797results about How to "Improve crash performance" patented technology

The invention relates to the technical field of radio fix radars, in particular to a millimetre wave time-division linear frequency modulation multi-object detection automobile anti-collision radar. The radar of the invention adopts full phase parameter receiving/emitting benchmark signal and time-division and time-sequence asynchronous control to receive/emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing combined with the vehicle speed and GPS data MCU to control time-division n-passage modulation frequency and waveform millimetre wave linear locking phase frequency modulation; emission is carried out sequentially by R/T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R/T1, low noise high amplifier, subharmonic mixing, middle amplifier and a time-dividing circuit and multi-object signal corresponding matching filter wave and is processed and controlled by MCU at DSP; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognised; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data, thus obviously improving the driving safety of the vehicle.

This high-strength steel sheet includes: in terms of percent by mass, 0.03 to 0.10% of C; 0.01 to 1.5% of Si; 1.0 to 2.5% of Mn; 0.1% or less of P; 0.02% or less of S; 0.01 to 1.2% of Al; 0.06 to 0.15% of Ti; and 0.01% or less of N; and contains as the balance, iron and inevitable impurities, wherein a tensile strength is in a range of 590 MPa or more, and a ratio between the tensile strength and a yield strength is in a range of 0.80 or more, a microstructure includes bainite at an area ratio of 40% or more and the balance being either one or both of ferrite and martensite, a density of Ti(C,N) precipitates having sizes of 10 nm or smaller is in a range of 10¹⁰ precipitates/mm³ or more, and a ratio (Hvs/Hvc) of a hardness (Hvs) at a depth of 10 μm from a surface to a hardness (Hvc) at a center of a sheet thickness is in a range of 0.85 or more.

A method of identifying a plurality of RFID tags in an RFID reader includes generating a Query command to transmit the Query command to an RFID tag in a ready state, receiving an error detection code from the RFID tag that received the Query command, generating an acknowledgement (ACK) command to transmit the acknowledgement (ACK) command to the RFID tag that transmitted the error detection code when the error detection code is received without a collision, and receiving tag information including a protocol control (PC) and an electronic product code (EPC) of the RFID tag that transmitted the error detection code. It is possible to improve tag identification speed using an error detection code, such as a cyclic redundancy check (CRC)-16 code, which has uniformly-random characteristics like random number with 16 bits (RN 16), instead of RN 16 used in a conventional EPCglobal Class1 Generation2 standard.

The invention relates to the technical field of radio fix, in particular to a millimetre wave time-division random code phase modulation multi-passage automobile anti-collision radar. The radar of the invention is provided with a time-division and time-sequence asynchronous control to receive/emit signal, and a receive/emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing, the vehicle speed sensing and satellite positioning GPS data MCU control time-division n-passage random code millimetre wave phase modulation; emission is carried out sequentially by upper frequency conversion, R/T3, frequency doubling and power amplification, R/T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R/T1, low noise high amplifier, subharmonic mixing, middle amplifier and extracts the multi-passage signal DSP which is processed and controlled by MCU; the driving of multi-automobile of adjacent lanes is not disturbed by each other and can be completed simultaneously; the high-performance environment electromagnetic compatible EMC is provided; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional panoramic images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognized; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data.

A bumper beam is formed from a tailor welded blank with thinner gage sheet metal laser welded to thicker gage sheet metal at opposing sides thereof. The tailor welded blank is then formed into a bumper beam having a uniform B-shaped cross-sectional configuration from one terminal end to the other. The heavier gage material in the tailor welded blank corresponds to the terminal ends of the bumper beam where the bumper beam is affixed to the lower frame rails of the vehicle chassis thus placing the greater energy absorption qualities for the bumper beam only at the locations in which they are needed without requiring reinforcement inserts.

