Aerator state detection system and method

Abstract

The invention provides an aerator state detection system and method, and belongs to the field of electronic information engineering, and the method comprises the steps: obtaining an analog audio signal, a first electric signal and a second electric signal; field audio characteristics are extracted through the analog audio signals, the resultant acceleration and the water wave pressure change frequency of a floating ball are determined through the first electric signals, and the oil contamination content in water is determined through the second electric signals; and when the field audio frequency characteristic or the resultant acceleration and the water wave pressure change frequency are in a corresponding preset fault signal range, or the oil content in the water is greater than or equal to a preset concentration, determining that the aerator has a fault. The working state of the aerator is effectively recognized and evaluated through three different data of acceleration, sound and oil contamination concentration, detection information is rich, multiple fault judgment standards are provided, the fault detection accuracy is high, once the aerator breaks down, the aerator can be found in time, accurate solutions can be taken, and the working efficiency of the aerator is improved. And the possible economic loss is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the field of electronic information engineering, and in particular relates to an aerator state detection system and method. Background Art

[0002] Aerators are commonly used equipment for pond aquaculture. Their main function is to increase the oxygen content in the water to ensure that the fish in the water will not be deprived of oxygen. At the same time, they can also inhibit the growth of anaerobic bacteria in the water and prevent the deterioration of the pond water from threatening the living environment of the fish. However, long-term use may cause a series of problems such as oil leakage, water plate shaft shaking, mechanical wear and abnormal noise. If the aerator failure is not repaired in time, it will lead to insufficient dissolved oxygen supply in the water, causing fish deaths and water quality deterioration. In addition, unstable oxygenation cannot effectively stir the bottom of the water, affect microbial activity, weaken fish immunity, and increase the risk of disease. In short, delays in troubleshooting can seriously affect the health of fish ponds and aquaculture benefits.

[0003] The traditional method of detecting the working status of an aerator mainly judges its operating status through video image processing. Generally, it can only judge the two states of the aerator, "on" and "off". The judgment standard is too single. If the aerator has a fault that cannot be identified through video images, such as damage to internal components, the abnormal state of the aerator cannot be detected in time, which may cause economic losses. Summary of the invention

[0004] In order to solve the above-mentioned problem that the criterion for judging aerator failure is too single, the present invention provides an aerator state detection system and method.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, an aerator state detection system is provided, the system comprising:

[0007] A signal acquisition module, used to acquire the analog audio signal generated when the aerator is working and the acceleration of the float near the working area of ​​the aerator, and convert the acceleration into a first electrical signal;

[0008] The oil pollution detection module is used to obtain the fluorescence signal generated by the oil pollution under ultraviolet light irradiation and convert the fluorescence signal into a second electrical signal;

[0009] A signal processing module, used to convert the analog audio signal, the first electrical signal and the second electrical signal into corresponding digital signals; extract the field audio characteristics, the change characteristics of the water wave pressure and the oil pollution concentration in the water of the corresponding digital signals;

[0010] The processor is used to determine that the aerator is faulty when the field audio characteristics and the water wave pressure change frequency are within the corresponding preset fault signal range, or the oil pollution concentration in the water is greater than or equal to the preset concentration.

[0011] Optionally, the processor is further configured to determine that the aerator is in a shutdown state when the field audio feature is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency.

[0012] Optionally, the signal acquisition module includes a microphone and a three-axis acceleration sensor, wherein the microphone is used to acquire the analog audio signal generated when the aerator is working; and the three-axis acceleration sensor is used to acquire the acceleration of the floating ball near the working area of ​​the aerator;

[0013] The oil pollution detection module includes an ultraviolet lamp and a photodiode.

[0014] Optionally, the signal processing module includes a filter amplifier circuit, an audio codec chip and a digital-to-analog converter;

[0015] The filtering and amplifying circuit is used to filter and enhance the analog audio signal, the first electrical signal and the second electrical signal;

[0016] The audio codec chip is used to convert the filtered and enhanced analog audio signal into a first digital signal;

[0017] The digital-to-analog converter is used to convert the first electric signal and the second electric signal after filtering and enhancement into a second digital signal and a third digital signal respectively.

