雷达波跌倒监测仪（1）

Graphene/basalt fiber multi-scale material as well as preparation method and application thereof

The invention discloses a graphene/basalt fiber multi-scale material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) reacting graphene oxide with an amino silane coupling agent in the presence of a solvent to obtain aminated graphene oxide; sequentially carrying out degumming and roughening treatment on the basalt fibers to obtain pretreated basalt fibers; and (2) dispersing the aminated graphene oxide obtained in the step (1) in an organic solvent to obtain a dispersion liquid, dipping the pretreated basalt fiber in the dispersion liquid, filtering, cleaning, and drying under a hydrogen condition to obtain the graphene/basalt fiber multi-scale material. According to the graphene/basalt fiber multi-scale material prepared through the method, the surface of the fiber is uniformly and firmly modified with graphene, the oxygen content of the surface-modified graphene is low, and the graphene/basalt fiber multi-scale material can ...

Method for connecting transparent spinel and transparent sapphire ceramic by adopting double-layer glass solder

The invention discloses a method for connecting transparent spinel and transparent sapphire ceramic through double-layer glass solder, and belongs to the technical field of welding. According to the method, the dissimilar ceramics are connected step by step through the double-layer glass solder, the interface reaction is inhibited, and therefore the connector with high strength and high light transmittance is obtained. The method specifically comprises the following steps: preparing two types of glass solder powder into slurry, and uniformly coating the surfaces of transparent spinel ceramic and transparent sapphire ceramic with the slurry respectively; placing the sapphire coated with the glass slurry and the spinel coated with the glass slurry in a muffle furnace for first-step connection; and assembling according to a sapphire/glass layer/spinel sequence, applying a certain pressure, and placing in a muffle furnace for second-step connection. The double-layer glass solder prepared through ...

Training method of automatic driving model, vehicle control method, device and equipment

The embodiment of the invention provides an automatic driving model training method, a vehicle control method, a device and equipment, and the method comprises the steps: obtaining N types of sample data, each type of sample data comprises a sample driving parameter and a sample part parameter, the sample part is a part in a first automatic driving vehicle, and N is an integer greater than 1; training each kind of sample data to obtain N automatic driving sub-models; according to the N automatic driving sub-models, an automatic driving model corresponding to the first automatic driving vehicle is obtained, and the automatic driving model is used for determining component parameters of the first automatic driving vehicle. And the control precision of the automatic driving vehicle is improved.

Nickel-plated expanded graphite-Cu composite material and preparation method and application thereof

The invention discloses a nickel-plated expanded graphite-Cu composite material and a preparation method and application thereof, and the preparation method for nickel-plated expanded graphite comprises the following steps: (1) carrying out oxidation intercalation treatment on crystalline flake graphite, and then carrying out high-temperature treatment to obtain expanded graphite; (2) expanded graphite is subjected to autocatalytic plating pretreatment, the expanded graphite subjected to autocatalytic plating pretreatment is placed in a plating solution, and nickel-plated expanded graphite is obtained after an autocatalytic reaction; and (3) uniformly mixing the nickel-plated expanded graphite with copper powder, then carrying out cold press molding to obtain a blank body, and sintering the blank body to obtain the nickel-plated expanded graphite-Cu composite material. The nickel-plated expanded graphite-Cu composite material with the interlocking structure is prepared by controlling the ...

Automatic parking path planning method and device, medium and equipment

The invention discloses an automatic parking path planning method and device, a medium and equipment, and belongs to the technical field of automatic driving. The method mainly comprises the following steps: extracting perception information, sensed by a vehicle, in a predetermined parking space including a target parking space, and identifying a ground marking line according to the perception information; virtualizing the ground marking line to obtain a virtual ground marking line, and obtaining a virtual parking space boundary of the target parking space by using the virtual ground marking line; the vehicle contour of the vehicle needing to be parked is extracted, and the vehicle contour is shrunk to obtain the virtual vehicle contour of the vehicle needing to be parked; and virtual collision detection is carried out by using the virtual parking space boundary and the virtual vehicle contour, and parking trajectory planning is carried out on the vehicle needing to be parked according ...

