732results about How to "Quick switch" patented technology

The invention relates to the technical field of electronic devices, in particular to a monomolecular electric memristor based on dipole control and a preparation method thereof.The monomolecular electric memristor comprises a molecular heterojunction, and the molecular heterojunction is formed by connecting dipole molecules and graphene point electrodes through amido bonds; the dipole molecule comprises an amide structure based on a carbazole nitrogen-containing heterocyclic ring unit, under the action of an external electric field, a side chain chemical bond of the dipole molecule can rapidly rotate, the size and direction of an intramolecular dipole moment can be changed, the molecule can be rapidly and stably switched among different resistance states, and the read-write speed of the memristor is remarkably improved; the storage state is stably kept under the power-off condition, and the long-term stability and reliability of the memristor function are ensured. The preparation method comprises the processes of introducing dipole molecules and forming amido bonds between the dipole molecules and the graphene point electrode, and the preparation method is simple and convenient to operate, mild in condition and beneficial to large-scale production.

The embodiment of the invention provides a communication mode self-adaptive switching method, device and equipment based on an SDN (Software Defined Network), which are applied to the technical field of communication, and the method comprises the following steps: receiving a real-time monitoring result reported by a channel state monitoring unit, analyzing the monitoring result, and obtaining a current communication demand and channel state information; according to the current communication requirement and the channel state information, whether communication mode switching or transmission resource redistribution needs to be carried out is judged; if communication mode switching or transmission resource redistribution needs to be carried out, a corresponding instruction is generated and sent to the programmable network equipment; therefore, after the programmable network device receives the instruction, corresponding operation is executed, and communication mode switching or transmission resource redistribution is completed. In this way, the limitation of a single communication mode and fixed transmission resource allocation can be effectively overcome, and a more reliable, efficient and flexible communication solution is provided for the modern communication field.

The invention relates to the technical field of laser processing, in particular to multi-axis ultrafast laser and ultrasonic combined processing equipment. The five-axis linkage machining equipment is used for simultaneously or independently moving in five different axial directions of an X axis, a Y axis, a Z axis, an A axis and a B axis, and a workpiece to be machined is clamped on the workbench; the laser generator is mounted on a cross beam of the five-axis linkage processing equipment; the ultrasonic vibration main shaft is mounted on a Z-axis mounting seat in the five-axis linkage machining equipment; the four-axis small motion platform is mounted on a Z-axis mounting seat in the five-axis linkage machining equipment and is used for accurately adjusting the spatial position of the galvanometer and the rotating angle of a laser beam, so that the four-axis small motion platform and the ultrasonic vibration main shaft cutter form combined machining with different laser incident angles; the three-dimensional scanner is used for obtaining the six-degree-of-freedom point cloud model of the workpiece to be machined. A three-dimensional scanner, a galvanometer and an ultrasonic vibration main shaft are integrated in five-axis linkage machining equipment, so that the equipment compactness and the operation convenience are improved; therefore, the ultra-fast laser is suitable for hard light path transmission.

The invention provides a multi-station numerical control gear grinding machine tool which comprises a machine tool body, a rotary indexing table stand column, a sliding table, a mounting base, a rotary shaft and a grinding wheel spindle, quick switching of workpieces can be achieved only through rotation of the rotary indexing table stand column, the distance between the workpiece spindle and the center of the rotary indexing table stand column is shortened by arranging a workpiece containing concave position, and the machining efficiency is improved. And the transmission precision can be improved. The rotating shaft is arranged in the second installation space, the second installation space communicates with the first installation space, a rotating drive of the rotating shaft can be arranged in the first installation space, the overall gravity center of the grinding wheel spindle and the sliding table is located in the sliding table, the stability of the structure can be improved, and then the transmission precision is improved. Therefore, the multi-station numerical control gear grinding machine tool can effectively improve the transmission stability and the transmission precision, so that the machining quality is improved, and the stability of equipment is improved.

