66results about How to "Reduce cooling pressure" patented technology

The invention provides a desktop supercomputing hardware platform based on DSP and FPGA multi-co-processing card. The hardware platform is composed of several co-processing cards mounted on the computer chassis. The co-processing cards contain multi-DSP processors and multi-FPGA chips. The co-processing cards are expanded through the PCIE bus slot of the computer motherboard to construct a desktopsupercomputer hardware platform with high availability, low power consumption and small volume. A CPU and DSP-FPGA collaborative computing acceleration architecture is adopted in the invention, the number of DSP and FPGA chips on the co-processing card can be customized according to the task requirements, so that a single card can provide at least 1 trillion times per second of computing performance. The chassis supports the simultaneous expansion of up to 8 co-processing cards, beyond which the co-processing cards can be further expanded through the FMC daughter board, and the computing power provided by the whole chassis can reach several ten trillion times per second. In addition, the standard PCIE interface and FMC interface are used in the co-processing card, the high-openness DSP and FPGA are used in the computational architecture, and the general-purpose CPU is also used. Users can develop their own application programs according to the task requirements.

The invention relates to the technical field of pulse solid-state power amplifiers, and provides a pulse solid-state power amplifier and a design method specific to the problems in the prior art. A microwave power transistor grid feedback network and a drain feedback network are improved, so that the contradiction between pulse response time and power supply efficiency in an existing pulse power amplification technology is eliminated, and a nanosecond pulse rising edge is realized under relatively high efficiency. The drain feedback network is an n-level pi-type network; an nth-level pi-type network comprises an nth capacitor and an nth inductor; a grid voltage temperature compensation circuit is connected with one input end of an input impedance matching network through the grid feedback network; a radio-frequency signal is input into the other input end of the input impedance matching network; an output end of the input impedance matching network is connected with a microwave power transistor grid; the microwave power transistor grid is connected with one input end of an output impedance matching network; and a microwave power transistor is biased at a C-type static working point after the radio-frequency signal passes through the input impedance matching network.

The invention relates to the technical field of LED lamps, in particular to an automobile LED headlamp. The automobile LED headlamp comprises a lamp shell and a lampshade. A high-beam lamp unit (1), a low-beam lamp unit (2) and a steering lamp unit (3) are arranged between the lamp shell and the lampshade; and the low-beam lamp unit and the high-beam lamp unit are subjected to heat dissipation through a heat dissipation tube and a three-layer sticking structure. The automobile LED headlamp is simple in structure, better in heat dissipation effect and convenient to machine.

The invention relates to a comprehensive treatment device for hydrogen manufacturing equipment through water electrolysis and belongs to the technical field of hydrogen or oxygen electrolysed water. A gas inlet is formed in the bottom of a tank body; the outlet of a water replenishing overflow pipe extends to the bottom of a gas-liquid separator; a replenishing water inlet communicated with outside is formed in the lower part of the tank body; a backflow component is arranged in the middle of the tank body; a drop capturing net is arranged at the upper part of the tank body. The comprehensive treatment device for the hydrogen manufacturing equipment through water electrolysis is integrated and replenished on the basis of the prior art, multiple steps in the hydrogen manufacturing process through water electrolysis are integrated, and the comprehensive treatment device, which can be used for cleaning, and cooling gas and replenishing water to a system during the hydrogen manufacturing process through water electrolysis, is provided, so that integration of multiple functions is realized, the total occupied area of the hydrogen manufacturing equipment through water electrolysis is reduced, the cost is reduced, and the whole utilization ratio of the device is increased.

