490results about How to "Short life" patented technology

The utility model belongs to the technical field of solar panels, and particularly relates to an umbrella type automatic folding solar panel which comprises a containing bin, a first electric push rod is arranged in the containing bin, a guide column is arranged at the end of the first electric push rod, and an umbrella cover is fixedly connected to the end of the guide column. A plurality of photovoltaic panels are fixedly installed on the top of the umbrella cover, the outer wall of the guide column is slidably connected with a ring sleeve, and the ring sleeve is connected with the umbrella cover through umbrella ribs. In severe weather, the second electric push rod is electrified and contracted to move the ring sleeve, the ring sleeve moves and the umbrella ribs are utilized to fold the umbrella cover, so that the photovoltaic panel is folded, after the photovoltaic panel is folded, the first electric push rod contracts to collect the photovoltaic panel into the containing bin for storage and protection, and the photovoltaic panel is prevented from being damaged in the severe weather. Rain, snow, wind, sand and hail can impact a solar panel, the solar panel is damaged, the service life of the solar panel is shortened, and the using effect is reduced.

The invention belongs to the field of cooperative control of a multi-agent system, and the method aims at a fully heterogeneous linear multi-agent system under a directed topological graph, takes event-triggered communication transmission as a background, and aims at realizing stable formation control on the premise of utilizing a fully distributed control structure. And the formation control problem of the fully heterogeneous multi-agent system based on the mixed event triggering mechanism is researched. According to the method, a mixed event trigger communication strategy is used, network transmission bandwidth occupation can be reduced, and data transmission energy consumption is saved; designing a local state observer and a distributed event trigger state observer to estimate the states of the followers and the leader according to the conditions that the states of the followers are unknown and communication links do not exist between the leader and part of the followers; the designed distributed formation control protocol does not depend on global information, can ensure that followers realize ideal time-varying output formation configuration in a dynamic environment, and can accurately track a motion trail formed by a plurality of leaders at the same time.

The invention relates to the field of gears. A residual stress intensity factor is introduced into a Walker model, the influence of residual stress on the crack propagation residual life is analyzed, then a crack closing coefficient is introduced to correct the Walker model, and the bending fatigue life of the gear is obtained. The roughness and the dynamic meshing force are added into the model, the dynamic abrasion loss of the gear is calculated according to the improved Archard model, and the contact fatigue life of the gear is obtained; and finally, combining the gear bending fatigue reliability distribution function with the contact fatigue reliability distribution function by adopting a Copula function, and analyzing a competitive failure relationship among different failure forms by utilizing the combined distribution function to obtain a competitive failure reliability model so as to analyze the service life of the gear. According to the technical scheme, the technical problem of comprehensively describing the reliability of the gear is solved, accurate prediction of the reliability of the gear is achieved, and research, development and design of the gear are facilitated.

The embodiment of the invention relates to the field of solar cells, provides a solar cell and a preparation method thereof, and at least can solve the problem that the performance of a fragmented cell is poor. The solar cell comprises fragmented cells, at least two fragmented cells are formed by segmenting the same whole solar cell along a first direction, and each fragmented cell comprises a first surface, a second surface and a third surface connected with the first surface and the second surface, the first surface is a partial area of the front surface of the whole solar cell, the second surface is a partial area of the back surface of the whole solar cell, and the third surface is a cross section of the fragmented cell after segmentation processing; the crystalline silicon layer is positioned on the third surface; the silicon oxide layer is positioned on the surface of the crystalline silicon layer; and the metal oxide layer is positioned on the silicon oxide layer.

