Intelligent telemetering system and method for ship tail gas

Abstract

The invention relates to the technical field of intelligent telemetering, and discloses an intelligent telemetering system and method for ship tail gas, and the system comprises a signal generation module, a first laser driving module, a first laser, a second laser driving module, a second laser, a common-path optical machine assembly, a gas pool, a detector, and a processing module. According to the system, the gas pool is introduced to detect the concentration of the ship tail gas, and the first detection light corresponding to the first detection gas and the second detection light corresponding to the second detection gas are reflected for multiple times in the gas pool, so that the optical path is prolonged by multiple times; this means that the interaction distance between the first detection light and the first detection gas and the interaction distance between the second detection light and the second detection gas are also correspondingly extended. According to the Lambert-Beer absorption law, the absorption degree is in direct proportion to the optical path length, so that the longer optical path can enhance the detection capability of low-concentration gas components. Therefore, the sensitivity of the monitoring system is improved, and the accuracy of the ship tail gas concentration is improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent telemetry technology, and in particular to a ship exhaust intelligent telemetry system and method. Background Art

[0002] Intelligent telemetry technology is a technology that uses sensors, data acquisition, communication and analysis technologies to monitor, manage and analyze targets in real time. The application of intelligent telemetry technology in ship exhaust monitoring can reduce the degree of environmental pollution caused by ship exhaust emissions.

[0003] However, the concentration obtained by the existing method for monitoring the concentration of ship exhaust components has low accuracy. Therefore, how to improve the accuracy of monitoring the concentration of ship exhaust components has become an urgent problem to be solved. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a ship exhaust intelligent remote sensing system and method, which improves the accuracy of monitoring the concentration of ship exhaust components.

[0005] The present invention provides a ship exhaust intelligent telemetry system, which includes a signal generating module, a first laser driving module, a first laser, a second laser driving module, a second laser, a common path optical machine component, a gas pool, a detector and a processing module, wherein the signal generating module includes a first signal generating end and a second signal generating end, and the signal generating module is used to generate a reference signal for measuring and analyzing ship exhaust components, and the ship exhaust components include a first detection gas and a second detection gas; the first laser driving module includes a first input end and a first output end, and the first input end is connected to the first signal generating end; the first output end is connected to the first laser, and the first laser is excited to generate a first detection light corresponding to the first detection gas; the second laser driving module includes a second input end and a second output end, and the second input end is connected to the second signal generating end. end; the second output end is connected to the second laser, and the second laser is excited to emit a second detection light corresponding to the second detection gas; after the first detection light and the second detection light pass through the common-path optical-mechanical component, the optical axis of the first detection light and the optical axis of the second detection light coincide with each other; the first detection light and the second detection light with coincident optical axes are emitted after multiple reflections in the gas pool; the detector is used to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and obtain a first electrical signal corresponding to the first detection light based on optical information of the first detection light, and obtain a second electrical signal corresponding to the second detection light based on optical information of the second detection light; the processing module is connected to the detector, and is used to obtain the detection concentration of the first detection gas based on the first electrical signal and after concentration inversion processing, and to obtain the detection concentration of the second detection gas based on the second electrical signal and after concentration inversion processing.

[0006] In some implementations, the gas pool includes a Herriott long optical path gas pool, which includes two spherical reflectors arranged at intervals, with the convex surface of the spherical reflector facing away from the other spherical reflector, and a through hole is arranged at the center of one of the spherical reflectors, and the first detection light and the second detection light with overlapping optical axes are incident through the hole, and are reflected multiple times in the Herriott long optical path gas pool and then emitted through the hole.

[0007] In some implementations, the gas cell includes a YL-76 type optical multi-pass absorption cell, and the YL-76 type optical multi-pass absorption cell includes two semicircular reflectors and a circular reflector that are sequentially spaced apart.

[0008] In some implementations, the semicircular reflector and the circular reflector both include a stacked silver film and a protective film, and the diameters of the semicircular reflector and the circular reflector are greater than or equal to 58 mm and less than or equal to 62 mm.

[0009] In some implementations, the gas pool includes a light-collecting eye, which is used to collect and guide the first detection light and the second detection light after multiple reflections to the detector, and the angle between a first direction where the first detection light and the second detection light whose optical axes coincide with each other and a second direction determined by the light-collecting eye and the exit point of the common-path optical machine component is greater than or equal to 2 degrees and less than or equal to 4 degrees, wherein the optical axes of the first detection light and the second detection light emitted from the exit point of the common-path optical machine component coincide.

