321 results about "Safety design" patented technology

A method for predicting risk and designing safety management systems of complex production and process systems which has been applied to an FPSO System operating in deep waters. The methods for the design were derived from the inclusion of a weight index in a fuzzy class belief variable in the risk model to assign the relative numerical value or importance a safety device or system has contain a risk hazards within the barrier. The weights index distributes the relative importance of risk events in series or parallel in several interactive risk and safety device systems. The fault tree, the FMECA and the Bow Tie now contains weights in fizzy belief class for implementing safety management programs critical to the process systems. The techniques uses the results of neural networks derived from fuzzy belief systems of weight index to implement the safety design systems thereby limiting use of experienced procedures and benchmarks. The weight index incorporate Safety Factors sets SFri {0, 0.1, 0.2 . . . 1}, and Markov Chain Network to allow the possibility of evaluating the impact of different risks or reliability of multifunctional systems in transient state process. The application of this technique and results of simulation to typical FPSO/Riser systems has been discussed in this invention.

The invention relates to a flying mesh catapulting device for acquiring a discarded spacecraft and particularly relates to a flying mesh catapulting device for on-track acquisition of a discarded spacecraft and track resetting, belonging to the field of space mechanism designs. The flying mesh catapulting device concretely comprises a flying mesh, a flying mesh catapulting device and a rope release and control mechanism. An initiating explosive device is catapulted in the acquisition device, and the flying mesh can automatically unfold and realize retention of configuration in the process of flying towards a target; and after the flying mesh finishes the envelopment for the target, a mass block for guiding the flying mesh to unfold can automatically tighten the opening of the mesh and lock the target by means of self residual kinetic energy, and meanwhile, a safety design and a reliability redundancy design are realized, so that the safety of the acquisition device is ensured. The flying mesh catapulting device has the advantages of light weight and small size so as to be convenient for realizing modular design; and the flying mesh catapulting device can be used as an on-track target acquisition executing mechanism of a space robot system and particularly suitable for an on-track acquisition and clearing tasks for the discarded spacecraft.

The invention provides a device and system used for device-to-device secure communication. According to the device and system used for device-to-device secure communication, a first user device determines a second user device to directly communicate with the first user device, a first network device generates secure configuration information of device-to-device communication for the first user device and the second user device which plan to carry out direct communication, and sends the secure configuration information to the first user device and the second user device, and the first user device and the second user device establish direct communication according to the secure configuration information. Compared with the prior art, the device and system used for device-to-device secure communication put emphasis on the secure feature of D2D communication. Besides, due to the fact that device used for the D2D communication can simultaneously support communication via an access link and a D2D link, the secure design of the D2D link does not affect the security of the access link. By means of the secure scheme, the device and system used for device-to-device secure communication can protect data flows from being received by a third party, and enables a receiving party to detect inserting and replacement of data groups.

The invention relates to the field of information security, cryptography and encrypted circuits, provides detection on electromagnetic fault injection attack for information security related integrated circuits such as the encrypted circuit, and ensures to respond timely when the attack happens. Therefore, the invention adopts the technical scheme that: the structure of a detector applied to an integrated circuit for detecting electromagnetic fault injection attacks comprises phase inverters A1, A2, A3, A4 and A5, wherein the phase inverters are cascaded to form a ring oscillator, the ring oscillator is buffered through a phase inverter B and outputs a channel of oscillation signals directly input to a combinational logic delay comparative structure Detector1, another channel of oscillation signals is input to another combinational logic delay comparative structure Detector2 through the reverse action of a phase inverter C; and an input signal of each of the two Detectors is output to a clock input end of a trigger of the corresponding Detector through the combinational logic of the Detector. The detection method and the detector are mainly applied to safety design of the integrated circuit.

A prediction method for thermodynamic responses and fatigue-creep damage of a high-chrome steel material is disclosed. The method includes constitutive model building, material parameter determination, numerical integration algorithm designing, damage analyzing, and the like. Compared with the prior art, the method can accurately simulate thermodynamic responses of the high-chrome steel material under different loading conditions, and can analyze fatigue, creep and fatigue-creep mutual damage of the material, thus providing a more reasonable and reliable theoretical model for service lifetimeprediction and safety design standards of supercritical generator unit components operated under complex changeable environments.

The invention belongs to the field of flood control safety design of reservoirs, and relates to a method of determining downstream design flood of cascade reservoirs. The method comprises the following steps that by the adoption of the Copula function, multi-dimensional simultaneous distribution of the section flood volume and the regional flood volume of the reservoirs is constructed, the explicit expression of a conditional probability function is deduced, the frequency curve of the conditional probability is dispersed, and according to the principle of probability combination discrete summation, the design value and the corresponding probability of the annular maximum peak discharge of downstream sections are determined after flood regulation is conducted through the cascade reservoirs. The method can overcome the defects of traditional determination technologies of the design flood of the cascade reservoirs, and provides more comprehensive reference information for cascade planning and development of drainage basins.

