along a signal transmission direction in the anechoic chamber is built. When a test is performed, a signal propagation path loss value under a scene is determined according to channel models corresponding to the different scenes, when a signal propagation path loss value can be simulated by the channel simulator cannot reach the signal propagation path lossvalue needed by the scene, the actual signal propagation path loss value under the scene is simulated by the sum of the signal propagation path loss value of the channel simulator and an attenuation value of the adjustable attenuator, a simulated path loss range is increased, and the problem that when a performance test is performed in a laboratory, the channel simulator cannot simulate the signalpropagation path losses under all the scenes is solved.

The invention relates to a virtual debugging method for an automatic workshop based on a digital factory. The method comprises the following steps: developing a communication plug-in between the automatic workshop and an external application program by utilizing Visual Components software API, determining a communication interface and driving a virtual simulation system model to act by the external application program; running a controlling application program of the automatic workshop, observing action conditions of all equipment in simulation software, adjusting the number of all the equipment, process parameters and a workshop control strategy, and shortening waiting time of the equipment, thus improving the production efficiency of the automatic workshop. The method is based on the digital factory and has the advantages that design optimization of a workshop layout, project approachment, production process optimization and workshop control strategy validation can be carried out before the automatic workshop is really put into operation; in addition, under the condition of no actual equipment, a software system can be debugged, so that the research and development cycle can be shortened and the cost of enterprises can be effectively reduced.

The invention discloses a train body chassis fatigue strength test bed and a testing method. The test bed comprises a train body chassis (1) for the testing and an actuator (2) used for fixing the two ends of the chassis (1), wherein the other end of the actuator (2) is fixed on a counter-force base (3); the counter-force base (3) is fixed on the end part of a basin-shaped foundation (4); the chassis (1) is placed on a support device (5); the support device (5) is fixed on the two sides of the basin-shaped foundation (4); a six-freedom vibration excitation device (6) is arranged inside the basin-shaped foundation (4); a vertical loading device (7) and a dragging device (8) are fixed on the upper part of the six-freedom vibration excitation device (6); the other ends of both the vertical loading device (7) and the dragging device (8) are respectively connected with the chassis (1). The test bed can finish the fatigue strength test of one train body chassis or the fatigue strength test of two train body chassis, and is low in test cost, high in test efficiency, and more real and more reliable in test result.

The invention discloses a simulated electromagnetic disturbance source for an isolating switch. The simulated electromagnetic disturbance source comprises a testing transformer, a capacitive divider, an adjustable grounding capacitor, a power supply side analog capacitor, a vacuum circuit breaker switch, a discharging sphere gap and a load side analog capacitor. The original side of the testing transformer is connected with a power supply, and the auxiliary side is serially connected with the capacitive divider. The power supply side analog capacitor is parallelly connected with the capacitive divider. The anode of the power supply side analog capacitor is successively connected with the vacuum circuit breaker switch, the discharging sphere gap, the load side analog capacitor and a grounding capacitor in series. The cathode of the power supply side analog capacitor is grounded. The simulated electromagnetic disturbance source can truly simulate an electromagnetic disturbance process and a ground potential increase process in a switching-on process and a switching-off process of the isolating switch and can output a 1.1MHz high-strength electromagnetic field. Furthermore the simulated electromagnetic disturbance source for the isolating switch has advantages of convenient assembling, simple operation, high testing safety and high precision.

The invention discloses a multifunctional probe bench test system used for radiation experiment of x-ray and gamma-ray. The system comprises a probe test platform and a radiation protection camera obscura (5). The probe test platform comprises a chip to be measured (1), a lead container (4) with a built-in radioactive source (3) and a microscope (2) which is used to observe changes of the chip to be measured. The probe test platform is arranged in the radiation protection camera obscura (5). An upper end of the lead container is opened and the chip to be measured (1) is arranged on the opening of the lead container. A probe seat (8) is arranged above the chip to be measured (1). A space position adjusting device, which is used to adjust the space position of the chip to be measured (1), is arranged on the bottom of the lead container. The system possesses a test function of the common probe bench. A photon radiation chip test can be conveniently and safely realized by using the system.

