88results about How to "Improve affordability" patented technology

The invention discloses a full-automatic intelligent multifunctional high-order nonlinear fluorescence dynamics testing method and device, and relates to the field of nonlinear optics and nano photonics. An optical testing device composed of an exciting light generation module, an automatic power regulation module, an exciting light modulation module, a sample scanning module, a data acquisition and analysis module and an intelligent control module is established, and under the excitation of incident laser, based on the overall coordination of the intelligent control module, the optical testing device is established. Other modules are driven to complete the dynamic response test of a nonlinear fluorescence sample, and full-automatic intelligent, multifunctional, high-precision, simple, efficient, low-cost and universal fluorescence dynamic test analysis is realized. The problems that traditional manual operation wastes time and labor and the testing precision is low are solved. In addition, the multifunctional integration of the fluorescence response curve, the fluorescence rise time, the fluorescence lifetime and the fluorescence imaging effectively improves the test efficiency and the application scene, and greatly reduces the system cost.

The invention discloses a bionic joint with a locking mode and a one-dimensional spherical rotation motion mode, which comprises a base, and a first motion branch chain, a second motion branch chain and a third motion branch chain are connected to the base; the robot further comprises a fourth movement branch chain, and the first movement branch chain, the second movement branch chain and the third movement branch chain are all connected with the fourth movement branch chain. According to the bionic joint, the movement modes of the bionic joint can be changed through the driving motor, the output component is in the locked state, locking driving is not needed, and the output component can be kept in the locked state.

The invention relates to the field of soft soil area retaining wall design, and discloses a soft soil area roadbed slope self-anchored light soil retaining wall which comprises a first foundation, a second foundation is placed on the first foundation, and a road surface is laid on the second foundation; the two retaining wall bodies are symmetrically arranged and are piled on the two sides of the first foundation and the two sides of the second foundation; the concentration plate is arranged on the retaining wall main body, and one end of the concentration plate extends into the foundation I and the foundation II; the multiple grids are arranged, the corresponding grids are connected with one another, and the grids are arranged in the second foundation and the retaining wall body. Additional reinforcement treatment on the foundation is reduced, meanwhile, through the combined action of various mechanisms, a good meshing effect can be formed, displacement of soil particles is controlled, and the overall strength and stability of the roadbed and retaining wall structure are improved; the mutual traction effect of the roadbed and the retaining wall is increased, and the anti-overturning and anti-sliding capacity of the retaining wall is improved.

The electric fusion welding machine comprises a welding machine body, a movable grip, an adjusting knob, heat dissipation fins and an input interface, the adjusting knob is installed in front of the welding machine body, a state display screen is arranged on the left side of the adjusting knob, the heat dissipation fins are arranged below the state display screen, and an output interface is arranged below the heat dissipation fins. An output interface is arranged in the welding machine body, a binding post is arranged in the output interface, a supporting spring column is arranged below the welding machine body, supporting spring wheels are installed on the supporting spring column, supporting spring blocks are installed on the supporting spring wheels, and heat dissipation fins are arranged on the two sides of the welding machine body. The spring plate structure has a good damping effect, the spring plate structure has a good bearing effect, and the L-shaped interface grip fixedly connected above the power supply connector is matched with the limiting head on the power supply connector, so that plugging and unplugging can be facilitated.

The invention discloses a device and a method for crystal growth. The device comprises a vacuum furnace body system; the double-area heater comprises an upper heater and a lower heater which can be independently controlled, and the double-area heater is arranged in the furnace body and used for adjusting the temperature of the upper area and the temperature of the lower area to form the needed temperature gradient; the heat preservation structure is arranged in the furnace chamber and cooperates with the double-zone heater to form a stable upper high-temperature zone, a stable middle gradient zone and a stable lower low-temperature zone; the multi-rod crucible assembly is arranged in the thermal field in the thermal insulation structure and has the characteristic of symmetrical arrangement; and the crucible lifting mechanism is connected to the multi-rod crucible assembly and is used for adjusting the position of the crucible in the crystal growth process. According to the invention, the stability of the temperature field, the simplification of the structure and the reduction of the cost are realized, and the stress concentration is effectively reduced. Meanwhile, the method supports high-throughput crystal growth, increases the degree of freedom of growth crystal specifications, improves the component screening efficiency, shortens the crystal research and development period, and improves the production efficiency.

