203 results about "Composite signal" patented technology

The invention particularly relates to a leakage current testing method, device and system for an intelligent circuit breaker, and relates to the technical field of electrical safety detection. A composite signal generation and injection module; a broadband signal acquisition and conditioning module; and a line fault positioning and impedance analysis module. According to the invention, the composite signal generation module realizes the non-interference isolation injection of a leakage current signal and a high-frequency positioning signal, and guarantees the high fidelity of data through adaptive filtering, multi-channel synchronous sampling and high-precision timing. The line positioning module integrates TDR and a frequency domain impedance method, and through multi-frequency point deviation correction and topology-GIS association, the fault type is accurately identified, and the test and troubleshooting period is significantly shortened.

The invention relates to a communication method. The communication method may comprise determining a composite signal, the composite signal representing a sum of symbols associated with frequency-time resources and of a pilot representative of at least one pulse in a delay-Doppler domain, wherein the symbols associated with frequency-time resources comprise at least data symbols and transmitting the composite signal through a radio channel.

A four wire-to-two wire lamp control method includes: inputting R, G and B lamp control signals are to corresponding oscillators which are controlled to generate R, G and B oscillation signals; the three oscillation signals being amplified and then coupled into a composite signal which is superposed onto integrated electric power to obtain composite electric power that is transmitted by a two-wire system transmission module. In this way, transformation from a four-wire lamp system to a two-wire lamp system is realized. The composite signal and power are synchronously transmitted in the two-wire system, such that the system can approximately synchronously transmit the composite signal at a low delay, and the integrated electric power can still be transmitted continuously in case of a low duty cycle of the lamp control signals, thus satisfying the requirement for driving power of a lamp.

The invention relates to the technical field of on-line monitoring, in particular to an insulation fault on-line monitoring method and system for a medical IT system control cabinet. The method comprises the following steps: selecting a non-integer frequency multiplication detection frequency according to equivalent ground distributed capacitance in a previous monitoring period, and superposing the non-integer frequency multiplication detection frequency with a fundamental frequency to form a composite signal injection system; collecting signals to calculate a voltage instantaneous harmonic distortion rate change gradient, and selecting a time window to split the leakage current according to the change gradient; on the basis of dispersion estimation signal-to-noise ratio weighted fusion current vectors, insulation resistance and distributed capacitance are calculated; constructing a four-dimensional original feature vector composed of the insulation parameter, the phase difference and the intermodulation component energy; constructing a diagonal weighting matrix based on the resistance-capacitance ratio and the gradient to transform a feature vector, and determining the fault attribution through the Mahalanobis distance calculation with the fault template library. According to the scheme, harmonic interference can be avoided, calculation stability can be improved, insulation instantaneous sudden change can be quickly responded, and different fault types can be accurately distinguished to guide maintenance.

The invention provides a data-driven saline screw compressor unit dynamic modeling method, and belongs to the technical field of industrial intelligence and predictive maintenance. According to the method, adaptive deep denoising of original data is realized through a composite signal processing flow of fusing variational mode decomposition, permutation entropy criterion and wavelet packet transformation optimal threshold denoising; meanwhile, a sectional sampling strategy is introduced to enhance the diversity of training data. Then, a wavelet multi-scale energy entropy extraction layer is used for constructing a high-information-density feature vector; furthermore, a prediction model formed by multiple layers of stacked long and short-term memory network units is adopted, and the complex time sequence dependency relationship of the system is deeply captured. According to the method, pure and stable system dynamic representation can be extracted from high-noise industrial data, the dynamic characteristics of the system in the full working condition range are accurately described, and it is ensured that the prediction result is self-consistent physically and reliable in engineering, so that the prediction precision and generalization performance of the model are remarkably improved.

A Global Navigation Satellite System (GNSS) receiver receives band-limited composite signals corresponding to respective satellites in the GNSS. The composite signal is composed of a direct path signal and a multipath signal. For chip edge hopping of a pseudo-random code, the receiver obtains correlation samples (I (t) samples and Q (t) samples) of the composite signal and compares them with predetermined filter characteristics (SR (t) samples) corresponding to a filter for band-limiting the composite signal. Based on the comparison, the receiver determines a phase and / or a response time error of the chip edge hopping due to the multipath signal. The receiver adjusts a pseudo-range measurement for the respective satellite and / or adjusts a carrier phase measurement for the respective satellite in accordance with the determined and / or adjusted pseudo-range measurement for the respective satellite. The receiver performs a navigation function using the adjusted pseudo-range and / or carrier phase measurements for the respective satellites.