[0010] In some implementations, the detector comprises a mercury cadmium telluride infrared detector, and the first laser and the second laser each comprise a quantum cascade laser.

[0011] In some implementations, the ship exhaust intelligent telemetry system further includes an amplification module, the detector is connected to the processing module via the amplification module, and the amplification module is used to enhance the first electrical signal and the second electrical signal.

[0012] In some implementations, the ship exhaust intelligent telemetry system also includes a constant pressure air pump, which is connected to a gas pool. The constant pressure air pump makes the pressure in the gas pool greater than or equal to 0.4 standard atmospheric pressure and less than or equal to 0.6 standard atmospheric pressure. The constant pressure air pump is used to collect ship exhaust.

[0013] In some implementations, the ship exhaust intelligent telemetry system also includes a pre-processing module, which is located between the constant pressure air pump and the gas pool, and is used to filter and dry the ship exhaust.

[0014] In some implementations, the first detection gas includes carbon dioxide, and the wavelength of the first detection light is greater than or equal to 4 microns and less than or equal to 4.6 microns; the second detection gas includes sulfur dioxide, and the wavelength of the second detection light is greater than or equal to 7.1 microns and less than or equal to 7.7 microns.

[0015] The present invention also provides a method for intelligent remote sensing of ship exhaust, which includes: using a signal generating module to generate a reference signal for measuring and analyzing ship exhaust components, wherein the ship exhaust components include a first detection gas and a second detection gas; inputting the reference signal into a first laser through a first laser driving module, and simultaneously inputting the reference signal into a second laser through a second laser driving module, wherein the first laser is excited to emit a first detection light corresponding to the first detection gas, and the second laser is excited to emit a second detection light corresponding to the second detection gas; using a common path optical-mechanical component to overlap the optical axis of the first detection light and the optical axis of the second detection light; the first detection light and the second detection light with overlapped optical axes are emitted after multiple reflections in a gas pool; using a detector to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and obtaining a first electrical signal corresponding to the first detection light based on the optical information of the first detection light, and obtaining a second electrical signal corresponding to the second detection light based on the optical information of the second detection light; using a processing module to obtain the detection concentration of the first detection gas based on the first electrical signal through concentration inversion processing, and to obtain the detection concentration of the second detection gas based on the second electrical signal through concentration inversion processing.

[0016] The present invention provides an intelligent remote sensing system for ship exhaust gas. The system introduces a gas pool to detect the concentration of ship exhaust gas. Since a first detection light corresponding to a first detection gas and a second detection light corresponding to a second detection gas are reflected multiple times in the gas pool, the optical path is extended multiple times, thereby improving the sensitivity of the monitoring system and thus improving the accuracy of the ship exhaust gas concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Shown is a schematic structural diagram of a ship exhaust intelligent telemetry system provided in one embodiment of the present invention.

[0019] Figure 2 FIG. 1 is a schematic structural diagram of a Herriott long optical path gas cell provided in one embodiment of the present invention.

[0020] Figure 3 FIG. 4 is a schematic diagram showing an angle between a first direction and a second direction provided in an embodiment of the present invention.

[0021] Figure 4Shown is a schematic structural diagram of a ship exhaust intelligent telemetry system provided by another embodiment of the present invention.

[0022] Figure 5 The figure is a flow chart of a method for intelligent remote sensing of ship exhaust provided in accordance with an embodiment of the present invention.

[0023] Figure numerals: ship exhaust intelligent telemetry system 10; signal generating module 101; first laser driving module 102; first laser 103; second laser driving module 104; second laser 105; common path optical-mechanical assembly 106; gas pool 107; detector 108; processing module 109; amplification module 110; constant pressure air pump 111; pre-processing module 112; first signal generating terminal a1; second signal generating terminal a2; first input terminal b1; first output terminal b2; second input terminal c1; second output terminal c2; first direction X; second direction Y; light collecting eye P; emission point Q; display screen D; via O. DETAILED DESCRIPTION

