190 results about "Signal edge" patented technology

The invention discloses an automatic identification and expansion communication method based on an RS485 interface, and relates to the technical field of industrial automation communication. The problems that an existing RS485 interface is complex in configuration, poor in protocol compatibility and high in data transmission delay are solved. According to the scheme, the terminal matched resistance and the bias current are adjusted in real time by dynamically measuring the bus equivalent distributed capacitance value, and signal attenuation caused by the capacitance effect is inhibited; a silicon controlled rectifier trigger type charge discharge mechanism is adopted to force bus residual charge to return to zero quickly, and an idle state is accurately judged in combination with a hysteresis comparator; dynamically compensating signal edge distortion and calibrating a sampling window time sequence based on a pre-emphasis filtering and Kalman filtering algorithm; multi-node stable communication is realized through capacitance value driven conflict detection threshold adaptive adjustment and a Poisson back-off model; according to the invention, the real-time performance, the anti-interference capability and the multi-node expansion reliability of RS485 communication in a complex industrial scene are obviously improved, and the debugging and maintenance cost of the system is reduced at the same time.

The invention relates to the technical field of high-speed rail platform safety monitoring, and discloses a high-speed rail platform area intrusion detection and early warning alarm system, which comprises an acoustic and vibration sensor network deployed in a platform area and used for collecting environment signals in real time, the edge calculation unit extracts signal features and compares the signal features with a dynamically maintained environmental rhythm feature baseline to generate a detuning event mark, and the detuning mode analysis device identifies an abnormal mode through space-time correlation and triggers an alarm. According to the method, early perception of subtle anomalies is realized by constructing a multi-modal environment rhythm baseline, active perturbation injection and differential response analysis technologies are combined, the recognition capability of a silent target is remarkably improved, meanwhile, the monitoring continuity under an extreme working condition is ensured by using an elastic baseline adaptive mechanism, and the detection accuracy is improved. And a closed-loop security and protection system from passive sensing to active discrimination is formed.

The invention relates to the technical field of backscatter communication, and discloses a backscatter method for any multi-frequency Bluetooth carrier, which comprises the following steps: a carrier device can send out carrier signals of multiple frequencies; the label modulates label data into a carrier signal to generate a backscattering signal; an edge device identifies a serial number of a corresponding connection event through a data packet in a specific data channel and sends the serial number of the connection event to a label, and the label calculates a corresponding data channel serial number according to the serial number of the connection event, so that the label can reflect carrier signals of different data channels to a fixed channel; identification fields are arranged in data packets corresponding to the carrier signals and the backscattering signals, and label data are decoded based on identification field contents and load contents of the carrier signals and the backscattering signals. The label can accurately control the reflection channel, and meanwhile label data transmission is supported through a provided coding and decoding mechanism.

The invention relates to the technical field of stoma nursing devices, and discloses an AI visual stoma leakage early warning system, which comprises a plurality of passive piezoelectric film sensors embedded in a stoma chassis and used for capturing acoustic signals generated by adhesion interface structure instability; the edge calculation unit periodically collects an electric signal sequence and calculates an information entropy value, and through comparison with a self-adaptive resting entropy baseline, the structural instability risk is judged and early warning is generated when the entropy value continuously and abnormally rises. The risk orientation is accurately identified in combination with a multi-sensor cooperative positioning technology, body movement interference is avoided by using a dynamic compensation mechanism, and the early warning accuracy and clinical practicability are improved.

The invention provides a signal clock recovery method and device for high-speed serial data and communication equipment, and relates to the technical field of digital signal processing, and the method comprises the steps: carrying out the histogram statistical analysis of a collected signal based on a voltage direction, and obtaining a probability density curve; obtaining a bottom value and a top value based on the probability density curve; obtaining a high level threshold value and a low level threshold value based on the bottom value and the top value; based on the high level threshold value and the low level threshold value, extracting and obtaining a signal edge cross point sequence; calculating a signal edge cross point difference value based on the signal edge cross point sequence; and performing clock recovery based on the signal edge cross point difference to obtain standard clock data. Through the steps, the problem that in the prior art, the reliability of generating the jitter signal is relatively low is solved.

