112results about How to "For fast and precise control" patented technology

An integrated device for in-situ generation and decomposition of hydrate sediments and permeability measurement thereof belongs to the field of measuring the basic physical properties of natural gas hydrates. The device mainly comprises a reaction kettle, a cold store, a scavenging leakage detection system, a temperature control system, a gas supply system, a water supply system, a permeability measurement system and a computer data acquisition system. A compression type design is adopted for the reaction kettle so that different stress states can be simulated. The device has the following advantages that: the cold store and a constant temperature bath are capable of realizing quick and accurate control of temperatures; the gas supply system is quick and convenient to increase and preserve pressures; the data acquisition system has the functions of data storage and real-time analysis; the temperatures, pressures, historical sedimentary conditions and stress states of different hydratesediment reservoirs can be simulated; and a hydrate sediment sample can be integrally taken out in a relatively convenient manner, and can be directly put in a low-temperature high-pressure three-axis tester for the mechanical characteristic testing research. Besides, the device plays an important role in guiding the drilling and safe mining of natural gas hydrates.

A detection device of natural gas hydrate synthesis and decompose, belongs to the field of natural gas hydrate basic physical property measurement, comprising a reaction vessel, a temperature control groove, a refrigeratory, a natural gas distribution system, a natural gas supercharging system, a water supply system and a computer data acquisition system, wherein the temperature control groove, the supercharging system and the water supply system are arranged in the refrigeratory, the reaction vessel is arranged in the temperature control groove. The gas distribution system requires the component gas to enter the reaction vessel after supercharging by the supercharging system, the water supply system supplies water to the reaction vessel, the computer data acquisition system acquires detection data. The invention has the advantages that: the natural gas distribution system fast arranges each kind of mixed gas; the refrigeratory and a bath temperature control system realizes fast temperature control and accurate control; the natural gas supercharging system supercharges fast and conveniently; the data acquisition system has data storage, real time data and image analysis software support, which plays a guide role in reserve forecast and exploration of natural gas hydrate.

The present invention relates to a variable-torque magnetorheologically actuated prosthetic knee which utilizes a plurality of interspersed and alternating rotors and stators to shear magnetorheological fluid in gaps formed therebetween. Advantageously, by operating in the “shear mode” there is substantially no or negligible fluid pressure buildup or change. Moreover, the multiple MR fluid gaps or flux interfaces desirably allow for the production of a large torque at low speed—eliminating the need for a transmission—and also for a wide dynamic torque range. One embodiment of the invention allows the rotors and / or stators to close the gaps therebetween to create a frictional torque component, thereby forming a “hybrid” braking system which provides a total torque or damping which is a combination of viscous torque and frictional torque.

A method for using a downdraft gasifier comprising a housing and a refractory stack contained within the housing. The refractory stack may comprise various sections. Apertures in the sections may be aligned to form multiple columnar cavities. Each columnar cavity may comprise an individual oxidation zone. The method of use may include the steps of placing a feedstock into an upper portion of the refractory stack, measuring the temperature of each columnar cavity, and adjusting the flow of oxygen to a particular columnar cavity to maintain the temperature of the particular columnar cavity within a particular range.

A fluid-driven actuator system includes a fluid-driven actuator and at least one proportional control valve and at least one pump connected to the fluid-driven actuator to provide fluid to operate the fluid-driven actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The fluid-driven actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to adjust at least one of a flow in the fluid-driven system to a flow set point and a pressure in the fluid-driven actuator system to a pressure set point and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of the flow to the flow set point and the pressure to the pressure set point.