The present invention discloses a bimetallic composite oxide catalyst for residual oil suspension bed hydrocracking and its preparation. The catalyst is a composite metal oxide containing Zn metal and Fe metal, and is a nano-scale solid powder catalyst with strong catalytic performance and good dispersibility. It shows good reaction performance in the residual oil suspension bed hydrocracking process, and can be used to process inferior heavy oil and residual oil with high impurity content such as metal, sulfur, nitrogen, asphaltene, etc. The catalyst belongs to a composite metal oxide mainly composed of spinel. Compared with pure iron oxide and general composite metal oxide catalysts, the liquid yield is higher, and the gas and coke yields are significantly reduced. Compared with the traditional coprecipitation synthesis method, the present invention has the advantages that it can solve the problems of low yield and difficult to control product performance in the large-scale preparation of catalysts, and the process is simple, the raw materials used are cheap, the reaction temperature is low, and it has high economic practicality.

The present invention discloses a reducer oil seal precision press-fitting and air tightness testing device and method, including an oil seal press-fitting mechanism and a servo precision press-fitting system, a pneumatic pressure-maintaining mechanism and a reducer air tightness testing system, and a reducer operating mechanism and operating system. The device realizes the integration of the two processes of oil seal precision press-fitting and reducer air tightness testing for large robots, and realizes the automatic precision press-fitting of oil seals and the automatic air tightness testing of reducers. The present invention integrates the oil seal assembly of large-scale reducers and the air tightness testing capabilities of reducers through the one-time installation of reducers, thereby saving manpower and increasing efficiency. Through automatic oil seal precision press-fitting and air tightness testing, the clamping time of reducers is reduced, and the air tightness testing efficiency of reducers is improved. The device has a simple testing scheme, low development cost, strong economic applicability, and high pass rate, and is suitable for batch assembly and air tightness testing of cycloidal pinwheel reducers for large-scale robots.

The utility model discloses a construction fence which comprises a plurality of fence assemblies connected with one another, each fence assembly comprises a fence and a stone pier, and the fence is fixedly located at the top of the stone pier. The fence comprises a baffle plate, and a left side supporting plate, a right side supporting plate, a top supporting plate and a bottom supporting plate which are fixedly connected with the baffle plate; the baffle comprises a plurality of mounting plates which are fixedly arranged from top to bottom, the longitudinal vertical sections of the mounting plates are in a V shape, each mounting plate is obliquely arranged backwards and comprises an upper plate located at the upper end and a lower plate located at the lower end, and the width of the upper plate of each mounting plate is one half of the width of the lower plate. The rear side of the lower plate of each mounting plate is fixedly connected with the rear side of the upper plate of the mounting plate located below the lower plate, the upper plate of the uppermost mounting plate is vertical, and the lower plate of the lowermost mounting plate is horizontal; the mounting plates are integrally formed. The utility model has the advantages of being convenient to install, simple to carry and high in strength.

The utility model discloses a double-door four-folding cover which comprises a frame main body, a first door, a middle plate and a second door are respectively arranged in one side of the frame main body, and hinge assemblies are arranged between the first door and the middle plate and between the second door and the middle plate. Telescopic rods are arranged between a second positioning block arranged on a back beam of the frame body and a first positioning block arranged at a corner of the back of the first door and between a second positioning block arranged at a corner of the back of the second door, and lock catch assemblies are arranged between the first door and the frame body as well as between the second door and the frame body, and supporting and tensioning assemblies are arranged in the middle of the back of the first overhead door and the middle of the back of the second overhead door. The first opening door and the second opening door are arranged in the direction close to a driving license, objects can be conveniently taken out, practicability is improved, the supporting and tensioning assemblies are additionally arranged below the first overhead door and the second overhead door, the bearing capacity is improved, meanwhile, the side edges of the overhead doors are attached to the frame body, and the safety of the overhead doors is improved. And the internal sealing performance is improved.

