526 results about "Interference immunity" patented technology

The invention relates to the technical field of gas detection, in particular to a multi-gas accurate detection method and system.The method comprises the following steps that gas to be detected flows through a miniature gas enrichment device prepared through an MEMS technology under driving of a miniature gas pump, and target gas is adsorbed and enriched through graphene and metal oxide composite sensitive materials on the surface of a spiral gas inlet flow channel in the miniature gas enrichment device; the desorption concentrated gas is heated to the multi-gas composite detector, and the sensor array reacts with the gas to generate an electric signal; the data acquisition unit performs noise reduction, amplification and analog-to-digital conversion preprocessing on the electric signal; the data processing unit extracts characteristic vectors such as a response curve peak value and a rising slope; inputting the feature vector into a pre-trained machine learning classification-regression combined model, and outputting a gas type identifier and an initial concentration; error compensation is carried out in combination with environment temperature and humidity and a cross sensitivity interference mode library, and finally accurate information of at least nine gases is output. The device has the advantages of high sensitivity, strong anti-interference performance and miniaturization.

The invention discloses a pulse eddy current signal late period slope feature extraction method and system based on segmentation fitting, and belongs to the technical field of nondestructive testing. The method comprises the following steps: performing logarithmic transformation and filtering processing on a to-be-detected eddy current signal; intercepting a characteristic signal segment based on the filtering signal; dividing the feature signal segment into a plurality of sub-segments, performing piecewise linear fitting, determining a linear segment, and extracting a slope as a feature value; repeating the steps to obtain characteristic values of the test pieces with different thicknesses, performing curve fitting according to the characteristic values of the test pieces with different thicknesses and the corresponding thicknesses, and calculating a fitting error; and finally, iteratively optimizing the division number of the sub-segments by taking the minimum fitting error as a target. Through adaptive filtering, segmentation fitting and an intelligent optimization algorithm, the anti-interference performance, the linearity and the measurement precision of pulse eddy current signal feature extraction are remarkably improved, and efficient and reliable thickness detection of the high-temperature and high-pressure industrial pipeline under the condition that a heat preservation layer does not need to be disassembled is achieved.

The invention discloses a digital control uninterruptible power supply parallel operation phase locking method, which relates to the technical field of digital phase locking, and comprises the following steps of: in each analysis period, acquiring an output voltage waveform signal and a current frequency disturbance control parameter of each uninterruptible power supply, and respectively executing short-time Fourier transform to obtain an output voltage waveform signal and a current frequency disturbance control parameter of each uninterruptible power supply; and converting the time domain signal into a multi-dimensional dynamic spectrum matrix, extracting frequency and amplitude parameters of a disturbance signal, and constructing a corresponding uninterruptible power supply disturbance parameter set. According to the invention, through dynamic spectrum analysis and frequency domain coupling tensor modeling, accurate extraction of UPS modulation signal features and dynamic evaluation of resonance risk indexes are realized, in combination with a risk-driven frequency intervention mechanism, frequency coupling is broken, the frequency diversity and disturbance decoupling capability of the system are improved, and the reliability of the system is improved. The stability, the anti-interference performance and the intelligent response capability of the parallel system are obviously enhanced, and early warning and active suppression of lock point resonance are realized.

The invention relates to the field of nonlinear system control, and provides a preset time reinforcement learning method and system of a continuous nonlinear system, and an electronic device, and the method comprises the steps: constructing a zero-sum game framework based on a kinetic model and a performance index of the nonlinear system; determining a value function and a Hamiltonian function based on a zero-sum game framework; applying a preset neural network model to carry out approximation on the value function, and determining an approximation error; based on the Hamiltonian function and the approximation error, an approximate optimal control strategy and a worst interference strategy are determined; constructing a Lyapunov function based on the value function and the weight error of the value function; and based on a Lyapunov function, an approximate optimal control strategy and a worst interference strategy, a reinforcement learning result is verified. The method and the device are used for overcoming the defects that convergence time cannot be dynamically adjusted, parameter complexity is high and robustness is insufficient in the prior art, and the scheme of the invention can meet dual requirements of a continuous nonlinear system on dynamic convergence and anti-interference performance.

