318 results about "Factor of safety" 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 discloses a seat belt, a seat belt use detection system and detection method. The seat belt comprises a woven belt, a woven belt fastener, a retractor, a clamp, a lock catch matched with the clamp, and a woven belt guide device arranged on a frame, wherein a conductive section is arranged on the woven belt, and a clamp detection device is arranged in the lock catch; and a seat belt extension amount detection device is arranged at a woven belt outlet of the retractor. The insertion of the clamp into the lock catch can be detected, and simultaneously the extension amount of the woven belt is also detected, accordingly, the situation that the seat belt is correctly used is determined by simultaneously meeting two conditions, so that the accuracy of detection is improved, the phenomenon that the normal use of the seat belt is avoided is avoided, and the factor of safety of drivers and passengers is improved.

The invention discloses a determination method for a rainstorm-induced shallow landslide disaster warning threshold value. The method comprises the steps of first, performing slope unit division basedon a DEM (Digital Elevation Model); then, establishing a stability analysis warning model based on the slope units and a critical infiltration capacity; setting five warning grades, and calculating acritical infiltration capacity threshold value of each of the five warning grades according to a meaning represented by an FS (Factor of Safety) index; and finally, establishing a landslide rainfall-infiltration model based on the slope units, calculating a relation between the infiltration capacity and a rainfall capacity of each slope unit under a specific raining condition, and reversely deducing a critical rainfall capacity of each slope unit through the critical infiltration capacity. According to the determination method for the rainstorm-induced shallow landslide disaster warning threshold value, the slope units and rainstorm influence coefficients are imported into rainstorm-induced shallow landslide mass measurement modeling, thereby improving the work efficiency of landslide warning, improving the spatial precision of landslide warning and providing basic data for researches of landslide control. The method can be applied to landslide disaster warning work in a mountainousarea and provide scientific basis for disaster prevention and reduction of the mountainous area.

The invention discloses a super-large-cross-section tunnel-based surrounding rock classification method. The super-large-cross-section tunnel-based surrounding rock classification method comprises the following steps of (1) obtaining a tunnel excavation section area S; (2) calculating and determining the number of excavation faces according to a formula S/50, and ensuring the excavation faces to be same in area, wherein S is the tunnel excavation section area in the step (1); (3) performing finite element numerical simulation analysis on practical engineering, and performing strength reduction on the excavation faces and expanded regions of the excavation faces to obtain different safety coefficients a1, a2, a3 and a4; (4) determining weight values b1, b2, b3 and b4 according to the reciprocals of the different safety coefficients a1, a2, a3 and a4 in the step (3); (5) performing zoning on the excavation faces on site; (6) calculating [BQ] of zones, and performing weighting according to [BQ] so as to obtain [BQ]A; and (7) finishing excavation face sketches according to an actual situation, and marking [BQ] and [BQ]A of the zones.

The invention discloses an unmanned automatic rust removing and spraying device for an inner wall of a storage tank. The device is arranged in the storage tank and comprises a fixed base and a column.A driving assembly for rotating the column is arranged on the fixed base, a lifting outer frame is arranged on the column, the lifting outer frame is connected to a driving mechanism, and the drivingmechanism is used for driving the lifting outer frame to move up and down along the column. The device also comprises two cantilevers symmetrically arranged on the lifting outer frame, and a spray gun module is arranged on the end part of each cantilever. On a basis that the cantilevers can lift along the column and the column can rotate, the inner wall of the storage tank can be automatically paint-sprayed and sand-sprayed all around through the spray gun modules on the cantilevers. Other constructors are not needed in a working site, so that the construction cost is lowered greatly, the damage of dust to the constructors is reduced, and the incidental factors of safety accidents are reduced.

The invention relates to a method for judging the stability of a goaf roof. The method comprises the following steps: defining the goaf overlaying stability safety factor as the ratio of the actual shear strength-tensile strength ratio of overlaying to the shear strength-tensile strength ratio of critical failure after reduction based on the concept of material strength reserve according to the physical and mechanical properties of rock; reducing the roof overburden cohesion, internal friction angle and tensile strength by use of an FLAC3D finite difference program, and determining the critical failure strength of the roof by adopting the central tension and plasticity zone connection of the goaf roof as a critical failure judging standard; and performing traversal search by a bisection method to obtain a safety factor conforming to the convergence condition to realize quantitative evaluation on whether the goaf roof is stable. The method provided by the invention provides guidance to safe mining of an underground mine and avoids the safety accidents in mine production such as casualties and equipment damage caused by settling and even collapse of unstable goaf roof during underground mining.

