282 results about "Channel power" patented technology

The invention discloses a grid-connected inverter control method based on second-order linear active disturbance rejection, and particularly relates to the field of grid-connected inverter control. Voltage and frequency error signals between the output side of the inverter and the power grid are obtained, a pre-synchronization control model is constructed, and voltage amplitude and frequency synchronization is achieved; a second-order linear active-disturbance-rejection controller is introduced in the frequency synchronization control process, an extended state observer is adopted to estimate the output frequency, the frequency change rate and a disturbance term, and a state error feedback control law is combined to generate a frequency regulation control quantity, so that accurate frequency control is realized; after grid connection, a dual-channel LADRC power regulation controller is constructed, and decoupling tracking control is carried out on active power and reactive power; meanwhile, on the basis of fast Fourier transform processing as a stable grid-connected state criterion, the method has the advantages of being high in control precision, high in anti-interference capability, good in current waveform quality, high in adaptability and the like, and is suitable for various grid-connected application scenes.

The invention is applicable to the technical field of power distribution network monitoring, and provides a power grid monitoring-oriented power adaptive congestion control method, which comprises the following steps of: acquiring a network performance index and a power grid operation parameter of a power grid monitoring data transmission network, and determining a congestion state of a current network through a preset congestion evaluation model; a 5G ad hoc network node connection strength coefficient, a new energy monitoring data priority label, a west-to-east transmission channel power flow fluctuation coefficient and a regional vulnerability index are used as decision variables, and the minimum weighted transmission delay, the packet loss rate and the maximum new energy consumption responsivity are used as objective functions. Generating a control strategy corresponding to the current network congestion state according to the hybrid intelligent optimization model fusing reinforcement learning and a genetic algorithm; executing the control strategy to dynamically adjust the network resources; monitoring the execution effect of the control strategy, and feeding the result back to the model to update the parameters; and therefore, the requirements of multi-target optimization and differential service quality in a complex power grid monitoring scene can be met.

The invention provides a satellite communication system with multi-mode capability and a communication method, and belongs to the technical field of satellite communication. A signal processing module of the system comprises a load control unit and a baseband processing unit, the load control unit is responsible for beam correlation calculation, transmission rate control, antenna channel power-on and power-off control and the like, the baseband processing unit is used for processing uplink and downlink signals, and the downlink supports multiple modes. The frequency conversion processing module is provided with an upper frequency conversion channel and a lower frequency conversion channel which respectively process transmitted and received signals. And the wide-beam receiving antenna is responsible for receiving uplink data. The phased array transmitting antenna is responsible for transmitting downlink data, is high in gain and fast in pointing adjustment, and supports multiple modes. According to the communication method, satellite transmitting and receiving are started by default, and transmitting serves as a beacon to assist a user in capturing. According to the invention, the working modes can be flexibly switched, the telemetering downloading capability and the information broadcasting efficiency are improved, and diversified communication requirements are met.

The invention discloses a multichannel synchronous impedance measurement system and an impedance measurement method, the multichannel synchronous impedance measurement system comprises a signal generation module, a multichannel signal acquisition module, a control module and a display and operation module. The signal generation module comprises a DDS chip and a programmable control operational amplifier and is used for applying current excitation signals to two ends of a to-be-tested system, the multi-channel signal acquisition module comprises at least two multi-channel ADCs and realizes synchronous acquisition through a synchronous trigger circuit, and the control module realizes ADC data receiving and real-time calibration algorithm through an FPGA. And the display and operation module realizes measurement mode selection and result display. The method has the characteristics of high measurement precision and low single-channel power consumption, and signal leakage of adjacent channels is detected; 0.1%, 8 channels synchronously acquire time sequence deviation lt; the temperature drift is 1t after continuous working for 24 hours in 50ns; and 10 ppm.

The embodiment of the invention provides a channel power spectrum estimation method based on measurement report data and related equipment. The method comprises the following steps: acquiring multiple pieces of measurement report data of a communication system to be tested; inputting each piece of measurement report data into a data positioning model for prediction processing to obtain a prediction position corresponding to each piece of measurement report data; based on each piece of measurement report data and the corresponding prediction position, communication grid division is carried out on each piece of measurement report data to obtain a division grid set, and the division grid set comprises a communication grid index of each piece of measurement report data; determining average grid report data of a plurality of pieces of measurement report data in each communication grid based on the divided grid set, and determining a grid center position of each divided grid; and performing estimation calculation based on the average grid report data and the grid center position to obtain an estimated channel power spectrum from the base station to each communication grid, thereby improving the accuracy and robustness of power spectrum estimation.

