37results about How to "Uniform energy density" patented technology

The invention discloses a solar heat collecting device, comprising at least one heat collecting module, wherein each heat collecting module comprises a hollow container with an inlet and an outlet, a flow controller is arranged between the hollow container and an inlet main pipe and/or an outlet main pipe; each heat collecting module also comprises at least one temperature sensor and/or a light intensity sensor which is in communication connection with a control system and is used for measuring the temperature and/or illuminated light intensity value of the hollow container; and the control system comprises a feed-forward control unit which generates feed-forward regulating signals for regulating each flow controller after analyzing and calculating according to the temperature and/or light intensity value of each hollow container, thereby changing the quantity and/or rate of flow of a heat-absorbing working medium flowing into the corresponding hollow container, and enabling the heat-absorbing working medium at the outlet of each heat collecting module to reach the preset pressure value and temperature value. The solar heat collecting device disclosed by the invention ensures thatthe pressure and temperature of the heat-absorbing working medium at the outlet of each heat collecting module are uniform, control signal lag is eliminated, and the generating efficiency is improved.

The invention discloses a nano nickel-based methanation catalyst which comprises the following components in percentage by weight: 20-35 % of NiO, 55-79 % of a carrier, and 0.1-10 % of a structure additive. The nano nickel-based methanation catalyst disclosed by the invention has the advantages that the catalyst is applicable to a slurry bed methanation process, high in catalytic activity, and good in stability.

The invention discloses a laser preprocessing device and processing method used for an optical element. The laser preprocessing device comprises a laser light source used for emitting laser as well as a light-splitting chopping plate, a reflecting mirror, a light beam shaping system and an electric translation stage used for placing a to-be-processed optical element are sequentially arranged in the laser transmission direction, wherein laser emitted by the laser light source passes through the light-splitting chopping plate and then is transmitted to the light beam shaping system through the reflecting mirror; the light beam shaping system is used for performing light beam shaping on laser; laser spots which are in Gaussian distribution are shaped into square spots which are uniformly distributed flatly; and finally, the laser is irradiated to the surface of the optical element for performing laser preprocessing on the optical element. According to the laser preprocessing device disclosed by the invention, irradiation energy density of the whole preprocessing process is uniform through the uniform square laser pots which are flatly focused, and dimensions of the spots are easily regulated through a multiplying power switching structure, so that the purpose of regulating energy density of laser which reaches the surface of the optical element is achieved.

A laser beam mixing apparatus to convert a laser beam bundle into a single laser beam having a uniform energy density. The laser beam mixing apparatus includes: a barrel to adjust a distance between a multi-core optical cable and an optical lens included therein, to convert a laser beam bundle into a single beam; and a stage to adjust the position and angle a single-core optical cable with respect to the optical lens, to align the core of the single-core optical cable with the center of the single beam.

The invention discloses an annular hollow offset-focus laser cladding device, and relates to the technical field of laser processing. The annular hollow offset-focus laser cladding device comprises a shell, a conical reflector, an annular off-axis parabolic focus lens, a nozzle and a powder spraying pipe, the top of the shell is provided with a light inlet, the conical reflector is arranged in the shell, and the conical reflector is arranged facing the light inlet; the annular off-axis parabolic focus lens and the conical reflector are oppositely and coaxially arranged; and the nozzle is installed below the conical reflector, the lower end of the nozzle is connected with the powder spraying pipe, the powder spraying pipe is coaxial with annular hollow offset-focus light formed after reflection of the annular off-axis parabolic focus lens, and a collimation protection gas sleeve is arranged on the periphery of the powder spraying pipe. The annular off-axis parabolic focus lens is used for horizontally shifting the focusing focus of the maternal parabola. According to the annular hollow offset-focus laser cladding device, the homogenization of the energy density of an annular light spot is realized, the coupling effect of a laser beam and powder is improved, the utilization rate of the metal powder is improved, and the cladding quality and appearance are improved.