[0024] As described in the background technology, the existing method for monitoring the concentration of ship exhaust components is mainly to obtain the concentration of carbon dioxide by non-dispersive infrared method and to obtain the concentration of sulfur dioxide by ultraviolet fluorescence method. First, the methods used to obtain the concentration of carbon dioxide and sulfur dioxide are different, resulting in different instruments used for monitoring, which leads to the concentration curves of the two gases being out of sync, and then the calculation accuracy of the fuel sulfur content based on the sulfur-carbon ratio is insufficient and the calculation process is realized by manual processing, resulting in large errors; secondly, under different working conditions, the pressure of the gas will also change, thereby affecting its absorption characteristics. For the non-dispersive infrared method, pressure changes will affect the absorption peak position and intensity of carbon dioxide, thereby introducing measurement errors. In addition, there are similar absorption spectra or emission characteristics between certain gases, which are prone to cross-sensitivity problems. For example, in the ultraviolet fluorescence method, the fluorescence signal of sulfur dioxide may be affected by other volatile organic compounds (VOCs), causing measurement errors.

[0025] Therefore, the accuracy of carbon dioxide concentration and sulfur dioxide concentration obtained in the prior art is low. In order to solve this technical problem, the present invention provides a ship exhaust intelligent telemetry system, including a signal generating module, a first laser driving module, a first laser, a second laser driving module, a second laser, a common path optical machine component, a gas pool, a detector and a processing module, wherein the signal generating module includes a first signal generating end and a second signal generating end, and the signal generating module is used to generate a reference signal for measuring and analyzing the ship exhaust components, and the ship exhaust components include a first detection gas and a second detection gas; the first laser driving module includes a first input end and a first output end, and the first input end is connected to the first signal generating end; the first output end is connected to the first laser, and the first laser is excited to emit a first detection light corresponding to the first detection gas; the second laser driving module includes a second input end and a second output end, and the second input end is connected to the second signal generating end. The first detection light source is connected to the generator end; the second output end is connected to the second laser, and the second laser is excited to emit a second detection light corresponding to the second detection gas; after the first detection light and the second detection light pass through the common-path optical-mechanical component, the optical axis of the first detection light and the optical axis of the second detection light coincide with each other; the first detection light and the second detection light with coincident optical axes are emitted after multiple reflections in the gas pool; the detector is used to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and obtain a first electrical signal corresponding to the first detection light based on the optical information of the first detection light, and obtain a second electrical signal corresponding to the second detection light based on the optical information of the second detection light; the processing module is connected to the detector, and is used to obtain the detection concentration of the first detection gas based on the first electrical signal through concentration inversion processing, and to obtain the detection concentration of the second detection gas based on the second electrical signal through concentration inversion processing.

[0026] The system introduces a gas pool to detect the concentration of ship exhaust gas. Since the first detection light corresponding to the first detection gas and the second detection light corresponding to the second detection gas are reflected multiple times in the gas pool, the optical path is extended multiple times, thereby improving the sensitivity of the monitoring system and thus improving the accuracy of the ship exhaust gas concentration.

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. 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 belong to the scope of protection of the present invention.

[0028] Figure 1 FIG. 1 is a schematic diagram of the structure of a ship exhaust intelligent telemetry system provided by an embodiment of the present invention. Figure 1As shown, the ship exhaust intelligent telemetry system 10 includes a signal generating module 101, a first laser driving module 102, a first laser 103, a second laser driving module 104, a second laser 105, a common path optical machine component 106, a gas pool 107, a detector 108 and a processing module 109, wherein the signal generating module 101 includes a first signal generating terminal a1 and a second signal generating terminal a2, and the signal generating module 101 is used to generate a reference signal for measuring and analyzing ship exhaust components, and the ship exhaust components include a first detection gas and a second detection gas; the first laser driving module 102 includes a first input terminal b1 and a first output terminal b2, and the first input terminal b1 is connected to the first signal generating terminal a1; the first output terminal b2 is connected to the first laser 103, and the first laser 103 is excited to generate a first detection light corresponding to the first detection gas; the second laser driving module 104 includes a second input terminal c1 and a second output terminal c2, and the second output terminal c2 The input end c1 is connected to the second signal generating end a2; the second output end c2 is connected to the second laser 105, and the second laser 105 is excited to emit a second detection light corresponding to the second detection gas; after the first detection light and the second detection light pass through the common-path optical-mechanical component 106, the optical axis of the first detection light and the optical axis of the second detection light coincide with each other; the first detection light and the second detection light with coincident optical axes are emitted after multiple reflections in the gas pool 107; the detector 108 is used to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool 107, and obtain a first electrical signal corresponding to the first detection light based on optical information of the first detection light, and obtain a second electrical signal corresponding to the second detection light based on optical information of the second detection light; the processing module 109 is connected to the detector 108, and is used to obtain the detection concentration of the first detection gas based on the first electrical signal and after concentration inversion processing, and to obtain the detection concentration of the second detection gas based on the second electrical signal and after concentration inversion processing.

