Central air conditioning system for intelligent noise control of ship

Abstract

The invention discloses a ship intelligent noise control central air conditioning system which comprises an acoustic data acquisition system, an acoustic data transmission unit, a central control calculation management center, a sound wave reconstruction and processing device and a dynamic execution mechanism. The acoustic data acquisition system, the acoustic data transmission unit, the central control calculation management center, the acoustic wave reconstruction and processing device and the dynamic execution mechanism are connected in sequence. The system has better scientificity, comfort and energy-saving performance, and the limitation of a traditional noise reduction mode on the sound absorption effect is optimized; secondly, aerodynamic noise originally needing to be suppressed is reasonably converted and utilized to become beneficial sound waves for cabin noise control, and efficient utilization of energy is achieved; and meanwhile, accurate regulation and control of noise can be achieved according to different scenes, and the beneficial effects of being more intelligent, more efficient and more energy-saving are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ship intelligent noise control central air conditioning system, belong to ship living cabin comfort promotion, air conditioning system Intelligent noise reduction and other technical fields. BACKGROUND

[0002] To ensure the efficiency of ship operation and operation standardization, as a key auxiliary facility of ship, central air conditioning system plays an irreplaceable role in improving the comfort of passengers and optimizing the efficiency of crew. The particularity of the closed cabin space of the ship makes the traditional central air conditioning system inevitably restricted by multiple factors such as building layout, height limit and cabin space planning in engineering design. Although the existing design can ensure the stability of the cabin temperature and humidity parameters, it cannot systematically take targeted noise reduction measures and effective control measures for mechanical noise and aerodynamic noise of the air conditioning system.

[0003] The application of the current mainstream noise reduction technology mainly includes the following two dimensions: (1) Sound source control level: by adding rubber shock pads, elastic support structures or sound-absorbing materials to the moving parts of power equipment such as compressor condenser units and air conditioners, the source of vibration and noise is treated; (2) Transmission path control level: in the air conditioning pipe system, silencer devices are installed at key nodes with high airflow speed and frequent vibration to block the transmission path of noise diffusion along the pipeline.

[0004] Although the above technical solutions have been widely used in the field of ship engineering, through systematic analysis, the following technical bottlenecks need to be optimized: Firstly, the existing noise reduction strategy has the defect of non-adaptability, which cannot implement graded quantitative reduction according to the characteristics of noise of different decibel levels; secondly, the noise reduction efficiency of the existing sound-absorbing material is significantly restricted by environmental conditions, service life, maintenance frequency and equipment status, resulting in insufficient noise reduction stability; thirdly, the noise generated by air power is not recycled, causing energy loss. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing central air conditioning system cannot implement targeted quantitative reduction of noise with different characteristics; the sound-absorbing material used in the existing technology is limited by environmental conditions, service life, maintenance frequency and equipment status, and has limited sound-absorbing capacity; the existing technology does not effectively utilize the noise generated by air power, resulting in energy waste.

[0006] To solve the above technical problems, the technical solution of the present application provides a kind of ship intelligent noise control central air conditioning system, characterized by comprising Acoustic data acquisition system: for real-time acquisition of sound source characteristics of the cabin; Acoustic data transmission unit: for preprocessing and transmitting the sound source characteristics collected by the acoustic data acquisition system to the central control computing management hub; Central control computing management hub: receiving the transmission data of the acoustic data transmission unit, and performing real-time frequency domain analysis on the data, generating dynamic sound wave compensation signal, and performing optimization calculation of noise modification strategy, and transmitting the dynamic sound wave compensation signal to the sound wave reconstruction and processing device; Sound wave reconstruction and processing device: receiving the dynamic sound wave compensation signal of the central control computing management hub, constructing a dynamic model of the sound field, obtaining the physical parameters of the reconstructed sound wave related air flow characteristics, and transmitting them to the dynamic execution mechanism; Dynamic execution mechanism: according to the physical parameters of the sound wave reconstruction and processing device, the air flow into the cabin is disturbed and adjusted to realize noise control optimization; Acoustic data acquisition system, acoustic data transmission unit, central control computing management hub, sound wave reconstruction and processing device and dynamic execution mechanism are connected in turn.

