39results about How to "Solve the unstable output" patented technology

The invention provides a device for generating hydrogen by electrolyzing water by using a solar thermophotovoltaic system and belongs to the technical field of solar utilization and hydrogen production by electrolysis. The device consists of two main parts: an improved solar thermophotovoltaic system and a water electrolysis-based hydrogen generation system. The improved solar thermophotovoltaic system has higher conversion efficiency and high output power than a system based on common photovoltaic technology and can provide sufficient current power supply for a water electrolysis-based hydrogen generation device. The device uses the power generated by the system in hydrogen generation by electrolysis, the hydrogen is stored, and thus, the problem that the output of the photovoltaic power generator varies with the change of weather and the alternation of day and night. In addition, the cooling of a photovoltaic cell in the device is liquid cooling, the aqueous solution for electrolysis is preheated before being introduced into an electrolytic cell, the power consumption in an electrolysis process is reduced, and thus, the solar utilization rate is further improved.

The invention discloses a taste maintenance method for an ice cream machine. The ice cream machine is provided with a freezing cylinder, a stirring device, a main refrigeration system and a control system. When ice cream materials in the freezing cylinder stay in a forming solid state stage, the control system controls the ice cream machine to stay in a taste maintaining state, wherein the formingsolid state stage refers to the stage when all the ice cream materials in the freezing cylinder are converted into all-solid-state ice creams until the preset hardness or a preset viscosity value isreached; the taste maintaining state refers to the state in which the main refrigeration system conducts refrigeration on the ice cream materials in the freezing cylinder at a refrigerating capacity approximate to a lower limit refrigerating capacity; moreover, the ice cream machine can discharge the all-solid-state ice creams in the freezing cylinder in the taste maintaining state. According to the taste maintenance method for the ice cream machine, the time for the ice creams in the freezing cylinder to stay in the forming solid state stage can be prolonged so that the ice creams in the freezing cylinder can maintain a better taste state for a longer period of time, and that is to say that the hardness or the viscosity and the expansion ratio are high.

A display device of the invention includes horizontal lines, longitudinal lines, electron emission elements, and a scanning circuit which performs the selection of the horizontal lines. The scanning circuit includes a non-selection voltage switch, a correction selection voltage switch, and an output voltage detection switch for the selected horizontal line for every horizontal line. The display device also includes a differential amplifier which is connected to a correction selection voltage input line, a horizontal line selection voltage line, and a correction selection voltage output line for every plurality of horizontal lines. The invention can suppress a voltage drop of the horizontal lines and, at the same time, can suppress the brightness irregularities of the display device.

The invention discloses a gypsum board preparation system with an elastic port discharge device. The system comprises a feed spiral cutter, a discharge device, a scraping device, a vibration and beating motor, a mixer and a plate manufacturing line. The discharge device comprises a chute, an upper flange, a lower flange and a screw rod. The left end of the feed spiral cutter is provided with a discharge port. The discharge port is embedded in the chute. The outer wall of the discharge port is attached to the inner wall of the chute. The upper flange is arranged in the portion, tangent to the discharge port, of a chute inlet. The lower flange is arranged in the portion, tangent to the discharge port, of the chute inlet. The upper flange and the lower flange are connected through the screw rod. The vibration and beating motor is arranged on the outer wall of the chute. The screw rod is sleeved with a spring capable of buffering vibration of the vibration and beating motor. The gypsum board preparation system is provided with the elastic port discharge device can guarantee normal operation of the vibration and beating motor and is smooth in discharge. Moreover, the service life of the chute can be prolonged. Industrial production of gypsum boards can be realized.

The invention relates to a continuous flow production control method, device and system for a microreactor. The method includes the steps: detecting the components of reaction raw materials and the corresponding component content data of all the components; simulating a reaction process, and determining simulated reaction products; analyzing the component data of the simulated reaction products and the corresponding simulated component content data of the simulated reaction product components, and determining first analysis data; collecting the component data of real reaction products and thecorresponding content data of the real reaction product components, and determining second analysis data; carrying out comparative analysis of the first analysis data with the second analysis data, and determining first comparative analysis result data; and if the first analysis data and the second analysis data are changed, adjusting the reaction conditions and/or reaction raw material proportionaccording to the first comparative analysis result data, determining a control scheme and controlling the microreactor to produce the target product. The method or device or system can monitor and analyze the reaction process in real time and adjust the reaction raw material proportion and/or reaction conditions in real time.

The embodiment of the invention provides a shift register and a driving method thereof, a grid driving circuit and a display device, relates to the technical field of display, and can solve the problem of unstable output caused by insufficient potential of a pull-down node in the shift register. The shift register comprises a pull-up node, a pull-down node and a pull-down coupling sub-circuit, Thepull-down coupling sub-circuit is connected with the pull-down node, the first scanning end and the second scanning end; And the pull-down coupling sub-circuit is configured to perform coupling lifting on the voltage of the pull-down node under the control of signals of the first scanning end and the second scanning end.