A vehicle cabin assembly comprises upper side beams, main longitudinal beams, a front auxiliary frame, auxiliary frame connecting plates and front modules, the upper surface of the upper side beam is provided with mounting supports which are provided with front module mounting points, fender mounting points and engine hood mounting points; the front modules are fixed to the front ends of the main longitudinal beams, and each front module is connected to the front module mounting point of the corresponding upper side beam through a front module connecting plate; the auxiliary frame connecting plates are connected respectively with the front auxiliary frame, the main longitudinal beams and the upper side beams; the main longitudinal beams, the upper side beams, the auxiliary frame connecting plates, the front auxiliary frame, the front module connecting plates and the front modules are connected to form an integrated frame structure. Through integral arrangement of a cabin, it is possible to provide multiple transmission paths of impact force for various parts of the cabin, increasing energy absorption ratio and optimizing crash performance of the vehicle.

The invention provides a fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements. The method comprises the following six steps: at a collision detection stage, detecting collision information of fluid particles with a finite element network; at an agent particle generation stage, generating collision agent particles presenting a finite element model according to the collision information for processing the collision between a fluid and a solid; at a coupling force calculation stage, calculating force generated by collision between agent particles and fluid particles according to the position and speed relations of the agent particles and the fluid particles; at a coupling force allocation stage, controlling the position relation of the agent particles and the finite element model and allocating the coupling force to a finite element stress model; at a position and speed updating stage, driving the position and speed update of the finite element model and a fluid particle model according to the calculated coupling force; at a non-penetration modification stage, modifying penetration fluid particles according to an updated position.

The invention relates to the radio-positioning technical field, particularly a millimeter-wave time-division passive frequency modulation multi-channel automotive anti-collision radar, which is realized through the following steps: adopting the full-phase parameters to receive/transmit reference signals; asynchronously controlling the time division and the time sequence; watching the targets which are prone to collision on the w surface in an omni-directional manner through DSP cyclic scanning wave beams by a quasi-optical dielectric lens antenna circular array; controlling the time division SAW multi-channel passive frequency modulation through road condition cameras, an own vehicle speed, a GPS signal MCU; sending to antenna array to transmit through an up-converter, an amplitude limiter, T/R3, a frequency multiplier and a power amplifier, T/R2, an isolator and a wave beam switch; filtering the returning wave in a conjugating and matching manner with the transmitting SAW through the antenna array, the wave beam switch, the isolator, R/T1, the low-noise high amplifier, a down-converter, a medium amplifier, the time-division circuit and the SAW multi-channel signals; processing and controlling DSP and MCU; controlling the false-alarm when encountering a plurality of road barrier targets DSP and confirming the position, the distance and the relative speed; displaying the three-dimensional image on a CRT, wherein the closer the vehicle gets to the target, the higher the resolution power is; identifying the nearest distance to the vehicle; giving an alarm when the distance is smaller than the safety distance; and intelligently avoiding the barriers or reducing or braking if the distance is close to a risk distance, wherein the control is determined based on the actual condition of the road surface environment combined with the own vehicle speed and the GPS data, thereby improving the travelling safety.

The invention provides an anti-collision protecting base of an electric pole. The anti-collision protecting base comprises two semi-cylindrical outer shells which can form a cylinder and two semi-cylindrical inner shells which are arranged in the outer shells, are used for inserting electric poles and can form a cylinder, wherein a plurality of external reinforcing ribs are uniformly distributed on the inner walls of the outer shells; a plurality of internal reinforcing ribs corresponding to the external reinforcing ribs are arranged on the inner shells; a plurality of anti-collision springs are horizontally connected between the corresponding external reinforcing ribs and internal reinforcing ribs. The anti-collision protecting base has the advantages of scientific design, good anti-collision property and simple structure.

A bumper beam is formed from a tailor welded blank with thinner gage sheet metal laser welded to thicker gage sheet metal at opposing sides thereof. The tailor welded blank is then formed into a bumper beam having a uniform B-shaped cross-sectional configuration from one terminal end to the other. Each fore-and-aft extending wall of each cell of the B-shaped cross-sectional configuration is formed with first and second hinges at a bend line between substantially horizontal portions of the wall and an intermediate transitional portion such that the horizontal portions are at different vertically spaced positions. Upon receipt of an impact, the first hinges bend into the corresponding cell while the second hinges bend outwardly. The second hinges on the corresponding inner walls of the two cells contacting upon deep collapse to enhance energy absorption.