The invention relates to integrated laser sources, in particular to an optical fiber light cone coupling based high-power high-brightness laser source which solves the problem of interaction between output light spot area and optical fiber bundle output power of an existing integrated laser source. The optical fiber light cone coupling based high-power high-brightness laser source comprises an optical fiber light cone which is made by fusion drawing of a plurality of optical fibers, the large end of the optical fiber light cone is provided with scattered pigtail fibers, and each optical fiber of the scattered pigtail fibers is connected with a laser which is provided with a collimating lens combination through a connector. The optical fiber light cone coupling based high-power high-brightness laser source is small in size, convenient, flexible, simple to mount and debug, high in output light power density, small in output light spot area and convenient for coupling with a subsequent optical system, and is widely applicable to the fields of laser illumination, laser processing, display projection systems taking laser as light sources, and the like.

A sacrificial offering incinerator provided with a smoke cleaning system comprises a crushing bin, an incinerator body, a quenching tower, a spraying tower, a cloth bag dust remover and a chimney which are sequentially connected through pipelines, wherein the incinerator body comprises a main combustion chamber, a re-combustion chamber and a board baffle; the board baffle is arranged between the main combustion chamber and the re-combustion chamber; a combustor and an air inlet are arranged on the inner wall of the main combustion chamber; sacrificial offerings are crushed through the crushingbin and then are fed into the incinerator body; air is supplied through the air inlet, and fuel is injected through the combustor; the sacrificial offerings are fully combusted in the main combustionchamber; smoke enters the re-combustion chamber for further combusting and is completely decomposed; the combusted smoke is cooled through the quenching tower and then enters the spraying tower for depickling and washing; the smoke is subjected to dust removing by the cloth bag dust remover; and the cleaned gas is exhausted into atmosphere through the chimney. The sacrificial offering incineratoris capable of performing multi-stage cleaning treatment, including dust removing, smell removing, and harmful substance removing; and the sacrificial offering incinerator has the characteristics of being high in combustion efficiency, and good in cleaning effect.

The invention provides an efficient wave length light-splitting type solar energy comprehensive utilization system. The efficient wave length light-splitting type solar energy comprehensive utilization system is characterized by comprising wave length light-splitting devices, a small included angle light-condensation device and a combined receiving device, wherein the small included angle light-condensation device is arranged the front stage of the wave length light-splitting devices in a light path, the combined receiving device is arranged at the back stage of the wave length light-splitting devices and composed of two or more kinds of receivers, the convergence included angle of light rays entering each wave length light-splitting device from the small included angle light-condensation device is smaller than or equal to 90 degrees, and the convergence included angle is further optimized to be smaller to or equal to 60 degrees. By utilizing the characteristic that the different receivers respond to different solar spectrums, the efficient wave length light-splitting type solar energy comprehensive utilization system efficiently utilizes sunlight, carries out photovoltaic power generation by utilizing the fact that certain varieties of photovoltaic cells can efficiently respond to radiation of partial frequency bands of sunlight, and meanwhile utilizes the radiation of rest frequency bands of sunlight to carry out optothermal power generation, thereby achieving economical, efficient and comprehensive utilization of the solar energy in the full-band range. Besides, temperature rise of the photovoltaic cells caused by radiation in a non-response or low-efficiency response range can be avoided, and economical, efficient and comprehensive utilization in the entire solar radiation range is guaranteed.

The invention discloses a premixed feed for improving egg yield of laying hens in summer and a using method thereof. The premixed feed consists of the following components in parts by weight: 8-14 parts of multivitamins, 15-25 parts of composite trace elements, 90-130 parts of monocalcium phosphate, 250-300 parts of stone powder, 40-60 parts of edible salt, 12-20 parts of choline, 50-100 parts ofanti-stress functional packs, 20-25 parts of sodium sulfate, 25-35 parts of methionine, 20-30 parts of 70% lysine, 3-6 parts of threonine, 5-8 parts of tryptophan, 10-20 parts of an intestinal healthregulator, 8-15 parts of a complex enzyme preparation, and 250-350 parts of kelp meal. The premixed feed disclosed by the invention not only can improve the anti-stress capability of bodies of layinghens and increase the nutrient intake, but also can reduce heat increment and increase the egg yield of laying hens in summer, and simultaneously can also effectively improve the egg quality, therebyhaving good value of actual application.

