High-precision ship tail gas intelligent telemetering device and method

Abstract

The invention discloses a high-precision ship tail gas intelligent telemetering device and method, and particularly relates to the technical field of ship tail gas telemetering, the high-precision ship tail gas intelligent telemetering device comprises a case, a touch display screen arranged on the front side of the case, two lasers arranged on the inner bottom wall of the case, a common-path optical machine assembly, a gas pool and a tail gas input pipe arranged on the top of the case, a central processing unit is arranged on the inner side wall of the machine box, a flow guiding mechanism is arranged at the top of the gas pool and used for adjusting the flow and the flow direction of tail gas entering the gas pool through a tail gas input pipe, and airflow stirring mechanisms are arranged on the inner bottom wall of the machine box and in the gas pool. The interior of the gas tank is uniformly divided into a plurality of areas, a plurality of gas inlets are uniformly formed in the top of the gas tank, and the device further comprises a gas concentration acquisition module and a gas flow rate acquisition module. The problem that the measurement precision is influenced by tail gas layering is solved, and uniform distribution and accurate measurement of tail gas in the gas cell are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of ship exhaust remote sensing, and more specifically, to a high-precision ship exhaust intelligent remote sensing device and method. Background Art

[0002] Ship exhaust refers to the waste gas generated by the combustion of fuel by the engine during the voyage of the ship, which mainly contains harmful components such as carbon dioxide, nitrogen oxides, sulfur oxides, and particulate matter. With the development of the global shipping industry, ship exhaust has become an important source of air quality and environmental protection. In response to this problem, ship exhaust telemetry technology has emerged. This technology uses remote monitoring methods, sensors and intelligent analysis systems to obtain ship exhaust emission data in real time, and can automatically collect exhaust composition and concentration, reduce errors caused by human intervention, and improve monitoring accuracy. Ship exhaust telemetry can not only help ships comply with environmental regulations and ensure that emissions do not exceed standards, but also support shipowners to optimize the combustion process, improve fuel efficiency and reduce harmful emissions through real-time data analysis, thereby effectively reducing environmental pollution and improving energy efficiency. It also provides strong data support for ship environmental management and further promotes the green development of the shipping industry.

[0003] With the increasing requirements for global environmental protection, real-time monitoring of ship exhaust emissions has become increasingly important. Especially in ship emission control areas (ECAs), accurate monitoring of pollutants such as sulfur dioxide (SO2) and carbon dioxide (CO2) in ship exhaust has become an important means of environmental supervision. In order to achieve high-precision exhaust emission monitoring, tunable laser absorption spectroscopy (TDLAS) has been widely used in recent years. Among them, quantum cascade laser (QCL) has become one of the core technologies in this field because of its excellent laser output characteristics in the mid-infrared band. The laser of a specific wavelength is emitted by a precisely tuned laser, which reacts with the target gas and uses the absorption spectrum to accurately detect the gas concentration. At the same time, combined with the long optical path gas cell design, the gas absorption rate is further improved, thereby enhancing the sensitivity and accuracy of gas component detection. In addition, with the development of intelligent technology, intelligent control systems based on telemetry technology have also provided strong support for real-time data acquisition and automatic analysis.

[0004] The prior art has the following deficiencies: During the operation of the ship exhaust telemetry device, the design of the gas pool usually assumes that the gas in the exhaust can be evenly mixed so that the laser beam can fully react with the gas, thereby accurately measuring the pollutant concentration in the exhaust. However, in the actual environment of ship navigation, the gas flow in the gas pool is affected by many factors, which may cause the exhaust to form a stratified phenomenon in the gas pool. In particular, when the ship accelerates or changes its speed, the airflow turbulence and the local airflow velocity differences will intensify, resulting in the exhaust of different components not being fully mixed, forming a layered structure. In this case, when the laser beam penetrates the gas pool, it may pass through gas layers of different densities, resulting in a decrease in the absorption efficiency of the laser in the gas layer with lower density, thereby failing to achieve effective absorption of all gas molecules. This incomplete absorption will cause the signal intensity received by the laser detector to be unstable, which will cause errors in the measurement of pollutant concentration. The prior art cannot effectively solve this gas stratification problem because they assume that the gas flow is uniform and do not take into account the influence of the flow state on laser absorption. Therefore, the stratification phenomenon in the gas pool directly leads to uneven laser absorption, which increases the instability of the exhaust gas concentration measurement results. The measurement data may fluctuate and even affect the overall system efficiency, causing waste of resources and increasing measurement errors, making it impossible to obtain accurate and stable concentration data.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a high-precision ship exhaust intelligent remote sensing device and method to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-precision ship exhaust intelligent telemetry device comprises a chassis, a touch display screen arranged on the front of the chassis, two lasers arranged on the inner bottom wall of the chassis, a common path optical machine component and a gas pool, and an exhaust gas inlet pipe arranged on the top of the chassis, the inner side wall of the chassis is provided with a central processing unit, the top of the gas pool is provided with a flow guide mechanism, the flow guide mechanism is used to adjust the exhaust gas flow and flow direction entering the gas pool through the exhaust gas inlet pipe, the inner bottom wall of the chassis and the inside of the gas pool are provided with an airflow stirring mechanism, the airflow stirring mechanism is used to break the layered structure of the exhaust gas inside the gas pool, the inside of the gas pool is evenly divided into a plurality of areas, and the top of the gas pool is evenly provided with a plurality of air inlets;

[0009] Also includes:

[0010] The gas concentration acquisition module is provided with a plurality of modules evenly arranged on the inner wall of each area inside the gas pool, and is used to obtain the average concentration of exhaust gas in each area inside the gas pool in real time, and generate the standard deviation of the concentration fluctuation coefficient through the central processor;

[0011] The gas flow rate acquisition module is provided with a plurality of modules evenly arranged on the inner wall of each area inside the gas pool, and is used to obtain the average flow rate of the exhaust gas in each area inside the gas pool in real time, and generate the standard deviation of the flow rate change index through the central processing unit;

[0012] The central processing unit conducts a comprehensive analysis on the generated standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index to generate an evaluation coefficient. The evaluation coefficient is compared with a preset reference threshold of the evaluation coefficient to determine whether a layered structure appears in the exhaust gas inside the gas pool. The working states of the flow guide mechanism and the airflow stirring mechanism are controlled based on the comparison results.

[0013] Preferably, the flow guiding mechanism includes a flow regulating valve, a connecting pipe, an air flow distributor and a plurality of delivery pipes, the input port of the flow regulating valve is fixedly connected to the output port of the exhaust gas input pipe, the output port of the flow regulating valve is fixedly connected to the input port of the air flow distributor through a connecting pipe, a plurality of air outlets are evenly opened at the bottom of the air flow distributor, and each air outlet is fixedly connected to one end of each delivery pipe, and the other end of each delivery pipe is fixedly connected to a plurality of air inlets evenly opened at the top of the gas pool.

[0014] Preferably, the airflow stirring mechanism includes a motor base, a motor, a gear transmission box, a rotating shaft, a stirring blade fixed shaft and a stirring blade, the bottom of the motor base is fixedly connected to the inner bottom wall of the chassis, the top of the motor base is fixedly connected to the bottom of the motor, the output shaft of the motor is drivingly connected to the input shaft of the gear transmission box, the output shaft of the gear transmission box is drivingly connected to one end of the rotating shaft, the outer wall of the rotating shaft is fixedly connected to the inner side wall of the stirring blade fixed shaft, and the outer wall of the stirring blade fixed shaft is fixedly connected to one side of the stirring blade.

[0015] Preferably, the output end of the central processing unit is electrically connected to the input end of the flow regulating valve, the input end of the airflow distributor and the input end of the motor, respectively, and the output end and input end of the airflow concentration acquisition module and the output end and input end of the airflow velocity acquisition module are electrically connected to the input end and output end of the central processing unit, respectively.