The invention discloses a surface defect indentation marking and rapid indentation response testing device and method, and relates to the technical field of precise instruments and industrial automatic detection.The surface defect indentation marking and rapid indentation response testing device comprises a supporting unit, a macroscopic moving unit, a rapid switching unit and a precise testing unit, the macroscopic moving unit is arranged on the supporting unit, the rapid switching unit is connected with the macroscopic moving unit, the precision testing unit is arranged on the macroscopic moving unit, and the precision testing unit comprises a scanning structure and an indentation marking structure. The macroscopic moving unit can drive the precise testing unit to move, and the rapid switching unit is used for switching the positions of the scanning structure and the indentation marking structure. According to the surface defect indentation marking and rapid indentation response testing device and method, the positions of the scanning structure and the indentation marking structure can be rapidly switched.

The invention discloses an automatic replacement platform for probes. The automatic replacement platform comprises a platform body, a base, a probe storage mechanism, a probe transfer mechanism, a probe docking mechanism and a control part, a probe connector is arranged on the platform body, the base is fixedly installed in a working area of the platform body, and the base and the platform body are connected through a supporting body. The probe storage mechanism comprises a probe frame, a connecting plate and a rotating shaft. The probe frame is provided with a plurality of probe storage positions distributed along the circumference, and the adjacent included angle is smaller than 90 degrees. A horizontal moving assembly of the probe transfer mechanism drives a fixed plate to reciprocate in the horizontal direction, and a rotating assembly drives a probe frame to rotate around a vertical shaft; the probe butt joint mechanism drives a probe joint to move in the vertical direction through a lifting mechanism, and accurate butt joint and separation of probes are achieved. And the control part coordinates the actions of all the parts to realize automatic replacement of the probe. According to the invention, automatic operation of probe replacement is realized, the replacement efficiency and the measurement precision are improved, and the device is suitable for high-frequency measurement scenes and applications of various probe specifications.

The invention relates to the technical field of gear machining, in particular to planetary reducer gear machining grinding equipment which comprises a workbench, a U-shaped sliding groove is formed in the upper end of the workbench, a mechanical arm is slidably connected to the inner side wall of the U-shaped sliding groove, and a clamping structure is welded to the upper end of the U-shaped sliding groove. A clamping structure is fixedly installed at the upper end of the mechanical arm, an inner gear ring is clamped to one side of the clamping structure, a connecting column is fixedly installed at the upper end of the mechanical arm, a positioning column is fixedly installed at the end, away from the mechanical arm, of the connecting column, and a rotating ring is rotationally connected to the outer side wall of the positioning column. According to the abrasive disk correcting device, the abrasive disk is pushed by the push rod, so that the abraded abrasive disk is quickly popped out, then the most locking rod is corrected through reverse rotation of the cross-shaped rotary shaft, meanwhile, a new abrasive disk is clamped on the locking rod, meanwhile, the abrasive disk can be switched by rotating the rotary ring, and the working efficiency is improved.

The utility model provides an industrial robot suitable for tundish spraying. The industrial robot comprises an industrial robot body and a robot frame. The robot guide rail is arranged on the robot frame, the industrial robot is arranged in the robot guide rail, the industrial robot slides along the robot guide rail to spray a tundish, a lifting lug is arranged on the robot frame, and a positioning mounting hole is formed in the bottom of the robot frame. And the positioning mounting holes are fixedly connected with a fixed base arranged on a spraying site. By the adoption of the frame type robot structure, the robot can be rapidly switched between tundishes of different specifications and different positions, the tundishes do not need to be hoisted to specific stations, and spraying efficiency is improved.

