266 results about "Ethernet communication" patented technology

This invention provides a method, apparatus, electronic device, and readable storage medium for redundancy control in ring network communication, relating to the field of vehicle-mounted communication. The method includes: controlling nodes in the vehicle-mounted ring network system to detect abnormal Ethernet link states and broadcast these states via CAN communication; a master control node can determine whether to switch redundant links based on the relevant link abnormal states of each node; if switching is required, a switching control message is broadcast via CAN communication; and each node can adjust its port settings based on the switching control message. By implementing Ethernet link detection and redundant link switching control based on Ethernet communication itself, and by integrating the functions of determining whether to switch links based on abnormal link states and broadcasting switching control messages into the master control node, the requirements for nodes other than the master control node are reduced. This lowers the hardware resource requirements of the vehicle-mounted ring network communication redundancy control scheme compared to existing solutions, making it simpler, easier to implement, and more usable.

The invention relates to the technical field of Ethernet communication and digital information transmission, and discloses an Ethernet-based time synchronization acquisition method, device and equipment and a medium, and the method comprises the steps: obtaining initial network time based on a network time protocol and a precise time protocol; recovering the synchronous clock signal from the Ethernet physical layer signal and generating a trigger pulse signal aligned with a second boundary to generate second-level reference time; the trigger pulse signal and the synchronous clock signal are used for executing high-frequency counting accumulation to generate nanosecond-level fine time; performing frequency division processing on the synchronous clock signal based on the sampling rate configuration parameter to obtain a sampling driving clock; the analog-to-digital conversion unit is triggered at the effective jump edge of the sampling driving clock to sample and latch nanosecond-level fine time to generate a sampling timestamp, and the sampling timestamp is output in combination with sampling data. According to the method, time recovery, time refinement and sampling time locking are realized through a unified time base, so that sampling action and time counting are accurately aligned, and the data synchronization precision and consistency of distributed acquisition nodes are improved.

The invention discloses a security-level DCS redundant communication system, a communication method, equipment and a medium, and relates to the technical field of communication. The system comprises a first TU control station and a TU control station executing a gateway function, wherein the TU control station executing the gateway function comprises a second TU control station and at least two Ethernet communication modules arranged on a main control box backboard of the second TU control station; wherein the first TU control station and the second TU control station are in communication connection through a one-way receiving link, and the Ethernet communication module adopts a parallel working mode and respectively establishes communication connection with a non-security-level DCS side gateway to form a redundant communication link between the TU control station executing a gateway function and the non-security-level DCS. Redundant communication and fault link switching under the condition that a non-security-level DCS does not need to be transformed are achieved.

The invention discloses an intelligent spraying system and method for a coal mine stopping agent, and relates to the field of coal mine safety. Comprising a programmable controller, an electromagnetic controller, an audible and visual alarm, a flow meter, a pressure transmitter, a temperature sensor, a vibration sensor, a liquid level transmitter, a stopping agent concentration sensor, a stopping pump, a scraper feeding machine, a liquid tank and an electric ball valve set which are all connected with an underground industrial ring network switch. The ground server is connected with the ground industrial ring network switch; the ground industrial ring network switch is connected with the underground industrial ring network switch through an Ethernet communication line; the scraper feeding machine is communicated with the premixing tank through a feeding pipeline; the premixing tank is communicated with the liquid tank through a conveying pipeline; one end of the inhibition pump communicates with the liquid tank, and the other end of the inhibition pump communicates with the electric ball valve set through a main pipeline so that ground remote monitoring and underground inhibitor preparation spraying control can be conducted. In order to solve the problem that existing inhibitor spraying and fully mechanized coal mining face operation procedures are not synchronous, automatic spraying accurate control and real-time monitoring are achieved.

The invention provides an Ethernet communication test method, device, system, equipment and medium, and relates to the technical field of rail transit, the method comprises the following steps: after an Ethernet communication link between display equipment and a train control unit is established, receiving a first input signal of a user on a communication control interface of the display equipment; sending a first input signal to the train control unit through the switch, and receiving response data from the train control unit; the response data is determined by the train control unit according to the communication identifier to be inquired and the first offset parameter; analyzing the response data to obtain an original byte sequence, a bit-level analysis result and a physical meaning, and displaying the original byte sequence, the bit-level analysis result and the physical meaning on a data monitoring interface of the display equipment; performing real-time verification on the response data, marking abnormal data and recording an abnormal occurrence moment; and generating a first test result based on the exception data, the exception occurrence moment and the response data. According to the scheme, the accuracy of network display screen interface troubleshooting and port consistency testing is effectively improved.