The invention provides a liquid crystal display, a display module thereof and a color light filtering device thereof, wherein the color light filtering device comprises a base plate, light filters and prism films; the light filters are attached onto the incident side of the base plate; the prism films are attached onto the light filters. Compared with the prior art, the liquid crystal display, the display module thereof and the color light filtering device thereof provided by the invention have the advantages that through the arrangement of two layers of prism films with different reflectivity rates at the incident side of the red light filter and the green light filter in the light filters and through the obtaining of the optimum prism saw tooth angle and the prism refractive index ratio by calculation, light in the blue and green wavelength bands in a light source can be reused; the utilization rate of a TFT (thin film transistor) display screen on the light is greatly improved; the energy saving goal is achieved. In addition, through improving the light utilization efficiency, the part of light adsorbed by the display module and converted into heat is reduced; the heat radiation pressure of the liquid crystal display is indirectly reduced.

The invention relates to a hybrid high-voltage DC breaker and a power unit thereof. The hybrid high-voltage DC breaker is composed of a flow through branch and a transfer branch, the flow through branch comprises a mechanical switch and a power unit of the flow through branch, the transfer branch comprises improved H-bridge structures and a power unit of the transfer branch, the improved H-bridge structures comprise three parallel branches, the first branch comprises a capacitor, each of the second and third branches comprises two full-control type power devices in reverse serial connection, and the structure of the hybrid high-voltage DC breaker is the improved H-bridge structure. In the process that a fault current is disconnected, the power unit of the hybrid high-voltage DC breaker avoid impact of fault current on anti-paralleled diodes of the full-control type power devices, loss of the power unit is reduced, and the service life of the hybrid high-voltage DC breaker can be improved effectively.

The invention belongs to the technical field of automobile accessories, in particular to an automotive graphene heat dissipation device and electrical equipment. The automotive graphene heat dissipation device comprises a main heat sink plate and a plurality of heat conduction columns, each heat conduction column is fixedly installed on the main heat dissipation plate; one side with each heat conduction column, of the main heat dissipation plate is sprayed with a first graphene coating; the side wall of the main heat dissipation plate is sprayed with a second graphene coating, the side wall ofeach heat conduction column is sprayed with a third graphene coating, and the end face of each heat conduction column facing away from the main heat dissipation plate is sprayed with a fourth graphene coating. Due to the extremely high thermal conductivity and thermal radiation coefficient of graphene, the graphene coating can efficiently absorb the heat transferred from the heating element to the main heat sink and the heat conduction columns, and dissipate the heat to the external environment. As such, by spraying that graphene coating on the main heat dissipation plate and each heat conduction column, the heat dissipation surface area of the automotive graphene heat dissipation device is enlarged, the heat dissipation performance is strengthened, and the overall corrosion resistance, durability and environmental protection of the automotive graphene heat dissipation device are improved.

The invention provides a flat panel detector communication system and method based on optical fiber interconnection. The system comprises a flat panel detector that is used for collecting images and sending image information based on a first optical fiber communication sub-module, an optical fiber for transmitting the information, and an upper computer that is used for receiving the information based on a second optical fiber communication sub-module, implementing information interaction based on an information interaction module and an upper computer communication module, and identifying anddisplaying the images based on an upper computer main function module. The method includes the following steps: collecting the image information, packing the image information into a data packet, andthen outputting the data packet through the optical fiber; and receiving the data packet through the optical fiber, unpacking the data packet, and then displaying the unpacked image information afteridentification. According to an optical fiber transmission medium adopted by the invention, the transmission bandwidth and reliability can be effectively improved, and the electromagnetic interferenceto other equipment can also be reduced; different rates can be flexibly adopted, and the design difficulty and cost of peripheral hardware equipment can be reduced; and various function sub-modules can be rearranged according to different application scenes to adapt to the harsh conditions in some application occasions.

