502 results about "Bidirectional transmission" patented technology

The invention relates to the technical field of synchronization in data communication, and provides a PTP protocol-based chip-level hardware timestamp generation method and system, and the method comprises the steps: 1, receiving a synchronization message and a delay request message from a main clock, carrying out the evaluation of a physical layer signal, and recording a first hardware timestamp; 2, responding to the received delay request message, generating and sending a delay response message, acquiring bidirectional transmission delay data by exchanging the delay request and the delay response message, and calculating clock skew in combination with the first hardware timestamp and the bidirectional transmission delay data; 3, adjusting the local clock frequency according to the clock skew; 4, after the synchronization is completed, associating the second hardware timestamp with the corresponding data message, and storing the associated data in a buffer area in the chip; and 5, generating standardized timestamp information, and outputting the standardized timestamp information through a chip interface. And high-precision time synchronization and timestamp generation are realized.

The invention provides a two-wheeled electric vehicle control system and method, and the system comprises a user side control platform which is used for detecting the operation of a user on a reverse turning handle, and generating a corresponding control instruction according to the pre-configured function setting; the communication module is used for bidirectionally transmitting instruction signals and vehicle state information in real time between the user end control platform and the vehicle end control system; and the vehicle end control system is used for receiving and analyzing the control instruction, judging the running or static state of the vehicle, executing kinetic energy recovery braking or driving mode switching in the running state, executing a reversing function or a self-defining function in the static state, and feeding back a vehicle execution result or vehicle state information through the communication module. The technical problems that in the prior art, the control function of a control terminal is single, the operation mode is not convenient enough, and the integration degree of the control terminal and vehicle functions is low are at least solved.

The invention discloses a distributed energy system source load coordinated optimization method based on a quasi-potential game method, and the method comprises the steps: constructing a distributed energy system model, inputting system parameters, and predicting renewable energy power generation and initial load demands. In a source side optimization stage, a leader layer potential function of a quasi-potential game is established by taking minimization of source side cost # imgabs0 # as a target, and an initial power generation plan is generated by comprehensively considering economical efficiency and carbon emission constraints; and then, based on a scheduling result, calculating a carbon potential epsilon t of each node and a dynamic carbon emission factor # imgabs1 # of each stage, optimizing a load side response based on an LCDR scheme, constructing a local potential function of a follower layer, reflecting a relationship between a user profit maximization target and carbon emission, and adjusting user behaviors through a distributed decision. And the updated load demand is fed back to the source side, and the source side optimizes the output plan of each unit based on the updated load, so that an iterative process of source side potential function optimization-load side equilibrium response is formed, and an optimal scheduling strategy and scheduling result of the energy supply side are obtained. According to the framework, the global consistency requirement of a traditional potential game is relaxed, independent optimization of source-load two sides under the guidance of respective potential functions is allowed, and a Nash equilibrium state is finally achieved only by ensuring monotonous convergence of total potential energy of a system in an iteration process. According to the method, the convergence advantage of the potential game is reserved, the method is also adapted to the characteristics of a source-load heterogeneous decision subject, efficient consumption of renewable energy and collaborative optimization of carbon emission are realized through bidirectional transmission of the carbon potential signal, and the overall efficiency of the system is remarkably improved.

The invention relates to the technical field of computational mechanics and geological disaster simulation, and discloses a full-process numerical simulation method suitable for simulating continuous medium damage to discontinuous medium movement. The invention provides a novel chain-type disaster simulation method for solving the problems that calculation efficiency and large deformation precision are difficult to consider at the same time and the evolution process of a slope from a continuum to a fragmented body cannot be dynamically reflected in the prior art. The core of the method is that a dynamic criterion is set based on a unit real-time damage variable, a failed finite element (FEM) unit is adaptively converted into smoothed particle hydrodynamics (SPH) particles, and the physical state of the particles is accurately mapped; and a virtual particle coupling algorithm is adopted to process a two-domain interface, so that bidirectional transmission of mechanical parameters is realized. The method is executed circularly, the whole process of'continuous deformation-fragmentation flow 'of the side slope is simulated dynamically, high-precision integrated simulation of a'seismic source-propagation-response-movement' disaster chain in the same frame is achieved, and an efficient tool is provided for disaster risk assessment and prevention and control.