[0018] Optionally, the system further comprises:

[0019] A transparent shell is provided with a circuit board inside, the pickup is provided on the inner wall of the shell, the three-axis acceleration sensor, the ultraviolet lamp and the photodiode are provided at the bottom of the circuit board, the circuit board is provided with a battery compartment; the battery compartment is used to supply power to the system; an antenna for sending a status signal of the aerator is provided at the bottom of the shell;

[0020] A fixing bracket, arranged on the top of the circuit board;

[0021] The solar panel is arranged on the top of the fixing bracket and is used to provide electrical energy to the battery compartment.

[0022] In a second aspect, a method for detecting an aerator state is provided, wherein the method comprises:

[0023] Acquire the analog audio signal generated when the aerator is working, the acceleration of the float near the aerator working area, and the fluorescent signal generated by the oil under ultraviolet light;

[0024] Determine the field audio characteristics near the aerator, the change characteristics of the water wave pressure and the oil pollution concentration in the water according to the simulated audio signal, the acceleration and the fluorescent signal;

[0025] When the field audio characteristics and the water wave pressure change frequency are within the corresponding preset fault signal range, or the oil pollution concentration in the water is greater than or equal to the preset concentration, it is determined that the aerator is faulty.

[0026] Optionally, the method further comprises:

[0027] When the field audio characteristic is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency, it is determined that the aerator is in a shutdown state.

[0028] The aerator state detection method provided by the present invention has the following beneficial effects:

[0029] First, the signal acquisition module is used to obtain the simulated audio signal when the aerator is working, the acceleration of the nearby float and the nearby oil concentration. Then, the state of the aerator is judged from multiple angles through the three different data of simulated audio signal, acceleration and oil concentration. This can prevent the errors that may be caused by a single data detection result and improve the accuracy of aerator state identification. In this way, through multiple groups of detection information and providing multiple fault judgment criteria, the working state of the aerator can be effectively identified and evaluated. The fault detection accuracy is high. Once the aerator fails, it can be discovered in time and accurate solutions can be made, effectively avoiding possible economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiment of the present invention and its design scheme, the following briefly introduces the drawings required for this embodiment. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The present invention is a block diagram of an aerator status detection system provided according to an exemplary embodiment.

[0032] Figure 2 The present invention is a flowchart of an aerator state detection method provided according to an exemplary embodiment of the present invention.

[0033] Explanation of the reference numerals: 1-upper shell; 2-lower shell; 3-cable fixing hole; 4-circuit board; 5-switch; 6-three-axis acceleration sensor; 7-pickup; 8-antenna; 9-ultraviolet lamp; 10-photodiode; 11-battery compartment; 12-fixing bracket; 13-solar panel. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0035] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, unless otherwise specified, "plurality" means two or more, which will not be described in detail here.

[0037] The present invention uses three different data, namely acceleration, sound and oil pollution on the water surface, to effectively identify and evaluate the working status of the aerator, with rich detection information and high fault detection accuracy. Once the aerator fails, it can be discovered in time and accurate solutions can be taken.

[0038] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] First, the present invention provides an aerator state detection system, the system comprising:

[0040] A signal acquisition module is used to acquire the analog audio signal generated when the aerator is working and the acceleration of the float near the working area of ​​the aerator, and convert the acceleration into a first electrical signal; an oil detection module is used to acquire the fluorescent signal generated by the oil under ultraviolet light irradiation, and convert the fluorescent signal into a second electrical signal; a signal processing module is used to convert the analog audio signal, the first electrical signal and the second electrical signal into corresponding digital signals; extract the corresponding field audio characteristics of the digital signal, the change characteristics of the water wave pressure and the oil concentration in the water; a processor is used to determine that the aerator is faulty when the field audio characteristics and the frequency of the water wave pressure change are within the corresponding preset fault signal range, or the oil concentration in the water is greater than or equal to the preset concentration.