The invention relates to an LED lamp bulb with a novel structure. A main body is composed of a lamp holder and a glass bulb shell, wherein a micro gas outlet and an electric contact are arranged on the lamp holder; an electrifying guide wire and an LED power supply drive assembly are arranged in the lamp holder; and a glass stem tube, an electric light-emitting assembly and a gas exhaust tube are arranged in the glass bulb shell. The glass stem tube is in the shape of a long cylinder; a stem head with a gas charge and discharge hole is arranged on the cylinder bottom; the gas exhaust tube is arranged on the center of a cylindrical cavity; and a ring cavity around the gas exhaust tube forms an electric light-emitting assembly mounting cavity which communicates with outside air. When the electric light-emitting assembly works, part of generated heat and part of generated liquid are remained in an environment which communicates with outside natural air to immediately emit and evaporate, so that the radiating pressure of an inner cavity of the bulb shell is reduced, corrosion influences, on an LED light-emitting element, of the remained liquid are avoided, the working service life and the illumination effect of the LED lamp bulb can be ensured; and moreover, the LED lamp bulb has the advantages of a simple and reasonable structure, reliable work, a long service life, low production cost and low daily use cost, and has very high practicability.

The application provides a light emitting device. The device includes an optical fiber interface, a detection unit, an electric switch unit and a transmission unit, wherein the detection unit is connected with the electric switch unit and is used for detecting the optical fiber plugging state of the optical fiber interface, when detecting that the optical fiber interface is inserted into an optical fiber, a closed signal is sent to the electric switch unit, and when detecting that the optical fiber is pulled out of the optical fiber interface, a disconnection signal is sent to the electric switch unit; the electric switch unit is connected between the transmission unit and a power supply circuit, is used for performing closing when receiving the closed signal sent by the detection unit toensure that the power supply circuit supplies power to the transmission unit, and is used for performing disconnection when receiving the disconnection signal sent by the detection unit to block the power supply of the power supply circuit to the transmission unit; and the transmission unit is connected with the optical fiber interface and is used for converting an electrical signal into an optical signal and emitting the optical signal on the optical fiber interface.

The invention discloses a method for dynamically adjusting voltage. The method comprises the following steps of electrifying a CPLD (Complex Programmable Logic Device) in response to startup, and controlling a power supply chip to electrify an exchange chip through the CPLD; detecting an AVS value output by the switching chip through the CPLD, and filtering out an invalid AVS value; converting thefiltered AVS value into a register value meeting the standard requirement of a PMBUS, transmitting the register value to a register for controlling an output voltage value in the power supply chip through the PMBUS, and acquiring the output voltage of the power supply chip to the switching chip by the register according to the register value; and the reset signal output to the switching chip being configured to be at a high level to execute voltage outputted to the switching chip after the CPLD controls delay for a preset time. The invention further discloses a device, equipment and a medium.The method is advantaged in that an output voltage of the power supply chip can be controlled by dynamically adjusting the voltage of the core through the CPLD, so power consumption of the switchingchip is reduced.

The invention relates to a truss type double-wall heat insulation device for an engine combustion chamber. The truss type double-wall heat insulation device comprises a gas film pore plate layer, an impact pore plate layer and a sandwich truss shaped like the Chinese character'mi' which are used for forming the inner wall of a combustion chamber barrel, the sandwich truss shaped like the Chinese character'mi' is composed of four truss rods, the midpoints of the four truss rods are mutually crossed to form a central cross point, two ends of the four truss rods are connected with the impact pore plate and the air film pore layer, air film holes matched with the sandwich truss shaped like the Chinese character'mi' are formed in the air film hole plate, and impact holes matched with the sandwich truss shaped like the Chinese character'mi' are formed in the impact hole plate. The invention further provides a method for forming the cold air film through the device, the air film holes and the impact holes are matched between an air film hole plate layer and an impact hole plate layer to form four strands of longitudinal cooling vortex systems extending in the airflow flowing direction, and an air film cold air heat insulation layer is formed on the outer wall face of the air film hole plate. The structure is simple, the strength is high, the operation temperature of an engine is increased, the service life of the engine is prolonged, and meanwhile the strength is improved.