The invention discloses a 2.5 D Chiplet structure physical field coupling characteristic analysis method. The method specifically comprises the following steps: step 1, adding a solid heat transfer physical field interface, a solid mechanical physical field interface and a thermal expansion physical field interface to a 2.5 D Chiplet structure; 2, boundary conditions are added to a solid heat transfer physical field interface, and the temperature distribution condition of the 2.5 D Chiplet structure is obtained; step 3, solving the deformation and stress distribution conditions of the 2.5 D Chiplet structure; 4, the solid heat transfer physical field interface and the solid mechanical physical field interface are coupled through the expansion physical field interface; and 5, carrying out grid division on the 2.5 D Chiplet structure to obtain the temperature, stress and deformation distribution conditions of the structure. The method can accurately predict the distribution of the temperature field and the force field on the packaging chip, and facilitates the thermal analysis of the packaging structure.

The invention relates to a cold compressor and a dilution refrigerator adopting the cold compressor, the cold compressor comprises a driving part, an air cylinder and a piston, and further comprises a precooling refrigerator, the precooling refrigerator is connected with the air cylinder, and the compressor is precooled through the precooling refrigerator. The cold compressor can be used on a dilution refrigerating machine or a space dilution refrigerating machine, and compared with the prior art, the refrigerating machine is adopted for cooling the compressor, so that the compressor becomes the cold compressor, and therefore it is ensured that helium-3 is compressed at the low temperature.

The invention discloses a flame-retardant semi-solid gel electrolyte and a preparation method thereof, and the flame-retardant semi-solid gel electrolyte comprises the following raw materials in parts by weight: 100-120 parts of PVDF resin, 25-30 parts of PPC resin, 5-10 parts of modified hollow ceramic fiber, 3-5 parts of modified nano aluminum hydroxide, 15-20 parts of an organic solvent, and 4-6 parts of a conductive agent. The modified hollow ceramic fiber is a Li0. 5La0. 5TiO3 hollow ceramic fiber subjected to surface grafting modification by 3-aminopropyltrimethoxysilane, the modified nano aluminum hydroxide is an antioxidant flame retardant grafted modified nano aluminum hydroxide, and the antioxidant flame retardant is a triazine derivative containing a hindered phenol structure and a DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) structure. According to the flame-retardant semi-solid gel electrolyte disclosed by the invention, the gel strength of the flame-retardant semi-solid gel electrolyte is improved, meanwhile, the ionic conductivity of the flame-retardant semi-solid gel electrolyte is improved, and the flame-retardant property and the thermal stability of the flame-retardant semi-solid gel electrolyte are improved by adding the modified nano aluminum hydroxide.

The invention discloses a data reinforcement method, device and equipment for a nonvolatile memory and a medium, and relates to the technical field of memorizers, the data reinforcement method comprises the following steps: monitoring whether the current environment temperature is lower than a first preset threshold value or not, and if the current environment temperature is lower than the first preset threshold value, starting the memory; if yes, obtaining an initial error correction code of each data block in the nonvolatile memory; performing correction code verification on each data block based on the initial error correction code so as to screen out a target data block of which the initial error correction code characterizes successful correction from each data block; and reading target data stored in the target data block, and rewriting the target data into the target data block to complete data reinforcement on the target data block. By means of the scheme, the accuracy of reading the data stored in the nonvolatile memory can be improved in the low-temperature environment.

A side outgoing line connector disclosed by the present invention comprises a plug shell, the top of the plug shell is provided with a plug upper cover, the plug shell is internally provided with a switching copper bar, the top end and the bottom end of the switching copper bar are respectively in threaded connection with a jack assembly and a wiring copper bar through bolts, the jack assembly is in butt joint with an equipment end, and the wiring copper bar is in threaded connection with the switching copper bar through bolts. The wiring copper bar is fixedly connected with a cable. Through the switching copper bar, the wiring copper bar and the plug shell capable of meeting the specific turning angle, switching of a circuit in the connector is achieved, and the situation that the service life of a cable is greatly shortened due to the fact that the cable connected with the connector has a small turning radius during wiring can be effectively avoided; the jack assembly is connected with the wiring copper bar through the switching copper bar, and the bending angle of the switching copper bar or the connection included angle between the switching copper bar and the wiring copper bar can be adjusted, so that the wire outgoing requirements in multiple directions can be realized, the operation is more flexible, and the space in the plug-in direction of the connector is more saved.