[0016] Preferably, the logic for obtaining the standard deviation of the concentration fluctuation coefficient is as follows:

[0017] S1. The gas concentration acquisition module is used to obtain the average exhaust concentration of each area in the gas pool at different times within the time T, and calibrated as represents the average exhaust gas concentration in the i-th region of the gas pool at time m within a time T, i = 1, 2, 3, 4, ..., g, m = 1, 2, 3, 4, ..., t, g and t are both positive integers;

[0018] S2. Calculate the concentration fluctuation coefficient CFC of each area inside the gas pool i The specific calculation process is as follows: First, within a given time T, the concentration value measured at each moment m The average is calculated to obtain the average concentration of each area; then, the difference between the concentration value at each moment and the average concentration is calculated, and these differences are squared and accumulated, and then divided by the number of measurements t to obtain the variance; then the square root of the variance is taken, and the result is exponentially calculated with base e, and finally the concentration fluctuation coefficient CFC of each area is obtained. i ;

[0019] The expression to be calculated is:

[0020]

[0021] In the formula, CFC i is the concentration fluctuation coefficient of the i-th region inside the gas pool;

[0022] S3. Calculate the standard deviation of concentration fluctuation coefficient σ CFC The specific calculation process is as follows: First, calculate the concentration fluctuation coefficient CFC of all g regions in the gas pool i Then, the concentration fluctuation coefficient CFC of each area is calculated i The difference from the mean value is squared, added up, and divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation of the concentration fluctuation coefficient

[0023] σ CFC ;

[0024] The expression to be calculated is:

[0025]

[0026] In the formula, σ CFC is the standard deviation of the concentration fluctuation coefficient.

[0027] Preferably, the logic for obtaining the standard deviation of the flow velocity variation index is:

[0028] S1. The gas flow rate acquisition module is used to obtain the average tail gas flow rate of each area inside the gas pool at different times within the time T, and calibrated as represents the average flow rate of tail gas in the i-th region of the gas pool at time n within a time T, i = 1, 2, 3, 4, ..., g, n = 1, 2, 3, 4, ..., k, g and k are both positive integers;

[0029] S2. Calculate the velocity variation index FVI of each area inside the gas pool i The specific calculation process is as follows: First, for each flow velocity value at time n within time T, Calculate the rate of change between the flow velocity values ​​at two adjacent moments, that is, the flow velocity value at each moment n With the previous moment The absolute value of the difference, divided by Get the relative change value; then, add all these relative change values ​​and divide them by the total number of changes k-1; finally get the flow velocity change index FVI of the i-th area i ;

[0030] The expression to be calculated is:

[0031]

[0032] Where, FVI i is the velocity variation index of the i-th region inside the gas pool;

[0033] S3. Calculate the standard deviation of the velocity variation index σ FVI The specific calculation process is as follows: First, calculate the velocity variation index FVI of all g regions in the gas pool i Then, the flow velocity variation index FVI of each area is calculated. i The difference between the average value and the average value is calculated, and the squares of these differences are added up and then divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation σ of the velocity variation index FVI ;

[0034] The expression to be calculated is:

[0035]

[0036] In the formula, σ FVI is the standard deviation of the flow velocity variation index.

[0037] Preferably, the standard deviation σ of the generated concentration fluctuation coefficient CFC and the standard deviation of the velocity variation index σ FVI Perform a comprehensive analysis and calculate the evaluation coefficient D through weighted summation pg The specific calculation process is as follows: First, the standard deviation of concentration fluctuation coefficient σ CFC The square of the concentration fluctuation coefficient is multiplied by the preset proportional coefficient r1, then added to 1 and the natural logarithm is taken; then, the standard deviation of the flow rate variation index σFVI The square of the flow rate change index is multiplied by the preset proportional coefficient r2; finally, the two calculation results are added and divided by the sum of the proportional coefficients r1 and r2 to obtain the evaluation coefficient D pg , where r1 and r2 are preset proportional coefficients greater than 0;

[0038] The expression formula of the evaluation coefficient is:

[0039] Formula analysis is performed through the central processing unit according to the formula:

[0040]

[0041] Where D pg is the evaluation coefficient, r1 and r2 are the preset proportional coefficients of the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index, respectively, and both r1 and r2 are greater than 0.

[0042] Preferably, the preset evaluation coefficient reference threshold is set to D op , the central processor calculates the evaluation coefficient D pg and the pre-set evaluation coefficient reference threshold D op Compare and judge whether the tail gas inside the gas pool has a layered structure, and control the working state of the flow guide mechanism and the air flow stirring mechanism according to the comparison results. The specific judgment is as follows:

[0043] When the evaluation coefficient D pg Less than or equal to the preset evaluation coefficient reference threshold D op When the tail gas inside the gas pool does not have a layered structure, a normal signal is generated. After receiving the normal signal, the central processing unit generates a holding signal and a standby signal, and transmits the holding signal to the flow control valve and the air flow distributor respectively. After the flow control valve and the air flow distributor receive the holding signal, they control the flow guide mechanism to perform the holding work, and transmit the standby signal to the motor. After receiving the standby signal, the motor controls the air flow stirring mechanism to perform the standby work.

[0044] When the evaluation coefficient D pg Greater than the preset evaluation coefficient reference threshold D op When the exhaust gas inside the gas pool appears in a layered structure, an abnormal signal is generated. After receiving the abnormal signal, the central processing unit generates an adjustment signal and a stirring signal, and transmits the adjustment signal to the flow control valve and the air flow distributor respectively. After the flow control valve and the air flow distributor receive the adjustment signal, they control the flow guide mechanism to perform the adjustment work, and transmit the stirring signal to the motor. After receiving the stirring signal, the motor controls the air flow stirring mechanism to perform the stirring work.

[0045] Preferably, a method for a high-precision ship exhaust intelligent remote sensing device comprises the following steps:

[0046] Step 1: The central processing unit receives the command signal input by the staff on the touch screen, analyzes the received command signal, generates a working signal and a collection signal respectively, and transmits the working signal to the two lasers and the common-path optical-mechanical component respectively. After the two lasers and the common-path optical-mechanical component receive the working signal, the two lasers emit laser beams and share the laser beams through the common-path optical-mechanical component, and inject them into the gas pool to react with the exhaust gas inside it;

[0047] Step 2: The central processing unit transmits the generated acquisition signal to the gas concentration acquisition module and the gas flow rate acquisition module respectively. After receiving the acquisition signal, the gas concentration acquisition module and the gas flow rate acquisition module respectively collect information on the average exhaust concentration and the average exhaust flow rate of each area inside the gas pool, and transmit the collected information to the central processing unit;

[0048] Step 3, the central processing unit receives the information collected by the gas concentration acquisition module and the gas flow rate acquisition module, analyzes them respectively, generates the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate change index, and performs a comprehensive analysis to generate an evaluation coefficient, compares the evaluation coefficient with a preset evaluation coefficient reference threshold, determines whether the tail gas inside the gas pool has a layered structure, and controls the working state of the flow guide mechanism and the airflow stirring mechanism according to the comparison result;

[0049] Step 4. If the evaluation coefficient is less than or equal to the preset evaluation coefficient reference threshold, the exhaust gas inside the gas pool does not show a layered structure, and a normal signal is generated. After the central processing unit receives the normal signal, it generates a holding signal and a standby signal, and transmits the holding signal to the flow control valve and the air flow distributor respectively. After the flow control valve and the air flow distributor receive the holding signal, they control the flow guide mechanism to perform the holding work, and transmit the standby signal to the motor. After the motor receives the standby signal, it controls the air flow stirring mechanism to perform the standby work; if the evaluation coefficient is greater than the preset evaluation coefficient reference threshold, the exhaust gas inside the gas pool shows a layered structure, and an abnormal signal is generated. After receiving the abnormal signal, the central processing unit generates an adjustment signal and a stirring signal, and transmits the adjustment signal to the flow control valve and the air flow distributor respectively. After the flow control valve and the air flow distributor receive the adjustment signal, they control the flow guide mechanism to perform the adjustment work, and transmit the stirring signal to the motor. After the motor receives the stirring signal, it controls the air flow stirring mechanism to perform the stirring work.

