88results about How to "Weakening range" patented technology

An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the roadwheels of a vehicle, a torque sensing means adapted to produce a first output signal indicative of the torque carried by a portion of the steering mechanism, a means for producing a second output signal indicative from a signal indicative of the angular velocity of the portion of the steering mechanism, an electric motor operatively connected to the steering mechanism, a signal processing unit adapted to receive the two output signals and to produce therefrom an overall torque demand signal representative of a torque to be applied to the steering mechanism by the motor, and a motor drive stage adapted to provide a drive current to the motor responsive to the torque demand signal. The overall torque demand signal includes a damping component that is dependent upon the second output signal. The means for producing the yaw damping component includes a filter having one pole and one zero, and in use the second signal is passed through the filter to produce the damping component, the frequency of the pole and zero being selected such that the filter provides a band between the pole and zero within which the phase of the filtered second signal and the velocity signal are further out of phase or in phase than within the band.

The invention relates to the technical field of high polymer materials and preparation thereof, and discloses a wet anti-slip bionic friction pad on a glass surface, which is inspired by a micro-nano structure of toe pads of organisms such as tree frogs and long-horned grasshoppers with wet friction increasing characteristics, and a bulge array is added on the surface of a high-friction material, so that the friction coefficient of the friction pad is increased; the microstructure arrays can discharge a water film on the surface of the friction pad under the capillary action in a wet environment, and the effective contact area between solids is increased, so that the friction pad and a friction surface are always kept in a dry friction state, and stable friction force is ensured. The friction pad comprises a connecting layer, a supporting layer and a tail end protruding straight column array, a tail end contact layer is in a hexagonal straight column shape, the diameter of an inscribed circle of a hexagonal micro-column structure ranges from 5 micrometers to 5000 micrometers, column bodies are densely arranged in a hexagonal mode, the height of the column bodies ranges from 10 micrometers to 1500 micrometers, the tail ends of the column bodies are planes, the interval between every two column bodies ranges from 2 micrometers to 600 micrometers, and tight drainage grooves are formed.

The invention discloses a communication network power distribution cabinet convenient for heat dissipation, and relates to the technical field of power distribution cabinets, and the power distribution cabinet comprises a composite mechanism. According to the communication network power distribution cabinet convenient to dissipate heat, through the design of a composite mechanism, the box body shell is used for storing electronic components, after long-time operation, the temperature in the box body shell rises, hot gas rises, and then the hot gas flows to the processing mechanism from the circular groove, so that the heat dissipation effect is achieved, and the internal temperature of equipment is reduced; the ventilation mechanisms are arranged on the two sides of the box body shell, so that the convection effect is achieved, the cold air flowing effect is improved, the cold air is located at the low position with the high density, hot air is squeezed upwards after entering the box body shell, the discharging speed is increased, and the heat dissipation efficiency is improved. The box body shell is supported through the supporting assembly, so that the effect of reducing deformation of the box body is achieved, and internal electronic elements are protected.

A flywheel front cover and a flywheel rear cover are buckled to form a vacuum spherical shell, front-end electromagnetic poles are evenly distributed on the inner side of the flywheel front cover, rear-end electromagnetic poles are evenly distributed on the inner side of the flywheel rear cover, permanent magnet magnetic poles are evenly distributed on an outer hub of a flywheel, and permanent magnet magnetic poles are evenly distributed on an inner hub of the flywheel rear cover. When a ship jolts and shakes due to the influence of storm waves or ocean currents, the flywheel rotates at a high speed in the vacuum spherical shell in the left-right direction of the flywheel shaft, large rotational inertia is generated when the flywheel rotates at the high speed, and through energy transmission of the right side supporting damping cylinder, the left side supporting damping cylinder, the right side supporting damping cylinder rod and the left side supporting damping cylinder rod, the flywheel can rotate at the high speed. The energy for driving the vacuum spherical shell to swing left and right and horizontally is consumed, so that the rolling amplitude and frequency of the ship are greatly reduced, the course stability is improved, and the rolling amplitude and frequency of the ship can be reduced.

