180results about How to "Good control" patented technology

A catheter adapted for performing a task at a location inside a lumen, the catheter comprising: a) an outer sheath; b) a balloon capable of inflating inside the lumen when the catheter reaches the location; and c) a balloon inflation tube, which is attached to the balloon and carries a fluid which causes the inflating of the balloon, said balloon inflation tube running through the outer sheath, movable relative to the outer sheath, and stiff enough so that it can be used to push and pull the balloon relative to the outer sheath.

The invention discloses a system for kinetic model test of the ballastless track subgrade of a high-speed railway. The system comprises a model test box, a model of the ballastless track subgrade of the high-speed railway, an excitation system and a monitoring system, wherein the model of the ballastless track subgrade of the high-speed railway is formed by the foundation, a foundation bed bottom layer, a foundation bed surface layer, a concrete base, CA (cement asphalt) mortar, a track plate, a fastener system and a steel rail in sequence; the excitation system comprises a series of vibration exciters; simulation of train loads at different running speeds is realized by cooperatively controlling the vibration excitation frequency and phase of each vibration exciter; and dynamic earth pressure sensors and layered settlement gauges are arranged in the model of the subgrade, steel strain gauges are embedded in the concrete base and displacement and acceleration sensors are arranged on the track structure to jointly form the monitoring system of the system. The system can be used for carrying out study on the kinetic model test of the subgrade under the running load of the train and can evaluate and predict different foundation conditions, subgrade structures and track irregularity.

The invention relates to a method for heating water in a domestic water heating system that comprises the steps of: (a) providing a water tank containing mw liters of water; (b) providing at least one temperature sensing unit in said water tank for sensing the temperature of the water in the tank: (c) providing a heating element in said water tank; (d) providing a control unit for activating said heating element, said control unit continuously receiving indication for the water temperature from said temperature sensing unit; (e) providing to said control unit a desired water temperature, and designating a time for using the water at said desired temperature; (f) knowing the current water temperature, the desired water temperature at said designated time, the power of the heating element, and the specific heat of the water, calculating by the control unit the heating period Δt needed for heating the water in the tank from the current temperature as measured by said temperature sensing unit, to the desired temperature; (g) periodically repeating said calculation and updating said calculated period Δt according to changes in the sensed water temperature; and (h) when the designated usage time is approaching, activating the heating element a Δt period before the said designated period.

Method and system for controlling the density to a predetermined level of an edible aerated foodstuff product during the preparation thereof. A density measurement is acquired on the aerated product at a location sufficiently downstream of a shearing unit used to form the aerated material such that the product is in an equilibrated state. Consequently an adjustment can be made in the introduction rate of aeration gas at a location upstream of the shearing unit which is calculated to reduce any difference between the predetermined and measured product densities in a precise and reliable manner. Also, injection gas of reduced solubility may be used so that product density can reach equilibrium sooner. Upstream disturbances in the density of a formulation starter material also may be monitored and countered by adjustments made in the gas flow rate to assist in maintaining a desired product density.

A foaming insecticidal ant spray is described that minimally comprises an essential oil, an emulsifier, a carboxylate salt and water, which has maximum mortality on ants. A method for killing and controlling ants is described wherein the composition is foamed directly onto the ants whereby the ants become entangled within the foam, increase their contact time with the compositions, and perish.

The number of releasable licenses is registered in a first entity, the resource to be used being attributed and/or having withdrawn from it, by a second entity, a releasable license for use which is registered in the second entity and/or a license. In a synchronization step the difference between the number of licenses allocated for use since a previous synchronization step and the licenses released again in this time is repeatedly reported from the second entities to the first entity respectively, this difference being taken as a basis for reducing or increasing the number of releasable licenses registered in the first entity, and conversely the resultant number of releasable licenses is reported from the first entity to the second entity and is registered there as the number of releasable licenses.

The invention discloses a preparation method for a railway road bed large-week acceleration loading physical model test device. According to the method, the device is adjusted by constructing a model test box, a high-speed railway ballastless track road bed model, a monitoring system and an exciting system through analysis of a load bearing ratio test result, and a continuous steel rail is cut into fragmental steel rails, so that a stress state of a sub-rail structure is close to a state of running of a real train. Due to cooperative work of vibration exciters in the exciting system, a value model is used for calculating a load time-history result serving as an input load, so that running states of the real train at different speeds can be simulated. The device prepared by the method can be used for short-time and long-time test research on long-time dynamic performance of traffic basic facilities.

An system and method for flow control by controlling the output pressure for a liquid or a gas independently of the input pressure.

