39results about How to "Achieve effective control" patented technology

The invention discloses an electric field coupling-based wireless power transmission system. The system comprises a power supply circuit, a high-frequency inverter circuit, a tuning circuit, an electric field coupling polar plate, a rectifier filter circuit and a load circuit and is characterized by also comprising a coupling capacitance detection module, a controller and a fixed frequency drive circuit; a capacitance compensation array is arranged in the tuning circuit; the controller detects parameters of the electric field coupling polar plate and controls compensation values of the capacitance compensation array through the coupling capacitance detection module, and outputs fixed frequency control signals; and the fixed frequency signals are transmitted to the fixed frequency drive circuit, and then the high-frequency inverter circuit is driven to work. The electric field coupling-based wireless power transmission system has the advantages that based on the electric field coupling, the transmission capacity and efficiency of the system are improved by adopting an E amplifier; and by arranging the coupling capacitance detection module, the electric field coupling polar plate of the system is detected in real time, and the capacitance compensation value can be effectively controlled, so that the system is kept in the soft switching state, and the power transmission stability and reliability of the system are improved.

The invention relates to a bridge crane system control method based on a layered sliding mode control theory. A sliding mode controller is established by applying the sliding mode control theory. Aiming at the under-actuated characteristic of a bridge crane system, the layered sliding mode control theory is selected for designing a controller. According to the invention, the under-actuated characteristic of the bridge crane system is used; large and small vehicle displacement error sliding mode functions, a hoisting swing angle error sliding mode function and a total sliding mode function in large and small vehicle running direction are constructed, the effective control over an equivalent control rate and a switching control rate solid line bridge type crane system is designed, and the effectiveness of the method is checked through simulation and comparison with a traditional PID control method.

The invention relates to a high-strength hollow fiber zeolite membrane and its preparation method, characterized in that the support of the high-strength zeolite membrane has a multi-channel hollow fiber configuration. The preparation method comprises first preparing a crystal seed solution, then immersing the dry support with the multi-channel hollow fiber configuration in the crystal seed solution, and extracting and drying the support to obtain a crystal-seeded support; and finally placing the crystal-seeded support in a zeolite membrane synthetic fluid, performing hydrothermal synthesis, and taking out, washing and drying the product to obtain the high-strength hollow fiber zeolite membrane. The multi-channel hollow fiber support can provide high mechanical property, which greatly reduces the depreciation rate of the hollow fiber zeolite membrane equipment during use. Meanwhile, the multi-channel hollow fiber zeolite membrane prepared by the Invention possesses high loading density of permeation flux and membrane module and can reduce the production cost and improve the separation efficiency significantly, and thus lays the foundation for promoting the industrial application of the hollow fiber zeolite membrane.

The invention discloses a novel reactive compensation and harmonic suppression device, and the device comprises a passive filter which consists of a fifth-order single-tuned passive filter, a seventh-order single-tuned passive filter and an eleventh-order single-tuned passive filter, wherein the fifth-order single-tuned passive filter, the seventh-order single-tuned passive filter and the eleventh-order single-tuned passive filter are connected in a star shape. The device also comprises a zero sequence power active filter, a hybrid power active filter which filters second-order and fourth-order harmonic waves, an IGBT drive circuit, and a DSP control circuit. The DSP control circuit includes a DSP digital signal processor, an FPGA programmable logic device, an external ADC converter, and aphase locked loop circuit. The passive filter is connected to three phase a, c and c of a low-voltage side of a distribution transformer. The hybrid power active filter is formed by the cascading ofa passive part and an active part. The device achieves the extraction of second-order and fourth-order harmonic current signals from a nonlinear load, enables the second-order and fourth-order harmonic current signals to serve as the control signals of the power active filter, thereby achieving the effective control of the power active filter, and effectively filtering the second-order and fourth-order harmonic currents.

The invention provides a coal seam in-situ pyrolysis method. The coal seam in-situ pyrolysis method comprises the steps that a water injection well/extraction well which takes an ignition well as thecenter and is distributed in a regular polygon state is arranged for well drilling; and oxygen-enriched air is injected into the ignition well, ignition is conducted, the ignition well with the higherfluid pressure serves as the extraction well to conduct pyrolysis product extraction operation according to the fluid pressure under the water injection well/extraction well close to the ignition well. According to the coal seam in-situ pyrolysis method, the combustion direction of the coal seam in the combustion well is controlled through the water injection amount of the water injection well, the ignition well and the water injection well are distributed in a regular polygon shape, the water injection well and the extraction well can be switched in real time, directional perforation is conducted on the coal seam in the water injection well/extraction well, the combustion direction can be effectively controlled, injection of external heat-carrying fluid is not needed, therefore efficientconversion of underground coal resources and extraction of oil and gas resources can be realized, and the method has the advantages of simplicity and feasibility.