The invention discloses application of an OsLOX1 gene in regulation and control of drought resistance and seed vigor of rice, and relates to the technical field of plant genetic engineering. According to the invention, the drought stress tolerance of the mutation line with the OsLOX1 knocked out through CRISPR / Cas9 is lower than that of a wild type line, and along with the increase of the content of hydrogen peroxide (H2O2) and malondialdehyde (MDA) and the reduction of the expression quantity of antioxidant enzyme related genes. In addition, it is found that compared with a wild type, the service life of rice seeds is shortened by knocking out OsLOX1, meanwhile, the content of H2O2 and MDA is increased, and the activity of antioxidant enzyme superoxide dismutase (SOD) and catalase (CAT) is reduced; the method can be used for breeding storage-resistant and drought-resistant rice varieties; important gene resources are provided for cultivating drought-resistant rice varieties and prolonging the service life of seeds.

The invention relates to a coalescence reinforced cyclone separation device and method for removing oil drops from gas. The device comprises a cylindrical barrel, the interior of the barrel is divided into an inlet cylindrical section provided with a tangential inlet, the lower portion of the inlet cylindrical section is sequentially provided with a first-stage rotational flow section, a second-stage rotational flow section and a bottom oil storage section which are coaxially communicated with one another, and the upper portion of the inlet cylindrical section is provided with a top filtering section coaxially communicated with the inlet cylindrical section; coalescence assemblies are attached to the inner walls of the inlet cylindrical section, the first-stage rotational flow section and the second-stage rotational flow section, a bottom coalescence triangle is arranged in the center of the bottom face of the bottom oil storage section, and a top filtering assembly is coaxially arranged in the top filtering section; the cyclone separation and coalescence separation technologies are combined, centrifugal force and the adhesion effect of coalescence fibers are utilized, fine oil drops are captured and coalesced into large oil drops, the large oil drops finally flow into the bottom oil storage section, gas purification is achieved, and oily liquid drops small in size and wide in particle size range in gas are effectively separated. The device has the advantages of high separation precision, high efficiency, compact structure, convenience in maintenance and the like.

The invention relates to a hybrid power system, method, device and equipment based on battery internal resistance prediction and a medium. The system comprises an engine, a gearbox, a first driving motor, a first power battery, a first charging module, a PTO shaft and a CVT shaft. The first power battery is used for providing electric energy for the first driving motor; the engine and / or the first driving motor are / is used for transmitting power to the gearbox and the PTO shaft, and the gearbox is used for transmitting power to the CVT shaft; and the first charging module is used for controlling the first power battery to work in the interval with the lowest internal resistance based on the first target corresponding relation corresponding to the first power battery and the current first charge state. The tractor can be controlled to always work under the working condition that the battery internal resistance is the lowest, and the possibility that the battery life is shortened and the charging and discharging capacity is damaged is reduced.

The invention relates to the technical field of lightning protection circuit detection, in particular to a method and device for detecting the service life of a gas discharge tube, and the method comprises the steps: repeatedly calculating a plurality of performance loss characterization coefficients corresponding to each working condition time node of the gas discharge tube in a preset operation duration, and constructing a change curve of the fitting values of the performance loss characterization coefficients, determining a characteristic working condition time period according to the dispersion of the fitting value of the performance loss characterization coefficient of the plurality of working condition time nodes in each change curve section; and whether the performance of the gas discharge tube is abnormal or not is judged according to the change condition of the dispersion of the performance loss characterization coefficient fitting value in the characteristic working condition time period before and after the piezoresistor is switched on. Personalized sample data are established according to the environmental factor influence of the gas discharge tube and the change of the working condition of the circuit where the gas discharge tube is located, and scenarized operation state analysis is performed, so that the accuracy of performance life detection of the gas discharge tube is improved.