The invention relates to the technical field of radio positioning, in particular to a millimeter-wave random biphase code phase-modulation and amplitude-modulation automotive collision-proof radar. Aquasi-optical integrated dielectric lens antenna and an array are arranged; a DSP scans wave beams lane by lane to guard against a target possible collided on a road surface; a broadband noise sourcegenerates two random code generators, a random code generator A modulates phase and measures distance/speed, and a random code generator B modulates amplitude, and performs transmitting/receiving conversion and back edge detection; double random code radio frequency is transmitted through an upconverter, an R/T3, a frequency multiplier and power amplifier, an R/T2, an isolator and an antenna; andback waves are transmitted to the DSP and an MCU for processing control through the antenna array, a beam switch, an isolator, an R/T1, a high frequency amplifier, a downconverter, an intermediate frequency amplifier, a random sequence asynchronous gate, a digital intermediate frequency quadrature detector I/Q and a digital pulse compression correlator. The radar ensures traffic flows in adjacentlanes run densely without mutual interference and operate in a coexisting way, has high electromagnetic compatibility EMC, inhibits false-alarm and determines the position, distance and relative speedof a target through the DSP, displays three-dimensional images and identifies a target closest to the automobile through a CRT, performs the audible and visual alarm if the distance of the target issmaller than a safety distance, intelligently avoids a barrier or reduces speed or brakes if the distance of the target is approximate to a danger distance, and controls and references a road condition to combine the speed of the automobile and the current position information on a GPS to make a choice, thereby obviously improving the running safety of the automobile.

The invention discloses a ship unberthing and berthing device. The ship unberthing and berthing device is used for solving the problems that an existing anti-collision damping device on a wharf is poor in buffering effect, single in function and small in application range, and comprises at least two hydraulic cylinders and an operating center. Each hydraulic cylinder comprises a cylinder body and a piston rod, the tails of the cylinder bodies are hinged to a wharf, the cylinder bodies can rotate in vertical planes, the ends of the piston ends are used for pushing ships, the height of the ends of the piston rods is smaller than or equal to that of the tails of the cylinder bodies, and hoists for driving the cylinder bodies to rotate are arranged on the wharf and controlled through the operating center. According to the ship unberthing and berthing device, corrosion resistance and damping generated during berthing of ships are completed through contracting of the piston rods of the hydraulic cylinders, ships are pushed away from the wharf through stretching of the piston rods, the double functions are achieved, and the corrosion resistance and the damping performance are obviously improved compared with existing devices such as scrapped tires; due to the rotatable cylinder bodies, the ends of the piston rods are variable in height to adapt to unberthing and berthing of ships with different tonnages and different ship side heights.

A front end module for a vehicle includes a first box-type mounting part and a second box-type mounting part. The first box-type mounting part is disposed on a connection portion of a front end module lower member with a front side member. The second box-type mounting part is disposed on a front end portion of the front side member. The first and second box-type mounting parts are coupled to each other by bolt coupling or welding such that sections thereof are connected to each other upon assembling of the front end module and the front side member.

The invention discloses a machining method for a hot stamping part based on the self-resistance heating performance gradient. The machining method comprises the steps that the hot stamping part is divided into a collision energy absorption area and a high-intensity area; a plate blank is cut into the corresponding shape, placed between electrodes on the two sides of a large-power power source and fastened through ejection air cylinders; the plate blank in the collision energy absorption area is subjected to short circuit operation through short circuit blocks, a low-temperature area is formed, and the corresponding high-intensity area is a high-temperature area; the high-temperature area is fully austenitized through the large-power power source, the temperature of the low-temperature area is maintained stable under the action of the short circuit blocks, and a plate blank with the temperature gradient is formed; and the ejection air cylinders release pressure finally, so that the hot stamping part with the gradient performance is obtained after stamping and quenching in a die are conducted. The machining method for the hot stamping part based on the self-resistance heating performance gradient has the advantages of being high in heating efficiency, low in energy consumption, capable of reducing blank oxidation and the like; the die design difficulty is lowered, and industrialization is easy; and the comprehensive collision performance of the hot forming part is improved on the premise that the intensity is ensured.

