13 results about "Pulse synchronization" patented technology

A water pump flow control method and control system, the method comprising S1: control system initialization, obtaining a global impedance set through the control system, the global impedance set comprising but not limited to impedance coefficients Z of all branches i , initial pressure Q s , and falling slope K; S2: based on the global impedance set, through the pulse synchronous constant current control method, coordinating the pulse switch timing of all branches, making the whole pipe network system run synchronously in constant current; S3: if the pulse unit at the inlet end of any branch detects that the pressure waveform is continuously abnormal, the fault diagnosis module will send a fault alarm and diagnosis result to the main controller, the main controller isolates the abnormal branch, and re-executes S2. Through the control method and system, the variable frequency water pump can be started at off-peak, avoiding the huge pressure impact caused by the simultaneous start and stop of all valves. Secondly, the variable frequency water pump always works near the resonance point, the output constant flow is stable, the system runs in the "resonance" state, and the irrigation is more stable.

This invention discloses a high-precision geographic data system device and its multi-source data fusion processing method, belonging to the field of geographic information acquisition technology. The data collector adopts a modular design, including a multi-frequency GNSS positioning module, a multi-sensor collaborative system, a data processing and fusion module, a power supply and communication module, and a rugged structure. The GNSS module, combined with an IMU unit, achieves centimeter-level RTK positioning and maintains continuous positioning through inertial navigation and visual SLAM even in signal-blocked environments. Environmental sensors provide weather correction to improve elevation accuracy; the image unit synchronizes with the GNSS second pulse to achieve image marking. The outer shell employs layered electromagnetic shielding and IP67 protection design, and the antenna bracket allows for stepless adjustment of the elevation angle to reduce multipath errors. The system supports 5G and LoRa adaptive communication, enabling real-time data upload and edge fusion processing. This invention has the advantages of high positioning accuracy, strong environmental adaptability, and high data acquisition efficiency, and is suitable for scenarios such as surveying, emergency rescue, and geographic monitoring.

The embodiment of the application discloses a timing compensation device based on CAN protocol and electronic equipment, and relates to the field of signal processing. The timing compensation device comprises a fractional frequency division module, a filter, an edge detection module, a pulse synchronization module, a phase error calculation module, a baud rate counter and a synchronization identification module. The 2tq width pulse interference is filtered out through the optimized burr suppression mechanism, and the stable transmission of the bus signal is ensured. The innovation expands the synchronization jump width range, breaks through the traditional 1tq-4tq limitation, and improves the phase error correction capability. The intelligent state discrimination algorithm is used to accurately distinguish the leading, lagging and non-synchronization states. The baud rate counter value is directly corrected through the phase error quantization calculation module, the quantitative correction of the timing error is realized, and the stability of the bus communication and the data transmission accuracy are effectively improved.

This invention discloses a multi-channel ultrasonic pulse synchronization method based on interpolation and autocorrelation detection, belonging to the field of ultrasonic signal synchronization. The method includes: a transmitting FPGA generating a set of in-phase and quadrature signals and sending them to a receiving FPGA; the transmitting and receiving FPGAs respectively generating local bit synchronization clocks using the in-phase and quadrature signals; after the bit synchronization clocks are established, the transmitting FPGA sends a pulse sequence to the receiving FPGA that needs to establish synchronization; the transmitting and receiving FPGAs respectively detect the pulse sequence, and if the detection is successful, pull up the synchronization status indicator signal; if the synchronization status indicator signal is detected to be high, the chips of the ultrasonic system's transmission and acquisition boards controlled by the transmitting and receiving FPGAs are reset. This invention, as a multi-channel ultrasonic synchronization method, can achieve high-precision synchronization between multiple instruments under long-distance and large interference conditions, thus meeting the requirements for ultrasonic phased array detection.

The application discloses a kind of lightweight binary transmission methods based on impulse synchronization reaction diffusion neural network, belong to safe communication and control engineering field.The method is by constructing drive-response reaction diffusion neural network system, and impulse control is applied in response end, to realize the safe transmission and recovery of binary text information.Sending end converts plaintext into continuous time modulation signal superimposed to drive system, and receiving end uses synchronization error to complete demodulation and plaintext recovery.Compared with continuous control method, the application has the advantages of low communication overhead, simple implementation, suitable for resource limited equipment, etc.

The embodiment of the application provides a resource perception-based self-triggered hierarchical pinning pulse synchronization control method and system, and relates to the technical field of automation control. The method first establishes a complex dynamic network model of a target system, and generates hierarchical network structures of a leader layer and an interactive following layer based on an invariable pinning mechanism. Then, control inputs are designed according to the complex dynamic network model and the hierarchical network structures, and then the pinning pulse synchronization control is performed on the target system according to the control inputs. For the leader layer, self-triggered driven pulse pinning control is designed, a constrained node set containing multiple nodes is determined in advance, the proportion of effective control nodes is improved, the required pulse frequency is reduced while the synchronization performance is ensured; for the interactive following layer, self-triggered control is designed, the controlled nodes determine the control application time according to the local state, global error information and centralized scheduling are not required, and the occupation amount of communication and calculation resources is reduced.

