145results about How to "Avoid over-regulation" patented technology

The invention discloses a method for controlling the opening of an electronic expansion valve in a heat pump water heater system, and aims to provide a control method for allowing a system to avoid an area in which the air suction degree of superheat drops suddenly in the running process and allowing the coefficient of performance (COP) of the system to keep a high level. The method comprises thefollowing steps of: setting the optimum value of the change rate delta T/delta t of the air suction degree of superheat, and setting the initial opening of the expansion valve as 80 percent of total opening; taking a temperature difference between an average temperature value at an air suction port of a compressor and the saturated evaporating temperature as the air suction degree of superheat when the compressor runs to the state of the stable running of the system; measuring and calculating the air suction degree of superheat at the interval time delta t; calculating the change rate of the actual air suction degree of superheat according to the adjacent two-time air suction degree of superheat, comparing with the set optimum value of the change rate of the air suction degree of superheat, and when the change rate of the actual air suction degree of superheat is less than or equal to A, reducing the opening of the expansion valve; when the change rate of the actual air suction degreeof superheat is more than 0, increasing the opening of the expansion valve; and when the change rate of the actual air suction degree of superheat is more than A and is less than or equal to 0, maintaining the current running state.

The invention discloses a soft base station system and process of synchronizing based on optical fiber zooming out. Presently, direct sending stations are used to expand the signal coverage in the mobile communication network, but noise level and low sensitivity are also brought in. The soft base station system based on optical fiber will transform the radio frequency signal directly coupled from the large capacity base station into optical signal through analog optical modulation, which will be transmitted to the soft base station via. the optical fiber, the soft base station will transform the optical signal into the electrical signal, which will radiate to the needed coverage via the service antenna. Apart from all the advantages resulted from using digital transmission and receiving machine, the soft base station has bee proved to increase system capacity, improve the network quality and reduce the occurrence of disconnection.

The invention discloses a method for installing a nuclear power half-speed steam turbine. The method comprises the steps of I, foundation inspection and secondary embedded installation; II, assembly and installation of a low-pressure cylinder; III, assembly and installation of a high and middle-pressure cylinder; IV, axis alignment and connection installation. The assembly and installation of a high and middle-pressure cylinder comprise the steps of (1), overhaul and installation of a thrust bearing; (2) measurement and regulation of a middle gland casing; (3) load distribution of the high and middle-pressure cylinder. The method has the advantages that load measurement is performed on a claw of the high and middle-pressure cylinder through a hydraulic jacking method, the method is simple in operation and high in measurement accuracy, jacking oil is injected during axis alignment, and accuracy of axis alignment is ensured.

A brake apparatus having an automatic clearance adjusting mechanism with an overadjustment preventer constituted such that a piston is constituted by a structure of being divided in a plug piston 16 and a ring piston 14. The plug piston 16 is integrated with an adjusting nut 20, a bearing 21, a bearing support plate 22 and a spring holder 23. An outer side claw portion 23a of the holder is locked by an outer side groove 16 of the plug piston. The plug piston 16 integrated with the respective parts is inserted to fit to the ring piston 14 to thereby prevent the outer side claw portion 23a of the holder from being detached.

The invention provides a light source automatic tracking type solar collecting device. The light source automatic tracking type solar collecting device can automatically track a sun light source, a solar cell panel can be irradiated by sun light vertically and continuously, and therefore the light energy conversion efficiency is improved. The light source automatic tracking type solar collecting device comprises a base, a solar cell panel base is movably connected to the base through a horizontal steering device and a dip angle pitching device, the solar cell panel is flatly laid on the solar cell panel base, a horizontal steering collecting pipe and a dip angle pitching collecting pipe which are perpendicular to the solar cell panel are arranged on one side of the solar cell panel base, and photoelectric sensors are arranged in the horizontal steering collecting pipe and the dip angle pitching collecting pipe. A control device is further included. The invention further provides a control method of the device.