Automatic driving speed planning method and device and medium

The invention discloses an automatic driving speed planning method and device and a storage medium, and belongs to the technical field of automatic driving vehicle control. The method mainly comprises the steps that real-time detection is conducted on a to-be-processed obstacle inserted from the side of the vehicle driving direction, and the current position and the current speed of the to-be-processed obstacle are obtained; decomposing the current speed of the to-be-processed obstacle to obtain a longitudinal speed component which is the same as the vehicle driving direction; calculating the position of an interference point and the expected speed of the vehicle at the interference point according to the path of the vehicle, the current position of the to-be-processed obstacle, the longitudinal speed component and a preset basic vehicle distance; calculating the expected acceleration of the vehicle according to the current position and the current speed of the vehicle, the position of ...

Preset pressure type passive standby shutdown system

The invention belongs to the technical field of nuclear reactors, and particularly relates to a preset pressure type passive standby shutdown system. The system comprises a soluble neutron absorption poison pressurizing chamber and a sealing plug, the soluble neutron absorption poison pressurizing chamber is located at the reactor top of the reactor core in the pressure vessel, soluble neutron absorption poison is contained in the soluble neutron absorption poison pressurizing chamber, a through hole is formed in the lower part of the soluble neutron absorption poison pressurizing chamber, and the interior of the through hole is connected with the reactor core through a sealing plug. The system is simple in configuration and does not depend on a pump, and equipment arrangement has small space requirements.

Copper-based composite material based on carbon nanotubes as well as preparation method and application of copper-based composite material

The invention relates to a copper-based composite material based on a carbon nano tube as well as a preparation method and application of the copper-based composite material, and belongs to the technical field of copper-based composite materials. The preparation method comprises the following steps: stirring and mixing an aqueous solution of copper powder and a dispersion liquid of carbon nanotubes, standing, layering, stirring, standing, carrying out solid-liquid separation, and mixing in a planetary ball mill to obtain the CNT/Cu composite powder. And after the CNT/Cu composite powder is subjected to cold press molding and hot pressed sintering treatment, the copper-based composite material based on the carbon nanotubes is obtained. According to the invention, the problem of poor wettability of a carbon nanotube and a copper interface is effectively improved; the method has a wide application prospect in the field of friction materials requiring high friction stability and high wear resistance ...

Automatic parking speed planning method and device and medium

The invention discloses an automatic parking speed planning method and device and a storage medium, and belongs to the field of automatic driving vehicle control. The method mainly comprises the following steps: detecting a to-be-processed obstacle on a vehicle parking path, and obtaining the position, contour and speed of the to-be-processed obstacle; decomposing the current speed of the vehicle to obtain a longitudinal speed component; calculating the position of an interference point and the expected speed of the vehicle at the interference point according to the path and the contour of the vehicle, the current position and the contour of the to-be-processed obstacle, the longitudinal speed component and the basic vehicle distance; calculating the expected acceleration of the vehicle according to the current position and the current speed of the vehicle, the position of the interference point, the expected speed and the planned speed; and performing speed planning on the vehicle according ...

Automatic parking path planning function optimization method and device, medium and equipment

The invention discloses an automatic parking path planning function optimization method and device, a medium and equipment, and belongs to the technical field of automatic driving. The method mainly comprises the following steps: constructing an automatic parking path planning function by utilizing a plurality of automatic parking scenes; utilizing the automatic parking path planning function and a plurality of automatic parking track truth values corresponding to the plurality of automatic parking scenes one by one to construct a similarity function between the automatic parking planning track calculated by the automatic parking path planning function and the corresponding automatic parking track truth values; automatically adjusting the plurality of parameters until the similarity function takes the maximum value, and taking the values of the plurality of parameters as the optimal values of the plurality of parameters when the similarity function takes the maximum value; and taking the ...