The invention discloses a valley filling and stroboflash-free PFC converter and a control method, and the valley filling and stroboflash-free PFC converter is characterized in that the valley filling and stroboflash-free PFC converter comprises a PFC unit, the PFC unit is provided with an energy storage capacitor and at least one switching tube, the PFC unit is electrically connected in front of a fluctuation circuit or a converter, and the PFC unit is charged through a bus input end and/or winding flyback; the PFC unit is matched with other circuits to be combined with a corresponding control method, peak energy is stored in the PFC unit at a certain moment to increase the PF value, and the PFC unit conducts releasing and valley filling according to needs to prevent output fluctuation; the PFC unit is controlled to carry out energy storage and release control through an internal switch tube and/or a diode, and when a PFC module is added between windings, the energy storage capacitor in the PFC unit can be controlled at a low voltage, and the withstand voltage of the PFC capacitor is reduced; stable output and no stroboflash are realized, internal used components are reduced, the overall size of the converter is further reduced, and the service life is prolonged at the same time.

The present invention discloses a method and a system for simulation of demagnetization sampling of switching power supply output sampling. The present invention provides a method for simulation of demagnetization sampling of switching power supply output sampling. The method comprises the steps of: discharging a switching power supply primary sampling peak voltage to perform simulation of demagnetization; determining a relation of the primary sampling peak voltage and demagnetization time; and at least partially based on the sampling peak voltage of the current period, the conduction time ofa power switch and discharge speed information of the last period, determining positions of sampling points.

The invention belongs to the technical field of engines, and particularly relates to a control method and a control system for oil injection quantity in a cylinder cut-off mode. The control method forthe oil injection quantity in the cylinder cut-off mode comprises the steps of controlling an engine to operate in the cylinder cut-off mode; the number of continuous oil injection cylinders behind an oil cut-off cylinder in the working period of an engine and the distance between the continuous oil injection cylinders and the oil cut-off cylinder are calculated, the compensation coefficient of the oil injection amount of the engine is determined according to the number and the distance, and the oil injection amount of the oil injection cylinders is calculated according to the compensation coefficient. After the oil injection amount of the oil injection cylinder in the engine running in the cylinder breaking mode is compensated, the torque change fluctuation difference caused by the situations of uneven intervals of the oil injection cylinder, continuous oil breaking and the like due to cylinder breaking is reduced, and the stability of torque output is improved.

The embodiment of the invention discloses a clutch pressure determination method and device, a vehicle and a storage medium. The method comprises the steps that when a clutch is in an oil charging working condition, a current current value of a pressure control electromagnetic valve at a current acquisition moment is acquired; and if a clutch pressure sensor at the current acquisition moment is ina failure state, a current pressure value of an execution oil path in the clutch at the current acquisition moment is determined according to the current current value and a historical acquisition value at each historical acquisition moment. According to the technical scheme of the embodiment, the pressure of the execution oil path in the failure state is estimated according to parameters calculated under the normal state of the clutch pressure sensor, so that the problem that output of an oil pressure control signal of a transmission controller is unstable when a wet clutch pressure sensor fails under the oil charging working condition is solved, and the safety in the running process of the vehicle is improved.

A parallel system based on a switching stabilized voltage supply and a switching stabilized current supply comprises a switching stabilized voltage supply circuit, a switching stabilized current supply circuit and a single-chip microcomputer control circuit. The switching stabilized current supply circuit adopts a series sampling method. The single-chip microcomputer control circuit has effects of comprehensive control of a supply system, human-machine interaction, and system work state detection. The parallel system based on a switching stabilized voltage supply and a switching stabilized current supply is powered by a switching stabilized voltage supply and an adjustable switching stabilized current supply parallel system, uses a method of prorating output current after connecting in parallel a voltage source and a current source at the output ends, solves a problem that a supply system is unstable in output after switching power supplies are connected in parallel. The power supply system is modular, large in capacity, high in efficiency and high in reliability.

The invention relates to a ferrograph making oil flow speed control system, belonging to the fluid drive filed. The system comprises a micro vacuum pump, a vacuum pump control circuit, a solenoid valve, a solenoid valve control circuit, a detection unit, an MCU unit and a host computer, wherein the micro vacuum pump is connected with the vacuum pump control circuit via the MCU unit, the solenoid valve is connected with the solenoid valve control circuit via the MCU unit, the detection unit is connected with both the solenoid valve and the MCU unit, and the MCU unit is connected with the host computer. When output of the micro vacuum pump fluctuates widely, the ferrograph making oil flow speed control system can make timely feedback, and adjust output of the micro vacuum pump and branches of the solenoid valve timely to decrease fluctuation and solve the problems of unstable output and high failure rate of an oil source.