[0050] Technical effects and advantages of the present invention:

[0051] 1. The present invention solves the problem of uneven laser absorption caused by exhaust gas stratification in the gas pool by setting a flow guiding mechanism and an airflow stirring mechanism. Specifically, the flow guiding mechanism includes a flow regulating valve, an airflow distributor and a delivery pipe, which can accurately adjust the exhaust gas flow and its distribution entering the gas pool according to the control of the central processing unit. The airflow distributor evenly distributes the regulated exhaust gas to multiple air inlets at the top of the gas pool, so that the exhaust gas is evenly diffused in each area, avoiding the gas concentration caused by a single air inlet. This design ensures that the gas flow direction inside the gas pool is consistent, fundamentally reduces the layered structure of the exhaust gas, and improves the uniformity of laser absorption and the stability of the measurement data.

[0052] 2. The present invention also includes the design of an airflow stirring mechanism to ensure sufficient mixing of the tail gas. The multiple groups of stirring blades in the airflow stirring mechanism can generate strong turbulence in the gas pool, and the gas components in each area are fully mixed by continuously breaking the laminar distribution of the tail gas. In particular, through the combined action of the motor, gear transmission box, rotating shaft and stirring blades, a uniform flow state is formed between different areas, avoiding local flow velocity differences and stratification. This uniform mixing effect improves the absorption efficiency of the laser beam to different gas components, reduces the measurement error, and provides a guarantee for the accuracy and consistency of the tail gas concentration measurement.

[0053] 3. The present invention has strong adaptability and flexibility in technical implementation. The combination of the flow guide mechanism and the air flow stirring mechanism enables the system to adjust the exhaust gas distribution according to different ship speeds and load conditions, ensuring that the exhaust gas concentration can still be accurately measured under complex navigation conditions. In addition, the design of the scheme considers setting up multiple air inlets and stirring blade groups to meet the requirements of different exhaust gas flow rates and gas pool volumes, thereby achieving system flexibility.

[0054] 4. The present invention can monitor the tail gas concentration and flow rate data of each area in the gas pool in real time through the gas concentration acquisition module and the gas flow rate acquisition module, and the central processing unit generates the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate change index to comprehensively analyze the distribution state of the tail gas. When the system evaluation coefficient is less than or equal to the set reference threshold, it indicates that the tail gas in the gas pool is evenly distributed, and the central processing unit controls the flow guide mechanism and the airflow stirring mechanism to enter the holding and standby state to maintain the smooth operation of the system; if the evaluation coefficient exceeds the threshold, the central processing unit controls the flow control valve and the airflow distributor to adjust the tail gas flow, and starts the airflow stirring mechanism at the same time to break the gas layered structure and restore the uniform distribution of the gas. Through this automatic adjustment mechanism, the present invention can quickly respond to the stratification phenomenon in the gas pool, improve the accuracy of the tail gas concentration measurement and the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0056] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0057] Figure 2 This is a schematic diagram of the internal structure of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0058] Figure 3 This is a schematic diagram of the central processor installation structure of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0059] Figure 4 This is a schematic diagram of the laser, common path optical and mechanical components, and gas pool installation structure of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0060] Figure 5 This is a schematic diagram of the installation structure of a gas pool, a flow guide mechanism and an air flow stirring mechanism of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0061] Figure 6 This is a schematic diagram of the installation structure of the exhaust gas inlet pipe and flow guide mechanism of a high-precision ship exhaust gas intelligent remote sensing device proposed by the present invention;

[0062] Figure 7 This is a schematic diagram of the structure of an airflow stirring mechanism of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0063] Figure 8 This is a schematic diagram of the installation structure of a gas concentration acquisition module and a gas flow rate acquisition module of a high-precision ship exhaust intelligent remote sensing device proposed by the present invention;

[0064] Fig. 9 This is a module schematic diagram of a high-precision ship exhaust intelligent remote sensing device and method proposed by the present invention.

[0065] In the figure: 1. Chassis; 2. Touch screen; 3. Laser; 4. Common-path optical-mechanical assembly; 5. Gas pool; 6. Exhaust gas input pipe; 7. Central processing unit; 8. Flow guiding mechanism; 801. Flow regulating valve; 802. Connecting pipe; 803. Air flow distributor; 804. Delivery pipe; 9. Air flow stirring mechanism; 901. Motor base; 902. Motor; 903. Gear transmission box; 904. Rotating shaft; 905. Stirring blade fixing shaft; 906. Stirring blade; 10. Gas concentration acquisition module; 11. Gas flow rate acquisition module. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] like Figure 1-9 As shown, a high-precision ship exhaust intelligent telemetry device includes a chassis 1, a touch screen 2 arranged on the front of the chassis 1, two lasers 3 arranged on the inner bottom wall of the chassis 1, a common path optical machine component 4 and a gas pool 5, and an exhaust gas inlet pipe 6 arranged on the top of the chassis 1, a central processing unit 7 is arranged on the inner wall of the chassis 1, a flow guide mechanism 8 is arranged on the top of the gas pool 5, and the flow guide mechanism 8 is used to adjust the exhaust gas flow and flow direction entering the gas pool 5 through the exhaust gas inlet pipe 6, and the inner bottom wall of the chassis 1 and the gas pool 5 are provided with an airflow stirring mechanism 9, and the airflow stirring mechanism 9 is used to break the layered structure of the exhaust gas inside the gas pool 5, and the inside of the gas pool 5 is evenly divided into a plurality of areas, and a plurality of air inlets are evenly opened on the top of the gas pool 5;

[0068] Also includes:

[0069] The gas concentration acquisition module 10 is provided with a plurality of modules evenly arranged on the inner wall of each area inside the gas pool 5, and is used to obtain the average concentration of the exhaust gas in each area inside the gas pool 5 in real time, and generate the standard deviation of the concentration fluctuation coefficient through the central processor 7;

[0070] It should be noted that the gas concentration acquisition module 10 can be an infrared absorption gas sensor or other equipment that can obtain the average exhaust gas concentration of each area inside the gas pool 5 in real time. The gas concentration acquisition module 10 is not specifically limited here and can be selected according to actual needs.

[0071] The gas flow rate acquisition module 11 is provided with a plurality of modules and is evenly arranged on the inner wall of each area inside the gas pool 5, and is used to obtain the average flow rate of the exhaust gas in each area inside the gas pool 5 in real time, and generate the standard deviation of the flow rate change index through the central processor 7;

[0072] It should be noted that the gas flow rate collection module 11 can be an ultrasonic flow meter or other equipment that can obtain the average exhaust gas flow rate of each area inside the gas pool 5 in real time. The gas flow rate collection module 11 is not specifically limited here and can be selected according to actual needs.

[0073] The central processing unit 7 performs a comprehensive analysis on the generated standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index to generate an evaluation coefficient. The evaluation coefficient is compared with a preset reference threshold of the evaluation coefficient to determine whether a layered structure appears in the exhaust gas inside the gas pool 5, and the working states of the flow guiding mechanism 8 and the airflow stirring mechanism 9 are controlled according to the comparison result.

[0074] The chassis 1 provides structural support and protection for the entire device, and the internal components are fixed and connected through the chassis. The touch screen 2 is located on the front of the chassis for users to view the exhaust concentration data in real time and perform operation control. Two lasers 3 are respectively arranged on the bottom wall of the chassis, and interact with the gas molecules in the exhaust gas by emitting laser beams of specific wavelengths, thereby realizing the measurement of the pollutant concentration in the exhaust gas. The common path optical machine component 4 is used to ensure that the laser beams emitted by the two lasers can strictly share the same path, ensuring the accuracy of the laser optical path and the accuracy of the measurement. The gas pool 5 is used to accommodate the ship exhaust to be measured. The laser beam absorbs the molecules in the exhaust gas in the gas pool, and the gas concentration is calculated by detecting the absorption signal. The exhaust gas inlet pipe 6 is arranged on the top of the chassis, which is responsible for guiding the ship exhaust into the gas pool and ensuring the stability of the exhaust gas flow and flow direction, so as to perform accurate concentration measurement.

