773 results about "Pulse discharge" patented technology

An apparatus for forming a generally planar metal plate into a dish with a three-dimensional pattern is provided. The apparatus comprises a mold having a forming surface with a contour corresponding to said three-dimensional pattern, and having edges corresponding to boundaries of the dish, which edges are defined by side walls essentially perpendicular to the forming plane; a forming device comprising a fluid basin and pairs of electric discharge members within the fluid and having an opening facing the mold to allow transmission of a pressure wave from the fluid to the metal plate; and an electric discharge circuitry for discharging a short and intense electric current through the pairs of electric discharge members generating an electric spark or breakdown within the fluid to yield formation of plasma, vapor or both.

A surgical instrument includes an end effector having an actuation assembly to effect a surgical procedure when actuated. An electric motor has a rated operating voltage and is operationally connected to the end effector to operate the actuation assembly. A power supply is electrically connected to the motor and selectively powers the motor to actuate the actuation assembly at least 1 and less than 16 times during a clinical life of at least one of the end effector, the motor, or the power supply. The power supply has a battery cell with a critical current rate. When activated to power the motor and actuate the actuation assembly, the power supply operates the battery cell at a super-critical current rate during a non-zero super-critical pulse discharge period lasting less than approximately 16 seconds. The power supply operates the motor above the rated operating voltage during the super-critical pulse discharge period.

In one embodiment, a human-powered dry powder inhaler comprises a human-powered compressible component operable to discharge an air pulse at an outlet at a pressure of about 1-40 psi; an inflatable reservoir operable to receive an air pulse discharged from the human-powered compressible component to provide an aerosol of a dry powder pharmaceutical formulation in the reservoir, the reservoir including an outlet valve; and a receiving mask in communication with the outlet valve and operable to receive an aerosol of dry powder from the reservoir and to deliver the aerosol to at least a mouth or nose of a patient. In another embodiment, the inhaler comprises a human-powered compressible component operable to discharge an air pulse at an outlet of a polymeric pressure release valve at a pressure of about 1-40 psi; and a receiving mask in communication with the outlet of the compressible component and operable to deliver an aerosol of dry powder to at least a mouth or nose of a patient. Methods for delivery of a dry powder pharmaceutical formulation to a patient are conducted in the absence of electrical power and circuitry and pre-pressurized propellant gas. Suitable dry powder pharmaceutical formulations may include myo-inositol and/or maltodextrin as a carrier and active ingredients such as vaccines or siRNA.

The invention relates to a device for performing experiments by combining high-voltage pulse discharging and the traditional coal seam anti-reflection technology, in particular to a coal seam anti-reflection experiment device based on high-voltage electric pulse. The coal seam anti-reflection experiment device based on high-voltage electric pulse comprises a high-voltage pulse power supply, a first tube body, a second tube body, a third tube body, a rigid triaxial pressure chamber, a pressure testing pump, a hydraulic control system and a sound reflection preamplifier, wherein the first tube body, the second tube body and the third tube body are connected in sequence. The traditional hydraulic fracturing technology is simulated in the rigid triaxial pressure chamber, the high-voltage pulse power supply supplies power to a discharging electrode, therefore, the positions around a through hole of a coal sample fracture, a fracturing positions and an expanding process of the fractures in the coal sample are monitored all the time, critical factors affecting fracture development of the coal sample and state transformation of gas, an actuating range and effect laws of pulse discharging on fracture development can be obtained through the later CT scanning and electron microscopy observation results, and a theoretical foundation is provided for practical application of high-voltage pulse discharging into underground coal seam anti-reflection.

According to the present invention, a circuit and methods for enhancing the operation of SOI fabricated devices are disclosed. In a preferred embodiment of the present invention, a pulse discharge circuit is provided. Here, a circuit is designed to provide a pulse that will discharge the accumulated electrical charge on the body of the SOI devices in the memory subarray just prior to the first access cycle. As explained above, once the accumulated charge has been dissipated, the speed penalty for successive accesses to the memory subarray is eliminated or greatly reduced. With a proper control signal, timing and sizing, this can be a very effective method to solve the problem associated with the SOI loading effect. Alternatively, instead of connecting the bodies of all SOI devices in a memory circuit to ground, the bodies of the N-channel FET pull-down devices of the local word line drivers can be selectively connected to a reference ground. This would enable the circuit to retain most of the speed advantages associated with SOI devices while overcoming the loading problem described above. With this preferred embodiment of the present invention, the major delay caused by the bipolar loading effect is minimized while the speed advantage due to providing a lower, variable Vt effect is preserved. The overall body resistance of the individual devices has a minimal effect on the device body potential.