The invention discloses a new energy broadband test analysis management and control method and system, and relates to the technical field of new energy detection and intelligent management and control, and the method comprises the following steps: obtaining a multi-window splicing frequency spectrum of a load switching edge, superposing phase lock consistency verification in a splicing frequency spectrum result, generating a frequency spectrum leakage suspicion chart, and carrying out the boundary constraint for energy track extraction; under the constraint of a spectrum leakage suspicion chart, an energy center track, a group delay curve and a phase derivative sequence are extracted, and a cross-frequency migration fingerprint is constructed and is used as a basic evidence for misjudgment traceability. By means of spectrum suspicion identification, feature fusion modeling, misjudgment traceability, label correction, energy reverse intervention and the like, accurate identification and closed-loop regulation and control of false operation caused by spectrum leakage are achieved, high identification accuracy, low misjudgment rate, high anti-interference performance and quick response capacity are achieved, and the operation stability and safety of a new energy field station are remarkably improved.

The invention relates to the technical field of electric field measurement, in particular to a non-contact electric field sensor design method and system, and the method comprises the steps: carrying out the electromagnetic analysis and shielding structure topological optimization based on the environment characteristics of a transformer substation, and generating mechanical design parameters; shielding structure parameters are formed through material selection and electrode optimization, a three-dimensional electromagnetic field simulation model is established, and multi-scene interference simulation and sensitivity verification are carried out; and configuring a temperature compensation circuit and optimizing circuit parameters, performing dynamic response analysis and material matching degree evaluation through a high-frequency material test platform, and finally generating sensor specification parameters. According to the method, the anti-interference performance, the measurement precision and the stability of the sensor are remarkably improved, and the method is suitable for high-precision electric field measurement in a complex electromagnetic environment.

The invention discloses an encrypted communication system and method based on cognitive multi-carrier spread spectrum, and belongs to the field of covert communication. The encryption communication system comprises a transmitting device and a receiving device. The transmitting device comprises a data encryption module, a constellation encryption modulation module, a multi-carrier spread spectrum module, a frequency hopping module and a cognitive power distribution module. The receiving device comprises a band-pass filtering module, a de-hopping frequency module, a de-spreading module, a constellation decryption demodulation module, a data decryption module and a coherent combination module. The data encryption module is divided into an interleaving coding unit and a double-rule reversible cellular automaton encryption unit. The cognitive power distribution module continuously scans a wireless electromagnetic environment and carries out real-time spectrum analysis to give power spectrum density results sensed under all frequency hopping frequency sets. According to the invention, continuous detection and dynamic response to the spatial frequency spectrum state can be realized, and the communication concealment, the anti-interference performance and the resource utilization efficiency in a complex electromagnetic environment are remarkably improved by utilizing the frequency spectrum hole.

The invention discloses a heterogeneous network converged communication control method and system for a vehicle-mounted terminal, and relates to the related technical field of communication control, and the method comprises the steps: determining a plurality of original signal fragments transmitted to a receiving end by a plurality of heterogeneous networks based on the vehicle-mounted terminal; a vehicle-mounted terminal is provided with an intermediate fusion node, and the intermediate fusion node is provided with an interference detection module and a differential processing module; carrying out adaptive signal differential coding processing according to a synchronous receiving constraint condition of a receiving end and the plurality of link interference detection signals, and outputting a plurality of differential signal fragments; and respectively sending to a receiving end for signal restoration. The technical problem that in the prior art, when a vehicle-mounted heterogeneous network sends the same or fragmented signals at the same time, due to dynamic variation of network link interference and transmission delay difference of all paths, signals at a receiving end are out of step and quality is deteriorated is solved. The technical effects that the receiving end efficiently and synchronously restores the signal, and the anti-interference performance of signal transmission and the reliability of heterogeneous network converged communication are improved are achieved.