The invention discloses an online one-stop new energy power station rapid power regulation portable test system. The system comprises a multi-core processor and a data acquisition device. The data acquisition equipment acquires three-phase voltage and three-phase current analog quantity, signal analog quantity and external trigger calibration signal input quantity of a power grid, and outputs AGC / AVC remote regulation signal output quantity; the multi-core processor comprises test software, an Ethernet communication interface and a USB (Universal Serial Bus) interface; the test software comprises a test function selection module, a data acquisition and storage module, a digital filtering module, a signal frequency measurement and amplitude measurement module, a power calculation module, an AGC / AVC communication module and a test result analysis and report automatic generation module. The system fully considers the diversity of field test schemes according to the high automation and portability requirements of the new energy power station rapid power regulation field test, has the characteristics of online one-stop, portability, high compatibility and the like, and provides an efficient and accurate test scheme for the new energy power station rapid power regulation.

For security reasons, a one-way Ethernet communication link is implemented to segregate edge devices for an autonomous vehicle (AV) from the AV compute system. A non-feature rich backchannel allows very limited amounts of data to be transmitted from the edge devices side to the AV compute side. It is a challenge to query information about the edge devices when the backchannel only allows enumerated type data values to be transmitted. To address this concern, the customer-facing access point includes a relay endpoint that operates as a proxy to a web server that manages the edge devices and encodes responses as enumerated type data values to be transmitted over the backchannel.

The embodiment of the invention provides a method, a device and a computer readable medium for automatically measuring service interruption time of point-to-point or multi-point Ethernet service during path switching. In the method, a first device detects a continuity loss defect (dLOC) based on a CCM set to determine a first timestamp indicating a start of a service interrupt and a second timestamp indicating an end of the service interrupt. The first device then sends the first timestamp and the second timestamp to the second device. The second device determines a service interruption time of the multipoint Ethernet service based on the at least one first timestamp and the at least one second timestamp received from the plurality of first devices. Alternatively, the apparatus detects a continuity loss defect (dLOC) or a remote defect indication defect (dRDI) based on the CCM set, and determines a first timestamp indicating a start of the service interruption, and a second timestamp indicating an end of the service interruption, thereby determining a service interruption time for the multipoint Ethernet service.

The application relates to an Ethernet node data sending method based on a hybrid network of Ethernet and FC-AE-1553, belongs to the technical field of FC-AE-1553 and Ethernet hybrid network communication, and solves the problems of complex FC-AE-1553 and Ethernet communication network structure, large volume and high cost in the prior art. The Ethernet node data sending method comprises the following steps: receiving an Ethernet data frame sent by a source Ethernet node, determining the node type to which a destination node of the Ethernet data frame belongs; if the node type to which the destination node belongs is an FC-AE-1553 node, analyzing the Ethernet data frame to obtain all valid data contained in a data packet and determining whether the destination node is an NC node or an NT node; encapsulating the valid data contained in the data packet according to an FC-AE-1553 protocol format to obtain a command data sequence or a state data sequence corresponding to the data packet, and sending the command data sequence or the state data sequence to the destination node. Data transmission from Ethernet to FC-AE-1553 is realized.

The utility model discloses a control system for a wet-method pulverizing production line, which relates to the technical field of mechanical pulverizing equipment and comprises an industrial personal computer and an industrial router connected with the industrial personal computer through Ethernet communication. The jaw crusher control component, the cone crusher control component, the transfer stock bin control component, the double-roller flour mill control component, the vibrating screen control component, the separating tower control component, the magnetic separator control component, the second dewatering screen control component and the first conveying belt control component are connected with the industrial router through Ethernet communication. A first conveying belt control component, a second conveying belt control component, a third conveying belt control component, a fourth conveying belt control component, a first conveying pump control component and a water spraying device control component; the device has the characteristics that the device is convenient to operate and control, one-key start, one-key stop and one-key sudden stop of the whole line can be realized, and the operation data of the whole line can be automatically stored; the device is matched with a wet-method pulverizing production line and is suitable for preparing mineral powder such as quartz sand powder, dolomite powder and calcium carbonate powder.

