236results about How to "Fast transmission" patented technology

The invention provides a data interaction method and device based on a shared memory, virtual electronic equipment and a storage medium, and the method comprises the steps: responding to a detected packet sending request of a first application for a first protocol stack of first virtual network equipment, and calling a first packet sending function; encapsulating the to-be-sent data into a first data packet based on the first packet sending function; obtaining a storage address of the first data packet, and mapping the storage address in a mode of directly accessing a mapping interface by a memory to obtain a mapped physical address; and filling the physical address into a corresponding position of the descriptor of the first virtual network equipment, and updating the position of a tail pointer of the descriptor. The RC and the EP are registered as the virtual network card through the network driving technology, so that the communication function can be realized through the PCIE slot and by means of the PCIE connecting line, data message transmission can be realized without the aid of peripheral equipment such as the network card, the stability of data transmission is improved, and the configuration cost of hardware is saved.

The invention relates to the technical field of data communication, and discloses an HPLC-HRF (High Performance Liquid Chromatography-High Radio Frequency) collaborative dual-mode data communication optimization method, which comprises the steps of data acquisition, data preprocessing, data transmission, central data processing and the like. According to the HPLC-HRF collaborative dual-mode data communication optimization method, data transmission is carried out by using an HPLC network and an HRF network in parallel, the bandwidths and the coverage ranges of the two networks are fully utilized, the overall efficiency of data transmission is improved, the data volume required by transmission is further reduced through the application of a data compression technology, the data transmission speed is increased, and the data transmission efficiency is improved. Redundant backup of data is ensured through a multi-path transmission strategy, even if one transmission path breaks down, the data can still safely arrive at a destination through other paths, temporary storage and recovery functions of the data in the transmission process are provided through a data caching and recovery mechanism, the risk of data loss is reduced, and the data transmission efficiency is improved. Through a network fault automatic switching mechanism, the standby network can be rapidly switched when the network fault is detected, and the continuity of data transmission is ensured.

The invention relates to the technical field of pilot state monitoring, in particular to a pilot state monitoring and flight data real-time synchronous fusion system, which comprises an information acquisition module used for acquiring physiological state information of a pilot and flight data information of an airplane in real time; the intelligent control module is used for controlling the operation of the camera, the electroencephalogram acquisition device and the electrocardiograph; the information processing module is used for carrying out preprocessing operation on the collected pilot physiological state information and the collected aircraft flight data; and the data fusion module is used for fusing the physiological state information of the pilot and the flight data parameters of the aircraft. The early warning assistance module is used for immediately sending out an early warning signal when an abnormality is found; and positioning information and rescue guidance are provided for a pilot under the emergency condition that the aircraft encounters danger. According to the current attention state and the task requirement of the pilot, the system can dynamically adjust the collection frequency and the collection position of the electroencephalogram collection device so as to improve the efficiency and the pertinence of data collection.

The invention belongs to the technical field of lithium batteries, and provides a preparation method of a boron-doped coated lithium iron manganese phosphate positive electrode material and a lithium battery, and the method comprises the following steps: S10, performing first pretreatment based on a lithium source, an iron source, a phosphorus source, a dopant, a dispersant, a first MOF and a solvent to obtain a first precursor; s20, performing first sintering crushing on the first precursor in an inert gas atmosphere to obtain a lithium iron phosphate precursor; s30, performing second pretreatment based on the second MOF, deionized water, a carbon source, a dispersing agent and the lithium iron phosphate precursor to obtain a second precursor; and S40, grinding and drying the second precursor, and carrying out second sintering crushing in an inert gas atmosphere to obtain the lithium iron manganese phosphate positive electrode material. Wherein the first MOF is a boron-based MOF, and the second MOF is a manganese-based MOF. The lithium ion intercalation and deintercalation efficiency is improved, the specific capacity, the cycle capacity retention ratio, the compaction density and the safety of the battery are improved, and the performance of the material is improved from multiple aspects.

