327 results about "Baud" patented technology

The invention discloses a self-adaptive packet data transmission system and method based on Beidou short messages, the system is composed of eight core modules such as a serial port communication module, a protocol conversion module and a configuration module, multi-link communication is established through an RS232 serial port and a Beidou director, and Baud rate self-adaptive adjustment and multi-serial port parallel processing are supported. The protocol conversion module adopts a finite-state machine to analyze a BDS-3 protocol, data fragmentation and recombination are achieved in combination with a sliding window algorithm, and the compression rate reaches 3: 1. The method comprises the following seven stages of flows: evaluating channel quality by detecting a message, and dynamically switching a BDS-3 anti-interference mode; implementing flow control by adopting a token bucket algorithm, and dividing three levels of QoS guarantee emergency instructions; and terminal health management is realized through a heartbeat detection and diagnosis instruction set. According to the method, instruction execution is delayed by 1.2 seconds in emergency communication, the bit error rate is controlled to be 0.0005%, the transmission efficiency is improved by 40% compared with a traditional scheme, and the method can be widely applied to the fields of Internet of Things, intelligent transportation and the like.

The invention relates to the technical field of computer hardware and network communication, in particular to a high-speed I / O (input / output) virtualization server based on an FPGA (field programmable gate array) and a remote forwarding method.The high-speed I / O virtualization server comprises an FPGA chip, a network processing unit, an I / O protocol processing unit, a protocol conversion and scheduling unit, a time sequence and transaction management unit and a data buffering and flow control unit are integrated in the FPGA chip; the optical fiber Ethernet interface module comprises a physical layer interface and an MAC layer processing and network configuration interface; the local I / O interface module comprises a USB interface circuit, a serial port interface circuit, a PCIe interface circuit and an interface expansion connector; the power supply and monitoring module comprises a multi-path power supply management system, a state monitoring and diagnosis system and an LED indication system; according to the self-adaptive Baud rate detection circuit, the Baud rate can be accurately locked under the condition that data with less than two characters is received, the number of data bits, the type of a check bit and the length of a stop bit are automatically identified, and compared with a traditional microcontroller scheme, the self-adaptive Baud rate detection circuit has higher precision and higher detection speed.

The invention provides an anti-interference serial port communication method and system for an industrial-grade wireless module, and the method comprises the steps: collecting interference data in the serial port communication of the industrial-grade wireless module in real time based on a multi-dimensional interference feature collection module, and forming a multi-scale interference feature vector; inputting the multi-scale interference feature vector into a Mamba communication state space model fused with a CRC (Cyclic Redundancy Check) mechanism, and predicting a potential interference mode through linear complexity time sequence modeling; based on an adaptive weight transmission optimization function, carrying out dynamic weighting adjustment on the transmission parameters in the potential interference mode; wherein the transmission parameters comprise a baud rate, a data bit length, a verification mode and a retransmission strategy. According to the invention, hardware cost does not need to be increased, and the cost of anti-interference serial port communication is reduced; meanwhile, based on an adaptive weight transmission optimization function, dynamic weighting adjustment is carried out on transmission parameters in a potential interference mode, and interference dynamic changes are tracked in real time to carry out anti-interference communication.

The invention discloses a serial port communication transmission method and system with high baud rate tolerance. The method comprises the following steps: S1, monitoring a serial port communication line until a level change from logic '1' to logic '0' is detected, and detecting a start bit of a data frame through a triple acknowledgement mechanism; s2, after the transmission of the data bits and the optional parity check bits is completed, continuously monitoring the serial port communication line until the level change from the logic '0' to the logic '1' is detected, and confirming a stop bit for detecting a data frame through triple sampling; and S3, after the stop bit of the data frame is ended, returning to the step S1 to detect the start bit of the next frame of data. According to the invention, by adopting a triple acknowledgement mechanism and a triple sampling acknowledgement method, the start bit and the stop bit of the data frame can be accurately detected, accurate receiving of data can be kept even under the conditions of Baud rate change and noise interference, and an efficient and reliable serial port communication solution is provided for users.

