35results about How to "Fast regulation" patented technology

The present invention provides a control method for the linkage of internal and external units of a precision air conditioner, which is characterized in that it includes: obtaining the target cooling capacity Q of the compressor n , The target power of the compressor W 1 , The target power of the condenser W 2 , The target power of the evaporator W 3 , according to the energy efficiency ratio function COP of the air conditioner, in Q n (±a%+1), respectively, for the target operating frequency f n , the condensation temperature T cn and the evaporation temperature T en Optimizing within a specific range to obtain the target operating frequency f under the condition that the COP value is the maximum value n d. Target condensation temperature T cn d and the target evaporation temperature T en d, said a is a preset natural number; adjust the speed N of the evaporator according to the target temperature difference between the inlet and outlet of the evaporator, and control the compressor to operate at the target operating frequency f n d operation, and according to the target condensation temperature T of the condenser cn d Adjust the speed M of the condenser, and the target temperature difference between the inlet and outlet of the evaporator is Δt 2 -(T en d‑T en ).

The invention discloses a bifocus micro lens with an aspheric surface and adjustable focal length, belonging to the technical field of optical devices. The bifocus micro lens with the aspheric surface and the adjustable focal length comprises an upper transparent glass substrate, a lower transparent glass substrate, an upper ITO (Indium Tin Oxide) electrode, a lower ITO electrode, a liquid crystal layer and a liquid crystal sealing layer; the contacting surface of the liquid crystal sealing layer and the liquid crystal layer is in a concave aspheric surface shape formed by intersecting a first rotational symmetroid with larger height and smaller curvature radius and a second rotational symmetroid with smaller height and larger curvature radius; the upper ITO electrode has the same shape with the bottom surface of the liquid crystal layer; and the lower ITO electrode consists of an inner circular electrode and an outer annular electrode which are insulated mutually. The bifocus micro lens with the aspheric surface and the adjustable focal length in the invention realizes focal length adjustment and bifocus independent control based on a photoelectric effect of a liquid crystal, has the advantages of compact structure, simple and convenient design and process, easiness in realizing an array structure and integrating with other optical devices, high control speed and the like, and has a wide application prospect in a micro optical system and a micro-optical-electro-mechanical system.

The invention discloses an electrowetting micro-fluid device based on a super-hydrophobic surface. The electrowetting micro-fluid device based on the super-hydrophobic surface mainly comprises a micro-fluid operation lower substrate and an upper substrate. The surface of the lower substrate is provided with a micro-nanometer dual structure which includes a micron structure and a nanometer structure. The micron structure is of a bar-shaped structure and the surface of the micron structure is evenly covered by a conducting layer. A hydrophobic medium layer covers the surface of the conducting layer. The nanometer structure is located in a gap in the bottom of the micron structure and a hydrophobic medium layer covers the surface of the nanometer structure. The lower substrate has the super hydrophobic character. A group of electrode arrays which are arranged in parallel cover the inner surface of the upper substrate. The arrangement direction of the group of the electrodes is vertical to the bar-shaped structure of the lower substrate. A gap between adjacent electrodes is small. A hydrophobic medium layer covers the surface of each electrode. The lower substrate of the electrowetting micro-fluid device provides good fluid hysteresis reducing character and the function of electrowetting at the same time. The dual advantages of a super-hydrophobic surface and the electrowetting technology are combined and the micro-fluid device has the strong driving capacity and the hysteresis weakeningcharacter.

The present invention provides a heat functional composite material, as well as a preparation method and application thereof. The composite material comprises materials in parts by weight: 100 parts of a phase-change material and 0.01-60 parts of heat conduction filler capable of orientation. For the composite material, at a temperature higher than the phase-transition temperature, applying outer force to achieve orientation of the heat conduction filler in a manner of being vertical to a heat flow direction, and testing to obtain a heat conductivity vertical to the orientation direction; and then changing the direction of the outer force to achieve orientation of the heat conduction filler in a manner of being parallel to the heat flow direction, cooling to be lower than the phase-transition temperature, and testing to obtain a heat conductivity in the orientation direction. The tested heat conductivity can be subjected to reversible mutation up to 5 fold, and the heat functional composite material can be applied to the fields of heat energy storage, heat energy control (such as intelligent switches), building energy saving, heat dissipation of microelectronic devices, sensing, phonon devices, phonon computers and the like.