The invention provides a model data processing method and device, and the method comprises the steps: obtaining original model data of a target model; determining repeated vertexes, deleting vertex data corresponding to the repeated vertexes to obtain de-duplicated vertex data, and performing quantization processing on the de-duplicated vertex data to obtain processed vertex data; according to the data type of the map data, compressing the map data to obtain processed map data; according to the material data, model components with the same material attribute are determined and combined, combined model components are obtained, and the material data of the combined model components serve as processed material data; and compressing and uploading the processed vertex data, the processed mapping data and the processed material data as new model data. By reducing redundant data, optimizing a data structure and adopting an efficient compression algorithm, light weight of model data is realized, so that the rendering efficiency and the transmission rate are improved.

The utility model relates to a double-break circuit breaker switch, which comprises a mechanism frame, a circuit breaker assembly and an isolating switch assembly, and the circuit breaker assembly comprises a solid-sealed polar pole, three fixing seats, a main shaft and three groups of transmission cam assemblies. The isolation switch assembly comprises three first static contacts, an insulation isolation shaft which is rotatably arranged on the mechanism frame, three insulation cams which are respectively arranged on the insulation isolation shaft, three isolation knives which are respectively arranged on the three insulation cams, three second static contacts which are arranged on a fixed beam of the mechanism frame, and a grounding contact assembly which is arranged on the mechanism frame. The two ends of the static contact are respectively provided with a first contact part and a second contact part which are matched with the isolation knife, and a limiting check ring which is matched with the isolation knife is arranged at the position, corresponding to the position between the first contact part and the second contact part, of the static contact. The vacuum circuit breaker has the advantages of simple structure, stable and reliable performance, good insulating property, high opening and closing speed and small volume.

The invention belongs to the technical field of charging piles, and discloses a charging pile CAN bus baud rate adaptive method, system and device and a storage medium. Comprising the following steps that internal CAN communication is used as a use object, a core node CMU evaluates the stability of a CAN communication link and dynamically adjusts the baud rate to optimize the communication performance by analyzing the accuracy of received frames, adaptive matching of the baud rate is carried out according to the accuracy of received messages for newly added nodes, and the communication performance is optimized. The communication efficiency and quality of each node in the CAN network are ensured, when the communication quality is reduced, the baud rate is reduced, errors in data transmission are reduced, and the accuracy and integrity of data are ensured; under the condition that the communication quality is good, the baud rate is improved, so that the data transmission speed is accelerated. Therefore, the communication efficiency can be improved, the time and resources required for data transmission can be reduced, and the technical problems that in the prior art, existing fixed-rate communication is prone to being interfered in a changeable application environment, and the communication efficiency is low are solved.

The present invention relates to the technical field of lithium ion batteries, and provides a lithium ion secondary battery, the electrolyte of the lithium ion secondary battery comprises a carboxylic ester solvent and an electrolyte lithium salt, the mass percentage content of the carboxylic ester solvent is A, the mass percentage content of the lithium bis (fluorosulfonyl) imide is B, and the mass percentage content of the lithium bis (fluorosulfonyl) imide is A; the thickness of the first adhesive layer close to one side of the positive plate in the diaphragm is C [mu] m, the thickness of the second adhesive layer close to one side of the negative plate is D [mu] m, and A, B, C and D meet the relational expression that (D-C) / (A + B) is more than or equal to 0.006 and less than or equal to 0.08. The lithium ion secondary battery can effectively solve the problem that lithium ion transmission is blocked after holes are blocked by the diaphragm adhesive layer, the transmission speed of lithium ions in the lithium battery is improved, the direct-current internal resistance of the battery is reduced, the cycle performance of the lithium battery at low temperature is improved, and the overcharge safety performance of the battery is improved.