The embodiment of the invention discloses a data processing method for optical communication and a related device, which adopt inner code coding with higher gain to improve the performance of cascade coding, can be better compatible with DP-16QAM (quadrature amplitude modulation) and DP-QPSK (differential phase shift keying) modulation, and can be favorably applied to high-baud-rate long-distance transmission scenes such as 800G and 1.6 T-ZR. Specifically, firstly, a first bit set is obtained, the first bit set comprises d1 bits, d1 = 244664 * L, and L is a positive integer. Then, first FEC coding is carried out on the first bit set to obtain a second bit set, the second bit set comprises d2 bits, every 244664 bits in the first bit set are subjected to first FEC coding to obtain every 261086 bits in the second bit set, and d2 = 261086 * L; next, adding dpad filling bits to the second bit set to obtain a third bit set, dpad being an integer greater than or equal to 0; and performing second FEC coding on the third bit set to obtain a fourth bit set.

A system and method of reducing data loss in a system utilizing a bus protocol that does not support flow control is disclosed. The peripheral device utilizes a spill buffer which is used to capture any data sent by the host before the peripheral device is able to properly configure the DMA controller. Additionally, the peripheral device includes a recovery routine, which is a software program that parses the spill buffer and extracts any headers or payloads that are contained therein. Using the spill buffer and recovery routine, the baud rate of the bus interface may be increases without incurring any increase in data loss.

An adjustable bandwidth current-to-voltage converter for use in an optical receiver includes an input configured to receive current from a photodetector; an amplifier stage connected to the input; a feedback path connected to the amplifier stage and to an output, wherein the feedback path includes a feedback element and an operating mode switch configured to set one of photodetector amplifier with dynamic load (PADL) mode and an integrate-and-dump (I&D) mode. The PADL mode is for higher baud operation than the I&D mode.

The invention discloses a serial-port-based digital input and output control method and device and a storage medium, and relates to the technical field of electronic digital data processing.The serial-port-based digital input and output control method comprises the steps that if it is detected that a main board serial port is connected into a daughter card, serial port clock frequency multiplication is determined in response to programming interface calling; assembling the data to be transmitted into a communication instruction corresponding to the current frame; and transmitting the communication instruction to the daughter card through the serial port based on the baud rate determined by the serial port clock frequency multiplication. Therefore, the technical effect of reducing serial port data transmission delay so as to realize high-speed digital input and output expansion is realized.

The invention discloses a burning management method and system for a burning upper computer. The method comprises the following steps: performing user identity verification according to user identity information of a burning applicant; after the user identity verification succeeds, performing burning permission verification on the to-be-burnt data; when the to-be-burnt data meets the burning authority, burning the to-be-burnt data, dividing the to-be-burnt data into a plurality of burning data frames, encrypting each burning data frame in sequence, and sending the encrypted burning data frames to the burning equipment; in the burning process, feedback data of the current burning data frame are received, burning verification is conducted on the current burning data frame according to the feedback data, and the burning baud rate of the next burning data frame is adjusted; after burning is completed, burning verification is carried out on the burning equipment, and the burning state of the to-be-burnt data is determined. Through the automatic and intelligent burning process, the burning efficiency and accuracy are improved. And the burning parameters are adjusted according to the burning condition, so that the burning stability and the burning speed in the burning process are ensured.

The invention discloses a single-serial-port multi-software sharing system and method. The method comprises the following steps: generating a plurality of virtual serial ports in an operating system; setting serial port parameters, wherein the serial port parameters comprise a baud rate, a data bit and a stop bit; configuring serial port forwarding parameters, namely selecting a physical serial port and setting data transmission parameters; establishing connection between physical serial ports and virtual serial ports and pairwise connection between the virtual serial ports according to the serial port forwarding parameters and the serial port parameters; receiving data from the physical serial port or the virtual serial port, performing analysis and error check, and removing error data to obtain serial port data; converting and formatting the serial port data to obtain processed data; and sending the processed data to the virtual serial port or sending the data from the virtual serial port to the physical serial port.