This invention discloses a method for preparing sulfonamide-modified benzo[a]fluorene-5-one derivatives, using 1,7-enyne and N Using sulfonylaminopyridine salts as raw materials, a series of sulfonated benzo[a]fluorene-5-one compounds were successfully synthesized by catalyzing the sulfonation / cyclization tandem reaction of 1,7-enynes under photocatalytic conditions. This method has excellent functional group tolerance and high economic applicability.

The utility model discloses a kind of heating and ventilation pipeline connecting devices, relate to pipeline connecting technical field. Including two opposite flange's heating and ventilation pipeline, further include: tight sleeve ring, tight sleeve ring is corresponding two groups between two heating and ventilation pipelines and is sleeved on heating and ventilation pipeline;And first push sleeve structure and second push sleeve structure, first push sleeve structure and second push sleeve structure are respectively sleeved on two heating and ventilation pipelines, second push sleeve structure one end can be inserted into first push sleeve structure and carry out screw connection, first push sleeve structure and second push sleeve structure between screw cooperation to simultaneously push two groups of tight sleeve ring and press in the flange of respective corresponding side heating and ventilation pipeline, so that the flange of two heating and ventilation pipelines is butted and is pressed tightly.

The utility model relates to an engineering machinery spring rolling clamp which comprises a clamp body, the right end of the clamp body is fixedly connected with a fixing plate, an electric push rod is installed at the upper end of the fixing plate, the power output end of the electric push rod is fixedly connected with an upper clamping plate, and the right end of the clamp body is fixedly connected with a lower buffering plate located on the lower side of the upper clamping plate. The lower buffering plate comprises a lower clamping plate fixedly connected with the clamp body, the outer end of the lower clamping plate is sleeved with an outer protection frame, two symmetrical buffering wrapping layers are arranged between the outer protection frame and the lower clamping plate, a threaded hole is formed in the bottom end of the outer protection frame, a threaded rod is connected into the threaded hole in a threaded mode, and the upper end of the threaded rod makes contact with and abuts against the lower clamping plate. And the buffering wrapping layer comprises the first buffering layer and the second buffering layer, the first buffering layer is located on the outer side of the second buffering layer, when the round steel is bent, the lower clamping plate can be protected and cooled, the lower clamping plate is not prone to damage in the long-term use process, and the service life of the lower clamping plate is prolonged.

The utility model discloses casting slag ladle manufacturing equipment which comprises a ladle body, a trunnion, a ladle body reinforcing rib, a tank car fixing lug and a ladle bottom radian, the ultrasonic flaw detection percent of pass of the trunnion reaches 100% through an accurate trunnion pre-embedding device and a reasonable sand mould manufacturing process, and the structural strength and rigidity are enhanced through unique ladle body design and reinforcing rib layout. The bearing capacity is improved, deformation is reduced, and the service life is prolonged. In the aspect of the production process, the sand mold manufacturing mold is split by the horizontal center line of the tank car fixing lug, and sand mold manufacturing is efficiently and accurately completed; the box closing device is matched with the pouring system, smooth box closing pouring is guaranteed, the rejection rate is reduced, the production period is shortened, and the efficiency is improved. In the aspect of cost control, the equipment process is optimized, the yield is improved, the waste loss is reduced, meanwhile, equipment such as a sand mold manufacturing mold is durable, the maintenance cost is reduced, the safety accident risk caused by slag ladle faults during steelmaking slag conveying is effectively reduced, and the personnel safety and the production order are guaranteed.

