93results about How to "Shorten the propagation distance" patented technology

The invention discloses an electroluminescent device and a manufacturing method thereof. The electroluminescent device comprises a first electrode layer having transmissivity, a second electrode layer having reflectivity, a light-emitting layer arranged between the first electrode layer and the second electrode layer, and a second electrode layer contact layer adjacent to the second electrode layer; and the contact surface between the second electrode layer and the second electrode layer contact layer is a rough surface. According to the invention, the contact surface between the second electrode layer and the second electrode layer contact layer in the electroluminescent device is set to be a rough surface directly and lots of recessions and protrusions are distributed on the rough surface; and surface plasma waves are only be transmitted along the tangential directions of the contour lines of the recessions and the protrusions and thus the surface plasma wave propagation is limited and the surface plasma wave propagation distance is reduced substantially, so that the reflected light energy attenuation degree is reduced effectively.

The invention belongs to the technical field of non-destructive testing and relates to an ultrasonic testing method used for composite material foaming structures. According to the method, ultrasonic waves formed by a large number of shock pulse waves in the composite material foaming structures are utilized, and by constructing transfer functions of the ultrasonic waves in the composite material foaming structures, the arithmetical relationship between the ultrasonic waves and different part defects of the composite material foaming structures is set up to carry out defect discriminating and ultrasonic testing; the shock pulse ultrasonic waves of different types, intensities and frequencies and ultrasonic testing achieving methods can be selected, and the different composite foaming structures can be tested in an ultrasonic mode. Actual testing results show that the sensitivity, the resolution and the ability of composite material foaming structure testing are remarkably improved, the defects and the combination conditions of skin, skin / foam cementing areas, foam / foam cementing areas and foam areas can be tested accurately, the testing reliability is greatly improved, and the foam testing thickness can be 100 mm.

The invention relates to a wavelength conversion device, a light emitting device which comprises the wavelength conversion device and a projecting device comprising the wavelength conversion device. The wavelength conversion device comprises a light emitting layer and a reflecting layer which are arranged in a stacked manner. The light emitting layer comprises a first photoluminescence material and a first adhesive. The reflecting layer comprises a second photoluminescence material, a second adhesive and reflecting particles. Light emitted from the reflecting layer completely exits through the light emitting layer, and the light emitting layer and the reflecting layer are directly connected or connected through a sintering layer. On one hand, heat generated by the second photoluminescence material only needs to penetrate a part of the reflecting layer to be emitted, the heat spread distance is shortened, and meanwhile the reflecting capacity of the reflecting layer is retained; and on the other hand, the heat generated by the second photoluminescence material is reduced, the wavelength conversion device can work at a low temperature, and therefore the better light emitting efficiency is achieved.

The invention provides an ultrasonic surface wave velocity measurement system, which comprises an ultrasonic testing device connected with a control device and an oscilloscope separately, wherein the ultrasonic testing device is used for providing a focused transducer of which a probe is vertically downward with electricity, receiving a signal of the ultrasonic probe of the focused transducer and transmitting the signal to the oscilloscope; a sample cell is also arranged at the lower part of the focused transducer; the sample cell containing a liquid; the ultrasonic probe of the focused transducer is immersed into the liquid; and a drive mechanism is fixed on the sample cell and connected with the focused transducer. Only the ultrasonic surface wave velocity of an area of propagating an ultrasonic surface wave, namely the area opposite to the focused transducer is measured, and the propagation distance of the excited ultrasonic surface wave in the material is very small, so that detection of the residual stress of a local area is achieved; and the surface wave is excited by adopting the noncontact focused transducer, so that the residual stress of the surface of a curve structure can be measured, thereby achieving measurement of the residual stress of the curve structure.

