37results about How to "Short control time" patented technology

An airconditioner system for integrating multiple areas. A plurality of multi-airconditioners are grouped into some groups. CPU connected in parallel to individual multi-airconditioner groups, that have been distributed and installed in a wide area or building, controls individual multi-airconditioner groups to be operated simultaneously, resulting in a shorter control time. Although an unexpected communication failure occurs in one multi-airconditioner group, the remaining multi-airconditioner groups other than the erroneous multi-airconditioner group can be normally controlled, resulting in increased stability and reliability of an overall airconditioning system.

A method for controlling the flow of a multiphase fluid from a well extending into a subsurface formation, which well is provided at a downstream position with a valve having a variable aperture, which method comprises allowing the multiphase fluid to flow at a selected aperture of the valve; selecting a flow parameter of the multiphase fluid, which flow parameter is responsive to changes in a gas/liquid ratio of the multiphase fluid at an upstream position in the well, and a setpoint for the flow parameter; and monitoring the flow parameter; controlling the flow parameter towards its setpoint by manipulating the aperture of the valve; wherein the control time between detection of a deviation from the setpoint and the manipulation of the aperture is shorter than the time needed for the multiphase fluid to travel 25% of the distance between the upstream and downstream positions. Further a well extending into a subsurface formation for producing a multiphase fluid to surface, which well is provided at a downstream position with a valve having a variable aperture, and with a control system for controlling the multiphase flow.

The invention provides a pulse generator applied to distributing continuous variable quantum secret keys. The pulse generator comprises a digital circuit (1) and an analog circuit (2). The digital circuit (1) comprises a first programmable pulse width modulation chip (3) and a first programmable delay wire chip (5), a second programmable pulse width modulation chip (4) and a second programmable delay wire chip (6). The analog circuit (2) comprises a first power amplifying circuit (7) and a second power amplifying circuit (8). An externally input clock signal triggers the digital circuit (1) to generate two pulses of which the pulse and time delay can be accurately adjusted, and the two pulses are output through first power amplifying circuit (7) and the second power amplifying circuit (8) in the simulation circuit (2) respectively. The pulse generator has the advantages of being capable of accurately adjusting the pulse width, high in time delay accuracy, short in control time, high in driving capacity, small in size, low in cost and the like, and the pulse generator can be integrated in a system for distributing the continuous variable quantum secret keys very well.

The embodiment of the invention discloses an automatic driving control method, device and system. The system includes a processor, a computer system and an industrial personal computer system; the computer system is used for generating first driving path planning information and second driving path planning information according to the state data of a vehicle and a surrounding environment which are transmitted by a sensor system; the first driving path planning information is used for generating a control message; the control message is sent to a vehicle chassis system so as to carry out motion control on the vehicle; the second driving path planning information is provided for the industrial personal computer system in real time; the industrial personal computer system is used for storingthe second driving path planning information provided by the computer system, monitoring the running state of the computer system, and controlling the vehicle to park beside by utilizing the second driving path planning information and the state data, transmitted by the sensor system, of the vehicle and the surrounding environment when the computer system is abnormal. According to the embodimentof the invention, the reliability of an automatic driving automobile can be improved.

The invention discloses a freezing apparatus for separated Hopkinson pole experiment measurement, belonging to the technical field of freezing apparatuses. The freezing apparatus comprises a low-temperature environment box, a liquid nitrogen generation device and a temperature control device, wherein the temperature control device comprises a temperature controller; the temperature controller comprises a signal input interface and a signal output interface; the signal output interface is sequentially connected with a phase inverter and a solid-state relay; the solid-state relay A is connected with a heating wire A; the signal input interface is connected with a temperature measuring unit; the temperature measuring unit is used for measuring the temperature of a sample; and a heating wire B is arranged on a conduit of the liquid nitrogen generation device. According to the device, due to the combined operation of the heating wire A and the heating wire B, the aim of simultaneously controlling the liquid nitrogen ejection speed and the liquid nitrogen outlet temperature is achieved, the time in the control process is short, and the amount of liquid nitrogen is small.

An electronic device includes an audio player and a processing unit. The processing unit includes a detection module, a timer module, and a control module. The detection module is used to detect an output volume produced currently when the audio player produces sound and to determine whether the output volume conforms to a volume control standard. The timer module is signally connected with the detection module and used to calculate the cumulative time during which the output volume produced by the audio player conforms to the volume control standard when the output volume conforms to the volume control standard and to determine whether the cumulative time equals the control time. The control module is signally connected with the timer module and used to control the audio player to decrease the volume of an output sound or to stop outputting sound when the cumulative time equals the control time.

The invention provides a control method for a low pressure chemical vapor deposition (LPCVD) technical production environment. The control method comprises the following steps that: S1, a temperature sensor acquires temperature information in a reaction cavity, and a vacuum degree sensor acquires vacuum degree information in the reaction cavity; S2, a feedback control device acquires the temperature information and the vacuum degree information and calculates feedback control gain parameters according to the temperature information and the vacuum degree information; S3, the feedback control device generates a temperature control signal according to the temperature information and the corresponding feedback control gain parameter and a vacuum degree control signal according to the vacuum degree information and the corresponding feedback control gain parameter, and sends the temperature control signal and the vacuum degree control signal to a temperature adjustment device and a vacuum degree adjustment device; S4, the temperature adjustment device adjusts the temperature in the reaction cavity according to the temperature control signal, and the vacuum degree adjustment device adjusts the vacuum degree in the reaction cavity according to the vacuum degree control signal.