The invention discloses a power equipment multi-band signal comprehensive detection method, which comprises the following steps: deploying a multi-band sensor, and synchronously coupling and collecting an original composite signal; distributing a unified clock signal to each monitoring point based on an optical fiber synchronous network, and controlling an acquisition channel to synchronously acquire an original composite signal; preprocessing and performing frequency band separation on the original composite signal, and outputting a plurality of sub-frequency bands; and extracting signal features from the sub-bands, outputting a multi-dimensional feature vector to a pre-trained deep learning diagnosis model, outputting a combined diagnosis result, and calculating spatial position coordinates of the discharge source. Electrician frequency, overvoltage and partial discharge signals are integrally acquired through the multi-frequency-band sensor, high-precision time alignment acquisition of multi-parameter signals is realized in combination with a subnanosecond optical fiber synchronization technology, intelligent analysis is performed by adopting a double-branch deep neural network for parallel processing of time domain and frequency domain characteristics, and the accuracy and the reliability of the system are improved. And the combined diagnosis precision and the early warning capability of complex insulation defects and overvoltage events are obviously improved.

The invention discloses a non-intrusive sensor with an external excitation source and a voltage measurement method, and the non-intrusive sensor comprises an induction signal collection unit, an induction signal conditioning unit, and a main control unit. The main control unit is respectively connected with the induction signal conditioning unit and the cable power supply, the induction signal conditioning unit is connected with the induction signal acquisition unit, and the induction signal acquisition unit is in non-contact inductive coupling connection with a cable to be detected; the main control unit is used for injecting the specific excitation signal into an alternating current loop of a cable power supply to form a composite signal, analyzing the composite signal based on a preset excitation source amplitude parameter, and calculating the power supply voltage of the to-be-detected cable; the induction signal acquisition unit generates a corresponding induction signal by capturing electric field energy generated by a composite signal in the to-be-detected cable; the induction signal conditioning unit carries out standardization processing on the induction signal. According to the invention, the technical problems of low external excitation voltage measurement precision, low system integration and single excitation source generation mode in the prior art are solved.

The invention relates to a communication method, comprising: determining a composite signal, the composite signal representing a sum of symbols associated with frequency-time resources and of a pilot representative of at least one pulse in a delay-Doppler domain; wherein the symbols associated with frequency-time resources comprise at least data symbols and transmitting the composite signal through a radio channel.

This application relates to the field of unmanned aerial vehicle (UAV) communication technology, and discloses a UAV communication method and a UAV based on low-Earth orbit (LEO) satellite communication. The method includes: establishing a communication subnet to share satellite measurement information, comprehensively evaluating multiple indicators with weights, and selecting the optimal primary serving satellite; calculating phase compensation based on a virtual phase center to achieve in-phase signal superposition, employing multi-user MIMO technology to transmit composite signals, and combining a cooperative interference cancellation algorithm to separate target data; when satellite visibility is predicted to be unavailable, forwarding unacknowledged data packets through newly connected satellite nodes or the node with the longest visibility time within the subnet to avoid data loss due to handover; discretizing spectrum units and randomly testing and evaluating their quality, marking high-quality spectrum units, and then dynamically adjusting the operating frequency band using a probabilistic migration method. This invention can effectively solve problems such as link instability, low spectrum utilization, and communication interruption caused by high dynamism in LEO satellite scenarios.

The invention provides an electrochemical impedance spectroscopy measurement method for an energy storage battery, which comprises the following steps: step 1, respectively optimizing M frequencies fi excited by current into optimally corrected frequencies which are multiples of an optimal fundamental frequency; 2, the amplitude Ai corresponding to the frequency fi is optimized to be Ai ', so that the response voltage signal amplitudes of the energy storage battery to be measured under different frequencies fi are all V; step 3, sampling the current excitation in the step 1A to obtain a discrete multi-sine composite signal sequence, and then performing phase iterative optimization on the current excitation in the step 1A based on the multi-sine composite signal sequence and Ai; step 4, applying the optimized current excitation to the energy storage battery to be tested to obtain a response voltage signal and a current signal of the battery end; and step 5, calculating the complex impedance of the battery under different frequencies fMi, and finally obtaining the complete impedance spectrum of the energy storage battery to be measured in the selected frequency range. The method is high in measurement speed and high in measurement precision.

