32results 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 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.

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 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 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 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 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.