33results about How to "Expandable and flexible" patented technology

The invention discloses an extensible silicon-based terahertz radiation array source based on an on-chip micro-convex antenna and a terahertz radiation source. The extensible silicon-based terahertz radiation array source based on the on-chip micro-convex antenna comprises a plurality of array units formed by cross-coupled harmonic oscillators based on the on-chip micro-convex antenna, and the array units are connected to form the extensible silicon-based terahertz radiation array source of an n * n array structure. According to the extensible silicon-based terahertz radiation array source, the on-chip micro-convex antenna radiation structure meets the terahertz frequency and broadband requirements, the extensible silicon-based terahertz radiation array source can be applied to a terahertz radiation source system, and the terahertz radiation source array system which is high in working frequency, high in radiation power and tunable in broadband can be achieved.

The invention provides a high-power high-frequency modular battery cluster charging and discharging test device, which is characterized by comprising an alternating current coordination controller connected with a middle computer and used for receiving an instruction transmitted by the middle computer and distributing current to a plurality of isolated ACDC modules; the input ends of the plurality of isolated ACDC modules are connected in parallel and then are connected to the AC co-controller and a three-phase mains supply, and the output ends of the plurality of isolated ACDC modules are connected in parallel and then form a DC bus for converting AC into DC and realizing voltage isolation; and a plurality of BUCK-BOOST modules, the input ends of the plurality of BUCK-BOOST modules are connected in parallel and then are connected to the DC bus, and the output ends of the plurality of BUCK-BOOST modules are connected in parallel and then are connected to a target battery cluster for testing the charging and discharging of the target battery cluster. Modular design is achieved, efficient charging and discharging capacity is achieved, the defects that a traditional scheme is large in size, high in cost, slow in dynamic response and the like are overcome, equipment efficiency and flexibility are improved, and the device is suitable for a high-power scene.

The invention belongs to the technical field of network protocol stacks, and particularly relates to a method and a device for constructing an embedded network protocol stack based on Rust, common memory errors can be avoided by using the network protocol stack compiled by the Rust, a memory management mechanism of the Rust comprises an automatic recovery mechanism and an ownership system, the memory which is not used any more can be automatically released, and the reliability of the network protocol stack is improved. The common memory security problems of memory leakage, buffer overflow, repeated release and the like of the existing network protocol stack in an embedded system are solved, and the stability and the performance of the system are improved. The performance of the network protocol stack is optimized while the security of the memory is ensured, and the protocol stack is suitable for various embedded devices, especially in environments requiring high-reliability and efficient memory management. According to the network protocol stack, the memory security problem existing in a common network protocol stack is solved, and meanwhile, the effect which cannot be achieved by rewriting the network protocol stack only by simply using the Rust is achieved.

The invention provides a large-scale PLC communication method and system based on RapidIO and a shared memory technology. The large-scale PLC communication method comprises the steps that S1, a two-layer RapidIO network topology structure and a device module are constructed; the equipment module comprises a proxy communication module; the proxy communication module can undertake a bridging core network and a working area network, and caches all PLC point-to-point shared data in the system through a shared memory component; and S2, enabling the equipment module to use the two layers of RapidIO network topology structures to carry out large-scale PLC communication. According to the invention, the scene of large-scale PLC point-to-point data high-speed communication can be met, a RapidIO core network switch is omitted by adopting the first layer of annular core network structure, and effective data and the like are actively acquired from the shared memory through the PLC equipment in the working area, so that the performance requirement of the switch in the working area is reduced, and the investment cost is reduced for a user.

The invention discloses a high-degree-of-freedom multi-antenna structure with a decoupling function, and the structure comprises a rectangular metal patch array which is formed by uniformly distributing m * n rectangular metal patches with the same size at intervals according to m rows and n columns, every two adjacent rectangular metal patches in each row and every two adjacent rectangular metal patches in each column are connected through a switch, in an initial state, all the switches are in an off state, the number of antennas included in the high-degree-of-freedom multi-antenna structure is recorded as N, and N is a positive integer; the N antennas are constructed by selecting N columns of rectangular metal patches from the rectangular metal patch array as N antenna construction columns, and the decoupling structure is constructed from other columns of rectangular metal patches except the N antenna construction columns in the rectangular metal patch array; the method has the advantages that the degree of freedom of design and optimization is high, and flexible expansion can be achieved.

