44results about How to "Reduce start and stop" patented technology

The invention relates to the field of traffic control and particularly discloses a dynamic coordinated control method for the bidirectional different requirements of a trunk road. The method comprises the following steps of (1) calculating a key intersection largest in traffic flow according to the historical data of a detection coil; (2) determining a plurality of different coordination strategies according to the different traffic requirements in the up and down directions of the key intersection, and calculating a coordinated timing plan in different coordination strategies through constructing a model; (3) finally, according to the traffic flow monitored in real time, voting and determining an optimal coordination strategy. According to the invention, the method can meet different traffic requirements in the two ways of a trunk road. By adopting the method, the traffic efficiency of the trunk road can be effectively improved, and the traffic jam of the trunk road can be relieved. Therefore, the travel time of citizens can be saved. Meanwhile, the energy consumption of vehicles can be saved, and the pollution of the traffic environment can be reduced.

The invention discloses a real-time charging optimization method for electric vehicle cluster based on clustering control, and relates to the field of real-time charging in electric vehicle cluster, which comprising the following steps of: step 1, based on a distributed layered control framework, performing a queue division on the EV cluster by taking the charging end time as a judgment amount; step 2, according to the charging characteristics of EV cluster, the queue division of EV cluster is conducted by taking the end of charging as a criterion; step 2, a real-time optimization model of charging and discharging power for EV cluster with the objective of minimizing daily load fluctuation is solved, real-time optimization of charging and discharging power of EV cluster is carried out, andsecurity constraints are checked by distribution network; step 3, on the basis of an EV cluster scheduling result, the charging and discharging costs of EV owners are considered, a power allocation model in EV cluster is solved, the optimal power allocation for charging and discharging power of a single EV in the EV cluster is obtained, so that the total output of the EV cluster is as close as possible to the scheduling result. By means of the device, EV charge and discharge distributed layered control framework is adopted, thereby realizing the real-time control of charging and discharging in EV cluster.

The method applies refrigerant mixed by two or above compositions to change circulating media concentration through a separation unit; when load is increased at heat pump operation system separates composition of high boiling point through separation unit to raise concentration of low boiling point media in circulation for enhancing ability of heating at low temperature environment; when load is decreased high boiling point composition of high concentration stored in low pressure liquid storage tank at bottom part of separation unit is absorbed systematically through heating means to decrease heat generating amount of system.

A vertical internal coating machine is taught, which may be used with bodies such as cans (2 piece, 3 piece, draw, redraw,) and including cylinders, containers and any similar body. In the machine cans or similar bodies are vertical in the machine's star wheel rather than horizontal, and the bodies are sprayed with the star wheel in continuous motion without stopping and starting. The machine teaches that a plurality of spray guns may be provided for each pocket of the star wheel. By means of the machine an improved line layout is devised which may eliminate the need to raise the bodies immediately prior to a necker by allowing the vertical can internal coating machine and internal bake over to be disposed on any level of the facility, upper, lower, mezzanine, etc. In green aspects, the machine may use negative pressure cabinets / hoods and positive pressure tunnels to entrain volatile organic chemicals emitted by the spray guns and coated bodies and may send these VOCs to a VOC desctruction device, such as an oven.

The invention discloses a lower-temperature source heat pump capacity regulating method. The invention adopts mixture contains two or more components as coolant and changes concentration of circulating working fluid in system via disconnecting means. When heat pump operating load increases, system separates high boiling component from fluid via disconnecting means to increases concentration of circulating lower boiling working fluid and increases heating efficiency under low temperature environment. When heat pump operating load decreases, system draws high boiling component of high concentration from low-pressure fluid tank at the bottom of debonding unit and so reduces the heat-production amount. When system processes cold-production step, it can also change proportion of ingredients to meet the need of load variation.

The invention discloses a heat pump unit and an anti-freezing control method thereof. The heat pump unit comprises N parallel module machines. The control method includes the following steps that the outdoor environment temperature is detected, and the water inlet temperature and the water outlet temperature of each module machine are detected; when the kth module machine is in a standby state and it is judged that the kth module machine needs anti-freezing protection according to the outdoor environment temperature and the water inlet temperature and the water outlet temperature of the kth module machine, a water pump and a control valve which correspond to the kth module machine are controlled to be started, and whether the water inlet temperature and the water outlet temperature of the kth module machine meet the first preset condition or not is judged after first preset time; and if the first preset condition is not met, the water pump and the control valve corresponding to each module machine are controlled to be in a started state when the kth module machine is in a normal usable state, the kth module machine is started to conduct heating, and therefore unnecessary starting and stopping caused by the anti-freezing protection need are reduced, and the probability that a certain module machine is frozen to be damaged due to faults is lowered.