[0075] The gas pool 5 is evenly divided into several areas and several air inlets are evenly opened at the top to ensure the uniform distribution of tail gas in the gas pool, solve the problem of gas stratification, and thus improve the accuracy and reliability of tail gas concentration measurement. By dividing the gas pool into multiple areas, each area can independently carry out real-time monitoring of concentration and flow rate, ensuring that the tail gas in different areas can be evenly mixed, avoiding the difference in laser absorption efficiency caused by uneven airflow or stratification. Evenly opening multiple air inlets helps to evenly introduce tail gas at the top of the gas pool, ensure the stable distribution of tail gas flow rate and flow direction, and prevent the local air flow speed from being too fast or too slow, causing uneven gas in the gas pool. This design combines the working mechanism of the flow guide mechanism 8 and the airflow stirring mechanism 9 in our technical solution, and by optimizing the airflow distribution and gas mixing, ensures that the absorption efficiency of the laser beam in the entire gas pool is consistent, thereby ensuring the accuracy of tail gas concentration measurement and avoiding measurement errors caused by uneven airflow. It should be noted that the number of divided areas and the number of opened air inlets are not specifically limited here, and can be selected according to actual needs.

[0076] In this embodiment, the flow guide mechanism 8 includes a flow regulating valve 801, a connecting pipe 802, an air flow distributor 803 and a plurality of delivery pipes 804. The input port of the flow regulating valve 801 is fixedly connected to the output port of the tail gas input pipe 6. The output port of the flow regulating valve 801 is fixedly connected to the input port of the air flow distributor 803 through the connecting pipe 802. A plurality of air outlets are evenly opened at the bottom of the air flow distributor 803, and each air outlet is fixedly connected to one end of each delivery pipe 804. The other end of each delivery pipe 804 is fixedly connected to a plurality of air inlets evenly opened at the top of the gas pool 5.

[0077] In the flow guiding mechanism 8, the flow guiding mechanism 8 is used to adjust the exhaust gas flow and flow direction entering the gas pool 5 through the exhaust gas input pipe 6, and the specific implementation method is as follows: first, the flow regulating valve 801 controls the exhaust gas flow entering the gas pool 5 by connecting with the exhaust gas input pipe 6; the output port of the flow regulating valve 801 is connected to the input port of the air flow distributor 803 through the connecting pipe 802, so as to transmit the regulated exhaust gas flow to the air flow distributor 803; a plurality of air outlets are evenly opened at the bottom of the air flow distributor 803, and through these air outlets, the exhaust gas is evenly distributed to a plurality of delivery pipes 804, and the other end of each delivery pipe 804 is connected to the air inlet at the top of the gas pool 5; in this way, the air flow distributor 803 evenly distributes the exhaust gas to different areas of the gas pool 5, ensures the uniformity of the exhaust gas flow direction, and avoids the gas stratification phenomenon caused by uneven flow or excessive local air flow in the gas pool 5. On the whole, the flow guiding mechanism 8 optimizes the airflow distribution by adjusting and distributing the exhaust gas flow and direction, thereby ensuring the stability and measurement accuracy of the airflow in the gas pool 5, avoiding the difference in laser absorption efficiency caused by uneven airflow, and thus improving the accuracy of exhaust gas concentration measurement.

[0078] The purpose of setting several delivery pipes 804 and evenly opening several air inlets on the top of the gas pool 5 is to ensure the uniform distribution of the tail gas in the gas pool 5, avoid the gas stratification phenomenon, and thus improve the accuracy of laser absorption. Specifically, the setting of several delivery pipes 804 can evenly guide the airflow from the multiple air outlets of the airflow distributor 803 to different areas of the gas pool 5, and each delivery pipe 804 is responsible for delivering the tail gas to a specific area on the top of the gas pool 5. Multiple air inlets are evenly arranged on the top of the gas pool 5, so that the tail gas can be evenly diffused in the gas pool 5, avoiding the phenomenon of concentrated or uneven gas flow. If only a single air inlet is used, it may cause the tail gas flow rate to be too large, the airflow in some areas may be too fast, and the airflow in other areas is too slow, causing gas stratification, reducing the absorption efficiency of the laser beam, thereby affecting the measurement accuracy. Therefore, through several delivery pipes 804 and evenly distributed air inlets, the stability and uniformity of the airflow in the gas pool 5 are ensured, providing an ideal working environment for laser measurement, avoiding the error caused by uneven airflow, and ensuring the accuracy of tail gas concentration measurement. It should be noted that the specific number of the delivery pipes 804 and the air inlets is not specifically limited here and can be selected according to actual needs, but the number of the two must be the same.

[0079] The flow control valve 801 and the air flow distributor 803 play a key role in the flow guide mechanism 8, and work together to ensure the precise control of the flow rate and flow direction of the tail gas when entering the gas pool 5. The flow control valve 801 controls the total flow of the tail gas entering the gas pool 5 by adjusting the air flow in the tail gas input pipe 6. Specifically, the flow control valve 801 adjusts the opening of the valve according to the control signal sent by the central processor 7 to ensure that the tail gas flow is within a predetermined range, so that the tail gas volume in the gas pool 5 can be ensured to be appropriate, and the flow rate changes under different speeds and loads of the ship can be coped with, and a stable inflow can be maintained. The air flow distributor 803 is responsible for further evenly distributing the tail gas to multiple areas based on the tail gas flow adjusted by the flow control valve 801. The multiple air outlets of the air flow distributor 803 convey the air flow to each air inlet at the top of the gas pool 5 through the conveying pipe 804 to ensure the uniform distribution of the tail gas in the gas pool 5. Through this design, the cooperation of the flow regulating valve 801 and the air flow distributor 803 not only realizes the stable control of the exhaust flow rate, but also ensures the uniformity of the exhaust gas flow direction, thereby avoiding uneven airflow or local excessive airflow, effectively avoiding stratification problems in the gas pool 5, ensuring the stable absorption of the laser and improving the accuracy of exhaust gas concentration measurement.

[0080] In this embodiment, the airflow stirring mechanism 9 includes a motor base 901, a motor 902, a gear transmission box 903, a rotating shaft 904, a stirring blade fixed shaft 905 and a stirring blade 906. The bottom of the motor base 901 is fixedly connected to the inner bottom wall of the chassis 1, the top of the motor base 901 is fixedly connected to the bottom of the motor 902, the output shaft of the motor 902 is drivingly connected to the input shaft of the gear transmission box 903, the output shaft of the gear transmission box 903 is drivingly connected to one end of the rotating shaft 904, the outer wall of the rotating shaft 904 is fixedly connected to the inner side wall of the stirring blade fixed shaft 905, and the outer wall of the stirring blade fixed shaft 905 is fixedly connected to one side of the stirring blade 906;

[0081] In the airflow stirring mechanism 9, the airflow stirring mechanism 9 is used to break the layered structure of the tail gas inside the gas pool 5, and the specific implementation method is as follows: the motor 902 of the airflow stirring mechanism is fixedly connected to the chassis 1 through the motor base 901, and the rotational power of the motor 902 is transmitted to the rotating shaft 904 through the mutual cooperation of the gears inside the gear transmission box 903; the rotating shaft 904 drives the stirring blade fixed shaft 905 connected to its outer wall to rotate, and then drives the stirring blade 906 fixed on the stirring blade fixed shaft 905 to rotate; through the rotation of the stirring blade 906, the airflow stirring mechanism 9 generates strong turbulence inside the gas pool 5, breaks the layered structure in the tail gas, and avoids the gas stratification phenomenon caused by uneven flow or local airflow velocity differences. This stirring action ensures that the tail gas in the gas pool 5 is fully mixed, so that the gas components are evenly distributed in each area, improves the absorption efficiency of the laser beam, and ensures the accurate measurement of the tail gas concentration. Through this mechanism, the airflow stirring mechanism 9 can effectively eliminate the layered airflow, ensure the stable flow of the tail gas and the uniformity of the laser absorption, thereby improving the accuracy and reliability of the entire telemetry device.