The utility model discloses a tray type cargo carrying four-way shuttle vehicle, which belongs to the technical field of cargo carrying, and is characterized in that the tray type cargo carrying four-way shuttle vehicle comprises a base, a shell is arranged at the top of the base, an adjustable tray assembly is arranged in the shell, and a telescopic rotary detection assembly is arranged on the front side of the shell; the adjustable tray assembly comprises a main tray fixedly connected to the top of the shell, and the problems that an existing tray type cargo carrying four-way shuttle vehicle is generally fixed in tray size and inconvenient to adapt to carrying of cargos of different specifications, so that trays need to be replaced when the cargos of different sizes are carried or the carrying efficiency is low due to the fact that the trays cannot adapt to the cargos can be solved. The problems that the existing tray type cargo carrying four-way shuttle vehicle generally has a fixed detection range and is inconvenient to comprehensively sense long-distance and short-distance obstacles in a complex storage environment, so that the obstacle avoidance is not timely or a detection blind area exists, and the running safety of the shuttle vehicle is influenced are solved in order to solve the problems that the existing tray type cargo carrying four-way shuttle vehicle is inconvenient to comprehensively sense the long-distance and short-distance obstacles in the complex storage environment.

The invention relates to the technical field of cargo transfer, in particular to an automatic connection transfer system and a connection transfer method. The invention provides an automatic connection transfer system. The automatic connection transfer system comprises a transfer frame; the unmanned aerial vehicle connection unit is arranged on the upper portion of the transfer frame and used for receiving the freight unmanned aerial vehicle or goods airdropped by the freight unmanned aerial vehicle or conveying the goods to the unmanned aerial vehicle. The unmanned vehicle connection unit is arranged on the lower portion of the transfer frame and used for being in butt joint with an unmanned vehicle and taking and placing goods. The transfer mechanism is arranged in the transfer frame and used for taking goods from the unmanned aerial vehicle or the unmanned aerial vehicle and conveying the goods to the unmanned aerial vehicle or the unmanned aerial vehicle. According to the invention, full-automatic and seamless connection and rapid transfer of goods from an aerial unmanned aerial vehicle to a ground unmanned vehicle or other unmanned aerial vehicles, or from the ground unmanned vehicle to the unmanned aerial vehicle are realized, and the connection efficiency and reliability are greatly improved; on-site deployment is greatly simplified, facility complexity and construction cost are reduced, and a key standardized unit is provided for constructing a high-density and flexibly-expandable urban low-altitude logistics connection network.

This invention relates to the field of wine cabinet technology, specifically to an island wine cabinet with an independent island structure and at least two doors on the side walls opening in different directions for convenient multi-directional access. Its direct cooling and heating circulation system switches the refrigerant flow direction via a four-way valve, enabling the same system to switch between cooling and heating modes. The top functional module and the direct cooling and heating circulation system are electrically and signal-connected to the cabinet via quick-plug interfaces, forming a modular, pluggable structure. The intelligent control system monitors the chamber temperature through temperature sensors, and the main control unit dynamically adjusts the operating power of the top functional module and the direct cooling and heating circulation system accordingly, achieving coordinated operation. Compared with existing technologies, this invention integrates professional temperature control, multi-directional access, modular expansion, and coordinated control, realizing the fusion of wine storage, cooking, and social scenarios, significantly improving space utilization, ease of use, functional customization capabilities, and energy efficiency.

The present invention discloses a cave monitoring system capable of controlling initial conditions, including a simulated precipitation module, a karst system and a monitoring system framework. The simulated precipitation module is composed of a pump room, a precipitation pipeline and a precipitation control system, which can realize personalized precipitation environment settings and provide support for diversity research needs; the karst system is divided into multiple subsystems, each of which includes a soil layer, a bedrock layer and a cave layer. The land cover type is simulated by adjusting the composition of the overlying vegetation, the hydrogeological background is simulated by adjusting the type and composition of the soil and bedrock, and the ventilation effect is simulated by adjusting the cave exhaust equipment; the monitoring system framework adopts reinforced concrete to provide a stable support for the system and separate the subsystems. The advantages of the system are highly accurate environmental simulation, real-time monitoring of multiple parameters, flexible and customizable experimental design and scalability, and it is expected to be widely used in a variety of related experimental fields.

