203results about How to "Energy stability" patented technology

A laser (126) and an AOM (10) are pulsed at substantially regular and substantially similar constant high repetition rates to provide working laser outputs (40) with variable nonimpingement intervals (50) without sacrificing laser pulse-to-pulse energy stability. When a working laser output (40) is demanded, an RF pulse (38) is applied to the AOM (10) in coincidence with the laser output (24) to transmit it to a target. When no working laser output (40) is demanded, an RF pulse (38) is applied to the AOM (10) in noncoincidence with the laser output (24) so it gets blocked. So the average thermal loading on the AOM (10) remains substantially constant regardless of how randomly the working laser outputs (40) are demanded. The AOM (10) can also be used to control the energy of the working laser output (40) by controlling the power of the RF pulse (38) applied. When the RF power is changed, the RF duration (44) of the RF pulse (38) is modified to maintain the constant average RF power. Consistent loading on the AOM (10) eliminates deterioration of laser beam quality and laser beam pointing accuracy associated with thermal loading variation on the AOM (10) and is advantageous for applications such as IC chip link processing where stable working laser outputs (40) with variable output intervals (50) are needed.

Systems and methods providing a modular building having pre-fabricated panel wall components are easily assembled to form a predetermined structure that provides for mating alignment and securement of the modular panels with each other along their adjoining seams, without requiring additional locking mechanisms for stabilizing the panels.

A light emitting device with generation of a pseudo contour suppressed is provided in which the drive frequency of a driver circuit is suppressed while the frame frequency is increased. In addition, a light emitting device with generation of a pseudo contour suppressed is provided in which the drive frequency of a driver circuit is suppressed while the dividing number of a subframe period is increased. To input plural bits of video signals into pixels in parallel, a switching transistor and a driving transistor are provided in each pixel in accordance with the number of the bits. In addition, a transistor for selecting a video signal (a data selecting transistor) is provided in each pixel in order to select each bit of a video signal within the pixel when display is actually performed at the pixels.

The invention discloses dual-beam laser selective melting and moulding equipment with an exchangeable powder cylinder. The equipment comprises two optical systems, a frame, a workbench plate, a powder feeding cylinder, a powder storage cylinder, a moulding cylinder, a powder returning cylinder, a moulding cavity, and two first driving mechanisms, which are used to respectively drive the moulding cylinder and powder feeding cylinder to move up and down. The workbench plate is fixed on the frame, the moulding cavity is fixed on the upper surface of the workbench plate, and the powder returning cylinder, the moulding cylinder, the powder feeding cylinder, and powder storage cylinder are fixed on the lower surface of the workbench plate from left to right in sequence. A scraper is arranged in the moulding cavity, and a second driving mechanism is arranged on the frame. A substrate is arranged in the powder feeding cylinder, a substrate is arranged in the moulding cylinder, the lower ends of the powder feeding cylinder and the moulding cylinder are both provided with a cylinder end cover, and the substrates are connected to a first piston system. A second piston system is arranged in the powder storage cylinder. The provided equipment has a high moulding efficiency and is capable of effectively reducing the deformation and cracking of members.

A shoe sole and shoe are provided for offsetting a wearer's side-to-side balance to encourage a wearer's conditioning and toning. The shoe sole includes a midsole width that underlies and supports a wearer's foot, and an upper midsole portion undercut at its peripheral sidewall around the heel to define a horizontal indentation. A lower midsole portion has a corresponding “undercut” in its upper surface that angles downward and outward from the indentation. The depth of the indentation forms a balancing portion between the medially and laterally placed indentations that is narrower than the midsole width, thereby forcing the wearer to adjust one's walking gait to maintain balance over the balancing portion. A structure with a base portion can be disposed along the indentation with upward and or downward extending extensions disposed along the peripheral sidewall. The structure can include leaf springs extending transversely over a central midsole portion.