The invention relates to an electric pencil sharpener which comprises a machine shell and a pencil sharpening mechanism arranged in the machine shell. The pencil sharpening mechanism comprises a cutter frame, a hobbing cutter, a work hole and a transmission assembly. A first transmission part in the transmission assembly can abut against one end of a push block, and the other end of the push blockabuts against a pencil point of a pencil. A second transmission part in the transmission assembly can abut against one end of a cutter shaft, and the first transmission part and the second transmission part are in linkage. During pencil sharpening, the pencil point pushes the push block, the push block pushes the first transmission part, the first transmission part drives the second transmissionpart and enables the second transmission part to push the cutter shaft, and then the cutter shaft moves in the direction away from the second transmission part; an elastic reset part is stressed tillthe cutter shaft is located on a cutter seat through a locating structure, the cutter shaft is located, the hobbing cutter is separated from the cutter shaft, and therefore effective cutter separationis achieved; and the sharpness of a pencil lead is effectively controlled, and the situation that sharpening is excessive or the sharpness is not enough is avoided.

The present invention provides a method and an apparatus for fracturing polycrystalline silicon, and the method comprises steps of placing the polycrystalline silicon in a water tank containing water; applying an instant high voltage to the water tank so that high-voltage discharge occurs in the water of the water tank to fracture the polycrystalline silicon. The apparatus comprises a high-voltage transformer (B), a high-voltage rectifier (G), a charging capacitor (C), a disconnecting switch (K), a water tank (F) containing water, and a first electrode (1) and a second electrode (2) which are submerged in the water tank (F), the first electrode and the second electrode being disposed with a certain distance therebetween, wherein a primary winding of the high-voltage transformer (B) is connected to mains supply, a first terminal of a secondary winding of the high-voltage transformer is sequentially connected to the high-voltage rectifier (G), the disconnecting switch (K) and the first electrodes (1), a second terminal of the secondary winding is grounded and connected to the second electrode (2), and the charging capacitor (C) is connected between a common terminal of the high-voltage rectifier (G) and the disconnecting switch (K) and a common terminal of the secondary winding and the second electrode (2). The method and apparatus have advantages of simple process, uniform fragments and no metal contamination.

The present invention provides reliability testing method and device of an industrial robot and relates to the technical field of industrial control. The reliability testing method of the industrial robot comprises the following steps: firstly, the industrial robot starts to move after receiving a track testing signal sent by a controller, wherein the industrial robot is arranged in a walk-in laboratory; secondly, a laser tracker sends a track capturing signal to the industrial robot, wherein the laser tracker is arranged in a heat-insulating transparent container and the heat-insulating transparent container is also arranged in the walk-in laboratory; and the laser tracker receives a track returning signal reflected by the industrial robot and calculates the track accuracy of the industrial robot according to the track returning signal. Through the processing steps, the movement precision of the industrial robot is effectively tested and the operation reliability of the industry robot is guaranteed.

The invention discloses an electric horizontal rolled clamp and a using method thereof. The electric horizontal rolled clamp comprises a hanging beam, a hanging shaft device is arranged in the middle of the hanging beam, clamp arms are arranged on the two sides of the lower portion of the hanging beam correspondingly, a gear motor is arranged on the upper surface of the hanging beam, the bottom of the hanging beam is open, telescopic beams are arranged on the front side and the rear side inside the hanging beam correspondingly, a rack is transversely arranged on the inner side surface of each telescopic beam, the output end of the gear motor is connected to a transmission mechanism, the transmission mechanism comprises an output shaft, a gear meshing with the two racks at the same time is installed at the end part of the output shaft, each clamp arm is fixedly connected to one telescopic beam, the whole clamp arm is of a long-strip-shaped frame structure, a rectangular opening is formed in the lower portion of each clamp arm, a clamp claw assembly is movably arranged in the opening, guide frames capable of moving up and down on the outer sides of the clamp arms are arranged on the outer sides of the clamp arms, and guide rail connecting rod mechanisms are movably arranged between the guide frames and the corresponding ends of the hanging beam. By means of the electric horizontal rolled clamp, the problem that the electric horizontal rolled clamp collides or rubs steel coils can be effectively solved, the steel coil yield is increased, the equipment failure rate is reduced, and the equipment maintenance cost is reduced.

The embodiment of the invention provides an accelerator pedal dead zone control method and device, a controller and a vehicle. The method comprises the following steps of acquiring an initial accelerator pedal range; adjusting the initial accelerator pedal range according to the preset empty pedaling amount of an accelerator pedal, and determining an adjusted pedal range corresponding to the accelerator pedal; determining a hysteresis range and an advance range of the accelerator pedal according to the initial accelerator pedal range and the adjusted pedal range; and controlling the opening degree of the accelerator pedal according to the hysteresis range and the advance range of the accelerator pedal. According to the method of the embodiment, the problem that the accelerator pedal cannotbe effectively controlled in the prior art can be solved, and the safety is further improved.