The invention provides a supply chain multimodal transport intelligent data system and method, and belongs to the technical field of supply chain management. The invention provides a supply chain multimodal transport intelligent data system. The system comprises a unified data base module, a core calculation engine module, an intelligent decision engine module, a hierarchical alarm response module and a closed-loop optimization module. The unified data base module is used for accessing multi-source heterogeneous data and cleaning, standardizing and fusing the multi-source heterogeneous data to form a global unified data view; the core calculation engine module is used for performing data processing and feature extraction on the global unified data view; the intelligent decision engine module is used for carrying out prediction analysis on the extracted feature data and generating a prediction result and a risk score; the grading alarm response module is used for comparing the risk score with a preset threshold value, triggering an alarm and executing grading response; and the closed-loop optimization module is used for returning feedback data generated by execution and intervention to the unified data base module.

The application discloses a kind of based on thing networking's wisdom building energy consumption management and equipment monitoring system, belong to building intelligent management technical field.System uses layered distributed architecture, is composed of perception layer, network transmission layer, edge computing layer, platform application layer, terminal control layer;Perception layer realizes energy consumption, equipment, environmental global data acquisition, network transmission layer uses wired wireless dual-mode communication to guarantee data transmission, edge computing layer realizes local instant processing and emergency control, platform application layer realizes cloud big data analysis, visual management, intelligent strategy generation, terminal control layer realizes equipment automation regulation and control.The application overcomes the defects of traditional building management energy consumption waste, operation inefficiency, data isolation, insufficient intelligence, can realize building energy consumption accurate measurement, dynamic analysis, intelligent regulation and control, equipment full period monitoring, fault early warning, automation operation, effectively reduce building energy consumption, reduce operation cost, improve operation safety, applicable to various office buildings, shopping malls, communities, parks and other buildings, with excellent novelty, creativity and practicality, meet the development needs of green low-carbon building.

The invention discloses an addressing ultrasonic sensor array variable aperture excitation impedance matching method and circuit, and belongs to the technical field of ultrasonic detection. The invention provides a voltage gain compensation method based on an excitation sound field energy attenuation principle according to array element impedance change during addressing array variable aperture excitation and excitation sound field energy distribution difference. According to the method, the waveform parameters of the excitation signals can be automatically adjusted, the energy distribution of the excitation sound field is optimized, and the consistency of the ultrasonic excitation signals is improved, so that the optimal excitation of the array elements of the addressing ultrasonic sensor array under different excitation apertures is realized. According to the invention, distribution characteristics of excitation circuit impedance under different apertures are given, and a variable aperture array element impedance matching circuit is designed. The circuit system comprises an adjustable high-voltage circuit, a driving circuit, a sharp pulse excitation circuit and an array element impedance matching circuit. According to the invention, the addressing ultrasonic sensor array can achieve the optimal impedance matching effect in different aperture array element excitation modes.

The utility model discloses an adjustable cement transfer device for engineering construction, which relates to the technical field of engineering construction and comprises a sweeping board, a driving wheel set, a control wheel set, a storage battery pack and a control handle. Through the cooperative use of the cart plate, the adjusting device, the expansion assembly, the movable supporting assembly, the linkage control piece, the limiting fence and the anti-skid grains, the problems that the cart plate area of an existing electric flat cart for engineering construction is mostly of a fixed structure, and the width and the supporting range of the bearing face cannot be flexibly adjusted according to the actual transfer requirement are solved; when a plurality of cement bags are arranged side by side or stacked to improve the transfer efficiency, part of the cement bags easily exceed the edge of a trolley plate, effective lateral support is lacked, the ground of a construction site is too uneven, the cement bags on the edge are prone to slipping off due to unstable stress due to jolting in the running process of the trolley, the cement bags are damaged and wasted, and the labor intensity of workers is reduced. And constructors may be stumbled due to falling cement bags, and meanwhile, the transfer efficiency is also reduced.

This invention belongs to the technical field of switch quantity acquisition devices, specifically relating to a switch quantity acquisition and synthesis device. The invention includes an embedded monitoring host, which establishes a bidirectional data connection with the switch quantity acquisition and synthesis module through a main communication module; the embedded monitoring host receives and parses the switch signals acquired by the switch quantity acquisition and synthesis module in real time; the embedded monitoring host is connected to a display module, which dynamically displays the open / closed status and alarm status of each switch; the embedded monitoring host transmits switch fault signals to a lower-level monitoring host through the main communication module; and a data processing unit, with a built-in analog-to-digital conversion circuit and protocol conversion chip, is connected to the embedded monitoring host through the main communication module. This invention features a simple structure, convenient wiring, high integration, high reliability, good scalability, and low cost.