The utility model discloses a ship hole safety protection device which comprises an H-shaped main support, two parallel edges of the main support are the same in structure, a telescopic support is slidably arranged in the parallel edges and comprises two telescopic rods and an elastic piece, the two telescopic rods are arranged at the two ends of the parallel edges respectively, one end of each telescopic rod extends out of the corresponding parallel edge, and the other end of each telescopic rod extends out of the corresponding elastic piece. The two ends of the elastic piece are connected with the telescopic rods at the two ends of the parallel edge respectively, the ends, extending out of the parallel edge, of the telescopic rods are provided with fork heads used for clamping a ship body steel plate, and an adjusting unit is arranged between the parallel edge and the telescopic support and used for adjusting the length, extending out of the parallel edge, of the telescopic rods. According to the ship hole safety protection device, the protection space of the protection device is increased, the bearing capacity of the protection device is improved, the stability of the hole safety protection device during use is improved, and the ship hole safety protection device can be suitable for safety protection of holes of different sizes and can be repeatedly used.

The invention is suitable for the technical field of electrolyte preparation, and provides 2, 5-dibutyl adipic acid as well as a preparation method and application thereof. The conductivity of the prepared 2, 5-dibutyl adipic acid can reach up to 1475S / cm only when the mass content of the 2, 5-dibutyl adipic acid in ethylene glycol is 4.3%, and the problem that the equivalent series internal resistance of a capacitor is increased due to the fact that the conductivity of a traditional electrolyte is low is solved. Compared with adipic acid, the polarity is enhanced, and the solubility in ethylene glycol is correspondingly improved. And due to the electron donating effect of the alpha-branched chain, when the 2, 5-dibutyl adipic acid is used as the electrolyte, the chemical self-repairing capability of the branched chain carboxylate and ethylene glycol system electrolyte can be enhanced, which is of great significance for improving the performance of the aluminum electrolytic capacitor. Due to the characteristics, a wide prospect is provided for manufacturing a capacitor product which is high in voltage resistance, low in effective resistance, high in ripple current bearing capacity, high in heat resistance and long in service life by using an ethylene glycol system containing branched-chain dicarboxylate.

The invention relates to the field of power system protection, and discloses a method for solving an alternating current side short circuit impact current in an optical storage system, and the method comprises the steps: analyzing a topological structure, an impedance characteristic and a current layout of an alternating current side element, so as to monitor the real-time electrical parameters of the alternating current side element in the optical storage system; extracting short-circuit current characteristics in the historical short-circuit event from the historical operation data of the AC-side component to analyze a historical short-circuit type; identifying abnormal current in the real-time electrical parameters, and analyzing the current short circuit type of the alternating current side element; analyzing the impact risk level of the current short-circuit impact current on the alternating-current side component to construct a fault detection mechanism and a short-circuit protection device of the alternating-current side component; and processing the current short-circuit impact current in combination with a fault detection mechanism and a short-circuit protection device to obtain a current short-circuit impact current processing result. According to the invention, the fault source position can be accurately positioned, the response speed is improved, and stable operation of the optical storage system is maintained.

The utility model relates to a horizontal explosion-proof battery pack and a vehicle. The horizontal explosion-proof battery pack comprises a box body, the battery pairs are arranged in the box body, each battery pair comprises a first battery assembly and a second battery assembly which are oppositely arranged, and the oppositely arranged side walls of the first battery assembly and the second battery assembly are each provided with an anti-explosion valve used for providing a spray flow path; and the protection part is arranged in the box body and is positioned between the first battery assembly and the second battery assembly, and the protection part comprises a curved surface part facing the first battery assembly corresponding anti-explosion valve and the second battery assembly corresponding anti-explosion valve. And through the protection piece, the fire particles can be prevented from impacting other battery assemblies, so that the probability of overall thermal runaway of the battery pack is reduced. Meanwhile, due to the arrangement of the curved surface part on the protection part, on one hand, the particles with fire are obliquely erupted to the protection part at a certain angle, and on the other hand, the contact area with the particles with fire is increased by the curved surface part, the impact of the particles with fire on the protection part is reduced, and the safety of the battery is effectively improved.

