1546 results about "Transverter" patented technology

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The invention relates to the technical field of automatic control, in particular to an efficient magnetic suspension water chilling unit control system which comprises a refrigerant flow monitoring module, a dynamic flow adjusting module, a start-stop delay judging module, a temperature gradient sensing module and a frequency self-adaptive adjusting module. According to the method, the temperature difference curve is established through real-time monitoring data, the refrigerant flow synchronism is analyzed, temperature difference abnormity can be accurately recognized, the refrigerant adjusting requirement is extracted, traditional threshold value judgment lag is avoided, the refrigerant flow is controlled in real time, fluctuation impact is buffered, and the adjusting precision is improved by dynamically adjusting the opening degree of the electronic expansion valve and the rotating speed of the circulating pump; the method has the advantages that starting and stopping conditions are accurately judged, misoperation is reduced, early positioning of thermal imbalance is achieved through temperature difference sensing of an evaporator, a compression cavity and a condenser and establishment of an internal temperature difference distribution diagram, energy efficiency reduction is avoided, the frequency of a frequency converter is adjusted according to temperature difference distribution, the optimal load is matched, frequency adaptivity and system load response are improved, and refrigeration cycle energy efficiency is optimized.

The invention provides a frequency converter dynamic fault diagnosis method and system based on a multi-brand load test platform. According to the method, multiple real-time operation parameter sets are acquired, the amplitude attenuation threshold and the frequency fluctuation interval of a voltage waveform fragment are dynamically adjusted according to a load mode configuration file, the dynamic voltage reference parameter corresponding to the current load mode is generated, and then the actual waveform and an expected current phase curve are compared frame by frame; the method comprises the following steps: firstly, calculating to obtain a phase offset, then constructing a multi-dimensional operation characteristic spectrum, then carrying out time sequence cross validation on a sudden change time node of a power factor jump trajectory and an abnormal waveform position in a harmonic distortion incidence matrix, outputting an abnormal mode code, and finally, matching a load adaptation grade constraint condition to generate a diagnosis report; according to the technical scheme provided by the invention, the fault diagnosis precision and the cross-brand system adaptation capability in a complex load scene are remarkably improved, and the problem of misjudgment of a single brand threshold rule in a multi-device scene is effectively solved.

The invention belongs to the technical field of intelligent control, and particularly relates to a water pump multi-mode intelligent control method based on a PLC. Operation parameters are acquired in real time through a data acquisition module, a target mode is selected from constant-pressure water supply, constant-flow water supply, energy-saving optimization and fault emergency modes through a mode judgment module according to preset triggering conditions, and an operation strategy including a start-stop sequence, a target rotating speed, a frequency converter output frequency and a pressure set value is generated through a strategy generation module. The control execution module converts the strategy into a control instruction and outputs the control instruction to the water pump driving module, and linkage operation and mode switching of the multiple water pumps are achieved in combination with the mode linkage module. And the recording and optimizing module is used for storing and analyzing the operation data and optimizing mode switching conditions and operation strategies. Self-adaptive control and multi-pump cooperative scheduling in multiple modes are achieved, the stability and energy saving performance of a water supply system are improved, and the service life of equipment is prolonged.

The invention relates to the field of pump set control, in particular to a multi-modal pump set dynamic optimization control method and system, and the method comprises the steps: collecting the current waveform, pressure pulsation spectrum and flow time sequence data of each unit of a pump set through a distributed sensor array, and carrying out the time-frequency domain fusion processing to generate an operation state tensor; and inputting a multi-modal identification neural network, and outputting a dominant modal identifier and a modal confidence vector. And according to the modal confidence, activating a basic optimization strategy library or executing cross-modal strategy collaboration, and generating an optimization instruction. And dynamically selecting an instruction conversion path to obtain a frequency converter parameter set, loading the frequency converter parameter set to a programmable logic controller, and driving an execution mechanism to converge a moving track. The method can effectively cope with changes of multi-mode operation states and complex working conditions, and dynamic optimization of the pump set is achieved.

