9 results about "Plasma cloud" patented technology

A disinfection system for generating direct plasma at sub-atmospheric pressure to treat an inner surface of a channel of a surgical instrument and a method thereof. The method provides: inserting the surgical instrument into an airsealable housing; positioning an elongate discharge electrode within the channel such that the elongate discharge electrode coaxially spans at least a majority of the length of the channel to define an annular ignition region within the channel; electrically coupling a collector with a conductive boundary sleeve of the surgical instrument; the air-sealable shell is airtight; reducing the pressure of the annular ignition region containing ambient air to sub-atmospheric pressure; and electrically igniting the ambient air of the annular ignition region of the channel by applying a potential difference to produce a longitudinal plasma cloud for sufficient disinfection.

The application discloses a kind of laser welding devices for gas cylinder, belong to high-pressure gas cylinder welding technical field, solve the technical problem of unstable welding quality of the existing gas cylinder welding method.Laser welding device, including laser welding mechanism, plasma cloud removal mechanism and exhaust mechanism, and the weld of laser welding mechanism is welded gas cylinder;The air outlet of plasma cloud removal mechanism is towards weld;Exhaust mechanism is communicated with the gas outlet of gas cylinder.Laser welding method for gas cylinder, comprising the following steps: providing the laser welding device for gas cylinder;Using laser welding mechanism to weld the weld of gas cylinder;Obtain the real-time gas pressure value in the gas cylinder during welding;According to the obtained real-time gas pressure value, make exhaust mechanism match corresponding exhaust rate.The present application can improve the welding quality stability during welding gas cylinder, improve welding quality, and then improve welding effect.

Provided are methods of immunizing a viewport of a medical device against fogging before or during a medical procedure, and related apparatuses and devices. The methods comprise applying plasma to the viewport prior to use, thereby rendering a surface of the viewport highly hydrophilic. The methods eliminate or at least significantly reduce blur due to fogging.

This utility model discloses a core-electrode type low-temperature plasma cloud purification element, relating to the field of air purification technology. It includes an inner electrode, an outer electrode, a dielectric layer, and a high-voltage power supply. The inner and outer electrodes are coaxially arranged, with the dielectric layer located between them. The inner electrode is made of stainless steel wire and serves as the high-voltage electrode. The outer electrode is a thin-walled aluminum alloy electrode and serves as the grounding electrode, and it has a gas flow channel. The high-voltage power supply is an AC power supply, electrically connected to the inner electrode. This utility model, through its single-element structure, achieves a uniform electric field and long lifespan: the coaxial arrangement of the inner and outer electrodes, combined with the air dielectric layer, makes the electric field distribution more uniform, avoiding electrode damage caused by excessive local discharge; the dielectric layer isolates the electrodes from direct contact, further extending the element's lifespan; and ozone concentration is controllable: the dielectric barrier discharge precisely controls electron energy, suppressing ozone generation.

The invention relates to a fan impeller welding system and a fan impeller welding process in the technical field of welding, a laser generator, an electric arc generator and an alternating electromagnetic field generator are all set to be in a pulse output mode, and laser pulses, electric arc pulses and alternating electromagnetic field pulses which are output in a discontinuous pulse mode are obtained; the periods and starting points of the laser pulse and the alternating electromagnetic field pulse are cooperated, so that each laser pulse period is matched with one electromagnetic field pulse period while arriving; setting the starting point of the arc pulse period to be matched with the starting point of the alternating electromagnetic field pulse period in a staggered manner; each pulse period is completed once as a cycle, and the starting point of each cycle is actively excited by a central control command signal. The alternating electromagnetic field pulse period and the electric arc pulse period are arranged in a staggered mode to avoid resonance, the laser pulse period and the alternating electromagnetic field pulse period are cooperated to improve the scattering effect of the plasma cloud cluster, and the yield and the quality upper limit are improved by actively controlling parameter reset blocking deviation accumulation of each pulse.

A disinfection system and methods thereof for generating direct plasma at sub-atmospheric pressure to treat an inner surface of a channel of a surgical device. The method provides for inserting the surgical device into a gas-sealable enclosure; positioning an elongate discharge electrode within the channel such that the elongate discharge electrode coaxially spans at least a lengthwise majority of the channel to define an annular ignition-region within the channel; electrically coupling a collecting electrode with the conductive circumscribing sleeve of the surgical device; gas-sealing the gas-sealable enclosure; reducing a pressure of the annular ignition-region containing ambient air to a sub-atmospheric pressure; and. electrically igniting the ambient air of the annular ignition-region of the channel by applying an electrical potential difference to produce a longitudinal plasma cloud sufficient to disinfect.

The invention discloses welding equipment for palletizing robot manufacturing, and relates to the technical field of welding, the welding equipment comprises a fixing mechanism, the fixing mechanism comprises a welding cabinet body, the upper end of an inner cavity of the welding cabinet body is provided with a welding cavity, the lower end of the inner cavity of the welding cabinet body is provided with a mounting cavity, and the top of the inner cavity of the mounting cavity is fixedly connected with a first motor; one end of a rotating shaft of the first motor is fixedly connected with a rotating disc; and the welding environment improving mechanism comprises an inert gas cylinder. A laser welding piece and an electric arc welding piece are integrated through the laser-electric arc hybrid welding mechanism, when the surface of a workpiece is irradiated through a laser beam with laser energy and high energy density, surrounding gas can be instantly ionized, a laser plasma cloud is formed, and the plasma cloud contains a large number of free electrons and ions and becomes a high-conductivity conductive channel; a low-impedance path is provided for ignition and stabilization of the electric arc, the electric arc is guided and gathered, and electric arc energy is guided to be accurately gathered.

The invention relates to a method for calculating the electron density of plasma cloud blocks of an ionized layer in the arctic region. The method comprises the following steps: step 1, determining calculation time and parameters of the plasma cloud blocks; step 2, acquiring solar activity data and geomagnetic activity indexes; 3, calculating background ionized layer electron density distribution when the ionized layer plasma cloud block structure is not considered; and step 4, determining an ionized layer plasma cloud block distribution area. According to the method provided by the invention, the influence of solar geomagnetic activity on the plasma cloud block of the ionized layer is fully considered, the spatial-temporal change rule of the structure is obtained according to early-stage data statistical analysis, the defect of an existing ionized layer model in plasma cloud block description is overcome, and an electron density distribution model considering the plasma cloud block is constructed; the precision of the ionosphere model is improved, the performance of a communication and navigation system is optimized, and the application effect of the ionosphere model in related fields is improved.