The invention relates to the field of automatic target scoring equipment, in particular to a curve distribution type shock wave automatic target scoring system. The curve distribution type shock wave automatic target scoring system comprises a walking mechanism and a target frame assembly; the target frame assembly comprises a target rod, a mounting groove seat and a target plate; a sensor support is arranged in a groove cavity of the mounting groove seat, and sensors are arranged on the sensor support; the sensors are sequentially arranged along the same circumferential line, and the center of the circumference is located in the direction of the induction ends of the sensors; the center of the circumference is located on a connecting line of the middle sensor and the central point of target paper; when the circumferential line formed by the sensors is located on the minimum radius, the center of the circumference is located on the central point of the target paper; the target plate is in a square flat tube shape, and the sensor support is located in a cavity defined by the target plate and the mounting groove seat; and a splinter-proof plate for protecting the sensors is located on the face whether the face of the mounting groove seat is in the shooting direction. The curve distribution type shock wave automatic target scoring system is reasonable and reliable in structure, therefore, the working reliability of the equipment is ensured, and meanwhile, the target scoring precision and the target scoring efficiency are further improved.

To achieve a solid-state laser element capable of outputting a high-power laser, in a planar waveguide type solid-state laser element that causes a plurality of fundamental laser beams to oscillate in a direction of an optic axis within a flat plate-like laser medium, and forms a waveguide structure in a thickness direction of the laser medium, which is a direction perpendicular to a principal surface of the flat plate-like laser medium, the laser medium is separated in a principal-surface width direction of the laser medium, which is a direction perpendicular to the direction of the optic axis and the thickness direction of the laser medium, by a groove extending in the direction of the optic axis within the laser medium.

The invention discloses a combustion organization method of a methanol / alcohol hydrogen fuel internal combustion engine and application thereof. The combustion organization method comprises the stepsthat part methanol fuel of methanol fuel of tail gas waste heat is catalytically reformed or pyrolyzed on line is used for preparing alcohol hydrogen, and the main component of the alcohol hydrogen ishydrogen; part of the prepared alcohol hydrogen is supplied to an ignition chamber, and hydrogen-enriched mixed gas is formed; and ignition is achieved through a spark plug, a high-energy turbulent flame jet ignition source is formed, and a homogeneous thin mixed gas, formed through methanol and alcohol hydrogen jetted from interior of a gas inlet channel or a cylinder, in the cylinder is ignited. According to the invention, part of methanol fuel is converted into the alcohol hydrogen, the combustion organization method is adopted and is applied to the internal combustion engine, ignition reliability can be improved, the in-cylinder combustion process is accelerated, the antiknock property is improved, and the internal combustion engine adapts to higher compression ratios, so that thermalefficiency of the engine is improved, and hazard emission of nitrogen oxides, particles and the like is reduced. A modification experiment on a diesel engine of which the cylinder diameter is 210 mmshows that thermal efficiency is improved by 4%, emission of nitrogen oxides is reduced by 85%, and emission of particles is reduced by 95%.

The invention discloses a large-cylinder-diameter gas engine turbulent jet ignition system, a gas supply system and method, and the turbulent jet ignition system comprises a pre-combustion chamber which forms a spatial umbrella-shaped distributed ignition source in a main combustion chamber through a plurality of fluid passages; a sparking plug which is arranged on the pre-combustion chamber and used for igniting mixed gas in the pre-combustion chamber; a pre-combustion chamber gas injection valve which is connected with the pre-combustion chamber through a gas conveying pipeline and a one-way valve and used for injecting auxiliary gas into the pre-combustion chamber in a timed and quantitative mode. The gas supply system comprises a controller and the turbulent jet ignition system, and the controller is used for controlling gas supply of the pre-combustion chamber and fuel supply of the gas inlet channel of the main combustion chamber. Accurate stratified combustion can be formed between the pre-combustion chamber and the main combustion chamber; turbulent jet flow generated by mixed combustion in the pre-combustion chamber can form umbrella-shaped ignition source distribution in the main combustion chamber, the flame propagation distance is effectively shortened, and the combustion speed of mixed gas in the main combustion chamber is increased.