The invention relates to a novel hook design which provides additional safety features to reduce the potential for accidents and provides additional protection to the operator. The invention may be applied to overhead hoist hooks, chain hooks, wire line hooks, and many other hooks. The safety design features include a spring activated trigger and latch mechanism, a latch stop, a trigger guard, and a trigger lock mechanism which may or may not utilize a spring to activate it. The safety latching lifting hook provides for ease of connection (hooking) and ease of release (unhooking) with a trigger guard to protect the operator's hand and the trigger latch mechanism.

The invention relates to a prediction method and device of thermal-runaway safety of a power battery and a computer-readable storage medium. Initial autogenetic-heat temperature of the first power battery is obtained; the highest temperature at the time when a thermal runaway of the first power battery occurs is obtained on the basis of a thermal-runaway reaction kinetics model of the power battery; and the thermal-runaway safety of the first power battery is judged according to a relationship curve of the initial autogenetic-heat temperature and the highest temperature rise. According to theprediction method of the thermal-runaway safety of the power battery, the thermal-runaway safety of the first power battery can be predicted in a case of not making the whole battery, necessary processes of assembling the whole power battery in a traditional safety design process are reduced, a power-battery design and development cycle is shortened, design and development costs are saved, and efficiency of power-battery safety design is improved.

The invention discloses a 1400-DEG C high-temperature thermal-mechanical coupling test device for the aerofoil structure of a hypersonic vehicle, which comprises a test sample of the aerofoil structure of the hypersonic vehicle, a silicon-molybdenum heating array, a water-cooled metal-loading component, a U-shaped water-cooled channel, a force sensor, a hydraulic actuator, a temperature sensor and a computer. Because the water-cooled metal-loading component is designed into a U-shaped hollow structure, the problems of high-temperature softening and deformation existing in the metal-loading component at 1400 DEG C are solved by using a method of cooling the inside of the metal loaded component with flowing liquid, the high-temperature (up to 1400 DEG C) thermal-mechanical coupling test on the aerofoil structure can be realized, and the ultimate strength of the aerofoil structure in high-temperature thermal-mechanical complex environment and other important parameters can be obtained, thereby providing a reliable basis for the safety design of a hypersonic vehicle structure in high-speed, high-temperature thermal-mechanical coupling environments.

The invention discloses a multi-variable flood recurrence period calculating method considering reservoir flood routing calculation. The method is characterized in that symbolic regression is carried out to calculate an explicit representation through genetic programming; a joint probability density function is calculated through a Copula function; then the joint probability density function is subjected to integral operation in a safe area to obtain cumulative probability of the specified annular maximum water level, and finally single-variable recurrence period of the specified annular maximum water level can be calculated as the multi-variable flood recurrence period under the consideration of the reservoir flood routing calculation. According to the method, the reservoir flood routing calculation is considered; a dangerous area is defined based on the annular maximum water level isoline, and thus the hydrological failure mechanism of a reservoir dam can be accurately expressed; the method is applicable to flood dispatching rules at any complexity degree, and scientific and reasonable basis can be provided to the flood control safety design of a reservoir.

The invention relates to the technical field of safety facilities of a reactor, and discloses a passive residual heat removal system for a high temperature gas cooled reactor. The system comprises a plurality of sets of independent residual heat removal sequences, wherein each set of residual heat removal sequence comprises a water cooled wall (1), an air cooler (5), an air cooling tower (6), a reactor pressure vessel (7) and a reactor cabin (8); the water cooled wall (1) is positioned in the reactor cabin (8) and encircles the reactor pressure vessel (7); the installation position of the air cooling tower (6) is higher than that of the water cooled wall (1); and the air cooler (5) is arranged in the air cooling tower (6). A simple passive residual heat removal system is designed by utilizing a passive safety design concept and a little equipment, is only dependent on natural circulation when operated, is not required to be driven by any external force, and is provided with respective independent redundant circulation loops, so that the system is prevented from failing due to the failure of an active part, and the operation safety of the reactor is improved.

