36results about How to "Improve the controllable range" patented technology

A tone control device applied to an electronic wind instrument realizes an octave-changeover-blowing technique in which the same note is produced with different octaves respectively by use of the same fingering state, thus increasing controllable ranges with regard to the tone volume, tone color, and tone pitch. A plurality of flow sensors are arranged in proximity to an edge with which a jet flow caused by blowing air into a blow hole of a lip plate collides within a tube of a wind instrument controller simulating an air-reed instrument. The flow sensors are horizontally arranged to detect a jet width, thus controlling the tone volume; and the flow sensors are vertically arranged to detect a jet eccentricity or a jet thickness, thus controlling the tone color. Ascending or descending of the tone pitch by octaves is controlled by use of the flow sensor and a jet length sensor.

In a DC motor drive unit having an open loop control system, a judgment is made as to whether an externally supplied speed instruction data instructs driving of the DC motor or not, based on the speed instruction data itself. If a judgment is made that the speed instruction data instructs driving of the DC motor, a switching means (e.g. switching transistor) connected to the DC motor is controlled by PWM pulses having prescribed duty ratios over a predetermined acceleration period to accelerate the DC motor. After the acceleration period, the switching means is controlled by the PWM pulses having a duty ratio as instructed by the speed instruction data to drive the DC motor. This scheme permits suppression of the startup current of the motor, and hence reduction of the withstand current of the switching transistor, while ensuring secure startup of the motor. In addition, the range of controllable speed of the DC motor can be broadened.

The invention relates to a high-boron content silicon-boron-carbon-nitrogen precursor and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing functional, bifunctional and trifunctional chlorosilane containing unsaturated groups and hexamethyl-disilazane at a low temperature according to a certain ratio, raising the temperature and completely reacting, dropping 1,3-diethyl cycloborazane under low temperature conditions according to a certain ratio, fully reacting the reactants, and finally performing reduced pressure distillation to obtain the solvent and by-products produced by the reaction, thereby obtaining faint yellow viscous liquid or a solid product, namely the SiBCN ceramic precursor. According to the synthetic method disclosed by theinvention, a novel Polyborosilicate resin is prepared by adopting a 'double boron source', the boron content of the prepared SiBCN ceramic can reach 20%, and the problems that the boron content is low and improvement of high temperature resistance and oxidation resistance of the ceramic is not obvious can be solved. The elementary composition regulation range of the precursor disclosed by the invention is wide, and resins which are suitable to serve as a high-temperature-resistant coating, a fiber reinforcement or a ceramic-based composite material matrix and have different elementary compositions can be prepared.

It is an object of this invention to provide a gas fuel supply system in which a controllable range in the fuel injection quantity control by an injector is enlarged. According to one preferable aspect of this invention, the gas fuel supply system comprises an injector provided in an intake pipe of an internal combustion engine, a fuel supply passage for supplying the gas fuel to the injector, and means for controlling pressure of the gas fuel supplied to the injector through the fuel supply passage by using negative pressure in the intake pipe such that the pressure of the gas fuel increases if the negative pressure in the intake pipe decreases, and the pressure of the gas fuel decreases if the negative pressure in the intake pipe increases.

The invention relates to a high voltage ride-through method of a doubly-fed wind turbine generator set. The method comprises the steps of: a voltage u on a power gride side is detected in real time, and the value of f(u)=k*u+A; when f(u)<=udc0 is calculated, the given value of the voltage of a direct current side bus is controlled to be udc0; when udc0<f(u)<=udcmax, the given value of the voltage of the direct current side bus is the value of f(u); when f(u)>=udcmax, the given value of the voltage of the direct current side bus is udcmax; wherein udc0 is a minimum direct current bus voltage value needed by rated alternating current voltage output; udcmax is the maximum value, and k is larger than 1; and the trigger pulse of a switch element of a network side current transformer is correspondingly adjusted according to given value of the voltage the direct current side bus. According to the invention, the given value of the voltage the direct current side bus is correspondingly adjusted according to the real-time change and the change range of the voltage of the power grid, and then high voltage ride-through is finished, so that ride-through operation of the generator set under a high voltage state is realized.

The invention discloses a teaching amusement robot controlled by mobile phone short massage. It includes mechanical and electronic parts. The former includes basal disc of which bottom is set drive and driven wheels. Its platform is set bearing platform on which the mechanical arm and paw are set. The electronic part includes power source interface, crystal libration circuit, reset circuit, voltage stabilizing circuit, motor drive circuit, mobile phone short massage module, infrared sensor, and crash sensor. The central processor is used to process the command information transmitted from the mobile phone short massage module, control motor drive circuit according to the corresponding command. The drive motor is used to control robot drive wheel and mechanical arm by driving mechanism. The crash sensor and infrared sensor are used to transmit the environmental information to the central processor. The robot of the invention can eliminate carried circuit to expediently, freely teach and recreate.