The invention relates to the technical field of concrete detection, in particular to a concrete protective layer void detection method and system based on a detachable piezoelectric ceramic sensor and an electromechanical impedance resonance technology. The detection method comprises the following steps: temporarily fixing a detachable piezoelectric ceramic sensor on a detection point on the surface of a concrete structure; applying an alternating-current sweep-frequency voltage to excite the piezoelectric ceramic sensor, and obtaining an electromechanical impedance signal frequency spectrum; the electromechanical impedance signal frequency spectrum is analyzed, the frequency of a local defect formant is obtained, and according to the frequency of the local defect formant, geometric parameters of a void area are estimated through a defect size and frequency relation model; and moving the sensor and repeatedly detecting other detection points. The detection method has high efficiency and flexibility, and detection can be realized in any environment; the single-point detection speed is high, the efficiency is high, baseline data is not needed for detection, the anti-interference performance is high, and rapid positioning and quantitative evaluation of void damage can be achieved.

The invention relates to the technical field of communication anti-interference detection, in particular to a communication anti-interference simulation detection method for a flywheel energy storage system, and the method comprises the following steps: obtaining torque data to generate disturbance characteristics, comparing interference levels, injecting electromagnetic signals, monitoring error code statistics delay errors, and analyzing communication levels to generate a link anti-interference simulation detection result. According to the method, disturbance characteristics are constructed by extracting torque sudden change points, interference frequency band injection is guided, causal linkage of disturbance response and electromagnetic interference is formed, and pertinence and effectiveness of interference injection are enhanced; identifying a bit error rate fluctuation trend and a delay peak value through a sliding window, and realizing dynamic description of a communication quality degradation process; a synchronization error is calculated in combination with an interference spectrum and an error code time point, and the capability of monitoring the consistency change of link time is improved; grade mapping is carried out on the basis of multi-dimensional indexes, the anti-interference performance is converted from static testing to dynamic evaluation, and the testing granularity, adaptability and accuracy are improved.

The invention discloses an anti-electromagnetic interference power distribution cabinet shielding method, which optimizes sensor layout through partition topology information and electromagnetic environment parameters, automatically collects and marks multi-partition frequency spectrum original signals, implements normalization, filtering and abnormal point cleaning, combines artificial intelligence classification, and improves the anti-electromagnetic interference performance of a power distribution cabinet. According to the method, characteristic parameters such as dominant interference frequency, amplitude change and interference types are extracted, grounding strategy judgment and physical switching are driven, real-time feedback closed-loop verification and compensation factor self-adaptive optimization are combined, and finally the anti-interference performance of the power distribution cabinet system is dynamically improved. According to the method, partitioned electromagnetic environment perception, grounding strategy flexible adjustment and data management capability are effectively enhanced, the method is suitable for a complex power distribution scene, and the operation reliability and the anti-interference capability are improved.

The invention provides an online monitoring method for mechanical characteristics of a high-voltage circuit breaker. The online monitoring method comprises the following steps: mounting a plurality of piezoelectric ultrasonic sensors on the surface of a key mechanical part of the high-voltage circuit breaker; when the high-voltage circuit breaker executes opening or closing operation, ultrasonic original signals generated by the ultrasonic sensors are synchronously collected; filtering and de-noising the collected original signal, and extracting an effective ultrasonic signal generated by mechanical vibration; extracting a time domain feature and a frequency domain feature to form a feature vector; and inputting the feature vectors into a pre-generated ultrasonic feature-mechanical feature mapping model, calculating to obtain mechanical feature parameters of the high-voltage circuit breaker, judging whether an abnormal condition exists or not, and generating and outputting graded early warning information if the abnormal condition exists. The invention further discloses a corresponding system. According to the invention, the anti-interference performance of the monitoring process can be improved, multi-parameter synchronous monitoring can be carried out, the operation and maintenance efficiency can be improved, and the operation and maintenance cost can be reduced.