The invention provides an extrusion device and method for cable production. The extrusion device comprises a rack, an extrusion mold, a wire conduit and a wire core surface treatment device, wherein the wire conduit is horizontally and fixedly arranged on the rack, is connected with the extrusion die and is used for guiding a wire core to enter the extrusion die; the wire core surface treatment device comprises a plurality of extrusion rods and a driving mechanism, the plurality of extrusion rods are uniformly arranged around the central axis of the wire conduit, one end of each extrusion rod is located in the wire conduit and is provided with an embossing bulge, and the other end of each extrusion rod movably penetrates through the outer side of the wire conduit in the radial direction of the wire conduit; and the driving mechanism is arranged on the outer side of the wire conduit and is used for synchronously driving the plurality of extrusion rods to reciprocate, so that the embossing bulges apply embossing on the outer surface of the wire core. The embossing is applied to the surface of the wire core, so that the contact area and the friction coefficient between the wire core and the insulating layer are increased, the adhesive force between the insulating layer and the wire core is improved, and the insulating layer is more stable and is not easy to strip or slide in the coating process.

The invention provides a multi-engine collaborative robot simulation method and system according to the claim 1, and the system comprises the steps: developing a simulation management system based on a UE5 three-dimensional simulation engine, and achieving the effective management and display of various information and data in a simulation process; a high-precision map is developed, a laser radar and other sensors are simulated to realize scene data acquisition and interaction, and the authenticity and credibility of a simulation environment are optimized for practical application simulation; based on Vortex dynamics modeling software, through a VHLInterface data interaction mode, robot and scene interaction dynamics modeling is carried out, and a robot simulation result is obtained; based on FastDDS communication middleware, data communication between the UE5 and the ROS2 is established, an ROS2 message format is compatible, and a hardware-in-the-loop simulation test of the controller is carried out. The technical problems that a multivariate control algorithm and a fine dynamic model are difficult to consider, data interaction of a simulation system is difficult, complexity and cost of the simulation system are high, and reliability is low are solved.

The invention relates to the technical field of batteries, in particular to a negative pole piece, a preparation method thereof and a battery. The negative pole piece comprises a current collector; the first negative electrode coating is arranged on the surface of at least one side of the current collector in the thickness direction, the second negative electrode coating is arranged on the surface, far away from the current collector, of the first negative electrode coating, the second negative electrode coating comprises a layered multi-element metal oxide, and the layered multi-element metal oxide comprises at least two metal elements, the layered multi-element metal oxide meets at least one of the following characteristics: the capacity of the layered multi-element metal oxide is greater than or equal to 100mAh / g; the specific surface area of the layered multi-element metal oxide is greater than or equal to 100m < 2 > / g; the layered multi-element metal oxide has a porous structure; the interlayer spacing of the layered multi-element metal oxide is greater than or equal to 0.15 nm. The ion diffusion rate of the negative pole piece can be improved, rapid transmission of sodium ions on the surface of the negative pole piece is facilitated, and the cycle stability and the rapid charging performance of the battery are further improved.

The invention discloses a high-entropy positive electrode material of a potassium ion battery and a preparation method and application of the high-entropy positive electrode material, the high-entropy positive electrode material is a layered oxide with a P2 / rock salt biphase symbiotic structure, the chemical general formula of the high-entropy positive electrode material is K < 0.6 > Mn < 0.75-x > Ni < 0.1 > Ti < 0.1 > Mg < x > Cu < 0.05 > O2, and x is more than 0 and less than or equal to 0.1. A high-temperature solid-phase method is adopted in the preparation process, the high-entropy layered oxide positive electrode material with symbiotic two phase structures of P2 and rock salt is finally formed by regulating and controlling the types and the content of doped elements, sliding of a TM layer in the charging process and large structural stress generated in the circulating process are relieved through introduction of a small amount of rock salt phase, and the performance of the positive electrode material is improved. And lattice distortion and cracks in particles in the long circulation process are improved, so that the electrochemical circulation stability and rate capability of the potassium ion battery are remarkably improved.

