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 present invention relates to a gas constant-flow output feedforward control system, which comprises a gas storage tank, an operation station, a PLC controller, a regulating valve, a stop valve and a pressure sensor, wherein the pressure sensor is arranged inside the gas storage tank, the output pipeline of the gas storage tank is sequentially provided with the regulating valve and the stop valve, and the PLC controller is connected with the operation station, the gas storage tank and the regulating valve. The method comprises that: the PLC controller detects the initial tank pressure and the temperature of the gas storage tank, and controls the regulating valve according to the control information transmitted by the operation station, and the PLC controller controls the stop valve to close when the gas output is not required. According to the present invention, the structure is simple, the control method is relatively simple and easy to perform, and the gas with the constant mol / s-grade flow can be output.

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.

The invention relates to an adjustable power supply of an integrated circuit test board and the integrated circuit test board. The adjustable power supply of the integrated circuit test board comprises a controller and at least two power supply modules, wherein the at least two power supply modules are connected in series on an output end of the controller in a daisy chain topological structure, the power supply module comprises an adjusting assembly, a first DCDC power supply and a second DCDC power supply, an input end of the adjusting assembly is electrically connected with the output end of the controller, a first output end of the adjusting assembly is electrically connected with the feedback input end of the first DCDC power supply, a second output end of the adjusting assembly is electrically connected with the feedback input end of the second DCDC power supply, the adjusting assembly is used for adjusting the output voltage of the first DCDC power supply and the output voltageof the second DCDC power supply according to the control signals outputted by the controller. According to the adjustable power supply, a problem that the output of the power supply voltage of the integrated circuit test board is unstable in the prior art is solved, and the technical effect of ensuring the stable output of the adjustable power supply voltage of the integrated circuit test board isrealized.

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 the technical field of IoT (Internet of Things) and illumination, and discloses a rear-mounted LED dimming control device. The rear-mounted LED dimming control device comprises a rear-mounted LED dimming control device; and a wide-voltage DC (Direct Current) power supply interface is fixedly mounted outside the left side of the rear-mounted LED dimming control device. Therear-mounted LED dimming control device and method, by a built-in backup power supply management module, solve a problem of unstable output of 0 to 10V, which is caused by conversion of a DC voltage output by a LED power supply in the 0-10V dimming process, avoid lamp flicker caused by feedback in the dimming process, have an input and output voltage and current sampling function, and can completeload detection of a LED lamp; in the dimming process of the LED lamp, a wide voltage output by a power supply under the drive of the LED lamp can be changed; and in the changing process, an independent power supply system in a dimming control feedback module can ensure that a signal output in the dimming process is stable and cannot be changed along with conversion of the power supply voltage, soas to avoid a stroboflash problem in the dimming process.

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 discloses a coil winding framework and a high-frequency resonance transformer special for a plate-type ozone generator, the coil winding framework comprises a framework body, the upper end and the lower end of the framework body are both provided with insulating interlayers of a coil to a magnetic core, and the middle of the framework body is provided with a plurality of coil interlayer insulating interlayers; a plurality of coil winding guide grooves are formed in the middle of the framework body; the high-frequency resonance transformer special for the plate type ozone generator comprises a magnetic core, the left end of the magnetic core is sleeved with a primary coil winding framework, the right end of the magnetic core is sleeved with a secondary coil winding framework, and the structures of the primary coil winding framework and the secondary coil winding framework are consistent with those of the coil winding frameworks. The coil winding framework and the high-frequency resonance transformer special for the plate type ozone generator can solve the problems that an existing transformer is serious in heating, leakage inductance disturbance and high in failure rate, and therefore the purposes that heating is reduced, stability is achieved, component assembling is achieved, the technology is simple, large-scale production is easy to achieve, and it is guaranteed that parameters of the transformer are consistent are achieved.

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 belongs to the technical field of electric locomotive traction control, and specifically relates to a control strategy and a modulation method for a four-quadrant converter of a direct-drive permanent magnet electric locomotive. The present invention adopts a double-closed-loop control strategy with intermediate DC bus voltage feedforward, the outer loop is a voltage control loop, and a PI controller is used to control the DC bus voltage; the inner loop is a current control loop, and a PR controller is used to control the AC side current control; when the DC bus voltage exceeds the set threshold, the DC bus feed-forward amount is directly given to solve the problem of unstable output of the PI controller due to bus oscillation; the modulation adopts the SHEPWM strategy, and the present invention is in the SHEPWM pulse generation process Among them, the comparison value method is adopted, compared with the traditional forced method, it can effectively reduce the switching angle action delay, realize SHEPWM pulse generation with high precision, effectively eliminate specific harmonics, and reduce the low-order harmonic content of the network measurement current .