The invention provides an inclined shaft gas-liquid slug flow ultrasonic flow velocity monitoring and calculating method and system, and the system comprises an ultrasonic flow velocity monitoring probe array module, a signal collection and preprocessing module, and a data processing and calculating module. The method comprises the following steps: performing variational mode decomposition on a signal, separating characteristic components of different flow structures in slug flow, realizing real-time discrimination of a liquid slug and a liquid film section and accurate capture of liquid phase apparent velocity, and accurately calculating gas phase apparent velocity through a unified mechanism model. Through the multi-angle same-direction array design, the measurement deviation caused by non-uniform cross section flow velocity distribution of the inclined shaft is overcome; the composite signal in the slug flow is effectively separated through variational mode decomposition, and the frequency shift extraction precision is improved; the innovative real-time flow state discrimination method based on the signal-to-noise ratio realizes the self-adaption of the measurement model to the flow structure, and significantly improves the measurement accuracy under the complex intermittent flow.

A system includes a power tool including a battery pack interface and a battery pack configured to connect to the battery pack interface. The battery pack is configured to superimpose a digital signal onto an analog signal to generate a composite signal. The battery pack is configured to transmit the composite signal to the power tool via the battery pack interface. The power tool is configured to separate the composite signal into an analog component and a digital component.

A reception device (120) comprises: a reception unit (121) that receives a first transmission signal (10A) transmitted in a first frequency band from a first transmission device (110) included in a plurality of transmission devices (110), and a second transmission signal (10B) transmitted in a second frequency band at least partially different from the first frequency band from a second transmission device (110) included in the plurality of transmission devices (110); and an output unit (122) that outputs the power of a composite signal (11) of a plurality of transmission signals (10) including the first transmission signal and the second transmission signal.

The invention relates to the technical field of loop detection, and particularly provides a line error account analysis method, system and device and a medium, and the method comprises the steps: configuring a composite signal feature comprising a unique frequency hopping sequence, a pseudo-random code and time slot division planning for each loop after a host is connected with each line loop, and injecting a signal into a power line according to a plan; the slave machine detects a line signal at a point to be detected in a non-contact manner, and analyzes a frequency hopping sequence and pseudo-random code features to form a detection fingerprint; and performing multi-dimensional comparison on the fingerprint and the characteristics configured by the host, and judging the matching relationship between the to-be-detected point and the specific loop. According to the invention, through the design and joint analysis of the time, frequency and code three-dimensional orthogonal signals, the anti-interference capability, the multi-loop identification precision and the weak signal detection reliability are significantly improved.

The invention relates to the technical field of wireless communication, and particularly discloses a zero-handshake transient connection establishment method and system based on an Auracast protocol, and the method comprises the steps: generating a composite signal containing a user space position vector and a one-time authorization token, generating a motion feature tag based on the position change, and activating directional scanning only when an approaching or staying intention is detected; a connection environment quality report is generated through multi-channel detection, and the channel congestion degree, the transmission delay and the signal strength are dynamically evaluated; meanwhile, according to the environment quality, a customized connection scheme is generated, an optimal channel and transmission parameters are automatically selected, and after an audio stream receiving service is established, through continuous monitoring of user position changes, instant disconnection is triggered when a departure intention is detected, and full-process automatic connection life cycle management is formed. The problem that the connection process in the public broadcast audio service field is lack of intelligence is effectively solved, automation of connection initiation is realized, and the connection efficiency and the user experience are remarkably improved.

The invention discloses a signal restoration method, device and system. The method comprises the following steps: receiving a signal processing request; in response to the signal processing request, segmenting the composite signal to obtain a plurality of signal blocks; converting to obtain a plurality of frequency domain signal blocks in a frequency domain; according to the symbol rates corresponding to the multiple signal types, determining signal interception numbers corresponding to the multiple signal types; according to a time sequence corresponding to the plurality of frequency domain signal blocks, sequentially carrying out interception processing on the plurality of frequency domain signal blocks to obtain frequency domain sub-signals respectively corresponding to the plurality of signal types until frequency domain total signals respectively corresponding to the plurality of signal types are obtained; converting to obtain a plurality of time domain total signals; and according to the time domain total signals corresponding to the multiple signal types, target restoration signals corresponding to the multiple signal types are determined. According to the method and the device, the technical problems that signal separation is difficult to accurately carry out and signal restoration accuracy exists due to the fact that signal interception parameters are difficult to flexibly configure in related technologies are solved.

An operation method of a radar signal processing apparatus in a radar system may include: generating pulse signals of a number of any one sampling rate having different phases; transmitting the pulse signals to a target; receiving reflected pulse signals reflected back from the target; generating a composite signal by sampling the reflected pulse signals and combining the sampled reflected pulse signals to match the phases; and extracting target information from the composite signal.

