1371 results about "Dynamic energy" patented technology

A driving tool having a driver, a power source, a sensor and a controller. The power source selectively provides an input to the driver to cause the driver to translate along an axis. The sensor senses a condition in the power source that is indicative of a level of kinetic energy of an element in the power source and generates a sensor signal in response thereto. The controller is coupled to the power source and the sensor and is responsive to the sensor signal for deactivating the power source to inhibit the power source from providing the input to the driver when the level of kinetic energy of the element in the power source is below a predetermined threshold. A method for operating a driving tool is also provided.

Disclosed are a method for measuring quantity of exercise and an apparatus comprising an acceleration sensor for generating acceleration information by measuring the quantity of exercise according to user movement, sensor control unit for supplying power to the acceleration sensor and sampling the acceleration information generated from the acceleration sensor, a dynamic energy measurement unit for converting the sampled acceleration information into dynamic energy, comparing a local maximum value with a predetermined threshold value if an ascending gradient of the dynamic energy has the local maximum value exceeding a predetermined value and determining a user step if the local maximum value exceeds the predetermined threshold value, a calorie consumption measurement unit for calculating calorie consumption by analyzing an energy level of dynamic energy determined as a user step, a memory for storing information, and a display section for displaying information related to the number of steps and calorie consumption.

A user's personal biometric information such as age, sex, weight, height as well as the user's lifestyle information, such as daily caloric input, job description, smoker status and physical fitness, is uploaded onto a host computer. Target heart rate, energy and / or caloric consumption levels related to desired fitness and weight loss goals for a particular individual are then selected having regard to fitness levels for an individual of comparable age, and consuming similar calories are then downloaded to a caloric monitoring unit. The caloric monitoring unit is provided for measuring the user's heart rate and dynamic energy and / or caloric expenditure over one to four weeks. The caloric monitoring unit includes a heart rate monitor, a unit accelerometer, a global positioning system (GPS), and an audio and / or video output. The audio / video output is operable to provide information and / or motivational prompts to the user in the event the heart rate, energy expenditure and / or caloric expenditure falls below or exceeds pre-selected target expenditures over a particular time segment of the selected time period having regard to the calories which are consumed. A display provides a continuously updated visual indication of whether or not the use has achieved the pre-selected optimum caloric burn or energy expenditure for that particular time segment. An internal calendar / clock, a processor and / or memory in the caloric monitoring unit compares measured heart rate and energy expenditures for multiple time segments against target levels stored as the user-specific fitness programme tailored to achieve the desired weight loss. The comparison is then used to generate compliance output data to either the user and / or a nutritionist.

A low drag ducted ram air turbine generator and cooling system is provided. The ducted ram air turbine generator and cooling system has reduced drag while extracting dynamic energy from the air stream during the complete range of intended flight operating regimes. A centerbody / valve tube having an aerodynamically shaped nose is slidably received in a fairing and primary structure to provide a variable inlet area. An internal nozzle control mechanism attached to the valve tube positions nozzle control doors to provide variable area nozzles directing air flow to the turbine stator and rotor blades to maintain optimum generator efficiency. An alternate embodiment includes an annular internal nozzle having interleaved panels to modulate the air flow to the turbine.

A method and apparatus for forming nonwoven melt spun webs by spinning a curtain of filaments into a pressurized chamber where they are contacted with pressurized quenching fluid, then using the fluid to draw the filaments through a slot at the bottom of the chamber. The slot is a narrow two dimensional impingement point running the length of the filament curtain where the pressurized quench fluid passes through, escaping to atmosphere. The fluid pressure (potential) energy in the chamber is exchanged for velocity (kinetic) energy at the slot impingement point. The fast moving stream of fluid inside and exiting the slot acts to pull, or draw the filaments through the slot. The fluid and fiber stream is deposited onto a porous collection conveyor belt, forming a fleece web. The invention is more efficient, less complicated, easier to maintain and easier to control than prior systems for melt spinning nonwoven webs.

The present invention provides a method for measuring quantity of exercise and an apparatus comprising an acceleration sensor for generating acceleration information by measuring the quantity of exercise according to user movement, sensor control unit for supplying power to the acceleration sensor and sampling the acceleration information generated from the acceleration sensor, a dynamic energy measurement unit for converting the sampled acceleration information into dynamic energy, comparing a local maximum value with a predetermined threshold value if an ascending gradient of the dynamic energy has the local maximum value exceeding a pre-determined value and determining a user step if the local maximum value exceeds the predetermined threshold value, a calorie consumption measurement unit for calculating calorie consumption by analyzing an energy level of dynamic energy determined as a user step, a memory for storing information, and a display section for displaying information related to the number of steps and calorie consumption.