The invention discloses a high-power laser frequency-doubling Q-switching device which comprises a linear-polarization photoelectric Q-switching laser generator, at least two beam-split frequency-doubling devices and a beam combiner group. Each beam-split frequency-doubling device comprises a beam-split lens, a one second wave plate or one fourth wave plate, a frequency-doubling crystal, an optical filter with high reflectivity to fundamental frequency light and high transmittance to frequency-doubled light, a beam expander lens group, a diaphragm and a frequency-doubled light fully-reflected lens, which are sequentially arranged along a beam split path. Each beam-split lens in each beam-split frequency-doubling device is arranged on the laser emitting path of the linear-polarization photoelectric Q-switching laser generator, each emitting path of each fully-reflected lens in each beam-split frequency-doubling device corresponds to the beam combiner group, and outputs multi-paths of lasers output by at least two beam-split frequency-doubling devices via the beam combiner group in a beam-combining manner, and requirements to the size and quality of the frequency-doubling crystals are effectively lowered.

The invention discloses an individual-soldier backpack type laser dazzle dispelling device. The device comprises a power supply, a casing, a strap, an optical system and a control system, wherein a laser outlet is formed in the front end of the casing, retaining rings, retaining ring seats, a handle and handle seats are arranged on an upper panel of the casing, and the optical system comprises a laser and lens assembly module, a completely reflecting mirror and a 2D galvanometer; the laser and lens assembly module comprises a bottom plate, a casing, a laser assembly, a varifocus lens assemblyand a direct current motor; the 2D galvanometer comprises an X axis galvanometer, an X axis motor, a Y axis galvanometer and a Y axis motor; the control system comprises a galvanometer driving controlboard, a laser temperature control board, an X axis driving circuit board, a Y axis driving circuit board and a laser control board. The invention also discloses a use method of the individual-soldier backpack type laser dazzle dispelling device. The individual-soldier backpack type laser dazzle dispelling device is convenient to carry, has long acting distance and a stable action, is good in dazzle effect, avoids effect loss of a weapon or permanent lesion to human eyes due to distance change and is high in practicability and convenient to popularize and use.

A workpiece is irradiated by a laser beam scanned in an oscillating track as the workpiece is advanced along a feed path in a hardening process. Sinusoidal variations in scan velocity are offset by decreasing the laser beam power level at phases in the scanning cycles corresponding to high and low scan displacement peaks, where the scan velocity is least. The beam power is increased near the scanning center line where the scan velocity is highest. The beam energy applied per unit of area is thus equalized over the scanning cycle. The workpiece temperature can be sampled at regular phases by a non-contact temperature sensor in the optical path, and used to control beam power versus phase in a subsequent scanning cycle. Alternatively or in addition, a sinusoidal beam power pattern can be stored and used to offset scan velocity variations as a function of phase.

The invention relates to a capacitor battery and a preparation method thereof, and belongs to the technical field of batteries. The capacitor battery comprises a positive electrode and a negative electrode which are composed of two types of electrode materials. The positive electrode comprises porous carbon electrode slurry and metal lithium salt electrode slurry which are sequentially coated on the surface of a current collector; and the negative electrode comprises disordered carbon electrode slurry and graphite slurry which are sequentially coated on the surface of the current collector. The capacitor battery is formed through simple slurry coating and assembling. The positive electrode and the negative electrode are respectively coated on the current collector through two materials, sothat the unification of the power density and the energy density is realized.

The invention provides an aviation wire harness end laser processing equipment, and relates to the field of aviation wire harness processing. The equipment comprises a bottom plate, a wire clamping mechanism, a rotating mechanism, a laser mechanism and an optical system arranged in the rotating mechanism, wherein the wire clamping mechanism, the rotating mechanism, and the laser mechanism are arranged on the bottom plate in sequence. Laser is adopted for machining the aviation wire harness end, an optical system is driven by a rotating mechanism to surround a machined aviation wire harness byone circle mainly based on a nanosecond short-pulse laser with the wavelength of 405 nm, and high-precision and high-efficiency aviation wire harness end machining serves as the target. And the processing of wire stripping, windowing, longitudinal cutting, regional evaporation ablation and the like of the aviation wire harness end is realized. According to the invention, the wire taking PTFE and PVC as insulating materials is taken as a processed material, the processing time is less than 5s, the fixed-length precision is not more than 0.2 mm, the processing length is 3-30mm, and the wire coreV is physically damaged, so that the equipment is compact in structure, reliable in processing quality, high in processing efficiency, high in processing precision, small in occupied space and convenient to move.