[0029] In the ship exhaust intelligent telemetry system 10 provided in the embodiment of the present invention, the gas pool 107 is introduced to detect the concentration of ship exhaust. Since the first detection light corresponding to the first detection gas and the second detection light corresponding to the second detection gas are reflected multiple times in the gas pool 107, the optical path is extended multiple times, which means that the interaction distance between the first detection light and the first detection gas, and between the second detection light and the second detection gas is also extended accordingly. According to the Lambert-Beer absorption law, the degree of absorption is proportional to the optical path length, so a longer optical path can enhance the detection capability of low-concentration gas components (such as the first detection gas carbon dioxide and the second detection gas sulfur dioxide).

[0030] In addition, due to the longer optical path, even very weak absorption signals can be amplified, thereby reducing the background noise and improving the signal-to-noise ratio. This helps to more accurately distinguish the target gas (such as the first detection gas and the second detection gas) from other substances and reduce the possibility of misjudgment.

[0031] Therefore, the present invention improves the sensitivity of the telemetry system by introducing the gas pool 107, thereby improving the accuracy of the ship exhaust concentration.

[0032] It should be noted that before the first detection light leaves the first laser 103 and enters the gas pool 107, and before the second detection light leaves the second laser 105 and enters the gas pool 107, they are synthesized into a beam of light through the common path optical-mechanical component 106 (i.e., the optical axis of the first detection light coincides with the optical axis of the second detection light), thereby ensuring the synchronization of monitoring the first detection gas and the second detection gas, thereby improving the measurement accuracy of the sulfur content in the fuel.

[0033] In some embodiments, gas pool 107 contains exhaust gas from a ship.

[0034] In some embodiments, the reference signal may be an external scanned and modulated signal with a phase difference of 180°.

[0035] In some embodiments, the optical information of the first detection light includes information such as the intensity, wavelength, and phase of the first detection light, and the optical information of the second detection light includes information such as the intensity, wavelength, and phase of the second detection light.

[0036] In some embodiments, the ship exhaust intelligent telemetry system 10 further includes a display screen D, which is connected to the processing module 109 and is used to display the detection concentration of the first detection gas and the detection concentration of the second detection gas.

[0037] Figure 2 FIG. 1 is a schematic diagram of the structure of a Herriott long optical path gas cell provided by an embodiment of the present invention. Figure 2 As shown, in some implementations, the gas pool 107 includes a Herriott long optical path gas pool, which includes two spherical reflectors arranged at intervals, with the convex surface of the spherical reflector facing away from the other spherical reflector, and a through hole O is arranged at the center of one of the spherical reflectors, and the first detection light and the second detection light with coincident optical axes are incident through the hole O, and are emitted through the hole O after multiple reflections in the Herriott long optical path gas pool.

[0038] The Herriott long optical path gas cell is designed with the Herriott optical path structure, and is more suitable for laser light sources with longer optical paths. After the light enters the gas cell, it will be reflected many times before being emitted, which generally extends the optical path by several or dozens of times. The optical path is generally more than 10 meters, and the optical path length is several or dozens of times the physical length. It is widely used in flue gas analysis, industrial process gas detection and other fields.

[0039] In some other implementations, the gas cell 107 includes a YL-76 type optical multi-pass absorption cell, which includes two semicircular reflectors and a circular reflector that are sequentially spaced apart.

[0040] The YL-76 optical multi-pass absorption cell is a device specially designed to enhance the optical path length and is widely used in environmental monitoring, industrial process control, laboratory research, etc. It allows light to pass through the sample (first detection gas and second detection gas) multiple times in a limited space through multiple reflections, thereby significantly increasing the interaction path between light and the sample and improving detection sensitivity and accuracy.

[0041] In some embodiments of the YL-76 optical multi-pass absorption cell, the spacing between two adjacent reflectors is greater than or equal to 30 cm and less than or equal to 34 cm, for example, it can be 30 cm, 31 cm, 32 cm, 33 cm, or 34 cm.

[0042] In some embodiments of the YL-76 optical multi-pass absorption cell, the effective optical path of light is as long as 76 meters after 208 reflections between two adjacent reflectors.