It is an object of this invention to provide a gas fuel supply system in which a controllable range in the fuel injection quantity control by an injector is enlarged. According to one preferable aspect of this invention, the gas fuel supply system comprises an injector provided in an intake pipe of an internal combustion engine, a fuel supply passage for supplying the gas fuel to the injector, and means for controlling pressure of the gas fuel supplied to the injector through the fuel supply passage by using negative pressure in the intake pipe such that the pressure of the gas fuel increases if the negative pressure in the intake pipe decreases, and the pressure of the gas fuel decreases if the negative pressure in the intake pipe increases.

The invention discloses an applet testing method, device and system, equipment and a medium, and relates to the technical field of software testing, and the specific implementation scheme is as follows: when an applet to be tested in a host program is in a running state, obtaining a test engine master control code file and a test engine slave control code file to be injected; running the test engine main control code file through a main process of the to-be-tested applet to receive a test instruction sent by an external module, and executing the test instruction or notifying a slave process toexecute the test instruction; and running the test engine slave control code file through the slave process of the to-be-tested applet so as to receive and execute a test instruction sent by the master process. According to the technical scheme provided by the embodiment of the invention, the convenience of automatically testing the applet is improved, and meanwhile, the controllable range of testing the applet is expanded.

The embodiment of the invention provides an Internet of Things equipment control method and device, electronic equipment and a storage medium. The method is applied to a first controller and comprisesthe following steps: monitoring a first control instruction of an Internet of Things gateway; monitoring control state information sent by a second controller; and broadcasting the first control instruction when it is determined that the first state of the controlled object controlled by the second controller is not matched with the second state indicated by the first control instruction according to the first control instruction and the control state information.

The invention provides a sucker type magnetorheological damping system and method, and belongs to the field of dampers. The damping system comprises a sucker module, a magnetorheological damping module, a support module, a controller and a connecting module; the sucker module, the magnetorheological damping module and the support module are coaxially mounted in sequence, and are connected with thecontroller through the connecting module; the controller is used for driving each part of the damping system and acquiring signals acquired by the sucker module; the connecting module comprises a motor driving wire, a coil driving wire, a negative-pressure pump driving wire, a sensor wire and a negative-pressure hose; and through design of a magnetorheological fluid bypass and combination with the atmospheric pressure and a force sensing function of a piezoelectric sensor, the relative movement between a sealing piece of a traditional magnetorheological damper and a shaft or a hole is prevented, so that uncontrollable friction force always existing in the magnetorheological damper is reduced, the lower limit of controllable damping force of the magnetorheological damper is reduced, and the controllable range of the magnetorheological damper is widened.

The invention discloses an injection current control device of a hybrid active third harmonic injection matrix converter, which relates to the field of hybrid active third harmonic injection matrix converters. In the injection current control device, a reactive component control bridge arm is bridged between an x end and a z end of a voltage selector and is connected with a y bridge arm end of the voltage selector through a path selection circuit;When H3IMC runs at a non-unity power factor, the reactive component control bridge arm is controlled according to the absolute value of the reactive component of the injection current, and the path selection circuit is controlled to form a corresponding reactive component circulation path according to the positive and negative conditions of the reactive component; the injection current control device can solve the problem that the injection current is out of control when the H3IMC runs in a forward non-unity power factor, the reactive power control capability of the input side is enhanced, the actual controllable range of the power factor of the input side is widened, and full-input power factor control during forward running is realized.

The embodiment of the invention provides a train speed control method and device. When a target train is connected with a collided train, the traction of the target train is cut off in advance by adopting a traction cutting-off method, the protection speed of an emergency brake trigger curve of the target train before the traction is cut off can be increased to the speed close to the emergency brake curve, then the controllable range of the ATO train control speed is increased, the difference between the running speed and the non-breakthrough speed of the target train can be shortened, and therequirement for the highest allowable collision speed of a coupler is met.