The invention discloses a radial-flow type fluidic pressure wave supercharger, which can realize the energy exchange between the high pressure gas and the low pressure gas by running the pressure wave, avoid loss of mixed and diffused energy and has the advantages of high isentropic efficiency, low rotating speed, operability with liquid, sufficient exhaust and on the like. For adopting a pressure oscillating tube channel with variable rectangular cross-section, the incidence loss and the flowing loss of the jet flow are reduced; the channel is a bending flow channel arranged along the radial radiation, the process of expanding and compressing is strengthened and the sufficient discharge of the compressed gas is accelerated by using the centrifugal force; pressure balancing holes are arranged in the machine, so that the performance is kept balanced at the different pressure ratios; a pressure expanding flow guider is arranged at a compressed gas outlet in order to transform the dynamic energy of the gas flow effectively. The radial-flow type fluidic pressure wave supercharger can fully utilize the pressure energy in the production process and the pressure energy in the stratums of natural gas, thereby providing an efficient device selection for utilizing the pressure energy sources effectively.

A gearbox condition monitoring system comprises at least one vibration sensor located on a gearbox casing. A processing unit is coupled to the vibration sensor and is configured to receive signals representative of the detected vibrations from the vibration sensor. The processing unit may be operable to process the signals representative of detected vibrations of gears and bearings and to compute at least one dynamic energy index or location of fault.

Enclosed is an active and reactive coordination control method for permanent-magnet direct-driven wind turbines in the low-voltage ride-through process. Two different control strategies are employed for a grid side converter according to amplitude change of power grid voltage: when the power grid voltage is in a normal state, the grid side converter is in an active-priority maximum power tracing control mode so that the wind turbines capture wind energy to the maximum extent; when the power grid voltage is beyond the normal range, the grid side converter is in an active priority control mode so that the dynamic reactive current which is injected into an electricity system meets the requirements of grid combining. An engine side converter is in a direct-current voltage control mode based on rotor energy storage, power unbalance of the direct-current side of the engine side converter is relieved and the direct-current voltage is stabilized by utilizing the self rotating speed of the permanent-magnet direct-driven wind turbines and the change of the kinetic energy. The active and reactive coordination control for the wind turbines before or after the sudden change of the power grid voltage is realized according to the amplitude change of the power grid voltage, the fluctuation of the direct-current bus voltage is restrained by releasing or storing the rotor kinetic energy, so that the low-voltage ride-through capability of the permanent-magnet direct-driven wind turbines is improved, reactive power support is rapidly and accurately provided for the power grid, and certain support is given to restoration of the power grid voltage.

A system for use in monitoring, measuring, computing and displaying the Kinetic Energy generated and experienced while aircraft are executing either normal, overweight or hard landing events. Pressure sensors and motion sensors are mounted in relation to each of the landing gear struts to monitor, measure and record the impact loads and aircraft touch-down vertical velocities experienced by landing gear struts, as the aircraft landing gear initially comes into contact with the ground. Velocity adjustments are made to correct for errors caused by landing gear per-charge pressure and landing gear strut seal friction. The system also measures the landing loads experienced by each landing gear strut during the landing event and determines if aircraft limitations have been exceeded.

Energy-efficiency related data corresponding to dynamic energy-efficiency related operational parameters of a vehicle are collected from in-vehicle sensors and energy-efficiency parameters may be computed therefrom. The energy efficiency-related parameters and energy-efficiency parameters are then transmitted either directly of through a wireless and / or network link(s) to a station at which a transaction with a vehicle operator may be performed. An incentive based on efficiency of vehicle operation is computed and awarded to provide feedback to a vehicle operator to provide information concerning efficient vehicle operation and to encourage efficient and environmentally responsible vehicle operation. Both energy efficiency and environmental effects may be displayed at the station or substantially continuously and in substantially real time within the vehicle.

A cross-layer design architecture is provided for logical superposition coded (SPC) modulation for last-hop wireless data, aiming to overcome the effects of multi-user channel diversity in wireless video multicast. The proposed approach generates a logical SPC modulated signal by mapping successively refined information bits onto layered modulation through dynamic energy allocation and phase keying assignment, which mimics the superposition process for multiple modulated signals in convention hardware-based SPC modulation. At the receiver end, the received logical SPC signal is decoded by implementing a software-based approach on common demodulators without going through the signal-interference cancellation (SIC) process that is necessary in the conventional approach. The approach presented provides comparable or even better overall system throughput than by using the conventional hardware and SIC-based SPC modulation under various scenarios of different histograms of user channel conditions and power allocations for base and enhancement layer information.

A method and device for converting fluidic kinetic energy into oscillatory mechanical motion is disclosed. A mechanical structure of finite stiffness is coupled to a fluid-dynamical control surface the thrust from which is oscillated in direction. The coupling thereby induces oscillations in the structure, the magnitude of which can be controlled by the degree of mechanical resonance between the oscillation rate of the fluidic thrusting and the structure's resonance frequency. The resulting mechanical energy can be converted into electrical energy using either piezo-electric or electromagnetic means.