The invention discloses a prediction control method of a nickel-base super alloy microstructure on the basis of a BP (Back Propagation) neural network. The method comprises the following steps: (1) according to a historical die forging process parameter and the microstructure, carrying out off-line training on a prediction neural network model and a control neural network model; (2) utilizing the die forging process parameter to predict the microstructure of a next moment via the prediction neural network model; (3) carrying out feedback correction on the predicted microstructure, and planning a microstructure target value of the next moment; (4) according to the feedback correction value and the target value of the microstructure, giving the die forging process parameter of the current moment via the control neural network model; (5) according to a soft measurement microstructure, carrying out on-line feedback regulation on the prediction neural network model and the control neural network model; and (6) jumping to the step (2), and entering the prediction and the control of the nickel-base super alloy microstructure of the next moment. The method can quickly and accurately carry out on-line prediction and control on the nickel-base super alloy microstructure, and provides an effective technical means for realizing the high-quality forging of a nickel-base super alloy part.

A fluid-driven actuator system includes a fluid-driven actuator and at least one proportional control valve and at least one pump connected to the fluid-driven actuator to provide fluid to operate the fluid-driven actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The fluid driven actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to adjust at least one of a flow in the fluid system to a flow set point and a pressure in the fluid system to pressure set point and a concurrently establishes an opening of the at least one proportional control valve to adjust at least one of the flow to the flow set point and the pressure to the pressure set point.

A drive device for a hybrid vehicle, capable of quickly outputting, even during engine start operation, appropriate output torque to a motor in response to a request by accelerator operation or the like by a driver, and a control method for the drive device. The drive device for a hybrid vehicle comprises a motor, a clutch for making or interrupting transmission of drive force between the motor and an engine, and a control device for performing operation control of the motor and the clutch. Upon receiving an engine start request while wheels are driven by the motor, the control device increases a working pressure P1 of the clutch to start transmission of torque from the motor to the engine side, detects torque Tc transmitted through the clutch, and performs control in which output torque Tmg of the motor is the sum of the transmission torque Tc and wheel drive request torque Tth that is determined based on the accelerator opening.

A technique for distributing channel allocation information in a demand access communication system. In a preferred embodiment, for use with Code Division Multiple Access (CDMA) type communication, multiple access codes are used that have a defined code repeat period or code epoch. For each such epoch duration, a central controller, such as located at a base station in the case of operating a forward link, determines a schedule of assignment of traffic channels to active terminals for each epoch. For each terminal designated as active during the epoch, an active terminal unit identifier is assigned. For each terminal designated as active during the epoch, the base station assigns a list of active channels for such terminal unit. Prior to the start of each epoch, a channel set up message is sent on one of the forward link channels, such as a paging channel. The channel set up message indicates the terminal unit identifiers and the lists of active channels for epochs of the associated traffic channel(s) that are to follow. At the remote terminal unit, upon receiving a paging channel message, an active terminal identifier is determined from each paging channel message and compared to a previously assigned terminal identifier. On a predetermined subsequent epoch, the indicated active traffic channel, as indicated from the list of active traffic channels indicated by a received paging channel message, are then processed.

A fluid system includes a variable-speed and / or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and / or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump.

A fluid system includes a variable-speed and / or a variable-torque pump to pump a fluid, at least one proportional control valve assembly, an actuator that is operated by the fluid to control a load, and a controller that establishes a speed and / or torque of the pump and a position of the at least one proportional control valve assembly. The pump includes at least one fluid driver that provides fluid to the actuator, which can be, e.g., a fluid-actuated cylinder, a fluid-driven motor or another type of fluid-driven actuator that controls a load. Each fluid driver includes a prime mover and a fluid displacement assembly. The fluid displacement assembly can be driven by the prime mover such that fluid is transferred from the inlet port to the outlet port of the pump.

The invention discloses a hydraulic drive system for a forklift. The hydraulic drive system is characterized by comprising a brake device, a lift cylinder, a tilt cylinder, a steering cylinder, and agear pump and a hydraulic oil tank for supplying high pressure oil to the brake device, the lift cylinder, the tilt cylinder, and the steering cylinder; The drive system further comprises an oil inletvalve plate, a brake oil passage, a steering oil passage, a lift oil passage, and a return oil pipeline. When the drive system is working, the hydraulic oil of the gear pump is divided into two pathsby a priority valve in the oil inlet valve plate. One path controls steering and braking of the forklift body through the brake oil passage and the steering oil passage; and the other path is connected with the lift oil passage and a tilt oil passage, and controls lifting action and tilting action of a portal frame. Compared with the conventional hydraulic drive system, the hydraulic drive systemfor the forklift disclosed by the invention has lower manufacturing cost, is lighter and comfortable to operate, and improves production efficiency.