The invention discloses a distributed cross-network segment file transmission method. The method comprises the following steps of S1, deploying a file transmission service in a local area network; s2, carrying out transmission node registration among the local area networks through a file transmission service; s3, determining a transmission path according to whether a target node is contained in the local area network; s4, after a transmission path is obtained, encrypting the file fragments according to path information, and sending the encrypted file fragments to a next transmission node; s5, the receiving node decrypts the data packet according to the source node information and continues to transmit the data packet according to the routing information until the data packet arrives at the destination; s6, after receiving all the fragmented data, the receiver returns confirmation information of successful receiving to the sender; and S7, if the sender does not receive the receiving confirmation for a long time, re-sending the unconfirmed fragmented data packet. According to the invention, the file transmission efficiency and security are improved, and the reliability and stability of the system are enhanced.

The invention provides an LVDS (Low Voltage Differential Signaling) transmission system which comprises an LVDS sending device and a first receiving device, the LVDS sending device is connected with the first receiving device through a first LVDS bus, the first LVDS bus comprises an LVDS clock line and a plurality of LVDS data lines, the LVDS sending device sends data to the first receiving device through the first LVDS bus, and the first receiving device receives the data from the LVDS clock line. The first receiving device can eliminate delay deviation of the LVDS clock line and the LVDS data lines and receive data from the first LVDS bus. According to the invention, a higher-speed and longer-distance LVDS data transmission scheme can be supported.

The invention relates to the technical field of precision positioning tables, and discloses a heavy-load piezoelectric deflection table which comprises a shell, an amplification piezoelectric driver and a moving carrier plate. The shell comprises a hollow rectangular-ambulatory-plane rectangular ring cavity. And the amplification piezoelectric actuator is arranged in the rectangular ring cavity. And the amplification piezoelectric drivers comprise two X-axis amplification piezoelectric drivers, two Y-axis amplification piezoelectric drivers and four Z-axis amplification piezoelectric drivers. And the moving support plate is arranged above the amplification piezoelectric actuator and comprises a rectangular annular X-axis moving support plate, a rectangular annular Y-axis moving support plate and a rectangular annular Z-axis moving support plate. The XY-axis movement carrier plate comprises an X-axis movement carrier plate and a Y-axis movement carrier plate. The X-axis amplification piezoelectric actuator, the Y-axis amplification piezoelectric actuator and the Z-axis amplification piezoelectric actuator are connected in series in the X-axis plane, the Y-axis plane and the Y-axis direction, so that thetaX-axis deflection and thetaY-axis deflection and Z-axis linear motion are achieved. The system has the advantages of small series structure coupling, high bearing capacity, high closed-loop repeated positioning precision and high adaptability.

The invention discloses a QUIC protocol secure transmission method based on hierarchical encryption, and the method comprises the steps: collecting control message data, sensor data and video image data, and adding feature parameters to the data; introducing an XGBoost decision tree model, and training the XGBoost decision tree model by using the data added with the characteristic parameters to obtain a trained XGBoost decision tree model; dividing data input into the model into control message data, sensor data and video image data by using the trained XGBoost decision tree model; the control message data is classified as a high-level data layer, the sensor data and the video image data are classified as a secondary data layer, and the data sending end encrypts the high-level data layer and the secondary data layer respectively to obtain encrypted data streams; in combination with the QUIC protocol, the data sending end encapsulates and integrates the encrypted data streams into the QUIC encrypted data packets, and completes the secure transmission of the data, thereby achieving the improvement of the encryption efficiency and overall performance of the QUIC protocol.

The invention relates to a power grid equipment image recognition method and device, computer equipment and a storage medium, and relates to the technical field of artificial intelligence. The method comprises the following steps: receiving target image data sent by shooting equipment through a pre-configured interface standard in an airborne image recognition system; the target image data is image data shot by a shooting device carrying an image sensor in a preset shooting scene; the image sensor communicates with the shooting equipment through an interface standard; determining a computing resource demand of the target image data, and if the computing resource demand is smaller than a computing resource of the edge computing terminal, identifying the target image data through a trained equipment identification model to obtain basic information of power grid equipment contained in the target image data; the equipment identification model is obtained by training based on an image training set containing classification labels of the power grid equipment; the basic information comprises category information and position information. By adopting the method, the image recognition efficiency can be improved.