The invention discloses a laser ultrasonic detection device for large member nondestructive testing. The laser ultrasonic detection device comprises a power source, a shell, an optical system and a control system, a laser light outlet is formed in the front end of the shell, and the optical system comprises a laser device and lens set module, a total reflection mirror and a two-dimensional galvanometer; the laser device and lens set module comprises a baseboard, a housing, a laser device assembly, a varifocus lens set and a direct current motor; the laser device assembly comprises a laser device, a polarized beam mirror, an attenuation slice and a light reflex detector, and the two-dimensional galvanometer comprises an X-axis galvanometer, an X-axis motor, a Y-axis galvanometer and a Y-axis motor; the control system comprises a galvanometer driving control board, an X-axis driving circuit board, a Y-axis driving circuit board and a laser control board. The invention further discloses alaser ultrasonic detection method applicable to large member nondestructive testing. The laser ultrasonic detection device is novel and reasonable in design, convenient to carry, easy to maintain andconstant in energy, a large area can be detected in a single time, the efficiency is greatly improved, the practicability is high, and the laser ultrasonic detection device is convenient to apply andpopularize.

The invention discloses a portable laser weapon device against a small-sized unmanned aerial vehicle. The portable laser weapon device comprises a cylindrical laser transmitter and a foldable tripod used for supporting the laser transmitter, the laser transmitter comprises a shell, a power source, an optical system and a control system, wherein the power source, the optical system and the controlsystem are arranged in the shell, and a laser light outlet is formed in the front end of the shell; the optical system comprises a laser device, a lens set module, a holophote and a two-dimensional galvanometer; the laser device and the lens set module comprise a base board, a housing, a laser device assembly, a variable focus lens set and a direct current motor; the two-dimensional galvanometer comprises an X axis galvanometer body, an X axis motor, a Y axis galvanometer body and a Y axis motor; the control system comprises a galvanometer driving control plate, a laser device temperature control board, an X axis driving circuit board, a Y axis driving circuit board and a laser control board. The invention further discloses a using method of the portable laser weapon device against the small-sized unmanned aerial vehicle. The acting distance is long and stable, the fighting efficiency is high, the portable laser weapon device can be well applied to being against the small-sized unmanned aerial vehicle, and the practicability is high.

The invention relates to the technical field of photovoltaics, and discloses laser scribing equipment, a scribing method of a thin film photovoltaic chip and a power generation building board. The light spot of the target light beam output by the laser scribing equipment is a rectangular light spot, and the light intensity distribution of the light spot of the target light beam in the length and width directions is flat-topped distribution, namely, the target light beam is a two-dimensional flat-topped light beam. Compared with a Gaussian beam used in the prior art, the light spot of the target beam has the characteristic of uniform light intensity distribution, so that the light transmission of the lineation generated by using the target beam for scribing is uniform in the width direction, and the problems of high light spot center energy density, large ablation amount, low edge energy density and low edge energy density in the prior art are solved. And the light transmission degree of the scribing edge is not uniform due to insufficient ablation. The thin film photovoltaic chip adopted by the power generation building board is manufactured through the laser scribing equipment or the scribing method, and good use experience can be provided for users.

The invention relates to a multi-pass light spot laser emitter. The emitter comprises a laser source and a lens, and is characterized in that the lens comprises a plurality of lens subareas, the mainoptical axes of a plurality of lens subareas coincide and have different focal lengths, and the laser source is arranged on the main optical axis, under irradiation of the laser source, when light passes through different lens zones, divergence angles of the light are different. Through optical shaping system partition or multi-configuration optical system synthesis of the laser transmitting end,multi-configuration output of the laser transmitting system is achieved, the beneficial effect that the sizes of laser multi-pass light spots of a single transmitting unit are similar is achieved, that is, the sizes of the light spots with different detection distances are similar, and therefore model selection and layout of detection devices are greatly simplified.