The invention discloses an intelligent correction device control system for a super-resolution photoetching precision mask. The control system is combined with an optical system to realize accurate expected mask deformation control. The master control of the intelligent control system is completed through a high-performance industrial personal computer, and the intelligent control system comprisesan upper computer control system, an image acquisition subsystem, an image processing subsystem, an alignment subsystem, an illumination subsystem and a sixteen-path independent fine adjustment maskdeformation control subsystem. Through combined control of all subsystems of the control system, expected precise mask deformation control can be achieved, and compared with an existing implementationmethod, the steps are simpler and more convenient, and implementation of the control system is more economical. In addition, the control system adopts a PCIe channel and an independent display card to transmit and process an alignment image signal, and mask precision deformation control adopts a PID closed-loop control algorithm to realize precision regulation and control, so that the subsystem efficiency is improved, and the system can realize mask deformation control and alignment more quickly and accurately.

The invention discloses a farmland irrigation system, which comprises electromagnetic valves, capillary pipes and main pipeline equipment, wherein the electromagnetic valves are respectively connected with the capillary pipes and the main pipeline, in one piece of farmland, one end opening of each capillary pipe of the four capillary pipes is respectively provided with one electromagnetic valve, one end of the main pipeline is connected with one electromagnetic valve, and the other end of the main pipeline is respectively connected with the electromagnetic valves of the four capillary pipes. The farmland irrigation system has the characteristics that the energy consumption is low, and the control is easy. The farmland irrigation system is suitable for being popularized and applied.

The invention relates to a well drilling wellhead anti-overflow control system which comprises a semi-sealing large valve element flashboard and a semi-sealing small valve element flashboard on a wellhead main four way, a full-sealing singe flashboard and an annular bop; the top of the annular bop is connected with an anti-overflow pipe; a blowoff manifold is connected with the right side of the wellhead main four way; the outlet of the blowoff manifold is connected with a throttling manifold; a blowoff flat valve is arranged at the inlet of the throttling manifold; a reverse circulation manifold is connected with the left side of the wellhead main four way; a semi-sealing bop is a double gate disc bop composed of the semi-sealing large valve element flashboard and the semi-sealing small valve element flashboard; the large and small valve element flashboards are controlled by large and small valve element liquid rotary valves; an operating handle is connected with the piston rod of a semi-sealing air cylinder; compressed air is connected with a blowoff pneumatic control valve I, an annular pneumatic control valve and the ports P of semi-sealing large and small valve element pneumatic control valves; and the ports A of the semi-sealing large and small valve element pneumatic control valves are connected with the upper cavity gas ports of semi-sealing large and small valve element air cylinders through semi-sealing large and small valve element shuttle valves. The well drilling wellhead anti-overflow control system can realize soft closing for underground drilling tools withdifferent specifications.

The invention provides a train brake cylinder pressure control method and system, and the method comprises the steps: collecting a Cv pressure value outputted by an electromagnetic valve under a control strategy of an emergency brake test before a train leaves a garage; calculating electromagnetic valve parameters according to the Cv pressure value; when the train runs on line, the C-Cv linear fitting function of the relay valve is updated according to the collected multiple groups of C-Cv pressure values; calculating a Cv pressure target value according to a preset C pressure target value and the C-Cv linear fitting function; and outputting a control signal according to the Cv pressure target value and the electromagnetic valve parameter, and controlling an electromagnetic valve to act so as to output the corresponding Cv pressure. By estimating the parameters of the electromagnetic valve and the relay valve and controlling the pressure of the brake cylinder according to the parameters, higher accuracy, higher control speed and fewer action times of the electromagnetic valve are achieved, and the service life of the valve is greatly prolonged.

Disclosed are a method of and a system for controlling frame synchronization for European Digital Audio Broadcast (DAB), the method including the steps of generating a frame synchronization start-signal with respect to an incoming signal which is input when power is supplied, keeping symbol count values with the value “0” after the frame synchronization start-signal is input, transmitting a frame offset value with respect to the incoming signal, and restarting symbol counting for frame synchronization depending on the frame offset value after the frame offset value is input, wherein the frame synchronization unit may preferably transmit the frame offset value after estimating the frame offset value. In accordance with the method and system described herein, it is possible to achieve frame synchronization in short time, thereby reducing a startup time of a DAB receiver and power consumption which is needed for the frame synchronization.

The invention relates to a temperature control method of a diamond cubic press. The temperature control method comprises the following steps: 1, establishing a three-axis three-dimensional coordinate system by using a center point of a cavity inside the diamond cubic press as an original point, setting s heat sources in the cavity inside the diamond cubic press, wherein each heat source has a coordinate P in the coordinate system, the temperature value of each heat source is T, and the T is decomposed onto an x axis, a y axis and a z axis to form three temperature components; setting three particle swarms, wherein the three particle swarms are respectively sets of the temperature components of the s heat sources in directions of the three axes; the temperature components in the particle swarms are called as particles, the three particle swarms internally comprise s particles; 2, respectively optimizing the three particle swarms by using a particle swarm optimizing algorithm; and 3, controlling the heating intensity of the s heat sources by adopting a PID algorithm according to data in the three optimized particle swarms, so as to achieve the purpose of controlling the temperature of the cavity inside the diamond cubic press. The temperature control method is short in control time, accurate in control and stable in effect.