The embodiment of the invention provides a single-bus communication method and device, a chip and a medium, and the method comprises the steps: enabling a host to enter an initialization mode after the host confirms that an internal power supply and a clock of a slave are stable; the host sends a wake-up code to the slave within a set time to wake up the slave, and releases the bus to enter a normal communication mode; the host sends a communication signal to the slave through the improved communication frame; after the host receives a response signal of the slave, the host releases the bus, the bus is pulled to a high level from an external pull-up resistor, and the transmission is ended; wherein the format of the improved communication frame comprises ten codes, one code corresponds to one bit, and the ten codes sequentially comprise one start bit, six address bits, one read-write control bit, one data bit and one response bit. A wake-up code is set before communication between the host and the slave, so that the slave is prevented from being mistakenly waken up. According to the communication mode, the coding mode is simplified, the chip area is reduced, and the transmission speed of the chip is also improved.

The invention relates to the technical field of wearable devices, in particular to a wearable device and a control method thereof. An equipment body of the wearable equipment comprises a shell, a mainboard, a functional module, an ultrasonic module and a sensor module, and the mainboard controls the ultrasonic module to transmit and receive ultrasonic signals according to current underwater environment parameters and / or human physiological parameters detected by the sensor module; the main board further controls the function module to execute corresponding functions according to the target ultrasonic signals. The ultrasonic signal can be changed when the user operates the wearable device, so that the wearable device can realize function regulation and control on the wearable device without setting a button, the user operation is facilitated, the transmission speed of the ultrasonic signal is high, the reliability is high, and the signal transmission real-time performance of the wearable device is effectively improved.

The invention relates to an IP and IPFC bridging device based on an FPGA, belongs to the technical field of Ethernet network and FC-AE network communication, and solves the problem of complexity of Ethernet network and FC-AE network communication equipment in the prior art. The bridging device comprises an IP data transmission module used for analyzing an IP data frame sent by an Ethernet network, transmitting the IP data frame to a conversion control module, and transmitting the IP data frame converted by the conversion control module to the Ethernet network; the IPFC data transmission module verifies the FC data frames sent by the conversion control module, transmits the FC data frames without errors to the FC-AE network, and transmits the FC data frames sent by the FC-AE network to the conversion control module; the conversion control module converts effective data sent by the IP data transmission module into FC data frames, sends the FC data frames to the IPFC data transmission module, converts the FC data frames sent by the IPFC data transmission module into IP data frames, and sends the IP data frames to the IP data transmission module. Communication between the Ethernet network and the FC-AE network is realized, and the device is simple.

The invention provides a preparation method of nano indium tin oxide powder, and belongs to the technical field of preparation of electronic ceramic transparent oxide functional inorganic materials. The preparation method comprises the following steps: in an oxygen-containing environment, performing electric arc gasification on an indium tin metal melt, and oxidizing metal steam generated by the electric arc gasification to obtain the nano indium tin oxide powder, the current applied for generating the electric arc is 500 to 1200 A, and the voltage is 50 to 120 V. The preparation method provided by the invention is simple, the oxidation reaction time is short, no exhaust gas is discharged, and meanwhile, the problems of wastewater and waste acid discharge and difficult impurity removal caused by addition of strong acid are avoided. The preparation method provided by the invention can realize continuous production and is high in production efficiency; and the particle size D50 of the prepared nano indium tin oxide powder can be kept to be less than 0.5 mu m and D90 is less than 1 mu m.

The invention discloses a high-conductivity sodium ion battery positive electrode material / organic conductive polymer composite material and a preparation method thereof, and the preparation method comprises the following steps: S1, preparation of a chain product: adding water into an organic conductive polymer monomer for dissolving, adjusting the pH value of the solution to be acidic, adding an oxidizing agent, and stirring to obtain the chain product; inducing an organic conductive polymer monomer to generate a polymerization reaction to form a chain product; s2, preparation of precursor slurry: adding a sodium source, an iron source and a sulfur source into the solution for forming the chain product, and fully dissolving to form uniform precursor slurry; s3, preparation of precursor powder: drying the precursor slurry to realize solid-liquid separation so as to obtain dried precursor powder; and S4, high-temperature sintering: calcining the precursor powder in a protective atmosphere, and naturally cooling to obtain the Na < 2 + x > Fe < 2-x > (SO4) 3 / organic conductive polymer composite positive electrode material. The preparation method has the characteristics of high electronic conductivity, low specific surface area, high compaction density and excellent electrochemical performance.