The invention discloses a coupling system for electric eddy current braking and regenerative braking of an electric vehicle. The coupling system comprises an electric eddy current brake assembly, a motor assembly, an energy storage device assembly, an insulated gate transistor T1, an insulated gate transistor T2, an insulated gate transistor T3, an electromagnetic relay K1, an electromagnetic relay K2, an inductor L2 and a filter capacitor C1 assembly. The combined control of the insulated gate transistors and the electromagnetic relays achieves a motor driving mode, a mode of electric eddy current braking independently driven by an energy storage device, a regenerative braking mode, a regenerative braking coupling electric eddy current braking mode and a mode of electric eddy current braking independently driven by a motor. The coupling system for electric eddy current braking and regenerative braking of the electric vehicle has the beneficial effects of providing various selectable electric braking modes, improving the controllable range of electric braking torque, reducing the proportion of a friction braking system, improving the braking performance of the vehicle, enabling rectified currents to be controllable by controlling a trigger delay angle, improving the energy utilization rate, and fully recovering braking energy to a higher degree.

The invention discloses a pipeline-variable air spring with an auxiliary air chamber. The pipeline-variable air spring with the auxiliary air chamber comprises a main air chamber and the auxiliary airchamber, the main air chamber and the auxiliary air chamber are connected, and the main air chamber and the auxiliary air chamber are connected through a plurality of branch pipes; each branch pipe is provided with an electromagnetic valve, and all the electromagnetic valves are connected with a controller; and the top of the main air chamber is provided with an upper cover plate for sealing themain air chamber. According to the pipeline-variable air spring with the auxiliary air chamber, the controllable range and controllable precision of the air spring can be improved, the driving smoothness of an automobile is improved, and characteristic requirements of different working conditions are met.

A controller for an axial gap-type motor (3) comprises a rotor (11) having a permanent magnet and a first stator (12a) and a second stator (12b) opposed to each other with the rotor (11) interposed therebetween in the axial direction of revolution of the rotor (11). The controller further includes an electrification control portion which supplies a torque current (Iq) for generating a magnetic field to revolve the rotor (11) to an armature winding (13a) of the first stator (12a) and supplies a field current (+Id) for reinforcing the magnetic flux by the permanent magnet of the rotor (11) or a field current (−Id) for weakening the magnetic flux to an armature winding (13b) of the second stator (12b). Consequently, the controllable range of the motor is increased and the axial gap-type motor can be operated at higher velocity and higher torque.

The invention discloses a preparation method of polyaluminocarbosilane with high aluminum content and low oxygen content. Liquid hyperbranched liquid polycarbosilane and methylaluminoxane are adopted as raw materials, polyaluminocarbosilane is prepared under closed inert conditions, and the content of aluminum element in the polyaluminocarbosilane can be adjusted by adjusting the ratio of the raw materials. The invention also discloses the polyaluminocarbosilane prepared based on the method, the mass percentage content of aluminum element can be 0-20%, and the mass percentage content of oxygen element is less than 2%. The invention further discloses SiAlC ceramic obtained after high-temperature cracking of the polyaluminocarbosilane, Si, Al and C elements in the SiAlC ceramic are adjustable in composition, and the SiAlC ceramic has excellent high temperature resistance and oxidation resistance, can be used for preparing an ultrahigh-temperature-resistant C / SiAlC ceramic-based composite material through a PIP method, and can also be used for preparing an ultrahigh-temperature oxidation-resistant coating and fiber.

The invention discloses a perspectivity fixing device for infants in radiology department. The perspectivity fixing device structurally comprises a control transmission case, helical rods, an infant protective chair, a power transmission chair, a rotary motor, locking bolts and a motor assembly ring, wherein the control transmission case is in a cuboid shape; the lower part of the right side of the control transmission case is connected with the power transmission case in a locking manner and is communicated with the power transmission case; the helical rods penetrate through the top end of the control transmission case and is clasped with the control transmission case; the infant protective chair is in threaded connection with the helical rods; the power transmission case is in a convex shape; an embossed plate is arranged rightwards; the middle part of the top end is connected with the motor assembly ring through the locking bolts in a locking manner; when the device is used, throughmulti-gears and a spring structure of a transmission case and a control case arranged in the device, the device can slow down the rotation speed of the device, so that a controllable range of the device can be widened, the control is more accurate, and start / stop fluctuation of the device can be reduced, and the comfort of the infants is further ensured; moreover, the device can be released in anon-working state, so that non-working mistaken contact danger is further prevented, and the security is ensured.

The invention discloses an injection current control device of a hybrid active third harmonic injection matrix converter, and relates to the field of a hybrid active third harmonic injection matrix converter. In the injection current control device, a reactive component control bridge arm is connected across Between the x terminal and the z terminal of the voltage selector and connected to the y bridge arm terminal of the voltage selector through a path selection circuit, when the H3IMC operates with a non-unity power factor, it controls the reactive power according to the absolute value of the reactive component of the injected current The component controls the bridge arm, and controls the path selection circuit to form the corresponding flow path of the reactive component according to the positive and negative conditions of the reactive component; the injection current control device can solve the injection current out of control when the H3IMC is running in the forward non-unity power factor The problem is to enhance the reactive power control capability of its input side, broaden the actual controllable range of its input side power factor, and realize full input power factor control during forward operation.