The invention provides a low-pressure protection control method and device and an air conditioner, and relates to the technical field of air conditioners. The low-pressure protection control method comprises the steps that a return air temperature value, an evaporator outlet temperature value, an oil temperature value and a coil pipe temperature value are received; and according to the return air temperature value, the evaporator outlet temperature value, the oil temperature value and the coil pipe temperature value, a low-pressure protection instruction or a normal operation instruction is sent out so as to control frequency reduction or shutdown of a compressor of the air conditioner or control normal operation of the compressor. The invention further provides the low-pressure protection control device and the air conditioner. The low-pressure protection control method can be executed by the low-pressure protection control device and the air conditioner. According to the low-pressure protection control method and device and the air conditioner, the problem that the service life of the compressor is shortened due to frequent start-stop or fluctuation of the compressor can be solved.

The invention discloses a height-adjustable gantry welding machine, which comprises a base and a frame installed on the base; the frame includes a column and a hanger installed on the column; the hanger is two U-shaped beams passing through Two long rods are connected, and the middle part of the long rods is equipped with slide rails, and a moving beam is connected between the slide rails, and a pad that can be stretched up and down is connected to the moving beam; multiple pads are connected to the pad. Welding joints; there are four uprights, and the upper part of the uprights is a hollow structure, and a coaming plate is connected between the lower parts of the uprights, and the two ends of the U-shaped beam are provided with short inserts that are adapted to the hollow size of the uprights; The frame is also equipped with a chain plate conveyor; a straight rack is arranged in the short insert column, and a gear that cooperates with the rack is arranged in the column. Adoption of the present invention effectively improves and reduces the starting and stopping of the welding machine, and saves electric energy.

The invention provides a steady flow compensation system of water supply equipment. The steady flow compensation system comprises a three-tank structure, an all-variable speed pressurization unit and an energy storage and pressurization unit; the three-tank structure is a tank-split type integrated structure composed of a low pressure tank, a high pressure tank and an ultrahigh pressure tank, the low pressure tank is connected between a water inlet pipe of a municipal pipe network and the all-variable speed pressurization unit, and the high pressure tank is connected with the low pressure tank through a countercurrent compensator; the high pressure tank and the low pressure tank are each internally provided with a food-grade air bag, and the two air bags are connected through the energy storage and pressurization unit. The all-variable speed pressurization unit and the energy storage and pressurization unit are connected to a user pipe network through a water outlet pipe. According to the steady flow compensation system, a traditional single-tank multi-cavity structure is omitted, multiple tanks are integrated, the size is reduced by nearly 2 / 3 compared with a traditional single tank, the problems that production and manufacturing difficulty is high, transport is inconvenient, and the working procedure is complex are solved, maintenance is convenient, and safety is high.

The invention discloses an adjacent joint space trajectory transition method and device. The adjacent joint space trajectory transition method comprises the steps that time synchronization is carriedout on all shafts in an adjacent space to enable the synchronization time of the shafts to reach each position; the final speed of a current segment of a trajectory is taken as the initial speed of anext segment of the trajectory, the initial speed of the current segment of the trajectory is taken as the final speed of the previous segment of the trajectory, and trajectory planning is carried outto enable the speeds of adjacent spaces to be in smooth transition; and interpolation operation is carried out according to output data of the trajectory planning so as to enable the trajectory to becontinuous. The adjacent joint space trajectory transition method and device have the advantages that the spot speed of each intermediate process is smooth, unnecessary start and stop are reduced, and time cost and energy consumption cost are reduced.

The invention discloses a single-span rotor fault location diagnosis method and system based on a three-dimensional coordinate system, and relates to the field of fault diagnosis of steam turbine generator sets. The method comprises the following steps: establishing the three-dimensional coordinate system, and taking the circle center of one end face of a rotor as an origin, wherein an X axis anda Z axis are along the radial direction of the rotor, and a Y axis is along the axial direction of the rotor; establishing an axial mechanical model of a YZ plane of the rotor; and calculating a coordinate location of a fault of the rotor in the three-dimensional coordinate system. The single-span rotor fault location diagnosis method and system disclosed by the invention have the advantages thatthe specific location of a fault point of the rotor in a three-dimensional space can be accurately identified, and a favorable evidence is provided for the subsequent fault diagnosis processing.