The invention provides a time-sharing multi-channel power distribution system and a control method thereof, and the system comprises a microwave excitation source which is used for generating a continuous wave radio frequency signal; the common end of the multi-channel radio frequency switch is connected with the output end of the microwave excitation source, and the multi-channel radio frequency switch is used for switching a radio frequency signal to any one of a plurality of output channels of the multi-channel radio frequency switch in a time-sharing manner; the control module is electrically connected with the control end of the multi-channel radio frequency switch, and the control module is used for outputting a control signal according to a preset time sequence so as to drive the multi-channel radio frequency switch to be switched among different output channels; the directional protection module is connected between the microwave excitation source and the multi-channel radio frequency switch and is used for guiding reflection power from an output channel to a matched absorption load, so that the inherent problem of power division attenuation of a traditional power divider is solved; therefore, each output channel can obtain almost all original input power in the working gap, thereby greatly improving the power utilization rate and the transmission efficiency.

The invention provides a covert communication method based on STAR-RIS and full-duplex cognitive interference. The method comprises the following steps: establishing a covert communication system model based on STAR-RIS and full-duplex cognitive interference; based on a binary hypothesis testing problem, evaluating a false alarm probability and a missed detection probability of hidden user UR spectrum interception; calculating the false alarm probability, the missed detection probability and the detection error probability of malicious monitor UW detection based on the average receiving power of the malicious monitor UW and the judgment criterion; obtaining the optimal detection threshold and the minimum detection error probability of the malicious monitor UW based on the definition of the detection error probability and the monotonicity of the false alarm probability and the missed detection probability under different classifications; the minimum average detection error probability of the malicious monitor UW is calculated based on the statistical magnitude of the channel hypothesis and the channel power gain. According to the method, the interference signal is transmitted by adopting the full-duplex hidden user, hidden communication is ensured, the inhibition effect of the interference of the direct and cascade double links on monitors in the same area is better, and the probability that information is detected can be effectively reduced.

The invention discloses a device and a method for regulating and controlling the uniformity of wafer horizontal electroplating under the cooperative control of anode and cathode double partitions, which are applied to the technical field of semiconductor manufacturing, and the key points of the technical scheme are as follows: the device comprises an electroplating cavity, a partition anode device is coaxially arranged at the bottom of the electroplating cavity, and the partition anode device is composed of a plurality of independently controlled concentric annular regions; a plurality of electroplating liquid supply openings are formed in the electroplating cavity in the circumferential direction, and annular flow equalizing plates with fixed interval holes are connected to the liquid supply openings; a partition auxiliary cathode device is arranged in the wafer clamping device, the wafer clamping device is composed of a plurality of annular metal sheets concentric with the wafer, the metal sheets are connected with different channels of the multi-channel power supply respectively, and the material of the metal sheets is the same as that of the electroplated metal; the channel modules of the multi-channel power supply are connected in parallel, and current parameters can be independently adjusted; the method has the technical effects that the problems of edge effect and center underplating in the wafer electroplating process are reduced, and the flexibility of the wafer electroplating process is improved.

The invention relates to the technical field of output sharing control, in particular to a multi-path power regulator control method and system, and the method comprises the following steps: collecting real-time data to establish a data queue, calculating a mean value and a standard deviation to generate a dynamic operation baseline, collecting the real-time data to establish the queue, calculating the mean value and the standard deviation to generate a dynamic baseline, the method comprises the following steps: calculating an adaptive over-current and open-phase alarm threshold based on a baseline, adding an external control quantity to obtain a total power demand, adjusting the number of cycles according to the stability of a load, reducing the number of active whole waves in proportion when the number exceeds the limit, and stopping a thyristor triggering instruction when the current or voltage abnormally and continuously reaches a preset count. According to the method, the self-adaptive threshold is calculated by establishing the dynamic operation base line in combination with the fluctuation amplitude and the sensitivity factor, current and voltage abnormity is specifically recognized, the total cycle number and the active whole wave number are adjusted in combination with the external power requirement and the load stability, single trigger angle control dependence is avoided, and power distribution balance and electric energy supply stability are achieved; and the equipment damage risk is reduced.