The invention belongs to the technical field of quick manufacturing equipment and particularly relates to a mask-based zonal preheating apparatus and a zonal preheating method thereof. A global heating light source and a local preheating light source are used with a base plate of a forming cylinder to heat bottom powder; a mask is arranged between the local preheating light source and the global heating light source; a local preheating zone is coated with powder to be sintered; all the local preheating light source, the mask and the global heating light source are connected with a temperaturecontroller; a temperature control probe of a temperature monitor and a thermal imager are arranged in a working chamber to detection powder temperature. The method of decreasing total working temperature of a forming cylinder and decreasing cooling pressure of the apparatus helps increase working stability and continuous operating time of zonal laser sintering equipment and allows quick sinteringfor high-melting-point powder and multiple recycling for the powder.

The invention relates to a juice extractor. A stirring blade structure is installed at the bottom of an upper barrel. A connection shaft sleeve hinged to the stirring blade structure is installed on a lower seat. An air guide barrel is arranged at the bottom of the lower seat in the height extension direction. A heat dissipation cavity is formed in the top of the lower seat. A second air inlet is formed in the bottom of the heat dissipation cavity. A rotary shaft of a motor penetrates through the second air inlet and extends into the heat dissipation cavity. The connection shaft sleeve is installed on the portion, inside the heat dissipation cavity, of the rotary shaft of the motor. The bottom of the connection shaft sleeve and the second air inlet form an air inlet gap. A plurality of blades are connected to the outer wall of the connection shaft sleeve in the peripheral direction. A second air outlet communicated with the second air inlet is formed in the side wall of the heat dissipation cavity. A middle sleeve is arranged between the upper barrel and the lower seat in a sleeved mode. A water outlet nozzle structure is detachably installed on the middle sleeve. The water outlet nozzle comprises a water outlet pipe, a plunger, a pull ring and a seal ring. The stirring blade structure comprises stirring blades and a coupler. A buffering silica gel sleeve is arranged between a connector and the connection shaft sleeve in a sleeved mode. The juice extractor is simple and reasonable in structure, convenient to disassemble and assemble and good in stirring effect.

The invention discloses a switching frequency minimization harmonic suppression pulse width modulation method suitable for a two-level inverter, The main technical features include: sampling the two-level PWM waveform in one fundamental period at equal intervals and representing it as a binary variable sequence, and using the first-order difference matrix to represent the switching frequency as aquadratic function of the binary variable sequence; The PWM waveform is expanded by Fourier series, and the linear constraint conditions of fundamental wave and harmonic wave with respect to binary variable sequence are established according to numerical integration formula. A binary quadratic programming model or 0-1 quadratic programming model is constructed by taking the switching frequency asan optimization target function. The quadratic programming model is solved and the discrete two-level PWM waveform is obtained. Compared with the specific harmonic elimination method commonly used atpresent, the method disclosed by the invention obviously reduces the number of switch angles required when the same number of harmonics are eliminated, which can effectively reduce the switching lossof the inverter and improve the energy conversion efficiency.

The invention provides an inductor for assisting heat dissipation of electronic components and a novel electrical box, including an inductor casing, a refrigerator is embedded in the bottom of the inductor casing, and the outer wall on the same side of the inductor casing includes a first side wall and second side wall, the first side wall and the second side wall are staggered with each other and have a drop, and the end faces corresponding to the first side wall and the second side wall are provided with a space for mounting electronic The first slot of the component. Based on the technical solution of the present invention, the electronic components and the inductors are integrated, which not only reduces the volume of the electrical box, but also makes the heat of the components in the electrical box concentrate on the inductor housing. The liquid medium transfers the heat concentrated on the inductor housing, so that all components in the electrical box can be effectively dissipated.