A system and method for monitoring signal quality metrics coupled with closed-loop control improves rectifier signal quality and stability. The closed-loop control passes the metric through a high-pass filter and captures error values. This signal is then passed to a controller to adjust rectifier settings. The measured signal, where signal quality is derived could be VRECT, FCLK, network coil measurements, is used for ASK demodulation, or the like. The controller identifies noise levels and noise types in real-time, and sets parameters of the rectifier to preserve system stability. The controller may set baud rates and preamble thresholds in a wireless power transfer system in response to identified noise levels and types.

The invention discloses a control circuit of a serial port transceiver circuit and a clock synchronization method, and belongs to the technical field of data communication. The circuit comprises a clock synchronization circuit and a register value generation circuit, wherein the output end of the register value generation circuit is connected with the first input end of a first selector in a transceiver circuit; the clock synchronization circuit outputs a reference clock rising edge according to the received slow reference clock; the register value generation circuit counts a main clock based on the rising edge of the reference clock and outputs a self-adaptive baud rate count value; the first selector selects the self-adaptive baud rate count value and a configuration signal of the register block and outputs a selection signal; and the transceiving module drives data transceiving with the register group according to the clock corresponding to the selection signal so as to adjust the main clock. According to the circuit, the influence of the deviation between the preset value and the actual value on the communication precision can be reduced under the condition that the main clock of the equipment is unstable.

The invention discloses a photovoltaic inverter protocol intelligent identification method and system, electronic equipment and a storage medium, and the method comprises the steps: firstly monitoring an interaction message between an inverter collector and an inverter, carrying out the analysis and verification of different baud rates, so as to guarantee the obtaining of a correct analysis message, and then, carrying out the verification of the analysis message, thereby achieving the intelligent identification of the photovoltaic inverter protocol. According to the method, the message features extracted from the correct analysis message are matched with the message features pre-stored in the protocol identification feature library, if matching succeeds, protocol identification succeeds, compared with an existing traversal polling mechanism, the inverter protocol can be rapidly identified after equipment is powered on, the identification speed is greatly increased, and in addition, the efficiency is improved. The interaction message between the inverter collector and the inverter is essentially the communication signal, and the communication signal is analyzed and the communication characteristics are extracted for identification, so that the external interference in the communication process is effectively avoided, and the protocol identification accuracy is improved.

A communication method and device based on a multi-circuit board system, and a medium, the method at least comprising the following steps: S100, authenticating a communication relationship between a main control board and each device module according to a communication authentication request; s200, based on a handshake protocol, judging whether the main control board and the device module can be switched to the same baud rate or not; if yes, the two communicate normally, and if not, S300 or S400 is executed; s300, based on a preset baud rate list, judging whether baud rate matching of the main control board and the device module is successful or not, if yes, performing normal communication between the main control board and the device module, and if not, executing S400; and S400, calculating the Baud rate predicted value of the device module, and sending test data to verify whether the communication state of the main control board and the device module is normal, and if yes, the main control board and the device module communicate normally. According to the invention, the baud rate of the device module can be automatically identified and matched, and the adaptability and communication reliability of the multi-circuit board system are improved.

The invention discloses an intelligent insulation parameter dynamic monitoring and regulation system based on a GD32 microcontroller, and belongs to the field of power electronic insulation monitoring. According to the system, a distributed monitoring network is constructed by taking GD32 as a core processor, a multi-channel time-sharing sampling and dynamic impedance measurement algorithm is integrated, GA / GB dual-channel independent sampling is realized by virtue of a state machine, and the sampling efficiency is improved by 80% compared with that of a traditional scheme. A programmable resistance network and a low-noise operational amplifier are adopted, 1 pF to 100 nF impedance matching and 5-200-time dynamic gain adjustment are achieved, an optical coupler switching dynamic impedance measurement method is originally created, four sets of voltage are adopted for time-sharing conduction of a solid-state relay, and 1.5% high precision is achieved through an improved voltage division model. LC-pi type filtering is adopted at a signal input end, and the high-frequency noise suppression ratio is larger than 20 dB; and a CAN module is newly added, so that a CAN2.0B extension frame and an adjustable Baud rate of 10k-1Mbps are supported. Actual measurement shows that the system can measure 10-65M omega insulation resistance in new energy and rail transit scenes, the dynamic response is smaller than or equal to 200ms, the system is suitable for the fields of medical equipment, industrial sensors and the like, and the overall performance is improved by three times compared with that of a traditional scheme.