The invention discloses a testing system and a testing method for interaction study of melt and liquid metals. The system comprises a test vessel, wherein a heating furnace is mounted inside the test vessel; materials are heated and molten through electromagnetic induction heating so as to obtain high-temperature melt; high-purity metal sodium in the test vessel is provided by a sodium storage tank connected with the bottom of the test vessel, impurity-containing metal sodium discharged by the test vessel is received by a depositing tank and purified by a filtering device on a pipeline, and the purified metal sodium is discharged into the sodium storage tank again; and the testing system comprises an argon circuit and a vacuum pump, and air in the testing system is removed in vacuumizing and argon filling manners so as to provide inert environmental protection for the testing system. In addition, flow of the liquid metal in the testing system is realized by virtue of differential pressure between the gravity and the vessel. The experiment for interaction between the melt and the liquid metal is carried out, so that the fracture behavior characteristic of the melt in a coolant is disclosed, and assessments are provided for safety design of liquid metal reactors.

The invention discloses a temperature-triggered passive accident residual heat removal system for a pool type reactor. The system consists of a direct reactor core cooling system and an auxiliary reactor safety container cooling system. The system has the significant advantage that the direct reactor core cooling system and the auxiliary reactor safety container cooling system share one air cooling system, so that the system design of the reactor is greatly simplified, and the construction cost is saved. The auxiliary reactor safety container cooling system realizes natural cooling through ambient air on the outer side of a safety container, and the process has the characteristic of passiveness. The passive accident residual heat removal system is passive, independent, high in efficiency and high in reliability and meets the safety design requirement for the pool type reactor.

The invention discloses a high temperature-distributed load thermal strength test device for a plane structure of a high-speed missile aerobat, which comprises a plane high-temperature heating unit, a high-speed missile plane test piece, a thermostability insulation thin layer, a temperature thermocouple, a computer, a water sac loader, flexible heat insulation materials, a steel stressing plate, a hydraulic pressure actuator, a loading link rod, a ceramic frame and a force transducer, a thermal environment with a temperature above 1,000 DEG C is generated by the plane high-temperature heating unit, and a flexible heat separation is carried out between the water sac loader which can generate distributed load and a heat source. According to the thermal strength test device, uniform high-temperature distributed load is implemented to the plane structure of the high-speed missile in the thermal environment with a temperature above 1,000 DEG C, and a high temperature load test method closer to the actual stressing state is provided for a safe design of the high-speed missile structure. The device has important application values on military engineering.

The invention discloses a heavy-duty-car rollover-preventing system, and relates to the technical field of heavy-duty-car safety design. The heavy-duty-car rollover-preventing system comprises a gyroscope, distance sensors, a controller, a control panel and hydraulic pressure assemblies. The gyroscope, the distance sensors, the control panel and the hydraulic pressure assemblies are connected with the controller, the gyroscope is installed at the bottom of a middle cross beam of an automobile frame, and the distance sensors are installed at the bottoms of the two sides of the automobile frame; and the hydraulic pressure assemblies are installed on the two sides of the automobile frame, and the control panel is installed in an automobile control room. In the working process, the gyroscope detects the side-lurching state of the automobile frame, the distance sensors detect the distance between the automobile frame and the road surface, and the gyroscope and the distance sensors transfer collected data to the controller; the controller analyzes the data comprehensively, and the side-lurching degree of an automobile is judged and displayed on the control panel; and a driver controls the motion of the hydraulic pressure assemblies through the control panel, balance of the automobile is kept, and the heavy-duty-car rollover-preventing effect is achieved through the technological means.

The invention discloses a device for monitoring changes of internal temperature and pressure of a large lithium ion battery in thermal runaway occurrence and development processes. The device comprises a battery casing, a thermocouple, a connecting structure body and a pressure sensor. The device specifically comprises a nut (1), a battery casing cover plate (2), a thermocouple fixing structural member (3), a fastening nut cover (4), the thermocouple (5), a hollow copper ball (6), a pressure sensor fixing structural member (7), a threaded plug (8), an electrode material (9), a nut (10) and the pressure sensor (11). The test design is mainly aimed at power and energy-storage equipment requiring large lithium ion batteries and the like. The thermocouple and the high-temperature environment pressure sensor are mainly used for detecting temperature and pressure change in the battery and contribute to monitoring of changes of internal temperature and pressure of the battery in the safety design process of the lithium ion battery.

The invention relates to a compound accident residual heat removal system for an accelerator-driven sub-critical reactor. The system consists of a reactor core direct cooling system and a reactor safe container auxiliary cooling system. The reactor core direct cooling system is connected with a main loop and consists of an independent heat exchanger, an air heat exchanger, a smoke discharge chimney and a connecting pipe. In addition, the reactor safe container auxiliary cooling system realizes natural cooling by virtue of ambient air outside the safe container, cold air reaches the bottom of the container through a descending pipe, hot air flows out of a safety shell through an ascending pipe, and the process has the characteristic of being non-active. The compound residual heat removal system has high efficiency, non-activity, independence and high reliability, and meets the safety design requirements of an accelerator-driven sub-critical reactor.

