233results about How to "Realize dynamic adjustment" patented technology

The invention provides a wooden door three-dimensional model parameterization design and numerical control code generation method and system, and relates to the technical field of woodworking numerical control machining and computer vision. A multispectral imaging technology is adopted at a raw material feeding station to obtain a wood board surface multiband image, and a high-definition wood characteristic spectrum is generated through algorithm processing; establishing a mapping rule base of the atlas and numerical control parameters in combination with historical data; the map and the three-dimensional embossment model are superposed, and a tool path and cutting parameters are adaptively adjusted according to texture features to avoid defects and optimize along grains; and finally, numerical control codes matched with wood characteristics are generated, the rotating speed of the main shaft is adjusted according to the hardness, a numerical control machine tool is driven to complete high-precision wooden door machining, and precise numerical control machining based on wood surface characteristic intelligent recognition and self-adaptive adjustment can be achieved.

The utility model discloses a low-altitude aircraft which comprises an aircraft body, four fixed machine arm rods are arranged in the cross direction of the aircraft body, the surfaces of the fixed machine arm rods are movably connected with movable machine arm rods, one sides of the movable machine arm rods are provided with locking pieces, and the other sides of the movable machine arm rods are connected with the locking pieces. The locking piece comprises fixing frames fixed to the top and the bottom of one end of the movable machine arm rod, a connecting plate is arranged on one side of each fixing frame, and a clamping column is fixedly connected to the inner side of each connecting plate. The fixed machine arm rod can move in the inner cavity of the movable machine arm rod, so that the total length of the fixed machine arm rod and the movable machine arm rod can be changed, the length of the machine arm can be adjusted, the two clamping columns enter the through holes, the adjusted length can be locked, the length of the machine arm can be adjusted according to task requirements, and the machine arm is convenient to use. The aircraft arm is suitable for different terrains and weather conditions, dynamic adjustment of the arm of force of the propeller is achieved, lift and thrust efficiency is optimized, and the fixed aircraft arm rod and the movable aircraft arm rod can be rapidly detached and replaced.

The present application relates to the technical field of power distribution control, and particularly relates to a power intelligent dynamic distribution method for a skid steer loader based on multi-working condition identification. The method comprises the following steps: performing skid steer loader multi-modal operation characteristic analysis on power states of skid steer loader multi-source operation data to generate skid steer loader multi-modal operation characteristic data; performing skid steer loader working condition characteristic analysis on the skid steer loader multi-modal operation characteristic data to generate skid steer loader working condition characteristic data; performing power demand characteristic analysis on working condition dynamic change trends based on skid steer loader real-time operation data and the skid steer loader working condition characteristic data to generate working condition dynamic change trend power demand characteristic data; and performing skid steer loader power distribution and dynamic optimization processing based on the working condition dynamic change trend power demand characteristic data to generate skid steer loader power distribution dynamic optimization data. The present application realizes efficient and energy-saving intelligent distribution of power under multi-working conditions of a skid steer loader.

The application relates to a dynamic grid coordinate generation method, system, computer equipment and storage medium, and the technical scheme points are as follows: receiving window space coordinates of multiple vertices, inversely transforming the window space coordinates of the vertices into corresponding world space coordinates; generating a primitive using the window space coordinates of all the vertices; performing primitive assembly and primitive rasterization on the primitive to determine target pixel points; performing interpolation calculation on the primitive after the primitive rasterization according to the world space coordinates of the vertices to obtain the world space coordinates of the target pixel points; determining a scaling ratio of the world space coordinates of the vertices and the corresponding window space coordinates according to the inverse transformation, and determining a scale according to the scaling ratio; determining to-be-colored pixel points according to the scale, a preset grid line width and the world space coordinates of the target pixel points, coloring the to-be-colored pixel points to obtain a grid; and the application has the effect of dynamically adjusting the grid scale and better display effect.

The application belongs to the field of robots, relates to a data analysis technique, and aims to solve the problem that the existing intelligent control system for robot moving route cannot timely adjust the planned route of the robot according to the obstacle analysis result, in particular to an intelligent control system for robot moving route based on the Internet of Things, which comprises an intelligent control platform, wherein the intelligent control platform is communicatively connected with a dynamic planning module, a decision analysis module, an environment evaluation module, a route optimization module and a storage module; the starting position and the target position of the robot are acquired, all static planning routes between the starting position and the target position are acquired, a plurality of sub-nodes are set on the static planning routes, and the static planning route with the shortest path distance value is marked as a preliminary selected route; the application can plan and analyze the moving route of the robot in a dynamic environment, and obstacle analysis is performed on each sub-node to realize dynamic adjustment of the moving route of the robot.