The invention discloses a dynamic frequency adaptive automatic gain control system, which belongs to the field of dynamic frequency adjustment and comprises a radio frequency power amplifier, an attenuator, a logarithmic detector, a low-pass filter and a comparison and control signal generation module. The amplified radio frequency signal is input into the attenuator; the attenuator attenuates the signal so that the input radio frequency signal reaches a range suitable for detection of the logarithmic detector after attenuation; the logarithmic detector converts the radio-frequency signal into a direct-current voltage proportional to the signal power; voltage signals of direct-current voltage output by the logarithmic detector are smoothed through a low-pass filter, and rapidly changing components are removed; and the comparison and control signal generation module compares the smoothed voltage with a reference voltage, generates a control signal for adjusting the gain, and adjusts the gain. According to the invention, instant gain adjustment is provided under the condition of rapidly changing signals, and the energy efficiency of the system is improved.

The invention discloses a power transmission line anti-galloping phase-to-phase spacing device, which belongs to the technical field of power transmission lines, and is characterized in that two connecting plates, two connectors, two cross universal joints and two rod type composite insulators are arranged between two adjacent six-split damping spacers; each connecting plate is connected with a cross universal joint through a connector, and the cross universal joints are further connected with the ends of the rod type composite insulators. A hydraulic shock absorber is arranged in the middle of the two rod type composite insulators; a damping ball is arranged in the center of a triangle formed by the rod type composite insulators; an outer viscous damper, a first connecting rod and a second connecting rod are arranged between the hydraulic shock absorber and the damping ball; the first connecting rod and the second connecting rod are connected to the two sides of the outer viscous damper respectively, the damping ball is connected with the first connecting rod, and the hydraulic shock absorber is connected with the second connecting rod through the connecting ferrule. The problems that in the prior art, under the long-time line use condition, wires are damaged, the safety of a power transmission line is affected, and cost is high are solved.

The invention provides a nursing bed convenient for a patient to trigger a pager, and relates to the field of medical pagers, the nursing bed comprises a signal control assembly, the signal control assembly is composed of a signal pager, an adjusting assembly, a positioning assembly and an auxiliary calling assembly, the signal control assembly can call through a pressing switch on a wearing ring worn on a finger of a patient and can be realized through a fine pressing action of a hand, and the bed body assembly has a function of adjusting the use height, can adapt to nursing of patients with different body types, is convenient for the patient to get in and out of the bed, and is convenient to use. The problems that for a patient who is heavier in illness state or limited in limb movement, it is difficult for the patient to press a button of a signal beeper to achieve calling operation, a bed body cannot adapt to nursing of patients of different body types, and when the patient gets out of the bed, the feet of the patient cannot make contact with the ground possibly and fall down easily are solved.

The invention relates to the technical field of medical equipment, in particular to an intelligent anorectal drug delivery system. Comprising a conveying pipe, a medicine conveying pipe and a convex-point air bag; comprising a guide tube and an imbedding part for supporting the air bag; a power unit; an image acquisition unit; a resistance acquisition unit; when it is judged that the preset air pressure of the supporting air bag does not meet the supporting preset standard, the preset air pressure of the supporting air bag is reduced; preliminarily judging whether the conveying of the conveying pipe meets a preset standard or not based on the resistance of the power wheel; when it is secondarily judged that conveying of the conveying pipe does not meet the preset standard based on the resistance fluctuation frequency of the power wheel, the driving speed of a first driving motor and the driving speed of a second driving motor are reduced; and the control unit is used for increasing the volume of the bump air bag and judging whether the administration process of the administration part meets the preset administration standard or not according to the target area drug coverage rate when judging that the volume of the bump air bag does not meet the preset standard according to the contact threshold value, so that accurate and quantitative administration of the administration system is realized.

The invention relates to the technical field of sensor signal processing, in particular to a vibrating wire sensor anti-interference circuit and device, and the circuit comprises an interference suppression circuit, a differential amplification circuit, a clamping circuit, a low-pass filter circuit, a zero cross detection circuit and a processing module. The input end of the interference suppression circuit is used for being connected with a vibrating wire sensor, the output end of the interference suppression circuit is connected to the input end of the differential amplification circuit, the output end of the differential amplification circuit is connected to the input end of the clamping circuit, the output end of the clamping circuit is connected to the input end of the low-pass filtering circuit, and the output end of the low-pass filtering circuit is connected to the input end of the vibration wire sensor. The output end of the low-pass filter circuit is connected to the input end of the zero-cross detection circuit, and the output end of the zero-cross detection circuit is connected to the processing module. According to the invention, interference signals can be removed so as to obtain accurate signals to be detected.