A spark-igniting engine combustion system is provided, which comprises: an electric control unit ECU, a high energy spark coil, a spark plug, an engine cylinder head and a hemispherical combustion chamber. Wherein, the spark plug is matched with the engine cylinder head and is positioned on the latter; the electric control unit ECU controls the high energy spark coil to facilitate the spark plug producing electric spark, so as to realize ignition in the hemispherical combustion chamber; the engine cylinder head adopts double spark plug structure; the electric control unit ECU adopts two suites of independent energy storage and ignition modules being respectively connected with the high energy spark coil; the varied ignition control strategy is adopted to control the ignition by the double spark plug. The invention is able to ensure the cold start or successful ignition of engine, enhance the combustion velocity and the rate of flame spread, organize the movement of air flow in the combustion chamber and assure full combustion in the engine, thereby improving the thermal efficiency of the engine and reducing the emission of tail gas.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. In some embodiments, the flowmeter includes a measurement section having a non-circular transverse cross-section in which one or more sensors for measuring flow are disposed. The non-circular measurement section can reduce distortion of ultrasonic waves, facilitate chordal measurements with flush-mounted transducers, and reduce the propagation distance between paired transducers. In some embodiments, the flowmeter includes a conditioning section with diametrically opposed longitudinal rib protrusions. The protrusions can reduce swirling flow, direct liquid components of a multi-phase flow towards the sidewalls of the flow path, and guide ballistic particles through the center of the flow path away from sensitive measurement devices.

The invention relates to a duct type multi-rotor tethered drone and a control system thereof, belongs to the field of drones, and aims to solve the problems that existing drones are short in flight duration and prone to crash due to the fact that the rotors of the drones are exposed. The duct type multi-rotor tethered drone is characterized in that the an inner central pipe is connected with an outer duct pipe through a group of guide vanes, a group of carbon fiber pipes is fixedly mounted on the outer wall of the lateral side of a block formed by central plates, the middle section of each carbon fiber pipe is fixed with the wall of the duct pipe, and an auxiliary rotor is mounted at the tail end of each carbon fiber pipe through an auxiliary motor; a hardware control system is mounted onthe upper surface of the central plate block, a main motor is coaxially mounted on the lower surface of the central plate block, the main motor drives a main rotor, and a power supply system is arranged beside the main motor; the hardware control system is connected with the main motor, a group of auxiliary motors, the power supply system, a video collecting unit and an automatic pilot, and a tether is connected with the hardware control system, the main motor, the group of auxiliary motors and the video collecting unit through the power supply system. The duct type multi-rotor tethered dronecan constantly work around the clock.

The present disclosure has an object to provide a specific communication technology for realizing effective communication with a flying object in a communication apparatus including the flying object. The communication apparatus includes a first base station, a flying object including a second base station, and a mobile terminal to communicate with the second base station. The first base station notifies flying object specification information that is information indicating that the second base station is included in the flying object. When the flying object specification information is received, the mobile terminal sets a direction of a beam for detecting the second base station to a second direction that is a direction vertically upward compared to a first direction that is the direction of the beam in a case where the flying object specification information is not received.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. In some embodiments, the flowmeter includes a measurement section having a non-circular transverse cross-section in which one or more sensors for measuring flow are disposed. The non-circular measurement section can reduce distortion of ultrasonic waves, facilitate chordal measurements with flush-mounted transducers, and reduce the propagation distance between paired transducers. In some embodiments, the flowmeter includes a conditioning section with diametrically opposed longitudinal rib protrusions. The protrusions can reduce swirling flow, direct liquid components of a multi-phase flow towards the sidewalls of the flow path, and guide ballistic particles through the center of the flow path away from sensitive measurement devices.