The disclosure provides a method for improving the efficiency of a micro-inverter, and a dual-active-bridge-type micro-inverter. The method including: performing power modulation mode switching of a dual-active-bridge-type micro-inverter, such that the power is bi-directionally transmitted from a direct-current side to an alternating-current side and from the alternating-current side to the direct-current side, thereby reducing an effective value of a secondary side current of a transformer; and according to the modulation mode switching characteristic of the dual-active-bridge-type micro-inverter within a power frequency period, performing hybrid optimization on the turn ratio of a primary side to a secondary side and a transformer leakage inductance of a high-frequency transformer of the dual-active-bridge-type micro-inverter.

The invention provides an emergency broadcast playing method and system for disasters in an outdoor scene, and relates to the technical field of emergency broadcasts, cameras in a region are adopted to monitor the evacuation state of personnel in the outdoor scene in real time, and an emergency broadcast system and a rescue system are triggered through the evacuation state to perform linkage, so that bidirectional information transmission is realized; and the priority of the broadcast content played by the emergency broadcast is adjusted according to different instruction information in bidirectional information transmission, so that the broadcast content has pertinence, and rescue workers can receive key instructions.

The present invention involves method and system for contactless bidirectional transfer of power between DC source (3700) and rotor coils of electric motor-generator by simultaneous bimodal capacitive and inductive power transfer of high frequency power signals from resonators (3545) stationary with respect to the motor-generator stator to resonators (3585) on the motor-generator rotor according to an adjustable transfer mode ratio at a variable resonant power signal oscillation frequency. Power from DC source is converted into high frequency power signals by high frequency continuous auto-adjusting bimodal stator transmitter-receiver modules under control of systems controller (3572) and provided to corresponding one or more high frequency stator resonators. High frequency power signals received by high frequency rotor resonators are converted in corresponding high frequency auto-adjusting bimodal rotor transmitter-receiver modules to electrical signals to provide to drive circuitry of induction coils on rotor.

A power converter, includes: a first terminal, a second terminal, a third terminal and a fourth terminal; stored-energy-source terminals, to which a stored energy source can be connected; four inverter bridge branches, which are formed from semiconductor switching devices, the inverter bridge branches each having a center tap, each center tap being assigned to one of the terminals, and the inverter bridge branches being interconnected and controllable such that electrical energy can be transferred bidirectionally between the stored-energy-source terminals and the first terminal, the second terminal, the third terminal and / or the fourth terminal; and a control unit, which is designed to control the semiconductor switching devices of the inverter bridge branches.

The invention provides a rapid data acquisition method based on fusion of intelligent number asking and an industrial connection technology, and the method comprises the steps: obtaining industrial protocols of a plurality of devices and configuration parameters corresponding to the devices, and generating an acquisition model of each device; generating a structural fingerprint for each acquisition model; performing matching degree analysis on the plurality of acquisition models through multi-modal similarity calculation on the basis of the structure fingerprint, screening the plurality of acquisition models according to a matching degree analysis result to perform uniqueness management, and performing association mapping on the equipment and the corresponding acquisition model to obtain a de-duplicated acquisition model; edge gateway configuration accurate issuing of the collection model after duplicate removal is realized through a two-way transmission channel, and consistency is guaranteed by combining real-time structure fingerprint return and matching degree analysis. Through the AI-driven process arrangement and semantic understanding technology, the modeling efficiency, the information consistency and the issuing capability of the data acquisition system are remarkably improved.