The invention relates to a welding manipulator driving device, which belongs to the technical field of fluid braking devices. The welding manipulator driving device comprises an air cylinder, wherein the air cylinder is divided into a front cover, a cylinder body and a back cover, a piston cavity is formed in the cylinder body, a piston is installed in the piston cavity, a piston rod which is connected with the piston penetrates through the front cover, and a first air port is formed in the back cover. The welding manipulator driving device is characterized in that a hydraulic oil port which is communicated with the piston cavity is formed in the front cover, the hydraulic oil port is connected with the bottom of an oil tank outside the air cylinder through an oil inlet pipeline, and a speed regulating valve is installed on the oil inlet pipeline; hydraulic oil is contained in the oil tank, an air chamber is left in the upper part of the oil tank, and a second air port which is communicated with the air chamber is formed in the top of the oil tank. The welding manipulator driving device has the advantage of simple structure, only one oil tank needs to be arranged on the original air cylinder, and compared with an existing gas-liquid damping type air cylinder, the air cylinder is lower in the cost, but the problem of unstable output of the air cylinder can be solved.

The invention relates to the field of froth flotation automation, and discloses a flotation process fuzzy control method based on froth flow velocity. The method comprises the following steps: firstly, detecting flotation froth flow velocity by adopting an image processing method, respectively calculating set values of inflation pressure and froth layer thickness in the flotation process by adopting a fuzzy control method in combination with a flow velocity set value, and sending the set values to a PID controller; in order to enhance the adaptive capability of a fuzzy controller and meet the control requirements under various flow rate set values, a multi-input multi-output fuzzy control method for adaptive parameters according to the flow rate set values is provided, so that the foam flow rate tracking set value is better realized. According to the method, subjective uncertainty of manual adjustment of air pressure and foam layer thickness is overcome, the purpose of tracking the flow rate set value by the actual flow rate of foam is achieved, conditions are provided for subsequent grade and recovery rate regulation and control, and economic and technical indexes of the flotation process are improved.

The invention discloses an electronic control ammonia injection system. The electronic control ammonia injection system comprises an ammonia storage tank, a flow collecting device and a pressure regulating valve, wherein the ammonia storage tank is used for storing and releasing ammonia, the flow collecting device is communicated with the ammonia storage tank and an ammonia output pipe for metering throughput of ammonia; the pressure regulating valve is arranged on the pipe between the ammonia storage tank and the flow collecting device for controlling the output pressure of the ammonia storage tank. The output pipe of the ammonia storage tank is provided with the flow collecting device to acquire of the jet flow of ammonia, thereby achieving the aim of precise output; the output end of the ammonia storage tank is provided with the structure of the pressure regulating valve to control the output pressure of the ammonia storage tank within a preset range, thereby achieving the effect ofstable output, effectively ensuring precise control and measurement of the ammonia output of the subsequent output process, ensuring that the output ammonia can meet the practical demands of exhaustpurification and avoiding waste leakage or incomplete purification.

The invention discloses a reset device and method, a clock system and electronic equipment, and relates to the field of clock design. The reset device comprises a clock generation circuit, the outputend of the clock generation circuit is connected with the input end of a clock signal, the clock generation circuit is used for obtaining an asynchronous reset signal when it is detected that the system clock circuit does not output a first clock signal, the asynchronous reset signal is used for executing reset operation on the asynchronous reset time sequence circuit, and the first clock signal is used for executing reset operation on the synchronous reset circuit; and a second clock signal is generated according to the asynchronous reset signal, wherein the second clock signal is used for executing reset operation on the synchronous reset circuit. Therefore, when the system does not output the first clock signal to reset the synchronous reset circuit, the clock generation circuit can generate the second clock signal used for executing the reset operation on the synchronous reset circuit according to the asynchronous reset signal, and the situation that the synchronous reset circuit cannot be reset when the synchronous reset circuit does not receive the first clock signal is avoided.

The invention relates to a biological buffering bicarbonate tablet and a preparation method thereof. The preparation method comprises the following steps: (1) accurately weighing sodium carbonate, sodium bicarbonate, cross-linked amylose and sodium azide; (2) uniformly mixing the above components under stirring; (3) pressing the components into a tablet on a tablet press; and (4) carrying out weighing and testing to obtain qualified tablets, and then carrying out packaging; wherein the pressure of the tablet press is five tons. The round tablet prepared in the invention can be directly used immediately after opening of package, is simple to use, substantially mitigates labor intensity of users, saves working time and improves working efficiency; in usage, the tablet can be rapidly dissolved after addition into a solvent with a fixed volume, so a desired buffer solution with an accurate and stable pH value can be obtained; and the tablet is easy to preserve and transport, long in preservation time, simple and rapid to prepare and suitable for industrial processing.