The invention discloses a model predictive control-based optimization scheduling framework for a system containing a photo-thermal power station. Aiming at solving the problems that according to an existing determined open-loop control model, due to the fact that the transmission of control deviation between adjacent control time periods caused by system power prediction errors and other uncertain factors is ignored, the system control effect is affected, the invention introduces the thought of model predictive control, and a coordinated scheduling framework comprising two links of rolling optimization and real-time dynamic adjustment is established; and then, based on the power balance equation, a power balance equation in the photo-thermal power station and related constraints, a prediction model of a combined power generation system in which the photo-thermal power station participates is constructed, and on this basis, a rolling optimization scheduling model and a real-time dynamic adjustment model are established. According to the scheduling method provided by the invention, real-time tracking of an optimization target can be realized, the influence of a multi-source power prediction error on scheduling is effectively considered, and the economical efficiency and the reliability of the power system containing the heat storage photo-thermal power station are improved.

The invention discloses a mine underground automatic coal mixing system which can realize transferring a coal mixing process to the underground, realizes a coal mixing process while a metering hopperloads coal, reduces a special coal mixing process on the ground, is higher in proportioning precision in comparison with ground coal mixing, and realizes mixed coal outside a well mouth. According tothe following technical scheme adopted by the invention, two or more coal bins are arranged above a main well loading region, the bottom of each coal bin is equipped with a coal feeder, each coal feeder is connected with a frequency converter, and the frequency converter is connected to an upper computer through a communication cable; an adhesive tape conveyor used for coal unloading and transferring of the coal bins is positioned below the coal bins; and the metering hopper is mounted below one side of the adhesive tape conveyor.

The invention provides an oil-gas cooler system of a variable-frequency oil injection screw air compressor. The oil-gas cooler system comprises an oil cooler, an air cooler, a fan, a fan cover and a temperature control valve. A first oil cooling channel, a second oil cooling channel and a communication area are arranged in the oil cooler. Screw oil separated from an oil-gas barrel can enter the first oil cooling channel for primary cooling; and the temperature control valve selects the screw oil to flow back to a screw machine body or to flow back to the screw machine body after being subjected to secondary cooling through the second oil cooling channel according to the temperature of a valve core. An oil cooler in the prior art is split into the first oil cooling channel and the second oil cooling channel, but the heat exchange amount of the oil cooler is kept unchanged. When the air compressor works under the load of 20-100%, the heat of the screw oil and the heat exchange amount of the oil cooler are basically balanced, the exhaust temperature is stable, no condensate water is separated out in the working process, and the service life of the screw oil and the service life of a screw machine body bearing are prolonged; and the start-stop frequency of the cooling fan is reduced, the service life of the cooling fan is prolonged, and the reliability of the cooling fan is improved.

The method applies refrigerant mixed by two or above compositions to change circulating media concentration through a separation unit; when load is increased at heat pump operation system separates composition of high boiling point through separation unit to raise concentration of low boiling point media in circulation for enhancing ability of heating at low temperature environment; when load is decreased high boiling point composition of high concentration stored in low pressure liquid storage tank at bottom part of separation unit is absorbed systematically through heating means to decrease heat generating amount of system.

The invention provides a vehicle engine automatic start-stop control system and method based on vehicle-road coordination. The method includes: when temporarily parking, the communication module obtains the traffic light information, and determines whether the vehicle is at the traffic light intersection; if so, the analysis module sends the corresponding information to the vehicle start-stop module according to the red light waiting time and the information of the preceding vehicle in the same lane, combined with the preset control strategy. On the contrary, the analysis module obtains the stop time sent by the vehicle information module to determine whether the engine needs to be turned off. When the engine is turned off, if the vehicle information module detects that the vehicle needs to be started, the analysis module sends a control command to start the engine to the vehicle start-stop module. The invention realizes that when a vehicle is waiting at a traffic light intersection, it can intelligently control the start and stop of the engine according to the time of the red light and the information of whether the preceding vehicle is traveling, thereby realizing the purposes of smoother running, quick start, fuel saving and the like of the vehicle.

The invention provides an acceleration and deceleration control method in the trajectory planning of a numerical control system. Assuming that the total running time of the numerical control system during processing is T, the total running time is divided into seven time periods, which are respectively 0 to t 1 , t 1 ~t 2 , t 2 ~t 3 , t 3 ~t 4 , t 4 ~t 5 , t 5 ~t 6 , t 6 ~t 7 , define the time interval of each time period as T i (i=1,2,3...,7), then T 1 The corresponding time period is from 0 to t 1 , T 2 The corresponding time period is t 1 ~t 2 , T 3 The corresponding time period is t 2 ~t 3 , T 4 The corresponding time period is t 3 ~t 4 ,T 5 The corresponding time period is t 4 ~t 5 ,T 6 The corresponding time period is t 5 ~t 6 ,T 7 The corresponding time period is t 6 ~t 7 , the algorithm expression used when planning the acceleration and deceleration curve model is where j(t) is the function of jerk with respect to time t, j max For the maximum value of jerk during operation, the acceleration and deceleration control method in the trajectory planning of the numerical control system provided by the present invention intersects with the prior art, the control algorithm model is simpler, the jerk curve is smoother, and the numerical control is directly reduced. The system starts and stops.