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 discloses a video signal same frequency interference rejection device of an electro-optical stabilized sight product, and belongs to the technical field of electromagnetic compatibility. The device comprises a CPU, a power source gating device and a video gating device. A data port of the CPU is connected with the power source gating device and the video gating device. The power source input ends of three CCDs are connected with the power source gating device, and the output ends of the three CCDs are connected with the video gating device. When the CPU receives a view field switching order, the CCD to be switched is powered on through the power source gating device, when delayed time is up, the video gating device is controlled to gate the output of the CCD to be switched, and the CCD which works at present is controlled to be powered off. The same frequency interference problem of the three CCDs is radically solved, the electromagnetic compatibility of an electro-optical stabilized sight system is improved, and meanwhile the video signal same frequency interference rejection device has the advantages of being clear in video displaying effect and stable in output.

The invention discloses a control signal generation circuit. The control signal generation circuit is characterized by comprising a signal superposition unit, a switch unit, a comparator and a controller, wherein the output end of the switch unit is connected with the input end of the signal superposition unit; and the signal superposition unit superposes a preprocessed to-be-detected current signal and a first adjusting signal transmitted by the switch unit and then outputs a first comprehensive signal, or superposes the preprocessed to-be-detected current signal with a second adjusting signal transmitted by the switch unit and then outputs a second comprehensive signal. By using the circuit provided in the above scheme, the problems that peak detection voltage is easily interfered by noise and power supply output is unstable because current detection resistance is too small are solved; secondly, since the resistance value of a used current detection resistor is relatively small, the working efficiency of the power supply is improved; and in addition, all compensation function modules are gathered together, so a circuit structure is simplified.

The invention discloses an anti-interference filtering device for a grounding ring current. The device comprises a grounding ring current monitoring mutual inductor and a concentrated data collector; an anti-interference filtering interface is arranged between the grounding ring current monitoring mutual inductor and the concentrated data collector; an output end of the grounding ring current monitoring mutual inductor is connected with an input end of the anti-interference filtering interface, and an output end of the anti-interference filtering interface is connected with an input end of the concentrated data collector. The device can help solve a problem that the grounding ring current monitoring mutual inductor is instable in output, stable output of the concentrated data collector can be realized, grounding current signals can be accurately restored, and precision of a whole monitoring system can be improved.

The invention belongs to the technical field of engines, and in particular relates to a method and a control system for controlling the fuel injection quantity in a cylinder cut-off mode. According to the quantity and the distance between the continuous fuel injection cylinders behind the cut-off cylinders and the distance between the cut-off cylinders in the cycle, the compensation coefficient of the fuel injection quantity of the engine is determined according to the quantity and the distance, and the fuel injection quantity of the fuel injection cylinder is calculated according to the compensation coefficient, according to the present invention The method of controlling the fuel injection volume in the deactivated cylinder mode, after compensating the fuel injection volume of the fuel injection cylinder in the engine running in the deactivated cylinder mode, reduces the uneven interval between the fuel injection cylinders and continuous fuel depletion caused by the deactivated cylinder. The fluctuation difference of the torque change caused by the situation improves the stability of the torque output.

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.

The embodiment of the invention discloses a clutch pressure determination method, device, vehicle and storage medium. The method includes: when the clutch is in an oil-filled working condition, acquiring the current current value of the pressure control solenoid valve at the current collection time; if the clutch pressure sensor is in a failure state at the current collection time, then collecting The historical collection values ​​at each historical collection time are aggregated at time to determine the current pressure value of the actuation oil circuit in the clutch at the current collection time. According to the technical solution of the embodiment of the present invention, the pressure of the execution oil circuit in the failure state is estimated according to the parameters calculated by the clutch pressure sensor in the normal state, and the oil pressure control signal output of the transmission controller is solved when the wet clutch pressure sensor fails in the oil filling condition. The problem of instability improves the safety of the vehicle during driving.