[0041] The signal acquisition module includes a microphone and a three-axis acceleration sensor, the microphone is used to acquire the analog audio signal generated when the aerator is working; the three-axis acceleration sensor is used to acquire the acceleration of the float near the working area of ​​the aerator; the oil pollution detection module includes an ultraviolet lamp and a photodiode, the oil pollution detection module is used to acquire the fluorescent signal generated by the ultraviolet lamp irradiating the oil pollution, and convert the fluorescent signal into a second electrical signal through the photodiode. The signal processing module includes a filter amplifier circuit, an audio codec chip and a digital-to-analog converter; the filter amplifier circuit is used to filter and enhance the analog audio signal, the first electrical signal and the second electrical signal; the audio codec chip is used to convert the filtered and enhanced analog audio signal into a first digital signal; the digital-to-analog converter is used to convert the filtered and enhanced first electrical signal and the second electrical signal into a second digital signal and a third digital signal respectively.

[0042] In addition, the processor is also used to determine that the aerator is in a shutdown state when the field audio feature is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency.

[0043] In addition, the system also includes a transparent shell, a fixed bracket and a solar panel; a circuit board is arranged inside the transparent shell, the microphone is arranged on the inner wall of the shell, the three-axis acceleration sensor, the ultraviolet lamp and the photodiode are arranged at the bottom of the circuit board, and the circuit board is provided with a battery compartment; the battery compartment is used to supply power to the system; an antenna for sending a status signal of the aerator is arranged at the bottom of the shell; the fixed bracket is arranged on the top of the circuit board; the solar panel is arranged on the top of the fixed bracket to provide electrical energy to the battery compartment.

[0044] Based on the above aerator state detection system, the present invention provides an aerator state detector, specifically as follows Figure 1 As shown, including:

[0045] The upper shell 1 and the lower shell 2 are used for sealing connection to protect the internal components from the external environment. Both the upper shell 1 and the lower shell 2 are transparent shells; the cable fixing hole 3 is used to fix the upper shell 1 and the lower shell 2 near the aerator to prevent them from floating away with the water waves; the power supply module is used to provide voltage and current to the circuit board 4, and the power supply module may include a solar panel 13 and a battery compartment 11; the solar panel 13 is used to generate electric energy and store the electric energy in the battery compartment 11, and the circuit board 4 is supplied with power through the battery compartment 11; the switch 5 is used to control the connection between the power supply and the circuit board 4; the switch 5 can be a magnetic switch; the antenna 8, which can be a 4G or 5G rod antenna, is fixed to the outside of the upper shell 1 and is used to send the status signal of the aerator; the fixing bracket 12 is used to fix the circuit board 4, the power supply, the switch 5 and the solar panel 13, and the solar panel 13 is fixed to the top of the fixing bracket 12 to facilitate the acquisition of solar energy.

[0046] A microphone 7 is used to obtain an analog audio signal generated when the aerator is working; a three-axis acceleration sensor 6 is used to obtain a first electrical signal according to the acceleration of a float near the working area of ​​the aerator; an oil detection circuit includes an ultraviolet lamp module and a fluorescence detection circuit, the ultraviolet lamp module is used to generate ultraviolet light; the fluorescence detection circuit is used to obtain a fluorescence signal generated by oil under ultraviolet light irradiation, and convert the fluorescence signal into a second electrical signal; a signal conversion circuit is used to convert the analog audio signal, the first electrical signal and the second electrical signal into a digital signal; a signal processing module is used to extract the signal characteristics of the digital signal; a processor is used to determine the state of the aerator according to the signal characteristics.

[0047] Among them, the pickup 7 can be a miniature pickup, the ultraviolet lamp module includes an ultraviolet lamp 9, and the fluorescence detection circuit includes a photodiode 10; the signal conversion circuit includes: a filtering and amplifying circuit, used to filter and enhance the analog audio signal, the first electrical signal and the second electrical signal; an audio codec chip, used to convert the analog audio signal into a first digital signal; a digital-to-analog converter, used to convert the first electrical signal and the second electrical signal into a second digital signal and a third digital signal respectively; the signal processing module can be a DSP chip, and the processor can be an stm32 single-chip microcomputer chip.