The invention discloses a rapid forming process of an iron phosphate lithium battery. The rapid forming process comprises the following steps: vacuumizing after the battery is assembled, and injecting electrolyte by several times, and sealing the battery; putting the battery into a thermostat, standing for 8-12 hours at 45-50 DEGC, turning or rotating the battery in a standing process so as to putting each face of the battery downwards for a certain time; after the standing, carrying out ultrasonic treatment on the battery for 10-20 minutes; putting the battery on a cabinet, and carrying out low-current step type charging excitation and intermittent pulse discharge on the battery; after the charging is finished, carrying out deflation and one time of vacuumizing on the battery in a glove box, and carrying out sealing, ageing and capacity grading. According to the rapid forming process, firstly a diaphragm, an anode piece and a cathode piece of the battery are adequately infiltrated by virtue of the electrolyte, and then the battery is simultaneously subjected to high-current step type charging and intermittent pulse discharge, so that the time of the forming procedure is substantially shortened, the equipment loss is reduced, the performance of the formed battery is excellent, and the formed battery has no difference from a battery formed by virtue of a traditional forming process.

The invention discloses a high-voltage cable insulation defect partial discharge on-line monitoring diagnosis method, which involves analyzing obtained partial discharge data of various actual manufacturing typical defects from the perspectives of time domain waveform characteristics, spectrum distribution differences, separate spectrum analysis and the like, and establishing a discharge database and a comparison database of the various defects. By use of a high-voltage cable partial discharge detection system, through utilizing signal separating technologies including a three-phase amplitude relation atlas, a three-frequency range amplitude relation atlas and the like, pulse current waveform parameter characteristic value integrated information is analyzed, a discharge accumulation spectrum of on-site measuring data and a same-kind characteristic pulsed discharge cluster are formed, and finally a comparison is made between the discharge accumulation spectrum and the same-kind characteristic pulsed discharge cluster and the discharge database of the various defects so as to determine whether insulation defects exist for an on-site running cable line. The method can solve the problem of difficult on-line monitoring diagnosis of insulation defect partial discharge of a conventional cable device, and also can improve the accuracy and sensitivity of high-voltage cable insulation defect partial discharge detection diagnosis.

The invention relates to unconventional gas reservoir permeability increasing methods, in particular to an electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method. The electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method comprises the following steps that a hole is drilled in an unconventional gas reservoir, and a discharge electrode is descended to the position of the reservoir with permeability to be increased through a winch; the drilled hole of the reservoir is sealed, and water is injected into the drilled hole of the reservoir through a water injection pipe to achieve the preset static pressure; discharge equipment is used for pulse discharge through the discharge electrode; after the discharge process is finished, the water in the drilled hole of the reservoir is drained, natural gas exhausting and mining equipment is connected, and then natural gas is collected through the natural gas exhausting and mining equipment. The high pressure pulse discharge and hydrofracture technology are integrated creatively, the cavitation effect of the high pressure pulse discharge and the instantaneous loading function of water shock are used for achieving the purposes of changing the existence state of natural gas, increasing the reservoir fracture, reducing weakening intensity, improving permeability and improving the exhausting and mining efficiency of natural gas. The electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method also has very wide application prospects on the aspect of unconventional gas exhausting and mining.

The invention discloses a method of room air purification with low temperature plasma generated by dielectric resistance discharging. The harmful gas of air can be wiped off by dielectric resistance discharging plasma which is in magnetic field: the needle plate electrode is the reaction electrode, the dielectric resistance discharging can be realized by inserting a dielectric-slab which is 1mm-5mm in thickness at the side of the plate electrode, the distance of the needle electrode is 6mm-30mm, the nanosecond frontal high-voltage narrow pulse power supply is applied to the two ends of the needle plate electrode, the voltage is 10kv-60kv, the permanent magnet is mounted on the two ends of the electrode; The harmful gas of air can be wiped off by pulse discharging plasma which is in magnetic field. At the base of parallel magnetic field, the harmful gas can be wiped off by the low temperature plasma generated by the nanosecond frontal pulse dielectric resistance discharging in the invention, so the purification efficiency is improved greatly.

The invention discloses a storage battery internal resistance measuring method. According to the invention, the storage battery internal resistance measuring method is based on heavy current millisecond pulsed discharge and includes the following steps: the storage batter generating a discharge loop which matches the capacity of the storage battery of discharge current via a design, performing a heavy current millisecond pulsed discharge, detecting in the pulsed discharge process the variation process of a terminal voltage and the discharge current of the storage battery, and based on the Ohm law, calculating the internal resistance of the storage battery. The method can accurately measure the internal resistance of the storage battery on-line.

Work piece processing is performed by pulsed discharges between an anode (2) and a magnetron sputtering cathode (1) in solid-gas plasmas using a chamber (2) containing the work piece (7). A system (12) maintains a vacuum in the chamber and another system (14) provides sputtering and reactive gases. The pulses are produced in a plasma pulser circuit including the anode and the cathode, the discharges creating gas and partially ionized solid plasma blobs (3) moving or spreading from a region at a surface of the cathode towards the work piece and the anode. A potential is applied to the work piece so that a pulsed current comprising biasing pulses arises between the second electrodes. In particular biasing discharges are produced between the anode and the work piece when said plasma blobs have spread to regions at the anode and at the work piece so that the pulsed current is the current of these biasing discharges. The method is efficient for processing or modifying surface regions of work pieces of various kinds and configurations and can be employed for achieving efficient work piece etching, interface mixing, surface and balk diffusion, gas absorption and desorption, initial and further stages of thin film condensation, and for performing ion plating.