The invention provides a drowning rescuing device and a manufacturing method thereof and completely avoids drowning dying accidents in seaside swimming places, tourist attractions and city swimming pools in each year. A screen plate (14) which can be rapidly supported by buoyancy of water is arranged in a water region (B); as a waterproof infrared transmitter (19) which can automatically alarm by a drowning behavior is arranged, and an infrared remote controller (2) on a winding engine (1) on a shoreside (A) drives a cable stranding disc (8) to move, the full-automatic rescuing without the matching of a drowner can be finished, and furthermore, a rescuing worker at the shoreside (A) does not need to go into water and only needs to operate a manual switch (3), so that the security coefficient reaches 100% due to double insurances; a technical scheme is represented by using a new method through forms of an operation manner and a technique process; a brand-new structure which is convenient to manufacture, store in a cabin and transport, install and use is adopted to realize absolutely safe rapid drowning rescuing as soon as possible; and therefore, the drowning rescuing device is a necessary device for various swimming places and water sides.

The invention relates to an earthquake slope stability analysis method considering sliding surface dynamic progressive damage, and belongs to the technical field of slope stability. The method includes: based on the slope sliding surface damage evolution rule under the earthquake effect, obtaining strength parameter characteristics and a dynamic attenuation law of the slope geotechnical material by adopting a mechanical test; constructing a characterization material strength parameter attenuation strain softening model and a fracture surface vibration degradation model; based on a dichotomy strength reduction method and a maximum shear strain increment, determining a critical state sliding surface position under a slope static force state; furthermore, by combining a sliding surface dynamic progressive failure theory and a vector sum method, an earthquake side slope safety factor time-history curve is solved in numerical calculation, the stability state of the side slope under the earthquake action is truly reflected, and the accuracy and reliability of a numerical calculation result are improved.

The invention discloses a safety factor calculation method for seabed slope stability. The safety factor calculation method comprises the steps of acquiring and calculating wave characteristic parameters and seabed soil mass strength parameters of a sea area; establishing a numerical model based on the wave power characteristics and the soil body strength parameters; analyzing the wave field dynamic model and the seabed slope numerical model based on numerical wave generation and a finite element strength reduction method to obtain a slope stability safety coefficient; and acquiring stabilitychange analysis and estimation under a certain slope rate based on different relative positions of waves and slopes. The stability coefficient of the underwater side slope under the wave load can be estimated, and convenience is provided for selection of the construction slope rate of the underwater temporary side slope. The optimized design slope rate is obtained on the basis of different designparameters and calculation working conditions by utilizing the convenience of numerical simulation calculation. When certain safety requirements are met, the earth excavation and backfill amount of the whole foundation trench is reduced, and damage to the seabed natural ecological environment is reduced to a certain extent.

The invention discloses a large-span bridge safety performance real-time monitoring system based on big data. The large-span bridge safety performance real-time monitoring system comprises a detectionarea division module, a bearing pressure detection module, a wind power parameter acquisition module, a deformation displacement monitoring module, a water flow impact parameter detection module, a modeling analysis module, a parameter database, a central server, an early warning module and a display terminal. According to the large-span bridge safety performance real-time monitoring system basedon big data, by integrating the influence factors of bearing pressure, longitudinal wind power, deformation displacement and water flow impact force borne by the bridge, and combining a modeling analysis module to quantify the influence result of the influence factors on the bridge safety performance, the comprehensive safety factor of the bridge is counted, and the health condition of the bridgecan be comprehensively reflected; and by counting and evaluating the comprehensive safety coefficient of the bridge regularly, the related workers can master the safety dynamic development trend of the bridge, the reliable reference bases are provided for the maintenance of the bridge, and the service life of the bridge is prolonged.

The invention relates to a coal mine rock burst pre-controlling method, particularly to a method for actively controlling motion of coal mine critical layers by using strip filling walls. The method comprises the steps of calculating initial fracture steps of the coal mine critical layers by using a mine pressure theoretical model, determining intervals of the strip filling walls through combining experience safety factors, and calculating widths of the filling walls according to coal bed buried depths, rock stratum volume weights and unidirectional compressive strength of filling materials, and performing construction of the strip filling walls. According to the method, danger relieving measures passively adapted to abrupt fractures of critical layers in the prior art are changed into the measure of eliminating preconditions of fracture of coal mine critical layers in advance, so that pre-defense for coal mine rock burst is achieved. According to the method, the coal mining production efficiency can be improved, the work amount of filling construction of coal mine working faces is reduced, filling materials are saved, and the production cost per unit of coal is reduced.