The present invention provides a non-contact optical fiber sensing system and method. The system includes a passive fiber Bragg grating sensor and an active demodulation analyzer. The passive fiber Bragg grating sensor includes an optical fiber and a fiber Bragg grating sensor connected in series on the optical fiber. The active demodulation analyzer includes a laser light source, an optical circulator, and a demodulation analyzer. One end of the passive fiber Bragg grating sensor is connected with a first fiber collimator. The active demodulation analyzer further includes a second fiber collimator and an alignment mechanism. The laser light source is connected to the first end of the optical circulator for outputting an optical signal. The optical fiber led out from the second end of the optical circulator is connected with the second fiber collimator. The second fiber collimator is used for non-contact alignment with the first fiber collimator under the adjustment of the alignment mechanism so as to transmit the optical signal bidirectionally. The demodulation analyzer is connected to the third end of the optical circulator. The present invention can expand the application scenarios of the optical fiber sensing system and save costs.

The invention discloses an aircraft remote control delay compensation response method and system, and the method comprises the steps: obtaining airborne data, and constructing a multi-source data set; calculating bidirectional transmission delay based on a bidirectional delay estimation algorithm, and calculating initial total delay; the initial total delay is dynamically calibrated by using a self-adaptive delay calibration algorithm, the confidence coefficient is evaluated, and the delay precision is improved; deducing a flight state in a delay time period by adopting a delay deduction hybrid model, and dynamically adjusting parameters along with load; according to the deduction result and the original instruction, generating a compensation instruction containing constraints by using a model prediction control algorithm; and executing the instruction after onboard verification, comparing the actual state with the expected state, and feeding back a deviation value to optimize the weight of the next-round model so as to form a closed-loop lifting mechanism. According to the method, the problems of incomplete delay composition analysis, poor environmental adaptability, lack of constraint collaboration of compensation instructions, no closed-loop optimization mechanism and the like in the existing aircraft remote control delay compensation are solved.

The invention provides an atypical MOPA fiber laser device integration device, system and method. The device comprises an optical resonant cavity, a first device group and a second device group, wherein the first device group comprises a first amplification stage gain optical fiber, a first reverse pumping beam combiner, a first pumping source and a first cladding light stripper, and the second device group comprises a second amplification stage gain optical fiber, a second reverse pumping beam combiner, a second pumping source and a second cladding light stripper; the optical resonant cavity is used for receiving the pump light transmitted by the first amplification stage gain optical fiber and the second amplification stage gain optical fiber, transmitting the pump light which is not absorbed to the second amplification stage gain optical fiber and the first amplification stage gain optical fiber, and generating signal light under the action of the absorbed pump light; and the signal light is transmitted to the first amplification stage gain fiber and the second amplification stage gain fiber in positive and negative directions. The device number and the manufacturing cost are remarkably reduced, the light-to-light conversion efficiency and the system reliability are improved, and meanwhile high-power beam combination and miniaturization integration are facilitated.

The invention provides a communication delay detection and control method for ship remote control, and the method comprises the steps: embedding a high-precision timestamp in a control instruction and a data packet through a shipborne 4G / 5G dual-mode communication module and a shore-based monitoring center, and transmitting the high-precision timestamp; two-way transmission delay of the ship-shore communication link is measured based on the embedded timestamp, and the packet loss rate in a preset time window is counted; on the basis of historical delay data, a dynamic moving average method is combined with an adaptive Kalman filtering algorithm to predict a delay change trend in a future short period; judging the current communication state according to the bidirectional transmission delay, the packet loss rate and the predicted delay change trend; a sending strategy of the control instruction is adaptively adjusted according to the judgment result, or the ship-borne local intelligent controller is switched to execute autonomous risk avoiding control; an improved clock synchronization protocol is adopted regularly to calibrate a ship-shore clock, and timestamp synchronization precision is ensured. Through the synergistic effect of ship-shore clock synchronization optimization, instruction verification sequencing and other modules.

