175 results about "Weak signal" patented technology

The application discloses a kind of light field regulation detection method and device based on computing spectral reconstruction, belong to spectral analysis technical field.The method is by introducing medium-metal composite nanostructure, integrates metal nanoisland array and silicon nitride nanocolumn array on quartz substrate, realizes electric field enhancement using the local surface plasmon resonance effect excited by metal nanoisland array, simultaneously realizes wide spectral range phase coding by medium nanocolumn array;Super surface chip is integrated with single point detector, combines pre-calibrated super surface sensing matrix A and enhancement factor matrix E, and reconstructs spectrum using compressed sensing or Tikhonov regularization algorithm.The application keeps the advantages of miniaturization and no moving parts, realizes directional high sensitivity detection to weak signal, and signal-to-noise ratio is improved.

The application provides a traction motor health diagnosis method and system, the method comprising: obtaining a plurality of existing electrical signals of a traction motor from a traction control unit of a converter, and performing equal-angle resampling and data preprocessing on the plurality of existing electrical signals respectively to obtain a plurality of equal-angle dimensionless stationary signals irrelevant to rotation speed, working condition and load; performing demodulation on the plurality of equal-angle dimensionless stationary signals respectively and extracting a plurality of fault feature indexes by using a signal time-frequency analysis method; taking the plurality of fault feature indexes as inputs, applying a preset multiple-input multiple-output diagnosis model to perform fault diagnosis, and outputting a fault mode of the traction motor and a severity corresponding to the fault mode; and performing health management on the traction motor according to the plurality of fault feature indexes. The application can effectively eliminate diagnosis errors caused by PWM power supply harmonics, variable rotation speed and variable load transient processes, and improve the accuracy of non-stationary weak signal feature extraction and fault diagnosis.

Methods and systems are described for connecting devices in a manner that is quick and user-friendly. Enhanced audible communications are leveraged to bypass a need to reference a visual-based user interface. The enhanced audible communications are provided for smartphones having a virtual assistant layer. Connection scenarios including failure to connect, multiple users with multiple devices in a small or enclosed space, unexpected or undesired connections with nearby devices, weak signal, low data transmission, movement away from a range of the wireless connection, and the like are resolved. Parental controls are provided. Artificial intelligence systems, including neural networks, are trained for the connecting process. Models are developed for improving the connecting process. Related apparatuses, devices, techniques, and articles are also described.

An illustrative transmitter can achieve improvement in SN ratio and stability of the signal output under control at the transmission side, even in the case of an optical transmission line having the propagation characteristics susceptible to environmental changes. The transmitter includes: an optical transmission section configured to generate weak signal light and reference light from a transmission light pulse, and transmit the signal light and the reference light to the optical transmission line; and a controller configured to modulate pulse intensity and pulse width of the transmission light pulse according to a transmission line state of probe light having propagated through the optical transmission line.

The present application relates to the field of smart meter data acquisition, especially to a CPU occupancy-based meter data acquisition optimization method and system, the method comprising: obtaining the signal strength and working state of concentrator and meter nodes, establishing a data acquisition network model and calculating the load rate to reflect the network busy degree. Vector coding is used to generate initial particle swarm, each particle represents a data acquisition path, the transmission efficiency and communication quality of the path are evaluated, and the path score is obtained by weighted fusion based on the load rate. The particle with the highest score is selected as the global optimal solution to guide the particle swarm learning, the learning ratio is adjusted through the negative exponential function, the parent node vector is updated and iteratively optimized until the score no longer improves, the optimal path is output, and the data acquisition path optimization is completed. The present application dynamically adjusts the weight and optimization strategy, adapts to network changes, reduces the hop count, avoids weak signal links, and improves the transmission efficiency and stability of the data acquisition path.

This application discloses a flexible power distribution network AC / DC hybrid control device and method empowered by quantum precision measurement. The device includes an AC / DC hybrid quantum interference measurement module, a quantum measurement control closed-loop linkage module, an adaptive quantum entanglement anti-interference shielding module, and a quantum classical collaborative backup control module. The method includes the following steps: S1, synchronously and precisely measuring the real-time magnetic field signals on the AC and DC sides of the AC / DC hybrid system; S2, amplifying the weak signals in the real-time magnetic field signals; S3, actively canceling external electromagnetic interference through the adaptive quantum entanglement anti-interference shielding module; S4, using the real-time magnetic field signals to solve the optimal power balance solution through the QUBO objective function and variational parameter optimization formula, and monitoring the state of the AC / DC hybrid system in real time, in order to solve the problems of large control delay, weak anti-interference capability, disconnect between measurement and control, and inability to adapt to dynamic topology changes in existing technologies.