The invention relates to a combined device box for power construction overhead work, and relates to the technical field of power construction. The combined device box for the power construction overhead work comprises a material box, and a material box hanging and fixing mechanism, and is provided with tool hanging rings or hanging sleeves. With the adoption of the technical scheme, the combined device box has the benefits that the combined device box is fixed by double screws, is firm to mount, and does not drop; the safety of workers is protected completely; in a using process, articles such as drift bolts and wire clamps can be placed in the material box; the placing problem of devices and materials of pole and tower workers is solved; a requirement of a safety technique is met; and the combined device box is simple in working, convenient to fix, and high in safety factor, meets specifications of safety regulations, and eliminates potential safety hazards.

This invention has disclosed an intelligent warehousing management method, apparatus, system, an unmanned intelligent warehousing device management method and an unmanned intelligent warehousing device. Wherein the intelligent warehousing management method manages the materials required by products production based on an unmanned intelligent warehousing device with function of connecting to Internet of Things and comprises: an obtaining step, to obtain production plan data of the products and safety factor of the materials; a prediction step, to predict the usage of the materials based on the production plan data and the safety factor; a sending step, to send production data based on the production plan data and the predicted usage to the unmanned intelligent warehousing device; an updating step, to update the production data in real time based on usage of the materials stored in the unmanned intelligent warehousing device; an adjusting step, to adjust usage of the materials utilizing the unmanned intelligent warehousing device based on the updated production data; a calculating step, to calculate the materials needed to be replenished in the unmanned intelligent warehousing device based on the updated production data.

The invention relates to a numerical simulation and limit equilibrium calculation-based landslide hazard assessment method. The assessment method comprises the steps of building a corresponding numerical model by adopting a large deformation numerical simulation method in combination with field survey data and related modeling methods, and determining landslide body form contour lines and key position coordinates of different positions in a landslide path; based on a ring shear or direct shear test, determining residual shear strength of a landslide body-slope surface boundary plane; analyzingand calculating landslide body factors-of-safety of different positions and landslide body forms in the landslide path by utilizing a limit equilibrium method, namely, performing FOS calculation; determining FOS specifications of specification requirements, wherein indexes needed to be considered for determination of the specific FOS include a sliding distance, a landslide speed, the number of people in a hazard range, and a land resource type of a hazard-bearing body; and establishing a landslide hazard degree calculation formula and determining landslide hazard level judgment standards. Themethod is suitable for hazard assessment of all types of soil landslides, and has good application prospects.

The invention discloses an intelligent mine helmet control method based on human body information and environment information fusion. The method includes acquisition of original brain wave signals; preprocessing of original brain waves; wavelet decomposition and reconstruction of the original brain wave signals; extraction of brain wave signal characteristics; optimization of a BP neural network through an artificial fish swarm algorithm to identify fatigue characteristics; identification of miner fatigue, monitoring of miner environmental information and alarm operation for dangerous situations. According to method, the energy of four sub-bands, ApEn approximate entropy, KC complexity and C0 complexity in the high-precision brain wave signals obtained by preprocessing (filtering and denoising) of the original brain wave signals are extracted as an artificial fish swarm algorithm to optimize an input layer of the BP neural network. The artificial fish swarm algorithm is trained to optimize the BP neural network to identify the miner fatigue, and the identification accuracy is high. An intelligent wearable bracelet worn on the wrist of a miner is adopted to give triple alarm of sound, light and vibration on the safety states of different dangerous levels to improve the underground operation safety coefficient.

The invention relates to an electric hanging basket with the high safety factor. The electric hanging basket comprises a main body, two steel wire ropes and two power modules, and further comprises acollecting mechanism and a buffering mechanism; the collecting mechanism comprises a baffle, a collecting tank, a roller, a protective curtain, an elastic rope, two driving assemblies and at least twoconnecting assemblies; each connecting assembly comprises a reinforcing sleeve, a sliding groove, a first spring, a first connecting rod and a sliding block; the buffering mechanism comprises a reinforcing rod, a damping rod, two buffering assemblies, two supporting blocks and two airbags. In the electric hanging basket with the high safety factor, through the collecting mechanism, residue generated in the external wall construction process can be collected, thus the probability that the residue falls and hits pedestrian is decreased, and the safety of the electric hanging basket is improved;and through the buffering mechanism, the impact force of the ground to the main body is reduced when the main body makes contact with the ground, the stability of the main body is improved, and thusthe stability of the electric hanging basket is improved.