The facade unit (1) has three plate sections (2, 3, 4). The intermediate space (5) facing the building interior is filled with gas, the exterior intermediate space (6) being filled with a circulating liquid (7) which is dyed or pigmented in such a way that it absorbs infrared light but is at least partially transparent for visible light. This ensures that the building interior is well shaded from heat radiation and provides and efficient means of acquiring heat energy. The efficiency can be increased further by various methods.

An IP network includes a network resource manager having a resource utilization map adapted to manage network resources in an IP network and an application framework having elements for receiving a request for a multicast distribution from a client in the IP network, and elements for requesting network resources from a network resource manager for a Media Quick Start, to start the requested multicast distribution. Further, the network resource manager includes elements for providing the application framework with feedback information relating to network resource availability from the network resource manager, and the application framework includes elements for receiving the feedback information and elements for allowing the Media Quick start or to use another behavior to start the requested multicast distribution based on the received feedback information.

The invention discloses a BIM-based engineering information management method and device, a terminal and a storage medium, and the method comprises the steps: building a 3D simulation model of a target building according to the design parameters and professional design standards of an engineering project; Compiling a construction progress plan according to the sub-item engineering information of the 3D simulation model; Establishing a link between the construction progress plan and the 3D simulation model to integrate the 3D simulation model with a time dimension so as to form a 4D progress plan model of the target building; Compiling project cost budget data according to the material cost information of the target building and the sub-item project information of the 3D simulation model; And integrating the project cost budget data on the basis of the 4D progress plan model to form a 5D progress cost plan model of the target building. According to the invention, progress and cost control are associated and integrated into the BIM model, so that the capability, efficiency and level of BIM technology application are effectively improved.

A radar level gauge system is disclosed, having a transmitter for transmitting measuring signals towards the surface of the filling material, a receiver for receiving echo signals from said surface and a fastening structure adapted to secure said transmitter and receiver in a measuring position on a feed-through structure located in an upper boundary of said container. Further, a sealing unit is arranged between said fastening structure and said feed-through, and adapted to provide a pressure seal between the inside and the outside of the container, and in addition, there is provided means for blocking electromagnetic energy, adapted to block net transfer of electromagnetic energy between the inside and the outside of the container through said sealing unit.

The invention provides a control method for preventing a steel coil inner ring from core pulling during coil stripping of a coiling machine. The control method for preventing the steel coil inner ring from core pulling during coil stripping of a coiling machine comprises the steps that the position of a tong opening is detected after coiling is finished; an ideal shearpoint of strip steel is calculated; a strip tail is positioned; and automatic coil stripping is conducted. The phenomena of jamming of a strip head, scratching of the steel coil inner ring and core pulling during coil stripping can be completely eliminated by adopting the control method for preventing core pulling of the steel coil inner ring during coil stripping of the coiling machine.

The invention discloses a low-loss optical fiber and a manufacturing method of the low-loss optical fiber, and relates to the field of optical fibers. The low-loss optical fiber comprises a step change waveguide; the step change waveguide comprises a core layer, a core cladding transition layer, a core cladding interface transition layer, a deep fluorine-doped cladding, a cladding sleeve transition layer, a cladding sleeve interface transition layer and a sleeve layer, wherein the core layer, the core cladding transition layer, the core cladding interface transition layer, the deep fluorine-doped cladding, the cladding sleeve transition layer, the cladding sleeve interface transition layer and the sleeve layer are arranged in sequence from inside to outside; the core layer is made of a pure silicon core slightly doped with fluorine or boron, wherein the relative refringence between the core layer and the pure silicon core is 0-0.1%; the deep fluorine-doped cladding is made of pure silicon dioxide deeply doped with fluorine, wherein the relative refringence between the deep fluorine-doped cladding and the core layer is 0.24%-0.28%; the refractivity in the core cladding transition layer is distributed in a gradient change mode according to a parabola curve, wherein the range of the absolute value of stress coefficients is from 0.005 to 0.015; the base point temperature rises gradually from 900-950 DEG C to 1150-1200 DEG C. The attenuation coefficient of the low-loss optical fiber manufactured according to the manufacturing method can be reduced to less than 0.158 dB/km in a 1550 nm wave band.

The present disclosure describes an electronic ignition circuit (“EIC”) for controlling at least one detonator. The EIC may include a protection circuit, an input circuit coupled to the protection circuit, a logical circuit electrically coupled to the input circuit, and an ignition circuit electrically coupled to the logical circuit. The protection circuit may include at least one of a fuse, a circuit breaker and an automatic switch. The logical circuit may include an answer back circuit, and a switching circuit adapted to switch to the next detonator or igniter. The ignition circuit may include a capacitor charging circuit, a capacitor discharge circuit to discharge a firing capacitor through a fuse head, and a shot detection circuit adapted to measure a voltage across the firing capacitor before discharging through the fuse head and to measure a voltage after discharging through the fuse head.