The utility model discloses a vehicle girder structure which comprises longitudinal beams, cross beams and a reinforcing beam, a plurality of cross beams are fixed on the two longitudinal beams, the reinforcing beam is further fixed at one end of each longitudinal beam, and the reinforcing beam is located on the end portion of a girder close to a vehicle head. The stiffening beam is located at the head position of the girder, the stiffening beam needs to be connected with a vehicle head at the position, the number of functional components is large, a vehicle can be provided with a mechanism for supporting a compartment to tilt at the position, and therefore the damage risk of the girder at the position is large. The reinforcing beam is fixed between the two longitudinal beams, the bearing capacity and the shear and deformation resistance are enhanced, after reinforcement, larger prestress can be borne, other functional components can be installed at ease, the connection performance with a vehicle head is enhanced, the safety coefficient is improved, and the service life is longer.

The invention relates to the technical field of intelligent street lamps, in particular to an automatic protection type intelligent street lamp which comprises a lamp pole, a lamp post, a first-stage buffer assembly, two second-stage buffer assemblies, a positioning assembly, a driving assembly and a safety assembly. The supporting assembly is arranged in the lamp post; the supporting assembly comprises a fixing column; the stress plate is mounted on the inner side wall of the lamp post in a sliding manner; the rotary drum is rotationally arranged on the fixed column in a sleeving manner; the mounting ring is rotationally arranged at the bottom of the lamp post in a sleeving manner; and the support frame is fixedly mounted on the outer side wall of the rotary drum. Compared with the prior art, through the arrangement of the supporting frame, the stress plate and the driving assembly, the impact direction can be recognized, the stress plate is accurately adjusted to the damaged direction through the driving assembly, force is guided to the ground through the supporting frame, the risk that impact force directly acts on the waist of the lamp pole to cause breakage is avoided, quick response can be achieved under strong impact, and the service life of the lamp pole is prolonged. And the stress plate is moved to a designated position, and the effects of rapid supporting and impact force dispersing are achieved.

This application relates to the field of metal film capacitor technology, and provides an end-plate type high-current metal film capacitor for PCB circuit boards, including a housing, a core, end plates, and potting compound. The core is installed in the internal cavity of the housing, and the potting compound fills the remaining area of ​​the internal cavity of the housing. End plates are welded to both end faces of the core, and the outer surfaces of all end plates are in close contact with the corresponding inner walls of the housing. The upper part of the end plate is bent and supported on the corresponding positioning groove. Positioning protrusions are provided at both ends of the end plate, and the positioning protrusions are embedded in the corresponding positioning grooves. The width of the positioning grooves is the same as the width of the positioning protrusions. The end plates adopt a two-piece structure with the same polarity. The core is made of metallized polypropylene film wound together. The coating of the metallized polypropylene film is a mesh safety film with a diamond pattern design. The tops of all end plates are exposed on the upper surface of the potting compound. This application can control the capacitance decay rate and extend the product life.

The invention relates to a method for preparing long single-stranded DNA (deoxyribonucleic acid). The method comprises the following steps: (1) synthesizing a target gene into a plasmid vector to obtain target double-stranded DNA; (2) modifying the target double-stranded DNA based on phosphorus-sulfur acylation to obtain sulfur acylation modified double-stranded DNA; (3) digesting the phosphorus-sulfur acylation modified double-stranded DNA by using Lambda exonuclease to obtain long single-stranded DNA to be purified; (4) recovering and purifying the long single-stranded DNA to be purified through agarose gel electrophoresis and gel cutting to obtain target long single-stranded DNA; the method for preparing the long single-stranded DNA, provided by the invention, is suitable for laboratories or enterprises on a large scale, effectively reduces the cost, improves the purity of the long single-stranded DNA, improves the yield, and has high reproducibility.