The invention discloses a novel efficient numerical control gear grinding machine which comprises a machine frame, a left-right workbench, a front-rear workbench, a Z-axis sliding mechanism, a C-axis workpiece clamping and holding mechanism, an X-axis sliding mechanism, a B-axis rotating mechanism, a V-axis trimming mechanism, a U-axis trimming mechanism and a grinding head mechanism. The left-right workbench is horizontally arranged at the front portion of the machine frame; the C-axis workpiece clamping and holding mechanism is arranged on the left-right workbench; the front-rear workbench is longitudinally arranged at the tail portion of the machine frame; the grinding head mechanism is arranged on the front-rear workbench. The novel efficient numerical control gear grinding machine is ingenious and reasonable in design, easy to operate, multifunctional, capable of grinding ordinary spur gears, bevel gears, screw rods, worms and ring surface worms efficiently, multipurpose and wide in application range, has the function of trimming grinding heads, can efficiently trim the grinding heads of any contour, greatly improves rigidity of the grinding heads, effectively improves machining accuracy, and is simple in overall structure, easy to manufacture and produce, and beneficial to being popularized and applied widely.

The invention discloses a power adjustment method, device and system. The method comprises the following steps that femtocells count coverage information of a current cell and a same-frequency adjacent cell and count interference indexes of the current cell, wherein the coverage information comprises the weak-coverage rate and the over-coverage rate; the femtocells upload the weak-coverage rate and the over-coverage rate of the current cell and the same-frequency adjacent cell and the interference indexes of the current cell to an integrated controller; the femtocells receive power adjustment information returned by the integrated controller according to the weak-coverage rate, the over-coverage rate and the interference indexes and adjust transmission power of itself according to the power adjustment information. According to the power adjustment method, device and system, comprehensive consideration is given to the coverage information and the interference information of the femtocells, the adjustment of the transmission power of all the femtocells is determined in an integrated mode through the integrated controller, in this way, networks of the femtocells can achieve a compromise between coverage and interference, and the overall performance of the networks is effectively improved.

The invention relates to a unit plant coordinative control method and system. The method includes the steps of calculating the main steam pressure control deviation of the unit plant coordinative control system according to a main steam pressure set value and an actual main steam pressure value at the inlet of a boiler main control pressure PID adjustor, setting the first change direction, obtained after a first delay link, of the main steam pressure set value according to the difference value between an original main steam pressure set value and the main steam pressure set value obtained after the delay link, setting the second change direction, obtained after a second delay link, of a plant load instruction according to the difference value between an original plant load instruction and the unit load instruction obtained after the delay link, and online adjusting the delay time of the plant load instruction and the delay time of the main steam pressure set value according to the main steam pressure control deviation, the first change direction and the second change direction.

The invention provides a control method and device for improving comfort of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners. The control method comprises detecting exhaust temperature of a compressor and coil temperature of an indoor heat exchanger; calculating variation amount of exhaust temperature difference and inner plate temperature difference according to the exhaust temperature and the coil temperature of the indoor heat exchanger; and if the variation amount of the inner plate temperature difference is not zero, controlling the compressor to adjust frequency according to the variation amount of the exhaust temperature difference and the inner plate temperature difference. According to the control method and device, frequency adjustment amount of the compressor is corrected according to the variation amount of the exhaust temperature difference and the inner plate temperature difference of the compressor, so that operation frequency of the compressor is accurately controlled; frequent frequency rise and fall of the compressor can be effectively avoided; service life of the compressor is prolonged; energy consumption of the system is reduced; operation reliability of the system is improved; temperature fluctuation caused by excessive adjustment of operating frequency of the compressor can be effectivelyavoided; and use comfort of a user is improved.

The invention discloses a manufacturing process of a toothed rubber roller. The manufacturing process comprises the following steps of: inspecting a mandrel; cleaning the mandrel; coating rubber onto the mandrel; molding a blank of a silicon rubber roller; trimming the working surface of a grinding wheel; grinding the silicon rubber roller; and reshaping the silicon rubber roller. In the manufacturing process of the toothed rubber roller disclosed by the invention, an ordinary circular grinding machine is adopted, and the working surface of the grinding wheel is ground into a toothed surface which is matched with that of the toothed rubber roller, so that adjusting procedures can be reduced, grinding efficiency is high, and high-speed grinding and automatic production are easy to realize. The geometric accuracy and surface roughness of the toothed rubber roller are ideal after grinding, the quality of a product reaches the levels of national and international products, and the production cost is reduced greatly.