The present application belongs to the technical field of medical ultrasonic signal processing, and specifically relates to a spermatic vein ultrasonic imaging enhancement system and method based on double-wall filtering and adaptive Doppler signal processing. The system comprises a dynamic reconfigurable analog front end, a dual-channel heterogeneous data processing unit and a closed-loop feedback controller. The method extracts fluid dynamics characteristics in real time through an auxiliary path, intelligently identifies resting state and action mutation state. At the action mutation moment, the physical layer automatically switches the analog filtering parameters to prevent signal saturation, and the digital layer adaptively increases the FIR filter weight to eliminate the ringing artifact; in the resting state, the high-gain analog configuration is maintained and the IIR filter is dominated to capture weak signals. With the delay buffer mechanism, accurate timing alignment of control instructions and imaging data is realized. The present application effectively solves the contradiction between low flow rate detection sensitivity and strong tissue motion interference suppression, eliminates the flicker artifact generated by breath holding action, and significantly improves the diagnosis accuracy of weak reflux.

This invention provides a method and system for enhancing signal capabilities. The method includes: collecting antenna mutual coupling data of an antenna array according to the current operating frequency band; determining an adjustment mode for adjusting the antenna mutual coupling data based on the collected antenna mutual coupling data and current communication performance characteristic data; and adjusting the antenna array coupling units according to the adjustment mode to adjust the antenna mutual coupling data. This invention solves the problem in related technologies of maintaining excellent transmit and receive communication performance of terminals in various weak signal and extreme scenarios, both indoors and outdoors, thereby improving the transmit and receive communication performance of the terminal.

The application discloses a kind of based on piezoelectric film air flow detection circuit, air flow detection device and electronic atomizer, by adopting piezoelectric film as sensing element, combining integral circuit design, transient electrical signal is converted into stable detection voltage output, so that the deformation size of piezoelectric film can be accurately judged, and then the function of accurately detecting air flow is realized.The problems of weak anti-interference ability, poor signal stability and other problems existing in traditional air flow detection technology can be effectively solved.

This invention discloses a ferroptosis target identification system and method based on an attention mechanism, belonging to the field of artificial intelligence technology. The system includes modules for extracting multi-source features of ferroptosis regulation, labeling weak signal targets, calculating attention potential energy mapping, and ranking ferroptosis targets. It extracts multimodal features from transcriptome expression, molecular interaction networks, and ferroptosis pathway annotations. Targets with expression intensities below a preset threshold that participate in the ferroptosis pathway are labeled with weak signals. Weak signal characteristics are injected, and a potential energy bias is constructed to complete attention potential energy mapping. Then, through pathway mapping and cross-pathway linkage identification and fusion weights, the target linkage degree is calculated and ranked. This system solves the problem of traditional methods easily neglecting weak signal targets, and can identify targets with insignificant expression changes in the ferroptosis regulatory network. Through attention and pathway-level linkage modeling, the comprehensiveness of target identification is improved, and the obtained ranking results have stability and discriminative power, making it suitable for the identification and research of ferroptosis-related targets.

This invention provides a curvewave domain-based method for removing strong axes based on reflection coefficient attribute volumes, relating to the field of seismic data processing technology. The method includes: performing spectral inversion processing on raw seismic data to generate a reflection coefficient volume; based on the reflection coefficient volume, performing multi-scale, multi-directional layer-by-layer analysis in the curvewave domain, i.e., extracting reflection coefficient curves for each analysis window, determining inflection point locations by calculating the zero point of the second derivative of the curves to identify abrupt changes in the reflection coefficient; simultaneously, constructing local discrete surfaces based on the reflection coefficient volume, identifying local geometric anomaly regions of the reflection coefficient volume by fitting surface patches and calculating Gaussian curvature; and extracting strong reflection coefficient components by combining the determined inflection point locations and the identified local geometric anomaly regions. This invention can achieve precise stripping of strong reflection energy and faithful protection of effective weak signals, improving the reliability of seismic data in identifying and analyzing subsurface lithology and geological structures.