The invention provides an industrial field instrument communication system, an industrial field instrument and a communication method thereof. The industrial field instrument communication system comprises: a processing unit for processing sensor data and generating a main process variable; the analog output module is connected with the processing unit and used for converting the main process variable into an analog current signal of a first specification and outputting the analog current signal to a two-wire system current loop; the HART modulation-demodulation module is used for superposing a low-frequency FSK digital signal on the analog current signal; the digital communication module is connected with the processing unit and comprises a physical layer adaptation unit, and the physical layer adaptation unit is used for supporting at least two Ethernet physical layer standards with different electrical specifications and rates; wherein the analog current signal and the Ethernet digital communication signal of the digital communication module can be simultaneously and independently transmitted on respective physical media. The industrial field instrument communication system disclosed by the invention can be compatible with Ethernet communication while reserving the existing infrastructure.

The invention discloses an Ethernet communication system based on MicroBlaze and a data transmission method. The system comprises a MicroBlaze processor, an Ethernet UDP (User Datagram Protocol) stack module, a cross-clock domain transmission module, an AXI-Stream FIFO (First In First Out) module and a composite bit width conversion module. The MicroBlaze drives each module through an AXI bus, intervention of a DDR controller and DMA is not needed, deviation between a processor clock and an Ethernet clock is eliminated through asynchronous FIFO, and data integrity and transmission stability are ensured; and the composite bit width conversion module adopts a five-stage pipeline processing architecture and is used for synchronously realizing splitting and merging of 32-bit and 8-bit Ethernet data, zero value filling and data alignment. The invention constructs a DMA / DDR-free architecture with less resource occupation and low transmission delay, realizes stable and reliable Ethernet transmission on an FPGA platform, and is suitable for the field of industrial control with strict real-time requirements.

The invention discloses a high-speed Ethernet communication node secondary queue message receiving method and a high-speed Ethernet communication node secondary queue message receiving system, which enable a high-speed Ethernet communication node to send messages by adopting multiple links, improve independence among subsystem applications in a multi-core and multi-task scene, avoid mutual exclusion operation of critical resources of a sending queue, and improve the service life of the high-speed Ethernet communication node. The execution efficiency of a message sending interface is optimized, and the network throughput rate and the network bandwidth of the high-speed Ethernet can be developed; the blocking operation of each partition application in the partition system caused by the message sending access sending queue and descriptor is effectively avoided, the execution time of the partition application message sending is further optimized and improved, the receiving buffer area is managed by adopting the receiving idle FIFO queue, the receiving buffer area does not need to be dynamically managed by applying for a large buffer pool, and the message sending efficiency is improved. Therefore, the overhead of memory resources is reduced, and the system overhead caused by applying or releasing the receiving buffer area is also avoided; and the network communication bandwidth and throughput are improved, and the capacity expansion and speed increase of the network are facilitated.

The application provides a vehicle-mounted Ethernet communication plug-in. The plug-in comprises an MCU unit, a switching chip, a PHY chip, a high-speed signal connector and a power connector. The MCU unit is configured to configure and manage the switching chip. The switching chip is connected with the PHY chip, the high-speed signal connector and the power connector, and is configured to provide at least two gigabit Ethernet interfaces and at least nine first hundred megabit Ethernet interfaces. One of the two gigabit Ethernet interfaces provides DC48V standard POE power supply externally through the power connector, and the other one of the two gigabit Ethernet interfaces is connected with a vehicle-mounted main control unit through the high-speed signal connector. The at least nine first hundred megabit Ethernet interfaces are respectively connected with one service unit through the high-speed signal connector.

The invention provides an EtherCAT slave station gateway for semiconductor temperature control equipment. The EtherCAT slave station gateway comprises a hardware layer and a software layer, wherein the hardware layer comprises an embedded semiconductor industrial equipment communication gateway, an integrated power supply module, a main control module, an Ethernet communication module, an EtherCAT slave station module and a 24V input and output port module; the software layer is an embedded software system with a layered architecture, is divided into an application layer, a protocol layer and a hardware abstraction layer, and realizes business logic processing, communication protocol conversion and software and hardware interaction decoupling. Through cooperative work of hardware and software, data transmission based on the EtherCAT protocol between the semiconductor production equipment host and the Chiller can be achieved, the real-time performance, accuracy and system maintainability of data transmission are improved, and the requirements of semiconductor production for high precision and high stability of temperature control are met.