Growth method of strain-induced oriented silicon steel Gaussian grains

The invention discloses a strain-induced oriented silicon steel Gaussian grain growth method, and belongs to the technical field of oriented silicon steel production. The invention discloses a strain-induced oriented silicon steel Gaussian grain growth method. The method comprises the steps of smelting and casting, rough rolling, hot rolling, normalizing annealing, cold rolling, decarburizing annealing, critical deformation, high-temperature annealing, flat stretching and magnetic domain refining. A critical deformation process is added after decarburization annealing, and the reduction rate is 1.0%-5.5%. A critical deformation area is formed in the plate after critical deformation, sub-grains are formed in Goss grains in the area, the sub-grains take low distortion energy as driving force during high-temperature annealing, the grain boundary migration rate is increased, the stability of abnormal growth of the Goss grains is improved, and the rejection rate of oriented silicon steel products ...

Automatic driving speed planning method and device based on front target and medium

The invention discloses an automatic driving speed planning method and device based on a front target and a storage medium, and belongs to the field of automatic driving vehicle control. The method mainly comprises the steps that at least one sensing device is used for monitoring a to-be-processed obstacle in front of a running vehicle in real time, and the current position and the current speed of the to-be-processed obstacle are obtained; calculating the position of an interference point and the expected speed of the vehicle at the interference point according to the current speed and the current position of the vehicle, the current position and the current speed of the to-be-processed obstacle and a preset basic vehicle distance; calculating the expected acceleration of the vehicle according to the current position and the current speed of the vehicle, the position of the interference point and the expected speed; and performing speed planning on the vehicle according to the current ...

Method for electrochemically preparing graphene

The invention discloses a method for electrochemically preparing graphene, which comprises the following steps: (1) placing a graphite foil in a sodium hydroxide solution for primary dipping treatment, then taking out the graphite foil, and placing the graphite foil in an ammonium chloride solution for secondary dipping treatment to obtain a pre-intercalated graphite foil; and (2) inserting the graphite foil subjected to pre-intercalation treatment into the electrolyte at intervals as a cathode and an anode respectively, introducing bipolar pulse voltage between the cathode and the anode, stripping the graphite foil, and carrying out ultrasonic cleaning, filtering and vacuum drying on the obtained graphene suspension to obtain the graphene. The electrochemical method for preparing graphene does not need an oxidizing agent or a reducing agent, the preparation process is safe, operation is easy and convenient, and consumed time is short; besides, through pre-intercalation treatment of the ...

Test method, device and equipment for autonomous vehicle

The embodiment of the invention provides a testing method, device and equipment for an automatic driving vehicle. The method comprises the following steps: controlling a vehicle-mounted computer system to send a drive-by-wire instruction to a drive-by-wire system, and enabling the drive-by-wire system to control an automatic driving vehicle to perform first test operation according to the drive-by-wire instruction; acquiring first operation data of the automatic driving vehicle in first test operation, and determining a test result of the drive-by-wire system according to the first operation data and the drive-by-wire instruction; when the automatic driving vehicle is located in the preset scene, controlling the vehicle-mounted computer system to send test data to the control system, and enabling the control system and the drive-by-wire system to control the automatic driving vehicle to perform second test operation; acquiring second operation data of the automatic driving vehicle in second ...

Engineering crushing method for reducing crushing vibration

The invention discloses an engineering crushing method for reducing crushing vibration, which comprises the following steps: carrying out area limitation by taking a blasting point as a center, implementing different blasting modes in different areas, and mainly dividing the area into three parts: a first-stage area: taking the blasting point as the center and having a radius of 25m, and a second-stage area: taking the blasting point as the center and having a radius of 25m; in the second-level area, the blasting point serves as the center, and the radius ranges from 25 m to 50 m; in the third area, the blasting point serves as the center, and the radius ranges from 50 m to 100 m. Three layers of blasting areas are arranged, and different buffering schemes are arranged in each layer of blasting area; vibration reduction holes are formed in the first-stage area and can reduce the blasting vibration influence on surrounding protected objects, obstacles are arranged on the propagation path ...

Fermentation device and method for processing rhizoma polygonati sauce

The fermentation device comprises a tank body, a discharging opening is formed in the bottom end of the tank body, a top cover is installed at the top end of the tank body, a feeding opening is formed in the top cover, and multiple groups of circular grooves are formed in the bottom end of the top cover; the fermentation device for processing the polygonatum sibiricum sauce further comprises a collecting assembly, the collecting assembly comprises a winding drum arranged in the tank body and rotationally connected with the tank body, and the problems that in the original stirring process, dry solids are prone to being wrapped by water, caking is caused, raw materials are further mixed insufficiently, and the stirring effect is poor are solved. And the quality of the prepared rhizoma polygonati sauce is reduced.