The invention belongs to the technical field of materials, and relates to a quick nano-copper particle preparation method. The method includes the following steps: (1) preparing ethanol water; (2) dissolving a reducing agent into the ethanol water to prepare a reducing agent solution; (3) with stirring, dissolving copper salt and a dispersing agent into the ethanol water in the step (1) to prepare a copper salt and dispersing agent solution; (4) heating the reducing agent solution to 25-28 DEG C, and under the conditions of stirring and ultrasonic wave, dropwise adding the copper salt and dispersing agent solution into the reducing agent solution heated to the temperature of 25-28 DEG C; (5) heating to the temperature of 25-28 DEG C, and reacting for 2-4h; (6) filtering and separating solid-phase precipitation, putting the solid-phase precipitation into a centrifuge for centrifugation, and drying and removing moisture in vacuum to obtain nano-copper particles with the surface coated with the dispersing agent. By the method, reaction time is saved, yield is increased, the prepared nano-copper particles can be used as additives to be applied to reusable lubricating oil with antifriction and self-repairing effect.

The invention discloses an anti-collision structure of a submerged floating tunnel. The anti-collision structure of the submerged floating tunnel is characterized in that the anti-collision structure is composed of anti-collision energy dissipation casing pipes covering the outer wall of the floating tunnel, anti-collision pipe sections capable of being disassembled and assembled independently are arranged on the axial section of the anti-collision energy dissipation casing pipes, the anti-collision pipe sections are pipe pieces arranged on the outer wall of the floating tunnel in the periphery direction in a sectioned mode, all the pipe pieces are fixedly connected to the outer wall of the floating tunnel through high-strength bolts, and the axial direction is the passage direction of the submerged floating tunnel. All the pipe pieces are in a multi-layer composite structure which comprises a polyurethane elastic panel located on the surface and an energy dissipation cushion layer located in the inner layer, a closed pressure-bearing water cavity is formed between the polyurethane elastic panel and the energy dissipation cushion layer, and the pressure-bearing water cavity is filled with pressure-bearing water. The anti-collision structure is applied to the submerged floating tunnel, is large in elasticity, resistant to corrosion and capable of bearing collision of large-tonnage ships and sufficiently absorbing impact energy.

The invention relates to a bridge pier protective device comprising at least one anti-collision structure and connection structures used for connecting the adjacent anti-collision structures or the anti-collision structure and a bridge pier. Each anti-collision structure comprises an outer layer collision bearing structure, a middle energy-absorbing supporting structure and an inner layer protective structure, wherein the middle energy-absorbing supporting structure is a negative poisson ratio structure formed in the manner that multiple layers of energy absorbing units are arranged in an intersecting manner according to a certain law, each energy-absorbing unit is in an inwards concave hexagon and comprises a group of opposite side plates and a group of inwards concave folded plates opposite to each other, and the included angle between each side plate and the corresponding inwards concave folded plate is smaller than 90 degrees. The anti-collision structure has the negative poisson ratio feature, the energy dissipation time is effectively prolonged, the deformation degree of the energy absorption material is effectively improved, the protective function of the anti-collision device on the bridge pier and other aquatic buildings is greatly improved, and the structure stability is also improved. The structure of the energy-absorbing units is periodically arranged, so that the structure is simple, the production technology is simple, and the product quality is easy to control; and in this way, the anti-collision effect can be improved, and the manufacturing cost is reduced.

The invention provides an elastic longitudinal beam and an automobile provided with the same and belongs to the technical field of automobiles. The problem that the length of the existing longitudinal beam of the automobile can not be changed along with the change of the automobile speed is solved. The elastic longitudinal beam comprises an outer longitudinal beam and an inner longitudinal beam, wherein the outer longitudinal beam is fixedly connected to an automobile body; the inner longitudinal beam is connected with the outer longitudinal beam; a driving mechanism and a locking mechanism are arranged between the inner longitudinal beam and the outer longitudinal beam; the driving mechanism can cause the inner longitudinal beam to longitudinally slide along the outer longitudinal beam; the locking mechanism can cause the inner longitudinal beam to be fixed relative to the outer longitudinal beam; and the automobile body is also provided with a control circuit respectively connected with the driving mechanism and the locking mechanism. The automobile provided with the elastic longitudinal beam comprises elastic longitudinal beams arranged on two sides of the automobile body, the front end of the inner longitudinal beam is provided with an anticollision beam, and an energy adsorption box is arranged between the anticollision beam and the automobile body. The anticollision capability of the automobile at a high driving speed can be improved, and the throughput capacity of the automobile during driving at a low speed can be improved.