The invention relates to the field of data transmission, and provides a time series data cross-gatekeeper two-way transmission method, device and equipment, and the method comprises the steps: configuring an Internet of Things database cluster and an isolation gatekeeper, and determining a configuration result; according to the configuration result, the sending end is started to package the time sequence data, a data packet containing redundancy check information is generated, and the redundancy check information comprises a double-length field and a check code; transmitting the packaged data packet to a receiving end through an isolation gatekeeper; after the receiving end receives the data packet, verifying the dual-length field and the check code, if the verification is passed, returning a success signal, otherwise, returning a failure signal; and if the sending end receives the failure signal, automatically retransmitting the data packet until a successful signal is received or a preset retry condition is met. The problem that in the prior art, cross-gatekeeper time sequence data transmission cannot meet the requirements for high safety and real-time performance at the same time is solved, and safe and reliable time sequence data two-way real-time transmission under the strict network isolation condition is achieved.

The invention provides an intelligent control method and system for a body-equipped robot based on man-machine interaction data, and relates to the technical field of medical robots, and the method comprises the steps: building a 5G network two-way transmission channel between a control end and a surgical robot end; through a 5G network two-way transmission channel, synchronously transmitting two types of data streams between the control end and the surgical robot end, namely a control instruction data stream generated by the control end and a surgical image data stream collected by the surgical robot end; in the transmission process of the two types of data streams, real-time network time delay is continuously monitored, whether the current network time delay exceeds a preset time delay threshold value or not is judged, and the preset time delay threshold value can be dynamically corrected according to the network state; and when it is judged that the current network delay exceeds the preset delay threshold, dynamically deploying a plurality of network probes on the 5G network two-way transmission channel. According to the invention, the real-time performance, the accuracy and the safety of the remote operation can be ensured.

The invention discloses a multidirectional tray logistics conveying mechanism, and belongs to the technical field of logistics conveying. Comprising a rotating platform, a fixed circular plate is slidably connected to the outer side wall of the rotating platform, a plurality of supporting tables are fixedly connected to the outer side wall of the fixed circular plate, and a supporting column is fixedly connected to the center of the lower surface of the rotating platform; the rotatable rotating platform is arranged, the supporting tables with the second conveying devices are arranged on the outer side of the rotatable rotating platform, the limitation of one-way or two-way conveying of traditional tray conveying equipment is successfully broken through, and the rotating platform can be driven by the first motor to flexibly rotate in the face of complex warehouse layout or multi-process production processes; and the first conveying device is in butt joint with the second conveying devices in different directions, so that the trays are transferred in multiple directions, the flexibility of logistics route planning is greatly improved, the storage space is more fully utilized, and the problem of space waste caused by direction limitation of traditional equipment is effectively solved.

The invention relates to the technical field of non-cutting machining of metal plates, in particular to a bending integrated forming device and method for aluminum veneers, and the bending integrated forming device for the aluminum veneers comprises a workbench, a portal frame, bending modules with adjustable intervals, a bending structure, a rotating structure and an adsorption structure. The bending structure comprises a trapezoidal bending plate, a second bending plate and a first bending plate, and three-stage bending is achieved through synchronous movement driven by a bidirectional transmission mechanism. The rotating structure comprises a hollow rotating disc and a one-way bearing and is used for turning the plate by 90 degrees. The adsorption structure fixes a plate through a vacuum generation device; the forming method comprises the steps of plate placing and positioning, bending module pressing, negative pressure adsorption, multi-stage bending execution, module splitting and resetting, steering control and remaining edge bending. According to the scheme, multi-direction integrated bending of the aluminum veneer can be efficiently completed, grooving is avoided, and the product precision and strength are improved.

An arrangement is for increasing the range of an electrically driven vehicle combination. The arrangement includes a power adaptation and charging control unit for bidirectionally transmitting voltage between a first high-voltage battery of a towing vehicle of the vehicle combination and a second high-voltage battery of a trailer of the vehicle combination.