The utility model relates to the technical field of power equipment, in particular to a movable charging pile which comprises a base, an air pump and a charging pile body, a damping mechanism is arranged at the lower end of the base and connected with a sliding mechanism, the air pump is arranged at the upper end of the base and connected with a supporting mechanism, and the charging pile body is connected with the air pump. The charging pile comprises a base, a take-up mechanism is arranged at the upper end of the base, a charging pile body is arranged at the upper end of the base, a cooling mechanism is arranged on the side edge of the charging pile body, a rain shielding mechanism is arranged at the upper end of the charging pile body, rain shielding is conducted through the rain shielding mechanism in the using process, and the device is prevented from being corroded by rain in the long-term using process; and an arranged cooling mechanism can cool the charging pile body when the device is heated in the using process, and the situation that the service life of the battery is shortened due to the fact that the battery is kept in an overheat state for a long time is avoided.

The present invention relates to the technical field of vehicle air compressors, and in particular to an oil-free air compressor transmission structure and a vehicle. The oil-free air compressor transmission structure includes a motor housing, a motor assembly and a bearing assembly. The motor assembly is arranged inside the motor housing. The motor assembly includes an inner shaft, and the inner shaft is rotatably connected to the motor housing through the bearing assembly; it also includes a housing, a power assembly, and a large bearing. The housing is detachably connected to the motor housing. The power assembly includes a first half crank and a second half crank. The first half crank and the second half crank are mutually buckled and connected to form a crankshaft. The crankshaft is rotatably connected to the housing through the large bearing; it also includes a connecting piece. The first section and the inner shaft can be separated from each other, or can be detachably connected only through the connecting piece. In the present invention, the first section and the inner shaft can be detachably connected only through the connecting piece. The present invention solves the technical problem of how to remove the elastic coupling between the crankshaft and the inner shaft and connect them.

The invention belongs to the field of organic electroluminescence, and provides a metal iridium complex, a preparation method thereof and an organic electroluminescent device. The structural general formula of the metal iridium complex is shown in the specification. The metal iridium complex provided by the invention has the advantages of low evaporation temperature, high photo-electrochemical stability, high luminous efficiency, long device life and the like, the preparation method provided by the invention is simple in process, the prepared product is high in purity and suitable for industrial production, and the problem that the luminous efficiency of an existing luminous material is insufficient is solved.

The invention discloses a National VI automobile exhaust after-treatment system, belonging to the technical field of automobile exhaust treatment, comprising an exhaust pipe front section, an exhaust pipe rear section, a control system, and an exhaust gas temperature regulator, a DOC, a DPF, an SCR, an ASC ammonia slip catalyst and a pyrolyzer which are sequentially connected in series between the exhaust pipe front section and the exhaust pipe rear section; the control system is composed of a controller, a first temperature sensor installed at an SCR inlet end, a second temperature sensor installed at a DPF inlet end, a first pressure sensor installed at a DPF inlet end and a second pressure sensor installed at a DPF outlet end; the system can control the emission temperature and airspeed of all working conditions, implement high temperature protection for the catalyst of each device, and control the minimum filter layer of the DPF during continuous passive regeneration; the contact opportunity between the exhaust gas and the catalyst is increased, and the maximum efficiency maximization and the back pressure minimization can be achieved at the same time; the catalyst of the patent has a fast cold start, high conversion efficiency in each working condition, small exhaust resistance, stable performance, long service life and low cost.

