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 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 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 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 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 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.