The invention relates to a modified polypropylene soft bottle material, as well as a preparation method and applications thereof. The preparation method of the modified polypropylene soft bottle material comprises the following steps: (1) mixing ethylene-propylene type propenyl thermoplastic elastomer or styrenic thermoplastic elastomer with polypropylene random copolymer, phenols antioxidant and phosphite ester antioxidant, then pelletizing underwater through an extruder, to obtain granular elastomer master batch; and (2) conducting dry blending to the polypropylene random copolymer and the elastomer master batch to obtain the modified polypropylene soft bottle material, wherein the amount of the polypropylene random copolymer adopted in the step (2) is greater than that of the polypropylene random copolymer adopted in the step (1). The obtained modified polypropylene soft bottle material has excellent physical performance and safety performance in contact with liquor, and can meet the blowing-filling-sealing technological requirements in preparation of soft bottles (bags), and the obtained polypropylene soft bottle (bag) is soft, good in self-sealing effect, has high qualification rate of 99% in the emptying test, high safety and high anti-impact strength.

The invention provides an automobile frame. The automobile frame comprises two longitudinal beams, a plurality of beams, a front anti-collision beam, a spare wheel beam and front transition section reinforcing boards, wherein the beams are connected between the longitudinal beams at the two sides and are partitioned in sequence in the direction from the front ends to rear ends of the longitudinalbeams, the front anti-collision beam is connected between the front ends of the two longitudinal beams, the spare wheel beam is close to the tail ends of the longitudinal beams and connected between the two longitudinal beams at the two sides, and the front transition reinforcing boards are arranged at front transition sections arranged in the longitudinal beams and extend in the length directionsof the longitudinal beams. The automobile frame has the advantages that on the basis that the front anti-collision beam is arranged at the front ends of the longitudinal beams, by arranging the fronttransition section reinforcing board in the front transition sections of the longitudinal beams, the collision performance of the front of the automobile frame can be improved.

The invention discloses a single-buckle golden bracelet comprising a circular bracelet body which is coiled by a thin golden sheet and provided with a single opening. The bracelet body is provided with an outward protrusion. Both ends of the opening of the bracelet body are respectively provided with a first connecting piece and a second connecting piece. The second connecting piece is inserted in the first connecting piece, and then the bracelet body is fixedly connected into a circular ring. Both ends of the opening of the bracelet body are also provided with a latch for avoiding the disengagement of the first connecting piece and the second connecting piece. The two side edges of the bracelet body are respectively provided with a folding edge for enhancing the strength of the bracelet body. The invention has the advantages of simple structure, small thickness, good strength and difficult deformation.

The invention provides a vertical flow wet-type electric precipitator and wet electric precipitation method. The vertical flow wet-type electric precipitator comprises an annular plate, a spray humidifying layer, a flue gas uniform distribution device, a dust removing electric field area, washing and spraying layers, a plurality of insulator boxes, an atomization water tank and a process water tank, wherein the spray humidifying layer comprises a fine atomizing nozzle and a spray pipeline; flue gas sequentially passes through the annular plate, the spray humidifying layer and the flue gas uniform distribution device; the dust removing electric field area is used for blocking a baffle board of a flue gas blind area; the washing and spraying layers are arranged above the dust removing electric field area; the wet electric precipitation method comprises the following steps: a continuous manner is adopted to conduct atomization and humidification on inlet flue gas and conduct uniformly distributed optimization treatment on the flue gas; an intermittent or continuous manner is adopted to conduct sprinkling and cleaning on a dust-collecting electrode and a discharge electrode; a method of hot air sweeping is adopted to ensure insulation. The vertical flow wet-type electric precipitator and the wet electric precipitation method can effectively ensure the high-efficient and stable operation of the vertical flow wet-type electric precipitator, optimize the fluid field, and strengthen turbulence and atomization of the flue gas; local micro-mixing, and collision as well as crash coagulation of fine particles are promoted; the dust removal efficiency is improved.