The invention relates to the technical field of frequency converter anomaly detection, in particular to a hydraulic engineering frequency converter state detection method and system. The invention aims to improve the accuracy of abnormal data point detection in the frequency converter performance parameter time sequence data, and particularly focuses on the influence of environmental factors on performance parameters. Performance parameter time sequence data and environment parameter time sequence data are synchronously obtained, discrete wavelet transform is used for decomposing performance parameters in a multi-layer mode, and approximation coefficients are mainly analyzed to insight the operation state of the frequency converter. And after the suspected abnormal data segments are preliminarily screened, environment abnormal indexes are calculated in combination with environment parameters, and fluctuation degree values of the suspected abnormal data segments are analyzed. And based on the environmental anomaly index and the fluctuation degree value, adaptively adjusting the initial threshold value of each approximation coefficient to obtain an adaptive threshold value, and finally detecting abnormal data based on the adaptive threshold value. According to the method, abnormal data points caused by environmental factors can be effectively eliminated, and abnormal data points caused by abnormity of the frequency converter can be accurately identified.

The invention relates to the technical field of frequency converter harmonic control, in particular to a harmonic control method, system and device applied to a frequency converter, and the method comprises the steps: obtaining the current data of a rectification input side and an inversion output side of the frequency converter; obtaining the difference coefficient of the overall pulsation amplitude change of each period and the irregular coefficient of the corresponding pulsation time change, and further obtaining the harmonic influence coefficient of the rectification input side current of each period with the pulsation amplitude difference and irregular characteristics; calculating a deviation coefficient and a jitter abnormal coefficient of the inversion output side current of each period so as to obtain a harmonic influence coefficient of the inversion output side current of each period having waveform deviation and rapid jitter; therefore, the harmonic delay superposition interference coefficient is obtained, and the output current of the inverter is corrected in combination with the current data of the inverter output side. The harmonic control precision of the frequency converter can be improved.

The invention discloses a spraying system capable of intelligently adjusting air balance of a whole line. The spraying system comprises an air supply and exhaust control unit, a multi-dimensional sensor unit and a control unit. The air supply and exhaust control unit comprises a plurality of air supply and exhaust systems which are applied to a feeding and discharging area, a heating chamber, a manual and automatic dust removal area, a slitting area, a UV curing area and a spraying room respectively and structurally comprises a high-pressure fan, an air supplement fan, an environment air supply box, a proportional valve, a circulating fan and a waste discharge fan, and it is ensured that the air volume and the pressure difference of all the areas are controllable. The multi-dimensional sensor unit is used for collecting air volume, pressure difference and VOC concentration data of each area. The control unit comprises a PLC (Programmable Logic Controller), a frequency converter group and an industrial personal computer, and is used for executing a PID (Proportion Integration Differentiation) control strategy and adjusting the rotating speed of a fan and the opening degree of a proportional valve based on sensor data through a wind balance control algorithm and a VOC concentration control algorithm so as to realize the stable control on the wind balance of the whole line and the VOC concentration of the spraying room. According to the system, various air supply and exhaust mechanisms and intelligent control algorithms are integrated, and the environment control precision and efficiency in the spraying process can be effectively improved.

This disclosure describes an auto-calibration of mixers in a quantum orchestration platform. Predistortion is computed according to an RF signal that is downconverted with a local oscillator tone that is offset from an upconverter tone. Three tones present in the original RF signal are distinguished and used to construct a cost function. The minimization of the cost function is used to cancel an unwanted LO leakage and an image tone. Because the quantum orchestration platform generates both the unconverted IQ signals and the cost function for their optimization, the optimization can be performed in real time inside a single device without the need to communicate with external devices. This allows for the optimization of single sideband upconverted signals in a fraction of the time it typically takes using distributed systems employing separate waveform generators and spectrum analyzers.