A bidirectional power supply apparatus includes: an alternating current input port for inputting an alternating current to the bidirectional power supply apparatus; an alternating current output port for outputting the alternating current to an alternating current device; a direct current input or output port for transmitting a direct current between the bidirectional power supply apparatus and a direct current device bidirectionally; a bidirectional energy conversion module for performing multiple energy conversions on electrical energy inputted to the bidirectional power supply apparatus; and a power management module electrically connected to the alternating current input port, the alternating current output port, and the direct current input or output port. The power management module is configured to control an energy conversion manner of the bidirectional energy conversion module according to a port connection status of the alternating current input port, the alternating current output port, or the direct current input or output port.

The invention belongs to the technical field of clock synchronization, and provides a clock synchronization device and a clock synchronization method of a distributed system. Wherein the distributed system comprises a master node and a plurality of slave nodes, the master node and the slave nodes are in two-way communication, and the clock synchronization device comprises a single-core optical cable, an optical switch and a double-frequency-mixing phase discriminator and is used for connecting the master node and the slave nodes; the optical switch is switched between a communication mode and a short circuit mode; when the optical switch is in a communication mode, the single-core optical cable is connected with the master node for transmitting and the slave node for receiving, or is connected with the slave node for transmitting and the master node for receiving; when the optical switch is in a short-circuit mode, the single-core optical cable is connected with transceiving of the master node or transceiving of the slave node; and the dual-mixing phase discriminator is used for measuring the phase difference between the local clock and the received data recovery clock. According to the invention, respective transmit-receive delays of the master and slave nodes and bidirectional transmission delays between the master and slave nodes can be obtained, the clock difference can be conveniently obtained according to the unidirectional transmission delays, and the synchronization precision is improved.

The invention relates to a series connection type balance control system, method and device between parallel battery clusters, the system comprises n battery branches which are connected in parallel, and each battery branch comprises a battery cluster, a positive adjusting element, a negative adjusting element, a positive bypass switch and a negative bypass switch, an energy two-way transmission unit is connected in series between one positive pole bypass switch and the other negative pole bypass switch in two adjacent positive pole bypass switches; and an energy two-way transmission unit is also connected in series between the nth positive pole bypass switch and the first negative pole bypass switch. The system makes up the electric quantity difference between the battery clusters through the mutual cooperation of the energy storage element group connected in series with the negative electrodes of the battery clusters and the bypass switch group connected in parallel with the energy storage element group, forms an SOC equalization path, does not involve a high-voltage direct-current bus, only uses a low-voltage energy bidirectional transmission unit, is low in power and low in cost, and improves the reliability of the system. The input and output of the equalization control energy two-way transmission unit can be freely set, and equalization control can be carried out between any two battery clusters.

The invention provides a portrait animation generation method and system based on a reversible encoder and dynamic optimization, and relates to the technical field of video portrait reconstruction, high-precision portrait animation generation is realized through multi-module collaborative innovation, multi-scale appearance features are extracted by using a VAE encoder, identity vectors extracted by ArcFace and global appearance embedding of CLIP are combined, and the portrait animation generation method and system based on the reversible encoder and dynamic optimization are realized. Constructing a multi-modal characteristic system; a high-precision attitude estimation algorithm is adopted to extract fine joint points, and an error between a generated attitude and an original attitude is calibrated in real time through a dynamic optimization strategy, so that the attitude driving accuracy is remarkably improved. A reversible residual block is designed to realize lossless two-way transmission of features, and the problem of information compression of a traditional encoder is avoided; a high-frequency detail injection mechanism is introduced, high-frequency features such as facial textures are extracted through a pre-training model and fused with shallow features, an attention mechanism guided by identity features is introduced based on the generation process of a diffusion model, and the consistency of character identities in the generation process is ensured.