The invention discloses a lead-acid cell grouping method, comprising the following steps: detecting and recording static the voltage of a cell; detecting and recording the internal resistance of the cell; carrying out transient pulse discharging for one or more times on the lead-acid cell at different currents and discharging times; recording one or more data of discharging terminal voltage, discharging volume and discharging energy each time; after discharging detection, grouping the cell according to the difference range of one or more parameters of static voltage, internal resistance, discharging terminal voltage, discharging volume and discharging energy. The grouped cell group has high uniformity and long service life; the method is simple; and the required test device is easily realized and has strong operability.

The invention relates to a method for sorting the consistency of lithium titanate single batteries. According to the method, both static performance parameters such as capacity, voltage and internal resistance and dynamic parameters such as polarization impedance, large-current charging-discharging capacity and self-discharging capacity are considered. The method comprises the following steps that1, primary sorting is carried out according to parameters such as discharge capacity, open-circuit voltage and alternating-current internal resistance; 2, secondary sorting is carried out after the single batteries undergo high-temperature standing for a period of time; and 3, third-time sorting is carried out on the single batteries subjected to secondary sorting by detecting high-rate pulse discharge conditions, and finally the lithium titanate single batteries with high consistency are obtained. According to the method, the problem that the consistency of single batteries in an existing lithium titanate battery system is difficult to sort is solved; the performance of the battery packs which are formed by the lithium titanate single batteries sorted through the method can be better than that of battery packs which are grouped through a common grouping method; and meanwhile, compared with an existing conventional sorting method, the sorting method is simple to operate, free of redundant equipment investment, short in testing time, and facilitates industrial popularization and application.

A process for producing high stability crystalline anodic aluminum oxide includes anodizing an anodic foil, hydrating the foil, and forming a barrier oxide layer on the foil. Anodizing the anodic foil produces nano-porous amorphous oxides which can then be converted to a crystalline precursor material by hydrating the foil. Next, an oxide layer formation step is utilized to form a barrier oxide layer on the surface of the anodized and hydrated foil. The resulting anodic oxides have very low levels of defects, voids and tensile stresses and have rise times as low as about 1 second to about 3 seconds after exposure of the formed samples to boiling water for 2 hours.

The invention discloses a discrete variable structure observer-based lithium battery SOC (state of charge) estimation method. The method includes the following steps that: a rapid calibration test is performed on a lithium battery, a relation curve of SOC and open-circuit voltage (OCV) is obtained; a lithium battery discrete state space model for SOC estimation is established; a pulse discharge test is performed on the lithium battery, the parameters of the lithium battery model are identified; the terminal voltage and charge-discharge current of the lithium battery under a real-time collection condition are obtained; and a discrete variable structure observer is constructed to estimate the SOC of the lithium battery accurately. The method not only has a good SOC estimation effect, but also can ensure convergence strictly, and exhibits strong robustness to lithium battery modeling error, internal parameter perturbation and external disturbance.

An electrostatic ion propulsion engine for satellites and spacecraft is equipped with an electron source for neutralizing the propellant gas ion beam or jet emitted by the engine. The electron source includes an anode housing, a hollow cathode tube with gas flowing therethrough, a cathode element at the outlet end of the cathode tube within the interior space of the anode housing, and a pin- or rod-shaped auxiliary electrode arranged along the lengthwise axis in the hollow cathode tube. An ignition pulse is applied to the auxiliary electrode relative to the cathode tube, which causes a pulse discharge in the cathode tube, and in turn ignites the gas discharge between the anode and the cathode which generates the electron current.

The invention discloses a screening method of the consistence of a lithium-ion battery pack. The method includes following steps: firstly, screening the consistence of the capacity of batteries; secondly, performing normal-temperature static placement for 48 h+/-4 h; thirdly, conducting grouped serial connection tests on the batteries, and recording initial voltage data V1 and a battery DC internal resistance DCIR1 of each battery; fourthly, performing normal-temperature aging for 14 days in the condition of 25 DEG C+/-3 DEG C; fifthly, recording voltage data V2 after battery aging, and screening the consistence of self-discharge rates of the batteries; sixthly, calculating a DC internal resistance DCIR2 of each battery, and screening the consistence of the internal resistances of the batteries; and seventhly, drawing a V-T curve of pulse discharging of the batteries, performing classification by regarding a dynamic voltage difference of 30 mV as an interval, and storing the tested batteries in a classified manner. According to the screening method of the consistence of the battery pack, based on the static consistence and the dynamic consistence of the batteries, the operation method is simple, the reliability of test results is high, and the practical condition of the battery pack is satisfied.