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86 results about "Single loop" patented technology

Valve fault diagnosis method and system based on machine learning model and mechanism model

The invention relates to a valve fault diagnosis method and system based on a machine learning model and a mechanism model. The method comprises the steps that working condition classification marking is conducted on operation data of a valve through an ARX model; when the operation data under the same working condition is single-loop operation data, flow prediction is carried out in a machine learning model, deviation calculation is carried out on a generated flow prediction value and an actual flow value, and a flow deviation value under the current working condition is obtained; when the operation data under the same working condition is multi-loop operation data, analyzing the flow characteristics of the operation data by using the mechanism model, and performing deviation calculation on the obtained flow characteristic value and the flow characteristic reference value to obtain a flow characteristic deviation value under the current working condition; all the flow deviation values or the flow characteristic deviation values are traversed to be compared with a deviation value threshold value, and the fault type of the valve is determined according to a comparison result. According to the method, the accuracy, the real-time performance and the universality of valve fault detection in the process industry are improved.
Owner:SUPCON TECH CO LTD

Modular, extensible, interoperable autonomy systems and methods

The subject matter described herein discloses apparatus, systems, techniques, and articles for an MEIA (Modular, Extensible, Interoperable Autonomy) architecture that enables a vehicle or autonomous agent with minimal human guidance to perform solo and collaborative missions with other vehicles. The MEIA architecture includes four layers—Awareness, Strategy, Tactics, and Execution. The Execution Layer bookends a single loop through the layers by observing and acting. The Awareness Layer orients, and the Strategy Layer and Tactics Layer split the responsibility of deciding.
Owner:GENERAL DYNAMICS MISSION SYSTEMS INC

Submerged chain conveyor system based on multi-loop automatic water replenishing control

PendingCN120447663ASimultaneous control of multiple variablesMulti loop controlLoop control
The invention relates to the technical field of equipment control data processing, in particular to a submerged chain conveyor system based on multi-loop automatic water replenishing control, which comprises a data acquisition module, a water level analysis module, a water replenishing strategy generation module, a multi-loop control module, a water replenishing execution module, a dynamic adjustment module, an exception handling module and a communication coordination module. The data acquisition module synchronously acquires liquid level, temperature and viscosity data through a multi-mode sensor group, and the data are normalized and denoised by the data fusion unit and then transmitted to the water level analysis module; the water level analysis module adopts an ARIMA time sequence prediction model to generate a water level dynamic trend, and outputs a water replenishing demand level through comparison in combination with a viscosity threshold value; the water replenishing strategy generation module calls the rule base to generate a multi-loop water replenishing strategy, the problems of blockage and environmental protection risks caused by the fact that traditional single-loop control cannot cooperatively regulate and control water quality parameters in a multivariable coupling environment are solved, the water replenishing response precision and the system stability are improved, generation of pipeline hardening substances is restrained, and the equipment shutdown frequency is reduced.
Owner:YANTAI POWER PLANT OF HUANENG SHANDONG POWER GENERATION CO LTD

Automatic path planning method and device for overhead collector lines

The present invention discloses a method and device for automatically planning the path of an overhead collector line, which belongs to the technical field of photovoltaic power generation. The method is as follows: determining a box transformer connection path that meets the first goal in a single-circuit tower mode; in the box transformer connection path that meets the first goal, using a serpentine exploratory path correction strategy to correct it, and then using a multi-circuit tower optimization strategy to optimize it to obtain a box transformer connection path that meets the second goal; selecting the box transformer connection path with the lowest cost among the box transformer connection paths that meet the second goal. The box transformer connection path with the lowest theoretical cost is directly obtained based on the three-dimensional coordinates, and then corrected using a serpentine exploratory path correction strategy to make it closer to the actual situation and more accurate. A hierarchical multi-circuit tower optimization method is used, which makes the calculation faster and more efficient and the result better, that is, the planned path is the shortest and the cost is the lowest.
Owner:HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD

Single-loop droop control method and system of wind generating set

The invention discloses a single-loop droop control method and system for a wind generating set, and the method comprises the following steps: constructing a doubly-fed fan-power converter-power grid three-module coupling model, and completing the dynamic adaptation of the characteristics of a doubly-fed fan of a single-loop droop control architecture without inner-loop current control; based on the input signal-model collaborative integration body and the adaptive architecture, MIMO-GBC is adopted to analyze a phase margin and a resonance peak value of an open-loop transfer function matrix eigenvalue of a dynamic small signal model, and double risks are identified in a full slip rate interval; aiming at the resonance risk, a current induction type virtual impedance strategy is adopted; aiming at insufficient phase margin, adopting a transient phase calibration strategy; and according to the real-time slip ratio of the DFIG and the stator power change, inter-partition linkage optimization is carried out on the virtual resistance and the phase calibration angle so as to minimize a dual-power step response fluctuation square mean value, a parameter setting period and a rotor side converter control period are synchronously matched, and all-working-condition stable control is realized.
Owner:CHINA UNIV OF MINING & TECH

Target power control scheme

Various embodiments include systems and methods for controlling power in a computing device based on a number of frames per second (FPS) displayed on the computing device. A computing device may use a combination of power control and FPS control in a cascaded PID loop to enhance stability and / or performance of the device or software application. The cascaded PID loop may include a plurality of PID controllers that are hierarchically organized such that the output of one PID controller is used as the input (or setpoint) of a subsequent PID controller. This cascade configuration may improve control or performance by reducing variability, enhancing response to interference, and enabling more conservative tuning of external loops compared to a single loop control system.
Owner:QUALCOMM INC

Anti-alternating magnetic field interference circuit of voltage sampling loop and standard electric energy meter thereof

The utility model relates to the technical field of standard electric energy meters, in particular to an anti-alternating magnetic field interference circuit of a voltage sampling loop and a standard electric energy meter thereof, the circuit comprises an input end and an output end, the positive electrode of the input end is signal input, the positive electrode of the output end is signal output, and the negative electrodes of the input end and the output end are grounded; n is a positive integer larger than or equal to 2, the 2N plug-in resistors are symmetrically arranged and connected to the target circuit board, the first plug-in resistor is connected with the other side of the input end, the 2Nth plug-in resistor is connected with the other side of the output end, the 2N plug-in resistors are connected through cross routing, 2M loops are formed, and M is a positive integer. Therefore, the problems that although the area of a loop is reduced as much as possible in an existing standard electric energy meter voltage sampling loop layout, a certain single loop area still exists, induced voltage is generated in a circuit, and the accuracy of voltage sampling is affected are solved.
Owner:HENAN XJ INSTR +1

Method for improving shielding lightning protection performance of line in single-loop alternating-current to direct-current scene

The invention relates to the technical field of lightning protection of high-voltage transmission lines, in particular to a method for improving shielding failure lightning protection performance of a line in a single-loop alternating-current to direct-current scene, which comprises the following steps of: configuring positive and negative leads and a return line of a direct-current line by utilizing three lead channels of an original alternating-current line tower, the configuration of the positive and negative wires and the return wire of the DC line comprises the following steps: determining three candidate arrangement modes of the wires: the return wire is located in a tower window, the positive wire is located in the tower window, and the negative wire is located in the tower window; based on the statistical characteristic that 90% of thunder and lightning is negative polarity, shielding failure flashover rates of the direct-current line in the three candidate arrangement modes are calculated by combining shielding failure differences of positive and negative thunder and lightning on the direct-current line; according to the shielding failure flashover rate, the arrangement mode with the lowest shielding failure flashover frequency is screened to serve as the shielding failure lightning prevention optimal wire arrangement scheme in the single-loop alternating-to-direct scene, and the excellent shielding failure lightning prevention effect can be achieved under the condition that an existing iron tower structure does not need to be changed.
Owner:STATE GRID JIANGSU ECONOMIC RES INST

