254 results about "Baud" patented technology

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.

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.

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.

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.

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 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 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.

The invention discloses a serial port baud rate adaptive adjustment method and a prototype verification platform, and relates to the technical field of chip verification, and the method comprises the steps: determining a third value range corresponding to a configured register according to a first value range of the working frequency of the prototype verification platform and a second value range of a baud rate corresponding to a serial port module, after sampling is carried out according to different baud rates in the second value range, the obtained first corresponding relation between the baud rates and the mapping values is converted into the second corresponding relation between the register values and the mapping values, the second corresponding relation determines the optimal register value in the third value range, and then the optimal baud rate is determined according to the optimal register value. The technical effects that the optimal baud rate can be determined according to the test scene change and the hardware environment limitation of the prototype verification platform, so that the current test scene is adapted, the baud rate of a serial port does not need to be manually and repeatedly adjusted and configured after the test scene is switched, and the test efficiency of the prototype verification platform is improved are achieved.

The present invention relates to a CAN bus intrusion prevention circuit and method. The circuit includes a microprocessor (MCU), NPN transistors Q1, Q2, and Q3, coupling capacitors C1 and C2, current-limiting resistors R3, R4, R5, R6, R7, R8, R9, and R10, a 3.5V voltage-stabilizing diode D2, a 2.5V voltage-stabilizing diode D3, and a 1.5V voltage-stabilizing diode D4. The microprocessor MCU has a board-level communication interface O1 for receiving instructions to activate an intrusion prevention function, and a PWM pin for outputting a PWM signal. The PWM signal has a frequency that is ten times or more greater than the baud rate of the connected CAN bus, a high level of not less than 3.3V, and a duty cycle of not less than 0.9. Based on the characteristics of the CAN link layer protocol, the present invention can immediately initiate intrusion prevention upon detecting abnormal CAN bus data, thereby actively shielding illegal or hijacked attacking devices and protecting bus security.

This invention discloses a baud rate setting method, apparatus, device, and storage medium. The method includes: identifying preset baud rate validity flag information in a preset memory of a target control unit to obtain a baud rate validity flag information identification result; determining a target baud rate setting strategy for the target control unit that matches an associated data transmission object based on the baud rate validity flag information identification result; and setting the target baud rate of the target control unit according to the target baud rate setting strategy. The technical solution of this invention solves the problem that existing technologies offer only one baud rate setting method, which is not applicable to different scenarios. It can enrich the baud rate setting methods, match appropriate baud rate setting methods according to different scenarios, and improve adaptability to different scenarios.

The application belongs to the technical field of integrated circuits, and particularly relates to a UART decimal correction circuit and a correction method. The UART decimal correction circuit comprises a frequency division coefficient preloading circuit, an integer frequency division up counter, a decimal correction down counter, and a decimal correction algorithm circuit. The decimal correction algorithm circuit is used for inputting a count value cnt_i[9:0] and a count value cnt_f[3:0], determining a decimal correction sampling point through a shift, negation and comparison mode, and outputting a pulse signal reload to the integer frequency division up counter, the decimal correction down counter and a D flip-flop. When the pulse signal reload is valid, it is determined whether the integer frequency division up counter needs to be added by 1 and whether the decimal correction down counter needs to be subtracted by 1. The D flip-flop is used. The application determines the decimal correction sampling point through the shift, negation and comparison algorithm, so that a more accurate baud rate is realized with less logic.

The embodiments of the present application provide a communication baud rate adaptation method. The method comprises: a receiving end can receive a communication negotiation signal sent by a sending end on the basis of a first baud rate; the receiving end can determine a first duration on the basis of a duration of a start signal comprised in the communication negotiation signal, and determine a second duration on the basis of a duration of a stop signal comprised in the communication negotiation signal; and the receiving end determines a second baud rate on the basis of one or both of the first duration and the second duration, the second baud rate being used for receiving the signal of the sending end.

Systems, methods, and apparatuses for industrial equipment diagnostics are disclosed. Specifically, a bus controller operatively connected to a processor is physically connected to two or more controller area network (CAN) buses, wherein each CAN bus operates according to a different protocol. The bus controller is configured to control the rate at which messages are received on certain buses by adjusting parameters such as a baud rate and sample rate. The bus controller is further configured to filter or mask certain CAN bus messages based on identifiers within the messages. The bus controller is operatively connected to a remote processing system for processing the CAN bus messages from their raw data format into a useable format. The remote processing system performs diagnostic analysis on the processed CAN bus messages, and furthermore performs predictive analytics on the processed CAN bus messages to identify patterns or discrete events indicative of future system failures.