The utility model belongs to the technical field of electrolytic baths, and particularly relates to a pure water hydrogen production PEM electrolytic bath structure which comprises an anode plate and a cathode plate, the anode plate is provided with an oxygen outlet and a water inlet, the water inlet is fixedly provided with a first connecting shell and a second connecting shell, the first connecting shell is symmetrically provided with connecting assemblies, and the second connecting shell is fixedly provided with a second connecting shell. A filter screen is arranged on the frame and located on one side of the water inlet. According to the utility model, pure water can be conveniently filtered by the filter screen, tiny impurities in the pure water can be intercepted by the filter screen, water flow containing the impurities is prevented from entering the electrolytic bath, when the filter screen is regularly cleaned, the first connecting shell is detached from the second connecting shell by operating the connecting assembly, and then the frame is pulled to move out of the second connecting shell, so that the filter screen is cleaned; the filter screen is arranged on the filter screen to clean impurities on the filter screen, blockage of the filter screen caused by impurity accumulation is avoided, adverse effects of mechanical impurities possibly contained in pure water on the electrolysis process are avoided by filtering the pure water, and the purity of hydrogen produced by the electrolytic bath is improved.

The invention provides a composite solid electrolyte as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. Specifically, the composite solid electrolyte is prepared from the following components in parts by weight: 10-20 parts of an inorganic solid electrolyte, 10-20 parts of polyethylene glycol, 10-20 parts of polyoxyethylene, 1-3 parts of a cross-linking agent, 10-20 parts of lithium salt and a plurality of solvents, wherein the cross-linking agent comprises an isocyanate compound. According to the invention, the cross-linking agent containing the isocyanate group, the inorganic solid electrolyte and the polyethylene glycol are subjected to nucleophilic addition reaction, so that the inorganic solid electrolyte is skillfully connected with the polyethylene glycol through chemical bonds, and an organic-inorganic interface is further optimized; the organic-inorganic composite solid electrolyte disclosed by the invention has good ion transport property and a relatively wide electrochemical window, and the cycle performance and the rate capability of a lithium battery can be effectively improved.

The invention discloses a semi-solid sodium ion hard carbon negative electrode material, a preparation method thereof and a battery, and belongs to the technical field of semi-solid sodium ion batteries, and the preparation method comprises the following steps: contacting a Na-Sn metal sheet with a hard carbon negative electrode sheet containing Al2O3 powder in a first electrolyte environment for pre-sodium treatment to obtain the negative electrode material; the first electrolyte contains a sodium salt and an organic solvent. According to the invention, a Na-Sn-Al-O structure capable of stably releasing active sodium is formed on the surface of the hard carbon negative plate on the surface of hard carbon through a direct contact method, and the structure has a synergistic effect and can be used as a thin and uniform SEI protection layer, so that the transmission speed of sodium ions is increased, continuous consumption of an electrolyte in a circulation process is avoided, and the service life of the lithium ion battery is prolonged. The loss of sodium ions in the first-circle charge-discharge process of the layered oxide is compensated, the first cycle efficiency of the battery is improved, meanwhile, the hard carbon surface is separated from the electrolyte, and the continuous side reaction between the electrolyte and the hard carbon is effectively inhibited.

The invention relates to a lifting type cage body arranging device which comprises a conveyor, a gantry rack, a lifting assembly, a supporting assembly and a limiting mechanism, the conveyor penetrates through the gantry rack, the lifting assembly is used for driving a cage body to move upwards, the supporting assembly is used for supporting the cage body moving to the upper portion, and the limiting mechanism is used for limiting the supporting assembly. The cage bodies are stacked into a pile from bottom to top, then the cage bodies are directly conveyed outwards, the cage bodies do not need to be stacked manually, efficiency is improved, the conveying speed of the cage bodies can be higher, and then the slaughtering speed of the front end can be increased.