[0082] It should be noted that the gear transmission box 903 can transmit the rotational kinetic energy output by the motor 902 to the rotating shaft 904 through the cooperation of its internal gears. The specific cooperation method of the internal gears of the gear transmission box 903 is not specifically limited here and can be selected according to actual needs.

[0083] It should be further noted that the airflow stirring mechanism 9 in the present invention is designed as six groups of rotating shaft 904, stirring blade fixed shaft 905 and stirring blade 906, and is evenly arranged inside the gas pool 5, in order to ensure the full stirring and uniform distribution of tail gas in the gas pool 5. By arranging multiple stirring blade 906 groups, uniform turbulence can be produced in each area of ​​the gas pool 5, avoiding local areas where the airflow is too fast or too slow, and preventing the gas from stratification. The rotation of each group of stirring blades 906 can break the layered structure of the gas, so that different gas components such as SO2, CO2, etc. are fully mixed, thereby improving the absorption efficiency of the laser beam, ensuring the accurate measurement of the tail gas concentration. The design of six groups of stirring blades 906 provides uniform and comprehensive coverage for airflow stirring, ensuring that airflow disturbance and mixing can be effectively carried out in different areas, avoiding the measurement error caused by uneven airflow. In addition, although six groups of stirring blades 906 are designed, this number can be adjusted according to actual needs. More groups of stirring blades 906 can provide stronger stirring effects, while a smaller number of groups of stirring blades 906 are suitable for small or low-flow systems, providing flexibility and adaptability, and can be optimized according to different usage requirements.

[0084] In this embodiment, the output end of the central processor 7 is electrically connected to the input end of the flow control valve 801, the input end of the air flow distributor 803 and the input end of the motor 902, and the output end and input end of the air flow concentration acquisition module 10 and the output end and input end of the air flow velocity acquisition module 11 are electrically connected to the input end and output end of the central processor 7 respectively;

[0085] It should be noted that electrical connection refers to the process of transmitting electric current from one part of an electronic device or circuit to another part through conductive materials or conductive elements. This connection is a key component of the operation of electronic devices and circuits. It ensures the effective transmission and connection of electron flow in electronic devices. Electrical connection can be made using wires. The electrical connection method between the central processing unit 7 and the flow control valve 801, the airflow distributor 803, the motor 902, the airflow concentration acquisition module 10 and the airflow velocity acquisition module 11 is not specifically limited and can be selected according to actual needs.

[0086] During the operation of the ship exhaust telemetry device, the design of the gas pool 5 usually assumes that the gas in the exhaust can be evenly mixed so that the laser beam can fully react with the gas, thereby accurately measuring the pollutant concentration in the exhaust. However, in the actual environment of ship navigation, the gas flow in the gas pool 5 is affected by many factors, which may cause the exhaust to form a stratified phenomenon in the gas pool 5. In particular, when the ship accelerates or changes its speed, the airflow turbulence and the local airflow velocity differences will intensify, resulting in the exhaust of different components not being fully mixed to form a layered structure. In this case, when the laser beam penetrates the gas pool 5, it may pass through gas layers of different densities, resulting in a decrease in the absorption efficiency of the laser in the gas layer with lower density, thereby failing to achieve effective absorption of all gas molecules. This incomplete absorption will cause the signal intensity received by the laser detector to be unstable, which will cause errors in the measurement of pollutant concentration. The existing technologies cannot effectively solve this gas stratification problem because they assume that the gas flow is uniform and do not take into account the influence of the flow state on laser absorption. Therefore, the stratification phenomenon in the gas pool 5 directly leads to uneven laser absorption, which increases the instability of the exhaust gas concentration measurement results, and the measurement data may fluctuate, and even affect the overall system efficiency, resulting in a waste of resources and an increase in measurement errors, making it impossible to obtain accurate and stable concentration data. Therefore, in order to ensure that there is no exhaust gas stratification phenomenon and a layered structure inside the gas pool 5, it is necessary to monitor the exhaust gas inside the gas pool 5 in real time, and control the working state of the relevant mechanism according to the monitoring results to ensure that the exhaust gas in the gas pool 5 is always in a uniformly distributed state, thereby effectively avoiding the occurrence of exhaust gas stratification. This design ensures that the exhaust gas in the gas pool 5 is always in a uniformly distributed state, improves the absorption efficiency of the laser beam, ensures the stability and accuracy of the exhaust gas concentration measurement, significantly reduces the measurement error, and improves the efficiency and reliability of the overall system.

[0087] In this embodiment, the standard deviation of the concentration fluctuation coefficient refers to the degree of fluctuation of the average exhaust gas concentration in each area inside the gas pool 5 over a period of time. If the degree of fluctuation is greater, the standard deviation of the concentration fluctuation coefficient is greater, which means that there are obvious differences in the exhaust gas concentration between the various areas inside the gas pool 5, and a gas stratified structure may be formed. This stratification will cause the absorption efficiency of the laser beam in different concentration layers to be inconsistent, thereby affecting the accuracy of the exhaust gas concentration measurement. When the standard deviation of the concentration fluctuation coefficient increases, it indicates that the gas in the gas pool 5 has not been evenly mixed and there is a large concentration difference. By monitoring the size of the standard deviation of the concentration fluctuation coefficient, the equipment can determine whether a layered structure appears inside the gas pool 5. Once it exceeds the preset threshold, the system will trigger the adjustment mechanism to control the working state of the airflow stirring mechanism 9 and the flow guiding mechanism 8 to ensure that the gas in the gas pool 5 is evenly distributed, so as to improve the stability and accuracy of the measurement;

[0088] The logic for obtaining the standard deviation of the concentration fluctuation coefficient is as follows:

[0089] S1. The gas concentration acquisition module 10 is used to obtain the average exhaust gas concentration of each area inside the gas pool 5 at different times within the time T, and calibrated as represents the average exhaust gas concentration of the i-th region inside the gas pool 5 at time m during a time T, i=1, 2, 3, 4, ..., g, m=1, 2, 3, 4, ..., t, g and t are both positive integers;

[0090] S2. Calculate the concentration fluctuation coefficient CFC of each area inside the gas pool 5 i The specific calculation process is as follows: First, within a given time T, the concentration value measured at each moment m The average is calculated to obtain the average concentration of each area; then, the difference between the concentration value at each moment and the average concentration is calculated, and these differences are squared and accumulated, and then divided by the number of measurements t to obtain the variance; then the square root of the variance is taken, and the result is exponentially calculated with base e, and finally the concentration fluctuation coefficient CFC of each area is obtained. i ;

[0091] The expression to be calculated is:

[0092]

[0093] In the formula, CFC i is the concentration fluctuation coefficient of the i-th region inside the gas pool 5;

[0094] S3. Calculate the standard deviation of concentration fluctuation coefficient σ CFC The specific calculation process is as follows: First, calculate the concentration fluctuation coefficient CFC of all g regions in the gas pool 5 i Then, the concentration fluctuation coefficient CFC of each area is calculated i The difference from the mean value is squared, added up, and divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation σ of the concentration fluctuation coefficient CFC ;

[0095] The expression to be calculated is:

[0096]

[0097] In the formula, σ CFC is the standard deviation of the concentration fluctuation coefficient.