A multi-channel loop heat pipe and radiator

The application discloses a kind of multi-channel loop heat pipe and radiator, comprising: heat pipe body and heat pipe cover, heat pipe cover is set in the open side of heat pipe body cavity;Heat pipe body has evaporation cavity and multiple condensation cavities, multiple condensation cavities are evenly distributed in the outer circumferential side of evaporation cavity, each condensation cavity is communicated with evaporation cavity by corresponding steam passage and liquid passage, to form multiple circulation heat dissipation structure, each condensation cavity and each liquid passage are provided with liquid storage cavity between.The application adopts new type loop heat pipe of multiple condensation cavities sharing an evaporation cavity, not only compact overall structure, small space occupation, and, compared with single loop, heat dissipation effect can be increased by 3-4 times, greatly improve heat dissipation capacity;And can adapt to different orientation in gravitational field and acceleration field, can be applied in high-power computing power module heat dissipation and aerospace field heat dissipation.
Owner:NO 15 INST OF CHINA ELECTRONICS TECH GRP

Hot stamping forming device and method for large aluminum alloy thin-wall part

The invention provides a hot stamping forming device and method for a large aluminum alloy thin-wall part. The device comprises a hot stamping die, a single-loop cooling unit and a control system. An integrally-machined variable cross-section cooling flow channel is embedded in the hot stamping die, and the flow channel is composed of a high-speed flow channel area, a low-speed flow channel area and a transition flow channel area which are different in hydraulic diameter. The single-loop cooling unit provides a cooling medium for the flow channel through a single variable-frequency hydraulic pump; and the control system is used for roughly adjusting the overall cooling strength by adjusting the pump power. Passive distribution of the flow velocity of a cooling medium is achieved through geometric differences of flow channel sections, a complex multi-loop active control system can be replaced with a single-loop system only, soft and hard gradient performance distribution is achieved on a formed part, and the system has the advantages of being simple in structure, high in reliability and low in energy consumption and maintenance cost.
Owner:BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD +1

Method for predicting steady-state temperature of three-phase multi-circuit tunnel cable core, and electronic device

The present invention relates to a method for predicting the steady-state temperature of a three-phase multi-circuit tunnel cable core, and an electronic device. The method comprises: establishing a single-phase single-circuit tunnel cable steady-state thermal circuit model, and using the constructed single-phase single-circuit tunnel cable steady-state thermal circuit model to obtain the steady-state temperature of a core of a single-phase single-circuit cable; using a correction method to obtain the steady-state temperature of a cable core arranged in a three-phase single circuit; for a single-phase four-circuit arrangement situation, incorporating the influence of a mutual thermal effect between circuit cables on the temperature of the cable core into equivalent mutual-heating thermal resistance, and introducing the equivalent mutual-heating thermal resistance into the single-phase single-circuit tunnel cable steady-state thermal circuit model, so as to form an improved thermal circuit model to predict the steady-state temperature of a cable core of a single-phase multi-circuit cable; and using a three-phase multi-circuit cable as the combination of single-phase single-circuit, three-phase single-circuit and single-phase multi-circuit, and predicting the temperature of a cable core of the three-phase multi-circuit cable. Compared with the prior art, the present invention has advantages such as quickly and accurately predicting the steady-state temperature of a three-phase multi-circuit tunnel cable core.
Owner:STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

High-efficiency material conversion device and method for multi-head driving heat removal

The invention relates to the technical field of petrochemical engineering, in particular to an efficient material conversion device and method for multi-head driving heat removal. The technical problems are as follows: the problem of uneven temperature distribution caused by volume increase of a reactor in the prior art is solved; according to the technical scheme, the efficient material conversion device and method achieving multi-head driving heat transfer comprise a material conversion unit, a multi-head driving heat transfer unit and a heat recovery unit, the multi-head driving heat transfer unit comprises at least two sets of independent circulation loops, and each set of loop corresponds to a heat transfer subarea of the material conversion unit; the reactor is divided into a plurality of independent temperature control areas through the multi-head driving heat transfer unit, and the accurate matching of the heat transfer intensity of each area is realized in combination with the dynamic regulation and control of the temperature sensor array and the central controller, so that the technical defect that the traditional single-loop heat transfer system cannot adapt to the dynamic change of the heat load is overcome, and the heat transfer efficiency is improved. The temperature distribution uniformity of the material conversion equipment is improved, the side reaction occurrence rate is reduced, and continuous and stable operation of the device is guaranteed.
Owner:HUA WEI CHEM & BIOLOGIC ENG CO LTD