The invention relates to a high voltage ride-through method of a wind power converter. The wind power converter comprises a direct-current bus voltage bleeder circuit. The direct-current bus voltage bleeder circuit comprises an IGBT and a direct-current unloading resistor, and the IGBT and the direct-current unloading resistor are connected to the two ends of the converter after being connected in series. When the voltage of a power grid is higher than a set multiple of nominal voltage, the high voltage ride-through state is started, reactive output of a grid side converter is increased, the transient transition process of high voltage ride-through is achieved, and a unit can ride through a fault at the power grid voltage of 1.1 pu to 1.3 pu. Meanwhile, the fluctuation of the active power of the converter can be suppressed through positive and negative sequence current control, the direct-current bus voltage bleeder circuit releases electric energy, and the fluctuation of the active power of grid connection and the direct-current bus voltage caused by unbalance of the electrodynamic potential of the power grid can be effectively suppressed.

The invention provides a sampling circuit, a switching power supply control circuit, a switching power supply and a sampling method. The sampling circuit comprises a demagnetization time acquisition circuit which is used for acquiring transformer demagnetization time TDS of the switching power supply in one switching period and transmitting the demagnetization time to a sampling control circuit; the sampling control circuit which is used for outputting predetermined clock pulse CLK according to the demagnetization time TDS so as to control sampling time of a sampling holding circuit, wherein pulse width W1 of the predetermined clock pulse CLK is less than the demagnetization time TDS; and the sampling holding circuit which is used for acquiring instant feedback voltage VF of the switching power supply at a predetermined time point under the control of the clock pulse CLK and holding feedback voltage VF so as to output an analog single with amplitude of VF, wherein the predetermined time point is the instant at which the switching power supply starts to work continuously for a time period of W1 in a switching period after one switching period. Feedback voltage in the switching power supply can be accurately acquired and constant voltage control precision of the switching power supply can be enhanced.

The invention relates to a construction method for supporting templates in the building field, particularly relating to a construction method for supporting the templates at construction joints of a frame structure. The construction method comprises the following steps: top die sticks are arranged on components at two sides of the construction joints; a back arris is made of battens; the back arris is arranged in a through-length manner along a longitudinal direction of the component; the templates at the construction joints are supported at two sides of the back arris and arranged in the construction joints; the back arris and the templates arranged at the two sides of the back arris are connected with connecting pieces and are connected into a whole through the connecting pieces; then holes are drilled at specific positions of the templates at the construction joints; and split bolts are penetrated into the drilling holes to oppositely pull the templates in the construction joints and the templates at outer sides of the components, and additionally, the top die stick is supported in the components so that the templates are effectively fixed; concretes of the components at the two sides of the construction joints are poured at intervals; and at last, the back arris and the templates are dismantled. By using the method, section sizes of the concretes after pouring moulding on the two side structures of the construction joints, protective layer thicknesses of the components and pouring quality of the component concretes can be effectively ensured, thereby facilitating construction and operation.

The invention discloses an underdriven fruit and vegetable picking manipulator. The underdriven fruit and vegetable picking manipulator comprises a finger mechanism and a foundation support, wherein astep motor is arranged on the foundation support; a gear is arranged at the output end of the step motor; a rack fixing piece is arranged on the side surface of the foundation support; a rack is arranged in the rack fixing piece; a transmission connecting plate is connected to the upper end of the rack; a third connecting piece is arranged at the upper end of the side surface of the foundation support; a first connecting piece and a second connecting piece are respectively connected to two sides of the third connecting piece; a first supporting plate is connected to the upper end of the firstconnecting piece; a second supporting plate is arranged at the upper end of the second connecting piece; and the finger mechanism consists of a first finger, a second finger and a third finger havingthe same structure. The underdriven fruit and vegetable picking manipulator disclosed by the invention is easy to operate, and simple in structure; and the phenomenon of interference between the fingers can be avoided, so that nondestructive picking of fruits and vegetables can be effectively realized.

Tab length is controlled in a tape applicator by adjusting the position of a tension roll as the diameter or periphery of the tape supply roll is changed to increase the force pulling the tape from the supply roll as the diameter of the tape supply roll decreases without significantly changing the tension in the tape.

Embodiments of the invention relate to a chemical oxygen generator for an emergency oxygen device, comprising an outer housing defining an interior space and comprising an outlet opening, a solid oxygen source within said interior space containing a material which is able to produce oxygen in a chemical reaction. According to embodiments of the invention, a hollow tube within said interior space is embedded in said solid oxygen source.