The invention discloses a plug-in circuit breaker power supply device of a power distribution box, and particularly relates to the technical field of power distribution boxes, the plug-in circuit breaker power supply device comprises an insulating frame body, a regulation and control assembly is arranged on the insulating frame body, the regulation and control assembly comprises a central partition plate arranged in the insulating frame body, and a plurality of current converters are plugged on the central partition plate; supporting insulating frames are arranged on the two sides of the bottom of the center partition plate. The first conductive connecting strip, the second conductive connecting strip and the current collector are rapidly separated in a rotating rod deflection mode, the insulation performance is effectively ensured, rapid opening and closing are easy, the second conductive connecting strip can make contact with the third conductive connecting strip, the signal conversion and transmission function is achieved, and the service life is prolonged. And the fourth conductive connecting strip can transmit a current signal on the current frequency converter to the other current collectors after being transferred by the fourth conductive connecting strip, and each structure realizes a rapid opening and closing current conversion mode, so that the insulation performance of the device during use can be effectively ensured.

The invention discloses a direct-current voltage self-balancing method in the high-low voltage ride-through process of a high-voltage frequency converter, and the method comprises the steps: obtaining an electric signal of the high-voltage frequency converter, calculating the Lyapunov index of a system in real time based on the electric signal, so as to quantify the chaotic state of the system, and generating a real-time Lyapunov index sequence; according to the real-time Lyapunov index sequence, the gradient of the real-time Lyapunov index sequence relative to a preset system state variable is determined, and a Lyapunov gradient field is constructed; using the Lyapunov gradient field to generate a basic control quantity through nonlinear mapping; and converting the basic control quantity into a pulse width modulation parameter to form a PWM control signal set to be applied to the high-voltage frequency converter. According to the method, the Lyapunov gradient field is constructed to provide prospective direction guidance for control, so that the chaotic oscillation is quickly suppressed, and the dynamic stability of the system under power grid disturbance is remarkably improved.

The invention discloses a wind turbine generator grid-connected system oscillation suppression method based on a network construction type energy storage transverter, which comprises the following steps of: constructing a port characteristic model of the network construction type energy storage transverter, constructing an equivalent admittance model of a wind turbine generator based on the port characteristic model, obtaining a signal flow diagram, and calculating the oscillation of a grid-connected system of the wind turbine generator according to the model and the signal flow diagram. According to the method, an equivalent admittance model of the wind turbine generator with the impedance characteristic of the constructed energy storage converter is obtained, so that a negative sequence impedance remolding control strategy based on virtual parallel impedance is designed, and finally, control parameters in the remolding control strategy are optimized, so that the oscillation phenomenon in the direct-driven wind turbine generator grid-connected system is inhibited. According to the invention, through implementing a control strategy on the network-forming type energy storage converter, impedance coupling of an interconnection system is suppressed, and through virtual parallel impedance, an impedance interaction effect between the new energy equipment and the network-forming type energy storage converter is weakened, so that effective suppression of system oscillation is realized; and it is ensured that the direct-driven wind turbine generator grid-connected system can maintain a safe and stable operation state.

The invention discloses a dust removal fan frequency conversion control method and related equipment, and relates to the technical field of video control. The method comprises the steps that a training data set is generated based on historical video data of an iron notch area in the blast furnace tapping process; constructing an initial artificial intelligence model, and training the initial artificial intelligence model by adopting the training data set to obtain a target artificial intelligence model representing a mapping relationship among the dust concentration, the spark intensity and the fan frequency; based on the target artificial intelligence model and the current dust concentration feature and the current spark intensity feature in the current video data, the target fan frequency of the current tapping stage is determined; and generating a control signal based on the target fan frequency so as to adjust the operation frequency of the dust removal fan frequency converter through the control signal.