A fluid flow energy capture device for power generation has a rotor with a substantially vertical axis and a plurality of vanes. A mount for the rotor allows the rotor to rotate in response to fluid flow such as wind contacting the plurality of vanes, and the mount puts the rotor in rotationally driving communication with a generator. The rotor has an open center which allows fluid communication from spaces between the vanes to above the rotor. A plurality of guide surfaces define channels that bias fluid flow to be tangential to the rotor.

Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun.

A vibration element includes a substrate, a piezoelectric element including a piezoelectric layer and an electrode layer, and a bonding layer provided between the piezoelectric element and the substrate and comprising ceramic containing melted glass powder, wherein the vibration element causes the substrate to vibrate by vibration energy of the piezoelectric element to output the vibration energy of the substrate, and the piezoelectric element is fixed to the substrate via the bonding layer.

The invention provides a hydrogen production method and system by wind power, photoionization / grid connection, and relates to the technical field of wind power hydrogen production. The power supply ofthe hydrogen production device is a main wind power plant wind turbine generator set grid and an energy storage unit, and the energy storage unit is connected with a vertical axis wind turbine generator set of a hydrogen production plant and a photovoltaic battery panel as an auxiliary power generation unit; On the premise of meeting the demand of power grid, hydrogen is produced by utilizing theexcess electric energy of power grid. When the excess electric energy of power grid is too low, the electric energy of energy storage unit is released and supplemented for hydrogen production, so that the input power of a hydrogen production device is smoother and more stable. The hydrogen production device comprises an alkaline electrolytic cell and a solid oxide electrolytic cell. The inventionmainly solves the problem of wide power fluctuation of hydrogen production by wind power existing in the prior art, makes the input power of the hydrogen production device smooth, and improves the efficiency and service life of the hydrogen production device.

A digital motor control system utilizes time duration electric pulses generated by digital logic to control the motor speed and direction of rotation of a D.C. or A.C. motor. The digital logic produces width modulated pulses that can be connected to large or small electric motors by mechanical or electrical relays or switches to provide efficient motor control with little control circuit power loss. The mechanical or electrical switches are responsive to the digital logic to change motor direction or remove power from the motor windings. A variable control element such as a computer joystick can be utilized to control both direction and speed of the motor. The system can be configured as an open loop system or as a closed loop servo with a feed back element to control the rotational position of the motor.

A device includes a multiple quantum well with potential barriers and quantum wells, and an electric field element for applying an electric field thereto. The multiple quantum well includes at least two regions A and a region B disposed therebetween. The region A includes a plurality of energy levels, and a carrier is transported from a specific energy level i to a specific energy level f in the region A through one of the potential barriers by photon-assisted tunneling. The region B includes a plurality of energy levels, and an energy relaxation is performed with a relaxation time shorter than a transit time of the carrier in the region A from a specific energy level e to a specific energy level g in the region B. When an electric field is applied, electric current flows through the multiple quantum well and light is emitted or absorbed in the region A.

The invention discloses an oscillation wave partial discharge identifying and positioning method for an asynchronous double-end power cable. The method disclosed by the invention comprises the following specific steps: respectively installing oscillation wave partial discharge signal acquisition devices at the two ends of the cable; obtaining the voltage and partial discharge capacity signals at the two ends of the detected cable through data acquisition; recording and converting the corresponding data to obtain a waveform file which is needed for failure positioning; calling a partial discharge positioning algorithm to carry out the failure positioning; and computing the accurate position of a failure point generating partial discharge signals. The positioning analysis result obtained by the invention is more accurate; the error rate is small; the wave velocity does not need to be known, thereby reducing the errors caused by computing the wave velocity; the excessive manual intervention is needed; the problems of large data quantity, inaccuracy in positioning and the like because different pulses under the voltage of each experiment are matched are avoided; and the rapid and accurate failure positioning course of the method is beneficial to the timely repair of faulty lines and the reduction of loss caused by power failure.