In a method for a diesel-gasoline dual fuel premixed charge compression ignition combustion system based on diesel compression ignition triggered ignition control of the present invention, air (+EGR gas) and a gasoline fuel supplied in a premixed charge intake stroke create a premixed surroundings, a diesel fuel injected in at least two classified steps in a succeeding compression ignition stroke creates a compression ignition combustion surroundings for a diesel and serves as an ignition trigger to produce flames, and the gasoline fuel injected in the premixed charge intake stroke and having created the premixed surroundings is burned in a succeeding combustion expansion stroke to generate power. Accordingly, a practical diesel-gasoline dual fuel powered engine solving both unstable combustion due to difficulty in control of ignition times and combustion and knockings restricting power performance can be realized.

The invention discloses a terahertz wave parametric oscillator based on the cascading parameter effect. After pump light emitted from a pumping source is subjected to bean shrink through a telescope beam shrink system, the pump light enters a MgO:LiNbO3 crystal after passing a reflector and a light beam scanner and is totally reflected in the MgO:LiNbO3 crystal; the pump light generates first-order Stokes light and terahertz waves in the MgO:LiNbO3 crystal through the optical parameter effect, the wave vector of the terahertz waves is perpendicular to the exit face of the MgO:LiNbO3 crystal, and the terahertz waves directly exit from the MgO:LiNbO3 crystal; the cascading parameter process can occur all the time, all orders of Stokes light have respective resonant cavities, the specific area of the side face of the MgO:LiNbO3 crystal is plated with an all-order Stokes light total reflecting film, and the terahertz waves are continuously amplified in the cascading parameter process. The wave vector of the pump light and the wave vector of all orders of Stokes light are both perpendicular to the exit face of the MgO:LiNbO3 crystal, the losses of the pump light and all orders of Stokes light are effectively reduced, the incident angle of the pump light is changed by changing the direction of the light beam scanner, therefore, the included angle between the pump light and the axis of the first-order stokes light resonant cavity is changed, frequency tuning output of the terahertz waves can be achieved, and operation is flexible.

The invention relates to radiological treatment equipment, a therapeutic target, a manufacturing method of the therapeutic target and a radiological treatment method. The thickness distribution of the therapeutic target along a linear direction is correlated with the distribution of the radiological dose intensity in an area to be treated, wherein the correlation mode lies in that the dose intensity of first intensity distribution is inversely correlated with the thickness of the therapeutic target along a linear direction. In the radiological treatment process, the radiological dose intensity of treatment ray transmitting from the thinnest part of the therapeutic target is highest so as to realize radiological treatment. According to the scheme, through improving the therapeutic target per se to realize the purpose of intensifying therapeutic ray, no extra intensifying equipment is introduced, and the errors caused by the intensifying equipment can be avoided so as to ensure that the dose intensity distribution of actual therapeutic ray meets the preset dose intensity distribution requirement. In addition, the therapeutic target solves the problem that existing intensifying equipment is complicated in structure, high in fault rate and high in maintenance cost, and is simple in self structure and relatively low in production cost.

The invention discloses a 90-degree optical mixer based on a hybrid plasmon waveguide structure. The 90-degree optical mixer is composed of a single 4*4 multimode interference coupler (MMI). The hybrid plasmon waveguide structure consists of a dielectric waveguide layer, a slit dielectric interlayer on the dielectric waveguide layer, and a metal layer on the slit dielectric interlayer. When lightenters the hybrid plasmon waveguide, the special structure of the hybrid plasmon waveguide can excite a hybrid plasmon mode and confines the mode in the slit dielectric interlayer so that the propagation distance under the same optical path can be greatly reduced and thus the size of the device is greatly reduced. Thus, compared with a conventional dielectric waveguide mixer, the 90-degree opticalmixer is reduced in size from millimeters to micrometers, provides a new structural solution for highly integrated photonic devices and has far-reaching effects on the further integration of photonicdevices.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. A flowmeter can include an elongate body having a first end and a second end and a flow path extending between the first and second ends along a longitudinal axis. An ultrasonic transducer can be disposed in a measurement section of the flow path and configured to emit ultrasonic waves into a material flowing through the flow path. First and second protrusions can be formed in a conditioning section of the flow path upstream from the measurement section, the first and second protrusions extending radially inward from a sidewall of the flow path and being configured to reduce swirling flow through the measurement section.