[0007] Preferably, the acoustic data acquisition system comprises an active noise perception module, an environmental noise monitoring module, an aerodynamic noise monitoring module, and a high-precision acoustic sensor array, and the high-precision acoustic sensor array is connected to the active noise perception module, the environmental noise monitoring module, and the aerodynamic noise monitoring module respectively.

[0008] Preferably, the high-precision acoustic sensor array is arranged in the ship cabin, the air conditioning pipe system, and the air supply and return terminal, respectively, to perceive and collect the sound source characteristics of the cabin environmental noise and air aerodynamic noise in real time; the acoustic data acquisition system is a distributed data acquisition terminal.

[0009] Preferably, the acoustic data acquisition system collects the sound source characteristics of the cabin in real time, including the frequency, sound pressure level, amplitude, period, gas flow rate, and gas pressure of the environmental noise and the aerodynamic noise of the air conditioning pipe system; and the spectral characteristics and vibration waveform of the noise source and vibration source are obtained through preprocessing by the acoustic data transmission unit.

[0010] Preferably, the acoustic data transmission unit comprises a sound wave receiving and preprocessing end, a data encoding and decoding module, a high-speed communication cable, a switch, and a communication interface; the sound wave receiving and preprocessing end communicates to the data encoding and decoding module, and the data encoding and decoding module realizes bidirectional communication with the high-speed communication cable, the switch, and the communication interface respectively; the sound source characteristics collected by the acoustic data acquisition system are preprocessed by the sound wave receiving and preprocessing end and transmitted to the central control computing management hub through the data encoding and decoding module.

[0011] Preferably, the central control computing management hub is divided into hardware and software layers, the hardware layer includes: data processing and human-computer interaction system, central control host, monitoring terminal, network and communication module, data storage module; the software layer includes: real-time operating system, noise reduction intelligent algorithm, central control management software, user interface and diagnosis and log.

[0012] Preferably, the central control computing management hub gives corresponding dynamic compensation sound signals according to the intelligent algorithm; the noise control reference of the intelligent algorithm should strictly follow the national environmental noise standard, the noise specification of the transportation industry and the specification standard of the ship noise management regulation, which is the minimum requirement for environmental acoustic optimization; on this basis, different acoustic requirements of different scenes are designed differently: for the working scene, the voice intelligibility and low-frequency interference suppression should be ensured; for the rest scene, the background noise should be controlled to the comfort threshold and the sudden sound source should be eliminated; for the movement and entertainment scene, the dynamic sound pressure and spectral characteristics need to be balanced.

[0013] Preferably, the central control computing management hub builds a multi-dimensional acoustic demand matrix, combines real-time environmental monitoring data, and uses an iterative optimization algorithm to dynamically calculate the ideal acoustic characteristic parameters and waveform model under each working condition; the output dynamic compensation sound wave parameters need to meet the real-time environmental noise cancellation requirements, while ensuring acoustic comfort and standard compliance.

[0014] Preferably, the sound wave reconstruction and processing device includes a sound wave signal reconstruction module and a sound wave signal conversion module, which obtains dynamic sound wave compensation signals through the optimization calculation of the central control computing management hub, builds a dynamic model of the sound field through the sound wave signal reconstruction module, obtains the characteristic parameters and dynamic waveform of the reconstructed sound wave, obtains the physical parameters corresponding to the air flow characteristics, and transmits them to the dynamic execution mechanism after conversion through the sound wave signal conversion module.