The invention relates to the technical field of information, in particular to a range hood controller and control method based on a microwave radar gesture recognition technique. The range hood controller comprises a signal transceiver module, a gesture recognition module and a control module, wherein the signal transceiver module is used for periodically transmitting a microwave radar signal to apreset range and receiving a radar echo signal reflected by a hand part; the gesture recognition module is connected with the signal transceiver module and used for recognizing gesture actions of thehand part according to the radar echo signal and generating a recognition signal corresponding to the gesture actions; and the control module is connected with the gesture recognition module and usedfor forming a control signal corresponding to the recognition signal and being used for controlling a range hood to be started or stopped according to the recognition signal generated by the gesturerecognition module. According to the range hood and the control method thereof, the anti-interference property and the sensitivity are high, the control distance is long, and the more convenient and intelligent experience is brought for a user.

The invention provides a sucker type magnetorheological damping system and method, and belongs to the field of dampers. The damping system comprises a sucker module, a magnetorheological damping module, a support module, a controller and a connecting module; the sucker module, the magnetorheological damping module and the support module are coaxially mounted in sequence, and are connected with thecontroller through the connecting module; the controller is used for driving each part of the damping system and acquiring signals acquired by the sucker module; the connecting module comprises a motor driving wire, a coil driving wire, a negative-pressure pump driving wire, a sensor wire and a negative-pressure hose; and through design of a magnetorheological fluid bypass and combination with the atmospheric pressure and a force sensing function of a piezoelectric sensor, the relative movement between a sealing piece of a traditional magnetorheological damper and a shaft or a hole is prevented, so that uncontrollable friction force always existing in the magnetorheological damper is reduced, the lower limit of controllable damping force of the magnetorheological damper is reduced, and the controllable range of the magnetorheological damper is widened.

The embodiment of the present invention provides a train speed control method and device. When the target train is connected to the collided train, the traction cutting method is adopted to cut off the traction of the target train in advance, and the emergency braking of the target train can be triggered before the traction is cut off. The protection speed of the curve is increased to a speed close to the emergency braking curve, thereby increasing the controllable range of ATO control speed, which can shorten the gap between the running speed of the target train and the unbreakable speed, so as to meet the maximum allowable collision speed of the coupler. .

The invention relates to the technical field of intelligent cabins, and provides a vehicle-mounted voice control method and device in butt joint with a third-party application. The method comprises the steps that when it is monitored that a target screen displays an interface of a third-party application, control types of all controls are obtained; taking a control corresponding to the control type meeting a preset control type condition as a specified control, determining a control position of the specified control on the target screen, and storing the control position in a specified control list; obtaining a character command character string corresponding to each specified control and updating the character command character string to a specified control list; registering a voice command object according to a command corresponding relation between each character command character string and the control position; when the voice information is received, determining the content of the voice information; and if the target voice command object matched with the voice information content exists in the voice command objects, executing corresponding operation. According to the vehicle-mounted voice control method in butt joint with the third-party application provided by the invention, the user experience of using the vehicle-mounted voice and the driving safety are improved.

The invention relates to the technical field of cable detection, and discloses an outdoor high-altitude cable detection device with a Tiantong data transmission network. The detection device comprises an unmanned aerial vehicle main body of an airborne Tiantong satellite communication system, lateral overturning assembly grooves are formed in the two side walls of the unmanned aerial vehicle main body, electric control overturning type adjusting mechanisms are movably assembled in the lateral overturning assembly grooves, and electric control type lifting arms are movably assembled in the electric control overturning type adjusting mechanisms; electric control type top driving wheels are movably assembled on the inner top faces of the electric control type lifting arms, and a visual sensing probe, an optical distance measuring probe and an optical detection unit are assembled on the upper surface of the unmanned aerial vehicle body. According to the detection device, the Tiantong satellite technology is adopted for direct information transmission, the detection device is not affected by a land base station, and information communication is more convenient; the unmanned aerial vehicle body is adopted as a carrier for control, manual conveying is not needed, and the transfer cost is saved; the device is hoisted on the cable in a lateral overturning manner, does not need to be driven by an unmanned aerial vehicle main body in the detection process, and is good in cruising ability.