[0098] In this embodiment, the standard deviation of the flow rate variation index refers to the degree of change in the average exhaust gas flow rate of each area inside the gas pool 5 at different times within a period of time. If the degree of change is greater, the standard deviation of the flow rate variation index is greater, which means that the airflow velocity in each area of ​​the gas pool 5 is not uniform, and there are significant flow velocity fluctuations at different times, indicating that the gas may not be evenly distributed and form a layered structure. In this case, different components of the exhaust gas such as SO2, CO2, etc. may gather in specific areas, resulting in inconsistent absorption efficiency of the laser beam when passing through the gas pool 5, affecting the stability and accuracy of the measurement. Therefore, by monitoring the standard deviation of the flow rate variation index, it can be determined whether a layered structure appears in the gas pool 5; when the standard deviation exceeds the set threshold, the system can judge that the gas is unevenly distributed, thereby triggering the airflow stirring mechanism 9 and the flow guiding mechanism 8 to make corresponding adjustments to ensure uniform distribution of the exhaust gas and improve the accuracy and reliability of the measurement;

[0099] The logic for obtaining the standard deviation of the flow velocity variation index is:

[0100] S1, the average tail gas flow rate of each area inside the gas pool 5 at different times within the time T is obtained by the gas flow rate acquisition module 11, and calibrated as represents the average flow rate of the tail gas in the i-th region of the gas pool 5 at time n within a time T, i=1, 2, 3, 4, ..., g, n=1, 2, 3, 4, ..., k, g and k are both positive integers;

[0101] S2. Calculate the flow velocity variation index FVI of each area inside the gas pool 5 i The specific calculation process is as follows: First, for each flow velocity value at time n within time T, Calculate the rate of change between the flow velocity values ​​at two adjacent moments, that is, the flow velocity value at each moment n With the previous moment The absolute value of the difference, divided by Get the relative change value; then, add all these relative change values ​​and divide them by the total number of changes k-1; finally get the flow velocity change index FVI of the i-th area i ;

[0102] The expression to be calculated is:

[0103]

[0104] Where, FVI i is the flow velocity variation index of the i-th region inside the gas pool 5;

[0105] S3. Calculate the standard deviation of the velocity variation index σ FVIThe specific calculation process is as follows: First, calculate the velocity variation index FVI of all g regions in the gas pool 5 i Then, the flow velocity variation index FVI of each area is calculated. i The difference between the average value and the average value is calculated, and the squares of these differences are added up and then divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation σ of the velocity variation index FVI ;

[0106] The expression to be calculated is:

[0107]

[0108] In the formula, σ FVI is the standard deviation of the flow velocity variation index.

[0109] In this embodiment, the standard deviation of the concentration fluctuation coefficient σ is generated. CFC and the standard deviation of the velocity variation index σ FVI Perform a comprehensive analysis and calculate the evaluation coefficient D through weighted summation pg The specific calculation process is as follows: First, the standard deviation of concentration fluctuation coefficient σ CFC The square of the concentration fluctuation coefficient is multiplied by the preset proportional coefficient r1, then added to 1 and the natural logarithm is taken; then, the standard deviation of the flow rate variation index σ FVI The square of the flow rate change index is multiplied by the preset proportional coefficient r2; finally, the two calculation results are added and divided by the sum of the proportional coefficients r1 and r2 to obtain the evaluation coefficient D pg , where r1 and r2 are preset proportional coefficients greater than 0;

[0110] The expression formula of the evaluation coefficient is:

[0111] σ CFC and σ FVI After dimensionless processing, the central processing unit 7 performs a formula analysis according to the formula:

[0112]

[0113] Where D pg is the evaluation coefficient, r 1 and r2 are preset proportional coefficients of the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index, respectively, and both r1 and r2 are greater than 0;

[0114] From the calculated expression, it can be seen that the larger the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index are, the larger the evaluation coefficient D is. pg the bigger it is;

[0115] It should be noted that dimensionlessization is a process of expressing physical quantities in dimensionless form. This method can eliminate the influence of units on physical problems, making the problems more concise and universal. The preset proportional coefficients r1 and r2 of the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate variation index are intended to more flexibly adapt to different working conditions and environmental changes in actual monitoring. These deviation coefficients can be adjusted according to specific circumstances to improve the performance and applicability of the monitoring system.

[0116] In this embodiment, the preset evaluation coefficient reference threshold is set to D op The central processing unit 7 calculates the evaluation coefficient D pg and the pre-set evaluation coefficient reference threshold D op Compare and judge whether the tail gas inside the gas pool 5 has a layered structure, and control the working state of the flow guide mechanism 8 and the air flow stirring mechanism 9 according to the comparison result. The specific judgment is as follows:

[0117] When the evaluation coefficient D pg Less than or equal to the preset evaluation coefficient reference threshold d op When D pg ≤D op When the tail gas inside the gas pool 5 does not have a layered structure, a normal signal is generated. After receiving the normal signal, the central processing unit 7 generates a holding signal and a standby signal, and transmits the holding signal to the flow regulating valve 801 and the air flow distributor 803 respectively. After the flow regulating valve 801 and the air flow distributor 803 receive the holding signal, they control the flow guiding mechanism 8 to perform the holding work, and transmit the standby signal to the motor 902. After receiving the standby signal, the motor 902 controls the air flow stirring mechanism 9 to perform the standby work;

[0118] Maintaining operation means that after receiving the holding signal, the flow control valve 801 and the airflow distributor 803 will maintain the stable input and uniform distribution of the airflow under the existing opening and flow distribution settings without any changes. This ensures that when the exhaust gas stratification does not occur in the gas pool 5, the exhaust gas flow and flow direction remain consistent, thereby maintaining the stability of the laser absorption effect and avoiding fluctuations caused by unnecessary flow adjustments. That is, the flow guide mechanism 8 is controlled to maintain operation. This mode enables the system to smoothly monitor the exhaust gas concentration under normal operating conditions without frequent switching, saving energy and extending the service life of the equipment.

[0119] Standby operation means that after receiving the standby signal, the motor 902 does not work, that is, does not output rotational kinetic energy, the airflow stirring mechanism 9 temporarily remains stationary, and the stirring blade 906 stops rotating, thereby stopping disturbing the gas inside the gas pool 5. This standby mode is effective when the tail gas in the gas pool 5 is evenly distributed and there is no stratification phenomenon, avoiding unnecessary stirring operations, reducing energy consumption, and reducing mechanical wear of the equipment.

[0120] When the evaluation coefficient D pg Greater than the preset evaluation coefficient reference threshold D op When D pg >D op When the exhaust gas inside the gas pool 5 appears in a layered structure, an abnormal signal is generated. After receiving the abnormal signal, the central processing unit 7 generates an adjustment signal and a stirring signal, and transmits the adjustment signal to the flow regulating valve 801 and the air flow distributor 803 respectively. After the flow regulating valve 801 and the air flow distributor 803 receive the adjustment signal, they control the flow guiding mechanism 8 to perform the adjustment work, and transmit the stirring signal to the motor 902. After receiving the stirring signal, the motor 902 controls the air flow stirring mechanism 9 to perform the stirring work.

[0121] The regulation work means that the flow regulating valve 801 and the air flow distributor 803 start to respond after receiving the regulation signal. When the flow regulating valve 801 receives the regulation signal, the opening of its valve is adjusted accordingly to control the total flow of tail gas entering the gas pool 5. At this time, the output port of the flow regulating valve 801 transmits the regulated tail gas to the air flow distributor 803 through the connecting pipe 802, and the air outlets evenly arranged at the bottom of the air flow distributor 803 divert the tail gas to multiple delivery pipes 804. According to the instruction of the regulation signal, the air flow distributor 803 changes the diversion ratio of each air outlet, evenly introduces the tail gas into each air inlet at the top of the gas pool 5, and adjusts the balance of the flow through each air inlet, thereby effectively reducing the layered distribution of the tail gas and improving the uniform mixing effect of the gas.