The invention relates to a seabed trapezoidal foldable electromagnetic coil device, which belongs to the technical field of ocean electromagnetic detection and comprises a main bearing beam, an expandable transmitting coil assembly, a receiving coil assembly, a transmission connecting rod, a hinged rotating seat, a sliding connecting seat and a push-pull driving rod. The transmitting coil is of a symmetrically-distributed trapezoidal structure, the receiving coil is in sliding fit with the main bearing beam through the sliding connecting base, the push-pull driving rod is in linkage with the receiving coil to move and the transmitting coil to be unfolded / folded, the device frame is made of a macromolecule non-magnetic material, and the ferromagnetic driving component is arranged in an avoiding mode. Receiving coil plane magnetic field balance is achieved through the non-uniform magnetic field design of the trapezoidal transmitting coil, coil space optimization configuration is completed through a linkage mechanism, folding portability and anti-interference performance of a multi-layer coil are achieved at the same time, direct coupling of a primary field of the transmitting coil to receiving is effectively restrained, the stability and the signal-to-noise ratio of a detection signal are improved, and the detection precision is improved. The method is suitable for complex seabed transient electromagnetic detection scenes carried by AUV / ROV.

The invention provides a sensor calibration communication method based on a sensor power supply line. The method comprises the steps that S1, calibration equipment modulates an instruction signal to be issued to a sensor into a voltage change signal and couples the voltage change signal to the power supply line of the sensor; s2, a sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to demodulate the instruction signal; and S3, after the sensor receives the instruction signal, the instruction signal is processed, and a corresponding instruction reply is transmitted back to the calibration equipment. According to the method, sensor communication is realized based on the power supply line of the sensor, an instruction from a calibration device is modulated into a voltage change signal and coupled to the power supply line of the sensor, and an instruction reply is modulated into a current change signal of a power supply loop, so that the anti-interference performance of the communication method is enhanced, and the cost is reduced. The invention further provides a sensor and a sensor assembly comprising the sensor.

The invention discloses a permanent magnet synchronous motor model-free sliding mode control method based on a novel reaching law, belongs to the field of power electronics, and aims at solving the problems that traditional sliding mode control is large in buffeting and high in steady-state error and depends on an accurate model. According to the method, based on a model-free theory, a permanent magnet synchronous motor rotating speed ring super-local model is constructed, then a novel reaching law containing a dynamic parameter delta = e-x beta is designed, and the contradiction between buffeting suppression and quick response is solved; meanwhile, designing a novel sliding-mode observer, and estimating an unknown part g of the system to realize disturbance feed-forward compensation; and finally, a q-axis current reference value control law is obtained through derivation in combination with a sliding mode surface and a mechanical motion equation. The method can weaken the buffeting of the sliding mode, improves the anti-interference performance and the steady-state precision of the system, guarantees the finite time convergence of the state, and is suitable for the control of the permanent magnet synchronous motor in the fields of aerospace and new energy automobiles.

The invention provides a magnetic field sensor based on an amorphous wire giant magneto-impedance effect, which relates to the technical field of magnetic field testing and comprises a sensitive element module, an excitation module, a signal processing module and an anti-interference module. The sensitive element module adopts a CoFeSiB amorphous wire as a core sensitive material, an enameled wire is uniformly wound on the periphery of the amorphous wire to form an inductance coil, and the giant magneto-impedance effect of the amorphous wire is converted into a voltage signal through the inductance coil; and the excitation module is used for generating and outputting a high-frequency alternating excitation signal and loading the excitation signal to two ends of the inductance coil, so that the amorphous wire generates impedance change related to the to-be-measured magnetic field intensity under the action of high-frequency current. Through modular design and multi-technology cooperation of an amorphous wire giant magneto-impedance effect, Wheatstone bridge anti-interference, a temperature compensation algorithm, a multi-layer close winding and impedance matching technology, the performance bottlenecks of a traditional magnetic field sensor in the aspects of sensitivity, anti-interference, temperature drift control and signal transmission efficiency are broken through. And high-precision and high-reliability wide-temperature-range magnetic field detection is realized.

The invention discloses a multi-antenna anti-interference method, multi-antenna anti-interference equipment, a storage medium and a program product, and aims to solve the contradiction between poor performance of a sub-array architecture and overhigh calculation complexity of a full-array architecture. The method comprises the following steps: carrying out global synchronization processing by taking all array elements as a whole, and determining a shared synchronization point; the array is divided into a plurality of sub-arrays, each sub-array uses the synchronization point and independently calculates a set of anti-interference weights, and accordingly, sub-array output signals subjected to interference suppression are generated; and determining a group of optimal merging coefficients through an optimization algorithm with the purpose of maximizing the final signal quality, and performing weighted merging on all sub-array output signals to generate a final output signal. In addition, the method also comprises a mechanism for periodically updating an anti-interference weight and a merging coefficient. According to the method, through step-by-step processing and optimal combination, the calculation complexity is effectively reduced, meanwhile, the performance loss of a traditional sub-array scheme is avoided, and the anti-interference performance of a system in a dynamic complex environment is improved.