A photonic chip based on periodical poling and waveguides circuits in ferroelectric crystals, the method is based on the integration of waveguide circuits, periodical poling and electro-optic modulator (EOM). The chip is illustrated by FIG. 1. The waveguide circuits guide the photons and makes linear operations like the beam splitting, filtering etc. on the photons. The periodical poling enables the efficient spontaneous parametric down conversion (SPDC), resulting the generation of entangled photons. The EOM controls the phase of photons dynamically. The following directional coupler distributes the entangled photons and the quantum interference takes place, resulting different types of path-entangled states by controlling the voltage of EOM insides the chip.

The invention discloses a novel throttle valve. The novel throttle valve comprises a driver, a valve cover, a valve rod, a valve body, a valve core and a valve base, wherein the lower part of the driver is connected with the valve cover; the valve cover is connected with the upper end surface of the valve body; the lower end of a lead screw of the driver is connected with the valve rod; the lower part of the valve rod is connected with the valve core; an axial hole way is formed in the upper part of the valve body; an anti-rotating cylinder is inserted in the hole way, and is peripherally locked with the valve body; the valve core is inserted in the anti-rotating cylinder, is peripherally locked with the anti-rotating cylinder, and axially fits the anti-rotating cylinder in a sealing slide manner; an inlet hole way and an outlet hole way are respectively formed in the side surface and the lower part of the valve body in the axial direction; the valve base is mounted in the outlet hole way, and axially fits the valve core at the upper side in an inserting manner; the upper part of the valve core is cylindrical; and two throttle inclined surfaces are symmetrically arranged at the lower end of the valve core, and take the shape of V. The throttle valve has the advantages of strong washout resistance, flow capacity and blockage resistance, quick valve position switch, small driver operation force, total cutoff in the closing of the valve core and adaptability to precise pressure control.

The invention relates to a method for controlling position of a pinch roll at a finish rolling inlet of a hot continuous rolling device. The method comprises deciding to adopt a linear control method and a non-linear control method according to different position deviations at two sides of a pinch roll during pinch roll gap control, determining an entry switching point between linear control and non-linear control according to the curvature of a curve in the non-linear control process and the straight slop in the linear control process through combination of linear control and non-linear control, to precisely control position deviations, and implementing uninterrupted high precision position control according to combination of characteristics of the two control methods during control to meet demands of the whole automatic positioning control. By adopting the method for controlling the position of the pinch roll at the finish rolling inlet of the hot continuous rolling device, the problem that the efficiency of a manual control method and the control precision are low can be solved.

The present invention relates to temperature control. The temperature control method is to adopt electric heater or circular water cooler to control temperature of heat accumulating oil tank, to adopt thermocouple temperature sensor to detect temperature of heat accumulating oil tank and to control temperature of temperature controlling board circularly. Altering the direction of current in semiconductor thermoelectric refrigerating device can realize heating or cooling of the temperature controlling board. The circular temperature controlling device consists of electric heater, heat accumulating oil tank, circular water cooler and thermocouple, and may have also heat conducting temperature controlling board, semiconductor thermoelectric refrigerating device, platinum resistive temperature sensor, heat conducting silicon resin rubber and heat isolating material. The present invention can lower power consumption, save power, control temperature fast and precisely.

A device for the controlled filling of containers with powdered substance includes a supply vessel with a narrow exit opening for temporarily holding the powdered substance and for discharging a predetermined quantity of the powdered substance into a container located underneath the supply vessel, a vibrator means is connected to the supply vessel for effecting the discharge of the powdered substance. A sensor for determining the quantity of powdered substance discharged from the supply vessel into the container, and a control unit, which converts the data acquired by the sensor into control commands for the vibrator means is included. The sensor includes a capacitive sensor for the quantitative determination of the quantity of powdered substance falling there through during the filling process and is located between the supply vessel and the container.