[0122] The stirring operation means that after the motor 902 receives the stirring signal, the stirring blade 906 is driven to rotate by the motor 902 to break the stratification phenomenon in the gas pool 5. Specifically, the motor 902 is installed on the motor base 901, and transmits the rotational power to the gear transmission box 903 through its output shaft. The gear transmission box 903 amplifies the power of the motor 902 and transmits it to the rotating shaft 904, and the rotating shaft 904 drives the stirring blade fixed shaft 905 and the stirring blade 906 thereon to rotate. The stirring blade 906 is evenly distributed in various areas in the gas pool 5. When rotating, it generates strong turbulence in the gas pool 5, stirs the exhaust gas, and makes the gas in each area fully mixed, thereby eliminating the stratified structure caused by the local flow velocity difference, ensuring the stability of the laser absorption efficiency, and improving the measurement accuracy of the exhaust gas concentration.

[0123] A method for a high-precision ship exhaust intelligent remote sensing device comprises the following steps:

[0124] Step 1, the central processor 7 receives the command signal input by the staff on the touch screen 2, analyzes the received command signal, generates a working signal and a collection signal respectively, and transmits the working signal to the two lasers 3 and the common path optical machine component 4 respectively. After the two lasers 3 and the common path optical machine component 4 receive the working signal, the two lasers 3 emit laser beams and share the laser beams through the common path optical machine component 4, and inject them into the gas pool 5 to react with the exhaust gas inside it;

[0125] Step 2, the central processing unit 7 transmits the generated acquisition signal to the gas concentration acquisition module 10 and the gas flow rate acquisition module 11 respectively. After receiving the acquisition signal, the gas concentration acquisition module 10 and the gas flow rate acquisition module 11 respectively collect information on the average exhaust gas concentration and the average exhaust gas flow rate of each area inside the gas pool 5, and transmit the collected information to the central processing unit 7;

[0126] Step 3, the central processing unit 7 receives the information collected by the gas concentration acquisition module 10 and the gas flow rate acquisition module 11, analyzes them respectively, generates the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate change index, and performs a comprehensive analysis to generate an evaluation coefficient, compares the evaluation coefficient with a preset evaluation coefficient reference threshold, determines whether the tail gas inside the gas pool 5 has a layered structure, and controls the working state of the flow guide mechanism 8 and the airflow stirring mechanism 9 according to the comparison result;

[0127] Step 4: If the evaluation coefficient is less than or equal to the preset evaluation coefficient reference threshold, the tail gas inside the gas pool 5 does not have a layered structure, and a normal signal is generated. After receiving the normal signal, the central processing unit 7 generates a holding signal and a standby signal, and transmits the holding signal to the flow regulating valve 801 and the air flow distributor 803 respectively. After the flow regulating valve 801 and the air flow distributor 803 receive the holding signal, the flow guiding mechanism 8 is controlled to perform the holding work, and the standby signal is transmitted to the motor 902. After the motor 902 receives the standby signal, the air flow stirring mechanism 9 is controlled to perform the standby work; if the evaluation coefficient is greater than the preset evaluation coefficient reference threshold, the tail gas inside the gas pool 5 has a layered structure, and an abnormal signal is generated. After receiving the abnormal signal, the central processing unit 7 generates an adjustment signal and a stirring signal, and transmits the adjustment signal to the flow regulating valve 801 and the air flow distributor 803 respectively. After the flow regulating valve 801 and the air flow distributor 803 receive the adjustment signal, the flow guiding mechanism 8 is controlled to perform the adjustment work, and the stirring signal is transmitted to the motor 902. After the motor 902 receives the stirring signal, the air flow stirring mechanism 9 is controlled to perform the stirring work.

[0128] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0129] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0130] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0131] In the several embodiments provided in the present application, it should be understood that the disclosed overall system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another overall system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0132] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0134] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high-precision ship exhaust intelligent remote sensing device, comprising a chassis (1), a touch screen (2) arranged on the front of the chassis (1), two lasers (3) arranged on the inner bottom wall of the chassis (1), a common path optical machine component (4) and a gas pool (5), and an exhaust gas inlet pipe (6) arranged on the top of the chassis (1), characterized in that: The inner wall of the case (1) is provided with a central processing unit (7); the top of the gas pool (5) is provided with a flow guide mechanism (8), the flow guide mechanism (8) is used to adjust the flow rate and flow direction of the exhaust gas entering the gas pool (5) through the exhaust gas inlet pipe (6); the inner bottom wall of the case (1) and the inside of the gas pool (5) are provided with an air flow stirring mechanism (9), the air flow stirring mechanism (9) is used to break the layered structure of the exhaust gas inside the gas pool (5); the inside of the gas pool (5) is evenly divided into a plurality of areas, and the top of the gas pool (5) is evenly provided with a plurality of air inlets; Also includes: A gas concentration acquisition module (10) is provided with a plurality of modules which are evenly arranged on the inner wall of each area inside the gas pool (5), and is used to obtain the average concentration of exhaust gas in each area inside the gas pool (5) in real time, and generate a standard deviation of the concentration fluctuation coefficient through the central processor (7); A gas flow rate acquisition module (11) is provided with a plurality of modules which are evenly arranged on the inner wall of each area inside the gas pool (5), and is used to obtain the average flow rate of the exhaust gas in each area inside the gas pool (5) in real time, and generate a standard deviation of the flow rate variation index through the central processor (7); The central processing unit (7) performs a comprehensive analysis on the generated concentration fluctuation coefficient standard deviation and the flow rate variation index standard deviation to generate an evaluation coefficient. The evaluation coefficient is compared with a preset evaluation coefficient reference threshold to determine whether the exhaust gas inside the gas pool (5) has a layered structure, and the working states of the flow guide mechanism (8) and the airflow stirring mechanism (9) are controlled according to the comparison result.

2. A high-precision ship exhaust intelligent remote sensing device according to claim 1, characterized in that: The flow guiding mechanism (8) comprises a flow regulating valve (801), a connecting pipe (802), an air flow distributor (803) and a plurality of delivery pipes (804); the input port of the flow regulating valve (801) is fixedly connected to the output port of the exhaust gas input pipe (6); the output port of the flow regulating valve (801) is fixedly connected to the input port of the air flow distributor (803) via the connecting pipe (802); a plurality of air outlets are evenly arranged at the bottom of the air flow distributor (803), and each air outlet is fixedly connected to one end of each delivery pipe (804); and the other end of each delivery pipe (804) is fixedly connected to a plurality of air inlets evenly arranged at the top of the gas pool (5).

3. A high-precision ship exhaust intelligent remote sensing device according to claim 2, characterized in that: The airflow stirring mechanism (9) comprises a motor base (901), a motor (902), a gear transmission box (903), a rotating shaft (904), a stirring blade fixed shaft (905) and a stirring blade (906); the bottom of the motor base (901) is fixedly connected to the inner bottom wall of the chassis (1); the top of the motor base (901) is fixedly connected to the bottom of the motor (902); the output shaft of the motor (902) is drivingly connected to the input shaft of the gear transmission box (903); the output shaft of the gear transmission box (903) is drivingly connected to one end of the rotating shaft (904); the outer wall of the rotating shaft (904) is fixedly connected to the inner side wall of the stirring blade fixed shaft (905); and the outer wall of the stirring blade fixed shaft (905) is fixedly connected to one side of the stirring blade (906).

4. A high-precision ship exhaust intelligent remote sensing device according to claim 3, characterized in that: The output end of the central processing unit (7) is electrically connected to the input end of the flow control valve (801), the input end of the air flow distributor (803) and the input end of the motor (902), respectively; the output end and input end of the air flow concentration acquisition module (10) and the output end and input end of the air flow velocity acquisition module (11) are electrically connected to the input end and output end of the central processing unit (7), respectively.