An energy absorber is crushed upon receiving compressive load, thereby absorbing energy. The energy absorber has a first end and a second end with respect to a direction of the compressive load. The energy absorber is formed of fiber-reinforced resin. The fiber-reinforced resin includes a stack of fiber layers having a compression direction fiber layer. The compression direction fiber layer includes fiber bundles of filament fibers. The fiber bundles are arranged such that the extending direction of the fiber bundles has a component of the direction of the compressive load. The density of the fiber bundles is gradually increased from the first end to the second end. Therefore, compressive load required for crushing is prevented from increasing at an early stage of crushing.

The invention discloses a cladding die repair technology by a laser coaxial and synchronous power feeding method, which is characterized in that model data of a die repair area is imported, computer programming is utilized to plan the repair path, and the way of laser coaxial and synchronous power feeding cladding is adopted to accurately repair the die, which can achieve automatic production, andthe die can be directly used after repairing; the repaired die can achieve 80% of new product performance, which greatly shortens repair cycle and reduces maintenance cost. The cladding die repair technology by the laser coaxial and synchronous power feeding method has the advantages that the energy of the laser itself is stable, the heat affected zone of the substrate is small and the technologyis clean and environmentally friendly; in addition, the microstructure of the cladding repair layer is fine, and deformation is less likely to be generated after repairing the microscopic defects oflacking parts, thereby solving the problem that many conventional methods cannot process or are difficult to process, and easy achieving automatic rapid repair of workpiece, which greatly increase production efficiency and improve processing quality.

A workpiece processing system employs a common modular imaged optics assembly and an optional variable beam expander for optically processing multiple laser beams. In one embodiment, a laser and a fixed beam expander cooperate to produce a laser beam that propagates through a beam switching device to produce multiple laser beams that propagate along separate propagation path portions and subsequently merge into a common path portion through an imaged optics assembly and optional variable expander. The beam expander sets the shape of the laser beams in the form of a Gaussian spatial distribution of light energy. The imaged optics assembly shapes the Gaussian spatial distribution of the laser beams to form output beams of uniform spatial distribution. In an alternative embodiment, the beam switching device is removed and the laser beams propagate from separate laser sources associated with separate optional beam expanders.

This invention relates to an improved underpad system to be used underneath many types of surface coverings, such as synthetic turf, carpet, coating, tiles, etc. The system consists of three layers of material made from various components with different densities and thickness which provides a real absorption impact by a compression movement of the sandwiched layers.

A method of selecting a gateway node in a remote network and for handing over to the selected gateway node. Nodes in a remote energy aware network connect through a gateway node to a backbone network in an interplanetary communications network. Each node optimizes a stability function describing communications to neighboring nodes and to the backbone. Optimization is for maximum network stability and for efficient node energy consumption. Optimization identifies a handover time and nodes initiate handover sufficiently in advance of the identified handover time to complete at that time. Nodes continually monitor and update network characterization parameters to identify a next optimal handover time.

An apparatus for forming electrical solder connections in a disk drive unit includes: a nozzle device for carrying out soldering on two pre-welding surfaces; a solder ball feeding device for transferring a single solder ball to the nozzle device; a gas pump device for supplying pressurized gases to the nozzle device; a laser device for emitting laser beams to the solder ball,; and a control device including at least one sensor for at least detecting status of the solder ball or pressure in the nozzle device or distance between the nozzle device and the pre-welding surfaces, and a control unit connected with the at least one sensor. The present invention can easily control the solder ball, the pressurized gases and the laser beams, thereby keeping the pressure of the nozzle device and the laser energy stable and, in turn improving the soldering result.

A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing that information for adjusting dummy pulse time periods to compensate for the energy errors. Dummy pulses are laser pulses that are blocked from reaching a workpiece. A second way for providing constant pulse energies employs an AOM for varying amounts of laser energy passed to the workpiece. A third way of providing constant pulse energies entails extending the pulse period of selected pulses to allow additional laser cavity charging time whenever a dummy pulse is initiated.