The invention relates to the technical field of intelligent household electrical appliances, and discloses a household electrical appliance control method which comprises the following steps that: a server obtains a user information base in which pre-stored action information of a user associated with at least one wearable device is stored, wherein the pre-stored action information comprises identification information of pre-stored actions, acceleration data and myocurrent data corresponding to the pre-stored actions, and identification information and controllable operation modes of controllable household appliances associated with the pre-stored actions; a target user is determined, and according to target acceleration data and target muscle current data collected by a target wearable device associated with the target user, a target action of the target user and identification information and a target operation mode of a target household appliance associated with the target action are obtained from the user information base by means of matching; and the target household appliance is controlled to operate in the target operation mode. In this way, effective control of the target household electrical appliance can be realized, and the user experience is improved. The invention further discloses a household appliance control system and a wearable device.

The invention discloses an ammonium lignin sulphonate compound dust-proof agent and an application thereof. The ammonium lignin sulphonate compound dust-proof agent is prepared by compounding 25%-75% of ammonium lignin sulphonate, 5-15% of ethylene glycol and the balance of water by weight. The working concentration of the ammonium lignin sulphonate compound dust-proof agent is 0.1-10%. The using steps of the ammonium lignin sulphonate compound dust-proof agent are as follows: (1) preparing the ammonium lignin sulphonate compound dust-proof agent; (2) diluting the prepared ammonium lignin sulphonate compound dust-proof agent till meeting the working concentration; (3) spraying the diluted ammonium lignin sulphonate compound dust-proof agent on the surfaces of dust material particles through a high-pressure spray gun. The dust removal effect of the ammonium lignin sulphonate compound dust-proof agent disclosed by the invention can reach above 80%; as the air loss is obviously reduced in a dust source conveying process, the air quality of a dust source location is greatly improved, and the economic loss is reduced.

The invention provides a method for detecting the quality of a vinegar myrrh standard decoction, which comprises the following steps of: determining the characters of the vinegar myrrh standard decoction, the extract yield of dry extract, thin-layer identification, extract, specific chromatogram and curdione content, and limiting the content standard of the vinegar myrrh standard decoction to be 1.0-4.1 mg of curdione per 1g, determining the extract yield of the dry extract by adopting a decoction method; thin-layer chromatography is adopted for thin-layer identification; determining the extract by adopting a hot dipping method; the specific chromatogram and the curdione content are determined by liquid chromatography. According to the method for detecting the quality of the vinegar myrrh standard decoction, the quality of the vinegar myrrh standard decoction is evaluated through multi-aspect measurement, a solid foundation is laid for stable product quality, a feasible quality standard of the vinegar myrrh decoction can be established, and effective control over the quality of the vinegar myrrh standard decoction is achieved.

The invention provides a preparation method of butadiene styrene rubber. The preparation method comprises the following step: carrying out a copolymerization reaction on styrene and butadiene in a hydrocarbon solvent to obtain solution polymerized styrene-butadiene rubber by taking organic lithium as an initiator and tetrahydrofurfuryl alcohol alkyl ether and tetrahydrofuran as a structural regulator, wherein the molar ratio of tetrahydrofurfuryl alcohol alkyl ether and organic lithium is (1-4): 1 and the molar ratio of tetrahydrofuran and organic lithium is greater than 40: 1. Vinyl-based solution polymerized styrene-butadiene rubber in random high styrene is prepared by means of the preparation method, so that the service performance of butadiene styrene rubber is improved. By adopting the preparation method, the raw materials are easily available, and the tetrahydrofuran regulator in industrial production can be recycled with the hydrocarbon solvent, so that the production cost is lowered greatly.

The invention provides a controller, system and method of a permanent magnet circuit breaker, relates to the technical field of circuit breaker control, and can achieve effective control on the permanent magnet circuit breaker and adapt to an intelligent development trend. The controller comprises a power module, an executive module, a control module and a communication module; the power module, the executive module and the communication module are connected with the control module, and the power module is connected with the executive module; the power module is used for providing working power supply for the executive module and the control module; the executive module comprises an energy storage capacitor module and a breaking-closing output module, the energy storage capacitor module is connected with the breaking-closing output module, the breaking-closing output module is used for controlling a mechanism coil of the permanent magnet circuit breaker, and the energy storage capacitor module is connected with the control module; the control module is a microprocessor which has a programming function and is used for conducting collection and processing on data; the communication module is used for providing a communication transmission channel where the control module and an upper computer exchange information and instructions.

The invention discloses a print frequency control method, which comprises the following steps: A. setting the threshold value of CPU occupation rate at the print information output time; obtaining the occupation rate of present system CPU; B. judging whether the occupation rate of present system CPU exceeds the threshold value; stopping outputting the print information if yes; outputting the print information if not. The invention improves the system stability when the occupation rate of present system CPU is high, which guarantees the system stability.

The invention provides a smart home system, comprising an environment monitoring system, a security and protection monitoring system, a home gateway, a control terminal and a home terminal, wherein the environmental monitoring system and the security and protection monitoring system are in communication connection with the home gateway, the environmental monitoring system collects indoor environmental information by using a sensor, the security and protection monitoring system is used for detecting an indoor foreground target and generating monitoring information, the smart home gateway sendsthe collected environmental information and the monitoring information to the control terminal, and the control terminal controls the home terminal based on the environmental information and the monitoring information. The smart home system provided by the invention has the beneficial effects of realizing environmental monitoring, security and protection monitoring and effective control of the smart home.