The application discloses a cold atom gravity measurement system and method based on a planar magnetic well and a mirror surface atom chip. In view of the deficiencies of the existing reflection type atom chip in the aspects of integration, energy consumption and atom control efficiency, the application introduces a planar magnetic well and a mirror surface atom chip, effectively reduces the system manufacturing cost, improves the space utilization efficiency, optimizes the chip energy consumption structure, and significantly enhances the efficiency and purity of atom capture. The system has significant advantages in the aspects of atom control performance and integrated design, specifically, high-efficiency atom cooling and capturing capacity, low power consumption, low noise, good detection and coupling characteristics, and excellent scalability, and provides a high-precision solution with a more compact structure, more stable performance and suitability for practical application for cold atom gravity measurement.

The invention relates to a vehicle-mounted full-localization heterogeneous acceleration device, and belongs to the field of computer hardware technology and computer application. The device comprises a case, an ATCA (advanced telecom computing architecture) blade (4), a GPU (graphics processing unit) acceleration blade (5), an intelligent acceleration blade (6) and three power panels (1, 2 and 3). Compared with a traditional VPX isomorphic computing service platform based on a domestic CPU and a double-path S5000C / 32 processor design adopted under an ATCA architecture, the universal computing power is doubled, in quality computing application of a multi-target (the number of targets is larger than 4000) track, the designed heterogeneous acceleration device has the advantages that the computing time is greatly shortened compared with CPU multi-thread computing, and the speed-up ratio exceeds 100; nationwide software and hardware design, a domestic chip, firmware and an operating system are adopted, and the risk that foreign technologies depend on is avoided.

This invention relates to a method and apparatus for data offloading and access processing via a gateway device. The gateway device includes a data exchange area and at least one serial communication interface. The data exchange area includes an uplink data area, which in turn includes a mapping sub-area. The method includes: S11, receiving a first write request sent by a first field device through its host communication interface; S12, if a first address points to the data exchange area, determining the target mapping sub-area corresponding to the first data information according to a first function code; S13, determining the target allocation operation for the first data information according to a routing policy pre-configured in the data exchange area. This invention enables existing field devices to proactively report, store, or forward data without changing hardware settings, achieves logical isolation of business data within the gateway, changes the traditional gateway's periodic polling mode, supports data classification storage and processing, and significantly improves the effective utilization rate of bus bandwidth.

The utility model discloses a battery box fire extinguishing device and vehicle battery system and fork truck, including fire extinguishing host computer, first control valve and second control valve, and fire extinguishing host computer is equipped with fire extinguishing agent output port, first control valve is equipped with first import, always with first import intercommunication's first export, the second export of switchable on-off, second control valve is equipped with second import, the third export of switchable on-off, first control valve is equipped as one time, and fire extinguishing agent output port intercommunication first control valve's first import, and first control valve's first export intercommunication second control valve's first import, when first control valve is equipped as multiple, and multiple first control valve series connection forms multistage flow path, wherein, first import intercommunication fire extinguishing agent output port of first stage, and first export intercommunication second import of last stage, and through first export of former stage intercommunication first import of latter stage between adjacent stage. When the number of battery box changes, only need to adjust the number of first control valve accordingly, namely can complete system expansion or simplification quickly.

This application provides a high-voltage pulse modulator and its control method, including a power supply module, an inductor, a main circuit switch, N pulse modules, and a load. The power supply module is grounded sequentially through the inductor, the main circuit switch, and the load. The inductor is also connected sequentially to the N pulse modules. Each pulse module includes a diode, a capacitor, a bottom loop switch, a MOSFET series branch, and a current-sharing switch. The advantage is that by adopting a modular design of "overall series connection and partial parallel connection" and introducing controllable switches to control the switching of different circuits, multi-level charging and discharging can be achieved, allowing the output voltage to be flexibly adjusted over a wide range to meet the needs of different application scenarios.

The utility model relates to a compressed video stream decoding and transmitting device, belongs to the technical field of multimedia, and solves the problems of high energy consumption and high cost caused by the fact that compressed video streams need to be locally decoded and displayed by a display terminal in the prior art. The device comprises an optical fiber channel video decoding unit, a network switch and a plurality of optical fiber channel display terminals, the optical fiber channel video decoding unit comprises a plurality of optical fiber channel video decoding modules; each optical fiber channel video decoding module comprises a video decoding circuit and an FC controller; the video decoding circuit is connected with the network switch through the Ethernet, and the FC controller and the display terminal are connected with the network switch through an optical fiber channel. Hard decoding of the compressed video stream is realized, energy consumption is reduced, cost is saved, and system expansion is flexible.