The utility model relates to the technical field of thermal insulation boxes, in particular to a fully-assembled passive thermal insulation box inner temperature control chamber structure, which comprises a gel type PCM (Pulse Code Modulation) plate used for maintaining a specific temperature interval; the gel type PCM plate hanging bag is used for accommodating and fixing the gel type PCM plate; the supporting frame is used for supporting the gel type PCM plate hanging bag and comprises a top supporting rod, a vertical supporting rod, a bottom supporting rod and a supporting top plate, and all the parts are fixedly connected through bolts. According to the utility model, a temperature control chamber framework in the box body can be built and a gel type PCM can be fixed by matching with a hanging bag through a small number of standard general structural rod pieces and auxiliary components, the disassembly and assembly are simple and convenient, the operation convenience is improved, the rapid size switching of the box body is realized on the premise of not increasing any components, and the cost is reduced. The space utilization rate in the transportation and storage process is improved, the size of the box body can be flexibly changed and adjusted through the universal structural design, and the development time and cost of a new-size box type are greatly shortened and reduced.

The utility model discloses an automatic testing device for an electric steering engine. The automatic testing device comprises a control cabinet and a load table, the load table comprises a table body, and a main shaft fixing support and a spring rod fixing support are arranged at the two ends of the table body respectively. One end of the spring rod is fixed on the spring rod fixing bracket, and the other end is connected with the main shaft through the connecting flange and the torque sensor; the main shaft is fixed on the main shaft fixing bracket; the main shaft is also sleeved with a photoelectric encoder; the control cabinet comprises an industrial personal computer, a power supply, a steering engine tester and a display which are arranged in a cabinet, the industrial personal computer is connected with the steering engine controller through a serial port cable, the steering engine tester is respectively connected with the torque sensor and the photoelectric encoder through communication cables, and the industrial personal computer is also respectively connected with the steering engine tester and the display. According to the utility model, rapid clamping of the steering engine and rapid switching of different torque loads can be realized, and the reliability of the steering engine test and the efficiency of the test work are improved.

The invention discloses a radish planting harvester. The radish planting harvester comprises a mounting frame and a harvesting and conveying assembly assembled on the frame. The planting assembly and the storage assembly are selectively installed behind the harvesting and conveying assembly. The harvesting and conveying assembly comprises two sets of adjusting supports, two sets of inclination angle adjusting mechanisms and two sets of conveying mechanisms, the adjusting supports are rotationally installed on the frame, the inclination angle adjusting mechanisms are in linkage with the adjusting supports, and the two sets of conveying mechanisms are assembled on the adjusting supports respectively. The planting assembly comprises a detachable mounting bracket A, and a ditching hoe, a seeding mechanism and a soil covering mechanism are sequentially assembled on the mounting bracket A; the storage assembly comprises a mounting bracket B and a storage box, and the mounting bracket B is also detachably fixed on the frame. The driving assembly is assembled on the frame and is connected with the transmission mechanism, and the seeding mechanism is in power connection with the driving assembly in a detachable manner. The device has the beneficial effects of reducing the equipment cost, improving the working efficiency and enhancing the stability, and a more efficient and economical solution is provided for modern agriculture.

The invention relates to a magnetic control fast switch and dynamic voltage restorer combined power supply switching system and method. The system comprises a magnetic control switch unit, a voltage monitoring unit, a voltage compensation unit and an arc extinguishing unit. The magnetic switch unit is made of a novel magnetic control material and forms a vertical motion opening and closing mechanism through excitation and demagnetization of a built-in coil and assistance of a spring, and the vertical motion opening and closing mechanism is used for changing an internal magnetic domain and rapidly opening and closing. The voltage detection unit adopts a double-second-order generalized integral phase-locked loop voltage monitoring structure and is used for detecting instantaneous phase and frequency information of power grid voltage; the voltage compensation unit adopts a dynamic voltage restorer and is used for performing voltage compensation according to a difference value between a current power supply and an objective table power supply in a power supply switching gap so as to effectively maintain the stability of load voltage when voltage sag occurs in a power grid; and the arc extinguishing unit adopts a T-shaped double-outlet vacuum arc extinguishing chamber and is used for realizing zero arc in the whole power supply switching process. According to the invention, rapid switching of the power supply can be realized, and continuous voltage is ensured in the switching process.