The invention provides a dynamic adaptation method and system for a multi-mode power supply compatible charging pile system, and the method comprises the steps: building a multi-protocol physical layer compatible connection between a charging pile and a power supply module through a multi-communication interface layer, and receiving a data frame inputted by the charging pile; analyzing a baud rate, a check bit and an instruction set of the data frame, and identifying a charging pile protocol type and a power module protocol type; querying a matching mapping relationship between the charging pile protocol type and the power supply module protocol type in the dynamic adaptation matrix; if the matching mapping relation exists, data field conversion is executed, and a target protocol frame is generated; and if the matching mapping relation does not exist, starting a machine learning process, creating a temporary mapping rule, and effectively solving the problems of poor compatibility and high manual configuration cost of the charging pile and the power supply module in a traditional protocol mode through the modes of protocol analysis, intelligent matching and dynamic learning.

The embodiments of the present application relate to the technical field of radio communications. Provided are a radio-over-fiber communication apparatus, system and method. The radio-over-fiber communication apparatus comprises: an aggregation module, which is coupled to a remote radio head and is used for adjusting the baud rate of a feedback signal to obtain a compatible signal, combining the compatible signal and a received signal, so as to obtain an aggregated signal, and transmitting the aggregated signal by means of an optical fiber link, wherein the feedback signal is used for performing nonlinear compensation on a transmitted signal, and the frequency null of the compatible signal overlaps the frequency point of the received signal; and a splitting module, which is coupled to a baseband unit and is used for acquiring the aggregated signal by means of the optical fiber link, and splitting the aggregated signal into two signals, wherein the two signals are respectively used for the baseband unit to acquire the received signal and the feedback signal. In the solution provided in the present application, existing optical fiber resources in a radio-over-fiber communication system can be used to reduce the cost and power consumption of the system.

To provide a communication device, a communication system, and a communication method that can accommodate baud rate fluctuations with a relatively simple configuration.SOLUTION: A communication device includes a measurement unit that measures the duration of a known signal level using communication data transmitted from an opposing device, in which one or more predetermined bits are set to a known signal level, and an adjustment unit that adjusts the time per bit in asynchronous serial communication with the opposing device on the basis of the duration and the number of the one or more bits.SELECTED DRAWING: Figure 4

The embodiment of the invention provides a baud rate adjusting method and device, electronic equipment and a storage medium. The method comprises the steps that the current environment temperature of the equipment and the environment temperature of the last moment are acquired; when the temperature difference between the current environment temperature and the environment temperature at the previous moment is greater than a preset temperature, determining a current baud rate coarse adjustment value, a current clock frequency and the sampling times for the communication rate of the equipment; determining a target baud rate according to the current baud rate coarse adjustment value, the current clock frequency and the sampling times; and determining the current baud rate, and adjusting the current baud rate to the target baud rate. Therefore, when the current temperature environment changes, the target baud rate can be determined in time according to the current baud rate coarse adjustment value, the current clock frequency and the sampling times, and the current baud rate is adjusted, so that the phenomenon that communication receiving or sending fails due to the fact that the error between the current baud rate and the actual requirement exceeds a certain range is avoided.

The invention belongs to the technical field of data communication, and provides a communication protocol system of an electric energy meter and an upper computer, which comprises the upper computer and the electric energy meter, the upper computer is used for acquiring transmission state data of a plurality of historical messages, determining a current baud rate according to the transmission state data, constructing a request frame, and sending the request frame to the electric energy meter according to the current baud rate; the electric energy meter is used for performing correctness verification on first key information in the request frame, if the verification is passed, sending a response frame to the upper computer, analyzing key identification information in the request frame, querying target data according to an analysis result, and constructing and sending a data frame to the upper computer according to the queried target data; and the upper computer is also used for analyzing the data frame to obtain the target data if the data frame is subsequently received and the second key information in the data frame passes the correctness verification after the response frame is received within the set duration. According to the scheme, the stability and convenience of a communication link between the electric energy meter and the upper computer can be improved.