Equipment for preparing electronic grade nitric acid having a concentration of 68% from industrial grade nitric acid having a concentration of 98% is disclosed. The equipment comprises a rectifying tower provided with heating coils made of metal tantalum. The rectifying tower is filled with a glass raschig ring filling material. The diameter of the rectifying tower is 180-250 mm and the height of the rectifying tower is 5-10 m. A process for preparing the electronic grade nitric acid having a concentration of 68% from the industrial grade nitric acid having a concentration of 98% is also disclosed. The diameter of the rectifying tower is set to be 180-250 mm, the height of the rectifying tower is set to be 5-10 m, the reflux ratio is controlled to be 1:2-1:5, the heating coils in the rectifying tower are made of the metal tantalum, and the rectifying tower is filled with the glass raschig ring filling material. According to the equipment and the process, a finished high-purity product of the electronic grade nitric acid can be prepared by one time of distillation, thus saving resources and reducing pollution.

The invention provides a control method and device for air-sucking / blowing of a structure around a flow field. The device comprises a vacuum pump, an air pump, an air storage tank, an electromagnetic reversing valve, a vacuum filter, a precise pressure-reducing valve, a vacuum pressure-reducing valve, an air-blowing / sucking airflow main pipeline, a flow meter and a throttle valve, wherein the air storage tank is respectively connected with a ball valve A, a ball valve B and the electromagnetic reversing valve; the electromagnetic reversing valve is respectively connected with the vacuum filter and a common filter; the vacuum filter is connected with the vacuum pressure-reducing valve; and the vacuum pressure-reducing valve is connected with the air-blowing / sucking airflow main pipeline. In the invention, an action effect of an air-blowing / sucking airflow control structure under a natural incoming flow air field is utilized to design and arrange an air-sucking / blowing device in advance, a relation of the air speed of the incoming flow and the flow of the air-sucking / blowing device is designed and preset, and the flow of the air-sucking / blowing device is controlled by comparing the monitored air speed of the incoming flow with the preset air speed of the incoming flow. The device provided by the invention is capable of improving a wind-induced feature of the structure and increasing the wind-induced stability of the structure and is used for wind tunnel test research for various models, such as super high-rise buildings, large span bridges, oceanographic engineering structures, and the like.

The invention discloses an integrated type drive-by-wire hydraulic braking system and an ABS control method thereof. According to the method, based on double closed-loops formed by the slip rate and the braking torque, a layered control framework comprising upper layer control, middle layer control and bottom layer control is adopted, the deviation between the current slip rate and the expected slip rate of an automobile is used as a control variable, the wheel cylinder target pressure is calculated, and the braking wheel cylinder pressure is adjusted. The system is high in control accuracy, high in response speed and capable of being easily integrated to other control functions.

The invention discloses a high-speed and high-precision all-fiber polarization control device which relates to the technical field of fiber polarization control, in particular relating to a device for realizing light polarization control through phase modulation, and aiming at designing a high-speed and high-precision all-fiber polarization control device which has the advantages of small volume, simple structure, strong anti-interference performance and easiness for realization. In the scheme, a main light path is formed by connecting a light source, a four-port light polarization beam splitter / combiner, a phase modulator and a 90-degree rotation Faraday reflection mirror. The output end of the light source is connected with the input end of the four-port light polarization beam splitter / combiner, the reflection port of the four-port light polarization beam splitter / combiner is sequentially connected with the phase modulator and the 90-degree rotation Faraday reflection mirror to form a control arm, and the transmission output end of the four-port light polarization beam splitter / combiner is connected with the 90-degree rotation Faraday reflection mirror to form a reference arm. The optical path of the control arm is strictly equal to that of the reference arm, and the control on the light polarization is realized by modulating the phase difference of the control arm and the reference arm through utilizing the phase modulator. Through combining the four-port light polarization beam splitter / combiner with the 90-degree rotation Faraday reflection mirror, the birefrigent effect of optical devices and fibers can be eliminated, and the stability and anti-interference capability of the system can be enhanced, and the high-speed phase modulator guarantees that the working frequency of the device reaches 109Hz.