A method for determining a bitrate allocation of a plurality of optical channels in an optical transmission link with discretized channel bitrates, the method comprising determining an initial discretized bitrate allocation and a corresponding initial power allocation for the plurality of optical channels for supporting the initial discretized bitrate allocation with the proviso that all optical channels meet a pre-defined optical signal-to-noise, OSNR, threshold for the respective initial discretized bitrate allocated to the respective optical channel; starting from the initial power allocation, varying, for an investigated optical channel of the plurality of optical channels, a channel power of the investigated optical channel to estimate a highest supported discretized bitrate for the investigated optical channel, wherein the highest supported discretized bitrate is the highest discretized bitrate for which the investigated optical channel meets a corresponding OSNR threshold; including the investigated optical channel in an upgrade candidate subset of the plurality of optical channels for potential bitrate upgrades based on the highest supported discretized bitrate exceeding the initial discretized bitrate for the investigated optical channel; and providing the upgrade candidate subset to an upgrade allocation algorithm.

The invention discloses a downlink precoding method and device, electronic equipment, a storage medium and a program, and is applied to a sending end, the method comprises the following steps: obtaining communication configuration information, and determining an average interference power leakage coefficient of different users on scheduled subcarriers according to the communication configuration information; determining an average channel power and an array response vector of each user based on the communication configuration information; according to the average interference power leakage coefficient, the average channel power and the array response vector, determining a downlink precoding vector of each user according to an average signal leakage noise ratio maximization criterion; and obtaining a downlink transmission signal of each user, and performing weighting processing on the transmission signal of each downlink user according to the downlink precoding vector of each user, thereby obtaining a downlink transmission signal corresponding to each downlink transmission beam. According to the embodiment of the invention, the problem of asynchronous interference among different users in the mobile phone direct connection satellite communication system can be solved, and the downlink transmission performance of the multi-beam satellite mobile communication system can be improved.

Methods, systems, and devices for wireless communications are described. The described techniques may enable a wireless device to calculate a closed loop power control parameter for a physical uplink shared channel (PUSCH) message in a random access channel (RACH) procedure in cases where one or more RACH preambles are transmitted in slots with a different slot type (e.g., half-duplex (HD) or subband full-duplex (SBFD)) than a slot used to transmit the PUSCH message. For example, the wireless device may determine a power ramping parameter based on a total quantity of preambles transmitted. Additionally, or alternatively, the wireless device may determine a power ramping parameter based on a quantity of preambles transmitted via slots of the first slot type (e.g., and not preambles transmitted via slots of the different slot type). Additionally, or alternatively, the wireless device may apply a power ramping adjustment parameter.

The invention provides a method and device for determining SRS power control adjustment state information, and relates to the technical field of communication. The method comprises the following steps: receiving downlink control information sent by network equipment; the downlink control information comprises one or more of the following information: a plurality of pieces of transmission power control (TPC) information corresponding to the same carrier / cell and used for determining power control adjustment state information of a sounding reference signal (SRS); one or more pieces of TPC information used for determining SRS power control adjustment state information and channel power control adjustment state information; the at least one piece of TPC information is used for determining SRS power control adjustment state information; and the at least one piece of information is used for indicating a power control adjustment state index corresponding to the TPC information. According to the technical scheme of the invention, the SRS power control adjustment state information required when the sounding reference signal is sent to the TRP (or the antenna panel) can be independently determined according to different TRP (or different antenna panels).

The invention relates to a bridge road section monitoring early warning and prevention and control system, and belongs to the technical field of traffic safety. The system comprises a data acquisition end, a data processing end, a first dual-channel power supply module and a second dual-channel power supply module, the data acquisition end comprises an image processing device, a sensor, a video sensing device and an unvarnished transmission data sending device; the data processing end comprises a core control unit, an early warning screen controller, a bridge abnormal state early warning screen and a transparent transmission data receiving device; according to the invention, real-time monitoring of the health state of the bridge in the bridge section can be realized, the method is suitable for in-service highway bridges, the traffic safety capability of the bridge section under severe weather conditions is improved, the defects of traditional bridge monitoring are overcome, and monitoring blind spots of the highway bridges are eliminated.