The invention discloses a DPD feedback signal gain compensation method and device, a medium and a product, and relates to the technical field of communication. The method comprises the following steps: after an original signal is amplified to form an amplified signal, carrying out sampling and analog-to-digital conversion processing on the amplified signal to obtain IQ sampling signals; carrying out normalization processing on the IQ two-path sampling signals to obtain a feedback signal in a complex signal form; under the condition that first power is determined according to the root-mean-square of the original signal, second power is determined according to the root-mean-square of the feedback signal; determining an amplitude difference between the feedback signal and the original signal based on the first power and the second power; performing amplitude alignment adjustment on the feedback signal according to the amplitude difference and the amplitude of the original signal; and based on the time delay of the original signal, carrying out time delay alignment adjustment on the amplitude alignment signal. According to the invention, the nonlinear effect of the power amplifier is effectively controlled and compensated, the signal-to-noise ratio of signals is improved, the bit error rate is reduced, and the condition of signal distortion is reduced.

The application relates to the technical field of chip design, in particular to an AI-based DDR5 memory interface chip adaptive method and system.The method comprises the following steps: obtaining a configuration instruction stream, extracting current and historical configuration instructions, and predicting target pins, switching time and target modes.Before the switching time, target electrical parameters are calculated according to pin electrical characteristics, historical switching records and channel load characteristics.During the switching, the target parameters are loaded and the temporary impedance matching network is switched in.After the switching, a fine-tuning increment is generated according to the deviation of the signal quality and the threshold value, and the updated electrical parameters are obtained by superposition, and the matching network is disconnected after the updated electrical parameters are written back to the register.According to the timing error and the fine-tuning increment generated by multiple switching, the weight parameters are updated and deployed back to the chip.Through AI prediction and the dynamic switching and fine-tuning of the temporary impedance matching network, seamless, stable and low-delay mode switching of the memory interface chip in the reconfigurable computing system is realized.

The utility model discloses a kind of anti-slip wire reinforcing rib square tubes with stretch hole structure, it is related to square tube field, including square tube body, the surface of square tube body is equipped with stretch hole at equal intervals, and square tube body surface is provided with wide hole, and square tube body inside is provided with support mechanism, and support mechanism provides support force for square tube, the surface of square tube body is provided with protection mechanism, and protection mechanism protects square tube body. The anti-slip wire reinforcing rib square tube with stretch hole structure, the surface of square tube body is equipped with stretch hole with the diameter of 4.5mm at equal intervals, the interval between adjacent stretch hole is multiple of 12.5mm, to effectively prevent the phenomenon of slippage;Meanwhile, the surface of square tube body is also arranged wide diameter hole with the diameter of 9.5mm at equal intervals, the interval of adjacent wide hole is multiple of 200mm, by the setting of such stretch hole structure, further enhance the effect of anti-slip.

This invention relates to the field of vehicles, providing a housing structure, a rear bumper assembly, a vehicle body, and a vehicle. The housing structure includes a housing body with a receiving groove for accommodating a pressure relief valve on a rear side panel. The housing body can be positioned on the outside of the rear side panel of the vehicle, and an exhaust passage communicating with the pressure relief valve is formed between the receiving groove and the rear side panel. The exhaust passage has an exhaust port facing the rear end of the vehicle. When the vehicle is in motion, the airflow outside the vehicle bypasses the housing body and flows towards the rear end of the vehicle. Since the exhaust port of the exhaust passage faces the rear end of the vehicle, the airflow outside the exhaust passage passing through the exhaust port causes minimal pressure changes within the exhaust passage, resulting in minimal pressure differential fluctuations between the exhaust passage and the inner side of the rear side panel. This effectively reduces the frequency and amplitude of the pressure relief valve's flapping action, thereby reducing low-frequency noise generated by pressure differential fluctuations in the acoustic cavity and ensuring passenger comfort.

This utility model discloses a receiver-type automotive fuel level sensor, including an electrical box, a signal output line, and a flange. A probe rod is installed at the bottom of the electrical box, and the flange is installed on the outside of the probe rod. A monitoring and control mechanism is provided inside the probe rod, and a gauging groove is provided inside the probe rod. A float is slidably connected to the inner wall of the gauging groove. The probe rod has an oil inlet and an exhaust port. The gauging groove is connected to the external space through the oil inlet and the exhaust port. The monitoring and control mechanism includes a combined sensor, a PLC control unit, and a telescopic rod. By dynamically adjusting the opening of the exhaust port through the telescopic rod, large fluctuations in the fuel level in the gauging groove are suppressed, and the pressure in the internal space of the gauging groove above the float is increased, making the float more stable, reducing the frequency and amplitude of shaking, and reducing the displacement signal fluctuation caused by the inertia of the float, so that the fuel level signal transmitted to the instrument is more stable.