The invention discloses a melamine foam uniform foaming device and belongs to the field of microwave foaming. The foaming device includes an oven body and multiple sets of microwave devices, wherein the front and rear side walls of the oven body are separately provided with a feeding door and a discharging door. Each set of microwave device includes a microwave source and a wave conduit, wherein the microwave source is arranged at one end of the wave conduit, the wave conduit is divided into a first branch pipe and a second branch pipe by a power splitter, the first branch pipe is arranged onthe top wall of the oven body, the second branch pipe is arranged outside the bottom wall of the oven body, top microwave feeding mouths are arranged on the connection surface between the first branchpipe and the oven body, bottom microwave feeding mouths are arranged on the connection surface between the second branch pipe and the oven body, and the top microwave feeding mouths and the bottom microwave feeding mouths are staggered in the length and width directions of the oven body. The melamine foam uniform foaming device has the advantages of good matching between the microwave feeding mouths, low microwave reflection rate, uniform energy density, good coupling with materials, high heating efficiency, small microwave leakage, safe use and the like.

The invention discloses an efficient coupling output method of high-peak power laser for cleaning. In order to achieve the object, the laser adopts an MOPA structure (i.e., the laser generated by an oscillator is amplified by an amplifier and then output), and an oscillator resonant cavity of the laser adopts a dynamic asymmetric stable cavity, so that a better laser output mode can be guaranteed,higher power can be achieved, the offset sensitivity of a lens is low, the effective area of a crystal rod in the amplifier is filled with light spots, the extraction efficiency of the amplifier is improved, and the LD damage caused by overlarge laser light spots can be avoided.

The invention relates to a shank whitening protective gear, comprising a leg mechanism and a foot mechanism. The leg mechanism and the foot mechanism are detachably connected by a zipper. The leg mechanism comprises a massage layer, a circuit layer and a light wave layer in sequence from outside to inside. The light wave layer is internally uniformly provided with a plurality of modulator tubes. Acontroller is arranged in the circuit layer. The modulator tubes are connected to the controller through a flexible circuit. A temperature sensor, a superheater, a temperature regulator, a vibrationregulator and an alarm are arranged in the circuit layer. The temperature sensor, the superheater, the temperature regulator, the vibration regulator and the alarm are controlled by the controller. Aplurality of vibrators are uniformly arranged in the massage layer. The vibrator is connected to the controller. The internal of the foot mechanism is provided with an instep paster on an instep position. The internal of the foot mechanism is provided with a sole paster on a sole of a foot. The instep paster and the sole paster are attached to the inner surface of the foot mechanism. The protective gear has advantages of massaging,promoting absorption, lighting and enhancing whitening effect, and solves whitening and skin problem of legs and foots.

The invention discloses a laser ultrasonic detection device applicable to large component nondestructive detection. The device comprises a power supply, a shell, an optical system and a control system, a laser outlet is formed in the front end of the shell, a handle and a handle seat are arranged on the upper surface plate of the shell, the optical system comprises a laser and lens assembly module, a total reflection mirror and a two-dimensional vibrating mirror, the laser and lens assembly module comprises a bottom plate, a shell, a laser component, a variable-focal lens system and a direct-current motor, the laser component comprises a laser, a polarization beam mirror, an attenuator and a light reflection detector, the two-dimensional vibrating mirror comprises an X-axis vibrating mirror, an X-axis motor, a Y-axis vibrating mirror and a Y-axis motor, and the control system comprises a vibrating mirror driving control board, a laser temperature control board, an X-axis driving circuit board, a Y-axis driving circuit board and a laser control board. The invention further discloses a laser ultrasonic detection method applicable to large component nondestructive detection. The device is convenient to carry and constant in energy and can detect larger areas once, and efficiency is effectively improved.