The invention relates to the technical field of modular multilevel converter control, in particular to an active-disturbance-rejection direct-current side fluctuation suppression method based on an MMC alternating-current side fault working condition. The method mainly aims at solving the problems that an existing suppression scheme based on a PI controller is insufficient in performance and difficult in parameter adjustment, and a control scheme based on an active disturbance rejection controller is complicated in parameter debugging and difficult in obtaining optimal parameters although the performance is better. The method comprises the following steps: step 1, suppressing a negative sequence current generated by an MMC system when an alternating current side has a fault; step 2, constructing a second-order LADRC model; and step 3, current inner loop control is carried out by using a second-order LADRC controller set by a particle swarm optimization algorithm. According to the method, a traditional PI controller is replaced by the second-order LADRC controller, parameters are set in combination with the particle swarm optimization algorithm, the ride-through capacity of the MMC system under the alternating current side fault is remarkably improved, and better dynamic response and interference immunity are achieved.

The invention relates to the technical field of industrial automation electronic testing, in particular to an industrial control mainboard anti-interference performance evaluation system and method for a complex disturbance scene, and the system comprises a clock disturbance scene generation module, a dynamic clock interference injection module, a clock bus deterioration collection module and an anti-interference level output module. Wherein the clock disturbance scene generation module is used for generating a clock disturbance spectrum; the dynamic clock interference injection module is used for converting the clock disturbance spectrum into a frequency-phase dual-modulation signal and injecting the frequency-phase dual-modulation signal into the tested industrial control mainboard; the clock bus deterioration acquisition module is used for acquiring bus error code characteristics caused by clock disturbance in real time; and the anti-interference level output module is used for generating a four-level clock anti-interference level. According to the invention, by constructing a closed-loop system of disturbance injection-feature acquisition-grade evaluation, quantitative evaluation and stability determination of the anti-interference capability of the industrial control mainboard in a complex disturbance scene are realized.

This invention discloses a three-element leaky wave antenna array structure based on a dielectric ridge parallel plate waveguide, comprising: S1, designing a three-element array structure based on the coupling characteristics of the dielectric ridge parallel plate waveguide, wherein the two-port array antenna is fed by probes in parallel; S2, determining the slot design of the three elements according to the pattern product theorem and the relationship between slot size and leakage, thereby designing a scanning beam that meets the requirements of narrow beamwidth and high gain. This invention is a leaky wave antenna array structure with narrow beamwidth and high gain characteristics proposed to meet the requirements of high signal strength and strong anti-interference in long-distance point-to-point communication systems. This antenna can provide better directivity and higher communication quality, while ensuring that the antenna has the advantages of compact structure and small size, thus it can be applied to wireless power transmission systems such as satellite communication systems, radar systems, and the Internet of Things.

The invention relates to the technical field of wireless communication anti-interference, in particular to a communication transceiving method and system for adaptive frequency hopping filtering, and the method comprises the following steps: S1, collecting and storing channel state information for channel quality evaluation and interference behavior prediction through continuously monitoring the interference level, signal-to-noise ratio and frequency spectrum time sequence characteristics of a current communication channel; according to the invention, dynamic optimization generation of the frequency hopping pattern is realized through interference trend prediction and weighted correction based on the attention mechanism-LSTM network, and channel interference is effectively suppressed by combining interference residual feature prediction and adaptive filtering parameter pre-configuration and real-time optimization of the least mean square algorithm. And high-precision blind synchronization is completed through joint detection and maximum likelihood estimation by using implicit pilot frequency and chaos frequency hopping sequence characteristics, and cooperative improvement of anti-interference performance, synchronization reliability and data recovery accuracy of a communication link in a complex electromagnetic environment is finally realized.