The invention discloses an energy-saving and consumption-reducing control method and system for a multi-stage variable frequency driven underground belt conveyor, and the method comprises the steps: obtaining coal flow data and conveying belt operation speed data according to a coal flow weight signal and an operation speed signal, and carrying out the filtering processing; abstracting and constructing a type-2 fuzzy set of the input parameters; and starting the belt conveyor, and performing multi-stage accurate control on the belt conveyor in combination with the two-degree-of-freedom PID and the type-II fuzzy set. According to the system, a coal flow monitoring sensor is installed on a belt conveyor; the speed sensor is mounted on the driving roller; the composite frequency conversion unit comprises a main frequency conversion unit and auxiliary frequency conversion units I and II, the main frequency conversion unit comprises a main frequency converter and a main motor which are connected, and each auxiliary frequency conversion unit comprises an auxiliary frequency converter and an auxiliary motor which are connected; the controller is connected with the coal flow monitoring sensor, the speed sensor, the composite frequency conversion unit and the human-computer interaction interface. According to the method and the system, multi-stage accurate control on the running speed of the belt conveyor can be realized, and the energy-saving effect is ideal.

The invention provides an intelligent harmonic dynamic compensation method and system for a data center. Wherein the dynamic coupling model is established through multi-dimensional data fusion. The method comprises the following steps: firstly, collecting equipment vibration, noise and electric energy quality data, and constructing a coupling model containing a vibration mode characteristic, a noise characteristic and harmonic distortion rate mapping relation; the heating and ventilation equipment operation condition is analyzed based on the model, and energy distribution caused by working medium flow and a motor is quantified into a working condition coefficient to be fed back to the model through frequency spectrum energy calculation. The nonlinear characteristic that electric energy harmonic changes along with loads is combined, the rotating speed range of the device is dynamically matched through frequency converter data, and the rotating speed difference of the device is mapped to a harmonic offset component generated by the frequency conversion device. And finally, generating an equipment parameter adjustment value matched with the current working condition, and realizing dynamic adaptation of harmonic compensation. According to the technical scheme provided by the invention, collaborative optimization of data center harmonic compensation and equipment operation conditions is realized.

The utility model discloses a cluster channel machine based on RF Transceiver software radio, which comprises an FPGA, a DSP, an ARM, a clock management chip, an LNA, a PA, a DSA and a SAW Filter, the FPGA is respectively connected with the DSP, the ARM, a Flash3 and the clock management chip, the DSP is connected with an SDRAM1 and a Flash1, the ARM is connected with an SDRAM2 and a Flash2, the clock management chip is connected with a TCXO, the cluster channel machine comprises an RF Transceiver connected with the FPGA and the clock management chip, the input end and the output end of the RF Transceiver are both connected with the SAW Filter, and the input end and the output end of the RF Transceiver are connected with the LNA, the PA, the DSA and the SAW Filter. And the LNA, the PA, the DSA, the SAW Filter and the RF Transceiver are sequentially connected and arranged to form an RF RX receiving channel and an RF TX transmitting channel. According to the utility model, the circuit of an RF transmitting and receiving channel is simplified, multiple paths of radio frequency signals can be directly adopted, the radio frequency signals from 300MHz to 6GHz are output, and the functions of digital filtering, digital up and down converters, digital combination, modulation and demodulation, automatic power control and the like are integrally realized; different functions can be realized by loading different waveforms, different requirements can be met without changing hardware, the cost, the power consumption and the size are reduced, the debugging process is reduced, and the production is more convenient.

The invention relates to the technical field of wire drawing machine frequency converter control. The invention relates to a control method and device for a frequency converter of a wire drawing machine, computer equipment and a storage medium, and the method comprises the steps: obtaining the tension feedback information of the wire drawing machine, carrying out the tension error calculation of the tension feedback information of the wire drawing machine, according to the real-time tension deviation value, the output frequency of the frequency converter is corrected through a nonlinear correction algorithm, the corrected output frequency of the frequency converter is obtained, and according to the corrected output frequency of the frequency converter, operation control information of the frequency converter of the wire drawing machine is generated so as to adjust operation parameters of the frequency converter of the wire drawing machine. The frequency converter control method has the effect of accurately controlling the frequency converter.