[0048] Specifically, the three-axis acceleration sensor 6 works based on the basic principle of acceleration and measures the components of the float on three coordinate axes (X, Y, Z); when the three-axis sensor is subjected to acceleration, the sensitive element inside it will deform or displace, thereby generating a first electrical signal proportional to the acceleration. After the first electrical signal is converted into a second digital signal, the processor determines the acceleration components of the float in three directions through the second digital signal, and then determines the synthetic acceleration of the float. The ultraviolet lamp module includes an ultraviolet lamp 9 and an ultraviolet lamp control circuit, and the ultraviolet lamp control circuit is used to control the ultraviolet lamp 9 to be in a constant light state and continuously irradiate ultraviolet rays to the outside; the fluorescence detection circuit includes a photosensitive element and a photodiode 10, and the fluorescence signal is obtained through the photosensitive element, and the fluorescence signal is converted into a second electrical signal through the photodiode 10.

[0049] In addition, the aerator state detector may further include a circuit board 4 for integrating the above-mentioned signal processing module, processor, ultraviolet lamp module, fluorescence detection circuit and filter amplifier circuit.

[0050] In addition, a wireless communication module and a power management chip may also be integrated on the circuit board 4 .

[0051] The wireless communication module is connected to the processor and the antenna 8 respectively. When the processor determines that the state of the aerator is abnormal, the state signal of the aerator is sent out through the wireless communication module and the antenna 8. The state signal may include a fault signal and a shutdown signal. The power management chip is connected to the power supply and is used to control the power supply to output a current and voltage of a preset frequency and a preset strength.

[0052] When using the above system, the analog audio signal when the aerator is working, the acceleration of the nearby float and the nearby oil concentration are first obtained through the signal acquisition module, and then the state of the aerator is judged from multiple angles through three different data of analog audio signal, acceleration and oil concentration. This can prevent errors that may be caused by a single data detection result and improve the accuracy of aerator state identification. In this way, through multiple groups of detection information and providing multiple fault judgment criteria, the working state of the aerator can be effectively identified and evaluated. The fault detection accuracy is high. Once the aerator fails, it can be discovered in time and accurate solutions can be made, effectively avoiding possible economic losses.

[0053] Secondly, the present invention provides a method for detecting the state of an aerator, specifically as follows Figure 2 As shown, the following steps are included:

[0054] S201, obtaining the analog audio signal generated when the aerator is working, the acceleration of the float near the working area of ​​the aerator, and the fluorescent signal generated by the oil stain under ultraviolet light.

[0055] Specifically, the above-mentioned aerator status detector can be placed near the aerator to obtain the analog audio signal generated when the aerator is working, the acceleration of the float near the working area of ​​the aerator, and the fluorescence signal generated by the oil under ultraviolet light, and convert the acceleration into a first electrical signal and convert the fluorescence signal into a second electrical signal.

[0056] S202, determining the field audio characteristics near the aerator, the change characteristics of the water wave pressure and the oil concentration in the water according to the simulated audio signal, the acceleration and the fluorescent signal.

[0057] Specifically, the analog audio signal is converted into a first digital signal through a signal conversion circuit; the first digital signal is subjected to a real Fourier transform through a signal processing module to obtain field audio characteristics. The first electrical signal is converted into a second digital signal through a signal conversion circuit; the second digital signal is filtered through a signal processing module, and the synthetic acceleration of the float is determined according to the filtered second digital signal, and the real Fourier transform is performed on the filtered second digital signal to obtain the water wave pressure change frequency. The second electrical signal is converted into a third digital signal through a signal conversion circuit; the instrument working curve is determined through a signal processing module, and the third digital signal is converted into the oil pollution concentration in water according to the instrument working curve.

[0058] S203: When the audio characteristics of the field and the frequency of water wave pressure changes are within the corresponding preset fault signal range, or when the oil concentration in the water is greater than or equal to the preset concentration, determine that the aerator is faulty.