The invention provides a lens switching method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a target zooming range of a lens in a current shooting mode in response to the detection that the electronic equipment works in a rapid zooming state; determining a target lens set needing to be started in the current period in the shooting mode according to the target zoom range; and switching to each target lens in the target lens set. Thus, the target shot set activated in the current frame period can be determined in advance, the problem of reactivating the shot in the current frame period is avoided, it is guaranteed that the target shot in the target shot set is rapidly switched without the jamming phenomenon, and the effect of smoothly previewing the image is achieved.

The embodiment of the invention provides a protection method and device for a DDoS attack, and the method comprises the steps: determining a target client, obtaining a client IP for the target client, and enabling the client IP to have corresponding first gateway information; when the DDOS attack is detected, determining an attacker IP from the client IPs based on the DDOS attack; generating second gateway information; and determining other client IPs except the attacker IP as a first target IP, and sending the second gateway information to the first target IP, so that other clients corresponding to the first target IP execute business service pushing based on the second gateway information, and the DDoS attack protection efficiency is integrally improved.

The utility model discloses an expandable injection molding machine and an injection molding system. The injection molding machine specifically comprises a rotating table, an expanding assembly, a rotating motor, a first front mold, a second front mold, an expanding front mold, a mold rear mold and an injection molding unit, each side face of the rotating table is provided with a rear mold, and the first front mold and the second front mold are arranged on the two sides of the rotating table; the expanding assembly is connected with the rotating table, a detachable expanding front mold is mounted on the expanding assembly, and the expanding front mold is arranged on the adjacent side faces of the first front mold and the second front mold; the rotating motor is used for driving the rotating table to rotate, so that the mold rear mold is sequentially switched to mold closing positions of the first front mold, the second front mold and the expanding front mold; the injection molding unit is used for injection molding of colored materials. According to the expandable injection molding machine provided by the utility model, rapid switching between a double-color injection molding working state and a three-color injection molding working state can be realized, and different products can be subjected to injection molding only by dismounting or mounting the expansion front mold according to requirements without integrally replacing the injection molding machine.

The invention relates to a bar surface high-speed laser cladding device which comprises a laser cladding head, the laser cladding head comprises an outer cylinder seat, an inner cylinder and a nozzle head, the inner cylinder is arranged in the outer cylinder seat in a penetrating mode, the lower end of the inner cylinder is sleeved with the nozzle head, and the nozzle head is rotationally connected with the outer cylinder seat; a mixing chamber is formed between the nozzle head and the inner barrel, and material guide structures are arranged on the inner walls of the two sides of the mixing chamber; a through hole is formed in the side wall of the upper end of the nozzle head in a penetrating mode, material pipe bases and air pipe bases are arranged on the side wall of the outer cylinder base, the air pipe bases are located between the material pipe bases, and air conveying pipes are connected to the air pipe bases. Conveying channels are arranged at the positions, located on the material pipe bases and the air pipe bases, of the outer cylinder base, the conveying channels correspond to the through holes in position and communicate with the through holes, the through holes communicate with the conveying channels by rotating the nozzle head, rapid switching of different types of cladding materials can be achieved according to actual requirements, and the requirement for rapid switching of the cladding materials is met. And multiple channels can be adopted for material conveying, so that alloying of cladding materials is achieved.