[0043] In some implementations, the semicircular reflector and the circular reflector both include a stacked silver film and a protective film, and the diameters of the semicircular reflector and the circular reflector are greater than or equal to 58 mm and less than or equal to 62 mm.

[0044] In some embodiments, the diameters of the semicircular reflectors and the circular reflectors may be 58 mm, 59 mm, 60 mm, 61 mm, or 62 mm.

[0045] In some embodiments, the effective reflection spectrum threshold range of the semicircular reflector and the circular reflector may be greater than or equal to 450 nanometers and less than or equal to 20 micrometers.

[0046] Figure 3 FIG. 2 is a schematic diagram showing an angle between a first direction and a second direction provided by an embodiment of the present invention. Figure 3 As shown, in some implementations, the gas pool includes a light-collecting eye P, which is used to collect and guide the first detection light and the second detection light after multiple reflections to the detector 108, and the angle between the first direction X where the first detection light and the second detection light whose optical axes coincide with each other and the second direction Y determined by the light-collecting eye P and the exit point Q of the common-path optical machine component 106 is greater than or equal to 2 degrees and less than or equal to 4 degrees, wherein the optical axes of the first detection light and the second detection light emitted from the exit point Q of the common-path optical machine component 106 coincide.

[0047] In some embodiments, the angle between the first direction X and the second direction Y can be 2 degrees, 3 degrees, or 4 degrees. When the angle between the first direction X and the second direction Y is 3 degrees, the reflection effect of the first detection light and the second detection light after entering the gas pool 107 is better.

[0048] In some embodiments, the second direction Y may be Figure 3 Transverse to the viewing direction, the first direction X can be obtained by rotating the second direction Y downward by 3 degrees.

[0049] In some implementations, the detector 108 includes a mercury cadmium telluride infrared detector, and the first laser 103 and the second laser 105 each include a quantum cascade laser.

[0050] It should be noted that the mercury cadmium telluride infrared detector is a high-sensitivity photoelectric detector made of mercury cadmium telluride material, which is more sensitive to light waves in the mid-infrared spectral band from 2 microns to 12 microns.

[0051] Mercury cadmium telluride infrared detectors have high quantum efficiency and low dark current. Specifically, mercury cadmium telluride materials have extremely high absorption rates for infrared radiation and can provide excellent quantum efficiency over a wide wavelength range, which means that more incident photons can be converted into electronic signals. Compared with some other types of infrared detectors, mercury cadmium telluride detectors exhibit very low dark current under low temperature conditions, which helps reduce background noise and improve the signal-to-noise ratio, thereby achieving more accurate measurements.

[0052] Quantum Cascade Laser (QCL) is a new type of semiconductor laser. QCL has the characteristics of small size and long life of traditional semiconductor lasers, but its working principle is completely different from that of traditional semiconductor lasers. The light-emitting mechanism of traditional semiconductor lasers is the recombination of electron-hole pairs in the conduction band and the valence band, while QCL uses the transition of electrons between the conduction band and the sub-band to emit light, and only electrons participate in stimulated radiation throughout the process. QCL is the product of the theoretical innovation of semiconductor lasers, which greatly expands the lasing range of semiconductor lasers. Before the invention of QCL, the emission wavelength of traditional semiconductor lasers was mainly in the visible light and near-infrared bands, while QCL expanded the emission range of semiconductor lasers to the mid-to-far infrared and terahertz bands, making it more and more used in gas detection, space communications, infrared countermeasures, terahertz imaging, etc.

[0053] Compared with other lasers, quantum cascade lasers have the following advantages: First, they emit in the mid-infrared and terahertz bands: Before the emergence of QCL, the emission wavelengths of semiconductor lasers were mainly in the visible and near-infrared bands. When we need to use lasers in the mid-infrared and terahertz bands, semiconductor lasers are somewhat powerless. The invention of QCL has enabled semiconductor lasers to emit lasers in the mid-infrared and terahertz bands. Second, wide wavelength range: The QCL lasing wavelength depends on the energy difference between sub-bands, and wavelength control can be achieved by designing the thickness of the quantum well layer. Therefore, the lasing wavelength range of quantum cascade lasers is extremely wide (about 3-250 microns), and laser output of specific wavelengths can be designed according to actual needs.

[0054] In addition, QCL has the advantages of small size, light weight, high electron utilization, easy to carry, easy to systematize and integrate, etc.