The invention discloses a movable trolley for secondary grouting of a double-shield TBM, and belongs to the technical field of tunnel construction equipment. In order to solve the problems of non-uniform slurry mixing, inaccurate grouting pressure control, low automation degree and the like of existing double-shield TBM secondary grouting equipment, a slurry storage system and a grouting execution system are borne through a movable supporting table, and the slurry storage system achieves slurry storage and stirring regulation and control through double storage tanks, a spiral stirring paddle and a liquid level monitoring module; the grouting execution system achieves accurate pressure control through cooperation of a double-outlet grouting pump, a pressure sensor and a frequency converter. The central controller receives liquid level and pressure signals and intelligently regulates and controls the rotating speed of the stirring paddle, the rotating speed of the grouting pump and switching of the slurry storage tank. The movable trolley is mainly used for secondary grouting operation in the double-shield TBM construction process, the grouting efficiency and quality can be improved, and tunnel construction safety and stability are guaranteed.

The invention discloses a frequency converter multi-stage cooperative rapid overcurrent protection circuit, and the overcurrent protection circuit cooperates with an IGBT inverter circuit, an IGBT drive circuit, a current sampling circuit and a master control MCU of a frequency converter to construct a three-stage cooperative protection system composed of hardware-stage extreme rapid protection, hardware-stage rapid protection and software-stage intelligent protection. And independent action and information interaction between the stages can be realized through circuit design. Compared with the prior art, protection blind areas are eliminated, nanosecond-microsecond level extreme protection is achieved, a multiple and high-reliability redundancy protection system is constructed, intelligent grading processing of faults is achieved, and the diagnosability of the system is enhanced.

The invention discloses a hybrid power device type three-level frequency converter common-mode voltage suppression method and device, and the method comprises the steps: carrying out the amplitude comparison of three-phase given reference voltage sinusoidal signals, and obtaining the maximum value, the intermediate value and the minimum value of the three-phase given reference voltage sinusoidal signals; respectively adding the maximum value, the intermediate value and the minimum value of the three-phase given reference voltage sinusoidal signal with the injected zero sequence voltage to obtain the maximum value, the intermediate value and the minimum value of the three-phase modulation signal; on the basis of introducing common-mode voltage suppression and neutral-point potential balance, a maximum value, an intermediate value and a minimum value in a three-phase modulation signal after zero-sequence voltage injection are respectively compared with three carriers to generate switching signals, and the switching signals act on the hybrid power device combined three-level frequency converter to realize common-mode voltage suppression. According to the invention, the service life can be prolonged by reducing the common-mode voltage of the frequency converter, and the midpoint potential fluctuation of the three-level frequency converter can be reduced.

The invention discloses a satellite communication terminal shared by a high-throughput satellite and a low-orbit constellation. The satellite communication terminal comprises a radio frequency cabin and a baseband cabin which are rotationally connected with each other, an active phased array transceiving antenna surface, a frequency converter, a power divider and a combiner are integrated in the radio frequency cabin; a high-throughput baseband, a low-orbit baseband, a carrier signal receiver, an upper computer, an inertial navigation unit and a Beidou antenna module are integrated in the baseband cabin; according to the invention, the base band of the high-throughput satellite and the base band of the low-orbit constellation are integrated and designed in the same terminal, the advantages of the two satellites are brought into full play, the coverage is wide, the delay is low, the burden of front business personnel is reduced, and network-free obstacles are eliminated; the problem that the use rate of a high-throughput satellite communication terminal is high is solved, and the communication cost is reduced by one order of magnitude in an area covered by a low-orbit satellite. The problems that low-orbit constellation networking construction is lagged and all areas cannot be covered are solved, and in the area without low-orbit constellation coverage, a user can be temporarily switched to a high-throughput satellite to keep in the network all the time.