The invention discloses an acoustic equal-proportion power divider based on a planar five-cavity coupling configuration and a working method, and belongs to the technical field of acoustic functional device design. Comprising a first rectangular cavity, a second rectangular cavity, a third rectangular cavity, a fourth rectangular cavity and a fifth rectangular cavity which are arranged in parallel at equal intervals, every two adjacent rectangular cavities are communicated through an air slit, and the air slit between the first rectangular cavity and the second rectangular cavity is the same as the air slit between the fourth rectangular cavity and the fifth rectangular cavity; an air slit between the rectangular cavity II and the rectangular cavity III is the same as an air slit between the rectangular cavity III and the rectangular cavity IV; the length of the air slit changes in the horizontal direction. According to the invention, the technical bottleneck of narrow frequency band of a traditional resonance type device is broken through, the technical problem of multi-channel power equalization under a non-resonance condition is solved, and a passive power distribution solution which is high in reliability and easy to integrate is provided for application scenes such as an array type loudspeaker system and a multi-channel acoustic sensing network.

The utility model discloses a photodiode dark current testing device, comprising an LED lamp, a light shield, a dual-channel power supply, a desk type universal meter, a one-chip microcomputer control board and a multi-channel test board, the light shield is covered on the multi-channel test board, the multi-channel test board is provided with PD sockets having the same number as the channels of the multi-channel test board, and the PD sockets are connected with the desk type universal meter. The PD socket is composed of a 4P socket and Y-shaped sockets arranged side by side. After the scheme is adopted, the efficiency is greatly improved through multi-channel testing, and the vertical pins can be automatically tested through the design of the Y-shaped socket.

The invention relates to the technical field of optical communication, in particular to an optical communication channel power dynamic balancing method. Local power is monitored in real time at each relay node, channel paths with different transmission losses are selected through optical switch routing decision, in optical transmission between adjacent nodes, the power attenuation amplitude of a high-power input signal after being transmitted in a high-loss path is large, and the power attenuation amplitude of a low-power input signal after being transmitted in a low-loss path is small. After the signals are transmitted for a certain distance, the power difference of the signals is reduced, and the signals are amplified by the multi-core optical fiber amplifier of the next node, so that the power dynamic balanced transmission of the channels is realized; not only is the power balanced transmission of the channel realized, but also the system energy consumption is effectively reduced, and the transmission energy efficiency is improved.

The invention belongs to the technical field of terahertz communication physical layer security, and particularly relates to a terahertz physical layer key generation method based on leaky-wave antenna space-spectrum coupling characteristics. According to the invention, the sensitivity of the effective antenna gain of the leaky-wave antenna to the frequency and the spatial propagation direction is utilized to make up for the defect of low eavesdropping channel doubtful degree caused by lack of small-scale fading in terahertz communication, and the conditional generative adversarial network is designed to accurately speculate the equivalent channel power gain. A physical layer key is generated based on the estimated channel power gain. According to the method, the channel power gain can be accurately estimated from the received signal strength with noise and auxiliary information, the reciprocity of an equivalent channel is enhanced, and the method has a lower key mismatch rate and a higher key generation rate; under the condition of different signal-to-noise ratios, good key generation performance can be kept.

The invention discloses a satellite-borne high-integration emission phased-array antenna, which is characterized in that an antenna radiation unit array, a secondary feed network and a power supply and control circuit of a T component array are integrated in a PCB (Printed Circuit Board) sub-array, and a phase shift and attenuation control channel, a power amplifier and a primary feed network are integrated in each T component; a minimum function unit of the phased-array antenna is formed by one PCB sub-array and a T assembly array installed on the PCB sub-array, and a plurality of minimum function units are combined through a radio frequency expansion mother board, so that modular connection and signal distribution are realized, and different emission requirements are met; the minimum function unit, the radio frequency expansion mother board and the thermal control board are longitudinally arranged in a vertical stacking mode, the wave control power supply module, the up-conversion amplification module and the vertical stacking module group are transversely arranged in the same plane, and a heat conduction path is greatly shortened. According to the invention, the longitudinal profile height, the overall size and the system weight of a traditional brick type phased-array antenna are obviously reduced, and the antenna can better meet the application requirements of a low earth orbit flat plate type satellite platform.