The invention discloses material mixing equipment for hard alloy material processing, which comprises a stabilizing seat, a material mixing tank, a stirring structure, a powder feeding hole and a liquid feeding hole, and further comprises a lower powder butt joint structure, the stirring structure comprises a driving motor and an upper stirring rod, the lower powder butt joint structure comprises a limiting cylinder fixed at the bottom in the material mixing tank, and the limiting cylinder is fixed at the bottom in the material mixing tank; a lower stirring rod is movably mounted on the inner side of the limiting cylinder and is clamped with the upper stirring rod, stirring blades are arranged on the outer side of the lower stirring rod, and an outer sleeve ring is arranged on the outer side of the lower stirring rod and the outer side of the upper stirring rod; the lower flow penetrating structure comprises an annular table located below the stirring blades, the annular table is connected with the lower stirring rod and rotates along with the lower stirring rod, a plurality of sets of movable pressure applying frames are arranged at the upper end of the edge of the outer side of the annular table, and a pressure applying rod is arranged on the inner side of each movable pressure applying frame. And the uniformity of the mixing temperature is ensured.

The invention discloses a cold forging forming process and die for a triangular shaft of a clutch, and the cold forging forming process comprises the following steps: S1, blanking: straightening a wire rod material, and processing the wire rod material into a bar material longer than the triangular shaft; s2, annealing is conducted; s3, carrying out first surface treatment; s4, first extrusion is conducted, specifically, a floating die with a certain out-of-tolerance range is designed for the triangular shaft according to the shape of the triangular shaft, the bar subjected to first-time surface treatment is put into the floating die, pressure is applied from the two ends so that the bar can be upset to form a hexagon, the bar can extend out of three rectangular clamping positions in the radial direction of the hexagon, and a middle forging stock is formed; s5, carrying out non-oxidation annealing; and S6, carrying out secondary surface treatment. According to the cold forging forming process and the cold forging forming die for the clutch triangular shaft, the characteristic of near-net forming of materials can be utilized, a triangular shaft part which can be matched with a small amount of machining to have very high precision is formed, the material utilization rate can reach 53.4%, the machining time can be saved by at least 50%, and the production cost and the machining efficiency are remarkably improved.

The invention discloses a high-oxygen steel submerged nozzle as well as a preparation method and a use method thereof. A nozzle body comprises the following components: 31%-35% of C, 49%-54% of Al2O3 and 13%-16% of SiO2; the composite layer comprises the following components in percentage by weight: 26%-30% of MgO and 70%-74% of Al2O3; a coating is attached to the surface of the composite layer and comprises the following components: more than or equal to 99% of MgO; and the slag line part is made of a zirconium carbon material. The preparation method of the water gap comprises the steps of burdening, mixing, forming and firing. The obtained submersed nozzle product is preheated and cast-on for use, continuous casting of 1600-2000 tons of molten steel can be achieved for steel with the oxygen activity controlled to be 1.5 * 10 <-4 >-3.0 * 10 <-4 >, the inner surface of the refractory material is good, the situation that small pieces of the refractory material enter the molten steel after being eroded to form inclusions is avoided, meanwhile, the situation that after the submersed nozzle is eroded, the structural size in the nozzle changes can be prevented, and the service life of the submersed nozzle is prolonged. And therefore, the quality of the continuous casting billet is ensured.

The invention discloses a thermostatic equipment control system based on an electronic expansion valve and electronic equipment, and aims to solve the problems that in the prior art, an inverter compressor is high in cost, and other schemes cannot accurately control heating power. The constant temperature equipment comprises a circulation pipeline formed by sequentially connecting an evaporator, a fixed frequency compressor and a condenser in series and two electronic expansion valves, one electronic expansion valve serves as a refrigeration electronic expansion valve and is located on a pipeline between an outlet of the condenser and an inlet of the evaporator, and the other electronic expansion valve serves as a hot gas bypass electronic expansion valve and is located on a pipeline between an outlet of the condenser and an inlet of the evaporator. The condenser is integrally connected with the refrigeration electronic expansion valve in parallel; the control system comprises a first PID (Proportion Integration Differentiation) controller, a second PID controller and a third PID controller; the opening degree of the hot gas bypass electronic expansion valve and the opening degree of the refrigeration electronic expansion valve are determined based on the PIDValue 1, the PIDValue 2 and the PIDValue 3 output by the control system, and control over the constant temperature system is achieved.