The invention relates to the technical field of subway monitoring, in particular to an automatic subway monitoring and early warning system based on artificial intelligence, which comprises a hygrothermograph, an ultrasonic radar, a thermal imager and a central processing module, the central processing module corrects the tunnel ultrasonic point cloud according to the temperature in the tunnel and the relative humidity in the tunnel and generates a temperature position point cloud after registering the tunnel infrared image with the ultrasonic point cloud, and the difference between the temperature position point cloud and a laser point cloud in the prior art is that each point in the temperature position point cloud has a corresponding temperature. The temperature position point cloud represents the tunnel structure and also represents the temperature distribution in the tunnel, and the technical feature of the temperature position point cloud helps a subway monitoring neural network model to more easily diagnose tunnel diseases caused by temperature changes. According to the invention, the multi-modal fusion technology, the ultrasonic point cloud scanning technology and the infrared imaging technology are combined to realize multi-modal, moisture-resistant and high-reliability metro automatic monitoring and early warning.

The double-conical-surface connecting device comprises a front-end frame and a rear-end frame, a concentric conical column connector of the front-end frame is connected with a conical column connector of the rear-end frame, and a fixing ring and an adjustable fastening ring set which are fixedly connected are connected to the outer portion of the front-end frame in a sleeving mode. And the adjustable fastening ring group is positioned at one end close to the rear-end frame and can smoothly move on the front-end frame. According to the double-conical-surface connecting device suitable for the distributed chassis, connection and separation operation can be completed by controlling the power-on state and the power-off state of the powerful electromagnetic ring base, and complex tools and a large amount of manual operation are not needed; compared with a traditional bolt connection mode, the disassembly and assembly time is greatly shortened, and the working efficiency is improved; under the condition that the distributed chassis needs to be frequently disassembled, replaced, maintained or adjusted, the convenience can save the time period and the cost.

The composite tooling of the hollow glass of the present invention comprises a rectangular frame, and a positioning device and a multi-directional linkage mechanism installed on the frame. A plurality of positioning devices are used. The positioning devices on the left and right sides of the frame are respectively connected to the first driving device and driven by the first driving device. The first driving device is also connected to the multi-directional linkage mechanism. The multi-directional linkage mechanism is connected to the positioning devices on the front and rear sides of the frame via the second driving device, thereby driving the movement of the positioning devices on the front and rear sides of the frame; the positioning device is used for positioning and aligning the outer edges of each layer of glass and the keel. The present invention has a simple structure, convenient operation, and high cost performance. It improves the relative position dimensional accuracy of the composite hollow glass, increases the overall strength of the hollow glass, reduces cracking, and facilitates the modular assembly installation of the hollow glass. The present invention changes the traditional composite method of hollow windows, and can realize the rapid positioning of the lower glass, the rapid installation of the middle keel, and the rapid composite of the upper glass.

The utility model relates to rolling mill equipment technical field discloses a 230 roll box eccentric sleeve locating bearing seat structure, including fixed connection's first annular portion and second annular portion, first annular portion is equipped with five first arc opening and two groups of symmetrical second arc opening, and the threaded hole is set up in the corresponding position of second annular portion. Through first annular portion and second annular portion eccentric integration design, combine five 60 degrees first arc opening and two groups of 36 degrees symmetrical second arc opening, construct 9 point bolt stress network, effectively solve the uneven bolt stress problem under eccentric structure. Through practice verification, the structure can make the rolling mill operation cycle from the original extension to 12 months, the roll ring wear rate drops 40%, significantly improves equipment stability and service life, is suitable for bearing positioning of high -speed wire rod rolling equipment, has good application value.

The present invention relates to the field of audio processing technology, and discloses a Bluetooth speaker with a hidden interface protection mechanism, comprising an audio shell, a mesh plate, a speaker module, a control panel and an expansion interface, wherein the mesh plate is fixedly connected to the outer side wall of the audio shell, the speaker module is arranged inside the audio shell, and the control panel is fixedly connected to the upper surface of the audio shell; when a first circular plate slides inside a first limiting sleeve, it squeezes a first spring, and the first spring absorbs energy and elastically contracts when squeezed, so that the kinetic energy generated by the vibration of the speaker module can be buffered through the elastic contraction and rebound of the first spring, so that the speaker module is prevented from rigidly contacting the audio shell when vibrating for sound and driving the audio shell to vibrate together, thereby reducing the noise generated by the vibration of the audio shell and the speaker module together, and also preventing the internal parts of the audio shell from loosening and falling off due to high-frequency vibration during use when the audio shell and the speaker module vibrate together.