A split-type control circuit for aviation obstruction lights

This utility model discloses a split-type control circuit for aviation obstruction lights, belonging to the field of control circuit technology. The control loop can select parameters according to the power of the light fixture. The control circuit includes an AC power supply, a light fixture power switch QF1 and a control power switch QF2, a cyclic time relay KA, and solid-state contactors KM1 and KM2. Through the split-type control design, the flexibility and applicability of aviation obstruction lights are significantly improved. After separating the light fixture from the control loop, the selection of light fixtures is no longer limited by the control circuit. LED lights of different power and colors can be selected according to actual needs, breaking through the limitation of traditional aviation lights with a power of no more than 50W. It can also flexibly adjust the flashing frequency by replacing components, solving the problems of fixed flashing and susceptibility to weather interference in traditional equipment. Through the multi-loop time-sharing control design, the system redundancy is effectively improved. Even if a single loop fails, other loops can still operate normally, making it suitable for scenarios with extremely high safety requirements, such as airports and high towers.
Owner:HEBEI XINHAI CHEM GRP CO LTD

Single circuit landscape pole

ActiveCN115992616BSolve the problem of large pulling rangebig investmentTowerMechanical engineering
This invention discloses a single-loop landscape tower, comprising a tower body, a first ground wire suspension point, a second ground wire suspension point, a first conductor suspension point, a second conductor suspension point, and a third conductor suspension point. The tower body is arch-shaped and includes a first main pole, a second main pole, a first crossarm, a second crossarm, a third crossarm, a fourth crossarm, and a fifth crossarm. The first main pole includes a first segment and a second segment connected sequentially in a vertical direction. The second main pole includes a third segment and a fourth segment connected sequentially in a vertical direction. The fifth crossarm is located between the first and third segments, with its two ends connected to the first and third segments respectively. The first and third crossarms are both located on the side of the first segment away from the third segment and are spaced apart sequentially in a vertical direction. The second and fourth crossarms are located on the side of the third segment away from the first segment and are spaced apart sequentially in a vertical direction. This single-loop landscape tower has advantages such as a novel and unique appearance and reduced investment costs.
Owner:STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD

Control method, device and equipment of double-loop emergency steering system and storage medium

The invention discloses a control method, device and equipment of a double-loop emergency steering system and a storage medium. The method comprises the steps that the running speed of the vehicle and the first oil supply flow of the emergency steering system are obtained, and the first oil supply flow is provided by a main oil pump in the emergency steering system; under the condition that the running speed is larger than the preset speed and the first oil supply flow is smaller than the preset flow, a target control signal is generated based on an emergency valve of the emergency steering system; based on the target control signal, an emergency oil pump in the emergency steering system is controlled to provide second oil supply flow, so that the sum of the first oil supply flow and the second oil supply flow is not smaller than the preset flow; and vehicle steering is controlled based on the first oil supply flow and the second oil supply flow. The problem that when an engine or a power steering oil pump of an existing single-loop steering system breaks down, a power steering gear loses a power source, and driving safety is seriously affected is solved, double-loop emergency steering control is achieved, and the driving safety is improved.
Owner:FAW JIEFANG AUTOMOTIVE CO

Anti-false-alarm water level control system based on dual-redundancy liquid level detection

The invention relates to the field of liquid level instruments, in particular to an anti-false-alarm water level control system based on dual-redundancy liquid level detection, and aims to solve the problems of false alarm and missing alarm risks, single-point failure hidden dangers, unreliable interlocking control and the like due to the fact that traditional water level monitoring adopts a single-loop system. A dual-redundancy detection mechanism formed by the heterogeneous liquidometers is adopted, interactive verification and quantitative evaluation of a redundancy signal processing module are combined, the reliability of water level control is remarkably improved, the false alarm risk is effectively reduced, data acquisition is conducted through the heterogeneous liquidometers with different principles and different installation positions, common cause faults are fundamentally avoided, and the reliability of water level control is improved. The method has the advantages that the accuracy and the representativeness of the final liquid level data are ensured by performing reasonable judgment and interactive verification on feedback signals and intelligently identifying invalid or wrong data, and finally risk assessment is performed based on the accurate final liquid level data, so that common false alarm conditions in the system are greatly reduced.
Owner:BENGANG STEEL PLATES CO LTD