The invention belongs to the technical field of synthesis of organic chemical products through olefin carbonylation, and particularly relates to a catalyst system for ethylene carbonylation reaction. The catalyst system includes a palladium salt, one or more phosphine ligands, and one or more phosphorus (P)-containing compounds as stabilizers; the molar ratio of the palladium to the phosphine ligand to the stabilizer is 1: (1-6): (60-1000). According to the method, the phosphorus (P)-containing compound serving as the stabilizer is introduced to replace the sulfonic acid, direct use and supplement of the sulfonic acid are avoided, the catalytic activity and stability of a catalyst system can be improved, the equipment and process requirements can be reduced, and the method has a good application prospect.

The invention discloses a laser gas telemetering imaging system based on micro galvanometer scanning and a detection method, the system comprises: a laser transmit-receive optical unit, detection laser emitted by a semiconductor laser and aiming laser emitted by an aiming laser are combined by a beam combiner, and are collimated to an MEMS micro galvanometer through a collimation system; the MEMS micro galvanometer deflects by a corresponding angle to reflect the laser beam to a target detection area; the photoelectric detector array is used for receiving a light return signal of the detection laser; the signal processing and control unit is used for calculating the concentration information of the target gas in the target detection area according to the return light signal subjected to photoelectric conversion; the visual imaging unit is used for shooting a visual image of the detection area; and the information fusion unit is used for fusing the calculated gas concentration of the target detection area into a visual image, and sending the fused visual image to the signal output display unit for visual display of the gas concentration.

The invention relates to a green light LED. The green light LED comprises an n-type layer, a multi-quantum well layer, a superlattice electron blocking layer, a p-type layer and a p-type electrode which are sequentially stacked on a substrate, the multi-quantum well layer comprises n periods of quantum well structures, each period of quantum well structure is formed by sequentially stacking an InGaN layer, a first GaN layer, an AlGaN insertion layer and a second GaN layer, and the Al component of the AlGaN insertion layer increases layer by layer in the direction from the substrate to the p-type layer; the superlattice electron barrier layer is composed of an AlGaN / GaN laminated layer with m periods and an AlGaN thick layer arranged on the laminated layer; due to the arrangement of the multi-quantum well layer and the superlattice electron barrier layer, the barrier height is effectively increased, electron leakage is reduced, the moving speed of hot electrons is relieved, faster diffusion of current carriers is promoted, the current congestion effect is improved, and better radiation luminescence performance and higher modulation bandwidth are achieved.

The utility model provides a sealed vibration test device, the sealed vibration test device comprises a sealed box body, a vibration test stand, and a vibration sealing member connecting the vibration test stand and the sealed box body, the vibration test stand comprises a vibration stand body and a moving coil used for outputting vibration, the sealed box body comprises a side wall, and the side wall is provided with an opening. A connecting through hole is formed in the side wall, the vibration sealing piece comprises a first fixing ring fixed to the moving ring, a second fixing ring surrounding the first fixing ring in the horizontal direction and an elastic sealing ring film connecting the first fixing ring and the second fixing ring, and the elastic sealing ring film is made of a flexible material. And the first fixing ring and the second fixing ring are arranged at an interval. According to the sealing vibration test device, the first fixing ring, the second fixing ring and the elastic sealing ring film are arranged, so that the sealing effect is achieved, and vibration can be prevented from being transmitted to the sealing box body from the vibration test bench.

The utility model relates to the technical field of instrument and meter hanging racks, in particular to an instrument and meter hanging rack device, which ensures the perpendicularity of a hook, is convenient for hanging and mounting an instrument, improves the convenience in use, shields the upper part of the instrument and meter, prevents the service life of the instrument and meter from being shortened due to sun exposure and rain wash, and prolongs the service life of the instrument and meter. Comprising a base, vertical rods are fixedly connected to the left end and the right end of the top of the base, a plurality of cross beams are installed between the two vertical rods through a height adjusting assembly, the height adjusting assembly comprises a plurality of height adjusting sliding sleeves, a plurality of fixing studs, a plurality of installation discs, a plurality of bearings and a plurality of rotary discs, and a plurality of hooks are installed on the cross beams through position adjusting assemblies. A top plate is fixedly installed at the top of the vertical rod and provided with an area adjusting assembly.