The invention discloses a method for detecting digoxin related substances. The method comprises the following steps: using a high performance liquid chromatograph to detect a test solution, adopting a C18 chromatographic column, using acetonitrile as a mobile phase A, using water as a mobile phase B, and performing gradient elution: from 0 to 23 minutes, the mobile phase A is 25%; from 23 to 45 minutes, the mobile phase A is increased from 25% to 40%; from 45 to 55 minutes, the mobile phase A is increased from 40% to 80%; from 55 to 55.5 minutes, the mobile phase A is reduced from 80% to 25%; and then balancing for 60 minutes with the mobile phase A being 25%. The detection method of the invention is used to separate and determine the related substances in digoxin raw materials and preparations, especially digoxin injections. The method has many detectable impurities, good separation between peaks, high sensitivity, good repeatability and recovery rate, and can control 10 key known impurities and 6 unknown impurities, thereby facilitating the quality control of digoxin preparations.

The utility model discloses an optical fiber coupling type acousto-optic device and an optical fiber laser, and relates to the technical field of acousto-optic devices. The optical fiber coupling type acousto-optic device comprises a shell with a containing cavity, an acousto-optic crystal and a matching circuit board which are arranged in the containing cavity, a piezoelectric transducer arranged between the acousto-optic crystal and the matching circuit board, and a radio frequency signal connector connected to the shell and located on the side, away from the acousto-optic crystal, of the matching circuit board. The input collimator and the output collimator are connected to the shell and distributed on the two opposite sides of the acousto-optic crystal; a first shielding part and a first light transmitting part are arranged at the position, close to the first side wall, of the shell, the first shielding part is provided with a first columnar face arranged on the first side wall in a concave mode, an opening of the first columnar face faces the containing cavity, and the first shielding part is used for preventing zero-order diffraction light and / or second-order diffraction light from entering the output collimator; the first light transmitting part is used for transmitting the first-order diffraction light and then enabling the first-order diffraction light to enter the output collimator. The optical fiber coupling type acousto-optic device and the optical fiber laser can improve the bearing capacity of optical power.

The present invention relates to the field of coating, and specifically to a surface coating process for an optical component product, comprising the following steps: step 1, cleaning and drying a zinc selenide substrate to obtain a pre-treated zinc selenide substrate; step 2, preparing a coating material, the coating material comprising iridium indium selenide, zinc selenide, and yttrium fluoride, grinding and screening; step 3, placing the pre-treated zinc selenide substrate in a coating device, then adding the coating material, and coating layer by layer to obtain a coated optical component product. The process of the present invention is not only simple to operate, but also has a high quality of the obtained coating, and the coating has the advantages of being uniform and dense, having good adhesion, and being resistant to moisture and heat.

The utility model discloses a kind of electric vehicle active suspension based on multi-chamber air spring, including air spring body, the front and rear sides of air spring body are connected with air cavity assembly, and air cavity assembly includes secondary air chamber, solenoid valve and connecting pipe, the lower end of secondary air chamber is connected with connecting pipe, and solenoid valve is installed on connecting pipe, the upper end of air spring body is connected with support assembly, and the upper end of support assembly is connected with center stress plate, the lower end of air spring body is connected with straight frame component. The electric vehicle active suspension based on multi-chamber air spring compared with the existing ordinary electric vehicle active suspension, the equipment also uses solenoid valve to control damping force, so as to make equipment keep good stability, reduce the damage of each shock to minimum, the equipment can play protective effect to the chassis of vehicle, reduce the impact force of shock to chassis cause damage.