The invention relates to a constant-power flexible operation control method, system and device and a storage medium, and the method comprises the following steps of analyzing the type of a source load with the load regulation and control capability in a power distribution system, and determining a power relation in the power distribution system; and on the basis of a preset load adjustment rule and the power relation in the power distribution system, controlling the charging and discharging states of each source load, so that the stable constant-power flexible operation of the power distribution system is realized. According to the present invention, on the basis of giving full play to the distributed photovoltaic power generation capacity, through the coordinated control over an energy storage device and a controllable load, the power purchase cost in an area is reduced, the energy conservation and emission reduction of a building are achieved, the construction investment cost is reduced, and the clean energy consumption capacity is improved. The method can be widely applied to the field of building power distribution system construction.

The invention discloses an upper driving mechanism applicable for a high-speed stacker. The upper driving mechanism comprises a driving mechanism, cranks, driving wheels, an upper box body and a guidesky rail; the driving wheels are arranged on the both sides of the guide sky rail, and installed on the cranks with the driving mechanism; the cranks are connected to the upper box body, and can be rotated around the connection position; and a pressure regulating device is arranged between the cranks, and pressure applied to the guide sky rail by the driving wheels is regulated through the pressure regulating device indirectly. According to the upper driving mechanism, the time that the speed of the stacker is increased to the maximum speed from zero speed or decreased to the zero speed fromthe maximum speed can be shortened, so that the start and stop of the stacker can be finished within the shorter time.

The pressure control system for the frequency conversion compressor in the frequency conversion air conditioner, the output end of the fixed speed compressor is connected to the high pressure switch through the first check valve, the output end of the frequency conversion compressor is connected to the high pressure switch through the oil separator and the second check valve in turn, and the high pressure switch Connect the a-side of the four-way valve, the b-side of the four-way valve is connected to the condenser, the condenser is connected to the electronic expansion valve and the third capillary, the electronic expansion valve and the third capillary are connected to the liquid storage tank, and the d-side of the four-way valve is connected to the fixed-speed compressor and the input end of the variable frequency compressor, the c-end of the four-way valve is connected to the evaporator and the liquid storage tank in turn, the c-end of the four-way valve is also connected to the first capillary and the electromagnetic valve for refrigeration in turn, and the other end of the electromagnetic valve for refrigeration is connected to the constant speed The compressor is connected to the input end of the variable frequency compressor, the d end of the four-way valve is connected to the second capillary and the solenoid valve for heating in turn, the solenoid valve for heating is connected to the b end of the four-way valve and one end of the electronic expansion valve, and the other two ends of the electronic expansion valve The terminals are respectively connected to the liquid storage tank and the condenser. The invention reduces the start and stop of the compressor and prolongs the service life.

A refrigerant storage device proposed by the present invention includes an upper shell, a lower shell, a sealing ring, a sealing piece, a hollow nut, a hollow screw, a cylindrical spring, and a piston device, which can store and adjust the refrigerant and the pressure of the refrigerant. adjust. The refrigeration system with the refrigerant storage device proposed by the present invention is respectively provided with a first refrigerant storage device and a second refrigerant storage device after the compressor and the second heat exchanger, and the first and second refrigerant storage devices Adjust the refrigerant in the system to optimize the efficiency of the system, and this refrigeration system with a refrigerant storage device can expand the refrigeration capacity of the compressor, reduce the start and stop of the compressor, reduce energy consumption, and can also improve the refrigeration system. Cooling accuracy, it can be used in occasions where the fluctuation frequency of heat load is high and the fluctuation frequency and fluctuation range are relatively clear, and has high working efficiency.

The invention provides textile production equipment for clothing. The textile production equipment comprises a traction winding device for winding woven cloth to form a cloth roll, and a power driving device for driving the traction winding device to rotate; the traction winding device comprises a traction mechanism for pulling the woven cloth and a cloth collecting mechanism for collecting the woven cloth; and the cloth collecting mechanism comprises a first winding device for winding one side of the woven cloth, a second winding device for winding the other side of the woven cloth, and a limiting device for positioning the woven cloth. According to the textile production equipment, through cooperation of multiple first winding parts and multiple second winding parts, the effect of manpower in the winding process is reduced, starting and stopping of a circular knitting machine are reduced, the mechanical failure rate is reduced, and the production efficiency is improved. The invention further provides a textile production process for the clothing.