The invention discloses a non-orthogonal multiple access system transmission method based on dual-frequency index modulation. According to the method, firstly, M-QAM modulation and dual-frequency index modulation of a specific system are respectively carried out on an input multi-user bit stream signal at a signal processing end of a base station, then OFDM-DFIM (Orthogonal Frequency Division Multiplexing-Distributed Frequency Index Modulation) modulation signals are generated by utilizing an orthogonal frequency division multiplexing technology, finally, channel conditions of all users are compared, power is allocated to all the users, and the signals are transferred to a time domain to be sent after superposition. Therefore, same-frequency simultaneous superposition transmission of signals of multiple users in a power domain is realized. And at a signal receiving end, performing signal separation by using a serial interference cancellation technology, and sequentially demodulating and restoring bit stream signals of each user through maximum likelihood estimation. According to the method, the spectrum efficiency is improved and the bit error rate is reduced by improving the proportion of the index information in all information, so that the system performance is further improved.

The utility model relates to a double-break isolating switch. Comprising a mechanism frame, an insulation isolation shaft rotationally arranged on the mechanism frame, three insulation driving cams arranged on the insulation isolation shaft in a linkage mode, three isolation knives arranged on the three insulation driving cams in a linkage mode, and three upper static contacts arranged on a fixed beam of the mechanism frame and matched with the three isolation knives. The three upper static contacts are arranged on a fixing frame of the mechanism frame, the three lower static contacts are arranged on the fixing frame of the mechanism frame and matched with the three isolation knives, the grounding contact assembly is arranged on the mechanism frame and matched with the three isolation knives, and the mechanism frame is provided with an insulating partition plate which is arranged between the grounding contact assembly and the three upper static contacts in a partition mode. The utility model has the advantages of simple structure, stable and reliable performance, fast opening and closing speed, good insulation performance and small volume.

The utility model relates to the technical field of ultraviolet aging test boxes, in particular to an ultraviolet aging test box, and solves the problems that most existing ultraviolet aging test boxes in the prior art are of an integrated structure, operation is very inconvenient when positions of samples are regularly replaced, the number of placed samples is limited, and the test efficiency cannot be improved. The ultraviolet aging test box comprises a test box body and a placement bin, a placement groove matched with the placement bin is formed in one side of the test box body, and a box door is hinged to one side of the placement groove; the side wall of the containing bin is slidably connected with the inner wall of the containing groove, two shaft rods are symmetrically arranged in the containing bin, one end of each shaft rod is rotationally connected with the inner wall of the containing bin, and the other end of each shaft rod penetrates through the containing bin through a shaft sleeve to be connected with a belt wheel. According to the utility model, the positions of materials at different positions outside the shaft rod can be changed, so that the purpose of uniform test is realized, the quantity of loaded materials during test is increased, and the efficiency of the whole test is improved.

The invention provides alkyl glycoside modified lithium iron phosphate and a preparation method thereof, relates to the technical field of lithium battery positive electrode materials, and solves the technical problem that the modification effect is influenced by non-uniform coating of carbon nanotubes in existing carbon nanotube coated lithium iron phosphate. The composite material comprises nano LiFePO4 coated with double layers of carbon nanotubes, the inner single-walled carbon nanotube layer and alkyl glycoside are used as a shell to form a core-shell structure with nano LiFePO4; the outer multi-walled carbon nanotube layer is doped with doping elements through chemical vapor deposition and forms bridging and branching with the adjacent carbon nanotube layer so as to form a more complex three-dimensional network structure. The nano LiFePO structure coated with the double-layer carbon nano tube can obviously improve the electronic conductivity of the material; the transmission speed of lithium ions can be increased, so that the charging and discharging efficiency of the battery is improved; the technical problem that in the coating process of the carbon nano tube, the modification effect is affected due to uneven coating is solved.