The invention provides an oil-gas pump all-in-one machine and a vehicle, and the oil-gas pump all-in-one machine comprises a driving motor which is provided with a driving shaft with two output ends; the steering oil pump is connected with a shell of the driving motor, and an input shaft of the steering oil pump is connected with the first end of the driving shaft; an input shaft of the air compressor is connected with the second end of the driving shaft through an electromagnetic clutch; the pressure sensor is connected with the steering oil pump, and the pressure sensor is used for detecting the pressure of an oil outlet of the steering oil pump; the controller is connected with a shell of the driving motor, the controller is electrically connected with the driving motor, the pressure sensor and the electromagnetic clutch, the controller is used for regulating and controlling the rotating speed of the driving motor according to the pressure of the oil outlet, and the controller is further used for controlling combination and separation of the electromagnetic clutch. According to the scheme, dynamic adjustment of the oil pressure of the steering oil pump is achieved, and the technical problem that dynamic control over the oil pressure of the steering oil pump cannot be achieved in the prior art is solved.

The utility model belongs to mould processing fixed technology field, concretely is a kind of multifunctional freeze-proof valve, the utility can efficiently attenuate water hammer force and realize dynamic regulation, through the fluid inertia impact force of buffer airbag deformation absorption when valve opening and closing, cooperate with the pressure regulating structure of adjusting rod, threaded plate and adjusting spring, can according to fluid pressure, flow accurate adjustment buffering degree, avoid valve body and pipeline due to long-term water hammer effect damage, prolong equipment service life, the utility has automatic freeze-proof protection function, when liquid in valve body freezes and expands, freeze-proof airbag is pressed and pushes airtight rod to move, make telescopic sleeve expand and open adjusting hole, through the gas circulation of buffer airbag and adjusting airbag and reserve expansion space, without additional energy consumption or manual operation can prevent valve body cracking, adapt to cold region and unattended scene, improve the safety and applicability of valve in complex environment.

The application provides a pixel circuit, a display panel and a display device. The pixel circuit comprises a control circuit and at least one processing circuit. The processing circuit can send a first indication signal and a selection signal to at least one pixel circuit. The processing circuit can buffer the first indication signal to obtain a second indication signal by using the driving capability corresponding to the selection signal. The application realizes dynamic adjustment of the front-end digital signal of the pixel circuit. The application enriches the adjustment mode of the driving capability of the indication signal of the pixel circuit, so that the pixel circuit can more effectively adjust the driving capability of the indication signal, and the pixel circuit can more accurately drive the light-emitting device to emit light according to the indication signal.

The invention discloses an ammonia gas catalytic cracker. The cracker comprises a shell and a corrugated coil pipe in the shell, a separation blind plate is arranged in the shell and is parallel to the bottom surface, and the internal space is divided into an upper half area and a lower half area; the corrugated coil pipe repeatedly penetrates through the separation blind plate; the pipe section, located above the separation blind plate, of the corrugated coil pipe is filled with an ammonia catalytic cracking catalyst, and the pipe section, located below the separation blind plate, of the corrugated coil pipe is not filled; an air inlet and an air outlet are formed in the two sides of the upper half area of the shell respectively, and a flue gas inlet and a flue gas outlet are formed in the two sides of the lower half area of the shell respectively; wherein the air inlet and the flue gas outlet are on the same side, and the air outlet and the flue gas inlet are on the same side; an inlet of the corrugated coil is connected with an ammonia pipeline, and an outlet is connected with a cracking gas pipeline. Part of ammonia gas is pre-cracked by utilizing the ammonia gas cracking catalyst, and heat is provided for cracking reaction in the corrugated coil pipe by utilizing flue gas waste heat, so that the adjustment of the combustion property of fuel gas is realized, and the possibility is provided for reducing fuel type NOx.

The invention discloses an electrolytic copper plate defect detection method and system based on a computer vision technology, and relates to the technical field of image processing, the system is composed of a plurality of functional modules, and the system comprises a self-adaptive image acquisition module for acquiring three-dimensional undulating form data and 2D images of a copper plate, and adopting a top-hat transformation algorithm to obtain a three-dimensional undulating form of the copper plate; dynamically adjusting the size of structural elements in the 2D image based on the three-dimensional fluctuation form data to obtain a standard image; the defect segmentation module is used for carrying out gray processing on illumination reflection differences of different areas on the surface of the copper plate based on the three-dimensional fluctuation form data to obtain gray values, mapping the gray values of the different areas to a unified standard interval, and carrying out defect image extraction on the standard image by adopting a 3D feature enhancement and dynamic threshold segmentation strategy; the feature fusion recognition module is used for extracting geometric features and texture features from the three-dimensional fluctuation form data and the 2D image, and splicing the geometric features and the texture features with the defect image to form an initial feature vector;

This application relates to the field of exoskeleton technology, disclosing a leg support structure and an exoskeleton device. The leg support structure includes a first leg support and a second leg support forming a ring structure. The first leg support includes a support frame and a flexible binding member. The flexible binding member is disposed on the inner side of the support frame facing the second leg support and is used to contact the user's leg. One end of the flexible binding member is fixed relative to the support frame, and the other end of the flexible binding member is adjustablely fixed to the support frame via an adjustment component. The adjustment component is also connected between the first and second leg supports to adjust the circumferential dimension of the ring structure. The distance between the other end of the flexible binding member and the side of the second leg support connected to the adjustment component, and the change in the circumferential dimension of the ring structure achieved by the adjustment component, are positively correlated. This leg support structure can simultaneously achieve its own size adjustment and the fit adjustment of the flexible binding member, thereby improving the user's wearing experience.

The utility model relates to the technical field of mine hoisting, in particular to an eccentric gear clearance adjustable encoder device for a mine hoist, which comprises an end cover, a mounting hole is arranged on the end cover, and an eccentric gear component is mounted on the end cover through the mounting hole. The eccentric gear assembly comprises an eccentric bearing frame, a gear shaft I and a connecting body, the eccentric bearing frame is detachably installed on the front surface of the end cover, the connecting body and the eccentric bearing frame are installed in corresponding installation holes in the end cover, an encoder is installed on the outer side face of the connecting body, an input shaft of the encoder is connected with the shaft end of the gear shaft I, and an output shaft of the encoder is connected with the shaft end of the gear shaft II; the shaft end of the gear shaft I is installed in the eccentric bearing frame through a bearing, and the gear end of the gear shaft I is connected with a gear shaft II in an engaged mode. The encoder device solves the problems that an existing encoder device is large in gear meshing clearance due to insufficient machining precision and unstable in signal output due to the fact that the clearance is aggravated by abrasion after long-term operation, and then the control precision and safety performance of a mine hoist are affected.

The application discloses a coated controlled-release fertilizer based on magnetic response intervention nutrient precise control release and a preparation method thereof, and belongs to the technical field of controlled-release fertilizers.The coated controlled-release fertilizer is prepared by using a magnetic response type biological base coating material as a film material, and the magnetic response type biological base coating material raw material comprises, by weight, 30-40 parts of vegetable oil polyol, 15-25 parts of a curing agent, 1-5 parts of a covalent network crosslinking agent, 2-6 parts of a hydrophobic crosslinking agent and 5-20 parts of a magnetic substance.The application can artificially control the film shell pores to realize precise release of nutrients, greatly improve the nutrient utilization rate, and meanwhile, after the nutrient release is completed, the film shell remaining in the soil can be recycled by physical magnetic attraction, which is efficient and environmentally friendly.The application realizes magnetic response precise control of nutrient release by hydrophobic modification, crosslinking degree enhancement technology and introduction of magnetic substances, can artificially intervene in dynamic matching of crop fertilizer requirement rules with the help of an external magnetic field, realizes efficient recycling of the film shell, and eliminates soil plastic residue pollution from the source.

This invention discloses a power limiting device for a terminal device, comprising: multiple current limiting adjustment units connected in series between the load and a sampling unit; each current limiting adjustment unit includes a current limiting MOSFET and a first comparator circuit, the first comparator circuit including an operational amplifier, a first voltage divider network, and a second voltage divider network; the first voltage divider network is connected to the power input terminal and the inverting input terminal of the operational amplifier; the second voltage divider network is connected to a reference voltage source, the sampling unit, and the non-inverting input terminal of the operational amplifier; the output terminal of the operational amplifier is connected to the control terminal of the current limiting MOSFET; the operational amplifier is configured to drive the current limiting MOSFET to operate in the ohmic region when the voltage at the non-inverting input terminal is less than the voltage at the inverting input terminal, so as to continuously adjust the total current of the main circuit to the current limiting threshold; wherein, the current limiting threshold decreases as the voltage at the power input terminal increases; this device achieves input voltage feedforward constant power limiting through low-cost discrete components, effectively solving the energy limiting problem under wide voltage supply conditions.

The application discloses an optical power collection device and method, relates to the technical field of optical signal detection, and comprises the following: a photoelectric detector for converting an optical signal into a current signal; a transimpedance amplifier for converting the current signal into a pulse voltage signal; a peak detector for detecting the peak value of the pulse voltage signal; an RC filter network for filtering noise of the pulse voltage signal; a low-frequency amplifier for amplifying the low-frequency pulse voltage signal; an ADC collection module for converting the amplified pulse voltage signal into a digital signal; a first feedback network for adjusting the gain of the transimpedance amplifier; a second feedback network for adjusting the gain of the low-frequency amplifier; and a microcontroller for controlling the first feedback network to adjust the gain of the transimpedance amplifier according to the peak value of the pulse voltage signal and for controlling the second feedback network to adjust the gain of the low-frequency amplifier according to the digital signal.

The invention discloses a temperature control device and method of a semiconductor cooler and a laser device. The temperature control device of the semiconductor cooler comprises a semiconductor cooler driving circuit, a temperature control circuit and a temperature control circuit, wherein a driving signal output end of the semiconductor cooler driving circuit is connected with the semiconductor cooler; the output end of the temperature adjusting circuit is connected with the semiconductor cooler driving circuit, and the temperature adjusting circuit is used for sending an adjusting signal to the semiconductor cooler driving circuit according to the temperature of the semiconductor cooler. In this way, the laser temperature control effect can be improved.

This application discloses an elevator scheduling method, elevator scheduling device, and electronic device, belonging to the field of Internet of Things (IoT) technology. The method includes: receiving a scheduling request sent by the elevator terminal, the scheduling request including historical elevator weights and elevator terminal operating status information, the operating status information including user waiting information for each floor corresponding to the elevator terminal, and the historical elevator weights indicating the priority of each floor's stopping order during the last elevator scheduling; determining a target elevator weight for each floor based on the operating status information and historical elevator weights, the target elevator weight indicating the priority of the elevator terminal's stopping order on each floor; and generating scheduling information corresponding to the scheduling request based on the target elevator weights. By comprehensively processing the current operating status of the elevator terminal and the priority of each floor during the last elevator scheduling, the final scheduling information is obtained, realizing dynamic adjustment of the scheduling information.

The application relates to the technical field of Internet, and discloses an interface calling timeout processing method, device, equipment and storage medium. The method comprises the following steps: acquiring an interface calling request, monitoring and recording a first calling time of a thread interface processing the interface calling request in real time; when it is monitored that the first calling time exceeds a preset timeout time, marking the corresponding thread interface as a timeout interface; acquiring a second calling time of the timeout interface within a first preset time range, acquiring a shortest calling time from the second calling time, comparing the shortest calling time with the preset timeout time; if the shortest calling time is greater than the preset timeout time, marking the timeout interface as a long-time-consuming interface, calculating an average time consumption of the timeout interface processing the interface calling request within the first preset time range according to the second calling time, and adjusting the timeout time of the long-time-consuming interface according to the average time consumption. Through the above method, the timeout time can be dynamically adjusted, and the user experience is improved.

The utility model relates to the technical field of solar storage battery temperature control, in particular to a solar storage battery sensing temperature control self-heating system which comprises a protection box, a heating load module is arranged in the protection box, a storage battery is placed in the heating load module, and the storage battery is arranged in the protection box. A pulse generation and control module electrically connected with the heating load module is arranged at one end of the outer side wall of the protection box, and a temperature collection and feedback module is arranged in the middle of the side wall of the heating load module. The pulse generation and control module is combined with the PWM controller, so that the dynamic adjustment of the pulse frequency and the duty ratio is realized, the heating power can be accurately controlled according to the real-time temperature feedback, the energy consumption is obviously reduced, and the system adaptability is improved; a grid frame structure consisting of transverse and longitudinal PTC heating sheets is adopted, and a silica gel heat diffusion layer (the heat conductivity coefficient is greater than or equal to 3W / m.K) is combined, so that rapid and uniform transfer of heat is ensured.

This invention discloses a method and apparatus for active discharge of a DC bus. The method includes: acquiring the bus voltage signal of the DC bus in the y-th sampling period and calculating the actual discharge energy of the DC bus in the y-th sampling period; dynamically adjusting the reference discharge energy based on the actual discharge energy of the DC bus and the target total discharge time; and dynamically adjusting the d-axis current in the (y+1)-th sampling period based on the actual discharge energy of the DC bus in the y-th sampling period and the reference discharge energy. In this invention, the target total discharge time is preset, making the discharge duration of the DC bus controllable and eliminating the need for manual calibration, thus achieving the effect of reducing the bus voltage to a safe threshold within a specified time. Based on the closed-loop feedback of the actual discharge energy and the dynamic adjustment of the reference discharge energy, the d-axis current is dynamically adjusted, thereby achieving dynamic adjustment of the actual discharge energy in each sampling period and improving discharge safety.

The invention belongs to the technical field of smart city information, and particularly relates to a multi-scene adaptive communication protocol software system and an optimization method. And the whole process of communication protocol adaptation, data transmission and abnormity management and control is covered. Core algorithms such as protocol adaptation modeling, data transmission optimization and abnormal management and control early warning are adopted, the technical bottlenecks of'heavy transmission and light adaptation, heavy rate and light reliability, and heavy response and light pre-judgment 'of a traditional communication protocol software system are broken through, and adaptive adaptation, high-reliability and low-delay data transmission and full-process abnormal real-time management and control of communication protocols under multiple scenes are achieved. The adaptability, reliability and stability of a communication protocol software system are remarkably improved, deep fusion of communication protocol software and multi-scene application is promoted, and a brand new intelligent communication solution is provided for the fields of industrial communication, the Internet of Things, intelligent terminals and the like.

The invention discloses a wafer self-adaptive grabbing system and method based on dynamic force feedback, and belongs to the technical field of semiconductor material processing and carrying. According to the system, an edge-lower support fusion type clamping jaw structure is adopted, a micro MEMS pressure sensor array is integrated, and sub-Newton level force control precision is achieved through a double-closed-loop PID control algorithm. The system comprises a miniature force sensor integration module, a dynamic force feedback control module and an edge-lower support fusion type clamping jaw structure, and can effectively solve the problems of stress concentration, temperature deformation and the like in the ultrathin wafer carrying process. The control method disclosed by the invention is combined with a working condition self-adaptive adjustment strategy, supports modes of sensitive edge protection, pressure balance, high-speed stability and the like, can switch working modes in real time according to wafer states and environmental conditions, dynamically adjusts operation parameters, and provides a solution for precise carrying of third-generation semiconductor ultrathin materials.

This application discloses a network cable connection testing system and method for a server, relating to the computer field. The system includes: a server for sending control signals to an optical path switcher and electrical signals to optical-like modules, wherein the control signals are used to adjust the interconnection relationship of multiple server optical ports, and the electrical signals are used to perform network cable connection testing on the server; multiple optical-like modules physically connected to multiple server optical ports, used to receive electrical signals and convert them into optical signals, wherein the multiple optical-like modules are connected one-to-one with the multiple server optical ports; and an optical path switcher connected to the multiple optical-like modules via optical fibers and physically connected to the server, used to respond to the control signals and perform network cable connection testing on the server based on the adjusted interconnection relationship of the multiple server optical ports and the optical signals, wherein the optical fibers are used to transmit the optical signals.

The invention provides photovoltaic energy storage equipment which comprises a base, a telescopic frame arranged in the base and a main board connected with the telescopic frame. The auxiliary plate is arranged on the surface of the main plate and is unfolded along with rotation of the main plate, a fourth connecting rod is arranged on the surface of the auxiliary plate and the surface of the main plate, a connecting rod is connected to the surface of the fourth connecting rod, one end of the fourth connecting rod is connected with the telescopic frame, and when the base drives the telescopic frame to move, the angle of the main plate is changed, and the auxiliary plate is driven to be unfolded relative to the main plate. The dynamic adjustment of the photovoltaic acquisition area is realized, and when the illumination is sufficient, the auxiliary plate can be automatically unfolded, so that the total light receiving area is greatly increased; in severe weather or transportation, the auxiliary plate is folded on the surface of the main plate, the windward area and space occupation are effectively reduced, the balance between the power generation efficiency and the structural safety is realized, a back-mounted connecting rod scheme is adopted, all stress connecting rods and motion fulcrums are hidden on the backlight surface of the photovoltaic panel, the absolute cleanness of the light receiving surface is ensured, and the service life of the photovoltaic panel is prolonged. And the power generation efficiency of the photovoltaic panel is improved.

The utility model discloses a miniature pesticide spraying device for pest control. The miniature pesticide spraying device comprises a pesticide box, a mounting plate and a pesticide spraying assembly, the pesticide box is mounted on the mounting plate, a pesticide outlet is formed in the bottom, one or more pesticide inlets are formed in the top, and a pesticide inlet cover covers the pesticide box and is used for storing pesticide liquid; the mounting plate is of a rigid structure and is used for mounting the medicine box to an automatic machine; the pesticide spraying assembly is detachably connected with a pesticide outlet in the bottom of the pesticide box and used for spraying pesticide liquid. Moreover, the pesticide spraying assembly comprises an angle adjusting mechanism which is used for adjusting the horizontal direction of pesticide liquid sprayed by the pesticide spraying assembly. The device is simple in structure, capable of being compatible with various automatic machines, high in pest control efficiency and capable of working continuously.

The application discloses a kind of energy management methods based on data rule mining, it is related to train energy management method technical field, and its technical solution points are: the application proposes a kind of ground type energy storage system energy management method based on data rule mining, according to the working condition identification method based on K-means clustering algorithm, the overall working condition of train in power supply section can be accurately identified, and by working condition identification result realizes the dynamic adjustment of energy storage system charge-discharge voltage threshold value.Compared with the traditional fixed threshold or energy management method based on no-load voltage identification, the method can effectively absorb the residual regenerative braking energy of train, and fully utilize the absorbed regenerative braking energy in traction working condition, reduce the output energy of substation to achieve the goal of energy saving and consumption reduction.

The invention discloses an agricultural enterprise credit scoring method and device, and a medium, and relates to the technical field of credit risk assessment. The method comprises the following steps: acquiring multi-source heterogeneous data of an enterprise; based on the historical price data of the agricultural product, determining the current price cycle phase of the agricultural product; obtaining a weight corresponding to the operating characteristic in the price cycle phase from the characteristic weight matrix; and inputting the basic credit features, the operation features and the weights into a credit scoring model to obtain the credit score of the enterprise output by the credit scoring model. Through the mode, the problems of risk identification lagging and insufficient response to periodic market fluctuation of an existing method can be solved.

The invention relates to the technical field of building demolition construction, and discloses a supporting air bag and a building demolition construction method.The supporting air bag is suitable for a building demolition process and comprises a plurality of air bag units which can be arranged between a demolition building and a protection building, and the air bag units are distributed in an array mode; the airbag unit includes: a body; a compensation module, an air bag body, a pressure detection piece and an inflation module; according to the supporting air bag, through cooperative adjustment of the inflation module and the compensation module, the settlement trend of the protection structure in the dismantling process can be effectively restrained, adjacent protection buildings are prevented from being damaged due to failure of the supporting structure, and the safety of overall construction is improved.

The utility model discloses provide an audio signal limiting circuit, include: at least one way limiting branch, any limiting branch includes: gain module is used for receiving audio signal, and carries out amplification processing to audio signal, generates audio amplification signal and exports, conversion module is used for converting the voltage type of audio amplification signal, obtains audio conversion signal, comparison module is used for according to the size between the voltage of audio conversion signal and threshold voltage, and output comparison signal, and comparison signal has first state and second state, limiting module is coupled with comparison module and gain module respectively, when comparison signal has first state, is in the gating state, and the passage between gain module and limiting module is gated to access limiting resistance, and when comparison signal has second state, is in the off state, and the passage between gain module and limiting module is disconnected to disconnect limiting resistance. Adopt above -mentioned technical scheme, can effectively limit the amplitude of audio amplification signal.