The invention discloses a method for preparing a coating with a micro-nano composite structure through liquid plasma spraying. The method comprises the following steps of (1) adding solution salt and suspension liquid granules into a solvent to obtain a suspension liquid; and (2) delivering the suspension liquid to a flame flow generated by a plasma spraying gun through a non-atomizing nozzle, and praying the flame flow generated by the plasma spraying gun to a pretreated spraying matrix, thereby obtaining the costing with the composite structure on the spraying matrix. By using the method, the problems of coating performance reduction and invalidation caused by grain growth in a thermal barrier coating, a solid oxide fuel battery electrode coating, an air-sensitive coating of a medium-high temperature gas sensor and a high-temperature wear-resistant lubricating coating can be solved or partially solved.

An electrochemical energy source, comprising: a substrate, and at least one stack deposited onto said substrate, the stack comprising at least the active layers: an anode, a cathode, and an intermediate solid-state electrolyte separating said anode and said cathode. An electronic device provided with an electrochemical energy source according to the invention and a method for the manufacturing of an electrochemical source according to the invention.

The invention provides a shift register which can operate normally while suppressing a delay of signal and a rounding of waveform. The shift register of the invention includes a plurality of stages of flip-flop circuits each of which includes a clocked inverter. The clocked inverter includes a first transistor and a second transistor which are connected in series, a first compensation circuit including a third transistor and a fourth transistor which are connected in series, and a second compensation circuit including a fifth transistor and a transmission gate. According to the first compensation circuit, a timing at which a signal outputted from the flip-flop circuit rises or falls can be controlled in synchronization with an output of two stages before. The second compensation circuit can control a clock signal input can be controlled.

A laser beam switching system employs a laser coupled to a beam switching device that causes a laser beam to switch between first and second beam positioning heads such that while the first beam positioning head is directing the laser beam to process a workpiece target location, the second beam positioning head is moving to another target location and vice versa. A preferred beam switching device includes first and second AOMs. When RF is applied to the first AOM, the laser beam is diffracted toward the first beam positioning head, and when RF is applied to the second AOM, the laser beam is diffracted toward the second beam positioning head. A workpiece processing system employs a common modular imaged optics assembly and an optional variable beam expander for optically processing multiple laser beams.

An apparatus and method for wirelessly transmitting electromagnetic energy are provided. The apparatus includes a power source, a transmission unit, and a measurement unit. The power source supplies a power according to a certain frequency. The transmission unit receives the power to wirelessly transmit the received power through self resonance. The measurement unit measures a phase difference between a voltage and current of the transmission unit. The certain frequency is controlled according to the phase difference. Accordingly, the apparatus and method control only the frequency of the power supply when a resonance frequency is changed by the change of an ambient environment, thus enhancing energy transmission efficiency.

The electromagnetic-induction system of the present invention comprises: a central processing unit (CPU); an application specific integrated circuit coupled with the central processing unit; a plurality of analogy switches that are coupled with the central processing unit and the application specific integrated circuit, individually; an antenna loop coupled with a plurality of analogy switches. The application specific integrated circuit further comprises: a digital filter that can reduce bandwidth error; a programmable gain amplifier that has the gain range with over eight-level; a latch device that can access the data at steady state; a multiplier and a divider that consist of hardware to increase the report rate; a programmable frequency generator can output the signal with the stable frequency.

The invention relates to a method for measuring the acoustic impedance of an organism based on ultrasound steady state reflected waves, which comprises that (1) multiple frequency continuous baseband signals which are mutually orthometric are structured by using orthogonal frequency division multiplexing modulation mode; (2) an ultrasonic probe sends out the multiple frequency continuous baseband signals; (3) an ultrasound transducer detects reflected state echo signals; and finally the amplitude of reflected waves of a no uniform reflecting interface and phase difference opposite to incident waves are found out by solving equations set. A device realizing the method comprises an ultrasonic probe, a control unit, a transceiving unit, a processing unit and a display element which are respectively connected with the control unit. The ultrasonic probe is connected with the transceiving unit. The processing unit is respectively connected with the transceiving unit and the display element. The method has high calculation accuracy, good anti-interference, good anti-noise capability. Only one probe is needed, thus causing that the cost of development devices is reduced. And the measuring method is simple and can be used in vivo experiment.