The utility model discloses a communication protocol conversion board and a train control system, and the communication protocol conversion board comprises an Ethernet communication interface module which receives coded data transmitted by a train control master control module through an Ethernet interface and uploads track circuit state data to the train control master control module; the CAN communication interface module is used for acquiring CAN data of two CAN buses of the track circuit equipment through two CAN interfaces and sending two pieces of state inquiry data to the track circuit equipment; the main control logic module is used for receiving the coded data, generating two identical state inquiry data according to the coded data, sending the two identical state inquiry data to the CAN communication interface module, converting the received first CAN data and second CAN data into track circuit state data, storing the track circuit state data in a first buffer, and sending the track circuit state data to a second buffer when the coded data is received in the next period; and sending the track circuit state data stored in the first buffer to a train control master control module. According to the invention, network port resources of the train control master control module can be saved, and the real-time performance and the high efficiency of track circuit state data response are improved.

This invention discloses an FPGA-based visible light Ethernet rate-adjustable communication method and system, relating to the field of visible light communication equipment technology. It includes: an off-chip PHY chip, a MAC core, and an FPGA rate conversion and flow control module connected sequentially. The FPGA rate conversion and flow control module is connected to both an FPGA transmit control module and an FPGA receive control module. The FPGA transmit control module and the FPGA receive control module are connected to transceiver circuits, which are then connected to an LED and a photodiode, respectively. This invention addresses the need for visible light-Ethernet communication interface conversion, deeply integrating visible light communication with Ethernet access technology, while simultaneously solving the problem of the traditional single rate of visible light Ethernet, thus broadening the application scenarios of visible light communication.

The application discloses a vehicle-mounted Ethernet centralized data management system and method, relates to the technical field of vehicle-mounted Ethernet communication based on a time-sensitive network, and comprises an ECU identification module, a current parameter analysis module, a historical parameter analysis module and a parameter screening module.The ECU identification module is used for extracting ECU units.The current parameter analysis module is used for obtaining the mention rate and the importance of each basic parameter according to the ECU units, and obtaining a first parameter probability.The historical parameter analysis module is used for extracting the query rate and the modification rate of historical parameters, and obtaining a second parameter probability.The parameter screening module is used for obtaining target basic parameters according to the first parameter probability and the second parameter probability.The shortcut entry module is used for obtaining network entries according to parameter entries, and setting shortcut entries according to the network entries.The entity structure generation module is used for generating a distributed data entity structure.The application has the effect of improving the efficiency and accuracy of parameter query and modification of the vehicle-mounted Ethernet in a test development process.

The invention relates to the technical field of avionics communication. The invention provides an airborne satellite communication processing terminal. The airborne satellite communication processing terminal comprises a data control unit, a satellite data processing unit and a network processing unit, the satellite data processing unit sends data sent by a satellite to the data control unit; the data control unit performs communication protocol analysis and data format conversion on the received data; the data control unit sends the data subjected to communication protocol analysis and data format conversion to the network processing unit; the network processing unit encapsulates the received data into an Ethernet frame and then sends the Ethernet frame to the built-in network; the built-in network sends the received data to the data control unit through the Ethernet communication interface; and the data control unit encrypts the received data, converts the encrypted data into satellite signals and sends the satellite signals to a satellite. Satellite communication is converted into a universal Ethernet communication interface, and the compatibility problem of multi-platform interfaces is solved.

To realize handover by using a ring network that transfers Ethernet frames.SOLUTION: A ring node device uses only a lower address memory that stores the lower address of the MAC address and specifies frame transmission outside a ring, and a duplicated use lower address memory, and attaches an unnecessary lower address deletion bit to a communication start frame or a frame immediately after changing the destination base station, and transfers it on the counterclockwise ring, and when the lower address of the source MAC address of the frame arrives at a ring node device stored in the lower address memory that specifies frame transmission outside the ring of the ring node device or the duplicated use lower address memory, the lower address is deleted, the frame is copied, and the copy frame is sent outside the ring. The base station stores the lower address of the MAC address in the duplicated use lower address memory of the ring node device.SELECTED DRAWING: Figure 1

The application relates to the technical field of computers, in particular to a computer assembly teaching device; the computer assembly teaching device comprises a microcontroller and a power supply control and detection circuit, a base detection circuit, a memory bar detection circuit, a hard disk detection circuit, a fan detection circuit, a PCIEX detection circuit, an Ethernet communication circuit, a USB detection circuit, a front panel output signal control circuit and a detection result output circuit connected with the microcontroller; the computer assembly teaching device is connected with an assembled computer device, the computer assembly teaching device realizes automatic detection of the assembly situation of each main component of a computer mainboard, the process of detecting whether computer assembly is completed by relying on manpower is saved, the computer assembly situation is judged through a final output voltage signal, and the reason for assembly failure is accurately obtained.

