24 results about "Strong pulse" patented technology

The present invention discloses a pulse generator and a pulse rod, which relate to the field of pulse circuit technology. The pulse generator includes a frequency control unit, a dual closed-loop pulse amplification unit, a digital signal processing unit and an adaptive power management unit. The frequency control unit includes an environmental sensor and a microcontroller. The microcontroller can calculate a preset pulse frequency based on information transmitted by the environmental sensor. The input end of the dual closed-loop pulse amplification unit can receive a pulse signal transmitted by the microcontroller, amplify it to a preset pulse frequency, and provide a pulse current to an electrostatic elimination needle. The digital signal processing unit can digitize the pulse signal to enhance the anti-interference ability of the pulse signal. The adaptive power management unit includes a dynamic voltage regulation module electrically connected to an external power supply, and the dynamic voltage regulation module can dynamically adjust the output voltage. The technical solution provided by the present invention can provide a pulse generator with high stability, a wide adjustment range and strong anti-interference ability.

The invention discloses a crack defect detection method and system based on a pulse neural network. The method comprises the following steps: collecting an eddy current detection signal of a turbine blade and converting the eddy current detection signal into a pulse sequence; performing feature extraction of different scales on the pulse sequence in sequence, and fusing the extracted features of different scales to obtain a feature extraction pulse sequence; carrying out attention enhancement processing on the feature extraction pulse sequence in a time dimension to obtain a time enhanced pulse sequence; converting the spatial features of the time enhanced pulse sequence into frequency domain features, and weighting the frequency domain features to obtain weighted frequency domain features; converting the weighted frequency domain features into spatial features to obtain pulse signals; and performing crack defect detection according to the pulse signal. According to the method, the feature representation capability is enhanced through multi-scale feature extraction and fusion, the feature representation efficiency is improved through enhancement of time, space and frequency domains, and the training complexity is reduced while the detection precision is ensured.

The invention provides a swivel bolt pre-tightening force monitoring device and method under a high temperature condition. The device comprises a magnetostriction sheet, a coil-only type EMAT detection probe, a multi-channel EMAT detection circuit and a signal processor, during monitoring, the magnetostrictive sheet is coupled with the swivel bolt, and the detection probe is placed around the swivel bolt; the detection circuit continuously introduces similar direct current into the plurality of coils of the detection probe and simultaneously introduces strong pulse current into each coil according to a preset sequence; the detection probe comprises a plurality of coils which generate a magnetic field under the action of introduced similar direct current; the magnetostrictive sheet generates telescopic vibration in a magnetic field, so that ultrasonic waves are generated on the surface of the swivel bolt; the detection probe receives an ultrasonic echo signal; and the signal processor analyzes the echo signal and extracts pre-tightening force information of the swivel bolt. According to the invention, on-line monitoring of the pre-tightening force of the swivel bolt under a high-temperature condition can be realized.

The application discloses an in-loop enhancement method for super-low code rate video coding based on artificial intelligence, and relates to the technical field of artificial intelligence, which comprises the following steps: step 1: obtaining a reconstructed frame generated by a current decoder as a visual input and a current code rate indicator as a control input; generating an initial pulse event stream containing event timestamps and polarity and a pulse timing consistency graph thereof; step 2: under the constraint of the pulse timing consistency graph, performing pulse consistency re-estimation and asynchronous residual back-annotation based on interleaved phase cross-checking; step 3: under the control of in-loop closed-loop and code rate collaborative regulation, generating a pulse reconstruction enhancement frame by using the enhanced pulse event stream, and replacing a reference frame with the pulse reconstruction enhancement frame. The application can significantly reduce the cross-frame distortion accumulation risk, improve the subjective viewing quality and the reliability of the reference frame, and has practical application value in low-bandwidth transmission and limited storage scenarios.

The invention discloses a mud pulse decoding method, device and equipment for directional drilling, a medium and a product, and relates to the technical field of directional drilling, the method is based on a multi-channel pressure sensor, and a mud pulse signal is obtained; fusing the mud pulse signals by using a multi-sensor signal fusion technology to generate fused pulse signals; recognizing and filtering noise in the fused pulse signal through a self-adaptive noise elimination algorithm to obtain a noise filtering pulse signal; modulating and demodulating the noise filtering pulse signal to obtain an enhanced pulse signal; according to the mud transmission distance, the mud flowing pressure and the mud flowing speed which are monitored in real time, the pulse intensity of the enhanced pulse signal is adjusted, and a recovery pulse signal is determined; and carrying out decoding and error code correction on the recovery pulse signal to obtain a decoding result. A high-precision decoding result can be obtained, and the drilling operation efficiency is improved.

This invention discloses an electromagnetic ultrasonic online monitoring probe, device, and method for steam pipelines with a coating layer. The probe includes: a butterfly coil for supplying a DC-like current, or simultaneously supplying a DC-like excitation current and a strong pulse excitation current; and a zigzag coil for supplying a strong pulse excitation current. The zigzag coils are unequally spaced, with the spacing gradually decreasing from the input end to the output end. Supplying a DC-like excitation current into the butterfly coil generates a bias magnetic field; supplying a strong pulse excitation current into the butterfly coil excites ultrasonic body waves, while supplying a strong pulse excitation current into the zigzag coil excites ultrasonic guided waves, thereby enabling pipeline wall thickness and defect detection. The guided waves excited by the unequally spaced zigzag coils exhibit Chirp signal characteristics, allowing for pulse compression to improve the signal-to-noise ratio and resolution of the ultrasonic echo signal. The probe is small in size, unaffected by Curie temperature, and suitable for continuous high-temperature detection and detection in narrow areas.

The invention discloses a nonlinear effect and dispersion effect-based performance optimization method for an interferometer and [phi]-OTDR fusion system, and the method achieves the performance optimization of the interferometer and [phi]-OTDR fusion system through the nonlinear effect and dispersion effect generated by pulsed light and continuous light. According to the method, spectrum broadening of a detection signal is realized through pulse light self-phase modulation; frequency conversion is realized through four-wave mixing, and idler frequency light is generated; pulse compression is realized by using a continuous light group velocity dispersion effect, and pulse peak power is enhanced; the obtained pulsed light and continuous light are respectively demodulated to obtain high-fidelity and high-precision external disturbance information, so that the restrictive relationship between the spatial resolution and the sensing distance of the traditional phi-OTDR system is broken, and the spatial resolution and the signal-to-noise ratio of the fusion system are improved.

The application provides a time delay-Doppler joint estimation method under polar pulse noise interference. On the basis of the orthogonal matching pursuit algorithm, the maximum correlation entropy criterion and the l1 norm constraint are introduced to enhance the robustness under the pulse noise, and a fast solving algorithm based on a distributed iterative optimization strategy is used to improve the calculation efficiency. Compared with the existing same type estimation method, the method has a wider application range, higher estimation accuracy and stronger robustness.

The invention provides a current sensing method and a related device based on quantum coherence enhanced pulse and state space, and the method comprises the steps: carrying out the quantum state initialization of a diamond NV color center, combining a to-be-detected signal magnetic field with an environment electromagnetic interference magnetic field, constructing a pulse Hamiltonian with phase compensation, and carrying out the detection of the state space. A microwave pulse sequence acts on initialized quantum state evolution calculation, and a fluorescence intensity modulation signal is obtained through measurement; demodulating the signal to obtain a demodulated current signal of the signal magnetic field to be detected; based on the demodulation current signal and the conductive EMI noise, constructing an EMI observer through classical state space filtering and outputting a compensation signal, and performing cross-correlation cooperative processing on quantum output and classical output to obtain a cooperative filtering signal; and coding the collaborative filtering signal into a quantum state, and sequentially performing unitary transformation and quantum state probability amplitude measurement to obtain a current value of the signal to be measured. According to the invention, the wide-range current measurement precision in a strong electromagnetic field environment can be improved, the electromagnetic interference is suppressed, and the temperature stability is improved.

The application discloses a kind of cyclotron high-current beam pulsing method and device, the device includes along the ion source to accelerator direction, it is arranged on the beam cutter A of accelerator beam injection line, beam cutter B, and it is arranged on the stripping film of accelerator beam outlet, the stripping film that is arranged on the accelerator beam outlet, stripping off n overlapping pulse beam at the same time;The method comprises: when n+m turns of beam bunch in a period of beam cutter A have 4*n high-frequency period beam bunch enter cutter B, utilize beam cutter B to realize in a pulse period, n high-frequency period beam bunch can pass, and the remaining n*3 high-frequency period beam bunch cannot pass;Overlapping of n turns of pulse beam is realized at stripping film, so that stripping film strips n overlapping pulse beam negative hydrogen beam bunch at a time, and the beam current intensity is increased by n times.The application finally realizes peak current intensity pulse beam, and compared with prior art current intensity, it is increased by nearly 20 times.