The invention discloses a primary and secondary fusion pole-mounted circuit breaker state monitoring system and method, and relates to the technical field of power system automation. The system comprises a native signal acquisition module which is used for multiplexing an inherent electrical loop of a circuit breaker and acquiring a current signal of an opening and closing coil and a capacitive reactance change signal of a parasitic capacitor between a high-voltage electrode and a grounding end; and the edge analysis module is used for processing the signal acquired by the original signal acquisition module, including generating a mechanical health degree through feature extraction and state mapping, calculating an insulation aging index based on capacitive reactance change, and dynamically correcting a monitoring reference in combination with a digital twin model and a filtering algorithm. Non-auxiliary element monitoring is realized by multiplexing the inherent electrical loop of the circuit breaker, so that the service life of the monitoring system and the service life of primary equipment are completely synchronous, and elements do not need to be replaced in the whole life cycle; errors introduced by additional sensors are avoided by using the original electrical signals, and the mechanical fault recognition and insulation state evaluation precision is remarkably improved.

The invention discloses a distributed wireless control system and method for transformer winding deformation detection. The distributed wireless control system comprises a plurality of transformers, a first deformation detection device, a second deformation detection device, an edge computing server and a cloud platform, wherein the first deformation detection device and the second deformation detection device are electrically connected with windings of the transformers; the first deformation detection device is used for generating a first fault signal when a winding deformation fault is detected; the edge computing server is used for analyzing according to the type of the fault winding and the short-circuit impedance variable quantity to obtain a first fault credibility level; and the cloud platform is used for obtaining the second fault credibility according to the historical data of the transformer winding, and determining a fault secondary judgment strategy according to the first fault credibility level and the second fault credibility. According to the invention, two different types of winding deformation detection devices are arranged to work cooperatively, and a secondary judgment strategy is executed based on judgment of the fault credibility level and the fault credibility, so that the problem of deformation fault false alarm in actual work is reduced, and the accuracy and reliability of deformation fault detection are improved.

Provided are a data transmission circuit system and a data reception circuit system, which use an edge of a pulse signal. The data transmission circuit system modulates a digital signal by using time levels determined by time differences between rising edges (or falling edges) of a clock pulse signal and rising edges (or falling edges) of a data pulse signal. The data reception circuit system demodulates a digital signal by using time levels determined by time differences between rising edges (or falling edges) of a recovered clock pulse signal and rising edges (or falling edges) of a data pulse signal.

The invention discloses a high-precision power control method for high-power pulse output of a radio-frequency power supply, which comprises the following steps of: acquiring a radio-frequency emission signal before power amplification of a radio-frequency emission circuit in the high-power radio-frequency power supply to obtain an emission feedback signal TXFB, and acquiring a coupling signal of a detection circuit to obtain an emission feedback signal TXFB; obtaining a forward power feedback signal FWD and a reflection power feedback signal RFL of the radio frequency emission signal; processing the acquired TXFB, FWD and RFL, and calculating the power value of each signal; according to the pulse signal edge, synchronously selecting effective signal power values of TXFB, FWD and RFL; correcting a signal power value of the FWD according to the TXFB; the signal power value change trend of the TXFB and the corrected FWD is analyzed, and the response delay of the TXFB passing through the power amplification circuit is estimated; and calculating forward power output by the radio frequency power supply after response delay, judging whether the forward power is within an allowable range or not, if so, outputting the power to meet the requirement, and otherwise, continuing closed-loop power adjustment. The control precision and the response time of the pulse output power can be improved.

The invention relates to the technical field of rail traffic monitoring, and discloses an urban rail vehicle driving analysis system based on digital twinning, which is characterized in that vehicle vibration and traction motor current signals are collected in real time through a vehicle-mounted sensing unit, and an edge feature extraction unit calculates energy ratio features of a predefined fault frequency band; the data transmission unit transmits the characteristic data and the working condition information to a digital twin platform, a digital fault tree model is arranged in the platform, and a cross-physical domain fault conduction path is analyzed and recognized through multi-source data coupling. Through combination of frequency band energy ratio characteristics and fault tree logical reasoning, electromechanical coupling fault risks which cannot be found by traditional isolated monitoring are effectively captured, meanwhile, a diagnosis threshold value is dynamically adjusted according to the wheel-rail adhesion state, and the diagnosis reliability under the complex working condition is improved.

The invention discloses a switch cabinet anti-explosion multi-parameter rapid identification and alarm method, and relates to the technical field of power equipment safety, and the method comprises the steps: obtaining a known switch cabinet historical fault record, analyzing the attribute preference and occurrence rule of different faults, constructing a multi-modal time sequence fault diagnosis model, and generating a fault knowledge base; operating parameters are monitored in real time, a field programmable gate array is used for solidifying primary judgment logic, and if the current change rate and the arc light signal intensity exceed preset threshold values at the microsecond level at the same time, a primary fault trigger signal is generated; the edge intelligent calculation unit automatically extracts the original data of the multi-source heterogeneous sensor in a set time window before and after the triggering moment, and substitutes the original data into the multi-modal time sequence fault diagnosis model to obtain a diagnosis result and a risk level of a known switch cabinet fault; and in combination with the multi-modal time sequence fault diagnosis model, executing a layered response mechanism. The beneficial effect of the invention is that the fault loss is reduced.

The invention discloses a brain-computer interface interaction control device and method based on multi-mode brain signal fusion. The device comprises a perception acquisition layer, an edge processing layer, a fusion decoding layer, a control application layer and a closed-loop optimization cloud platform. The sensing acquisition layer synchronously acquires multi-modal brain signals; the edge processing layer adopts a condition alignment time sequence diffusion model to carry out signal enhancement and completion; the fusion decoding layer realizes multi-modal feature fusion and intention decoding through a lightweight graph neural network; the control application layer provides adaptive control mapping and multi-mode feedback; and the closed-loop optimization cloud platform realizes continuous performance optimization through federated learning and incremental learning. According to the method, the problems of single signal, insufficient precision and poor practicability of a traditional brain-computer interface are effectively solved, the decoding precision, the real-time performance and the individuation degree of the system are remarkably improved, and the method can be widely applied to the fields of intelligent home control, medical rehabilitation training, industrial control and the like.

A phase locked loop (PLL) includes a phase detector configured to receive a reference signal and a feedback signal, wherein the reference signal has a reference frequency, sample the feedback signal, and output a phase detection signal indicative of a phase of the feedback signal. A voltage controlled oscillator is configured to generate an output signal based on the phase detection signal. The output signal has an output frequency greater than the reference frequency. Feedback circuitry is configured to detect a signal edge of the output signal and selectively supply, once per cycle of the reference signal, the detected signal edge of the output signal as the feedback signal.

The invention discloses a high-voltage positive and negative pulse detection circuit, which relates to the technical field of signal conditioning, and is characterized in that a voltage division circuit is responsible for attenuating input pulse signals, a switching diode is responsible for rectification and inputting positive and negative pulse signals into corresponding conditioning circuits respectively, and a charging circuit is responsible for maintaining pulse width characteristics of the signals; and the steepness of the signal edge is ensured by the comparator, and FPGA identification can be realized. Uncertain high-voltage pulse signals can be processed, and application scenes are diversified. The edge characteristic, pulse width and pulse direction of the pulse signal can be identified, and the signal processing capability is prominent.

Techniques for smoothing a signal are disclosed. The system partitions the portion of the data sequence into a stable subsequence and an unstable subsequence of data points. The system applies a rate of change exhibited by the stable subsequence to the unstable subsequence to create a smoothed, more stable subsequence.

A sensor device includes an output driver configured to: adjust a first time interval of the output signal between a first signal edge of a first type and a first signal edge of a second type based on a first reference value; adjust a second time interval of the output signal between the first signal edge of the second type and a second signal edge of the first type based on a second reference value; adjust a third time interval of the output signal between the second signal edge of the first type and a second signal edge of the second type based on a first data value; and adjust a fourth time interval of the output signal between the second signal edge of the second type and a third signal edge of the first type based on a second data value.

The invention provides a touch panel, a display device and a display driving method, and relates to the technical field of display, the touch panel comprises a display panel and a touch sensing layer arranged on the light emitting side of the display panel, and the display panel comprises a gate driving circuit and a plurality of control signal lines; the control signal line is electrically connected with the gate drive circuit; the first control signal line is used for receiving a first control signal sent by the time sequence control circuit at a first moment, and the second control signal line is used for receiving a second control signal sent by the time sequence control circuit in a delayed manner based on the first moment; the first control signal and the second control signal are gate drive control signals of the same type; the moment when the control signal line receives the first signal edge is earlier than the moment when the control signal line receives the second signal edge; each first signal edge of the second control signals is aligned with one second signal edge of the first control signals. Noise of the touch panel can be reduced, and the touch effect of the touch panel can be improved.

A controller and a control method for an asymmetric half-bridge power supply are disclosed. The asymmetric half-bridge power supply includes a first arm switch and a second arm switch forming a half-bridge, and a resonant circuit connected to the half-bridge. The method includes providing a duration parameter reflecting a second turn-on time of the second arm switch in a earlier switching cycle; providing a control signal to turn on the first arm switch for a first turn-on time in a later switching cycle; detecting whether the first arm switch has performed ZVS in response to a signal edge of the control signal to adjust the duration parameter accordingly; determining the second turn-on time of the second arm switch in the later switching cycle based on the duration parameter; and turning on the second arm switch for the second turn-on time after the first turn-on time in the later switching cycle.

The invention provides an APL-based signal edge acquisition method and system, and relates to the field of signal acquisition. The method is applied to an edge server, and comprises the following steps: acquiring a first signal data stream of machine equipment in an industrial automation scene; determining a working condition state based on the first signal data stream in combination with a context sensing method, and adjusting the working mode and sampling frequency of each sensor node according to the working condition state to obtain an adjusted operation instruction set; generating a system operation state report based on the first signal data stream and the adjusted operation instruction set to obtain a second signal data stream; constructing a trust framework of the industrial automation scene, and based on the trust framework, transmitting the second signal data stream to the central control system by adopting a standardized communication protocol; the standardized communication protocol is a communication protocol determined based on an adaptive protocol conversion gateway method. According to the technical scheme provided by the invention, the reliability of signal acquisition and processing is improved.

The invention discloses a building cluster cloud-edge collaborative optimization control method and device and an application architecture. The architecture comprises an edge device, a radio frequency communication LoRa module and a cloud platform. The edge device and the cloud platform realize cloud edge two-way communication through the LoRa module; the edge device comprises a sensing layer, an edge calculation core and a control layer and is used for collecting real-time building data, executing a local model predictive control algorithm MPC based on a building thermodynamics RC model and generating an optimal control instruction to drive air conditioning equipment; the cloud platform comprises a network service interface module, an optimization algorithm module and a data storage system and is used for operating a global coordination algorithm based on an alternating direction multiplier method (ADMM) and generating differentiated price signals; the edge device uploads data such as power requirements to the cloud platform, the cloud platform issues differential excitation signals to the edge device, and the edge device and the cloud platform perform collaborative iteration. According to the invention, distributed optimization control of the building cluster is realized through cloud-side cooperation, and the value of the building cluster as a power grid flexible resource is significantly improved.