The invention provides control methods and systems for harvesting energy from a variable-output power apparatus. One or more variable-output power elements configured for producing energy are used as input to a power regulation circuit operably coupled between the power elements and a load. One or more power signals in the circuit are monitored and the power regulation circuit output is dynamically adjusted based on the one or more monitored power signals. According to aspects of the invention, the output duty cycle or frequency may be adjusted in response to monitored parameters.

The invention relates to a combined type rubber shock absorber and belongs to the technical field of rubber vibration isolators. The combined type rubber shock absorber is mainly used for vibration and buffering processing of electronic equipment or instruments. The combined type rubber shock absorber comprises a rubber anti-vibration pad, a rubber anti-vibration column, a metal limiting lining and a metal limiting gasket. According to the combined type rubber shock absorber, vibration and impact energy is translated into heat energy and deformation energy of rubber materials through the deformation of rubber parts by means of a combined shock absorber structure, the rubber anti-vibration pad is capable of reducing dynamic energy of an instrument with vibration to be isolated in the axial direction, the rubber anti-vibration column is capable of reducing dynamic energy of the instrument with the vibration to be isolated in the radial direction, the metal limiting lining and the metal limiting gasket are used in a matching mode, dynamic displacement of the shock absorber is limited due to the fact that the shock absorber is installed on a base plate of the instrument through bolts, and then an installation function and a limiting function are achieved.

The disclosure provides an approach for determining simplified models of humanoid robots. A simplification application linearizes a robot model around a nominal state and performs a singular value decomposition of an inertial term of the model, selecting singular values and corresponding singular vectors to be kept in an inertial term of a simplified model by matching a kinetic energy of the original model to a kinetic energy of the simplified model. Further, a gravitational forces term and a velocity-dependent forces term may be determined by computing active joint torques at sample poses around the nominal pose and solving for the gravitational forces term and the velocity-dependent forces term. A mapping from the simplified model to the original model may be determined using, e.g., numerical optimization.

The invention discloses a low-frequency oscillation disturbance source positioning system and a method of a double-fed fan grid-connected system belonging to the technical field of power system stability analysis. The system comprises a sequentially connected information acquisition module, an oscillation source positioning module and an oscillation source position output module. The method comprises acquiring network structure parameters of a grid-connected system of a double-fed fan with virtual inertia control, The dynamic energy model of doubly-fed wind turbine with virtual inertia controlis constructed by injecting bus voltage, generator node current and load node current into the system. The dynamic energy of the components or branches in the oscillation process is obtained, and thepositive and negative and changing trend of the dynamic energy are judged to trace the disturbance source of the low frequency oscillation. A low-frequency oscillation disturbance source position canbe accurately locate by that invention, the function of the fan related control link in the low-frequency oscillation is taken into consideration, and the possible influence on the fan disturbance source is analyze.

The present invention relates to a random energy management method of double energy source mixed power automobile, belonging to the field of dynamic energy distribution method of mixed power automobile. Said method includes the following steps: firstly, inducing statistic law of actual power from lots of vehicle road running records, obtaining condition transfer probability matrix of power required by driver and obtaining single-step cost of conversion between arbitrary conditions, and creating Markov random model of power required by driver, then utilizing said Markov random model to make calculation and obtain optimum control quantity of energy output.

A device for generating helical electron beams that can be used for radiation therapy is disclosed. The device contains a tertiary collimating cone that can be attached to a gantry of a linear accelerator or placed directly below the gantry. The tertiary collimating cone has a dynamic energy compensator and a magnetic electron collimator to modify the energy of electrons and to generate a helical trajectory. A multileaf collimator may be present within the tertiary collimating cone. A computer coordinates the movements of various components. The helical electron beam produced by this device can be targeted to tumors better and safer and reduce the amount of radiation hitting normal tissue than current devices.

An improved ball rebound device which will deliver a playground type ball such as a soccer ball, basketball, or kick ball which is propelled against the device, back to the user with surprising speed and distance. This ball rebound device utilizes a series of monofilament nylon elastic cords which are independently stung back and forth in a basket-weave fashion within a rectangular frame as a tennis racket is strung. This enables the device to more efficiently convert the kinetic energy of the ball into a powerful rebound back to the user. One embodiment of the device has within its frame the capability for adjustment of the tension of the cords to keep them operating at the desired tension. Another embodiment of the device has the capability for its frame to be adjustably oriented at various angles to the user to better suit the individual practice needs of the user.