Abstract of the Disclosure A power tool, such as a reciprocating saw. The power tool generally includes a spindle for supporting a tool element, a body defining a pivot axis and housing a motor and a drive mechanism driven by the motor, the drive mechanism driving the spindle, the body having a forward end supporting the spindle and a rearward end, and a grip connected to the rearward end of the body for pivoting movement about the pivot axis. The power tool may include a locking assembly for locking the grip in a pivoted position relative to the body and a switch assembly at least partially supported on the grip. The switch assembly is preferably inoperable when the locking assembly is in an unlocked condition, and the locking assembly preferably cannot be moved to the unlocked condition when the switch assembly is in an operating condition.

Techniques for interacting with an electronic display board are disclosed. According to one embodiment, a remote controller includes a laser generator, several motion sensors, a Micro Central Unit has data process capability and memory inside to store programs and a transceiver or a transmitter. A laser beam from the laser generator facilitates a writing movement on the electronic data board, the motion sensors detect the movement of the remote controller, and the MCU calculate the sensor data to derive the movement, the transmitter transmits the movement from the controller to the electronic data board. In accordance of the detected movement, the movement of the remote controller corresponding to the laser is electronically represented on the electronic display board.

The invention relates to the technical field of semiconductors, and particularly relates to a gas uniformizing device for a PECVD (Plasma Enhanced Chemical Vapor Deposition) system. The gas uniformizing device comprises a first gas uniformizing disc which is arranged below a substrate table, wherein the first gas uniformizing disc is of a disc-shaped structure, and the outer edge of the first gas uniformizing disc is tightly glued to the inner wall of a cavity; an air vent is formed in the middle of the first gas uniformizing disc, a supporting rod of the substrate table is located in the air vent, and the diameter of the vent hole is larger than that of the supporting rod. The first gas uniformizing disc in the uniformizing device provided by the invention is arranged below the substrate table, and gas flows towards an air outlet from a gap between the first gas uniformizing disc and the supporting rod so as to control gas flow in the lower half cavity very well, so that the distribution of the gas flow in the whole cavity is relatively uniform, and the uniformity of a deposition thin film is ensured.

The invention discloses a composite solidifying agent and a gas field three-sulfonated system waste drilling mud solidifying optimization method. The optimization method mainly comprises the steps: fully stirring the waste drilling mud containing a three-sulfonated system, and adding 5-8 g/L of ferric chloride powder to break gel and destabilize; then adding a composite solidifying agent composedof 10-15% of fly ash, 1-2% of quicklime and 8-12% of Portland cement by the mass percentage; and finally die-filling and drying, and completing mud solidification. The selected composite solidifying agent is cheap in composition and simple in process and can obviously solidify heavy metals in drilling mud of Tarim gas fields, and at the same time, the condition of standard exceeding of solidifiedbody leachate is greatly improved.

The invention discloses an edge exposure device. The edge exposure device comprises an adsorption and rotating platform for adsorbing and driving a silicon chip to rotate, a motor for supplying power for the adsorption and rotating platform, an edge exposure lens assembly comprising an edge exposure camera lens and an exposure spot monitoring lens, wherein along an optical propagation direction, the edge exposure camera lens orderly comprises an exposure light source, first and second fly-eye lenses, a first cylindrical surface zoom lens group and a second cylindrical surface zoom lens group orthogonal to the first cylindrical surface zoom lens group, and a controller for controlling the motion of the motor, the edge exposure camera lens and the exposure spot monitoring lens. Through respective adjustment of combined focal length of the first cylindrical surface zoom lens group and the second cylindrical surface zoom lens group, edge exposure field length and width are controlled respectively, through cooperation of the first and second fly-eye lenses and the first and second cylindrical surface zoom lens groups, an exposure field is obtained, and through coaxial exposure field light spot imaging or energy detection light path, automatic focusing, exposure dosage and exposure size monitoring functions are obtained.

The invention discloses a high-voltage inverter adaptive control system based on a neural network. The high-voltage inverter adaptive control system based on the neural network comprises a power source module, a frequency conversion module, a motor, a detection module and a control module. The frequency conversion module is connected between the power source module and the motor. The control module comprises an operation display circuit, a main control circuit and a base drive circuit. The operation display circuit is connected with the main control circuit for operation of a user. The main control circuit is connected with the frequency conversion module and the motor through the detection module to detect feedback signals of the frequency conversion module and the motor. The main control circuit comprises a proportion integration differentiation (PID) controller and the neural network. Output of the PID controller is adjusted according to the feedback signal by the neural network so that intelligent constant voltage frequency ratio control or electric current control performed to the frequency conversion module is achieved. According to intelligent characteristics of self-learning, self-adaptation and the like of the neural network, good control of a complex nonlinear system is realized so that stability and control accuracy of the control system are guaranteed. Meanwhile, the invention further discloses a construction method of the high-voltage inverter adaptive control system based on the neural network.