[0055] Figure 4 FIG. 2 is a schematic diagram of the structure of a ship exhaust intelligent telemetry system provided by another embodiment of the present invention. Figure 4 As shown, in some implementations, the ship exhaust intelligent telemetry system 10 further includes an amplification module 110, and the detector 108 is connected to the processing module 109 via the amplification module 110, and the amplification module 110 is used to enhance the first electrical signal and the second electrical signal.

[0056] In some embodiments, the amplification module 110 may use a digital lock-in amplifier, which is a weak signal detection device based on the cross-correlation detection principle, which can extract weak signals of known frequencies from a highly interfering environment and has the characteristics of high sensitivity and strong anti-interference ability.

[0057] refer to Figure 4 In some implementations, the ship exhaust intelligent telemetry system 10 also includes a constant pressure air pump 111, which is connected to the gas pool 107. The constant pressure air pump 111 makes the pressure in the gas pool 107 greater than or equal to 0.4 standard atmospheric pressure and less than or equal to 0.6 standard atmospheric pressure. The constant pressure air pump 111 is used to collect ship exhaust.

[0058] In some embodiments, the pressure in the gas pool 107 may be 0.4 standard atmospheres, 0.5 standard atmospheres, or 0.6 standard atmospheres. The constant pressure gas pump 111 collects the ship exhaust gas and transports the ship exhaust gas to the gas pool 107 .

[0059] refer to Figure 4 In some implementations, the ship exhaust intelligent telemetry system 10 also includes a preprocessing module 112, which is located between the constant pressure air pump 111 and the gas pool 107. The preprocessing module 112 is used to filter and dry the ship exhaust to protect the lenses in the gas pool 107 from contamination and corrosion.

[0060] In some implementations, the first detection gas includes carbon dioxide, and the wavelength of the first detection light is greater than or equal to 4 microns and less than or equal to 4.6 microns; the second detection gas includes sulfur dioxide, and the wavelength of the second detection light is greater than or equal to 7.1 microns and less than or equal to 7.7 microns.

[0061] In some embodiments, the wavelength of the first detection light can be 4 microns, 4.1 microns, 4.2 microns, 4.3 microns, 4.4 microns, 4.5 microns or 4.6 microns, preferably 4.3 microns. The wavelength of the second detection light can be 7.1 microns, 7.2 microns, 7.3 microns, 7.4 microns, 7.5 microns, 7.6 microns or 7.7 microns, preferably 7.4 microns.

[0062] The embodiment of the present invention mainly obtains the detection concentrations of carbon dioxide and sulfur dioxide in the exhaust gas components of the ship with high accuracy.

[0063] In actual application, when the carbon dioxide concentration and / or sulfur dioxide concentration detected by the system exceeds the standard value, an alarm message is immediately sent to the Maritime Safety Administration. After the Maritime Safety Administration locks the ship with excessive emissions, it records the ship's name, captain, destination port information in the ship's AIS information, as well as the ship's sulfur content estimation results, carbon dioxide concentration and sulfur dioxide concentration, and submits them to the Maritime Safety Administration of the destination port.

[0064] Among them, the exhaust source ship locking algorithm can be used to automatically lock the exhaust source ship according to wind speed, wind direction and ship AIS data.

[0065] In some embodiments, a method for calculating the sulfur content of fuel is also provided. The formula is as follows:

[0066] Among them, x and y are the concentration value arrays of SO2 and CO2 within a time range, respectively, and N is the number of concentration value arrays. a is the slope, that is, the multiple of SO2 increase when CO2 concentration increases. Since the CO2 concentration in the fuel can be assumed to be equal to 87%, the calculation formula for the fuel sulfur content (expressed as S%) is as follows: S%=a×0.232.

[0067] Figure 5 FIG. 1 is a flow chart of a method for intelligent remote sensing of ship exhaust gas provided by an embodiment of the present invention. Figure 5 As shown, the present invention also provides a ship exhaust intelligent remote sensing method, the method comprising the following steps: Step S510: using a signal generation module to generate a reference signal for measuring and analyzing the exhaust gas components of a ship, wherein the exhaust gas components of the ship include a first detection gas and a second detection gas.

[0068] Step S520: input the reference signal into the first laser through the first laser driving module, and input the reference signal into the second laser through the second laser driving module.

[0069] The first laser is excited to emit a first detection light corresponding to the first detection gas, and the second laser is excited to emit a second detection light corresponding to the second detection gas.