The invention provides an interface data two-way transmission verification method for an HDMI (High Definition Multimedia Interface), which comprises the following steps: firstly, acquiring a two-way transmission data set of target equipment, including data packet sequences captured from two transmission paths which are opposite to each other, then, carrying out time feature alignment processing on the two data packet sequences to generate a two-way transmission time feature set, and then, carrying out verification on the two-way transmission time feature set; performing path consistency analysis on the bidirectional transmission time feature set based on a preset transmission path verification rule to generate a path verification parameter set, the path verification parameter set comprising key parameters such as path time sequence matching degree, data integrity index, transmission interruption frequency and the like; and according to a comparison result of the path verification parameter set and a preset transmission compliance threshold, generating a dynamic adjustment signal, and mapping the dynamic adjustment signal to a transmission configuration module of the target device to activate a transmission parameter updating operation. And finally, after the transmission parameters are updated, secondary verification operation is triggered, a final verification result set is generated, and improvement of transmission performance and stability is ensured.

The invention discloses a lithium battery electrothermal coupling SOC estimation method based on capacity dynamic correction. The method comprises the following steps: firstly, collecting current, voltage, surface temperature and environment temperature data under wide-temperature and multi-rate working conditions; then, an electrothermal coupling frame composed of a second-order RC electrical model and a lumped parameter two-state thermal model is constructed, and bidirectional transmission of electrical-thermal parameters is achieved; coupling parameters are identified on line by using a variable forgetting factor recursive least square method, temperature-multiplying power-capacity binary high-order polynomial dynamic mapping is constructed, and available capacity is corrected in real time; and finally, the correction capacity is taken as a reference, SOC is estimated through H infinity-AUKF joint, and non-Gaussian noise is suppressed. The corresponding system comprises a data acquisition module, a model construction module and the like, can be integrated in a BMS (Battery Management System), realizes SOC high-precision estimation under wide temperature and multiple rates, is suitable for an electric vehicle and an energy storage system, and has the advantages of capacity dynamic correction, electric heating bidirectional coupling, wireless parameter identification and high robustness of non-Gaussian noise.

The utility model provides a radioactive rabbit bidirectional pneumatic transmission system which comprises a first receiving and transmitting device, a second receiving and transmitting device, a transmission pipe, a sample box and an air supply mechanism, the transmission pipe comprises two sections of pipelines made of conductive materials and a section of pipeline made of insulating materials, and a magnet is arranged on the sample box. Through the arrangement of the gas supply device, the first receiving and transmitting device and the second receiving and transmitting device, two-way transmission of the sample box between the first receiving and transmitting device and the second receiving and transmitting device can be achieved in the using process, operation is easy and convenient, manual sample transportation is not needed, and harm of radiation to workers is greatly reduced; the hemispherical first air bags installed at the two ends of the sample box can guide the sample box when the sample box passes through the turning part in the conveying pipe, the sample box is prevented from being clamped at the turning part of the conveying pipe, meanwhile, the hemispherical first air bags can buffer the sample box when the sample box turns, and the impact force of the sample box on the inner wall of the conveying pipe is reduced.

The invention belongs to the field of acoustic particle control and surface acoustic wave devices, and aims to solve the problems of low efficiency, low precision and difficulty in realizing a complex space structure in traditional biological assembly. The invention provides an integrated programmable surface acoustic wave particle patterning control system. A first surface of a piezoelectric substrate is provided with an interdigital transducer area, a control area and other areas; the interdigital transducer is used for realizing two-way transmission of an electric signal and a sound signal through a piezoelectric effect so as to regulate and control a sound field pattern in real time; the upper computer is used for providing waveform data and a driving instruction required by the surface acoustic wave signal source board card, and the surface acoustic wave signal source board card generates resonant frequency required by the surface acoustic wave transducer based on the waveform data and the driving instruction so as to excite the surface acoustic wave device to perform particle control. The invention provides a new technical path for miniaturization, high efficiency and precision of biological assembly.