The invention discloses a daisy chain type temperature intelligent instrument communication method and system based on an advanced physical layer. A communication method combining the advanced physical layer and a daisy chain topological structure is adopted and applied to a temperature intelligent instrument in the process industry. Collected data and fault data and state data of the intelligent instrument are communicated with the outside through an industrial Ethernet based on an APL, large-scale temperature instrument Ethernet communication in the process industry is realized by adopting a communication medium of the APL, and each instrument in an industrial field is connected with other instruments through an interface of a daisy chain. By adopting the APL instrument, long-distance high-speed communication can be supported, the utilization rate of the acquired data can be improved, the convenience of instrument operation and maintenance can be enhanced, and the defects that the communication content is limited, more meaningful data cannot be transmitted and the use efficiency of the data acquired by the intelligent instrument is reduced due to the fact that the conventional intelligent instrument can only adopt low-speed communication are effectively changed.

The utility model relates to the technical field of fiber bragg grating demodulation, in particular to a multichannel high-speed fiber bragg grating demodulation device, which comprises an optical path module and an electric signal module, the optical path module comprises a tunable laser unit, a PLC (programmable logic controller) unit and a plurality of FBG (fiber bragg grating) sensors, the PLC unit comprises an optical splitter and a plurality of couplers, the electric signal module comprises a main control unit, a photoelectric conversion unit, a DC / DC unit, a 485 communication unit and an Ethernet communication unit, optical signals emitted by the tunable laser unit pass through an optical splitter and a multi-path coupler and then enter an FBG sensor, light is reflected by a grating and then is connected to a photodiode through the coupler, and the photoelectric conversion unit is connected to the Ethernet communication unit. And after photoelectric conversion, AD conversion and peak searching algorithm processing, the optical wavelength is demodulated. According to the utility model, a chip-level data acquisition design is adopted, the scanning speed of the demodulator is improved, fusion with a field system is facilitated through the 485 communication unit, and a heterogeneous system of the master control unit and the FPGA unit is adopted, so that the edge computing capability is enhanced.

The present disclosure relates to a coordinator Ethernet node for an Ethernet communication system, the coordinator Ethernet node comprising: an interface for coupling to a shared medium of the Ethernet communication system, wherein the coordinator Ethernet node is configured to transmit a first beacon via the interface and to trigger a first arbitration period by transmitting the first beacon, and wherein the coordinator Ethernet node is configured to transmit a second beacon via the interface and to trigger a second arbitration period by transmitting the second beacon after the end of the first arbitration period, wherein each arbitration cycle comprises an associated field for a coordinator Ethernet node and each follower Ethernet node of the Ethernet network, referred to as a TO field, representing a transmission opportunity of the respective Ethernet node, and wherein at least one of the arbitration cycles comprises another field for diagnosing the shared medium, referred to as a diagnostic field. The disclosure also relates to a method for a coordinator Ethernet node.

This invention provides a LAN encryption / decryption accelerator system based on Ethernet communication. First, it implements data communication between the accelerator and the host machine being accelerated through a custom MAC layer protocol. Then, addressing the encryption / decryption task allocation problem under two scenarios—balanced and unbalanced computing power among the slave accelerators—corresponding encryption / decryption task allocation and scheduling methods based on the maximum flow minimum cost algorithm are designed to achieve reasonable allocation of encryption / decryption tasks. Using this accelerator technology and system, the host machine can quickly and efficiently allocate the most resource-intensive encryption / decryption tasks to external hardware accelerators within the LAN via the RJ45 Ethernet port. Any host device within a LAN built on the same router can use this system to perform encryption / decryption operations. This system solves the problem of slow encryption / decryption rates caused by host device performance limitations, successfully improving the encryption / decryption performance of host devices.