The invention discloses a partial discharge fusion detection method based on multiple sensors, and relates to the field of power system detection, and the method comprises the steps: S1, multi-modal sensor cooperative deployment: firstly, after the multi-modal sensor cooperative deployment in S1 is completed, S2, time-space synchronization data collection is carried out, and then S3, signal preprocessing and feature extraction are carried out after the time-space synchronization data collection in S2 is completed; and S3, after signal preprocessing and feature extraction are completed, performing S4, feature level fusion innovation, when the S4, feature level fusion innovation is completed, performing S5, a decision level fusion mechanism, and finally performing S6, three-dimensional visualization and early warning after the S5, the decision level fusion mechanism is completed. According to the partial discharge fusion detection method based on the multiple sensors, in the strong interference environment of the frequency converter, the false alarm rate is compressed from 68% to 11% through multi-sensor cooperative noise reduction and dynamic weight distribution, and the anti-interference capability of the system is remarkably improved; and centimeter-level positioning precision is realized, and powerful support is provided for accurate fault positioning.

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

The invention discloses a cascade H-bridge frequency converter fault early warning method, which comprises the following steps of: acquiring field current signals of each H-bridge unit, performing bidirectional verification on signal zero points by adopting a reverse zero-crossover reconstruction method, and generating a reconstruction timestamp matrix; carrying out phase space differential mapping based on the matrix, and extracting a feature matrix capable of representing internal dynamic characteristics of the system by calculating topological invariants such as track length and curvature; after dimension reduction is conducted on the feature matrix, affinity matching is conducted on the feature matrix and a preset fault mode library through an immune memory prediction mechanism, rapid fault recognition is achieved, and prediction feature vectors are generated through extrapolation; and the prediction features, the residual error and the memory activation degree are combined, a quorum sensing collaborative judgment model is introduced, the diffusion process of abnormal signals is simulated, collaborative and robust judgment of the fault type, the occurrence time and the influence range is achieved, and an early warning instruction is generated. According to the method, the accuracy, reliability and advance of fault early warning are remarkably improved.

The invention discloses an intelligent transportation management system and method for a long-distance two-way transportation belt conveyor. According to the system, an anti-explosion frequency converter and an emergency stop device are connected with a driving motor; the test roller is mounted on the rack; the speed sensor and the vibration sensor are connected with the test roller. The image acquisition module is supported above the belt conveyor; the longitudinal tearing sensor is mounted on the rack; the radio frequency tag is embedded in the conveying belt, and the reader is supported above the rack; the method comprises the steps that the data collection assembly collects the running state of the conveyor in real time; the edge calculation module controls the rotating speed of a driving motor by using an explosion-proof frequency converter based on the coal flow proportion, and performs closed-loop adjustment in combination with the running speed data of the conveying belt; the edge calculation module senses the abnormal operation condition based on the vibration data and the tearing data, and senses the local deviation condition based on the positioning module. According to the system and the method, intelligent management of the running process of the belt conveyor can be realized.

A receiver includes an antenna block configured to transduce impinging electromagnetic signals into electrical signals; a signal conditioning block configured to condition electrical signals received from the antenna block; and a down-converter block configured to down-convert conditioned electrical signals received from the signal conditioning block. The down-converter block comprises a plurality of signal channels. The receiver further includes a plurality of analog-to-digital converters (ADCs) respectively connected to the signal channels of the down-converter block; and a field-programmable gate array (FPGA). The FPGA is configured to program the down-converter block by selecting a set of mixer frequencies and a set of bandwidths designed to remove interference signals in each signal channel. The selections are calculated to mitigate reductions in dynamic range in the ADCs due to interference. The FPGA is further configured to process digital signals received from the ADCs after the down-converter block has removed the interference signals.

The invention belongs to the field of frequency converter production and manufacturing, and discloses a frequency converter assembly line which comprises an annular conveying line, and automatic frequency converter component assembling equipment, a truss manipulator, an NG cache machine, a frequency converter component cache unit, a power-on debugging system, hoisting equipment and a manual frequency converter assembling unit which are arranged on the outer edge of the annular conveying line, and a wire inner and outer manual assembly unit pretreatment workbench is configured. The frequency converter assembly line is high in assembly efficiency, good in stability and high in applicability, supports collinear production of different types of frequency converters, supports a production mode of combining manual assembly and automatic assembly, and supports assembly line type assembly work and fixed type assembly work at the same time.