The invention discloses an intelligent driving navigation planning and control method and system. The method comprises the following steps: generating a navigation path according to a destination; carrying out fusion processing on the path point information on the navigation path and the real-time road condition information to obtain a fusion result; and controlling the vehicle to move according to the fusion result. Compared with the traditional navigation only for reminding, the intelligent driving navigation planning and control method and system have the advantages that data fusion control is carried out by utilizing navigation data and road condition data on the basis of an automatic driving technology of an intelligent automobile, automatic control is carried out in the navigation process, optimal driving of the automobile is kept, and frequent acceleration braking, starting, stopping and the like of the automobile are reduced; therefore, vehicle abrasion can be reduced, and meanwhile tail gas emission is reduced.

The invention relates to the technical field of optical fiber manufacturing equipment, and discloses a heating furnace for keeping centering of an optical fiber preform, the heating furnace comprises a furnace body, a heating piece and a rotating table, the rotating table is arranged above the furnace body, the upper end of the furnace body is connected with a detection piece through the rotating table, and the rotating table comprises a rotating ring and a base. According to the heating furnace for keeping centering of the optical fiber preform and the use method thereof, the eccentricity condition of the preform is measured through the detection piece, then the preform is directly adjusted in place through the movable clamp, starting and stopping in the centering process are reduced, centering errors are reduced, early warning is conducted when the preform is about to collide with the furnace wall, the preform is prevented from colliding with the furnace wall, meanwhile, the operation of secondary delivery is reduced, and the inner diameter of the heating piece is synchronously adjusted after the detection piece detects the outer diameters of different axial positions, so that the gap between the heating piece and the preform rod is always kept at the optimal distance, the heating uniformity is improved, and the wire drawing quality is improved.

The invention relates to the technical field of material cutting, in particular to a feeding, scanning and cutting integrated automatic cutting machine which sequentially comprises a feeding device, a linear scanning device and a cutting device, and the feeding device is arranged at the feeding end of the cutting device and conveys materials for the cutting device. The linear scanning device is arranged in the width direction of the cutting device in a crossing mode and used for scanning material patterns and uploading the material patterns to a control system. The cutting device is used for cutting the materials along the scanning patterns, pattern information on the materials is scanned in the material conveying process under the cooperative action of the feeding device, the cutting device and the linear scanning device, the materials are scanned while being conveyed, and the pattern information is uploaded to the control system, so that the cutting device cuts the materials according to the scanning patterns. Real-time scanning and cutting are carried out, dynamic scanning and dynamic cutting are carried out under the state that feeding is not stopped, machine starting and stopping are reduced, the working efficiency is greatly improved, and the technical problem that traditional cutting is limited by feeding precision is solved.

The invention provides textile production equipment for fabrics. The textile production equipment comprises a traction winding device for winding woven cloth to form a cloth roll, and a power driving device for driving the traction winding device to rotate; the traction winding device comprises a traction mechanism for pulling the woven cloth and a cloth collecting mechanism for collecting the woven cloth; and the cloth collecting mechanism comprises a first winding device for winding one side of the woven cloth, a second winding device for winding the other side of the woven cloth and a cutting device for cutting the woven cloth. According to the textile production equipment, through cooperation of multiple first winding parts and multiple second winding parts, the effect of manpower in the winding process is reduced, starting and stopping of a circular knitting machine are reduced, the mechanical failure rate is reduced, and the production efficiency is improved. The invention further provides a textile production method for the fabrics.

The invention discloses a 5G technology-based electric vehicle ramp driving speed optimization method. The method comprises the following steps of S1, obtaining ramp data and driving data in a vehicle driving process; s2, calculating the energy consumption of the vehicle according to the ramp data and the driving data; and S3, calculating the optimal driving force and the vehicle speed of the vehicle passing through the ramp, so that the energy consumption accumulated value of the vehicle passing through the ramp within the preset time period is the lowest. The ramp data is acquired in real time based on the 5G Internet of Things technology, and the real-time speed and driving force of the vehicle are optimized by taking the lowest energy consumption of the vehicle passing through the ramp within the predetermined time period as the target function, so that the energy consumption of the vehicle passing through the ramp is reduced; and meanwhile, the phenomena of start-stop, idling, rapid deceleration, rapid acceleration and the like of the electric vehicle on a crossing ramp are reduced, so that the vehicle passing efficiency is improved.