This invention discloses a thin-layer weak signal enhancement method based on cyclic spectrum enhancement technology. The method first preprocesses the original seismic data using a Gaussian smoothing operator to suppress random noise while preserving the main signal features. Then, even-order derivative operations are introduced to enhance the high-frequency components and detailed information of the seismic signal, highlighting the reflection characteristics of the thin-layer interface. To address the issue of high-order derivatives easily introducing high-frequency noise, a Butterworth low-pass filter is used for directional noise reduction. Finally, an adaptive cyclic termination condition is used to determine the optimal derivative order, and the derivative seismic traces are superimposed onto the original seismic traces to achieve thin-layer weak signal enhancement. Numerical simulations and tests with actual seismic data show that this method can effectively enhance the weak signals of 10m (λ / 4) and 5m (λ / 8) thin layers, improve the continuity and clarity of the phase axis of thin-layer reflected waves, and thus enhance the identification capability of thin-layer reservoirs under complex geological conditions.

The application discloses a wireless weak signal optimization method based on multi-task learning, first, a wireless weak signal optimization model based on multi-task learning is constructed, second, a data set for model training is established, and finally, the model is trained and used for actual test.The wireless weak signal optimization method based on multi-task learning disclosed by the application effectively supports the reliability of the wireless communication system in a complex electromagnetic environment and expands the application scenario of the wireless communication.

This invention relates to the field of seismic data processing technology, specifically disclosing a method for removing strong reflection shielding in hidden river channels based on adaptive hybrid L0-L1 norm. The method includes: first, establishing an optimization objective function based on Bayes' theorem using hybrid L0-L1 norm; second, dynamically adjusting the L0-L1 norm weights using an adaptive weight function driven by the seismic signal, combined with reflection coefficient amplitude and residual information, enhancing sparsity constraints in strong reflection zones and reducing constraint strength in weak reflection zones; then, constructing a convex upper bound for the objective function using a minimization framework, and solving it iteratively in stages using an accelerated rapid iterative threshold shrinkage algorithm, while incorporating prior knowledge of seismic wave propagation laws and river channel deposition patterns to ensure the geological rationality of the solution. This invention solves the technical problems of traditional sparse processing methods, such as fixed parameters, lack of geological constraints, and inability to simultaneously address strong reflection suppression and weak signal protection, significantly improving the separation accuracy of strong reflections and the recovery rate of weak signals, effectively overcoming the strong reflection shielding effect.

The application discloses a novel digital satellite receiver, and relates to the technical field of signal processing, which guarantees the safe and accurate input of satellite radio frequency signals through a signal preprocessing module, and then through the mutual cooperation of a first switch module and a second switch module, switching between a first signal processing module and a second signal processing module can be realized, which not only has fine tunable filtering capability, is particularly suitable for receiving weak signals or in complex environments with strong interference, can effectively improve the receiving sensitivity and anti-interference capability, but also has fine tunable filtering capability, is particularly suitable for receiving weak signals or in complex environments with strong interference, can effectively improve the receiving sensitivity and anti-interference capability, and the double-path design enables the receiver to intelligently switch the working mode according to the real-time signal condition, greatly widens the application scene and adaptability, and finally realizes the digital sampling of signals through a signal amplification module and a signal digitization module.

The present application relates to the technical field of malware detection, in particular to a malicious code detection method based on behavior analysis, comprising the following steps: monitoring system event flow and process resource occupation data, using fixed time interval sampling to capture network packet arrival time interval, CPU occupation rate fluctuation, target file lock contention state and mouse cursor pixel position, calculating mutual information entropy between different event flows, and revealing hidden associations that cannot be perceived by traditional detection methods. This method is no longer limited to analyzing the isolated behavior of a single process, but captures the weak signals generated when malicious software uses hidden channels for communication or data leakage by quantifying the statistical dependence between seemingly unrelated events.

The application provides a metal film thickness measurement method and device for tungsten gate chemical mechanical polishing, comprising a sensor probe, a power module, a signal excitation module, a differential amplification module, a synchronous demodulation module, a data acquisition and processing module; the sensor probe comprises coaxially arranged excitation coils, detection coils and balance coils; the signal excitation module drives the three-coil resonance module to induce eddy current effect at the metal film to be measured; the differential amplification module converts the equivalent impedance change caused by the eddy current effect in the coils into a differential signal, and simultaneously improves the dynamic range through low-noise amplification; subsequently, the synchronous demodulation module multiplies the differential signal with a reference signal, and extracts a direct current component proportional to the signal amplitude through a low-pass filter; the obtained voltage amplitude signal is input into the data acquisition and processing module; the application can significantly amplify the weak signal related to the film thickness, effectively suppress common-mode noise, obtain nanometer-level thickness resolution, and has a high signal-to-noise ratio.