The invention relates to the technical field of chemical production, in particular to a method and a system for preparing polymer polyol. The method for preparing the polymer polyol comprises the following steps: uniformly mixing the raw materials except the basic polyether, and then mixing with the basic polyether to carry out polymerization reaction. The raw materials except the basic polyetherare uniformly mixed and then mixed with the basic polyether, so that on one hand, the material cooling time can be shortened, the production period is shortened, the production efficiency is improved,and on the other hand, the batching frequency and the labor intensity of workers can be reduced; and the self-polymerization reaction of the raw materials except the basic polyether can be prevented,so that impurities in the polymer polyol can be reduced, the quality of the polymer polyol can be improved, a pipeline can be prevented from being blocked by a product produced by a self-polymerization reaction, and meanwhile, the situation that a part of raw materials volatilize due to the fact that the temperature of the basic polyether is higher than the boiling point of the raw materials except the basic polyether can be avoided.

The invention relates to an injection molding machine and aims to provide a residual heat recycling and reusing system for the injection molding machine. The residual heat recycling and reusing systemis characterized by comprising a heat collection hood, a heat collection pipe, an air conveying pipe and a conveying air fan, wherein the heat collection hood is fixedly connected on one side in thelong edge direction of an operating platform, the heat collection pipe communicates with the heat collection hood, the side, relative to the heat collection hood, of the operating platform is providedwith an air blowing pipe in a penetrated manner, the air blowing pipe is provided with an air blowing hole facing the injection molding machine, an air inlet of the conveying air fan communicates with the heat collection pipe, the air conveying pipe communicates with an air outlet of the conveying air fan and communicates with the air blowing pipe, and the heat collection pipe is provided with aheat dissipation barrel. The residual heat recycling and reusing system for the injection molding machine has the advantage of recycling and reusing residual heat generated in the working process of the injection molding machine.

The invention relates to a totally-enclosed water cooling structure applied to a permanent magnet traction motor, and solves the heat dissipation problem of the motor when the boundary dimension is strictly limited and the torque output is large. According to the main scheme, a stator iron core of a full-lamination welding structure is adopted, and is composed of stator pressing rings at the two ends, a stator punching sheet and a pulling plate; cooling pipeline mounting holes are formed in four corners of the stator pressing rings and the stator punching sheet; and cooling pipelines are assembled in the mounting holes in the four corners of the corresponding stator iron core, are connected in series and welded, are arranged in a motor through specially designed gap bridge pipelines, and realize internal and external alternate transition connection of the motor so as to achieve the effect of cooling the stator iron core of the motor and the interior of the motor. According to the cooling structure, a traditional motor frame type engine base structure is canceled, the proportion and the arrangement position of a cooling water path are optimized, water paths are arranged at four corners without additionally increasing the boundary dimension of the motor, and under the condition that the boundary dimension of the motor is strictly limited, the armature diameter is effectively increased, the motor loss is reduced and the output torque is improved.

The invention relates to a novel thermal forming method of a high-strength steel plate stamping part, belonging to the field of thermal stamping forming. Based on a theory that a boron alloy plate which temporarily contacts with air below 600 DEG C can not generate oxide scales, the invention improves an original thermal stamping forming technology. The novel thermal forming method comprises the following steps: heating the plate to a temperature over a recrystallization temperature; transferring the plate to a cooling cavity chamber with a gas protection atmosphere under an air-isolation condition; cooling the plate to 600 DEG C at a rate faster than 27 DEG C / S; and then, rapidly transferring the plate to a thermal stamping forming die to rapidly form and cool to obtain a high-strength part without oxide scales on the surface. The invention solves the problem that the oxide scales are easy to generate on the surface of the plate at a high temperature condition in the thermal stampingforming process, improves the surface quality and the spraying performance of the part, lightens the cooling pressure of the die, delays the thermal fatigue failure of the die and prolongs the service life of the die.