[0015] Preferably, the dynamic execution mechanism includes a pneumatic sound generating device and an electronic control system; the key parameters of the air flow required by the reconstructed sound field are transmitted to the pneumatic sound generating device through the electronic control system, and the air conditioning airflow entering the cabin is disturbed and adjusted through the pneumatic sound generator, so that the air flow and the structure produce air flow changes, and then produce different frequency sounds, so that it can maintain the air supply function while realizing active noise cancellation and cabin background noise optimization.

[0016] The present application aims at the problem of significant aerodynamic noise generated by the central air conditioning system of a ship during air supply and return, and proposes an intelligent noise reduction technology. On the basis of the existing central air conditioning system, an acoustic data acquisition system for the cabin environment and the air conditioning system is added, and the sound wave characteristics, frequency spectrum distribution and sound pressure level parameters of various characteristic environmental noise and air aerodynamic noise are collected, analyzed and stored and managed. Through the calculation simulation of the central control unit, the sound wave waveform required for real-time noise suppression and noise modification is obtained, and the air conditioning airflow and sound wave compound control technology is adopted. Through the establishment of an optimized model of the acoustic environment of the ship cabin, the airflow vibration noise generated by part of the air supply is controlled in a targeted manner by using sound wave reconstruction and optimization technology, so that the original ventilation function is maintained while the beneficial sound waves complementary to the frequency characteristics of the cabin noise are generated. The beneficial sound source effectively offsets the noise energy in the cabin through the wave superposition principle, thereby achieving the effects of active cancellation of aerodynamic noise and optimization of cabin environmental noise. Not only does it improve the comfort of the personnel cabin and create a sound environment conducive to the work and life of personnel, but it also realizes the reuse of aerodynamic noise energy and provides a new solution for the optimization of the acoustic environment of the ship cabin. Compared with the traditional passive noise reduction technology, the present application has the innovative advantages of significant noise reduction effect, no additional energy consumption and strong system compatibility, and provides a new solution for the optimization of the acoustic environment of the ship cabin.

[0017] Compared with the prior art, the present application has better scientificity, comfort and energy saving, and optimizes the limitations of traditional noise reduction methods in terms of sound absorption effect. Secondly, the aerodynamic noise that needs to be suppressed is reasonably transformed and utilized, so that it becomes beneficial sound waves for cabin noise control, realizing efficient energy utilization. At the same time, precise noise control can be realized according to different scenes, and the beneficial effects of intelligence, efficiency and energy saving are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Figure 1 is a schematic diagram of a ship intelligent noise control central air conditioning system according to the present application. Figure 2 Figure 2 is a flow chart of the intelligent noise control of the ship intelligent noise control central air conditioning system according to the present application. DETAILED DESCRIPTION

[0019] In order to make the present application more obvious and easy to understand, the preferred embodiments are described in detail below with reference to the accompanying drawings.

[0020] The present application discloses a ship intelligent noise control central air conditioning system, which provides a comfortable and quiet living and working environment for crew members, as shown in Figure 1. Figure 1 As shown in Figure 1, it comprises an acoustic data acquisition system 101, an acoustic data transmission unit 102, a central control calculation management hub 103, a sound wave reconstruction and processing device 104 and a dynamic execution mechanism 105.

[0021] As shown in Figure 2, the intelligent noise control process of the ship intelligent noise control central air conditioning system according to the present application comprises the following steps:Figure 1 , Figure 2 As shown, the acoustic data acquisition system 101 includes an active noise sensing module, an environmental noise monitoring module, an aerodynamic noise monitoring module, and a high-precision acoustic sensor array. By deploying the high-precision acoustic sensor array of the acoustic data acquisition system 101 in key locations such as ship cabins, air conditioning duct systems, and supply and return air terminals, the system can sense and collect the sound source characteristics of cabin environmental noise and aerodynamic noise in real time.