The invention relates to the technical field of speed reducer performance testing, in particular to a performance testing device for a hydraulic motor speed reducer assembly, which comprises a test board, and a hydraulic motor, a speed reducer and a torque sensor are sequentially and fixedly mounted on the top surface of the test board from front to back. The rear end of the torque sensor is connected with a uniform load assembly used for loading through arranging a connecting assembly, and the right side of the connecting assembly is provided with an instantaneous load assembly used for adding an instantaneous load. The connecting assembly comprises a coupling whose front end is coaxially connected with the torque sensor, a connecting cylinder structure whose front end is coaxially connected with the rear end of the coupling, and a driving lever fixed on the outer wall of the connecting cylinder structure. According to the testing device, the instantaneous load assembly is arranged, so that an instantaneous load can be given to the speed reducer during detection, and the condition that the speed reducer is subjected to the instantaneous load can be detected; in addition, the instantaneous load assembly and the connecting assembly are arranged, so that the load condition is quickly changed, and the operation is convenient and simple.

The invention belongs to the related technical field of integrated circuit testing, and discloses a power semiconductor dynamic parameter alternating test system, which comprises a plurality of groups of test fixtures, a protection device, a switching matrix and a limiting trigger circuit, and is characterized in that the test fixtures are independently and controllably used for clamping and fixing each test object; the protection device is designed to be capable of being switched among a plurality of groups of test clamps, and after the protection device is switched to a certain group of test clamps and completely covers the test clamps, the protection device immediately triggers the limiting trigger circuit installed at the test clamps. And the limiting trigger circuit is used for activating the switching matrix after being triggered, then distributing the test resources to the current test fixture, and executing an alternate dynamic parameter test. The invention further discloses a corresponding testing method. According to the invention, the test process is optimized, the test preparation time is reduced, the test efficiency of the power semiconductor can be significantly improved, and the safety and reliability of the test process are enhanced.

The invention discloses a video content retrieval method and device based on television system voice interaction and a terminal, and relates to the technical field of video processing, and the method comprises the steps: when a video is played for the first time, extracting a picture frame from the video at a preset frequency, converting the picture frame into a multi-dimensional image feature vector and a corresponding video timestamp, and carrying out hierarchical storage in a database, constructing vectorized data containing visual semantic information; obtaining a voice retrieval instruction, performing intention recognition and semantic understanding, extracting a detection keyword, and generating a multi-dimensional retrieval feature vector; calculating a matching degree between the multi-dimensional retrieval feature vector and a multi-dimensional image feature vector of a video picture frame stored in a database, and screening out picture frames of which the similarity is higher than a preset similarity threshold to form a retrieval candidate matching set; and determining matched picture playing. The video content retrieval method is efficient, accurate and high in interactivity, and retrieval experience and operation efficiency of the user in the video watching process are remarkably improved.

The utility model provides a kind of circuit board test fixture, it is related to the technical field of circuit board, including guide piece and clamping module.Guide piece forms adjustment path;Clamping module includes two clamping components, two clamping components are spaced apart in guide piece, and at least one of two clamping components is movably positioned along adjustment path setting, clamping component is equipped with the clamping part of electrically energizable setting.In the utility model, the clamping part of two clamping components is respectively used to clamp the two contacts of circuit board, and clamping part is electrically energizable setting, to realize the fixation of circuit board and power-on test.Further, at least one of two clamping components is movably positioned along guide piece, i.

This utility model discloses a combined training device, including a base, two weight assemblies, a dumbbell bar, and a kettlebell handle. The two weight assemblies are placed on the base and arranged left and right, with connecting holes on each weight assembly. Each end of the dumbbell bar has a first connecting seat for longitudinal sliding engagement with the weight assembly. The first connecting seat has a mounting hole communicating with the connecting hole. Two spindles, arranged left and right, are disposed inside the dumbbell bar and slide laterally with it, extending into the mounting hole on the same side. The kettlebell handle has a second connecting seat for longitudinal sliding engagement with the weight assembly. The second connecting seat has a socket, a pin, and a locking element. The socket communicates with the connecting hole, the pin passes through the socket, and the locking element locks the pin. The advantage is that it allows for quick switching between dumbbells and kettlebells, making it convenient for users.