The invention discloses a precoding method and device, electronic equipment, a storage medium and a program, and the method comprises the steps: obtaining communication configuration information, and determining the space angles of different users at a satellite side according to the communication configuration information; determining a target interference user of each user based on a space angle threshold and each space angle; determining the average channel power of each user according to the communication configuration information; determining a downlink precoding vector of each user based on the target interference user, the space angle and the average channel power of each user according to an average signal-to-leakage ratio maximization criterion; and weighting the transmitting signal of each user based on each downlink precoding vector to obtain the transmitting signal of each beam. The embodiments of the present invention can reduce beam interference among multiple users, improve spectrum resource multiplexing efficiency, and reduce channel feedback overhead.

The invention relates to a circuit for realizing multi-path power supply output under-voltage fault indication, and belongs to the field of power supply converters. The invention provides a circuit for realizing multi-path power supply output undervoltage fault indication. The circuit comprises voltage-regulator tubes D2 and D3, resistors R2, R3, R4, R5 and R6, photoelectric couplers U1 and U3, MOS (Metal Oxide Semiconductor) tubes U2 and U4, an indication lamp D1 and a 3.3 V power supply V3. According to the circuit, under-voltage fault monitoring can be carried out on the output voltage of multiple paths of power supplies, the circuit is not limited to whether the outputs of the paths are in common ground or not, the under-voltage threshold value of the output voltage can be set by adjusting the voltage stabilizing value of the voltage stabilizing tube, and when any path is under-voltage, the fault indicating lamp can be triggered to work. Every time one path of output voltage detection is added, a primary optocoupler is connected in series in a detection main loop.

A frequency source automatic test system disclosed by the present invention comprises a frequency spectrograph test main body, the lower part of the rear surface of the frequency spectrograph test main body is provided with a sealing frame, the rear side of the sealing frame is provided with a second magnet, a sealing cover and an annular sealing groove, and the second magnet is located at the inner side of the annular sealing groove. A waterproof sealing ring and a first magnet are arranged on one side of the sealing cover, the first magnet corresponds to the second magnet, the first magnet is located on the inner side of the waterproof sealing ring, and the waterproof sealing ring is matched with the annular sealing groove. The frequency source automatic test system can measure various characteristic parameters of radio frequency signals, including frequency, frequency selection power, bandwidth, adjacent channel power, modulation waveform, field intensity and the like. Therefore, the frequency spectrograph has higher flexibility and accuracy when processing complex signals; and the center frequency of the signal can be accurately measured, which is very important for the design and debugging of a wireless communication system.

The utility model provides a kind of parallel ageing test device of ac-dc signal acquisition terminal, and the device core is in the ageing test technical field of acquisition terminal, and the efficiency, reliability and economy of ageing test are significantly improved by multi-channel power input and intelligent switching mechanism;It adopts multi-channel ac and dc power input design, and the input voltage state is accurately monitored by means of opto-coupler isolation chip, and the relay is intelligently controlled by microcontroller according to the collected data, to realize the flexible switching of ac and dc power supply, effectively avoid the interference of input abnormality on test process, and enhance the stability and adaptability of test. It aims at solving the problems of low reliability of single voltage input, low test efficiency, high cost and inability to realize multi-channel voltage independent adjustment in the prior art.

The invention provides a multi-channel power supply system in a self-sustaining energy type underwater closed cabin. The multi-channel power supply system comprises a self-sustaining battery, a power supply control board, an integrated communication circuit, a multi-channel output load circuit, a power supply system external trigger on-off controller and a power supply system external communication interface, the self-sustaining battery is connected with the power supply control board through the onboard rectangular connector; the power supply control board comprises an input connector, a filter circuit, an integrated circuit wall-attached heat conduction shell and an output interface; the integrated communication circuit is arranged on the power supply control board, is connected with an external communication interface of a power supply system and is used for receiving an external trigger instruction and sending internal state information; the power supply system external trigger on-off controller is connected with the integrated communication circuit so as to control on-off of the power supply system based on an external trigger signal; the multi-channel output load circuit comprises a plurality of output channels, each output channel comprises a relay, and the relays are connected with the integrated communication circuit so as to control output on-off based on the internal state information and the external state information.