[0022] The acoustic data transmission unit 102 includes a sound wave receiving and preprocessing end, a data encoding and decoding module, a high-speed communication cable, a switch, and a communication interface. The sound wave receiving and preprocessing end communicates with the data encoding and decoding module, and the data encoding and decoding module communicates bidirectionally with the high-speed communication cable, the switch, and the communication interface, respectively. Through a distributed data acquisition terminal, parameters such as the acoustic wave characteristics, frequency spectrum, and sound pressure intensity of noise are acquired synchronously. The acquired sound source characteristics are preprocessed by the sound wave receiving and preprocessing end of the acoustic data transmission unit 102 and transmitted to the central control computing management hub 103 via the data encoding and decoding module.

[0023] The central control computing management hub 103 is divided into hardware and software layers. The hardware layer includes: a data processing and human-computer interaction system, a central control host, a monitoring terminal, a network and communication module, and a data storage module. The software layer includes: a real-time operating system, a noise reduction intelligent algorithm, central control management software, a user interface, and diagnostic and log processing. Based on the central control computing management hub 103, real-time frequency domain analysis is performed on the input data to extract the biological characteristics or key parameters of the sound (such as: frequency, amplitude, sound pressure level, noise spectrum, etc.). Different sound wave characteristics are analyzed through machine learning models. For different sound waves, dynamic sound wave compensation signals are generated through target algorithms such as suppression and optimization, and optimization calculations for noise reduction strategies are executed.

[0024] The acoustic wave reconstruction and processing device 104 includes an acoustic wave signal reconstruction module and an acoustic wave signal conversion module. The dynamic acoustic wave compensation signal calculated by the central control computing management hub 103 is transmitted to the acoustic wave reconstruction and processing device 104. By constructing a dynamic model of the sound field, the physical parameters of the airflow characteristics related to the reconstructed acoustic wave (such as flow velocity, amplitude, pressure pulse, frequency, etc.) are obtained.

[0025] The dynamic actuator 105 includes a pneumatic sound generator and an electronic control system. The electronic control system transmits key airflow parameters (such as flow velocity, amplitude, pressure pulse, frequency, etc.) required for reconstructing the sound field to the pneumatic sound generator. The specific pneumatic sound generator then disturbs and regulates the air conditioning airflow delivered into the cabin. By controlling the airflow velocity, pressure, or path, the airflow and structure are made to generate eddies or resonances, thus producing sounds of different frequencies. This allows the system to maintain its air supply function while actively canceling aerodynamic noise and optimizing cabin background noise.

[0026] The pneumatic sound generator is equipped with sound generating units for three frequency bands: low frequency, mid frequency, and high frequency. The sound source is the air supply air of the air-conditioned cabin. Based on the original air supply and return air ducts of the air conditioner, a branch duct for noise reduction is added. A pneumatic sound generator is installed on this branch to form a reconstructed sound source with a specific waveform. This reconstructed sound source is used to cancel and control cabin noise.

[0027] This invention also provides an intelligent noise control method for a ship's central air conditioning system, including but not limited to the following steps: Step 1: During ship operation, the acoustic data acquisition system 101 acquires in real time the frequency and sound pressure level of the ambient noise in the cabin and the aerodynamic noise of the air conditioning system, as well as the amplitude, period, gas flow velocity, air pressure and other relevant physical parameters of the vibration; and obtains the spectrum characteristic diagram and vibration waveform diagram of the noise source and vibration source through the acoustic data transmission unit 102 respectively.

[0028] Step 2: Transmit the physical parameters, spectrum diagrams, waveform diagrams, and other data of the noise and vibration sources collected in real time to the central control computing management hub 103. The central control computing management hub 103 then provides the corresponding dynamic compensation acoustic wave signal based on the intelligent algorithm.