The invention relates to the technical field of data processing, in particular to an on-satellite remote sensing data task-oriented cross attention fusion compression wireless transmission method, which comprises the following steps that: an intelligent agent takes metadata and channel state information as a state space and takes a parameter adjustment strategy of a cross attention mechanism as an action space; the output decision dynamically adjusts the interaction degree of different modal original data stream features, and the adjusted features are compressed to generate a compressed data stream; a compressed data stream is input into a wireless transmission digital twinborn model constructed on a satellite, a carrier sensing multi-channel access protocol is adopted in an actual transmission stage, and the size of a protocol backoff window is dynamically adjusted by the digital twinborn model according to a rehearsal conflict probability and is optimized by combining a channel capacity change trend prediction result. And finally sending the composite signal of the physical layer network coding. According to the invention, through task-oriented data processing, intelligent compression and digital twinborn rehearsal, the spectrum competition conflict of satellite multi-modal data concurrent transmission is solved.

Traditionally, feature extraction and thickness quantification of Pulsed eddy current (PEC) composite signals from multiple concentric pipes in oil and gas wells or similar, have been approached via pre-built frequency domain inversion models that do not utilize in-situ data and are subject to many unknown variables. We apply independent component analysis (ICA) with known applications in other areas including facial feature extraction, in a novel fashion to determine from in-situ data, the original independent PEC signals corresponding to each pipe, from their composite signal, hence allowing the thickness of each pipe to be reliably quantified. Since ICA is unsupervised, no prior modelling with synthetic or out-of-sample data is required, rather in-situ data is utilized. The results are consistent across logging tool manufacturers as prior knowledge of each tool sensor / physics is not required.

Techniques are disclosed for the use of Crest Factor Reduction (CFR) technique that utilizes a cancellation pulse signal having a reduced length. The CFR technique may be applied to a signal to be transmitted, which may comprise a composite signal having one or more carrier signals. Each carrier signal of the composite signal may be filtered via a respective channel filter and then recombined to form the signal to be transmitted, on which the CFR operations are then applied. The length of the cancellation pulse signal is less than the number of taps of the channel filter with the largest number of taps. This reduction in cancellation pulse signal length significantly reduces the processing power required to perform the CFR operations while maintaining regulatory emissions compliance.

The invention discloses a GNSS multipath parameter estimation method based on multi-correlator output, and belongs to the field of satellite signal multipath resistance. The invention discloses a GNSS multipath signal parameter estimation method, and aims to provide a novel GNSS multipath signal parameter estimation method which comprises the following steps: performing correlation operation on a local spreading code and a received signal through a GNSS correlator, and mining internal correlation between a correlator interval and a multipath error based on a correlation output result of a composite signal; the method comprises the following steps: acquiring multipath error data of multiple groups of correlators to construct a relation curve by combining an analytical formula of correlator spacing and multipath errors, reversely deducing multipath parameters by solving coordinates of turning points of the curve, and finally realizing accurate estimation of the multipath parameters. According to the method, the time delay, phase and amplitude parameters of the short multipath can be accurately identified, and the capability bottleneck of a traditional algorithm in the aspects of short multipath suppression and estimation is effectively broken.

The invention relates to an underwater communication and distance measurement method and device. The method is applied to a receiving end of an underwater communication distance measuring device, and comprises the following steps: receiving an optical signal, converting the optical signal into an electric signal, and carrying out analog-digital sampling to obtain a composite signal, the distance measuring signal being a digital signal which is obtained by modulating an analog distance measuring signal and is matched with a transmission rate of a communication signal, separating a communication signal and a ranging signal from the composite signal, recovering the communication signal into original communication data, counting a time interval from transmitting to receiving of the ranging signal, determining a distance estimation value between a transmitting end and a receiving end based on the time interval, determining a phase offset of the ranging signal, and transmitting the ranging signal to the receiving end. And based on the phase offset, determining the distance offset corresponding to the phase change generated by the distance measurement signal in the propagation process, and fusing the distance estimation value and the distance offset to obtain a target distance measurement result. By adopting the method, integrated underwater high-speed communication and high-precision distance measurement can be realized.

A vehicle includes memory and processing circuitry, where the processing circuitry is configured to execute a vehicle hardware abstraction (VHAL) and a vehicle composite signal framework (VCSF). The VCSF manages component signals obtained from a plurality of vehicle services of the vehicle that include components of the vehicle and are representative of functions of the components. The VCSF obtains a component signal from a vehicle service of the plurality of vehicle services and processes the component signal into composite signal. The VCSF processes the component signal based on a mapping of the vehicle services to vehicle properties maintained by the VHAL layer. The VCSF provides the composite signal to an application executed by the processing circuitry.