The utility model discloses an anti-explosion storage battery box which comprises a box body and a cover body, a top opening is formed in the top of the box body, a containing cavity is formed in the box body, anti-collision cotton is arranged in the box body, a plurality of anti-collision grooves are formed in the box body, and rubber strips are arranged in the anti-collision grooves; the cover body can be detachably and totally closed and seal the top opening position of the box body, the cover body partially extends into the top opening position of the box body, and anti-collision cotton is arranged on the side wall, extending into the box body, of the cover body; the anti-collision cotton can absorb energy and buffer when the battery body collides, and for the battery body with cooling liquid, the cooling liquid can be absorbed by the damping cotton when leaking, and if the cooling liquid corrodes components such as a battery body shell or a circuit board, the cooling liquid can be absorbed, so that the corrosion condition is prevented, and the service life of the battery body is prolonged. And if the cooling liquid has flame-retardant and electric leakage characteristics, the anti-collision cotton also has the same performance so as to ensure that the use effect of the anti-collision cotton is remarkable.

The present invention discloses a multi-node server data processing device, which relates to the technical field of multi-node servers; it comprises a service cabinet and a plurality of server units, the service cabinet is provided with a cabinet slot for installing a plurality of server units, and a heat dissipation and noise reduction component is installed on the service cabinet; a plurality of support frames are fixedly installed in the cabinet slot, and the server units are placed on a plurality of support frames at the same height through the installation components, and a heat conduction and noise reduction component matched with the heat dissipation and noise reduction component is installed on the server units. The advantages are: under the premise of satisfying the overall required heat dissipation, the vibration and noise generated by air cooling in the device are effectively reduced, the protection of the working environment of the server nodes is improved, and the accuracy of the work of the server nodes is improved.

The invention discloses a method for dismantling a guide pipe support and a clamp in a deep-cavity narrow multi-dimensional space, which comprises the following steps of: adopting a configured cutting tool, extending a saw blade of the cutting tool into the deep-cavity space of a workpiece through a long circular hole of the workpiece, and extending the saw blade into the clamp of the guide pipe support; the blade surface of the saw blade is required to face the hoop, then the handle operation part of the cutting tool is pulled back and forth by hand, the blade of the saw blade is used for cutting the hoop, the hoop used for fixing the guide pipe is separated from the support, after cutting is completed, the saw blade is withdrawn from the oblong hole of the workpiece, then the angle section bolt connected with the support is detached from the outer side of the workpiece, and the cutting tool is used for cutting the guide pipe. Therefore, the clamp and the support can be dismounted. By the adoption of the dismounting method, the requirement for maintaining the guide pipe in the deep-cavity narrow multi-dimensional space can be met, parts in the narrow space can be conveniently dismounted, and the dismounting method is particularly suitable for being popularized and applied in the field of deep-cavity narrow multi-dimensional space repairing.

The utility model discloses a screening mechanism for high-purity fused quartz processing, which belongs to the technical field of high-purity fused quartz processing and comprises a shell, a screening disc is mounted in the shell in a sliding manner, leakage-proof rings are fixed at the top and the bottom of the screening disc, sleeves are uniformly fixed on the outer side of the screening disc, and the sleeves are sleeved on the screening disc. Limiting frames are evenly arranged on the outer side of the shell, and sliding rods are fixed to the interiors of the limiting frames. Through cooperative use of the shell, the screening disc, the leakage-proof ring, the sleeve, the limiting frame, the sliding rod, a first spring, a through opening, a containing disc, a discharging hopper, a rotating shaft, a rotating ring, a first protruding block, a second protruding block, a brush plate and a motor, powder on the screening disc can be screened, and meanwhile meshes of the screening disc can be dredged; and the mesh dredging rate of the screening disc is increased, then the screening speed is increased, an additional power source is not needed, the cost is saved, and therefore the practicability of the screening mechanism for processing the high-purity fused quartz is improved.