[0029] The noise control benchmark for intelligent algorithms should strictly adhere to national environmental noise standards, transportation industry noise regulations, and ship noise management regulations, serving as the minimum requirements for environmental acoustic optimization. Based on this, differentiated designs are needed to address the acoustic requirements of different scenarios: for work scenarios, speech clarity and low-frequency interference suppression must be ensured; for rest scenarios, background noise should be controlled to a comfortable threshold and sudden sound sources eliminated; for sports and entertainment scenarios, dynamic sound pressure level and spectral characteristics must be balanced. By constructing a multi-dimensional acoustic requirement matrix and combining iterative optimization algorithms with real-time environmental monitoring data, ideal acoustic characteristic parameters (including but not limited to sound pressure level, frequency range, transient response time, etc.) and waveform models under various operating conditions are dynamically calculated. The final output dynamic compensation sound wave parameters must meet real-time environmental noise cancellation requirements while ensuring acoustic comfort and standard compliance.

[0030] Step 3: The parameters of the real-time dynamic compensation sound wave calculated by the central control computing management hub 103 are transmitted to the sound wave reconstruction and processing device 104. Based on the characteristic parameters and dynamic waveform of the reconstructed sound wave, the physical parameters of the corresponding airflow characteristics, such as flow velocity, amplitude, pressure, frequency, and vibration waveform, are obtained and transmitted to the dynamic actuator.

[0031] Step 4: The dynamic actuator 105 adjusts the original airflow of the air conditioner's supply and return air to form a target airflow that conforms to specific noise reduction waveform parameters. Specifically, the electronic control system deconstructs the sound wave parameters of different frequency bands (low, mid, and high) and transmits them to the pneumatic sound generator. By precisely controlling the airflow speed, pressure parameters, airflow path, vibration frequency, amplitude, and other physical characteristics, the system ultimately reconstructs and outputs the sound waves at each frequency band.

[0032] Using the above method, the reconstructed sound waves are simultaneously transmitted to the cabin during the air conditioning supply and return, thereby effectively canceling environmental noise and duct aerodynamic noise, and achieving active control of the noise environment.

Claims

1. A central air conditioning system for intelligent noise control on ships, characterized in that, include Acoustic data acquisition system (101): used to acquire the sound source characteristics of the cabin in real time; Acoustic data transmission unit (102): used to preprocess the sound source characteristics collected by the acoustic data acquisition system (101) and transmit them to the central control computing management center (103). Central control computing management hub (103): receives the transmitted data from the acoustic data transmission unit (102), performs real-time frequency domain analysis on the data, generates dynamic acoustic wave compensation signal, performs optimization calculation of noise modification strategy, and transmits the dynamic acoustic wave compensation signal to the acoustic wave reconstruction and processing device (104). Sound wave reconstruction and processing device (104): Receives dynamic sound wave compensation signal from central control computing management center (103), constructs dynamic model of sound field, obtains physical parameters of air flow characteristics related to reconstructed sound wave, and transmits them to dynamic actuator (105). Dynamic actuator (105): Based on the physical parameters of the acoustic reconstruction and processing device (104), it turbulently adjusts the airflow of the air conditioning system sent into the cabin to achieve noise control optimization; The acoustic data acquisition system (101), the acoustic data transmission unit (102), the central control computing management center (103), the acoustic wave reconstruction and processing device (104), and the dynamic actuator (105) are connected in sequence.

2. The central air conditioning system for intelligent noise control on ships as described in claim 1, characterized in that, The acoustic data acquisition system (101) includes an active noise sensing module, an environmental noise monitoring module, an aerodynamic noise monitoring module, and a high-precision acoustic sensor array. The high-precision acoustic sensor array is connected to the active noise sensing module, the environmental noise monitoring module, and the aerodynamic noise monitoring module, respectively.

3. The central air conditioning system for intelligent noise control on ships as described in claim 2, characterized in that, The high-precision acoustic sensor arrays are respectively arranged in the ship's cabins, air conditioning duct systems, and supply and return air terminals to sense and collect the sound source characteristics of cabin environmental noise and aerodynamic noise in real time. The acoustic data acquisition system (101) is a distributed data acquisition terminal.