A method for using a downdraft gasifier comprising a housing and a refractory stack contained within the housing. The refractory stack may comprise various sections. Apertures in the sections may be aligned to form multiple columnar cavities. Each columnar cavity may comprise an individual oxidation zone. The method of use may include the steps of placing a feedstock into an upper portion of the refractory stack, measuring the temperature of each columnar cavity, and adjusting the flow of oxygen to a particular columnar cavity to maintain the temperature of the particular columnar cavity within a particular range.

The invention discloses a fuel cell air humidity adjusting system and a control method thereof, and the control method comprises the steps: collecting the operation data of an electric pile cathode, obtaining the actual air humidity RH at an inlet, processing the operation data to obtain the target air humidity RH0 at the inlet under the current working condition, and calculating the difference value delta(RH) when RH is greater than RH0, and adjusting the air humidity of the cathode inlet of the electric pile through combined control according to the delta RH; the combined control comprises the steps of controlling a pressure release valve capable of bypassing the fresh air part entering the humidifier to the mixed discharge device, controlling an inlet humidity regulating valve capable of bypassing the fresh air part entering the humidifier to the cathode inlet of the electric pile, controlling an outlet humidity regulating valve capable of bypassing the waste air entering the humidifier to the mixed discharge device, and controlling an air compressor. Through combined adjustment of the inlet humidity adjusting valve, the outlet humidity adjusting valve, the air compressor and the back pressure valve, the air humidity of an electric pile inlet is accurately controlled, and meanwhile the electric pile humidity response rate under the dynamic working condition is increased.

Disclosed is an apparatus for controlling a duty ratio of a signal that includes a clock control unit configured to generate a plurality of control signals based on an input signal, a half-cycle generation unit configured to generate a multiplied signal by use of the input signal and a delay signal that is obtained by delaying the input signal based on a delay control voltage, and divide the multiplied signal to generate a first division signal and a second division signal that are in inverse relation to each other, a comparator unit configured to compare a pulse width of the first division signal with a pulse width of the second division signal based on the control signal provided by the clock control unit, and output a delay control signal corresponding to a result of the comparison, and a control voltage generation unit configured to output a delay control voltage.

The invention relates to a method for preparing strong-fragrance peanut oil through a microchannel reactor. The method comprises the following steps of step I, pumping peanut enzymolysis reaction fluid and an enzyme solution into the microchannel reactor, performing mixing in a first mixing module to obtain a mixture, enabling the mixture to enter a reaction module, and performing an enzymolysis reaction; step II, performing high-temperature enzyme activity inactivation, and ending the enzymolysis reaction; step III, thoroughly mixing a reaction system with reducing sugar and peanut oil so as to obtain a mixed reaction system; step IV, enabling the mixed reaction system to enter a second high-temperature module, rapidly raising the temperature to reach the temperature required by a technology, and performing a Maillard reaction; and step V, enabling the reaction system to flow across a low-temperature module and flow out of the microchannel reactor so as to obtain crude products of the strong-fragrance peanut oil. Through the adoption of the method disclosed by the invention, the enzymolysis process can be accurately controlled, and the thermal reaction temperature and the post-treatment temperature can be quickly and accurately controlled; and through the usage of the microchannel reactor, amplification effects are not generated, upgrading and amplification are easy, and seamless amplification from research and development to production can be realized.