The utility model discloses a modularized combined deformation signboard capable of being quickly updated, and particularly relates to the technical field of signboards, the modularized combined deformation signboard mainly comprises a switching rotating block, a plurality of magnets are embedded and magnetically attracted on the outer wall of the switching rotating block, one side of each magnet is bonded and fixed with a module identification strip, and one side of the switching rotating block is provided with a combined switching assembly; the combined switching assembly comprises a rotating shaft fixedly arranged on one side of the switching rotating block; the combined switching assembly further comprises a sleeve plate, a rotating cap, a linkage shaft and a sleeving plate. The combined switching assembly is adopted, the magnets on the eight module identification strips are magnetically attracted to the switching rotating block to achieve combination, the linkage shaft and the rotating shaft can rotate the switching rotating block, the eight module identification strips are rotated, updated and replaced corresponding to different kindergarten child name identifications, signboards of different shapes and names are rapidly updated and switched, and the kindergarten child name identification switching device is simple in structure, convenient to use and high in practicability. The use limitation is small.

The invention relates to the technical field of sonar emission signal source systems, in particular to a sonar emission signal source system based on a DDS and a working method. Comprising an ARM end, a main control circuit and a transmitting circuit, the ARM end is connected with the main control circuit, the main control circuit is connected with the transmitting circuit, the ARM end issues a working parameter instruction to the main control circuit, the main control circuit generates a corresponding waveform signal after receiving and analyzing the instruction, and the waveform signal is filtered through the transmitting circuit; the working parameters sent by the ARM end comprise center frequency, bandwidth and pulse width; the main control circuit uses an FPGA (Field Programmable Gate Array) as a main controller, the FPGA main control circuit adopts an XC6SLX16 / 25-2FTG256 chip, and the FPGA main control circuit is also connected with a 50MHz clock crystal oscillator, a serial SPI (Serial Peripheral Interface) configuration chip, a low-dropout voltage-stabilizing chip and a JTAG (Joint Test Action Group) interface; and the low-dropout voltage-stabilizing chip provides voltage for the system. A direct digital frequency synthesizer (DDS) technology is used, corresponding single-frequency signals or LFM signals can be generated according to received instructions of parameters such as frequency, bandwidth and pulse width of a working center, and application requirements of special occasions are met.

The utility model relates to the technical field of paint film testing, in particular to a device for testing the stone impact resistance of a paint film, which comprises a blanking pipe and a bearing platform positioned below the blanking pipe, the blanking pipe is used for directionally putting stones for testing; the bearing platform comprises a mounting support and a base plate, one end of the base plate is hinged to the mounting support, and the other end of the base plate is connected with the mounting support through a supporting piece. The length of the supporting piece or the connecting position of the supporting piece and the mounting support is adjustable, and the supporting piece is used for simulating stone hit conditions at different angles; the substrate is provided with a U-shaped card slot used for placing a test card. Through the device, the problem that an existing testing device is complex in structure can be effectively solved, and testing is more stable.

The utility model relates to the technical field of file storage cabinets, and discloses a rotary file storage cabinet with an automatic classification function, which comprises a supporting bottom plate, the top of the supporting bottom plate is fixedly connected with a supporting base, the top of the supporting bottom plate is fixedly connected with a classification mechanism, and the top of the supporting base is fixedly connected with a connecting chassis. A conveying belt is fixedly connected to the top of the supporting base, a scanner is fixedly connected to the inner side of the top of the supporting base, and a rotating motor is fixedly connected to the interior of the supporting base. The second driving sliding rail drives the supporting base to slide left and right, the storage drawers are conveyed by the conveying belt and scanned by the scanner to judge types and automatically classify the storage drawers, the first driving sliding rail is started to drive the conveying belt and the supporting base to the corresponding layers, the rotating motor drives the rotating column and the connecting supporting plate to rotate, and the suckers fix the drawers, so that the storage efficiency is improved; manual errors are reduced, and stability and reliability of the device are enhanced.