The invention discloses a driving control method for a novel slewing bearing test bed. The method comprises the following steps of (1) obtaining the transfer function model of a slewing bearing control system by adopting a system identification method; (2) setting a step-change response trajectory expected by the system, iterating a parameter vector of an initial controller by adopting a nonlinear least square method, and keeping the parameter vector of the initial controller to be unchanged; (3) splitting the linear controller to obtain a parameter component and a structural component of the controller; (4) adding a coupling variable to the structural component of an initial linear PID controller to form a candidate controller, and subjecting the index of the coupling variable to iteration operation. According to the invention, based on the driving control method for the novel slewing bearing test bed, a traditional PID controller is subjected to nonlinear treatment, so that the accurate position control of the slewing bearing test bed is realized. Therefore, the slewing bearing can track a preset expected trajectory, so that the stability of the test bed can be improved.

The invention relates to a miniature electromagnetic switch valve driving controller based on valve core displacement soft measurement, which comprises a power supply module, a DSP control unit, a signal isolator, a driving circuit module, an electromagnetic switch valve, a current acquisition module, a pressure acquisition module and a temperature acquisition module, wherein the power supply module is connected with the DSP control unit, the signal isolator and the driving circuit module, the electromagnetic switch valve is connected with the driving circuit module, the current acquisition module, the pressure acquisition module and the temperature acquisition module, and the current acquisition module and the temperature acquisition module are connected with the DSP control unit. According to the invention, three-voltage driving is adopted, the duty ratio of a low-voltage high-frequency signal can adapt to changes of external supply pressure, the controllable range of the duty ratio can be widened, the precision of adapting to working condition changes is improved, the dynamic response characteristic of the electromagnetic switch valve is improved, the stability of a hydraulic system is improved, and energy loss is reduced.

The invention discloses an interface operation method and device, equipment and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: communication connection is established between the electronic equipment and peripheral equipment, wherein the peripheral equipment comprises a touch panel; the electronic equipment can receive first input of a user for the display screen, the first input corresponds to the input parameters, and therefore the mapping relation between the first area corresponding to the input parameters of the first input and the second area of the touch panel is established. When the user touches the second area, the touchpad can receive second input aiming at the first position of the second area, the electronic equipment can perform target operation on the target content displayed at the second position of the first area, the second position is the position with the mapping relation with the first position, and the target operation is the operation corresponding to the second input. According to the embodiment of the invention, the problems that the control form of the electronic equipment is single, the flexibility is not high, and the user experience is reduced in the related technology can be solved.

The invention relates to the technical field of cyanamide production, in particular to a cyanamide dimerization reactor and a process thereof, and the process comprises the following steps: S1, introducing fluidizing gas into the reactor, and opening a heat exchange device at the same time; S2, adjusting the temperature of a heat exchange device according to the temperature and flow of the fluidization gas to control the temperature of a fluidization polymerization area; S3, introducing cyanamide gas after the temperature of the fluidized polymerization area of the reactor is balanced and stable; S4, enabling the hydrogen cyanamide gas to enter a fluidization polymerization zone, carrying out dimerization reaction under the action of a catalyst to generate mixed gas containing dicyandiamide, and cooling the fluidization polymerization zone by using a heat exchange device; and S5, separating the mixed gas containing the dicyandiamide to obtain the dicyandiamide. In the application, the heat exchange device improves the temperature balance of the fluidization polymerization area, and improves the controllable range and efficiency of the temperature in the reactor through independent and / or grouped control.

Embodiments of the present invention provide a control method, device, electronic device, and storage medium for an Internet of Things device. The method is applied to the first controller, including: listening to the first control instruction of the Internet of Things gateway; listening to the control state information sent by the second controller; according to the first control instruction and the control state information, determine the When the first state of the controlled object controlled by the second controller does not match the second state indicated by the first control instruction, broadcast the first control instruction.

A semiconductor device includes: a semiconductor substrate; a first semiconductor region formed in the reverse surface region of the semiconductor substrate and including a first conductivity type impurity; a second semiconductor region formed on the first semiconductor region in the semiconductor substrate and including a second conductivity type impurity; a third semiconductor region formed on the second semiconductor region in the semiconductor substrate and including a first conductivity type impurity; a trench passing through the second and third semiconductor regions and reaching the first semiconductor region; and a gate insulating film formed along the wall face of the trench; a gate electrode formed on the gate insulating film in the trench. Further, a pocket region including a second conductivity type impurity of which peak concentration is higher than that of the second semiconductor region is formed by a side of the trench between the second semiconductor region and the third semiconductor region.