This invention relates to the field of multi-branch floating ground power supply technology, and discloses a pulse-injection method for dual-parameter detection and estimation of residual current and insulation resistance. The method includes: injecting a symmetrical positive and negative pulse with zero net charge between the power supply midpoint and the grounding terminal; simultaneously acquiring the differential current and midpoint voltage of each branch; symmetrically decomposing the pulses to separate the steady-state leakage current component and the transient return current component; using the time integral of the total return current component to invert the capacitance time constant, insulation time constant, and capacitance weight; then extracting the insulation charge to obtain the global insulation resistance; using the insulation time constant to weight the transient return current component of each branch to obtain the branch leakage current ratio, mapping the output branch insulation resistance and residual current; finally, continuously fusing steady-state and transient data by generating dynamic coefficients, and adaptively updating the injection duration for the next round. This invention eliminates ring network shunt interference and achieves accurate positioning and anti-interference assessment of the dual parameters.

This invention discloses a time-frequency coordinated multi-standard signal fiber optic fusion transmission system and method, relating to the field of signal transmission technology for radio astronomy terminals. It includes: a time-frequency distribution module, a power supply and heat dissipation module, and a high-performance electromagnetic shielding module. The time-frequency distribution module aggregates external reference clock, second pulse, synchronization trigger, and gigabit network signals into fiber optic network signal output. The power supply and heat dissipation module provides power to the system and ensures heat dissipation. The high-performance electromagnetic shielding module suppresses electromagnetic leakage and external electromagnetic interference, meeting the system's electromagnetic compatibility and shielding requirements. This invention aggregates external reference clock, second pulse, synchronization trigger, and gigabit network signals into a single signal transmission, significantly simplifying the transmission link and greatly improving the cabling efficiency and maintenance convenience of complex astronomical terminal systems.

The application provides a synchronization ring network system of a network-constructed energy storage converter, and particularly relates to the technical field of power electronic system control and communication network synchronization, and the system comprises: a plurality of energy storage converters, each of which is configured with a synchronization ring network controller, and the controllers are connected in a head-to-tail mode through communication interfaces to form a ring communication network; two of the energy storage converters serve as master control devices; the controllers of the two master control devices respectively generate one second pulse synchronization signal, and the two signals are simultaneously transmitted in the ring network; the controller of each master control device is configured to receive and compare the two second pulse signals in real time through the ring network, and when the deviation exceeds a preset threshold, the time of subsequent signal transmission is adjusted to correct the deviation. While ensuring the high reliability of the ring synchronization network, the application fully develops the parallel potential of the dual master control redundant architecture in the physical layer high-precision clock synchronization scene, and ensures the unity of seamless redundancy and dynamic high-precision maintenance of the synchronization reference.

The application discloses a pulse synchronization method, an electronic device, a storage medium and a program product. The method comprises the following steps: acquiring a period quantity sequence generated by local clock counting; performing quality evaluation on a signal according to the period quantity sequence to determine a current signal state; determining a target count value according to the current signal state, and latching the target count value to a corresponding cache space after a latching condition is met; acquiring a current target count value from the cache space, and outputting a pulse synchronization signal based on the current target count value, wherein the pulse synchronization signal is used for pulse synchronization, thereby solving the problem of inaccurate pulse signal synchronization, obtaining a stable target count value, and effectively avoiding problems such as unstable time synchronization and poor precision caused by environmental factors; and counting the output pulse synchronization signal through the current target count value, controlling the output of the pulse synchronization signal, realizing pulse synchronization, and improving synchronization precision and stability.

This invention relates to a SAR multi-sub-region imaging radio frequency simulation method and system with coordinate system periodic reconstruction. The method includes a SAR echo simulator receiving, according to the communication cycle, the aircraft's latitude, longitude, altitude, velocity, and acceleration simulated by the simulator, as well as the center latitude, longitude, and altitude of the SAR sub-region to be imaged on the aircraft. It receives the SAR's radio frequency excitation signal, clock signal, and radar pulse synchronization signal via an radio frequency cable, and receives the SAR beam pointing angle transmitted by a bus fast-access device. The SAR echo simulator performs SAR echo simulation of a single sub-region through coordinate system reconstruction, radar beam ground center point correction, online sub-region switching, scene transfer function calculation, SAR echo generation, and periodic coordinate system cancellation, generating SAR echoes for a single sub-region in real time. Using the single-sub-region SAR echo simulation method, the SAR echo simulator generates SAR echoes for all sub-regions in real time during the simulation process. This invention improves the accuracy and experimental efficiency of aircraft SAR scene matching guidance radio frequency hardware-in-the-loop simulation.

This invention discloses a hardware synchronization and calibration method and apparatus for an event camera and an infrared depth camera. It uses an external hardware-triggered reference pulse synchronization signal to achieve spatiotemporal alignment between multimodal cameras, thereby obtaining complete multimodal information and their spatial positional correspondences in each acquisition and scanning cycle, thus achieving stable optimization and reconstruction. This invention utilizes the external signal triggering mode of the event camera to embed precise timestamp markers in the event stream, performing hardware-level synchronization with the infrared depth camera during the exposure cycle to achieve deterministic timestamp alignment. This invention detects and corrects timestamp information that deviates continuously during the camera acquisition process, employing a flashing checkerboard calibration method to achieve simultaneous calibration of the event camera and the infrared depth camera. Finally, the effectiveness of the synchronization and calibration between multimodal cameras is verified through projection and back-projection methods, with the error of the joint calibration of intrinsic and extrinsic parameters controlled within 0.3 pixels.