The invention discloses a multi-channel water conservancy system. The multi-channel water conservancy system comprises a plurality of gates, data acquisition stations and a terminal upper computer, wherein the data acquisition station is arranged at each channel; the data acquisition station at each channel is used for acquiring hydrologic monitoring information through all hydrologic monitoring sensors in the channel and sending the acquired hydrologic monitoring information to the terminal upper computer and a gate control mechanism of a closest gate at the upstream of the channel respectively. The gate control mechanism calculates the gate according to the received information and controls the opening and closing of the gate. The terminal upper computer is used for carrying out sorted storage on the received hydrologic monitoring information according to a network address and an identification number of each data acquisition station, calculating a practical-operation opening value of the closest gate at the upstream of each channel by a data processing module and sending the practical-operation opening value to an opening and closing machine in the gate control mechanism of the corresponding channel. The multi-channel water conservancy system disclosed by the invention has the advantages that the opening and closing machine in the gate control mechanism is controlled by the terminal upper computer under a normal mode, and under the emergency situation, opening and closing of the corresponding gate are controlled through one or more gate control mechanisms by switching to an emergency mode.

The invention provides a method for controlling a constant-power inverse model of an ultra- / extra-high voltage magnetically controlled shunt reactor. By adopting the design idea of decomposing and modeling, dynamic effects of a nonlinear element part and an external system of the magnetically controlled shunt reactor are respectively modeled. The structural principle of a magnetic circuit of the magnetically controlled shunt reactor is analyzed, an inverse object equation describing the characteristics of a nonlinear magnetic circuit is established, the characteristics of a saturable magnetic circuit are described with arc hyperbolic function, Taylor's expansion is carried out on a nonlinear equation according to Abel theorem, an exciting current required by a control system is solved through analytic solution, and an inverse object transfer function is built according to the correlation between the external power system and the magnetically controlled shunt reactor. In addition, the control method creates a new idea for designing other nonlinear element controllers.

The invention relates to an on-line control method of liquid nitrogen injection quantity for ultra-low temperature cooling processing. The on-line control method of the liquid nitrogen injection quantity for ultra-low temperature cooling processing comprises the following steps that firstly, a relation model between cutting process parameters and the liquid nitrogen injection quantity is constructed, and the model is placed into an on-line controller for ultra-low temperature processing liquid nitrogen injection. The controller can regulate and control material characteristics, tool parameters, an optimal cutting temperature and heat dissipation ratio coefficients input by a central control computer of a liquid nitrogen supply device based on the collected cutting process parameters of a machine tool numerical control processing system, and expected liquid nitrogen injection quantity is determined by calling the relational model and a parameter database; and meanwhile, the controller collects the temperature of a cutting area online through a thermocouple fixed in an internal jet type cutting tool to feedback and adjust actual liquid nitrogen injection quantity to change within a certain range, so that the cutting area is in an optimal cutting temperature range, the processing quality of parts is ensured, and the service life of the cutting tool is prolonged. The on-line control of the liquid nitrogen injection on-line quantity is achieved according to the heating condition of cutting processing, optimization iteration time is short, and accurate control over the temperature of the cutting area can be quickly realized.

The invention discloses a tunable waveguide grating surface transmitter. A waveguide grating structure is connected to the output end of an input optical waveguide and provided with a grating groove filled with a filling material; a square graphene layer is laid on the top surface of the waveguide grating structure, metal electrodes are arranged on the sides of a grating diffraction area, the metal electrodes on the two sides are connected to the square graphene layer through strip graphene connecting arms, the metal electrodes are connected to the two ends of an external power circuit, and the external power circuit applies voltage to form a passage through the metal electrodes, the strip graphene connecting arms and the square graphene layer; and the square graphene layer is used as a main heating area to heat the waveguide grating structure to regulate and control a grating diffraction angle, and the mode light transmitted in the waveguide is diffracted out towards the upper part ofthe waveguide through the grating diffraction area. According to the invention, the grating diffraction angle is regulated and controlled by regulating the voltages at the two ends of the graphene, the structure is simple, and the optical waveguide phased array laser radar which is small in size, low in cost and high in regulation and control speed is expected to be realized.