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 belongs to the technical field of digital information transmission, and particularly relates to instrument data acquisition, in particular to an instrument data acquisition system and an instrument data acquisition method.According to the instrument data acquisition system, after acquisition equipment is connected with instrument equipment, a time parameter of a first code element is obtained; the Baud rate is preliminarily determined according to the time parameter of the first code element, data acquisition is carried out according to the preliminarily determined Baud rate, an oscillogram is constructed according to the acquired data, the final Baud rate is determined in the oscillogram according to the effective area, and after the final Baud rate is determined, data interaction is carried out between the instrument equipment and the final Baud rate. Therefore, the Baud rate of the instrument equipment can be quickly and accurately determined, the acquisition equipment can conveniently adopt the Baud rate corresponding to the instrument equipment for communication, and accurate transmission of instrument data is completed.

The invention discloses a nitrogen-oxygen sensor protocol adaptive detection device and method based on machine learning, and relates to the technical field of vehicle emission control. The equipment comprises an upper computer, a CAN (Controller Area Network) communication module, IO (Input / Output) equipment and a controllable power supply module, according to the method, precise matching of protocols is achieved through a three-layer cascade decision-making architecture based on a random forest classifier, stable communication is established in combination with automatic baud rate detection, and distinguishing detection and initialization of front and rear nitrogen oxygen sensors are achieved through dynamic pin state control and power-on and power-off management. And meanwhile, the system has comprehensive data extraction, real-time display and fault diagnosis optimization functions. The method solves the problems of low protocol matching accuracy, insufficient dynamic detection capability, incomplete data extraction, tedious operation, poor system adaptability and the like in the prior art, and has the advantages of high accuracy, strong adaptive capability, high automation degree, good compatibility and the like.

This invention discloses a code-assisted baud rate sampling clock recovery method and system, applicable to the field of optical fiber communication technology. The method includes the following steps: performing matched filtering on the received signal; using the M&M algorithm to complete primary clock recovery on data from an oscilloscope to obtain baud rate sampling data; performing equalization processing on the baud rate sampling data; using a belief propagation algorithm to decode the equalized baud rate sampling data and output reliability estimation information; modulating the reliability estimation information of each baud rate sampling data into a PAM4 auxiliary symbol according to the PAM4 mapping rule; using the PAM4 auxiliary symbol to replace the decision symbol in the M&M algorithm to re-estimate the clock error and perform high-precision clock recovery. This invention, by combining primary and auxiliary clock recovery stages, significantly reduces the bit error rate and provides more stable clock synchronization in high data rate scenarios.

The invention discloses an encoder test method and test system, the encoder test method is applied to an encoder test board, a first end of the encoder test board is connected with an encoder, and the encoder supports a preset protocol; the test method comprises the following steps: when a start bit of a first data frame in feedback data sent by an encoder is detected, starting timing to obtain a first moment; when the start bit of the last data frame in the feedback data sent by the encoder is detected, timing is stopped, and a second moment is obtained; determining a time interval based on the first moment and the second moment; and calculating the Baud rate deviation of the encoder based on the time interval and a preset time interval. According to the mode, the Baud rate of the encoder can be monitored, and the performance of the encoder can be determined based on the Baud rate deviation of the encoder.

The present invention discloses a high-precision cascade inverter synchronous control method, comprising: using a main controller to periodically send fundamental wave data and control instructions to a cascade module controller; using the cascade module controller to receive the fundamental wave data and control instructions, and using a synchronization detection unit provided therein to record a serial communication signal at a sampling frequency that is a multiple of the communication baud rate, and determining a clock offset based on the time interval between two adjacent level changes in the serial communication signal; using a synchronization counting unit provided in the cascade module controller to correct a synchronization counting unit counter based on the clock offset; adjusting a carrier counting unit counter based on the corrected synchronization counting unit counter; comparing the adjusted carrier counting unit counter with the fundamental wave data to generate a switching signal for a power device, thereby achieving synchronous control of the cascade inverter. The present invention can achieve relatively high precision and stability, and the synchronization level can be selected based on cost and demand.

The application discloses a CAN baud rate automatic matching method, comprising the following steps: obtaining a first target baud rate; obtaining a second target baud rate between a communication node and a CAN bus based on clock synchronization detection; determining that the first target baud rate and the second target baud rate are matched successfully when the error between the first target baud rate and the second target baud rate is less than a preset value; and matching the communication between the communication node and the CAN bus at the first target baud rate. The method can reduce the error rate of manual baud rate configuration and improve the efficiency.