The invention provides a novel special mammary gland CT device based on a pulse X-ray source and a control method thereof, and belongs to the field of CT scanning technology. The CT device comprises a housing, a rotary disc is movably disposed in the housing, the rotary disc is provided with an X-ray tube and a flat panel detector, the X-ray tube is a grid control X-ray tube, the grid control X-ray tube is connected with a high-voltage generator used for controlling the grid control X-ray tube to carry pulse exposure. The housing is fixedly provided with an X ray permeable scan cup, the scan cup is disposed over center of rotation of the rotary disc, and the X-ray tube and the flat panel detector are respective arranged at two sides of the scan cup. The novel special mammary gland CT device based on a pulse X-ray source is short in exposure time, motion artifact can be effectively avoided, the duty ratio can be freely adjusted according to needs, the radiation dose can be reduced while the pressure of heat dissipation of the anode of an X-ray tube is reduced, and the service life of the X-ray tube can be prolonged.

The invention discloses a surface treatment system for recycling waste heat of a cooling tower by a high-temperature heat pump for an aluminum processing and oxidation production line. The system comprises a high-temperature heat pump, a water circulating pump a, a hot water tank, plate-type heat exchangers, a water circulating pump b, a cooling water tank, a cooling tower, a water circulating pump c, a refrigerating unit, a water circulating pump d and a cold water basin. A small amount of electricity is consumed by the high-temperature heat pump, the waste heat of the cooling tower is used as a heat source, the temperature of the heat source is about 30 DEG C, hot water at 75 to 95 DEG C is prepared by the high-temperature heat pump, and the heating coefficient can reach more than 5.6, i.e. 5.6-kilowatt heat can be obtained by consuming 1-kilowatt electricity. If fuel is burnt to generate power, the heat efficiency is 32%, i.e. the utilization rate of the fuel is 179% and is much higher than the heat efficiency of a fuel boiler. The waste heat of the cooling tower is recycled to prepare hot water by the high-temperature heat pump, and the fuel boiler is replaced, so that energy can be saved, the operating cost and the energy are reduced, and additionally, the discharge of CO2, SO2, NOx and the like is reduced.

The embodiment of the invention provides an alternating current impedance test method, a computer readable storage medium and electronic equipment, and the method comprises the steps: receiving a user instruction, and analyzing a frequency value in the user instruction; determining a size relationship between the analyzed frequency value and a preset threshold value; when the frequency value is smaller than a preset threshold value, the feedback electronic load is controlled to apply a sine test signal with the analyzed frequency value to the tested equipment; when the frequency value is greater than a preset threshold value, controlling a feedback electronic load to apply a basic test signal to the tested equipment, and controlling a disturbance load to apply a disturbance test signal of which the frequency is the analyzed frequency value to the tested equipment; thus, electric energy generated in the alternating current impedance test process is fed back to the power grid, and electric energy waste is avoided as much as possible; the heat dissipation pressure is reduced, and the size of the test equipment is reduced; the service life of the disturbance load is prolonged, and the damage risk of the disturbance load is reduced.

The invention discloses an optical fiber coupling device and laser coupling equipment. The optical fiber coupling device comprises a heat conduction shell, a bare optical fiber and an insertion core,wherein the bare optical fiber is arranged in the heat conduction shell in a penetrating mode and used for conducting energy transmission, and the input end of the heat conduction shell is flush withthe input end of the bare optical fiber; and the insertion core is located between the heat conduction shell and the bare optical fiber so as to connect the heat conduction shell and the bare opticalfiber, and the input end part of the insertion core is provided with a reflection plating layer. The input end of the heat conduction shell is flush with the input end of the bare optical fiber, the bare optical fiber can be cleaned in a non-contact mode, and cleaning airflow does not need to pass through the inner side wall of the heat conduction shell during cleaning, so that the bare optical fiber is cleaned conveniently, the service life of the bare optical fiber is ensured, and the cost is reduced at the same time; through the flush arrangement, the incident angle can be changed and is not limited by the wall surface of the heat conduction shell; and the reflection plating layer is arranged, so that the absorption of the insertion core to the light is reduced.