The utility model provides an antenna assembly and electronic equipment. The antenna assembly comprises a circuit board; the interference module is arranged on the circuit board; an antenna radiation structure, wherein the antenna radiation structure and the interference module are arranged at an interval; and a cooling fin, wherein the cooling fin is arranged opposite to the circuit board. The radiating fin covers the interference module and extends towards the antenna radiation structure; the radiating fin is provided with an open groove, the open groove at least penetrates through the conductive base layer of the radiating fin in the thickness direction of the radiating fin, and the open groove is located between the interference module and the antenna radiation structure. The utility model aims to solve the technical problem of antenna receiving interference caused by arrangement of cooling fins in the prior art.

The application discloses a kind of building energy consumption regulation and control optimization method, system, terminal and medium, it is related to energy consumption regulation and control technical field, its technical scheme main point is: obtaining the output fluctuation data of generator set and the power load fluctuation data of target building;Determine the upper limit value and lower limit value of power load of target building at corresponding target time;Determine the dispatching optimization interval of target building at corresponding time;With the sum of all target buildings control optimization value minimum as optimization goal to establish control optimization model;Solving obtains the energy consumption regulation and control strategy of each target building.The application uses power load control, both considers the fluctuation trend brought by the randomness and uncertainty of new energy in power system in generation side, also considers the demand change trend of each building in power consumption side, can realize the balanced distribution of each building energy consumption under the demand intensity of each building with small error.

The invention discloses a critical nursing turning device, which relates to the technical field of nursing, and comprises a frame bed body, a mounting plate is fixedly connected below the frame bed body, a turning auxiliary supporting mechanism is arranged outside the mounting plate, the turning auxiliary supporting mechanism comprises a hydraulic cylinder arranged outside the mounting plate, and a moving block is arranged at the output end of the hydraulic cylinder. A base plate is slidably connected below the moving block, a first gear is rotatably connected to the side edge of the moving block, a second short toothed plate is engaged with the upper portion of the first gear, a first moving plate is fixedly connected to the side, away from the first gear, of the second short toothed plate, and a second gear is rotatably connected to the side, away from the second short toothed plate, of the first moving plate; the turning-over plate and the protection plate ascend and descend synchronously, the patient is effectively prevented from sliding laterally or colliding with a bedside guardrail in the turning-over process, the risk of secondary injury is reduced, the turning-over plate is particularly suitable for coma and unmatched patients, the safety of turning-over operation is improved, and the stooping amplitude and frequency of nursing personnel are reduced.

This invention belongs to the field of integrated circuit equipment technology and discloses a high-damping vibration-damping base for integrated circuits, including a lower base. The integrated circuit equipment is placed inside the upper base and is centered and clamped by four first flexible square rings in the clamping assembly. When the integrated circuit equipment is used and subjected to vibration during operation, the upper base vibrates. The force on the upper base is transmitted to the second block, the second spherical rod, the elastic damper, the first spherical rod, and the first block, causing the elastic damper to extend and retract, thus mitigating the impact force generated during vibration. Since the multiple second spherical rods and the first spherical rods can move in a circular motion around the second block and the first block, when the integrated circuit equipment vibrates irregularly, the impact force generated in multiple directions of movement of the integrated circuit equipment can be mitigated, reducing the vibration frequency of the upper base relative to the lower base.

The electric machine system includes an electric machine having a rotor and a coil; the power converter that outputs an output current to the coil of the electric machine; and a controller that controls the power converter. The controller includes a signal output unit that outputs a signal for controlling a mode of the output current to the power converter; and an abnormality detection unit that receives an abnormality signal indicating an abnormal situation in a case of the abnormal situation in which the generation of the fault current generated in the coil by the rotation of the rotor should be suppressed. The signal output unit outputs a demagnetization control signal to the power converter when the abnormality detection unit receives the abnormality signal. The power converter causes a demagnetization current for a demagnetization magnetic flux that demagnetizes the permanent magnet of the rotor to flow through the coil in response to an input of the demagnetization control signal.