The invention discloses a manipulator. The manipulator comprises a base, wherein a first mounting cavity is formed in the base; a first rotating motor is mounted in the first mounting cavity; a firstmotor shaft is mounted at a driving end of the first rotating motor, penetrates through the top wall of the inside of the first mounting cavity and extends to the upper side of the base; a mounting seat is arranged on the upper side of the base; the bottom wall of the mounting seat is fixedly connected with a first motor shaft; a plurality of rollers are symmetrically mounted on the bottom wall ofthe mounting seat; a first fixing arm is arranged on the top wall of the mounting seat; and a first mounting hole is formed in the top end of the first fixing arm. The manipulator is simple in structure and easy to implement; the manipulator is adjusted in various directions through multiple different driving modes; the most suitable driving mode is used for the different positions; the occupiedspace and manufacturing cost are greatly saved; demands of daily production can be met completely; meanwhile, the manipulator is convenient to operate; the factor of safety is high; and the enterprisecompetitiveness is improved.

The invention relates to the field of construction machinery, and discloses an anti-rollover control method and device for construction machinery and the construction machinery. The anti-rollover control method includes the steps that a cantilever crane reference inclined angle value of each cantilever crane of the construction machinery is obtained; a function relationship between a vehicle safety factor and the cantilever crane reference angle values is established, a partial derivative value is obtained by calculating the partial derivative of the vehicle safety factor from the cantilever crane reference inclined angle value of the currently moving cantilever crane, wherein the vehicle safety factor is used for indicating the stability of the vehicle anti-rollover; and it is determinedwhether to limit the movement of the cantilever crane based on the partial derivative value and the change trend of the cantilever crane reference inclined angle value of the currently moving cantilever crane affected by the movement. According to the anti-rollover control method and device for construction machinery and the construction machinery, "the partial derivative value of the vehicle safety factor with respect to the cantilever crane reference inclined angle values" and "change trend of the cantilever crane reference inclined angle values " are combined to be used for rollover judgment, the movement of the cantilever cranes before the movement of any cantilever crane is performed is limited, and significant foresight and universal correctness are achieved.

The invention relates to a distribution equipment operation efficiency evaluation method involving reliability and economy, comprising the steps of: (1) determining upper and lower limits P2 and P1 of an economical operation interval; (2) rearranging distribution equipment time sequence load curves in order of size to obtain a load duration curve; (3) determining the supplied electric quantity S1 exceeding the upper limit P2 of the economical operation interval, the supplied electric quantity S2 in the economical operation interval, and the electric quantity S3 below the lower limit P1 of the economical operation interval; (4) determining the equipment lacked electric quantity S4 and equipment loss electric quantity S5; (5) determining the correction factor alpha of the GDP generated by each kilowatt-hour according to the GDP of the area where equipment is located, social electricity consumption per year and average retail price; and (6) determining equipment operation efficiency according to an equipment operation efficiency evaluation model. The method involves the factors of safety, reliability, economic operation, utilization rate and duration, and can more comprehensively evaluate the operation efficiency of distribution equipment in a full time domain.

The invention relates to an intelligent communication iron tower with a high safety factor and a protection function. The communication iron tower includes a tower body, a platform, a lightning rod, four communication mechanisms, four protection mechanisms and a plurality of tower feet. Each communication mechanism includes an antenna, a ring, an arc plate, two fixed assemblies and a plurality ofdriving assemblies correspondingly; each driving assembly includes a first motor and a gear; each fixed assembly includes a direction adjusting unit, an air cylinder, an air pump and a piston; and each protection mechanism includes a hinge joint assembly, a protection plate, an overturning assembly and a fixed assembly, wherein the transition assembly includes a second motor, a second driving shaft, a wire coil and a stay wire. According to the intelligent communication iron tower with the high safety factor and the protection function, arc plates are rotated at a proper angle by the communication mechanisms, the phenomenon that wind blows to the antenna is prevented, the condition that workers fall down during the construction is prevented, the safe construction of the workers is guaranteed and the safety factor and practicability of equipment are improved.

The invention discloses a quick well wall and wall back nondestructive detecting system based on a transient electromagnetic method and a detection method of the detection system, in particular to a detecting system, and a detecting method and a construction process which are matched with the detecting system. The detecting system and the detecting method aim at detecting common defects such as well wall fractures, wall internal cavities, wall thickness issues and wall back holes in the shaft construction or use process, providing bases for subsequent improving schemes or remedial measures, and preventing hazards. Compared with the two common detecting technologies of a ground penetrating radar method and an ultrasonic method, the detecting system and the detecting method are remarkable in benefit and have the advantages that non-contact type measurement is achieved, and construction is easy, convenient and flexible; a three-component receiving probe is adopted, and the space resolving power of detection is ensured; fast scanning type detection can be achieved through a tackle gear and wireless communication; a non-metal structure and wall-attaching type arrangement are adopted, peripheral interference sources can be effectively distanced or avoided, and thus the signal to noise ratio can be increased; the dustproof and waterproof design is adopted for instrument equipment, and thus the continuous and stable work under harsh conditions can be ensured; the shaft construction condition is taken into consideration, and the safety factor is high.