The invention provides an X-ray optical splitter and a mineral composition analyzer, belonging to the technical field of optical measurement. The optical splitter comprises an optical splitter shell, a crystal retainer, a curve optical splitter crystal, an incidence beryllium piece window, an emergence beryllium piece window, an incidence adjusting window and an emergence slit part, wherein the curve optical splitter crystal and the crystal retainer are arranged in the splitter shell, the curve optical splitter crystal is fixedly arranged on the crystal retainer, the incidence beryllium piece window and the emergence beryllium piece window are respectively arranged on the optical splitter shell at two sides of the curve optical splitter crystal, arc reflecting surfaces of the incidence beryllium piece window, the emergence beryllium piece window and the curve optical splitter crystal are distributed in a triangular way, the incidence adjusting window is arranged in the incidence beryllium piece window; and the emergence slit part is arranged on an optical path between the curve optical splitter crystal and the emergence beryllium piece window which are arranged in the optical splitter shell. The optical splitter shortens the X-ray transmission distance, reduces the absorption of X-ray by air in the transmission process, and can improve the resolution ratio and the measurement precision of the mineral composition analyzer.

The invention discloses a vortex type ultraviolet sterilizer. The vortex type ultraviolet sterilizer comprises a shell (3) and an ultraviolet sterilizing lamp (12), wherein the ultraviolet sterilizinglamp (12) is located in the shell (3); the exterior of the ultraviolet sterilizing lamp (12) is sleeved by an ultraviolet-permeable quartz sleeve tube (4); a water passing channel (5) is formed between the shell (3) and the quartz sleeve tube (4); a plurality of flow guide plates (7) are arranged in the water passing channel (5); the outer edge of one side of each flow guide plate (7) is providedwith a flow guide opening (6) used for guiding a water flow to pass through; the flow guide openings (6) of every two adjacent flow guide plates (7) are located at different sides; and the inner wallof the shell (3) and / or the surface of each flow guide plate (7) are subjected to polishing treatment to form ultraviolet reflecting surfaces (8). Compared with a conventional ultraviolet sterilizer,the ultraviolet sterilizer provided by the invention increases the ultraviolet irradiance by 10% to 20%, and has better sterilizing effect.

The invention relates to a small and medium-size triangular rotor engine double oil injection system, in particular to a small and medium-size kerosene triangular rotor engine double-oil-injector injecting method, and belongs to the field of triangular rotor engines. The system simultaneously adopts two oil injectors to inject kerosene, the kerosene required in the combustion process is mainly supplied by a first oil injector, and a second oil injector injects a small amount of fuel oil and achieves an igniting effect. The injecting time and oil injecting amount of each oil injector can be precisely controlled, spot dividing injection and time sharing injection are achieved, the good atomization effect is achieved while the large power-mass ratio of a rotor engine is kept, reliable igniting is achieved, the problems that a kerosene rotor engine is poor in atomization, low in combustion efficiency and high in emission are solved, and the performance of the small and medium-size triangular rotor engine is improved.

The invention relates to a waveguide display two-dimensional pupil expansion method based on a polarization holographic grating. Based on the polarization diffraction characteristic of a polarization body holographic grating, the polarization body holographic grating serves as a waveguide coupling element, and a light beam from a micro image source system is guided in and transmitted in a waveguide medium. And then two-dimensional pupil expansion and export of a transmitted image light field are completed through the composite polarization body holographic grating structure, and finally the transmitted image light field enters human eyes, so that a waveguide augmented reality imaging function is realized. The excellent polarization diffraction characteristic of PVG is utilized, only two grating areas need to be used in a waveguide pupil expanding structure, the waveguide area is greatly reduced, the light beam propagation distance is correspondingly reduced, the size and weight of a waveguide device are reduced, meanwhile, loss and scattering of light beams in waveguides are further reduced, and the light beam propagation efficiency is improved. And the final imaging effect is improved.