The invention discloses a clamp and a machine tool, and relates to the technical field of clamps. The clamp comprises a supporting assembly and a tensioning assembly, a supporting part of the supporting assembly is used for supporting a workpiece, and a tensioning part of the tensioning assembly protrudes out of the supporting part and penetrates through a center hole of the workpiece. Due to the fact that the multiple protruding parts are arranged on the side wall of the tensioning part and the concave parts are formed among the multiple protruding parts, when the workpiece needs to be clamped, the tensioning part drives the protruding parts to move in the direction away from the central axis of the tensioning part, the protruding parts can abut against the first hole section of the central hole, and the position of the workpiece in the radial direction can be effectively limited. And the concave part and the second hole section of the center hole are arranged at an interval, so that the concave part cannot transmit the pressure generated by the tensioning part to the workpiece, the protruding amplitude of the outer wall of the workpiece can be reduced, and the machining precision of the workpiece is improved.

The gearbox combined type bearing comprises an outer ring and a clamping ring which is used for being arranged on the outer ring in a sleeving mode after being heated through a heating technology, and a containing groove is formed in the peripheral wall of the outer ring in the circumferential direction; a boss which is used for being close to an opening of the containing groove after being heated through a heating process and being pressed into the containing groove through external pressure equipment when the clamping ring is cooled is annularly arranged on the inner circumferential wall of the clamping ring, and a first limiting structure used for limiting the boss to be separated from the containing groove is arranged on the right side of the containing groove. The left side of the containing groove is provided with a second limiting structure used for limiting the boss from being separated from the containing groove. The problems that when a traditional clamping ring and a bearing outer ring are assembled, manual assembling is needed, the assembling precision is low, the assembling efficiency is poor, and the clamping ring and the bearing outer ring are prone to being separated are solved.

The invention is a kind of wind farm droop control frequency modulation method with pitch angle protection function, wind farm control center receives the load shedding mode and adjustable power of wind turbine; the wind turbine is divided into two groups by whether to use pitch angle load shedding, and the total frequency modulation power of the wind farm and the two groups is calculated according to the calculation; the control center determines the total droop coefficient of the wind farm according to the total adjustable power of the wind farm; the total droop coefficient of the two groups is determined according to the adjustable power of the two groups, and the relationship between the frequency modulation participation rate ρ and σ and the maximum adjustable frequency modulation power of G1, G2 and the maximum adjustable frequency modulation power of the wind farm is calculated; the droop coefficient of the wind turbine is determined according to the adjustable power of the wind turbine, and it is sent to each wind turbine; finally, the wind turbine adjusts the droop coefficient in real time according to the received information, and completes the frequency modulation work. The invention preferentially makes the wind turbine without pitch angle load shedding to perform frequency modulation, reduces the pitch angle action amplitude and frequency of the wind turbine with pitch angle load shedding, protects the mechanical device of the wind turbine, and prolongs the service life of the wind turbine.

The invention discloses a wood veneer treatment system and a wood veneer treatment method. The system comprises a carbonization furnace used for heating and carbonizing wood veneers; the belt conveyor is used for conveying carbonized veneers; the first spraying device is arranged at the first station and used for spraying chemicals to the veneers located on the surface of the belt conveyor; the first drying device is arranged at the second station and is used for drying the medicament on the surface of the veneer; the turn-over mechanism is arranged at the third station and used for picking up the veneers conveyed from the second station, turning over the veneers and placing the veneers on a belt conveyor so as to convey the veneers to a fourth station; the second spraying device is arranged at the fourth station and used for spraying chemicals to the veneers conveyed from the third station; and the second drying device is arranged at the fifth station and used for drying the medicament on the surface of the veneer conveyed by the fourth station. When the system is used and combined with the method for processing the wood veneer, various attributes of the wood veneer can be effectively improved.

The invention discloses a semiconductor laser with a lower waveguide layer for suppressing heat fading, which sequentially comprises a substrate, a lower coating layer, a lower waveguide layer, an active layer, an upper waveguide layer, an electron blocking layer and an upper coating layer from bottom to top, the waveguide layer under the low oscillation threshold is any one or any combination of an InGaN / GaN superlattice, an InGaN / AlGaN superlattice, an InGaN / AlInGaN superlattice, an InGaN / AlInN superlattice, a GaN / AlGaN superlattice, a GaN / AlInGaN superlattice and a GaN / AlN superlattice, and the thickness of the waveguide layer under the low oscillation threshold is 5-1000 nm. The waveguide side wall scattering loss and quantum well absorption loss of the laser are reduced, the internal light absorption loss of the laser is reduced, heat fading caused by non-radiative recombination is inhibited, the threshold current of the laser is reduced, and the slope efficiency is improved.