4. A central air conditioning system for intelligent noise control on ships as described in claim 1 or 3, characterized in that, The acoustic data acquisition system (101) collects the sound source characteristics of the cabin in real time, including the frequency and sound pressure level of ambient noise and aerodynamic noise of the air conditioning system, as well as the amplitude, period, gas flow velocity, and air pressure of vibration. The acoustic data transmission unit (102) preprocesses the noise source and vibration source to obtain the spectrum characteristic diagram and vibration waveform diagram, respectively.

5. A central air conditioning system for intelligent noise control on ships as described in claim 1, characterized in that, The acoustic data transmission unit (102) includes a sound wave receiving and preprocessing end, a data encoding and decoding module, a high-speed communication cable, a switch, and a communication interface. The sound wave receiving and preprocessing end communicates with the data encoding and decoding module, and the data encoding and decoding module communicates bidirectionally with the high-speed communication cable, the switch, and the communication interface. The acoustic source characteristics collected by the acoustic data acquisition system (101) are preprocessed by the sound wave receiving and preprocessing end and transmitted to the central control computing management hub (103) through the data encoding and decoding module.

6. A central air conditioning system for intelligent noise control on ships as described in claim 1, characterized in that, The central control computing management hub (103) is divided into hardware and software layers. The hardware layer includes: data processing and human-computer interaction system, central control host, monitoring terminal, network and communication module, and data storage module; the software layer includes: real-time operating system, noise reduction intelligent algorithm, central control management software, user interface, and diagnostics and logs.

7. A central air conditioning system for intelligent noise control on ships as described in claim 1 or 6, characterized in that, The central control computing management hub (103) provides the corresponding dynamic compensation sound wave signal according to the intelligent algorithm; the noise control benchmark of the intelligent algorithm should strictly follow the national environmental noise standard, the noise specification of the transportation industry and the regulations on ship noise management, and take them as the minimum requirements for environmental acoustic optimization; on this basis, differentiated design should be carried out in combination with the acoustic requirements of different scenarios: for the work scenario, speech clarity and low frequency interference suppression should be ensured; for the rest scenario, background noise should be controlled to the comfort threshold and sudden sound sources should be eliminated; for the sports and entertainment scenarios, dynamic sound pressure and spectrum characteristics should be balanced.

8. A central air conditioning system for intelligent noise control on ships as described in claim 7, characterized in that, The central control computing management hub (103) constructs a multi-dimensional acoustic demand matrix, combines real-time environmental monitoring data, and uses an iterative optimization algorithm to dynamically calculate the ideal acoustic characteristic parameters and waveform models under various working conditions; the output dynamic compensation acoustic parameters must meet the real-time environmental noise cancellation requirements, while ensuring acoustic comfort and standard compliance.

9. A central air conditioning system for intelligent noise control on ships as described in claim 1, characterized in that, The sound wave reconstruction and processing device (104) includes a sound wave signal reconstruction module and a sound wave signal conversion module. The dynamic sound wave compensation signal is calculated by the central control computing management center (103). The dynamic model of the sound field is constructed through the sound wave signal reconstruction module to obtain the characteristic parameters and dynamic waveform of the reconstructed sound wave, and the physical parameters corresponding to the airflow characteristics are obtained. After conversion by the sound wave signal conversion module, the signal is transmitted to the dynamic actuator (105).

10. A central air conditioning system for intelligent noise control on ships as described in claim 1, characterized in that, The dynamic actuator (105) includes a pneumatic sound generator and an electronic control system. The electronic control system transmits the key parameters of the airflow required for reconstructing the sound field to the pneumatic sound generator, and the pneumatic sound generator disturbs and adjusts the airflow of the air conditioning system sent into the cabin, so that the airflow and the structure produce airflow changes, thereby generating sounds of different frequencies, so that while maintaining the air supply function, it can achieve active cancellation of aerodynamic noise and optimization of cabin background noise.

Images