The invention discloses an intelligent atomizing device of a breathing machine. An atomizer is spirally installed at the upper end of a volume cup. An upper end cover is installed on the top of the atomizer. A one-way valve is arranged on the upper end cover and sleeved with a connecting pipe. A discharge port is formed in the side wall of the volume cup. A rubber plug is arranged in the discharge port. A gas inlet port is formed in the lower end of the volume cup and sleeved with a connecting port. The connecting port is connected with a gas flow controller through a guide pipe. The gas flow controller is connected with the port of the breathing machine through a flow division port. Gas flow power used by the atomizing device comes from the breathing machine, flow speed is stable, flow is more precise compared with the prior art, the oxygen concentration and tidal volume of the breathing machine during treatment are not influenced, the safety of patients is ensured, and it can be ensured that medical work and nursing work are smoothly conducted; in the medicine addition process, by means of the discharge port in the outer side of the volume cup, the upper cover of the atomizer does not need to be opened, and ventilation continuity can be ensured.

The invention provides a short-distance takeoff ideal scheme of a running take-off airplane. The core technology is that a runway is divided into a fixed part and a dynamic part, and the fixed part is closely connected with the dynamic part, so that the airplane is static relative to the fixed runway when running on the dynamic runway and enters into the fixed runway till being accelerated at a preset speed on the dynamic runway, therefore, the airplane can realize the short-distance takeoff under the status of high initial speed and large kinetic energy. The airplane not only meets the best requirements of the aircraft carrier airplane such as short-distance takeoff, full-load takeoff and full-oil takeoff, but also has the capability of short-distance landing. A crawler type integrated dynamic runway has the functions of short takeoff and landing, can be used for preventing the airplane from rushing out of the runway in a land aerodrome, can be used for building a military field aerodrome, can be used for building a temporary takeoff and landing point for the vehicle-mounted (carrier-based) military aircraft, possibly brings the development direction of the miniaturization and the submarine trend of the aircraft carrier, and possibly brings the great change of an air operation mode. The airplane jointly uses three schemes such as a crawler type integrated dynamic runway, a three-point type synchronous running wheel short-distance take-off airplane, a straight line type synchronous column wheel short-distance take-off airplane, and the like.

The invention discloses a single-pump hydraulic system used for a forklift. The single-pump hydraulic system comprises a hoist cylinder, an oblique cylinder, a steering cylinder and a gear pump which is used for supplying high-pressure oil fluid to the hoist cylinder, the oblique cylinder and the steering cylinder; the single-pump hydraulic system further comprises a hydraulic oil tank, a multi-way reversing valve and a full-hydraulic steering gear; the oil inlet end of the gear pump is connected with the oil outlet end of the hydraulic oil tank; the oil outlet end of the gear pump is connected with the multi-way reversing valve; the multi-way reversing valve is connected with the oil return end of the hydraulic oil tank; the hoist cylinder, the oblique cylinder and the steering cylinder are all connected with the multi-way reversing valve; and the full-hydraulic steering gear is connected between the multi-way steering valve and the steering cylinder. According to the single-pump hydraulic system used for the forklift disclosed by the invention, the production and manufacture cost is lowered; the operation is more convenient and comfortable; and the production efficiency is improved.

A device for damaging weeds, the device having a pressure-conveyance unit, which is designed to convey a fluid under pressure, and a fluid-dispensing unit, which is fluidically connected to the pressure-conveyance unit and is furthermore developed to dispense the pressurized fluid to the weed in order to damage the weed, the fluid-dispensing unit including at least one valve that has a piezo-actuator or an electroactive polymer actuator or a magnetoresistive actuator.

A rotational speed sensor arrangement is provided that includes a transmitter wheel, which has signal markers that are spaced apart from one another; a sensor with at least two Hall sensor elements that form a differential Hall sensor and that each output a Hall signal as a function of the position and / or motion of the signal markers; and a signal circuit that determines an output signal based on the Hall signal, and defines a rotational position of the transmitter wheel based on the output signal, wherein the signal markers have radially extending tooth elements with two switching flanks, and the switching flanks converge in a switching edge. A drive shaft arrangement, an internal combustion engine, and a motor vehicle are also provided.