The invention relates to the technical field of rail train communication, in particular to a rail train multiple-input-multiple-output wireless optical communication system. The system comprises a vehicle-mounted network unit and a signal box. At least two light receiving devices are arranged on the outer side of the top of each train compartment. An optical splitter and at least two light emitting devices are arranged on a cross arm of each overhead contact system hard crossing supporting column above the rail, a signal box is arranged on any overhead contact system hard crossing supporting column in every N overhead contact system hard crossing supporting columns, and a train-mounted network unit is arranged in a train carriage. According to the invention, the light beams emitted by thetwo light emitting devices on the cross arm of the same overhead line system hard cross strut carry the same data stream; the frequency spectrum utilization rate is doubled compared with a diversity mode, the light beams emitted by the light emitting devices on the cross arms of the different overhead line system hard crossing supporting columns carry different data streams, the wavelengths are different, and the problem of interference between wireless light beams is effectively solved.

The embodiment of the invention discloses a production method for an integrated cylinder cover, which includes the following steps that: aluminum alloy is selected; the aluminum alloy is forged into a blank; and an admission passage and an exhaust passage are machined on the blank. As shown in the technique scheme, since the aluminum alloy with high strength and high heat resistance is forged and machined into the cylinder cover, the cylinder cover can meet the mechanical requirements of a cylinder cover for racing cars, that is, the tensile strength is larger than 350MPa, the elongation is larger than 10 percent, and the rigidity HB is larger than 110. On the other hand, because a combustion chamber corresponds to two spark plug holes, when two spark plugs of the same type are mounted, the two spark plugs can simultaneously ignite, consequently, the transfer of flame in the combustion chamber is accelerated, the transfer distance of flame is shortened, and thereby fuel oil-mixed gas can rapidly burn in a short time and in a short distance in the combustion chamber. According to the energy conversion principle, when the mixed gas is compressed to a top dead center, the temperature of a mixer in the combustion chamber is high, so that the mixed gas can be instantly ignited and burnt out, and thereby the energy utilization rate can be greatly increased.

A light guide composition includes a substrate and a first microstructure layer. The substrate has a first main surface. The first microstructure layer is disposed on the first main surface. A refractive index of the substrate with respect to a first light wavelength is greater than a refractive index of the first microstructure layer with respect to the first light wavelength, a refractive index of the substrate with respect to a second light wavelength is smaller than a refractive index of the first microstructure layer with respect to the second light wavelength, and the first light wavelength is smaller than the second light wavelength.

The invention discloses a high-ignition-point fuel compression ignition and combustion regulation and control device based on flame jet flow control. The high-ignition-point fuel compression ignition and combustion regulation and control device comprises a spark plug (1), a pre-combustion chamber ejector (2), a main combustion chamber ejector (3) and a pre-combustion chamber body (4). The pre-combustion chamber main body (4) is arranged on the main combustion chamber (6), a pre-combustion chamber cavity (5) is formed in the pre-combustion chamber main body (4), the pre-combustion chamber ejector (2) and the pre-combustion chamber spark plug (1) are installed at two different positions on one side of the pre-combustion chamber main body (4) respectively, and the head of the pre-combustion chamber ejector (2) and the head of the pre-combustion chamber spark plug (1) extend into the pre-combustion chamber cavity (5). The pre-combustion chamber cavity (5) is communicated with the main combustion chamber (6) through a spray hole; the main combustion chamber ejector (3) is fixed to the other side of the pre-combustion chamber body (4), and the head of the main combustion chamber ejector (3) extends into the main combustion chamber (6). The use performance of the low-carbon zero-carbon fuel can be effectively widened, and wide popularization and application are facilitated.