The invention discloses an intelligent security and protection system based on Internet of Things, which comprises an intelligent comprehensive wiring subsystem, an intelligent security and protection terminal group, an intelligent central management system and an emergency guarantee module, and is characterized in that the intelligent comprehensive wiring subsystem comprises a transmission link and a distributed sensing line, the transmission link is used for two-way transmission of security and protection data, and the distributed sensing line is used for sensing the security and protection data; the distributed sensing circuit is used for monitoring a vibration signal in the weak current pipeline; the intelligent security terminal group comprises an edge computing device and a multi-mode identification device, the edge computing device is used for processing sensing data in real time, and the multi-mode identification device is used for collecting biological characteristics and environment information. Physical parameters such as cable vibration, plugging strength, temperature and humidity are monitored in real time, millimeter-level fault positioning and second-level early warning are achieved, a traditional manual inspection mode is abandoned, and a double-link redundancy design is combined with an electromagnetic pulse protection module and shielding cable common bridge deployment.

The invention discloses an RTMP one-way proxy method, system and device based on one-way import equipment and a medium, mainly relates to the technical field of one-way proxy, and is used for solving the problems that in the existing scheme, the one-way flow of data is strictly limited, but a VPN (Virtual Private Network) needs to establish a tunnel through two-way communication, and the handshake process of an RTMP also depends on two-way transmission, so that the efficiency is high. The defect cannot be avoided in the prior art. Comprising a streaming media service relay module connected with RTMP stream pushing end equipment A, a one-way sending program connected with the streaming media service relay module, a one-way receiving program connected with the one-way sending program, and an analog terminal publishing module connected with the one-way receiving program. The system comprises a subscribed external network RTMP streaming media server, an analog terminal subscription module connected with the subscribed external network RTMP streaming media server, a one-way sending program connected with the analog terminal subscription module, a one-way receiving program connected with the one-way sending program, and an analog terminal publishing module connected with the one-way receiving program.

The application relates to a bidirectional output L2C3 resonant converter, which comprises two excitation sources and a resonant cavity, wherein the excitation sources are both half-wave bridge circuits; the resonant cavity comprises a transformer, three capacitors and two inductors; the primary winding of the transformer is connected in parallel with a resonant capacitor C p 1; the same end of the primary winding of the transformer is connected with a resonant capacitor C1 and an inductor L1 in series connection; the other end of the inductor L1 is connected with the connection point of the first excitation source and two switch tubes in series connection; the same end of the secondary winding of the transformer is connected with a resonant capacitor C2; the other end of the resonant capacitor C2 is connected with the connection point of the second excitation source and two switch tubes in series connection; the leakage inductor L g of the secondary winding of the transformer is used as a resonant inductor; the other ends of the same ends of the primary and secondary windings of the transformer are respectively connected with the negative poles of the direct-current power supplies of the corresponding excitation sources. Energy bidirectional transmission and synchronous rectification are realized through a brand-new circuit topology. All active switches can realize soft switching, and the working efficiency is improved. In an open-loop control state, the output current does not change with the change of a load, and the application is suitable for a bidirectional constant current working mode.

Provided is a gateway device provided between a control device that controls at least one first user terminal that performs single-core bidirectional transmission and at least one second user terminal that performs two-core transmission. The gateway device comprises: a plurality of main signal control signal multiplexing / demultiplexing units that demultiplex an input optical signal into at least main signal light and control signal light; and a plurality of control signal transceivers that transmit and receive control signal light between the at least one user terminal and the at least one second user terminal via at least one of the plurality of main signal control signal multiplexing / demultiplexing units. Each of the plurality of control signal transceivers includes an output unit that outputs uplink control signal light transmitted from the at least one first user terminal or the at least one second user terminal to an optical reception unit.