A structure and method for realizing pressure oscillation regulation of a low-temperature pipeline system, comprising a low-temperature liquid storage tank with a built-in low-temperature liquid, and a low-temperature pipeline with an open end connected to the low-temperature liquid storage tank and the other end being closed in the low-temperature liquid storage tank. The internal pressure oscillation adjustment module of the adjustment system is installed on the pipeline. The low-temperature pipeline is located in a normal temperature environment. The low-temperature pipeline and the open end of the low-temperature liquid storage tank together form a temperature gradient distribution along the tube axis, thereby inducing pressure oscillation inside the system. . Since the present invention is provided with a low-temperature pipeline whose open end is connected to the low-temperature liquid storage tank and the other end is closed in the low-temperature liquid storage tank, the internal pressure oscillation control module of the adjustment system is installed on the low-temperature pipeline, and by adjusting the position of the oscillation control module, on the one hand The invention can effectively restrain the unfavorable pressure oscillation in the low-temperature pipeline system. On the other hand, it has a simple structure, is easy to implement, can meet the requirements of different control effects, and has fast control speed and reliable performance.

The invention discloses a vehicle attitude adjustment system using precise transmission control, which comprises a controller (1) and four vehicle attitude adjustment servo execution units, wherein the four vehicle attitude adjustment servo execution units are connected with the controller (1) and are respectively Corresponding to the arrangement of each wheel position; the four vehicle attitude adjustment servo execution units have the same structure, each vehicle attitude adjustment servo execution unit includes an oil and gas spring (5), and the oil and gas spring (5) is arranged on the chassis corresponding to each wheel position, The controller 1 controls the charging and discharging of the oil-gas spring (5) to realize the lifting and lowering of the chassis. Compared with the traditional hydraulic system, the system adopts the electric cylinder instead of the hydraulic pump station to provide power for the system, cancels the overflow unit in the traditional hydraulic system, and has higher energy utilization rate.

The invention relates to a polarization control method used in the wave surface reference source of a fiber point diffraction interferometer. The spherical wave diffracted by a fiber is collimated by a high-quality collimating lens, and then passes through a rotatable polarizer placed on a single-axis displacement stage, and is placed in a pass through A double-layer density disk with a hole, a pentaprism placed on a uniaxial translation stage and an optical power meter, the polarization state of the initial beam can be determined by theoretical calculation using a rotatable polarizer; then the rotatable polarizer is moved out with a uniaxial translation In the optical path, turn the double-layer density disk to the circularly polarized light detection state, that is, 1 / 4 wave plate + polarizer, use the initial beam polarization state obtained in the previous step to calculate the control voltage of the two control channels of the polarization controller, and then fine-tune, The circular polarization state can be obtained by observing the reading of the optical power meter until the extinction. This system can realize the rapid adjustment of the circular polarization state without introducing additional errors to the wavefront reference source, and can effectively improve the contrast and detection accuracy of interference fringes.

The present invention relates to a method and device for improving the reliability of the start-up water level of waste heat boilers in gas turbine power plants. The high water level alarm setting corresponding to the steam drum is divided into three working conditions, which are characterized in that: the high water level alarm of the second working condition is customized as follows: 1) The water level parameter of the high pressure steam drum at the start-up stage of the unit, the target water level is -300mm , the high alarm value is -100mm, and the high jump value is 200mm; 2) The water level parameters of the medium pressure steam drum at the start-up stage of the unit, the target water level is -150mm, the high alarm value is 0mm, and the high jump value is 200mm; 3) High and medium pressure steam drums The high water level alarm value is at a relatively low value during the start-up phase of the unit. When the alarm is triggered, the monitoring personnel have enough time to intervene on the water level. The invention has the beneficial effects of fast regulating speed, high efficiency, safety and reliability.