Single-cycle gilbert-johnson-keerthi algorithm

In some examples, a graphics processing method for processing electronic data for display on a display screen is provided, the method comprising: evaluating distances between objects of a display scene to be rendered and displayed on the display screen using an aligned and vectorized data structure in a Gilbert-Johnson-Keerthi algorithm running on a single instruction multiple data (SIMD) processor, the structure comprising a separating axis, a position and a rotation of a local coordinate system, and a position of each point in a convex hull; implementing the Gilbert-Johnson-Keerthi algorithm using only a support function and a single loop, wherein the support function comprises loop-free and branch-free functions to support a mapping function, and the single loop repeats the algorithm until an optimal point of a shortest distance between two objects is identified.
Owner:HUAWEI CLOUD COMPUTING TECHNOLOGIES CO LTD

FSBB super capacitor energy storage method based on feedforward-single loop control

The invention discloses an FSBB super capacitor energy storage method based on feedforward-single loop control, and relates to the field of energy storage systems. According to the invention, the feed-forward channel is added in the control process, so that the dynamic response speed when the input and output voltage of the system changes in a wide voltage range is improved, the sensitivity of the system to parameters is reduced, and the harmful phenomena such as circulation and the like caused by untimely response or incapability of accurately reaching a set value are prevented; therefore, the lithium battery and the super capacitor are damaged. The voltage and current of the lithium battery and the voltage and current of the supercapacitor bank are detected through real-time sampling, the working power of the lithium battery and the working power of the supercapacitor bank are calculated, corresponding power closed-loop control is carried out, the problems of charging and discharging over-current and over-voltage of the lithium battery and the supercapacitor are effectively avoided, and the stability of the system is improved.
Owner:XI AN JIAOTONG UNIV

Single-loop PI advanced control method and system of island inverter

The invention discloses a single-loop PI advanced control method and system for an island inverter, and the method comprises the steps: constructing an island inverter control model, carrying out the Laplace transformation of the inverter control model, and forming an output capacitor voltage loop transfer function; pI control is added to the open-loop transfer function of the output capacitor voltage loop transfer function, and PI control parameters are determined by loop setting; adding a lead compensator in front of the open-loop transfer function, and setting compensator parameters according to a specified phase angle margin; on the basis that a lead compensator control loop is added, inductive current feedback gain is added to input voltage so as to improve the response characteristic of the output capacitor voltage of the lead compensator control loop. According to the invention, the problem of balancing the stability-bandwidth of the island inverter can be solved.
Owner:SOUTHEAST UNIV

Asynchronous parallel quantum chip automatic calibration software design method and system

The application provides an asynchronous parallel quantum chip automatic calibration software design method and system, comprising: a quantum chip calibration scheduler; two task queues are set in the scheduler: a ready task queue and a waiting task queue; when the tasks in the waiting task queue meet the conditions that can be executed, the tasks are added to the ready task queue; the scheduler schedules the tasks in the two queues in a non-blocking manner; the task is defined as a single loop scanning process of the quantum chip calibration process; for different parameter calibration of a single quantum bit in the quantum chip, the calibration process without a predecessor node in the directed acyclic graph is added to the ready task queue, and the calibration tasks of the remaining nodes are put into the waiting task queue; for calibration of a parameter of multiple quantum bits in the quantum chip, the scanning values of each quantum bit need to be calculated separately; for calibration of different parameters of multiple quantum bits in the quantum chip, the calibration strategy is customized according to the structure of the quantum chip.
Owner:EAST CHINA INST OF COMPUTING TECH

Redundant power supply system and control method

The invention discloses a redundant power supply system and a control method in the field of vehicle electrical systems, and aims to solve the problem of power shortage of a safety load after a platform power supply system breaks down. The system comprises a main storage battery which is communicated with a safety load through a first power supply loop; the backup storage battery is communicated with the safety load through a third power supply loop; the DCDC converter is respectively communicated with the first power supply loop and the third power supply loop through the second power supply loop; the control unit is used for acquiring the operation state of each component and each power supply loop; the isolating switch circuit is used for respectively controlling the on-off of each power supply loop; the triple power supplies cooperate with each other and are combined with the design of a special power supply loop, so that continuous power supply of a safety load (such as a braking / steering ECU) can still be ensured when any single power supply or single loop fails, and the hidden danger of power shortage of the safety load after the failure of the traditional scheme is thoroughly solved; the isolation switch circuit reduces the influence of power failure of other parts on the safety load.
Owner:JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD

Wide voltage input and wide voltage output LLC direct current power supply control method and device

The invention relates to the technical field of LLC direct-current power supplies, and discloses a wide-voltage-input and wide-voltage-output LLC direct-current power supply control method and device. The method comprises the following steps: carrying out per-unit processing on a frequency modulation and phase shift control loop and a control quantity, and adjusting the gain trends of the two to be monotonous in the same direction; frequency modulation and phase shift control are combined into a single loop, and a PI controller is shared to output control quantity; and judging a frequency modulation value and a phase shift value based on the output quantity section by section to realize smooth switching. Specifically, the frequency modulation range per unit is 1.0-2.0 (the corresponding period T is increased progressively), and the phase shift range per unit is 0.0-1.0 (the gain is increased progressively after negation adjustment); after merging, the control quantity range is 0.0-2.0, the 0.0-1.0 section is phase shift control (P = 2.0-m), and the 1.0-2.0 section is frequency modulation control (T = m); the device adopts a full-bridge LLC topology, and the output side is connected in series with a diode rectifier bridge and a resonant transformer to expand the voltage range; according to the invention, seamless connection of frequency modulation and phase shift is realized through a unified control loop, switching oscillation is avoided, wide input and wide output requirements are met, and the stability and efficiency of the system are improved.
Owner:NEW SCENERY (QINGDAO) TRANSPORTATION TECH CO LTD

Single-loop two-translation parallel mechanism with closed-loop position solution

The present invention relates to the fields of mechanism and robotics technology, and in particular to a single-loop two-translation parallel mechanism with a closed position solution, comprising a simple branch chain 1, a simple branch chain 2, a moving platform and a static platform. The simple branch chain 1 is composed of a rotating pair 1, a rotating pair 2 and a rotating pair 3 whose axes are parallel to each other, which are connected in series in sequence; the simple branch chain 2 is composed of a moving pair 2, a rotating pair group 1 and a rotating pair group 2, which are connected in series in sequence; the moving platform is respectively connected to the rotating pair 3 and the rotating pair in the rotating pair group 2 that is away from the rotating pair group 1, and the static platform is respectively connected to the rotating pair 1 and the moving pair 2. The moving platform of the present invention can generate two translation movements; when the driving pair of the simple branch chain 1 or the simple branch chain 2 is locked, the parallel mechanism is a two-translation parallel mechanism with one degree of freedom, and one translation is a non-independent derivative movement. In both cases, the mechanism coupling degree is zero, and both have a closed position positive solution.
Owner:CHANGZHOU UNIV

A lightning wire support for distribution network overhead single circuit line

The utility model relates to the field of lightning conductor support, especially lightning conductor support for distribution network overhead single loop line, lightning conductor pole top support is divided into middle end support and terminal support, which are installed on the stand, U type hanging ring is installed on the middle end support and terminal support, and the bottom of U type hanging ring is installed with overhang wire clamp; the pole top support in the terminal support is inserted with aluminium clad steel strand, the overhang wire clamp is inserted with drainage strand, and the aluminium clad steel strand and drainage strand are connected through parallel groove clamp. In the utility model, through the setting of terminal support and middle end support, the multiple drainage strands and aluminium clad steel strands can be connected together through parallel groove clamp, and the drainage strands are connected and installed together with grounding round steel through grounding wire terminal, so that the grounding wire installation of aluminium clad steel strand can be realized, and the installation mode is simple and convenient, which is convenient for user operation.
Owner:FUJIAN SHANKE INTELLIGENT TECHNOLOGY CO LTD