The invention relates to a signal delay circuit, a data receiving chip and a debugging method, and the signal delay circuit comprises a plurality of registers and a signal selector. The plurality of registers are used for sampling enable signals and outputting delay signals based on clock edges of clock signals respectively; wherein the delays of the delay signals output by different registers are different; the signal selector is used for selecting one signal from the plurality of delay signals and the enable signal as a target enable signal, the signal edge of the target enable signal falls in an effective data interval of a data signal, and the signal edge of the target enable signal is used for indicating the time when a data receiving module reads the data signal. According to the embodiment of the invention, accurate delay control on the enable signal is realized by selecting the delay signals with different delay amounts, and the delay precision and the data reading accuracy are improved.

A testing method includes the following steps of: accessing a memory chip to put the memory chip into a write leveling mode; inputting a strobe signal into the memory chip under the write leveling mode; adjusting signal edges of the strobe signal to sample a clock state of a clock signal in the memory chip under the write leveling mode; generating a data signal according to the strobe signal under the write leveling mode; and determining types of the memory chip according to the data signal under the write leveling mode.

This invention belongs to the field of wind power equipment condition monitoring and fault diagnosis technology, specifically relating to an intelligent diagnostic device and method for blade icing based on acoustic-vibration feature fusion. It includes: a multimodal sensing unit for acquiring vibration response signals and aeroacoustic signals; a signal conditioning and synchronous acquisition unit connected to the multimodal sensing unit for conditioning and synchronous analog-to-digital conversion of the vibration response signals and aeroacoustic signals to obtain synchronized digital vibration and digital sound signals; and an edge computing and diagnostic unit connected to the signal conditioning and synchronous acquisition unit. This invention synchronously acquires and deeply fuses vibration signals reflecting the blade's structural state with specific frequency band sound signals reflecting the aerodynamic state of the blade surface, constructing an intelligent diagnostic system based on acoustic-vibration coherence analysis and machine learning models. This achieves high-precision, robust online diagnosis and early warning of blade icing conditions.

The invention relates to the technical field of semiconductor processing equipment, and discloses a plasma processing device and a plasma processing method. The plasma processing device comprises a processing chamber which comprises a lower electrode used for bearing a substrate and an upper electrode arranged opposite to the lower electrode; the edge source radio frequency power source is used for applying a first radio frequency signal to the edge area of the upper electrode and / or the lower electrode, and the first radio frequency signal is used for generating plasma in the edge area between the upper electrode and the lower electrode; the upper electrode bias radio frequency power source is used for applying a second radio frequency signal to the upper electrode; the edge bias radio frequency power source is used for applying a third radio frequency signal to the edge area of the lower electrode; wherein the second radio frequency signal and the third radio frequency signal are synchronized by a reverse pulse signal.

The invention relates to the technical field of manufacturing data processing, and discloses a production business data processing system for a discrete manufacturing workshop, which comprises an asynchronous data acquisition module for acquiring an asynchronous event pulse sequence of a discrete execution node; the mapping transformation module establishes an addressing mapping relation between an event source and a memory logic bit plane and generates an original differential bitmap; the bitmap filtering module is used for hedging paired logic flipping signals by utilizing an exclusive-OR logic self-reversal principle and filtering jitter interference at the edges of the signals so as to generate a net value difference bit plane; the state synchronization processing module performs in-situ upset updating on the state global bitmap through address offset addressing according to the bit identifier, and through a bitmap differential synchronization mechanism, asynchronous state updating without transaction lock constraint is achieved, calculation blocking generated by high-frequency pulse impact is relieved, and the real-time performance and stability of system data throughput are enhanced.