A circuit for a series motor for a power tool is disclosed, wherein reliable switching is achieved by means of two electronic switches, without the use of a mechanically disconnecting switch. To this end, two electronic switches, preferably triacs, are preferably connected in series to each other, the voltage drop across the triacs being continuously monitored by a monitoring circuit. A check for faults can be carried out before switching on the power tool. Alternatively, a fusible cutout can be tripped by means of a protective switch connected in parallel thereto.

The invention relates to an obstacle simulation method and device in the unmanned vehicle test scene. The method comprises steps that the position of a tested vehicle or the travel time of the testedvehicle are acquired; if the position of the tested vehicle is the preset position or the travel time is the preset time, an obstacle is triggered to move according to the preset travel track and thepreset speed. The method is advantaged in that based on the position of the tested vehicle or the travel time of the tested vehicle, the obstacle is triggered to move according to the preset travel track and the preset speed, a test case can be repeated, the test is safer, and test accuracy can be improved.

The device and method of detecting braking performance of safety catcher in mine lift container is disclosed. The detecting method includes initializing, depressing the test key to select test data storing position and waiting for the test signal, sending the rope breaking signal to the braking performance detecting device for detecting the idle stroke time, the braking time, the wedge block displacement, the buffer rope withdrawal length, the braking distance, the braking deceleration and other parameters of the safety catcher, and showing the detecting result in the LCD, judging the performance of the safety catcher and performing the computer analysis of the test data.

A cabinet box comprises a plurality of independent, explosion-proof chambers. A battery wiring assembly for receiving and testing a battery is attached to an inner wall of an explosion-proof door, and an electrical connector is provided on an outer wall of the door. The assembly is placed inside a chamber, and the door seals the chamber. The temperature in each chamber is controlled independently, allowing batteries to be tested simultaneously at different temperatures. An air-circulating temperature-control module can be in a chamber, or a temperature controller with a refrigeration sheet can be integrated with the battery wiring assembly for direct battery contact. Separate, independent explosion-proof chambers effectively eliminate the possibility of a battery explosion in one chamber causing a chain-reaction explosion in another chamber. Modularity allows damaged parts to be replaced easily. An external battery testing machine can connected to the connector on each door.

The invention discloses a transonic wind tunnel test supporting device, an installation method and application thereof, and aims to solve the problems that the test result is partially distorted, certain potential risk is present and the accuracy of test data is influenced when an aircraft carries out wind tunnel test by adopting an existing concave bent supporting mechanism. In the device, the existing concave bent supporting structure is improved, so that the test result is more accurate; meanwhile, the bearing mode is changed into tension-compression bearing, so that the longitudinal bearing area, rigidity and strength are improved, and model vibration in test is reduced. Under the coordination of a linear supporting rod and a wind tunnel curved knife, the device can realize continuous variable attack angle test, the attack angle variation range is enlarged, and the test efficiency is greatly improved. The device is reasonable in design and simple in structure, can effectively improve the accuracy of data and the efficiency of test and reduce vibration in test, and has a good application prospect.

The invention discloses a stretching stress testing machine used in a high-temperature and high-pressure hydrogen environment. The stretching stress testing machine used in the high-temperature and high-pressure hydrogen environment comprises a safety room, a stretcher, a high-temperature autoclave system and a gas supply and exhaust system, wherein the safety room comprises an airtight safety isolation room; a gas inlet and a gas exhaust port are formed in the safety isolation room; a carbon dioxide gas cylinder group is connected with the gas inlet of the safety isolation room; the high-temperature autoclave system is arranged in the safety isolation room and comprises a high-temperature autoclave placed in a heating furnace; a stretching rod inlet, a nitrogen inlet, a hydrogen inlet and a gas exhaust port are formed in the high-temperature autoclave; the gas supply and exhaust system comprises a nitrogen inlet pipeline, a hydrogen inlet pipeline, a gas exhaust pipeline and a safety pipeline. Through the safety isolation room and a flame arrester and by a high-temperature thermal starting and stopping experiment process, the circumstance that high-temperature hydrogen leaks and is in contact with air is prevented, and the possible circumstance of serious hydrogen embrittlement of an autoclave body material in a normal and low temperature region at the temperature of 220 DEG C or below is avoided, so that the purposes of accurate testing, safe testing, operation convenience and long service life of equipment are achieved.