Lightning protection device for a single circuit straight tower

The utility model discloses a lightning stroke protection device of single loop straight line tower relates to power equipment protection technical field. This lightning stroke protection device of single loop straight line tower, including base, the top of base is fixedly connected with lightning arrester, the top of base is fixedly connected with installation subassembly and reinforcing component, through setting up the installation subassembly who constitutes by fixed plate, insert block, spring and fixed block, when installing lightning arrester, only need to press first handle and drive insert block to contract, after loosening handle with connecting piece clamping groove aiming at insert block, spring pushes fixed block and drives insert block to be inserted into clamping groove, and spring continues to provide the thrust and makes insert block and clamping groove keep the close clamping state of joint, avoids the loosening of lightning arrester in the lightning process due to vibration, can complete the fixed connection of lightning arrester and base fast, when disassembling, can separate also by pressing handle, reduces installation maintenance time cost, prolongs the service life of lightning arrester, improves installation efficiency, is convenient for lightning arrester overhaul or replacement.
Owner:ZHONG QING SHI JIANG JIN DIAN LI XIAN LU GOU JIAN CHANG

Hearth negative pressure dynamic compensation control method and device, electronic equipment and storage medium

The invention discloses a hearth negative pressure dynamic compensation control method and device, electronic equipment and a storage medium, relates to the technical field of equipment control, and aims to dynamically adjust the proportion and integral coefficient of an induced draft fan regulator in combination with hearth pressure deviation and change rate thereof so as to avoid the limitation that fixed PID parameters are difficult to adapt to dynamic working conditions; in addition, an enhanced feed-forward signal containing an air feeder public instruction and a pressure change rate feed-forward item can be generated, a coupling compensation mechanism under the dynamic working condition is supplemented, meanwhile, the dynamic upper and lower limits of a frequency conversion instruction are calculated according to the load for boundary constraint, and pressure fluctuation caused by instruction abnormity is prevented. The technical problems that combustion instability is caused by hearth pressure fluctuation and improvement of boiler operation efficiency is restricted due to the fact that existing single-loop control adopts fixed PID parameters and a single feedforward signal and lacks a dynamic coupling compensation mechanism can be solved. The technical effects of stabilizing the hearth negative pressure, avoiding combustion instability, improving the boiler operation efficiency and enhancing the hearth pressure control adaptability under the dynamic working condition are achieved.
Owner:INNER MONGOLIA HUANENG THERMOELECTRIC CO LTD WUHAI POWER PLANT

Single-loop lighting control method, circuit and lighting equipment

The invention relates to the technical field of lighting, in particular to a single-loop lighting control method and circuit and lighting equipment. The single-loop lighting control method comprises the following steps: acquiring an input control signal, performing frequency modulation digital coding processing on the input control signal to generate a modulation control signal, and outputting a PWM (Pulse Width Modulation) signal corresponding to the modulation control signal; a PWM signal is adopted to drive an NMOS tube to work so as to transmit a modulation control signal and power supply electric energy to the drive circuit module; and the driving circuit module demodulates the modulation control signal transmitted by the switching action of the NMOS tube to obtain an illumination control signal, and drives the illumination module to work based on the illumination control signal. According to the application, the modulation control signal and the power supply electric energy can be transmitted to the driving circuit module in a single loop formed by connecting the control circuit module, the driving circuit module and the power supply module in series, an independent loop does not need to be additionally arranged for a complex illumination control signal for transmission, and abundant illumination functions can also be realized.
Owner:SHENZHEN LANGHENG ELECTRICAL

Energy storage system and control method thereof

The application relates to an energy storage system and a control method thereof, which comprises an energy supply system, an energy storage module and a user unit. By introducing the energy storage module, the matching of the energy supply side of the energy supply system and the demand of the user side is improved, the volume and cost of the energy supply system are reduced, the irreversible damage of the energy supply system caused by frequent start and stop is avoided, and the service life of the energy supply system is prolonged. By adopting the mode of flow distribution and energy distribution of the first energy carrying medium entering the energy storage system in a single loop, and by adopting the mode of the first energy carrying medium supplying energy for cooling the second energy carrying medium and adjusting the in-out position of the first energy carrying medium and the second energy carrying medium in the storage tank in a double loop, it is ensured that one way of the energy carrying medium can directly input the energy supply system to supply power for the user unit, so that the cold start can be quickly realized. Meanwhile, by utilizing the temperature difference and density difference of the energy carrying medium in the storage tank and the characteristics of natural convection, the temperature of the energy storage module is uniform, and the energy storage effect is good.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI