107results about How to "Realize a realistic simulation" patented technology

The invention discloses a user power consumption load identification intelligent electric energy meter automatic detection method based on a standard power source. In the automatic detection method, an upper computer controls a standard power source to output a household appliance load curve, the upper computer compares the intelligent electric energy meter identification results with an output electric appliance type of the standard power source, electric appliance start and stop time and standard power, and the identification accuracy of a detected user power consumption load identificationintelligent electric energy meter is obtained. The automatic detection method can simulate two working environments of a simple working condition and a complex working condition of the user power consumption load identification intelligent electric energy meter. The automatic detection method sets the output sequence of different electric appliances through the upper computer, and synchronous or asynchronous output of load characteristics of multiple electric appliances can be realized. The upper computer automatically controls output of the electric appliance through an interface, automatic detection on the user power consumption load identification intelligent electric energy meter in a home power consumption environment can be realized and simulated, and the application prospect is wide.

The invention discloses a construction method and a construction device of a wireless sensor network interaction deployment platform. According to the construction method and the construction device of the wireless sensor network interaction deployment platform, the deployment and the design of a wireless sensor network are digitalized, firstly a virtual environment is built through a digital modeling mode, then modeling is conducted to different types of nodes such as wireless sensors and routers, further, an interaction design approach based on multi-point touch control is offered to a user, in the period, a designer can use certain mature algorithms or conduct manual deployment, and the connectivity of the wireless sensor network and the coverage of the wireless sensor network are verified in real time in a deployment process. The construction method and the construction device of the wireless sensor network interaction deployment platform can be directly used for various occasions which need to be built with wireless sensor networks and include environment monitoring and biological monitoring, intelligent factories, intelligent communities, and the like.

The invention discloses an indoor simulation device for the migration and the conversion of pollutant in an artificial shore zone. According to the invention, in the lateral supply direction of a three-dimensional seepage groove, ground water is supplied on one side where a stream flows to simulate the boundary condition of the groundwater flow in a field zone; reasonably proportioned solution is supplied on the other side to simulate the seawater in a coastal zone; and interaction of salt water and fresh water realizes real simulation of seawater and terrestrial water. By adopting the device provided by the invention, the physical simulation of the artificial shore zone is simulated to the greatest extend, a large-scale artificial coastal zone is downsized to a small-scale indoor physical simulation device under the guidance of a geometric similarity theory, the comprehensive influences of adjustable water level height, saltwater and fresh water interaction, waves, rainfall and external contamination are comprehensively considered, the real simulation of the artificial coastal zone is ensured, and a foundation is laid for the numerical simulation of the artificial coastal zone and the late pollution abatement.

The invention relates to an animal external ear sound characteristic simulator. The animal external ear sound characteristic simulator comprises a signal transmitter, an external ear movement device and a control device, wherein the signal transmitter is used for generating a sound wave signal; the external ear movement device comprises a first traction mechanism, a second traction mechanism and a simulated external ear facing the signal transmitter; the simulated external ear is used for receiving sound waves from the signal transmitter; the first traction mechanism is connected with the ear tip of the simulated external ear and is used for controlling the ear tip of the external ear to move; the second traction mechanism is connected with the middle part of the simulated external ear and is used for controlling the middle part of the external ear to move; a sound wave detector is installed at the root part of the simulated external ear, and is used for measuring sound wave frequencies received by the simulated external ear; and the control device comprises a first traction controller, a second traction controller and a modulation controller.

The invention discloses a rain simulating device for lab, which includes bracket, water pump, water converter, and water transmission channel, and valve, sprayer and control device. One inlet and several outlets are arranged on the water converter, the pump is connected with the inlet of the water converter, each inlet of the water converter is connected to the sprayer through valve, transmitting channel. The sprayer is arranged on the bracket through transmitting channel. The device controls the valve to act. The invention uses pump to press, and transmits them to each sprayer through water converter, controls the open quantity, size and spraying time of sprayers through the control device, it can realize real simulation to the natural rain, it has characters of small error, automatic control, wireless remote control.

The invention relates to an improved endoscope simulation device, belonging to the field of analogue simulation exercise equipment of surgical instruments. The technical scheme is that: the improved endoscope simulation device comprises a bracket, a ball body and a control rod, wherein the ball body is installed in the bracket in a free rotation mode; at least two orientation sensors are arranged between the inner side of the bracket and the ball body; one end of the control rod is fixed on the diameter direction of the ball body to control the ball body to rotate; a handle sleeve is sleeved on the other end of the control rod and rotates and slides relative to the control rod;; the inner cavity of the handle cover and the cross section of the control rod are round; a depth sensor and an rotation angle sensor are arranged between the control rod and the handle sleeve; an arc-shaped sliding rod sharing the center with the ball body is inserted on the position between the ball body and the handle sleeve in a relative sliding mode; and two ends of the arc-shaped sliding rod are in through connection on the bracket. In the invention, the defect of the prior art is effectively overcome through the artful design of the handle sleeve and the arc-shaped sliding rod, various actions of tools can be precisely simulated, and the sensor is used for precise measurement. The improved endoscope simulation device has the advantages of simple structure and high simulation degree.

The invention relates to a supersonic engine test stand, which comprises a supply source, a temperature simulation unit, a simulation chamber, a supersonic nozzle and an exhaust ejector, wherein the supply source includes a fuel supply source, an oxygen supply source, an engine intake air supply source, an alcohol supply source and an ejector active air flow supply source; the temperature simulation unit includes a pipe body and a shell, the pipe body is located inside the shell and internally provided with a first medium channel, and the space between the outer wall of the pipe body and the inner wall of the shell forms a second medium channel; a tested engine is located in the simulation chamber; and the supersonic nozzle includes an inlet equal-straightness section, a subsonic convergence section, an initial supersonic expansion section and a supersonic expansion section which are coaxially and fixedly connected in sequence. The supersonic engine test stand is provided with a Lavalsupersonic nozzle between the temperature simulation unit and an air inlet of the engine, and realizes the simulation for the air inlet state of a supersonic engine during a supersonic engine and engine ground test.

The invention discloses an experimental device used for evaluation of water stability of a bituminous mixture and an experimental method. The experimental device comprises dynamic load loading equipment, a working box, an indirect tensile test device, a temperature control device and fixed equipment. The experimental device can simulate an external environment of the bituminous mixture in the practical use condition. By adopting a method of conducting an indirect tensile fatigue test in the experimental device, the evaluation of water stability performance of the bituminous mixture under multi-field coupling of stress field, temperature field, waterpower field and dynamic change is achieved, and a fatigue life is used to evaluate the water stability performance of the bituminous mixture in different use environments. The experimental device and the experimental method can be used for studying the water stability performance of the bituminous mixture in the practical use environment, and have very good evaluating effectiveness.

The present invention relates to a wired testing method of intelligent antenna DOA estimation performance. By utilizing a vector direction diagram of an antenna, the response of an intelligent antenna to a direction of arrival (DOA) is expressed as normalized amplitude and phase distribution of array unit output, the normalized amplitude and phase distribution is realized by using a real amplitude adjuster and a real phase regulator, the amplitude adjuster and the phase regulator with realization of the normalized amplitude and phase distribution are inserted into an intelligent antenna system, the real simulation of the direction of arrival is realized, and DOA estimation performance (including direction of arrival estimation, beam reinforcement or zeroing performance) of the intelligent antenna is determined through a wired test. According to the testing method, no far field or compact range field condition is needed in testing and verification of the DOA estimation performance, requirements to a field and an environment are low, the difficulty of application is reduced, the actual performance of intelligent antenna can be reflected more truly, and the method has wide applicability and popularization and application value.

The invention discloses a two-degree-of-freedom wind tunnel virtual flight test method. The two-degree-of-freedom wind tunnel virtual flight test method comprises the following steps: step 1, preparing a wind tunnel virtual flight test; 2, releasing the pitching degree of freedom and the rolling degree of freedom of the test model; 3, executing a pitching and rolling maneuvering flight control law; 4, ending single blowing of the wind tunnel virtual flight test; and 5, executing a wind tunnel virtual flight test in a new parameter state. According to the two-degree-of-freedom wind tunnel virtual flight test method, the advantages of real simulation of a flight physical environment, high efficiency, accuracy, low cost and repeatable simulation of a large wind tunnel are fully utilized, and the wind tunnel virtual flight test method suitable for integrated evaluation and verification of pneumatic / motion / control performance of an aircraft is established; the method is an innovative method means besides existing digital modeling simulation, semi-physical simulation and flight test methods, and has important technical support significance for flight control optimization design and performance evaluation of the aircraft.

The invention relates to the technical field of aircraft testing, in particular to a complex curved surface structure extreme high-temperature thermal intensity experiment system for aerospace aircraft testing, which comprises a micro-aerobic environment control system and a multi-temperature-zone extreme high-temperature heating device arranged in the micro-aerobic environment control system and used for heating aircraft curved surface components, the loading device is arranged in the micro-aerobic environment control system and is used for applying a load to the aircraft curved part; the multi-temperature-zone extreme high-temperature heating device comprises a control connecting frame arranged in the gas sealing cabin body, a high-reflectivity heating cover arranged on the control connecting frame, a radiation heating device arranged on the inner wall of the high-reflectivity heating cover, and a cooling device arranged on the outer wall of the high-reflectivity heating cover; according to the device, the curved surface part of the aircraft can enter an extreme thermal field environment with high temperature change speed and high temperature peak value, and the thermal field change of the aircraft in a high-altitude ultrahigh-speed flight state can be really simulated.

The invention provides an air-land talk environment simulation system terminal of a full-flight simulator, and a control method thereof. The simulation system terminal comprises a processor, a first storage, a second storage, an audio module, an external data interface, and an audio channel, wherein the processor is used for generating simulated air-land talk voice data and transmitting the voice data to the audio module; the audio module is used for decoding and amplifying the voice data and outputting to the audio channel; the control method of the terminal comprises the steps of analyzing the collected flight parameter data of the full-flight simulator, querying the corresponding channel address, matching the channel address and longitude and latitude data, requesting the voice data from an air-land talk voice flow server according to the judgment result of the channel address and the current channel address, and then playing the voice data through the audio module.

The invention discloses an engine test bed which comprises an air inlet system, an engine thrust measurement rack, an exhaust pipeline, a tail gas treatment system and a simulation cabin, wherein theengine thrust measurement rack is fixedly installed in the simulation cabin; a tested engine is installed on the engine thrust measurement rack; the air inlet system communicates with the tested engine; and one end of the exhaust pipeline penetrates through the surface of a shell of the simulation cabin to be fixedly installed in the simulation cabin, and the other end of the exhaust pipeline fixedly communicates with the tail gas treatment system. According to the engine test bed, the adjustment speed of the air inlet system is high, so that the adjustment time of engine air inlet simulationof the test bed is shortened, the test cost is reduced, and energy waste is avoided. Meanwhile, the engine thrust measurement rack realizes measurement of engine thrust and is simple in structure. Inaddition, treatment of tail gas of the engine test bed is realized, so that the gas discharged from an air outlet of an alkaline spray tower meets the national pollutant emission standards.

The invention discloses a method for simulating work of a crane cable based on a game engine. The method comprises the following steps of: a, editing cable simulation relevant parameters in an off-line way; b, dynamically constructing physical models of a main cable and an auxiliary cable; and c, dynamically rendering a cable geometrical model to realize real simulation of the working state of the crane cable. Due to the adoption of the method for simulating work of the crane cable disclosed by the invention, real simulation of the working state of the crane cable can be realized, and the real-time reaction of the operation of a crane driver can be met; and the method has high expansibility, and is convenient to use. The method is based on a game engine Unity 3D; and in a platform, a most advanced graphics technology is adopted, a most popular physical engine PhysX is integrated, and the cost is low.

The invention discloses an oil well oil-gas-water three-phase gas lifting oil production process simulation device which comprises an oil-water power system, an air power system, a plurality of simulation shafts and a gas-liquid separation system, wherein the oil-water power system comprises a pure oil system, a pure water system, an oil-water mixing tank, an oil-water flow stabilizing system anda liquid flowmeter calibration device; the air power system comprises a cooling water system, an air compressor, a gas flow stabilizing system, an air heating tank and a gas flowmeter calibration device; the simulation shaft is arranged on the horizontal rack, and the two ends of the horizontal rack are respectively arranged on the horizontal rail and the vertical rail in a sliding mode, and an oil-water inlet, a gas inlet and an oil-water gas outlet are formed in the simulation shaft. According to the device, the real simulation of the flow state of the fluid in an actual oil-gas shaft can berealized. Basic test data are provided for the gas lifting oil production theories and processes. The oil well oil-gas-water three-phase gas lifting oil production process simulation device has the advantages of being simple in principle, complete in function, convenient to use, and being safe, reliable and inexpensive.

The invention discloses a system for testing the interception performance of an anti-collision anti-terrorism antiriot apparatus. The system comprises a power portion, a guiding portion, a control portion, and an auxiliary portion. The power portion mainly comprises a DC adjustable-speed motor, a universal shaft coupling, a quill shaft magnetic powder brake, a hard tooth surface primary speed reducer, and a reel mechanism. The guiding portion comprises a steel rope, a guiding groove, an unhooking sensing device, a traction vehicle, a guide rail, and a hauling rope, wherein the guiding groove is excavated along a driving route of a vehicle at a test cement place. The control portion includes a control cabinet. The auxiliary portion includes a test cement place, a safe collision-proof wall, a testing device, and a collision vehicle. The system may effectively simulate collision between the collision vehicle and the testing device at different speeds, angles, and collision positions, and guarantees coincidence between a testing condition and a reality so as to provide an effective basis for the design and analysis of the anti-collision anti-terrorism antiriot apparatus.

A WAF reverse proxy method base on on-line flow mirror image bypass is disclosed. That method comprise the following steps: step S100, configuring a test serv at a WAF system station; Step S200: The test server mirrors the service flow on the service server in real time; Step S300: The test server analyzes and pretreats the request and response in the service flow obtained by the mirror; Step S400: The test server sends the pre-processed request and response to the WAF system for security inspection. The invention adopts the bypass deployment mode, which can test the function of the WAF systemwithout affecting the on-line service, avoids modifying the existing network topology on the line, bypasses the on-line flow to obtain the real flow on the line and analyzes the on-line flow in realtime.

The invention discloses a motor control method and system based on known parameters and relates to the technical field of motor control. The motor control method is characterized in that a dynamic friction coefficient and a static friction parameter of an indexing mechanism bearing are obtained through measurement estimation or manufacturers, a friction model of a servo motor control system is constructed by adopting a LuGre model, the real-time speed of an indexing mechanism is acquired, the real-time speed is converted into a friction torque estimated value through the friction model. The method is advantaged in that the actual friction torque of the servo motor control system is compensated, the dynamic and static characteristics of the servo motor control system are improved, the anti-interference capability is strong, the speed stability and positioning precision of the servo motor control system under the low-speed nonlinear friction condition are ensured, and a phenomenon of limit ring oscillation is avoided.

The invention relates to an intelligent sensor training device. The device comprises a hardware resource system, a software resource system and a support resource system which communicate with each other; a driving signal output by the software resource system is transmitted to an excitation source, and an excitation signal is transmitted to a sensor suite through the excitation source; a sensor suite is connected with a programmable controller module, and the programmable controller module is used for acquiring data of a controlled device through the sensor suite, and counting, analyzing and transmitting to an industrial personal computer module; the programmable controller module is connected with an Internet of Things module to perform two-way data communication. According to the device, the integration function is realized; all systems can relatively independently perform specific functions and independently work and can also be matched to form a big system for comprehensively processing related data, thus realizing real simulation of an industrial engineering environment; the actual technological problem in the industrial engineering environment is solved.

The invention discloses a gas-containing coal circulation friction-gas migration coupling test device and method. By combining and analyzing field actual conditions related to mining and rock mechanics and designing a clamping cushion block with a groove and a nested axial loading oil cylinder, the problem that the device is difficult to seal is emphatically solved, and coupling analysis of coal rock circulating friction and seepage problems is achieved. The device mainly comprises a gas-containing coal circulation friction system, a gas injection and pressurization system and a data real-timeacquisition system, the cyclic friction slippage behavior and the gas seepage of the coal and rock mass can be simultaneously carried out; a data real-time acquisition system is used for carrying outdata monitoring and acquisition on the cyclic friction shear slip state and the gas migration characteristics of the coal and rock mass; the test device can effectively simulate the gas-containing coal rock circulation friction slip phenomenon of a fault structure or a through fracture, and has great significance in researching the mechanism of coal and gas outburst induced by slip instability and coal safety mining and disaster prevention and control.

The embodiment of the invention discloses a running-in device of a hydraulic operating mechanism used for a high-pressure SF6 breaker. The running-in device of the hydraulic operating mechanism used for the high-pressure SF6 breaker comprises a totally enclosed columnar box body, a piston, medium containing device, a driving connecting rod and damping mediums. The piston is embedded inside the box body, the outer surface of the piston is abutted against the inner wall of the box body, and the box body is divided into an upper cavity and a lower cavity by the piston, wherein the upper cavity and the lower cavity are not communicated with each other. The medium containing device is arranged outside the box body, the medium containing device is connected with the upper cavity and the lower cavity through two guide pipes, and the communication is achieved. One end of the driving connecting rod is placed inside the lower cavity and fixed on the piston, and the other end of the driving connecting rod is placed outside the box body and is matched with the hydraulic operating mechanism. The upper cavity and the lower cavity are filled with the damping mediums. When the driving connecting rod moves, the piston is driven to slide along the inner wall of the box body in the direction of facing or deviating from the lower cavity. According to the running-in device of the hydraulic operating mechanism used for the high-pressure SF6 breaker, the adaptability is high, aiming at the damping changing condition of various high-pressure SF6 breakers in the divide-shut braking process, the real-time dynamic closed-loop adjustment on the damping is achieved, the installing and fitting testing time of the hydraulic operating mechanism and the high-pressure SF6 breaker is shortened, and the delivering efficiency and the quality of the mechanism are improved.

The invention discloses a multi-degree-of-freedom stage-separation test device, and belongs to the field of carrier rocket stage-separation tests. The multi-degree-of-freedom stage-separation test device comprises a test rack car, a yaw rotating shaft, a U-shaped supporting frame, a first pitching support lug and a second pitching support lug. The U-shaped supporting frame comprises a cross beam and vertical beams, wherein the vertical beams are fixed to the two ends of the cross beam and parallel to each other. One end of the rotating shaft penetrates into the middle of the cross beam so that the U-shaped supporting frame can rotate relative to the yaw rotating shaft. The first pitching support lug and the second pitching support lug are oppositely fixed to the vertical beams of the U-shaped supporting frame, located in the same plane and used for supporting separating bodies. The invention further discloses a stage-separation test method using the multi-degree-of-freedom stage-separation test device. According to the multi-degree-of-freedom stage-separation test device and the multi-degree-of-freedom stage-separation test method, the stage-separating process can be simulated actually under the multi-degree-of-freedom condition.

The invention relates to the field of study of marine pile foundation engineering, and provides a horizontal bi-directional cyclic load loading device based on a model box and a testing method. The horizontal bi-directional cyclic load loading device is characterized in that the model box is of a cube box structure of which the top is open, the model box is filled with a soil layer, and water is accommodated on the surface of the soil layer; fixed pulleys are mounted on the two adjacent edges of the model box; a loading system comprises two completely the same loading components used for forcecycle controlled loading; a monitoring system comprises a data collector; and the data collector is connected with dynamometers, strain gages and displacement sensors through a cable. According to the horizontal bi-directional cyclic load loading device, cyclic load effects like storm load and wave load suffered by a marine pile foundation can be simulated in the model box, two horizontal cyclicloadings perpendicular to each other are achieved, real simulation is achieved, different two-dimensional horizontal cyclic loads are output through changing of conditions like load amplitude, cycle frequency and cycle times, and superposition of loads under various natural conditions is simulated.

The invention discloses a movable vibration exciter for simulating a train load and a loading method thereof. The movable vibration exciter comprises a rail mechanism, a traction device and a vibration device, the traction device and the vibration device are both movably arranged on the rail mechanism, the rear end of the traction device is hinged to the front end of the vibration device, the traction device is used for driving the vibration device to move on the rail mechanism, and the vibration device is used for generating variable-frequency excitation force to the rail mechanism. The traction device and the vibration device are arranged on the rail mechanism, the vibration device is driven by the traction device to move on the rail mechanism, variable-frequency excitation force is generated on the rail mechanism in the moving process of the vibration device, the loading process of the vibration device can effectively simulate the real train load, and the influence of the train loadon a roadbed is analyzed; guidance can be provided for engineering construction according to dynamic response result feedback of the roadbed, the train load can be well simulated, the difficulty is low, the simulation trueness is high, and the simulation is closer to the actual situation.

The invention discloses an operation counter-force simulation and control system for a remote operation system. The operation counter-force simulation and control system comprises an operation mechanism, a position sensor, a force sensor, a counter-force simulation mechanism, a power driver and a controller, and is characterized in that the position sensor and the force sensor are respectively used for detecting current operation displacement and operation force of the operation mechanism; the controller receives signals from the position sensor and the force sensor, realizes calculation of the operation counter-force, a counter-force simulation control algorithm and an instruction force closed-loop control and outputs a voltage control signal to the power driving module to simulate the operation counter-force. On the premise of no dependency on an execution mechanism of the remote operation system, by the design of the counter-force simulation control algorithm of the operation mechanism, real simulation of any operation counter-force including friction force with any amplitude value can be realized.

The invention belongs to the technical field of biological simulation experiments and relates to a sealable and openable type small ecosystem simulation experiment device. A glass cover and a stainless steel box body with the open upper end are placed on a base, sampling holes are evenly formed in the glass cover, the stainless steel box body is provided with sampling holes the same as those in the glass cover, and a support is installed between the glass cover and the stainless steel box body. A xenon lamp tube, an ultraviolet lamp tube and a shower pipe are fixedly installed above the support. A temperature sensor and a humidity sensor are installed on the two sides of the support in an embedded mode, small holes are evenly drilled at the bottom of the stainless steel box body, a filter screen is arranged in the base, an independent water tank is installed on the left side of the base, a water pump is installed in the water tank, and a control panel is installed on the water tank. A power switch, a water pump switch, an ultraviolet lamp switch, a xenon lamp switch and a temperature and humidity display are arranged on the control panel. The water pump is communicated with the stainless steel box body through a water pipe. The sealable and openable type small ecosystem simulation experiment device is simple in structure, convenient to operate, low in cost, environmentally friendly and convenient to popularize and use.

The invention provides a method and apparatus for testing the flow control device protocol identification capability. The method is applicable to a test client with network applications, the test client is connected with a flow control device at the local network port where the test client is arranged. The method includes receiving and parsing the test case, obtaining the application name of the target network application to be called, the operation instruction for the target network application, and the expected identification result of the expected data message; according to the operation instruction, performing data interaction between the called target network application and external network to obtain the actual identification result by the flow control device for the actual data message; comparing the expected identification result with the actual identification result, and determining that the application level protocol of the actual data message is identified by the flow control device when the comparison result is the same. The selectable application level protocol range can be rapidly developed through the adding of the network application and the test case. The invention is no longer limited to the application level protocol preset by a test instrument.

The invention discloses a three-dimensional radar simulating system. The system comprises an aircraft, a comprehensive radio frequency subsystem and a ground device; a GPS positioning module, a differential DPS positioning module, a data transmission module, a flight control module, a remote control module and an STM32 control module are carried on the aircraft; the comprehensive radio frequency subsystem comprises a radio frequency module, a medium frequency processing module and a control module; the ground device comprises a master control computer, a ground operation scheduling control module, a digital signal processing board card, a storage mother board and a radio frequency receiving module which are connected through VPX buses, and the storage mother board is connected with a plurality of large-capacity data storage modules. According to the system, the advanced comprehensive radio frequency subsystem and the ground device carried on the micro aircraft for forming a distributedradar simulator capable of moving freely in a three-dimensional space, and the long-standing problems that a traditional radar simulator lacks maneuverability and is greatly affected by ground clutter, and cooperation of multiple simulators and networking are achieved difficultly are solved fundamentally.

The invention provides a supersonic engine test stand. A high-altitude simulation cabin is of a sealed shell structure. An engine thrust measurement platform is fixedly installed in the high-altitudesimulation cabin. A tested engine is installed on the engine thrust measurement platform. An air inlet system is in communication with the tested engine or an exhaust system. One end of the exhaust system penetrates through the shell surface of the high-altitude simulation cabin and is fixedly installed in the high-altitude simulation cabin, and the other end of the exhaust system is in fixed communication with an exhaust gas treatment system. The supersonic engine test stand realizes the simulation of a supersonic air inlet state of a supersonic engine during ground tests of the supersonic engine and the engine; meanwhile, the engine thrust measurement platform realizes the measurement of engine thrust, and the structure is simple; in addition, the treatment of exhaust gas from the enginetest stand is realized, so that the gas discharged from an air outlet of an alkaline spray tower meets the national pollutant emission standard; and a noise reduction tower is arranged, the exhaust of the exhaust system is subjected to noise reduction, and noise pollution is avoided.