[0059] In addition, when the field audio feature is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency, it is determined that the aerator is in a shutdown state.

[0060] In this step, a first preset fault signal range corresponding to the field audio characteristics, a second preset fault signal range corresponding to the synthetic acceleration and water wave pressure change frequency, and a preset concentration can be added to the processor respectively. The processor determines whether the aerator is in an abnormal state based on the field audio characteristics, synthetic acceleration and water wave pressure change frequency, and the oil content in the water.

[0061] In one embodiment, the microphone collects the working status of the aerator to generate an analog audio signal. The analog audio signal is converted into a digital signal by the codec chip and sent to the DSP for processing. A real Fourier transform is performed in the DSP to obtain the field audio characteristics of the aerator in the working state. After obtaining the field audio signal, the stm32 chip makes a judgment: if it is found that there is at least one group of signals less than 45Hz and the noise level exceeds 120dB in the field audio signal, it means that the aerator can work normally, but there is wear and tear of the machine parts, loose parts or foreign objects intrusion. If there is no obvious characteristic signal in the audio signal, it means that the aerator is in a shutdown state.

[0062] The digital three-axis acceleration sensor collects the synthetic acceleration of the float near the working area of ​​the aerator. The acceleration sensor measures the acceleration of the x, y, and z axes, and sums the acceleration information vectors in these three directions to obtain the corresponding synthetic acceleration. In order to improve the accuracy of the signal, the DSP performs filtering by setting the threshold and step frequency to filter out some noise and interference. After that, a real Fourier transform is performed to convert the acceleration signal into a frequency domain signal to obtain the characteristics of the nearby water wave pressure changes when the aerator is working. By analyzing the water wave spectrum, if there is at least one group of signals with a frequency less than (n*r / 60-5) Hz and a combined acceleration less than 7m / s2, it indicates that the aerator may be installed loosely, the impeller is unbalanced, or the motor is faulty. If there is no obvious characteristic signal in the water wave frequency signal, it means that the aerator is in a shutdown state.

[0063] The fluorescence detection circuit is used to collect the surface oil pollution of the water body near the working area of ​​the aerator. Specifically, the oil emits fluorescence under the irradiation of the ultraviolet LED. The fluorescence signal received by the fluorescence detection circuit is then converted into an electrical signal. The electrical signal is converted into a digital signal through analog-to-digital conversion, and the electrical signal is converted into the oil content in the water using the instrument working curve, so as to evaluate the distribution of oil in the water near the working area of ​​the aerator. If the oil content in the water exceeds 10ppm, it indicates that the aerator may have an oil leakage problem.

[0064] This embodiment uses two different data, acceleration and sound, to effectively identify and evaluate the working state of the aerator. The specific method is as follows: first, determine whether a group of signals less than 45Hz and with a level exceeding 120dB appears in the audio signal. If so, it indicates that the aerator can work, but there are problems such as mechanical wear, loose parts or foreign matter intrusion; secondly, check whether the audio signal has no obvious characteristics. If it is determined that there are no obvious characteristics, such as the audio signal that may exist when the aerator is working cannot be detected, it indicates that the aerator is in a shutdown state; thirdly, analyze whether the water fluctuation spectrum signal has a group less than (n*r / 60-5)Hz and an acceleration less than 7m / s2. If so, it indicates that the aerator has problems such as loose installation, unbalanced impeller or motor failure; in addition, observe whether the water fluctuation spectrum has obvious characteristic signals. If not, for example, the water fluctuation spectrum characteristic signals that may exist when the aerator is working cannot be detected, it indicates that the aerator is in a shutdown state; finally, check whether the oil content in the water exceeds 10ppm. If so, it indicates that the aerator has oil leakage. If the above conditions are all no, it means that the aerator is in normal working condition.

[0065] By adopting the above method, the working status of the aerator can be effectively identified and evaluated through three different data: acceleration, sound and oil concentration. The detection information is rich, and a variety of fault judgment criteria are provided. The fault detection accuracy is high. Once the aerator fails, it can be discovered in time and accurate solutions can be made, effectively avoiding possible economic losses.