The present application relates to battery swap cabinet electromagnetic compatibility and RFID identification technical field, especially in kind based on the battery identification battery swap method of RFID, this method includes: according to the rising amplitude, duration and waveform steepness of signal strength sequence determines the interference of battery swap cabinet capture pulse train, determines the interference intensity;When the interference intensity is strong pulse, according to the voltage sequence and signal strength subsequence determines the cross-correlation peak;When the pulse train interference is successfully coupled to the sampling circuit, determine the positive feedback level;Determine the anti-interference level to execute the anti-interference strategy.The present application is through the three parameter sliding window grading of pulse train interference, the cross-correlation coupling verification of received signal strength indication sequence and battery management system voltage and the collaborative analysis of common mode current positive feedback index, effectively solve the technical problem that the anti-interference response is blind and the battery swap process is easily interrupted by harmless interference due to the fact that only the existence of pulse group is detected without verifying whether the interference is truly coupled to the key sampling circuit in the prior art.

The invention relates to the technical field of intelligent diagnosis of motor faults, in particular to a motor thermal imaging diagnosis method and system based on a pulse neural network and a computer readable storage medium, and the method comprises the steps: inputting a motor thermal imaging image into a self-adaptive residual coding module, and obtaining a main path coding feature and a branch coding feature through a main path and a branch; calculating a weight coefficient of each channel of the branch coding characteristics according to the main path coding characteristics; performing weighted summation on each channel of the branch coding feature and the main coding feature by using the weight coefficient of each channel of the branch coding feature to obtain a target pulse coding feature; and inputting the target pulse coding feature into a pulse residual network to obtain a motor fault category prediction label. According to the method, information loss caused in the encoding process can be reduced, the characterization capability of the pulse encoding result on the motor fault state is enhanced, and the motor fault diagnosis precision is improved.

The invention relates to the field of decoking, in particular to a thermal power plant external peeping type flame detection sleeve air flow pulse decoking device which comprises a spray head piece, a plurality of power assisting holes, a plurality of air flow pulse decoking devices and a plurality of air flow pulse decoking devices. The sensing assembly is located in the spray head part; the adjusting assembly is movably arranged on the outer side of the spray head part; when the sensing assembly moves in the first direction, the adjusting assembly is driven to movably change the medium flow of the assistance hole. The coke cleaning device has the beneficial effects that through linkage of the sensing assembly and the adjusting assembly in the coke cleaning device, the resistance change in the coke cleaning process is automatically sensed, and the forward thrust is correspondingly adjusted. When encountering stubborn coke blocks, the device can automatically pressurize and break obstacles, and can automatically depressurize and stably move when passing through a smooth area, so that the self-adaptive control of the coke cleaning process is realized; by instantly maximizing the flow of the power-assisted hole and generating strong pulse-type thrust, coke blocks can be effectively crushed, cleaning of difficult areas can be completed without manual intervention, and the success rate of coke cleaning is remarkably improved.

The invention discloses an ultra-low bit rate video coding and decoding in-loop enhancement method based on artificial intelligence, and relates to the technical field of artificial intelligence, and the method comprises the steps: 1, obtaining a reconstruction frame generated by a current decoder as a visual input, and obtaining a current bit rate indication quantity as a control input; generating an initial pulse event stream containing an event timestamp and polarity and a pulse time sequence consistency graph of the initial pulse event stream; 2, under the constraint of the pulse time sequence consistency graph, pulse consistency reestimation and asynchronous residual error reinjection based on staggered phase rechecking are executed; and step 3, under the control of in-loop closed loop and code rate cooperative adjustment, generating a pulse reconstruction enhanced frame by using the enhanced pulse event stream, and replacing a reference frame with the pulse reconstruction enhanced frame. According to the method, the cross-frame distortion accumulation risk can be remarkably reduced, the subjective watching quality and the reliability of the reference frame are improved, and the method has the practical application value in low-bandwidth transmission and limited storage scenes.

This invention discloses an experimental apparatus and method for enhancing oil recovery through high-frequency pulsed CO2 injection, relating to the field of oil and gas extraction technology. The apparatus includes a high-frequency pulsed injection module, a pulse waveform adjustment module, and a nuclear magnetic resonance (NMR) module. The high-frequency pulsed injection module comprises a first pneumatic valve, a second pneumatic valve, and a pneumatic valve controller. The first pneumatic valve is connected to a high-pressure CO2 source, and the second pneumatic valve is connected to a low-pressure CO2 source. The pneumatic valve controller controls the first and second pneumatic valves to interlock and instantaneously switch according to pulse parameters, generating high-frequency pressure pulses. The pulse waveform adjustment module adjusts the waveform of the high-frequency pressure pulses. The NMR module, based on the adjusted high-frequency pressure pulses, alternately injects high-pressure and low-pressure CO2 into the experimental core, collects NMR data of the experimental core before and after pulsed injection, and generates an adjustment signal to adjust the pulse parameters. This invention can achieve instantaneous pressure changes and enhance the pulse effect.