The utility model discloses a high -speed radio frequency frequency hopping sequence reverse analysis device, including ethernet communication interface physical drive module, central processing module, ASIC hardware IO array trigger aggregation processing module, CANFD subnet communication interface physical drive module, ASIC hardware FIFO cluster array cache module and cluster type radio frequency front end scanning module, ethernet communication interface physical drive module is connected with central processing module, and central processing module is connected with ASIC hardware IO array trigger aggregation processing module, CANFD subnet communication interface physical drive module, ASIC hardware FIFO cluster array cache module and cluster type radio frequency front end scanning module respectively, and cluster type radio frequency front end scanning module is connected with ASIC hardware IO array trigger aggregation processing module, CANFD subnet communication interface physical drive module and ASIC hardware FIFO cluster array cache module respectively. The utility model solves the technical problem that the single function of existing communication device and the wireless frequency hopping communication function detection of unable to realize.

The invention is suitable for the technical field of high-speed Ethernet communication, and provides a data unloading and frame reconstruction optimization method and system for a high-speed Ethernet, and the method comprises the steps: packaging to-be-transmitted data into a UDP frame in an FPGA, calculating a checksum, and forming a complete UDP frame; packaging the UDP frame into an IP data packet, then packaging the IP data packet into an Ethernet frame, and controlling splicing of the frames; the packaged Ethernet frame is cached in a Frame FIFO (First In First Out); the format is further converted through a data format conversion module; scrambling the data, and carrying out serial transmission; at a receiving end, descrambling the received data and converting the format; analyzing the Ethernet frame layer by layer through a receiving state machine, and separating IP data or ARP data; the IP data are further analyzed, and UDP data are extracted and transmitted to the data processing module; according to the invention, the Ethernet transmission rate can be greatly improved, and the dependence on hardware is reduced.

The application discloses a vehicle body control network communication signal automatic test method and system, comprising: analyzing a vehicle-mounted CAN network database file, extracting CAN bus, message ID, message name and signal name information, and generating a signal file; based on the signal file and a signal sending configuration file configured for each test signal, constructing a message sending queue through a priority queue and a real-time thread, sending a trigger CAN signal to a first to-be-tested hardware device based on the queue, triggering a second to-be-tested hardware device to run an Ethernet communication protocol executable file to send a trigger Ethernet signal to the first to-be-tested hardware device, receiving and recording response signals and time stamps of the to-be-tested hardware device; and analyzing signal values and communication timing and generating a test report. The application realizes automatic test, accurately coordinates multiple bus signal cooperation, forms a complete test closed loop, improves test efficiency and reliability, and is suitable for communication test of a vehicle body control multiple bus fusion architecture.

The application provides a lithium battery protection plate activation device and method in the technical field of lithium battery formation and capacity grading, which comprises a host computer, an Ethernet communication module, a main control chip and a plurality of optocoupler on-off modules; one end of the Ethernet communication module is connected with the host computer, and the other end is connected with the main control chip; the main control chip is connected with each optocoupler on-off module; the Ethernet communication module comprises an Ethernet chip U30, a resistor R16, a resistor R129, a capacitor C10, a capacitor C165, a capacitor C166, a capacitor C167, a capacitor C173, a capacitor C174 and a crystal oscillator Y4. The application has the advantages that the activation efficiency of the lithium battery protection plate is greatly improved.

The utility model relates to the technical field of automatic control of rail locomotives, and provides a controller circuit for automatic speed limiting of a rail locomotive, which comprises a singlechip circuit, a clock circuit, a gear sampling circuit, a gear output circuit, an Ethernet communication circuit and an RFID (Radio Frequency Identification) card reading module, the gear sampling circuit is used for providing accurate time marks, the input end of the gear sampling circuit is connected with a driver controller of the rail locomotive, the output end of the gear sampling circuit is connected with the single-chip microcomputer circuit, the gear sampling circuit is used for collecting gear information input by the driver controller, and the gear output circuit is used for outputting gear adjusting information to a control system of the rail locomotive. One end of the Ethernet communication circuit is connected with the single-chip microcomputer circuit, the other end of the Ethernet communication circuit is used for being connected with a sensor, and the RFID card reading module is connected with the single-chip microcomputer circuit and used for reading preset speed limit information in an RFID tag beside a track; the rail locomotive speed limiting device can automatically limit the speed of a rail locomotive on a corresponding road section.