The invention discloses a loop resistance measuring method, system and device, and relates to the technical field of electrical measurement. The method comprises the following steps of: performing loop data acquisition at each interface of the disconnecting switch adopting a three-channel wiring mode, injecting excitation current by an excitation source, and acquiring three-channel voltage original signals and initial sampling flow by a differential isolation amplifier to obtain the initial sampling flow; time sequence identification is carried out on the initial sampling flow to complete sample starting and ending point identification, inter-channel time alignment is completed, and a synchronous voltage sample set is output. According to the invention, by constructing a complete data chain covering high-precision synchronous sampling, adaptive signal processing, phase compensation calculation and intelligent statistical diagnosis, the problems of low measurement precision and insufficient anomaly identification capability caused by poor synchronism, phase error and lack of deep analysis in a traditional method are solved; the accuracy and anti-interference performance of loop resistance measurement and the intelligent level of state diagnosis are improved.

The invention relates to the technical field of communication, and discloses an anti-interference automatic synchronization frequency hopping method based on wireless networking. The method comprises the following steps: realizing adjacent node orientation identification through a low-power coding detection signal; establishing a narrow beam directional link based on the phased-array antenna; executing four times of timestamp exchange on a link to realize distributed high-precision clock synchronization; generating a link exclusive frequency hopping sequence in combination with the network root key, the synchronization time and the node identifier; and encrypted data transmission and link dynamic maintenance are completed under the cooperation of a directional beam and frequency hopping. According to the invention, through a space-time-frequency three-dimensional collaborative agility mechanism, the anti-interference performance, the low interception probability and the network synchronization robustness are improved.

The invention belongs to the technical field of water environment detection, and particularly relates to a heavy metal concentration and water body flow velocity synchronous detection method for a dispersed drain outlet, which is used for synchronously detecting the heavy metal cadmium concentration and the water body flow velocity. The core of the method comprises a three-electrode sensing system consisting of a working electrode coated with a tungsten oxide film, a reference electrode and a counter electrode, and is assisted by an electrochemical workstation, a peristaltic pump, a flow cell and a signal processing module. The cadmium concentration is accurately measured through the square wave anodic stripping voltammetry, the flow velocity is synchronously detected through the open circuit potentiometry, dual-function detection is achieved through integration of the square wave anodic stripping voltammetry and the open circuit potentiometry, synchronous in-situ detection of the cadmium concentration and the water body flow velocity is achieved, and errors caused by measurement position differences are effectively eliminated. The result shows that the cadmium concentration and the dissolution peak current are in a linear relationship, and the water flow velocity logarithm and the open-circuit potential are in a linear relationship. The method designed by the invention is suitable for scattered and small sewage draining exit scenes, and effectively solves the problems of time consumption and equipment redundancy of traditional step-by-step detection. In an actual water sample test, the cadmium recovery rate is 80%-120%, the flow velocity measurement RSD is smaller than or equal to 5.0%, high reproducibility, stability and anti-interference performance are achieved, technical support is provided for real-time online evaluation of the total heavy metal emission amount, and the method has remarkable environmental monitoring application potential.

The utility model relates to an anti-interference all-in-one machine which comprises a machine body, a shielding shell is arranged on the outer surface of the machine body, three shielding cases are installed in the shielding shell, and the three shielding cases cover the outer side of a CPU, the outer side of a hard disk and the outer side of a power source respectively. Three through grooves are formed in the surface of the shielding shell, and the tops of the three shielding covers are arranged in the three through grooves respectively. Heat dissipation holes are formed in one side of the upper surface of the shielding cover, a sleeve is installed on the outer surface of the shielding cover, the end of the sleeve penetrates to the outer side of the shielding shell, and a heat dissipation fan is installed in the sleeve. External electromagnetic radiation is shielded through the shielding shell, and then electromagnetic shielding is performed on the CPU, the hard disk and the power supply through the three shielding covers, so that external electromagnetic radiation entering the shielding shell can be reduced, and interference of electromagnetic radiation generated when the CPU, the hard disk and the power supply operate on other surrounding electronic components can be reduced; therefore, the anti-interference performance of the machine body is improved, and stable operation of the machine body is guaranteed.