Copper-based composite material based on carbon fiber/graphene oxide as well as preparation method and application of copper-based composite material

The invention relates to a carbon fiber/graphene oxide-based copper-based composite material and a preparation method and application thereof, and belongs to the technical field of composite material preparation. The carbon fiber/graphene oxide-based copper-based composite material provided by the invention is prepared from short carbon fibers, graphene oxide and copper powder through hot pressed sintering after molding; wherein the length of the short carbon fiber is 1 mm to 2 mm; the carbon fiber/graphene oxide reinforcement is obtained by performing amination treatment on graphene oxide by using a silane coupling agent and then performing bonding reaction on silicon hydroxyl generated by hydrolyzing a methyl silicon oxygen end group of the aminated graphene oxide and a hydroxyl functional group on the surface of the carbon fiber. According to the copper-based composite material based on the carbon fiber/graphene oxide, the bonding strength of the carbon fiber and a copper matrix can ...

PDMS (Polydimethylsiloxane) packaging enhanced graphene electromagnetic shielding film and preparation method thereof

The invention discloses a PDMS packaging enhanced graphene electromagnetic shielding film and a preparation method thereof. The preparation method comprises the following steps: firstly, synthesizing a graphene oxide material; secondly, preparing the graphene oxide film by a vacuum filtration method; then, the obtained graphene oxide film is soaked in a hydroiodic acid aqueous solution for reduction to obtain a hydroiodic acid reduced graphene film, and then the graphene film is put into a drying oven for high-temperature heating, so that iodine-containing residues in the graphene film are heated to volatilize, and the situation that the PDMS solution cannot be crosslinked when being heated and cured on the graphene film is prevented. And finally, after residues in the graphene film are volatilized at high temperature, dispensing a PDMS solution on the film, and heating and curing to obtain the PDMS-packaged graphene electromagnetic shielding film. The mechanical property of the graphene ...

Automatic parking path planning method and device, medium and equipment

The invention discloses an automatic parking path planning method and device, a medium and equipment, and belongs to the technical field of automatic driving. The method mainly comprises the following steps: extracting perception information in a predetermined parking space including a target parking space perceived by a vehicle; identifying a ground side line, a road side line and an actual obstacle contour line of the target parking space according to the sensing information; the ground side lines and the road side lines intersecting with the ground side lines are cut, and the ground side lines and the road side lines left after cutting serve as the corresponding boundaries of the available parking space of the target parking space; and performing collision detection by using the corresponding boundary of the available parking space and the actual obstacle contour line, and performing vehicle trajectory planning according to a collision detection result to obtain an automatic parking ...

Working method for realizing data security encryption for massive images

The invention discloses a working method for realizing data security encryption for massive images, which comprises the following steps of: S1, acquiring massive face image data through a wireless network, and forming initial encryption parameters from face images; and S2, substituting the encryption parameters into a chaos model, performing image chaos processing, and transmitting the face image data subjected to chaos processing to a remote server.

Submersible vehicle structure vibration sound radiation testing device used in large diving depth environment

The invention aims to provide a submersible structure vibration sound radiation testing device used in a large diving depth environment, which comprises a large diving depth environment sound vibration simulation cabin, a submersible structure device and a sound vibration signal testing system, and is characterized in that the submersible structure device is hung in the large diving depth environment sound vibration simulation cabin through a hinge hook; a pressure control valve, a pressure gauge, a first sound and vibration simulation cabin bus outlet, a second sound and vibration simulation cabin bus outlet, a first water outlet, a second water outlet and a hydrophone cable sealing outlet are arranged on the large diving depth environment sound and vibration simulation cabin; first excitation equipment, second excitation equipment and a vibration acceleration sensor are arranged in the submersible vehicle structure device. The device is placed on the horizontal ground, the damping material ...