The invention discloses a high-precision digital double-mixing phase discriminator, and belongs to the technical field of time transfer. Comprising a sampling amplification module, the output end of the sampling amplification module is connected with a signal processing module, and the output end of the signal processing module is connected with a result output module; the sampling and amplifying module is used for receiving two paths of input clock signals fCLKA and fCLKB, and sampling and amplifying the fCLKA and fCLKB by cascading two paths of multi-stage D triggers, so that the phase difference of the two paths of input clock signals is reserved and amplified, and the probability of metastable state occurrence is reduced; the signal processing module is used for carrying out jitter optimization processing on the two paths of sampled and amplified signals and extracting stable signal edges; and the result output module is used for measuring the amplified phase difference according to the two paths of signals subjected to jitter optimization, and obtaining the original phase difference through scaling down. Digital amplification is adopted, analog devices are not needed, noise introduction and delay uncertainty are avoided, and therefore the linearity and reliability of measurement are improved.

Various embodiments of the present disclosure relate to a method for managing the startup of a phase-locked loop and a corresponding integrated circuit. The operation of the phase-locked loop includes a startup phase, during which a reference signal with a 50% duty cycle is applied to a phase comparator of the loop. A first frequency divider of the output signal of the loop's voltage-controlled oscillator is reset at each first-type signal edge of the reference signal. The phase comparator receives the reference signal and a feedback signal from the first frequency divider and generates a control pulse at each second-type signal edge of the reference signal, which causes the control voltage of the oscillator to increase.

A signal generating circuit and a signal generating method are provided. The signal generating circuit includes a first synchronization circuit configured to synchronize a beacon signal and a first signal edge of a clock signal to generate a first synchronization signal; a frequency dividing circuit configured to receive the clock signal and perform frequency division operation on the clock signal to generate a frequency division signal, wherein the duty cycle of the frequency division signal is 50%; a second synchronization circuit configured to receive the first synchronization signal and the frequency division signal and synchronize the first synchronization signal and a second signal edge of frequency division signal to generate a second synchronization signal; and a synthesis circuit configured to receive the second synchronization signal and the frequency division signal and perform AND operation on the second synchronization signal and the frequency division signal to output full-cycle signals.

This invention belongs to the field of power equipment monitoring technology, specifically relating to a non-intrusive monitoring system and method for switchgear fault indicators. The system includes: a non-contact optical sensing unit, installed on the outside of the switchgear panel via a magnetic structure, for acquiring the brightness timing signal of the fault indicator light; an electrical parameter acquisition unit, for acquiring the electrical parameter timing signal of the circuit associated with the fault indicator light; and an edge computing unit, deploying a fault diagnosis neural network model with a hybrid neural network architecture, for performing feature fusion processing on the two time-aligned signals, outputting a status recognition result to distinguish between correct alarms caused by line faults and false alarms caused by abnormalities in the indicator light itself. This invention achieves non-intrusive retrofitting of fault indicators in old switchgear, converting local light signals into remotely transmittable digital quantities without dismantling or modifying the cabinet or electrical circuits, and effectively identifying true and false alarms through multi-source signal fusion analysis.

The invention discloses a silo material opening discharging device and an anti-blocking method based on dredging monitoring. The discharging device comprises a discharging barrel, a dredging executing mechanism, an annular sensor matrix and a control center. The anti-blocking method comprises the following steps: acquiring a pressure signal of a flowing material; the edge computing gateway decouples and preprocesses the pressure signal, and outputs a standardized time sequence data sequence; the AI analysis unit is used for extracting spatial features, time domain features and frequency domain features of the multi-dimensional monitoring data, inputting an attention mechanism for fusion, and inputting a fusion feature vector into a blockage prediction model for state reasoning; controlling a hierarchical grooming action according to a reasoning result; according to the anti-blocking method based on monitoring and dredging of the discharging device, sensing, calculation, AI reasoning and intelligent execution are integrated, an intelligent control closed loop is formed, manual experience and intermittent operation can be replaced, and continuous, autonomous and intelligent anti-blocking guarantee in the discharging process is achieved.