The invention relates to a viscous damper with an axial spacing device, which comprises a left spherical hinge seat, a piston rod, a piston, a damping cylinder body, a balancing bar, a right spherical hinge seat, damping medium, a combined disk spring, a spacing cylinder body, a pressure ring A, and a pressure ring B. The spacing cylinder body is arranged between the damping cylinder body and the right spherical hinge seat, internal threads are arranged at two ends of the spacing cylinder body, the left end of the spacing cylinder body is connected with the damping cylinder body via the pressure ring A, the right end of the spacing cylinder body is connected with the right spherical hinge seat via the pressure ring B, the length of the balancing bar is extended into the spacing cylinder body, a threaded small circular cylinder is arranged at the right end of the balancing bar, and the combined disk spring is installed on the small circular cylinder. Compared with the prior art, the inventive viscous damper can meet the technical requirements on dynamic energy dissipation for shock resistance, and meet the technical requirements on static load and excessive displacement limit.

An ejector pump is provided which works to use dynamic energy of a jet of a main fluid emitted from a nozzle to suck a sub-fluid therein. When it is required to stop the ejector pump, the needle is moved to bring a sealing surface formed on a head thereof into abutment with a sealing surface formed around a main fluid flow path extending inside the ejector pump to close the main fluid flow path, thereby inhibiting the fluid pressure from acting on any downstream device. Upon the abutment, the needle is kept away from a nozzle, thereby avoiding undesirable wear or deformation of the needle and nozzle.

A dynamic network for energy-distribution can comprise energy converters, communication-and-control modules, power distribution switches, energy storage batteries, light emitters and light receivers located at spatially separated sites connected by optical transmission media, wherein each site can be equipped with energy transmitting, receiving or storage functionalities as well as signal-communication functionalities. The topology of the energy-distribution network can be changed dynamically by activating or deactivating optical links among the sites via software control. Charging vehicles can act as moving sites to remotely deliver energy to or receive energy from devices located at different sites of a network.

A method for controlling operation of a propulsion system of a waterborne vessel, comprising adjusting recovery of energy generated from the propulsion system to maintain position of the waterborne vessel in response to at least an indication of vessel position.

A gearbox condition monitoring system includes at least one vibration sensor located on a gearbox casing. A processing unit is coupled to the vibration sensor and is configured to receive signals representative of the detected vibrations from the vibration sensor. The processing unit may be operable to process the signals representative of detected vibrations of gears and bearings and to compute at least one dynamic energy index or location of fault.

The invention discloses a successive approximation analog-digital converter structure and a low-power-consumption switch method thereof. Compared with a conventional full base plate sampling technology, the successive approximation analog-digital converter structure has the advantages that only one pair of bootstrapped sampling switches is needed by a highest-order capacitor bottom plate sampling technology, so that the accuracy of a successive approximation analog-digital converter is increased; the switching area is reduced; and the power consumption is lowered. Through adoption of the switching method provided by the invention, energy is not consumed during generation of first two orders in a switching process. Moreover, only a common-mode voltage V<cm>=(1 / 2)V<ref> is taken as a reference voltage, so that dynamic energy consumption in the switching process is lowered greatly. Redundant bit capacitors are introduced into conversion of a capacitor array digital-analog converter, so that the total area of the capacitors is reduced greatly, and the switching energy consumption is further lowered. The successive approximation analog-digital converter structure is suitable for a high-accuracy low-power-consumption successive approximation analog-digital converter, and has a very good economic benefit.

The invention discloses a test system and a test method for an underwater explosion impact equivalent loading experiment. The test system comprises a bullet emission system, a bullet speed measurement system, a water target cabin system and a pressure measurement system, wherein the dynamic energy of a bullet is converted to an impact load in a water target cabin by colliding the bullet with the water target cabin system, finally the impact load is loaded on a test piece to be tested, and a pressure time interval is measured by the pressure measurement system. The test system and the test method disclosed by the invention are capable of greatly realizing equivalent underwater explosion equivalent loading in laboratory conditions, and has the advantages of being high in controllability, simple to operate, low in experiment danger, high in repeatability, low in experiment cost, and the like.

The invention discloses an energy optimization and control method of a four-engine double-paddle hybrid power propelling system used for carrying out energy optimization and control on the four-engine double-paddle hybrid power propelling system so as to select and switch 8 station modes. The energy optimization and control method comprises a shipping station recognition process, a load status recognition process and a dynamic energy control process, wherein the shipping station recognition process is to obtain an existing shipping station R by adopting a fuzzy neuroid method, the load status recognition process is to compare an existing load with a light load, a middle load and a heavy load to obtain an existing load status L, and the dynamic energy control process is to preliminarily select control parameters of parts according to the existing shipping station R and the load status L, and optimally distribute system energy and switching to an optimal shipping station by adopting energy management based on a dynamic programming method, so as to realize optimal management and control of energy, and reduce fuel oil consumption and exhaust gas emission furthest when the performance of a dynamical system of the ship is ensured.