The invention provides a complete distributed protocol test system and a distributed protocol test method and aims to solve the difficult problems of low coordination of multi-node test, inconvenience for centralized control, disorder in data organization and management, low automatic test efficiency and the like in the conventional protocol test process. By the invention, four functions of a query class, an execution class, a file operation class and an analysis class are realized. In order to realize the functions and solve the technical problems, the invention adopts the technical scheme that: the method comprises the steps of frame design, transmission design, protocol design, command design, safety design and rule design; a server/client mode is adopted, a control node is a client, and a test node is a server; the control node serves as a test logic and test manager, performs actual allocation on specific tasks and distributes the actual tasks according to the logic and requirements; and the test node finishes corresponding operation and responds to a main control end.

The application relates to a comprehensive evaluation method and system for thermal runaway safety of a power battery. With the comprehensive evaluation method, multi-scale mechanism analysis and comprehensive evaluation are carried out on the thermal runaway of a battery. According to comprehensive evaluation method, related thermal stability testing is carried at three dimensions of the batterymaterial, the battery pole piece and the single battery body. On the basis of comprehensive comparative analysis of the test data, influences on the thermal runaway of the single battery body by thermal characteristics of different components and the mutual coupling effects between components are determined by combining in situ and ex-situ observation and material characterization methods. The mechanism analysis and thermal safety quantitative evaluation of the thermal runaway of the battery are provided by combining the test result of the adiabatic thermal runaway of the single battery body.The comprehensive evaluation method and system have the important practical value and guiding significance in the safety design and thermal runaway prevention of the power battery for an electric vehicle.

The invention discloses a method and a device for fault injection attack based on simulation. Under the condition of using no special instrument equipment, before the chip flowing, the fault injection attack is implemented, and a protecting effect for the anti-fault injection safety design of the chip is evaluated. According to the invention, the fault injection attack for the chip is realized in a simulating mode, and the evaluation and analysis for the protecting effect for the safety design of the chip are realized with the minimum cost and the highest efficiency in any link of a chip developing flow under the condition of being independent from the specific realization of a chip safety protection scheme.

The invention belongs to the field of traffic safety designs and lane designs. Aiming at the maximum sweeping path width and a difference of a radius between front inner wheels and a radius between rear inner wheels during right turning of a large vehicle, the invention provides a right-turning lane design method by considering a turning characteristic of the large vehicle. Compared with the conventional design method, the design method has the advantage that the safety, the efficiency and the land utilization are improved greatly. According to the technical scheme, the right-turning lane design method by considering the turning characteristic of the large vehicle comprises the following step of: calculating deflection of traces of a dragging articulated vehicle and a small coach, wherein (1) the width of a diversion lane is required to be equal to a sum of a wheel trace inner displacement, namely the maximum sweeping path width, and a lateral clearance, and (2) the right-turning trace of the large vehicle is fit by an asymmetric three-center composite curve with a relatively small curve radius of an entrance lane and a relatively large curve radius of an exit lane; and under the condition that the width of the diversion lane and an inner-arc radius are known, drawing the three-center composite curve of a right-turning lane. The method is mainly applied to lane design.

The invention discloses a robustness safety design method for a multiple input multiple output (MIMO) communication system. Receiving terminals of the method are each provided with a power separator that divides the received power to realize information decoding of the receiving terminal and energy collection simultaneously. If an idle receiving terminal is a potential eavesdropper, a sending terminal adopts methods of precoding and introducing artificial noise, thereby effectively improving system security rate and transfer efficiency of system energy. When the sending terminal only knows part of channel status information of the idle receiving terminal, the robustness safety design is described as a non-convex semi-infinite optimization problem. The non-convex semi-infinite optimization problem can be changed into a positive semi-definite relaxation problem by use of first order Taylor expansion and S-Procedure theorem, and the effective robustness safety design method can be finally provided through a convex optimization tool based iterative algorithm. With safe communication of the system guaranteed, the safety rate of the sytesm is improved remarkably, the energy transfer efficiency of the system is improved, and the communication and energy demands of the user are better met.

A design and a manufacturing method for mini two-wheel automobiles include an automobile realm and a motorcycle realm for manufacturing a mini automobile running with two wheels and kept its balance during running by a principle of a gyroscope, as if it were a motorcycle. When it stops or runs very slowly, an intelligent fall-down frame provided in the mini two-wheel automobile automatically moves down to keep the automobile body balanced on the ground. The mini two-wheel automobile also has other safety designs and structures, with light, safe, gas-effective, convenient and comfortable property.