5. A high-precision ship exhaust intelligent remote sensing device according to claim 4, characterized in that: The logic for obtaining the standard deviation of the concentration fluctuation coefficient is as follows: S1. The average exhaust gas concentration of each area in the gas pool (5) at different times within a time T is obtained through a gas concentration acquisition module (10), and calibrated as represents the average exhaust gas concentration in the i-th region of the gas pool (5) at time m during a time T, i=1, 2, 3, 4, ..., g, m=1, 2, 3, 4, ..., t, g and t are both positive integers; S2. Calculate the concentration fluctuation coefficient CFC of each area inside the gas pool (5) i The specific calculation process is as follows: First, within a given time T, the concentration value measured at each moment m is The average is calculated to obtain the average concentration of each area; then, the difference between the concentration value at each moment and the average concentration is calculated, and these differences are squared and accumulated, and then divided by the number of measurements t to obtain the variance; then the square root of the variance is taken, and the result is exponentially calculated with base e, and finally the concentration fluctuation coefficient CFC of each area is obtained. i ; S3. Calculate the standard deviation of concentration fluctuation coefficient σ CFC The specific calculation process is as follows: First, calculate the concentration fluctuation coefficient CFC of all g regions in the gas pool (5) i Then, the concentration fluctuation coefficient CFC of each area is calculated i The difference from the mean value is squared, added up, and divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation σ of the concentration fluctuation coefficient CFC .

6. A high-precision ship exhaust intelligent remote sensing device according to claim 5, characterized in that: The acquisition logic of the flow velocity variation index standard deviation is: S1. The average tail gas flow rate of each area inside the gas pool (5) at different times within the time T is obtained through the gas flow rate acquisition module (11), and calibrated as represents the average flow rate of the exhaust gas in the i-th area inside the gas pool (5) at time n during a time T, i=1, 2, 3, 4, ..., g, n=1, 2, 3, 4, ..., k, g and k are both positive integers; S2. Calculate the flow velocity variation index FVI of each area inside the gas pool (5) i The specific calculation process is as follows: First, for each flow velocity value at time n within time T, Calculate the rate of change between the flow velocity values ​​at two adjacent moments, that is, the flow velocity value at each moment n With the previous moment The absolute value of the difference, divided by Get the relative change value; Then, all these relative change values ​​are added together and divided by the total number of changes k-1; finally, the flow velocity change index FVI of the i-th area is obtained. i ; S3. Calculate the standard deviation of the velocity variation index σ FVI The specific calculation process is as follows: First, calculate the velocity variation index FVI of all g regions in the gas pool (5) i Then, the flow velocity variation index FVI of each area is calculated. i The difference between the average value and the average value is calculated, and the squares of these differences are added up and then divided by the number of regions g; finally, the square root of the result is taken to obtain the standard deviation σ of the velocity variation index FVI .

7. A high-precision ship exhaust intelligent remote sensing device according to claim 6, characterized in that: The standard deviation of the generated concentration fluctuation coefficient σ CFC and the standard deviation of the velocity variation index σ FVI Perform a comprehensive analysis and calculate the evaluation coefficient D through weighted summation pg The specific calculation process is as follows: First, the standard deviation of concentration fluctuation coefficient σ CFC The square of the concentration fluctuation coefficient is multiplied by the preset proportional coefficient r1, then added to 1 and the natural logarithm is taken; then, the standard deviation of the flow rate variation index σ FVI The square of the flow rate change index is multiplied by the preset proportional coefficient r2; finally, the two calculation results are added and divided by the sum of the proportional coefficients r1 and r2 to obtain the evaluation coefficient D pg , where r1 and r2 are preset proportional coefficients greater than 0.

8. A high-precision ship exhaust intelligent remote sensing device according to claim 7, characterized in that: Set the preset evaluation coefficient reference threshold to D op , the evaluation coefficient D calculated by the central processing unit (7) pg and the pre-set evaluation coefficient reference threshold D op A comparison is performed to determine whether the tail gas inside the gas pool (5) has a layered structure, and the working state of the flow guide mechanism (8) and the air flow stirring mechanism (9) is controlled according to the comparison result. The specific determination is as follows: When the evaluation coefficient D pg Less than or equal to the preset evaluation coefficient reference threshold D op When the tail gas in the gas pool (5) does not have a layered structure, a normal signal is generated. After receiving the normal signal, the central processing unit (7) generates a holding signal and a standby signal, and transmits the holding signal to the flow regulating valve (801) and the air flow distributor (803) respectively. After receiving the holding signal, the flow regulating valve (801) and the air flow distributor (803) control the flow guiding mechanism (8) to perform a holding operation, and transmit the standby signal to the motor (902). After receiving the standby signal, the motor (902) controls the air flow stirring mechanism (9) to perform a standby operation. When the evaluation coefficient D pg Greater than the preset evaluation coefficient reference threshold D op When the exhaust gas inside the gas pool (5) has a layered structure, an abnormal signal is generated. After receiving the abnormal signal, the central processing unit (7) generates a regulation signal and a stirring signal, and transmits the regulation signal to the flow regulating valve (801) and the air flow distributor (803) respectively. After receiving the regulation signal, the flow regulating valve (801) and the air flow distributor (803) control the flow guiding mechanism (8) to perform regulation work, and transmit the stirring signal to the motor (902). After receiving the stirring signal, the motor (902) controls the air flow stirring mechanism (9) to perform stirring work.

9. A method based on the high-precision ship exhaust intelligent remote sensing device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, the central processing unit (7) receives the command signal input by the staff on the touch screen (2), analyzes the received command signal, generates a working signal and a collection signal respectively, and transmits the working signal to the two lasers (3) and the common path optical machine component (4) respectively. After the two lasers (3) and the common path optical machine component (4) receive the working signal, the two lasers (3) emit laser beams and share the laser beams through the common path optical machine component (4), and inject them into the gas pool (5) to react with the exhaust gas therein; Step 2: The central processing unit (7) transmits the generated acquisition signals to the gas concentration acquisition module (10) and the gas flow rate acquisition module (11) respectively. After receiving the acquisition signals, the gas concentration acquisition module (10) and the gas flow rate acquisition module (11) respectively collect information on the average concentration and average flow rate of the exhaust gas in each area inside the gas pool (5), and transmit the collected information to the central processing unit (7); Step 3, the central processing unit (7) receives the information collected by the gas concentration acquisition module (10) and the gas flow rate acquisition module (11), analyzes them respectively, generates the standard deviation of the concentration fluctuation coefficient and the standard deviation of the flow rate change index, and performs a comprehensive analysis to generate an evaluation coefficient, compares the evaluation coefficient with a preset evaluation coefficient reference threshold, determines whether the tail gas inside the gas pool (5) has a layered structure, and controls the working state of the flow guide mechanism (8) and the airflow stirring mechanism (9) according to the comparison result; Step 4: If the evaluation coefficient is less than or equal to the preset evaluation coefficient reference threshold value, the tail gas inside the gas pool (5) does not have a layered structure, and a normal signal is generated. After receiving the normal signal, the central processing unit (7) generates a holding signal and a standby signal, and transmits the holding signal to the flow control valve (801) and the air flow distributor (803) respectively. After receiving the holding signal, the flow control valve (801) and the air flow distributor (803) control the flow guide mechanism (8) to perform the holding operation, and transmit the standby signal to the motor (902). After receiving the standby signal, the motor (902) controls the air flow stirring mechanism (9) to perform the standby operation. The machine works; if the evaluation coefficient is greater than a preset evaluation coefficient reference threshold, the exhaust gas inside the gas pool (5) has a layered structure, and an abnormal signal is generated. After receiving the abnormal signal, the central processing unit (7) generates an adjustment signal and a stirring signal, and transmits the adjustment signal to the flow control valve (801) and the air flow distributor (803) respectively. After receiving the adjustment signal, the flow control valve (801) and the air flow distributor (803) control the flow guide mechanism (8) to perform the adjustment work, and transmit the stirring signal to the motor (902). After receiving the stirring signal, the motor (902) controls the air flow stirring mechanism (9) to perform the stirring work.

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