[0066] The present invention also provides a computer-readable storage medium, which stores a computer program, which can be used to execute the above Figure 2 The steps of the aerator status detection method are provided.

[0067] The present invention also provides a computer device. At the hardware level, the computer device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory. Of course, it may also include hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to achieve the above Figure 2 The steps of the aerator status detection method are provided.

[0068] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0072] It should be noted that the above specific implementation method can enable those skilled in the art to understand the invention more comprehensively, but does not limit the invention in any way. Therefore, although the present invention has been described in detail in this specification, those skilled in the art should understand that the invention can still be modified or replaced by equivalents; and all technical solutions and improvements that do not deviate from the spirit and scope of the invention are included in the protection scope of the patent for the invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An aerator status detection system, characterized in that: The system comprises: A signal acquisition module, used to acquire the analog audio signal generated when the aerator is working and the acceleration of the float near the working area of ​​the aerator, and convert the acceleration into a first electrical signal; The oil pollution detection module is used to obtain the fluorescence signal generated by the oil pollution under ultraviolet light irradiation and convert the fluorescence signal into a second electrical signal; A signal processing module, used to convert the analog audio signal, the first electrical signal and the second electrical signal into corresponding digital signals; extract the field audio characteristics, the change characteristics of the water wave pressure and the oil pollution concentration in the water of the corresponding digital signals; The processor is used to determine that the aerator is faulty when the field audio characteristics and the water wave pressure change frequency are within the corresponding preset fault signal range, or the oil pollution concentration in the water is greater than or equal to the preset concentration.

2. The aerator state detection system according to claim 1, characterized in that: The processor is further configured to determine that the aerator is in a shutdown state when the field audio feature is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency.

3. The aerator state detection system according to claim 1, characterized in that: The signal acquisition module includes a microphone and a three-axis acceleration sensor. The microphone is used to acquire the analog audio signal generated when the aerator is working; the three-axis acceleration sensor is used to acquire the acceleration of the floating ball near the working area of ​​the aerator; The oil pollution detection module includes an ultraviolet lamp and a photodiode.

4. The aerator state detection system according to claim 1, characterized in that: The signal processing module includes a filter amplifier circuit, an audio codec chip and a digital-to-analog converter; The filtering and amplifying circuit is used to filter and enhance the analog audio signal, the first electrical signal and the second electrical signal; The audio codec chip is used to convert the filtered and enhanced analog audio signal into a first digital signal; The digital-to-analog converter is used to convert the first electric signal and the second electric signal after filtering and enhancement into a second digital signal and a third digital signal respectively.

5. The aerator state detection system according to claim 3, characterized in that: The system further comprises: A transparent shell is provided with a circuit board inside, the pickup is provided on the inner wall of the shell, the three-axis acceleration sensor, the ultraviolet lamp and the photodiode are provided at the bottom of the circuit board, the circuit board is provided with a battery compartment; the battery compartment is used to supply power to the system; an antenna for sending a status signal of the aerator is provided at the bottom of the shell; A fixing bracket, arranged on the top of the circuit board; The solar panel is arranged on the top of the fixing bracket and is used to provide electrical energy to the battery compartment.

6. A method for detecting the state of an aerator, characterized in that: The method comprises: Acquire the analog audio signal generated when the aerator is working, the acceleration of the float near the aerator working area, and the fluorescent signal generated by the oil under ultraviolet light; Determine the field audio characteristics near the aerator, the change characteristics of the water wave pressure and the oil pollution concentration in the water according to the simulated audio signal, the acceleration and the fluorescent signal; When the field audio characteristics and the water wave pressure change frequency are within the corresponding preset fault signal range, or the oil pollution concentration in the water is greater than or equal to the preset concentration, it is determined that the aerator is faulty.

7. The aerator state detection method according to claim 6, characterized in that: The method further comprises: When the field audio characteristic is less than a preset audio frequency or the water wave pressure change frequency is less than a preset change frequency, it is determined that the aerator is in a shutdown state.

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