A selective acoustic electromagnetic transducer (400) for a Lamb wave propagation mode of interest propagating in a structure, comprising a circularly shaped magnet (401) and a coil (402) comprising several independent concentric circular portions and a processing unit (403) connected to the ends of each circular portion, the processing unit (403) being configured to generate a composite signal equal to a linear combination of the signals measured on each circular portion, the coefficients of the linear combination being chosen so as to minimize the sensitivity of the coil (402) to a set of Lamb modes excluding the mode of interest. Figure 4a

The invention discloses a high-spectral-efficiency and high-speed FTN (Fourier Transform Network) transmission method based on pseudo code auxiliary carrier synchronization, which belongs to the field of high-frequency wireless communication, and comprises the following steps: a transmitting end composites a low-speed pseudo code pilot signal into a high-speed FTN signal by adopting a frequency division multiplexing mode to obtain a composite signal and outputs the composite signal; a receiving end performs down-conversion on the received composite signal, and the composite signal is separated by a filter to obtain a low-speed pseudo code pilot frequency sequence and a high-speed FTN sequence; carrying out carrier frequency offset estimation based on the low-speed pseudo code pilot frequency sequence to obtain a frequency offset estimation value; performing frequency offset compensation on a receiving end carrier by adopting the frequency offset estimation value to obtain a compensated high-speed FTN sequence; and carrying out symbol estimation on the compensated high-speed FTN sequence by adopting a forward backtracking continuous symbol sequence detection algorithm to obtain a received signal. According to the invention, the receiving sensitivity and the system robustness can be ensured while high-spectrum-efficiency transmission is realized.

The application provides a multi-signal spectrum separation method, device, equipment and medium, which is used in the technical field of radio monitoring and can solve the technical problem of low spectrum separation accuracy caused by the limitation of channel number and poor adaptability of directional antenna array. The method comprises the following steps: calculating a real-time conjugate transpose signal and a time-delay conjugate transpose signal under multiple different time delays according to a real-time composite signal, and determining a corresponding covariance matrix and multiple pseudo-covariance matrices; determining a matrix product according to the conjugate transpose matrix of an initial demixing matrix, obtaining multiple initial product matrices, and judging whether the initial product matrices are all approximate diagonal matrices; iteratively processing the initial demixing matrix to obtain a target demixing matrix; determining a corresponding array manifold matrix based on the target demixing matrix, and determining the signal amplitude of each signal at the frequency point corresponding to the array manifold matrix and the mixed amplitude and phase vector corresponding to each frequency point; thus, the spectrum separation accuracy is improved.

The invention relates to the technical field of electrical engineering safety monitoring, and particularly discloses a method for evaluating influence of stray current on corrosion of a ground grid, which comprises the following steps of: acquiring discretized global potential data of the ground grid to generate a corrosion risk situation map so as to lock a target detection area; then an excitation injection point is selected, a composite signal containing mechanical vibration waves and direct-current pulse current is injected, an instantaneous low-resistance conduction path is constructed, and current is guided to form path marking current; a feature response waveform in the target detection area is captured, path association is decoded and confirmed, and a path association confirmation voucher is generated; and finally, integrating a plurality of vouchers, and reconstructing and outputting a current corrosion main channel visual map. According to the method, tracking from discrete risk points to continuous corrosion paths is realized, non-intrusive and repeatable global dynamic evaluation capability is provided, the operation and maintenance efficiency is remarkably improved, and the maintenance cost of a power grid is reduced.

This invention discloses a coupling and separation network for composite signal transmission, relating to the field of composite signal transmission. The coupling and separation network includes: a boost module for boosting an AC drive signal; a drive transmission module for transmitting the boosted AC drive signal and outputting it to a parallel resonant module via a cable; and a parallel resonant module for ensuring that the voltage and current on the coaxial cable are in phase. The boost module is connected to the drive transmission module, which in turn is connected to both the parallel resonant module and the boost module. This coupling and separation network drives three types of signals. Compared with existing technologies, the advantages of this invention are: it avoids the problems of relay mechanical reliability and transient interference caused by switching during composite signal transmission, and it utilizes a transducer-matched inductor to achieve high-voltage, high-power, low-frequency signal filtering, avoiding the size and weight costs associated with additional components.