The embodiment of the utility model discloses a generator set power transmitter optimization circuit. In one specific embodiment, the circuit comprises a generator set, a first power transmitter, a second power transmitter, a third power transmitter, a standby power transmitter, a fourth contactor, an eighth contactor and a control module. According to the acquisition circuit of the multiple power transmitters provided by the embodiment of the invention, multi-channel power data monitoring is realized, and stable operation of a generator set is prevented from being influenced when a single power transmitter fails; meanwhile, the utility model also provides a circuit in which the standby power transmitter is put into use, so that the standby power transmitter can be put into use or stopped from being put into use optionally in any required state (such as a fault of a certain power transmitter), and the reliability of power data acquisition is further improved.

An apparatus includes a plurality of memory channels to a memory. The plurality of memory channels include a first slice and at least a second slice that is distinct from the first slice. The apparatus further includes power control circuitry coupled to the plurality of memory channels. The power control circuitry is configured to adjust, in accordance with a power collapse trigger condition associated with the first slice, operation of the first slice from a first mode of operation to a second mode of operation independently of the second slice. The first mode of operation is associated with a first power consumption level that is greater than a second power consumption level associated with the second mode of operation.

The utility model relates to the technical field of analyzers, and discloses a multi-channel power analyzer, which comprises a bottom plate and a box body, a dismounting mechanism is fixedly arranged on the side surface of the box body, and a heat dissipation mechanism is arranged in the box body; the dismounting mechanism comprises a mounting box, and a connecting plate is fixedly mounted on the inner wall of the mounting box. When the interior of the analyzer needs to be overhauled and maintained after the analyzer is used for a long time, a pressing block is pressed to drive an ejector rod to move downwards, at the moment, the ejector rod pushes a slope arranged on the side face of a clamping block to move and compresses a second reset spring, and when the clamping block is separated from a bayonet formed in the side face of a cover plate, the cover plate can be separated from a box body by pulling a handle. The interior of the box body is overhauled and maintained, after overhauling is completed, a cover plate makes extrusion contact with a clamping block through a handle, a second reset spring resets to push the clamping block to enter a clamping opening, fixing of the cover plate is completed, the overhauling and maintaining speed and efficiency of the device can be improved to a great extent, practicability is improved, and the labor intensity of workers can be relieved.

The invention discloses an active intelligent lock system and a control method thereof, and belongs to Internet of Things safety equipment. The active intelligent lock system is provided with an environment energy collection module, a dual-channel power management module, a dynamic power consumption controller, a multi-mode authentication module, an authorization authentication module, a communication module and a master control MCU (Microprogrammed Control Unit), the environment energy collection module and the dual-channel power management module can improve the power supply endurance of the active intelligent lock system and the safety emergency processing of power supply faults, and the dynamic power consumption controller can provide three different power consumption modes to optimize the dynamic energy consumption in multiple use scenes, so that the utilization rate of electric energy is improved; the multi-mode authentication module and the authorization authentication module provide a multi-person combined unlocking mechanism, the industrial-grade centralized supervision requirement and intelligent management are met, and the use safety and operation convenience of the active intelligent lock system are effectively improved.

This invention discloses a method for automatically calculating the two-channel switching time of a power supply panel. During the testing process, a control command is used to enable an oscilloscope to accurately sample data points. Based on the voltage amplitude and frequency of the preceding and following AC waveforms and the standard formula for a sine wave, the trend of the changing sine wave is predicted. The predicted trend waveform points are compared with the corresponding points sampled by the oscilloscope, and the moments of abrupt changes in the waveform are identified. The time difference between these two moments is the two-channel power supply switching time. This invention can reliably and quickly detect the two-channel switching of a power supply panel, reducing the risk of defective products entering the customer's possession.

1. The name of the design product: circuit board (DCDC multi-channel power module). 2. The use of the design product: mainly used for circuit board. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.