The application provides a water mixing station heat supply control method and system, relates to the heat supply control technical field, and the method of the application utilizes a heat load prediction model to process external environment parameters, current heat supply operation parameters and historical heat loads, obtains predicted heat loads, calculates secondary network target total flow according to the predicted heat loads, and generates variable frequency control instructions, so that the output flow of the secondary circulating pump dynamically matches the predicted heat loads, thereby realizing real-time following of the secondary circulating pump flow to the user heat load, avoiding invalid flow caused by fixed frequency operation at low load, effectively reducing the redundant energy consumption of the heat supply system, and solving the energy waste problem caused by fixed frequency operation of the circulating pump in the prior art.

This invention discloses a material buffer module for a multi-region synthesis system, applied to an AI-based automated synthesis platform with switchable operating modes. The module includes a buffer chamber, a flow rate sensing unit, a flow regulation unit, an inlet / outlet interface unit, and a buffer control module. Through the cooperation of a retractable buffer chamber and a high-precision flow rate sensing unit, and the dynamic decision-making of the buffer control module based on multi-parameter data and AI commands, the module can accurately match the material flow rate upstream and downstream or within a region in real time, completely solving the problems of material accumulation or supply interruption. Through modular design and standardized quick-connect interfaces, and intelligent linkage with a central scheduling and AI system, the module can seamlessly adapt to rapid switching between autonomous and global collaborative modes. By integrating multi-parameter collaborative monitoring and closed-loop control algorithms such as pressure and liquid level, and employing a PTFE anti-corrosion coating and dynamic sealing structure, the stability of the synthesis process and the purity of the product are ensured.

The invention discloses a six-shaft simple electric control speed change taper clutch type electric driving system which comprises a power input mechanism, a speed change assembly and a two-shaft power output mechanism, and the speed change assembly comprises a main shaft, a speed reduction shaft assembly, a reverse gear shaft mechanism, a taper clutch mechanism and an elastic mechanism. The power input shaft, the speed reduction shaft assembly, the reverse gear shaft mechanism and the two-shaft power output mechanism are arranged on the periphery of the main shaft in the circumferential direction. And the structure is simple and reliable, the expansibility is excellent, and various functional modules such as human-controlled reversing, inertial reversing and active upshift and downshift according to real-time power can be flexibly expanded according to actual requirements. The motor can always and efficiently keep working in the current high-efficiency area according to the change of the driving intention, a multi-parameter control strategy with the consciousness and intention of people as priority is achieved, and harmony and unification of people, vehicles, roads and running resistance / running loads are achieved. The important scientific and engineering technology common key problem of traction / driving force-running resistance / load efficient and accurate balance control is solved.

The utility model relates to the field of filter materials, and particularly discloses a filter pipe unit cluster, which comprises a plurality of filter pipes, a head part and a support plate, the outer side of one end of each filter pipe is fixedly connected with a flanging flange, and the other end of each filter pipe is fixedly connected with an end socket; the bottom of the flanging flange and the upper surface of the head are bonded and fixed through an inorganic binder, and the supporting plate is bonded and fixed to the outer sides of the filter pipes through the inorganic binder; through the modularized replaceable design, the connecting compensation rod vibration reduction structure and the inorganic binder fixing technology, on the basis that the original advantages of high-temperature resistance, corrosion resistance and the like of the ceramic filter pipe are reserved, the industrial problems that a single pipe is high in maintenance cost and poor in vibration resistance are successfully solved, and the service life of the ceramic filter pipe is prolonged. The device is especially suitable for high-vibration and high-corrosion working condition scenes needing long-term continuous operation such as thermoelectricity and chemical engineering, and the economical efficiency and the reliability are remarkably improved.

This utility model discloses an air supply system, which includes a main pipe and at least two sets of air supply units. Each air supply unit includes an air compressor and a dryer. A first branch pipe is provided connecting the air compressor and the dryer, and a second branch pipe is connected in parallel with the first branch pipe. The main pipe is sequentially connected to the air supply units. When one air compressor or dryer fails, the equipment in other air supply units can continue to work. If the air compressor of one air supply unit fails, the air compressors of other air supply units can continue to supply air to the dryer of that air supply unit through the main pipe. This avoids the entire system from shutting down due to a single equipment failure, reduces downtime caused by equipment maintenance or failure, improves the overall operating efficiency of the system, avoids the situation of some equipment operating under overload for a long time in the traditional one-to-one single-pipe mode, and improves the output quality of compressed air.