A method and device for parallel phase-locked loop (PLL) amplification of weak signals using FPGA multi-channel parallel processing is disclosed, relating to the field of digital signal processing technology. This method aims to improve the parallel processing capability of FPGA processing devices in extracting useful signals from strong noise backgrounds with limited hardware costs. In this method, the FPGA processing device generates a shared phase reference for all channels by employing a globally unified sampling counter and modulo-N addressing, and distributes it using a broadcast bus. This saves the significant logic resources consumed by traditional schemes that require independent configuration of phase accumulators for each channel. Furthermore, by utilizing a general-purpose logic array to implement integer multiplication instead of relying on a limited number of dedicated DSP hard cores, the parallel processing capability of the FPGA processing device in extracting useful signals from strong noise backgrounds is improved with limited hardware costs.

The application discloses a plane grating full-parameter testing system and a measuring method. The system comprises a light source system, a double-layer rotating motion system, a phase-locked system, a monitoring system and a measurement and control system. The light source system comprises an adjustable monochromatic light source module and a frequency-stabilized narrow-line-width laser module. The adjustable monochromatic light source is used for diffraction efficiency measurement, and the frequency-stabilized narrow-line-width laser is used for stray light and period measurement. The double-layer rotating motion system is used for separately controlling a to-be-measured grating and a detector, and is used for angle and translation adjustment. The phase-locked system is used for weak signal measurement. The monitoring system is used for accurately positioning a grating rotation angle. The measurement and control system is used for completing light source control, motion control, signal acquisition, parameter calculation and result output. The application can realize integrated measurement of plane grating diffraction efficiency, stray light and period parameters.

This invention discloses a method and system for adaptive cancellation of strong and weak signals based on complex structures. The method includes: using a complex RLS adaptive filtering algorithm to track and filter strong interference signals in a complex observation signal to obtain a filtered output signal; during filtering, applying a new filter coefficient vector obtained iteratively from the current complex observation signal to the input complex observation signal after a delay of N periods, thereby decoupling the filter coefficient update from the signal filtering in time, allowing the filtering and filter coefficient update processes to be executed asynchronously; subtracting the filtered output signal from the desired signal to achieve adaptive cancellation of strong signals; and extracting weak signal features from the cancelled signal. This invention fully utilizes the complete information of complex signals in amplitude and phase, overcoming the limitations of traditional real-number processing methods in separating overlapping spectrum signals. It is particularly suitable for complex scenarios where strong and weak signals have similar spectra and large power differences, and has the advantages of high precision, low distortion, and strong real-time performance.

The present application relates to the field of spectral analysis, and relates to an absorption spectrometer and a direct measurement method of absorption light intensity. The present application provides an absorption spectrometer which can directly measure absorption light intensity. The absorption spectrometer comprises a light source assembly, a sample cell, a semi-transparent mirror and a light detector. The absorption spectrometer also provides a direct measurement method of absorption light intensity. In the front light path of two coherent lights, a same sample cell is placed in each light path. The optical path of one light is adjusted until the output of the light detector included in the absorption spectrometer is minimum. Then, a sample to be measured is added to one sample cell, and a blank solution is added to the other sample cell. At this time, the light detector measures the intensity of the remaining light which is not completely cancelled after the convergence of the two lights, i.e. the intensity of the light absorbed by the sample to be measured, i.e. the absorption light intensity. The absorption spectrometer provided by the present application detects absorption light intensity, while the traditional absorption spectrometer detects absorbance. Changing the detection of absorbance to the detection of absorption light intensity can avoid the quantum noise of a large signal from drowning out a weak signal, thereby greatly improving the detection sensitivity of the absorption spectrometer.

The application provides a kind of power conductor breakage fault detection equipment and use method, it is related to technical field, through the distributed high-precision acquisition of multimodal sensing module and anti-strong electromagnetic interference, anti-vibration design, combine environmental noise modeling module to utilize machine learning to construct dynamic environmental noise model and generate background interference intensity factor, effectively filter out complex environmental noise, significantly reduce false alarm rate, improve real breakage signal capture ability;The risk assessment unit of system adaptive optimization module associates fault confidence index with background interference intensity factor, fits breakage risk assessment index, realizes adaptive detection sensitivity adjustment based on real-time environmental noise;Strategy optimization unit carries out multistage risk assessment and grading disposal through evaluation threshold interval, shortens fault response time, improves the capture and early warning efficiency of non-completeness or initial weak signal, effectively guarantees the safety of railway power supply system.