The invention provides an acoustic-magnetic coupling backflow cable nondestructive testing and long-distance transmission integrated method and system, and relates to the technical field of backflow cable transmission detection, accurate fault identification and positioning are realized by sending acoustic-magnetic dual excitation signals to a backflow cable, collecting responses, extracting multi-source features and then performing fusion model analysis, and the detection accuracy is improved. The problem that a traditional method is low in detection precision is solved. After being coded and modulated, a detection result is stably transmitted to a receiving end through a long-distance transmission link, so that the integration of nondestructive detection and long-distance transmission of the acoustic-magnetic coupling backflow cable is realized, and the defect of instability of long-distance transmission is overcome. And a self-adaptive power amplification and frequency hopping anti-interference mechanism is adopted in the transmission process, so that the anti-interference performance, the stability and the environmental adaptability of signal transmission are improved, and the actual requirements of backflow cable detection and long-distance transmission in a strong electromagnetic interference environment and a complex working condition are met. By introducing a self-adaptive calibration mechanism and comparing with a reference signal, excitation and acquisition parameters are corrected in real time, and the detection precision and the long-term reliability are further improved.

The invention belongs to the technical field of power equipment state monitoring, and discloses a transformer discharge detection method and system with an anti-interference function, and the method comprises the steps: obtaining a multi-mode discharge original signal of a transformer, carrying out the synchronization of a coefficient through a channel, anchoring a synchronous interference signal, extracting initial multi-dimensional features, and carrying out the detection of the multi-mode discharge original signal. Performing weighted average fusion on the initial multi-dimensional features according to a channel synchronization coefficient to obtain an anti-interference feature vector; constructing a feature screening-interference immune lightweight neural network model, inputting anti-interference features, taking a channel synchronization coefficient as an interference immune factor, and outputting a discharge type identification result; and obtaining an evaluation index by combining the peak amplitude of the multi-mode discharge original signal of the transformer after the de-noising preprocessing, and obtaining a discharge risk level based on the evaluation index. According to the invention, accurate identification and risk grade evaluation of transformer discharge are realized, and the problems of poor anti-interference performance and the like are solved.

The utility model belongs to cable technical field especially relates to a kind of bend-resistant sensor cable for high-speed train set, the cable with high elasticity fiber rope as center filling rope, filling rope outside evenly distributes multiple copper alloy conductors, conductor is covered in proper order insulating layer, first wrapping layer, shielding layer, second wrapping layer and sheath layer;Wherein insulating layer uses thermoplastic polyester elastomer, first wrapping layer is thin type flame-retardant cloth, shielding layer is composed of tinned copper wire and fiber silk, second wrapping layer is thin type non-woven fabric, sheath layer is crosslinking type polyurethane.The utility model by optimizing conductor material, insulation and sheath material selection and multilayer structure design, significantly improve the bend-resistant performance of cable, while having excellent electrical insulation, shielding anti-interference and flame retardancy, can long-term stable adapt to frequent bending, vibration and complex environment in high-speed train set operation, meet the reliable transmission demand of sensor signal.

The invention discloses a fire-fighting fire scene communication device and method suitable for a smog environment, relates to the technical field of fire scene communication, and solves the technical problems that an optimal path is difficult to select, an antenna pattern is reasonably adjusted, obvious defects exist in dynamic nature, anti-interference performance, coverage capability and safety, and fire scene communication safety is affected. The direction of an interference source is monitored in real time through an array antenna, and an antenna pattern is dynamically adjusted in combination with a signal quality evaluation result. And calculating a weight coefficient of an antenna array element by adopting an MVDR algorithm, so that a main lobe direction is aligned with a target signal. And voice and position data are encrypted by adopting a quantum key distribution or post-quantum encryption algorithm, so that malicious interception or tampering in a fire scene is prevented. In combination with a hybrid model of a CNN convolutional neural network and an RNN recurrent neural network, preset fire scene interference noise is specifically identified and removed in real time. And calculating an optimal path from the source node to the target node based on the corrected link cost.