The invention discloses an online control method and system based on a direct-current charging pile, and relates to the technical field of charging pile management, and the method comprises the steps: building communication connection with the direct-current charging pile and charging equipment based on a control terminal, and obtaining an optimal communication channel; based on the optimal communication channel, the control terminal monitors the direct current charging pile and the charging equipment in real time; and based on the control terminal, data analysis is performed on the real-time state of the direct-current charging pile and the real-time state of the charging equipment, and the real-time state of the direct-current charging pile and the real-time state of the charging equipment are determined. The charging point protocols of the direct-current charging pile and the charging equipment are analyzed, the optimal communication channel is selected, the transmitted data have real-time performance, the control terminal analyzes the real-time data, the real-time states of the direct-current charging pile and the charging equipment are determined, regulation and control are conducted according to the real-time states of the direct-current charging pile and the charging equipment, and the real-time state of the direct-current charging pile and the charging equipment is controlled. The service life of the direct-current charging pile is prevented from being shortened due to over-high temperature, and the service life of the direct-current charging pile is prolonged.

The invention discloses a thermal management method and system of a power supply and an intelligent power supply, and the method comprises the steps: collecting m reference temperature data sets of m battery cells within a first preset time period; performing preprocessing operation on the m reference temperature data sets to obtain m temperature data sets; determining a first temperature value of the target power supply according to the m temperature data sets; predicting a predicted temperature value of the target power supply at the target moment according to the m temperature data sets and the first temperature value; determining a target working state of the target power supply according to the first temperature value and the predicted temperature value; and in a second preset time period, controlling a heat management module to perform heat management on the target power supply based on the first temperature value, the predicted temperature value and the target working state, so that the temperature of the target power supply returns to a preset temperature range. According to the embodiment of the invention, the thermal management effect of the power supply can be improved.

The invention provides a double-medium DBR type vertical cavity surface emitting laser and a preparation method thereof. The double-medium DBR type vertical cavity surface emitting laser comprises a conductive heat sink layer, a first metal electrode, a first medium DBR layer, a first transparent conductive layer, a first insulating medium layer and an active structure layer. The second dielectric DBR layer comprises a first dielectric dielectric layer, a second insulating dielectric layer, a second transparent conductive layer, a second dielectric DBR layer and a second metal electrode. The process is simple, the whole structure is of a plane structure, and a good heat dissipation function is achieved. By better limiting the optical field and the electric field and optimizing the current injection efficiency, the output power and the conversion efficiency of the laser device can be improved, and the working current density of the device can be improved and the optical power can be increased due to the excellent heat dissipation performance.

The invention discloses gas sampling equipment for environmental monitoring, and relates to the technical field of gas sampling detection, the gas sampling equipment comprises a working frame, a fixed frame plate and an accident protection mechanism are mounted at the bottom end of the working frame, the accident protection mechanism comprises a mounting ring groove, and mounting ring grooves and a collection mechanism are formed in the upper end and the bottom end of the outer periphery of the working frame. The collecting mechanism comprises a multi-head connecting pipe, a movable bottom frame and a plurality of fixed frame heads, the multi-head connecting pipe is mounted at the upper end of an inner cavity of the working frame, and the fixed frame heads are movably mounted at the upper end of the periphery of the inner cavity of the working frame. According to the device, the limiting moving mechanism is started to trigger the collecting mechanism, in the outdoor gas collecting and sampling process, gas at different time periods and different positions can be collected through different storage ends, the collected gas can be preliminarily detected in the gas collecting process, and the gas collecting efficiency is improved. And the detection result is wirelessly transmitted, so that a worker has simple judgment and analysis.