The embodiment of the invention relates to the technical field of communication, in particular to a baud rate detection method, a control device and a storage medium, the method is applied to the control device, the control device is in communication connection with an upper computer through a communication interface, the upper computer is used for sending a baud rate detection frame to the control device, and the control device comprises a first counter. The method comprises the steps that a first count value of a first counter is acquired, the first count value represents a target period of a control device receiving a baud rate detection frame, the control device adopts the number of system clocks to represent the target period, and the baud rate of a communication interface is acquired based on the first count value. According to the embodiment of the invention, the target period of the control device for receiving the baud rate detection frame is obtained by counting through the first counter, so that the baud rate of the communication interface is detected, the baud rate detection precision is improved, the baud rate detection error of the communication interface can be reduced, and the user experience is improved.

The invention discloses a CAN baud rate automatic matching method. The method comprises the following steps: acquiring a first target baud rate; obtaining a second target baud rate between the communication node and the CAN bus based on clock synchronization detection; when the error between the first target Baud rate and the second target Baud rate is smaller than a preset value, judging that the two are successfully matched; and matching the communication between the communication node and the CAN bus according to the first target baud rate. The method can reduce the error rate of manually configuring the baud rates one by one and improve the efficiency.

The invention relates to an electric power collection system and method based on a Beidou satellite communication link. The electric power collection system comprises a collection terminal, a Beidou satellite and a Beidou front-end processor which are connected in sequence. The acquisition terminal comprises a pairing module which tries to establish communication connection with the terminal site at various baud rates and various communication protocols, and establishes communication connection with the Beidou satellite through a Beidou short message sending module; the data acquisition module is used for acquiring electric energy data of a terminal station; the internal storage unit is used for recording and storing the Baud rate and the communication protocol used this time in the internal storage unit, and storing the electric energy data in the internal storage unit; the time service module is used for carrying out precise time service operation on the terminal stations or the data acquisition module with the disordered clocks; the Beidou short message sending module is used for analyzing the stored electric energy data into Beidou No.3 short messages and orderly sending the Beidou No.3 short messages to a Beidou satellite according to a specified sending interval; and the Beidou satellite receives the short message and then sends the short message to the Beidou front-end processor.

The invention relates to an improved ABSPD clock recovery method under single Baud rate sampling, clock synchronization of receiving and transmitting end signals is realized through a clock recovery loop based on a full number font, and when a provided timing error detector calculates a timing error e, symbol judgment and shift operation are used for replacing numerical multiplication; after a timing error e is calculated by the timing error detector, the timing error e is input into a loop filter for noise filtering, and a control word W is obtained; controlling the numerically controlled oscillator by using the control word W, and calculating a fractional interval mu k according to the output NCO of the numerically controlled oscillator and the control word W; and carrying out interpolation on the received signal in an interpolation filter by utilizing the integer mark mk of the symbol and the calculated fractional interval mu k so as to calculate and obtain data with correct timing. According to the invention, ABSPD clock recovery under single Baud rate sampling without multiplication operation is realized, and the complexity of the whole clock recovery loop is obviously reduced.

The invention provides a dual-CAN channel fusion J1939 protocol stack of a vehicle-mounted terminal and a parallel communication diagnosis method, and aims to solve the problems that an existing dual-CAN channel terminal lacks a protocol layer parallel processing mechanism and an intelligent routing strategy, communication and diagnosis conflicts still exist, and a J1939 protocol is insufficient in adaptation and poor in baud rate adaptation flexibility. The method comprises the following steps: S1, constructing a dual-CAN FD channel and dynamic baud rate adaptive detection mechanism, and providing a link basis for service isolation; s2, integrating J1939 and UDSonCAN dual protocol stacks based on dual CAN FD channels, and establishing data mapping to realize data collaboration between protocols; s3, designing an intelligent message routing and channel flow monitoring mechanism, and ensuring conflict-free parallel transmission of communication and diagnosis services; and S4, newly adding J1939 network management, configuration parameter persistence and firmware online upgrading functions, and improving the maintainability of the terminal. According to the invention, the advantages of dual-CAN channel hardware are fully exerted, efficient cooperation of communication and diagnosis and protocol deep compatibility are realized, and the compatibility, flexibility and stability of the terminal are greatly improved.