The application provides a power line carrier channel adaptive equalization method and system for underground coal mines, relates to the field of power line carrier communication, and solves the technical problems of slow convergence speed, large steady-state error and insufficient tracking ability of the adaptive equalization method in the prior art under the time-varying channel and strong pulse interference environment of underground coal mines. The method comprises the following steps: receiving a carrier signal and converting it into a discrete time signal sequence, carrying out wavelet packet decomposition to obtain a subband signal, and calculating a kurtosis value; discriminating the channel state according to the variance of the kurtosis value, and calculating an equalizer step factor by using a state-driven nonlinear compound variable step control law; inputting the signal into a structured decision feedback equalizer embedded in a physical transmission characteristic model constraint; and outputting an equalized signal based on the step factor and the model constraint to adjust the tap coefficient. The application significantly improves the reliability of power line carrier communication in underground coal mines.

This invention relates to the field of mud pulse generator technology and discloses a mud pulse generator structure, including a suspension section, a fixed block, a main shaft, a rotor, and a stator. The rotor blades transition in a circular wedge shape from top to bottom. The mud pulse generator structure also includes a pressure spring, a clamping ring, and multiple Venturi flow channels. The pressure spring is placed in a slide rail within the suspension section, with its upper end abutting against the lower end face of the stator. The clamping ring is fixed within the suspension section, with its upper end face abutting against the lower end of the pressure spring. Multiple Venturi flow channels are placed in the flow grooves of the fixed block. From top to bottom, each Venturi flow channel includes an inlet straight section, a contraction section, an expansion section, and an outlet straight section. A negative pressure channel is connected to one side of the throat between the contraction and expansion sections. Multiple jet holes are formed around the periphery of the outlet straight section. This invention enhances the pulse signal amplitude without disrupting the regularity of the pulse signal changes, while ensuring the normal operation of the overall structure.

The utility model discloses a quantum radar detection system based on quantum correlation. The quantum radar detection system comprises a signal generation module, a beam splitter a, a signal transmission module, a beam splitter b, an imaging device, an interference module, a detector and a master control module. The utility model discloses a quantum radar detection system based on quantum correlation, which is characterized in that a signal generation module outputs adjacent continuous pulses with good quantum correlation, when two continuous strong pulses enter an interference module, the two continuous strong pulses are completely coherent and cancelled, and a detector does not have a count value; external operation (such as interception and retransmission) can destroy quantum correlation, so that the interference module cannot output completely coherent and cancelled optical signals, and then the detector is triggered to generate a great count value; therefore, whether the detection signal of the quantum radar is interfered can be judged through the counting result of the detector, the judgment mode is simple and convenient, the error rate is greatly reduced, and the method is widely applied to the unmanned system and navigation field.

The utility model provides a mud pulse measurement-while-drilling device for a rotary valve. The mud pulse measurement-while-drilling device comprises a body, the motor is arranged in one end of the body, and a connecting shaft is fixedly mounted at the output end of the motor; the valve body is fixedly mounted at one end of the outer side surface of the body; and the stator is arranged in the valve body. According to the mud pulse measurement-while-drilling device for the rotary valve, the stator and the rotor are matched with each other, stable and strong pulse signals can be generated when the mud pulse measurement-while-drilling device is used, the transmission efficiency of the mud pulse signals in a mud medium is improved, the overall efficiency of drilling operation is improved, and the drilling efficiency is improved. The signal detectability and the data transmission reliability are enhanced, the system can adapt to complex drilling environments such as high pressure, high temperature and high mud density, and smooth drilling operation is guaranteed.