The invention provides a lifting apparatus for a projecting system. The lifting apparatus according to the invention includes an adjustable lifting device and a controlling device. The adjustable lifting device is used for moving a housing of the projecting system. The controlling device is coupled to the adjustable lifting device, and used for accessing, responsive to a request signal, a height datum to control the adjustable lifting device to move the housing of the projecting system in accordance with the accessed height datum.

The invention relates to an automatic control sewage treatment system. The automatic control sewage treatment system comprises a sewage treatment module, a PLC (programmable logic controller), a levelsensor for detecting the water level inside a sewage tank, a state detector for detecting the working state parameters of sewage treatment equipment, a water quality data monitor for acquiring waterquality monitoring data in the sewage treatment module, and a server, wherein the server can compute and analyze the water level, the working state parameters of the sewage treatment equipment and thewater quality monitoring data to comprehensively determine the working state of the automatic control sewage treatment system; when the automatic control sewage treatment system is abnormal, the server can at the first time transmit corresponding working instructions to the PLC, and then the PLC automatically controls and adjusts the working equipment and the program parameters of the automatic control sewage treatment system. The automatic control sewage treatment system can achieve comprehensive information collection and analysis, and once abnormality occurs, can timely handle the abnormality, thereby improving the emergency capacity of enterprise sewage treatment and facilitating sewage discharge control for enterprises.

Systems and methods for an industrial I/O controller circuit for frequency input modules that measure the frequency of an electrical input signal using adaptive threshold voltage and/or adaptive hysteresis feedback are shown and described. The systems and methods provide advantages in that the I/O controller circuit can better distinguish between actual input pulses from the electrical input signal, as opposed to unwanted Electromagnetic Interference (EMI) induced input pulses. This maximizes the amount of EMI rejection, independent of the frequency of the moving machine, and results in less time to commission and adjust a sensor, fewer false frequency measurements and less system down time.

The invention discloses an oil mass regulating and controlling method for a multi-connected air conditioning unit. The oil mass regulating and controlling method includes the following concrete steps that a, an oil separator (3) and a gas-liquid separator (4) are communicated through an auxiliary oil return pipe (2); b, the outlet pressure value of a compressor (7) is collected through a first pressure sensor (5), and the inlet pressure value of the compressor (7) is collected through a second pressure sensor (6); c, the high and low pressure ratio of the compressor (7) and the unit load ratio are calculated; d, whether the two conditions that the high and low pressure ratio is larger than 2.6 for 60 min, and the load ratio of the unit is larger than 75% for 60 min are met or not is judged, and if the one or two conditions are met, the next step is executed; e, an auxiliary oil return valve (1) is opened, so that oil in the oil separator (3) is pressed into the gas-liquid separator (4). The method can prevent lubricating oil in the compressor (7) from entering a refrigerating or heating circulating pipeline.

A semiconductor laser device that is suitable for mass production, that permits an improved wire layout, and that permits miniaturization includes leads disposed through each of two side faces of an insulating frame member so as to run from outside to inside the insulating frame member, an LD and a light-receiving element mounted inside the insulating frame member, and wires laid inside the insulating frame member so as to connect the leads to the electrodes of the LD and the light-receiving element. Inside the insulating frame member, the tip of one lead is extended farther inward than the edge of an element mount portion that faces the tip of another lead that is disposed through the same side face of the insulating frame member.

A motor control apparatus includes a detection unit detecting a motor rotational frequency, a storage unit storing an allowable torque at the motor rotational frequency detected by detection unit, a first torque offset generated in a direction opposite to a moving direction of a movable body, a second torque offset generated in one direction regardless of the moving direction of the movable body, a rotor inertia moment, a load inertia moment, and a conversion factor for converting a motor rotation angle in rotary motion of the motor to a moving distance in linear motion of the movable body, and an acceleration calculation unit calculating an acceleration command of the motor for each moving direction of the movable body and each acceleration operation and deceleration operation using the allowable torque, the first torque offset, the second torque offset, the rotor inertia moment, the load inertia moment, and the conversion factor.