This utility model discloses a handheld portable lightning warning device, including a circuit board, a shell, a cover plate, a 4G antenna and a Beidou antenna, a signal receiving circuit, an alarm circuit, and a main control circuit. The main control circuit is connected to the 4G antenna, the Beidou antenna, the signal receiving circuit, and the alarm circuit. This utility model achieves positioning and tracking through the 4G antenna and the Beidou antenna, making it easier for users to identify directions in the wild or in areas with weak signals, thereby ensuring user safety. Furthermore, the signal receiving circuit, the main control circuit, and the alarm circuit sense early low-intensity weak discharges and noise changes of lightning within a range of 5-15 kilometers, providing timely audible and visual warnings of nearby or impending lightning discharges to remind users to take shelter from lightning and protect their safety.

A handheld magnetometer and a magnetic field fusion correction method integrating software correction and temperature monitoring, which is composed of a probe module, an excitation conditioning module and a data acquisition module, the probe module is connected with the excitation conditioning module through electrical signals; the excitation conditioning module is connected with the data acquisition module through electrical signals; the probe module converts invisible magnetic signals into measurable electrical signals and outputs them to the excitation conditioning module; the excitation conditioning module detects, extracts and amplifies the weak signals output by the probe module and outputs them to the data acquisition module; the data acquisition module interacts with external devices after AD conversion. Through high integration, many problems that need to be solved by users are perfectly solved in the sensor, and stable, reliable and easy-to-use digital data is directly output.

This invention provides a method and apparatus for recovering weak signals lost during the denoising process, solving the problem of signal damage caused during denoising. The method for recovering weak signals lost during denoising includes: acquiring an original record and a denoised record; obtaining a noisy record based on the original record and the denoised record; performing pre-stack offset processing on the denoised record and the noisy record respectively; extracting the effective signal from the noise offset profile in the noise record offset profile; fusing the effective signal from the denoised record offset profile and the effective signal from the noise offset profile; and performing a back-addition processing on the fused effective signal.

This invention discloses a method for optimizing positioning trajectory data loss in low power mode, which is applied to a mobile terminal with single Beidou positioning function. The method includes the following steps: (1) Hardware configuration: The main control module controls the power supply of the Beidou chip and interacts with the Beidou chip through the serial port; the antenna module is configured, the antenna material selection and placement are optimized, a backup power supply is configured for the Beidou module, and the low noise amplification factor of the antenna LAN is increased. This method for optimizing positioning trajectory data loss in low power mode ensures stable power supply of the Beidou chip and sensitive antenna signal reception by optimizing antenna selection and placement, configuring backup power supply, and increasing low noise amplification factor. It reduces positioning failure and data loss caused by weak signal and power interruption, and lays the hardware foundation for continuous trajectory recording.

This invention discloses an automatic testing method, system, device, and product for the current linewidth of a narrow-linewidth laser. The invention acquires frequency noise spectrum data of the laser at different injection currents using a current scanning method with a preset step size, and calculates the linewidth of the laser at different injection currents based on this data. Finally, based on the integrated linewidth at different injection currents and using an automatic inflection point identification algorithm, the evolution characteristics of the laser's frequency noise spectrum under different injection currents are analyzed, thereby determining the integrated linewidth of the laser at its optimal operating current. Therefore, this invention provides a new linewidth measurement technology. Compared to traditional delay heterodyne methods and improved zero-beat schemes, it eliminates the need for long / short laser delays, thus avoiding the environmental noise introduced by long fiber delays and the problem of weak signals being submerged by system noise due to short fiber delays, thereby improving measurement accuracy.

The application discloses a satellite signal lock loss relocation method, system, device and storage medium, the method comprises the following steps: taking the carrier NCO value and code NCO value before lock loss as the center, a two-dimensional search range is constructed; searching in the two-dimensional search range, calculating the non-coherent accumulation value of each grid point, and finding the maximum non-coherent accumulation value; according to the size of the maximum non-coherent accumulation value, judging the peak interval to which the maximum non-coherent accumulation value belongs; when the maximum non-coherent accumulation value belongs to the first peak interval, a traditional frequency-locked loop reentry locking mode is adopted; when the maximum non-coherent accumulation value belongs to the second peak interval, a high-sensitivity reentry locking mode is adopted. The application improves the lock loss relocation sensitivity under weak signals, effectively guarantees the availability of the receiver under weak signals, and solves the problem of lock loss relocation under weak signals.