The invention provides a Baud rate adaptive adjustment method and device. The Baud rate adaptive adjustment method comprises the following steps: acquiring target signal information of a target chip in a preset time interval; the initial baud rate of the target chip in the preset time interval is calculated according to the target signal information, a reference baud rate is determined based on the initial baud rate, and the reference baud rate is larger than the initial baud rate; performing data transmission based on the reference baud rate, and detecting a data transmission result; under the condition that the data transmission result is normal, setting the reference baud rate as an initial baud rate, and continuing to execute the step of determining the reference baud rate based on the initial baud rate; under the condition that the data transmission result is abnormal, the initial baud rate is determined as the target baud rate, by means of the method, the appropriate baud rate can be adjusted in a self-adaptive mode for data transmission, and the data communication efficiency is improved.

The invention discloses a serial port communication method based on a browser. The method comprises the following steps: requesting a user to authorize to access a serial port device through a navigator.series. Request Port (); the method comprises the following steps: creating a serial port control type instance by constructing a function constructor, and configuring indexes, a baud rate, a data bit, a stop bit and a check bit parameter; calling an openPort () method to open a serial port, and introducing configuration parameters to establish connection; the method comprises the following steps of: acquiring a flow reader through a port.readable. GetReader (), establishing a read-write lock, analyzing return data according to a read type parameter, judging the type of a sent instruction according to the write type parameter, automatically converting instruction data, acquiring the flow reader through the port.readable. GetReader (), establishing the read-write lock, analyzing the return data according to the read type parameter, and calling the port.relayLock () to release the read-write lock after the data is received and transmitted; and instantiating the serial port control component in the Web page, and dynamically managing the connection state and the data flow. According to the invention, serial port communication can be realized only by opening the browser without installing extra software; pure front-end implementation is realized, and a back-end server or a local program is not needed; and the method accords with the modern Web standard and has strong future compatibility.

Systems, methods, and circuitry for determining a delay through a modem of a transceiver are provided. An integrated circuit system may include a transmit signal path, delay calibration circuitry, and a phase detector. The delay calibration circuitry may allow determination of a delay through a transmit signal path between a calibration sequence signal source and an output of the transmit signal path. The transmit signal path may include a number of processing stages having a possible delay variation under different conditions. The phase detector may determine a fractional baud rate difference between the calibration sequence signal source and a signal representative of the output of the transmit signal path

The invention provides a communication compatibility control method, device and system and a gateway, and belongs to the technical field of communication. The method is applied to a gateway and specifically comprises the following steps: when a main serial port arranged on the gateway cannot identify a communication electric signal sent by main equipment, sampling the communication electric signal transmitted on a receiving signal line of the main serial port through an interruption mechanism to obtain a plurality of level signals; according to a plurality of pulse widths corresponding to the plurality of level signals, determining a baud rate of the master device, and converting the plurality of level signals to obtain a target bit string; analyzing the target bit string to obtain a main serial port communication protocol and all byte data; and decoding all the byte data to obtain a character string, sending the character string to the slave device, and configuring the main serial port according to the baud rate of the main device and the communication protocol of the main serial port. According to the invention, automation of communication parameter configuration between the master device and the slave device can be realized through a gateway bridging mode.

The invention provides a method for achieving CAN bus baud rate self-adaption, and belongs to the technical field of CAN bus communication. The method comprises the steps that S1, an MCU chip controls a CAN controller to send a test message according to a preset baud rate; s2, if it is determined that the Baud rate for sending the test message is not matched with the Baud rate of the CAN bus, the preset Baud rate is changed, and the step S1 is executed again; and if the Baud rate for sending the test message is determined to be matched with the Baud rate of the CAN bus, the Baud rate matching is successful, and the process is ended. According to the method, network baud rate self-adaption is achieved for the CAN network newly-added nodes in a message sending or receiving mode, the adaptive network baud rate has the advantages of being high in recognition rate, stable, reliable, high in speed, simple, easy to achieve and the like, the baud rate setting problem of the newly-added nodes when the CAN network baud rate is unknown can be effectively solved, and the CAN network baud rate setting efficiency is improved. And the flexibility of CAN network communication is improved to a certain extent.