The invention aims to provide an engine capable of directly injecting natural gas for multiple times under high pressure in a cylinder and a layered rapid combustion method thereof. The engine comprises an air cylinder cover, an air cylinder wall, a piston, an air inlet channel, an air inlet valve, an exhaust channel, an exhaust valve, a high-pressure natural gas injection valve, a high-pressure natural gas supply pipeline and a spark plug, wherein the cylinder cover, the cylinder wall and the spark plug form a combustion chamber, the combustion chamber is hemispherical, the air inlet channel,the exhaust channel, the high-pressure natural gas injection valve, the high-pressure natural gas supply pipeline and the spark plug are arranged in the cylinder cover, the high-pressure natural gassupply pipeline is connected with the high-pressure natural gas injection valve, the air inlet valve is arranged in the air inlet channel, the exhaust valve is arranged in the exhaust channel, and thehigh-pressure natural gas injection valve is located between the air inlet channel and the spark plug. The engine is advantaged in that layered combustion of different gradients under different loadscan be achieved, the ignition stability of the natural gas engine is guaranteed, economical efficiency and dynamic property of the engine are effectively improved, and emission is reduced.

The embodiment of the invention discloses a complementary metal oxide image sensor, an image processing method and a storage medium. The CIS comprises a semiconductor substrate, a sub-wavelength pixelunit, and a reading circuit; the sub-wavelength pixel unit is arranged in the semiconductor substrate and is connected with the reading circuit; wherein the sub-wavelength pixel unit comprises n PD columns; N is an integer greater than or equal to 0; N size parameters corresponding to the n PD columns are determined by preset wavelengths; and the n PD columns absorb and convert the incident lightaccording to the preset wavelength to obtain an electric signal corresponding to the incident light.

The invention adopts a radio frequency gas discharge manner to excite the inert gas plasmas and provides a device for generating a vacuum ultraviolet light source. The device comprises four parts: a central cylindrical shaped interaction cavity, a coaxial circular power charge light source cavity, a radio frequency spiral resonance excitation cavity and an ultrahigh vacuum flange connection component. The device uses a circular tube made of magnesium fluoride crystal materials as its optical window; the vacuum ultraviolet light is generated in the coaxial circular power charge light source cavity on the outer wall of magnesium fluoride circular tube, then penetrates and is radiated into the central cylindrical shaped interaction cavity so that the light could act on a target material directly. In this manner, the travel distance of the light rays is shortened; the effective size of the light source is increased; the beam-divergence angle is reduced; and the utilization efficiency of the light source is increased. According to the invention, the device adopts an electrodeless radio frequency charge manner to excite the gas plasmas, and produces vacuum ultraviolent photons with specific wavelengths by filling different inert gases. Through the adjustment of the parameters of the gases like gas pressure, radio frequency and power, it is possible to adjust the output power of the vacuum ultraviolet light so as to meet the requirements of various applications on the light source.

The invention relates to a partial discharge positioning device and method for an ultra-long power distribution cable. The device comprises a pulse signal generator, an oscillating wave voltage generator and a signal receiving device which are arranged at the head end of the cable, and a plurality of capacitive sensors arranged on spaced cable joints, wherein the capacitive sensor comprises a coupling unit, a signal acquisition module and a 4G module, the coupling unit is composed of a high-voltage coupling capacitor and an RLC coupling circuit, signals acquired by the signal acquisition module are transmitted to the signal receiving device through the 4G module, the high-voltage coupling capacitor is pre-buried between a cable joint grounding copper net and an outer semi-conductive layer,and an external wire is connected in series with the RLC coupling circuit. According to the device and the method, the defects that pulse echoes are difficult to detect and positioning is greatly influenced due to the fact that the length of the cable is too long and partial discharge signals are attenuated seriously are effectively overcome.