The application discloses an electromagnetic ultrasonic adaptive filtering method applied in a 27.5KV / 50Hz strong electromagnetic environment and belongs to the technical field of nondestructive testing and signal processing. Aiming at how to effectively suppress strong periodic power frequency interference and strong random pulse interference and how to extract electromagnetic ultrasonic echo signals from seriously distorted signals with high fidelity, the method comprises the following steps: firstly, signals of a main channel and a reference channel are synchronously collected, and when an instantaneous amplitude exceeds a preset dynamic threshold, it is determined that strong pulse interference exists through real-time amplitude detection; then, the repaired reference channel signal is taken as input, and periodic power frequency interference in the main channel is cancelled through a least mean square adaptive filter; finally, a method based on singular value decomposition and singular value differential spectrum peak is used to suppress residual broadband background noise. The application can extract electromagnetic ultrasonic echoes from seriously distorted signals with high fidelity, and effectively solves the problems of signal distortion under pulse interference and poor power frequency cancellation effect of a traditional method.

The application discloses a cross-patient seizure detection method based on a graph-enhanced pulse state space model, first, the brain electrical signal data of a patient is acquired and an electrode space topology graph is constructed; then, a pulse state space model is used to extract the time sequence features of physiological channels, and a pulse graph convolution network is used to perform message aggregation between adjacent nodes in a discrete pulse domain across time steps; finally, feature aggregation is performed through a global average pooling operation at a graph level, and a two-class prediction probability is output through a fully connected classifier. The application follows the design logic of "first time and then space", the pulse state space model models the potential brain state dynamics of the time sequence change, and realizes stable long context feature processing through the cyclic updating mode of the adaptive hardware; the pulse graph neural network completes the information transmission and fusion between channels based on the electrode correlation graph, can capture the spatial dependence relationship which is crucial for the representation of seizures, reduces the calculation energy consumption, and improves the overall performance.

The invention discloses a non-contact heart rate measuring system based on structural vibration sensing, which comprises the following steps that: step 1, a vibration sensing module captures vertical velocity vibration which is transmitted through a floor and is caused by heartbeat to generate an analog electric signal, de-noising, amplifying and adjusting the analog electric signal, and converting the analog electric signal into a digital signal through an analog-to-digital converter; step 2, a signal processing module carries out filtering processing on the signal, enhances a pulse type heartbeat signal, suppresses oscillation noise of mechanical vibration, extracts a signal envelope, and separates out heartbeat features; 3, a heart rate calculation module performs peak detection and periodic mode matching on the processed digital signals, heartbeat and instantaneous noise are distinguished through semi-periodic characteristics, and a heart rate value is output according to a matching result; and 4, evaluating the reliability of the heart rate measurement result by a confidence evaluation module, calculating a confidence score, and deciding whether to output a heart rate estimation value of a corresponding window or not by utilizing a confidence threshold.

The invention discloses a quadrupole nuclear two-dimensional high-resolution solid NMR method based on five-quantum excitation enhancement, and the method comprises the steps: carrying out the optimization of a frequency offset satellite transition selective flip pulse based on a first change hill climbing algorithm, obtaining an LP-opt pulse, designing an LP-opt 5QMAS pulse sequence, and carrying out the time sequence of the LP-opt 5QMAS pulse sequence, the method sequentially comprises a layout number transfer enhancement pulse, a first center transition selective excitation pulse, a first LP-opt pulse, a second LP-opt pulse, a second center transition selective excitation pulse and a third center transition selective excitation pulse. According to the invention, high-order quantum transition effective excitation which is difficult to excite by a traditional rectangular pulse method is realized. Especially for a nuclear spin system with a large nuclear quadrupole interaction constant (CQ) generated due to asymmetry of a local structure, the five-quantum excitation material shows excellent five-quantum excitation efficiency in a 5QMAS experiment.

The invention discloses a picosecond pulse source device with adjustable amplitude and a fast rising edge, and belongs to the technical field of electronic circuits. According to the pulse source device, the fast rising edge and narrow pulse width of a positive pulse signal are ensured, and meanwhile, amplitude and repetition frequency adjustment is carried out on the pulse signal generated by the Marx circuit; two triggering signal modes of internal triggering and external triggering are supported, and the internal triggering signal generating circuit can generate internal triggering signals with adjustable repetition frequency; the Marx circuit outputs a pulse signal after receiving the trigger signal, the Marx circuit is debugged, the output is reversely connected, a high-amplitude and fast-rising-edge positive pulse signal is generated, and the positive pulse signal with the adjustable amplitude is output through the amplitude adjusting module. The device disclosed by the invention is integrated in a cavity, so that the reliability and convenience of the pulse source are enhanced; the invention has the advantages of simple operation, small size and the like, is beneficial to modularization, has adjustable amplitude and faster rising edge, and can meet the requirements of amplitude and repetition frequency conditions in different application scenes.