The utility model discloses a quick locking and anti-loosening of shell is realized through the rotary joint structure of front cover and rear cover, and the assembly is reliable. The innovative claw slide and the design of the buckle hole of the buckle arm make the installation frame containing the control panel and the battery compartment cover can be quickly disassembled and assembled with the main body without tools, and the degree of modularization is high, which greatly improves the production, maintenance and replacement efficiency. The shell adopts a honeycomb ventilation surface, effectively optimizes the airflow channel, reduces wind resistance and turbulence, and improves the stability and efficiency of air supply. The motor slot is recessed in the center of the rear cover, combined with the split battery compartment design, making the structure more compact and the weight distribution more optimal, especially suitable for cap wearing scenes. In addition, this design supports flexible installation methods and functional expansion, successfully solving the problems of low assembly efficiency, inconvenient maintenance, poor airflow and poor expansion of traditional fans.

The present invention provides a method and system for implementing a foldable fault isolation domain in a distributed storage system, comprising the following steps: obtaining metadata of each storage unit, generating an original weight according to the metadata; generating a new weight for each storage unit based on the original weight and allocation strategy, and generating a view according to the metadata and the new weight, wherein the view includes a top layer, a second top layer, and a bottom layer; judging whether the storage space of the top layer of the view satisfies the maximum redundancy of the data cluster; if so, assigning the data cluster to the top layer; otherwise, using a folding mechanism to fold the data cluster; if the redundancy of the data cluster after folding is less than its minimum redundancy, the allocation fails, and the redundancy judgment is performed again by switching to the second top layer of the view until the judgment result is satisfied. The beneficial effects of the present invention: while ensuring data security, it can reduce unnecessary storage overhead, and ensure data availability and accessibility even if some storage nodes fail.

The utility model relates to bamboo shoot dry processing technical field discloses a kind of bamboo shoot dry air-drying storage equipment, including mounting seat and connecting seat, the connecting seat upper end is provided with air-drying mechanism, the air-drying mechanism includes connecting rod, the connecting rod outside lower end is rotatably provided with carousel, the carousel upper end is fixedly provided with fan by front end, the connecting rod lower end is fixedly provided with mounting block, the connecting rod outside is fixedly provided with multiple placing rods, multiple the placing rod outside is fixedly provided with multiple partition blocks, multiple the partition block lower end is fixedly provided with spray head, the connecting seat inside lower end is rotatably provided with worm gear. In the utility model, by plug-in type fixing rod, connecting groove design, so that installation process can be quickly completed equipment assembly and module expansion without tool, shorten installation debugging time, and modular structure supports on-demand superposition, can flexibly adjust equipment capacity, and the air-drying effect of bamboo shoot is accelerated by the wind that spray head sprays.

The present invention discloses a motor control kernel and control method based on RISC-V, including a RISC-V kernel, wherein a current loop controller, an iPark coordinate converter, a Park coordinate converter, a Clarke coordinate converter, an SVPWM space vector modulator, a sliding mode observer and a phase-locked loop are arranged in the RISC-V kernel; a main processor CPU, a three-phase inverter and a motor are arranged outside the RISC-V kernel, and the main processor CPU includes a position loop controller and a speed loop controller. The motor-specific kernel using the RISC-V architecture can not only solve the problem of limited frequency of the existing motor software control algorithm, but also avoid the problems of high expansion cost and complex design existing in other kernel architectures, making the motor control more specialized and convenient.

The invention discloses a four-mode mode division multiplexing demultiplexer based on a Y branch and a multimode interference coupler, the four-mode mode division multiplexing demultiplexer comprises a four-mode multiplexer and a four-mode demultiplexer, and the four-mode multiplexer and the four-mode demultiplexer realize multiplexing of four conduction modes through a four-mode bus waveguide. The four-mode multiplexer and the four-mode demultiplexer are of mirror symmetry structures, and each of the four-mode multiplexer and the four-mode demultiplexer is composed of a dual-mode Y-shaped waveguide, a four-mode Y-shaped waveguide, a 2 * 2 single-mode input pairing interference type MMI basic unit and a 2 * 2 multi-mode input general interference type MMI basic unit. Four-mode multiplexing and demultiplexing are realized through mode phase control in the Y-shaped waveguide and the MMI multimode coupler, and the four-mode mode division multiplexer and the demultiplexer have the characteristics of low loss, large bandwidth, small size and large manufacturing tolerance.