[0070] Step S530: Use a common-path optical-mechanical component to make the optical axis of the first detection light coincide with the optical axis of the second detection light.

[0071] Step S540: The first detection light and the second detection light whose optical axes coincide with each other are emitted after being reflected multiple times in the gas pool.

[0072] In step S550, a detector is used to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and a first electrical signal corresponding to the first detection light is obtained based on the optical information of the first detection light, and a second electrical signal corresponding to the second detection light is obtained based on the optical information of the second detection light.

[0073] In step S560, the processing module is used to obtain the detection concentration of the first detection gas through concentration inversion processing based on the first electrical signal, and to obtain the detection concentration of the second detection gas through concentration inversion processing based on the second electrical signal.

[0074] The ship exhaust intelligent telemetry method provided in the embodiment of the present invention corresponds one to one with the technical features of the ship exhaust intelligent telemetry system, and the technical effects produced are similar thereto, which will not be described one by one here.

[0075] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0076] It should also be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A ship exhaust intelligent telemetry system, characterized in that: include: A signal generating module, comprising a first signal generating end and a second signal generating end, wherein the signal generating module is used to generate a reference signal for measuring and analyzing components of ship exhaust gas, wherein the ship exhaust gas components include a first detection gas and a second detection gas; A first laser driving module comprises a first input end and a first output end, wherein the first input end is connected to the first signal generating end; A first laser, wherein the first output end is connected to the first laser, and the first laser is excited to emit a first detection light corresponding to the first detection gas; A second laser driving module comprises a second input end and a second output end, wherein the second input end is connected to the second signal generating end; A second laser, the second output end is connected to the second laser, and the second laser is excited to emit a second detection light corresponding to the second detection gas; a common-path optical-mechanical component, wherein after the first detection light and the second detection light pass through the common-path optical-mechanical component, an optical axis of the first detection light and an optical axis of the second detection light coincide with each other; A gas pool, wherein the first detection light and the second detection light whose optical axes coincide with each other are emitted after being reflected multiple times in the gas pool; a detector, configured to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and obtain a first electrical signal corresponding to the first detection light based on optical information of the first detection light, and obtain a second electrical signal corresponding to the second detection light based on optical information of the second detection light; A processing module is connected to the detector, and is used to obtain the detection concentration of the first detection gas based on the first electrical signal through concentration inversion processing, and to obtain the detection concentration of the second detection gas based on the second electrical signal through concentration inversion processing.

2. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: The gas pool includes a Herriott long optical path gas pool, and the Herriott long optical path gas pool includes two spherical reflectors arranged at intervals, the convex surface of the spherical reflector faces away from the other spherical reflector, and a through hole is arranged at the center of one of the spherical reflectors, and the first detection light and the second detection light with overlapping optical axes are incident through the through hole, and are emitted through the through hole after multiple reflections in the Herriott long optical path gas pool.

3. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: The gas cell comprises a YL-76 type optical multi-pass absorption cell, and the YL-76 type optical multi-pass absorption cell comprises two semicircular reflectors and a circular reflector which are sequentially arranged at intervals.

4. The ship exhaust intelligent telemetry system according to claim 3 is characterized in that: The semicircular reflector and the circular reflector both include a stacked silver-plated film and a protective film, and the diameters of the semicircular reflector and the circular reflector are greater than or equal to 58 mm and less than or equal to 62 mm.

5. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: The gas pool includes a light-collecting eye, which is used to collect and guide the first detection light and the second detection light after multiple reflections to the detector, and the angle between the first direction where the first detection light and the second detection light whose optical axes coincide with each other and the second direction determined by the light-collecting eye and the exit point of the common-path optical machine component is greater than or equal to 2 degrees and less than or equal to 4 degrees, wherein the optical axes of the first detection light and the second detection light emitted from the exit point of the common-path optical machine component coincide.

6. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: The detector comprises a mercury cadmium telluride infrared detector, and the first laser and the second laser both comprise quantum cascade lasers.

7. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: It also includes an amplification module, through which the detector is connected to the processing module, and the amplification module is used to enhance the first electrical signal and the second electrical signal.

8. The ship exhaust intelligent telemetry system according to claim 1, characterized in that: It also includes a constant pressure air pump connected to the gas pool. The constant pressure air pump makes the pressure in the gas pool greater than or equal to 0.4 standard atmospheric pressure and less than or equal to 0.6 standard atmospheric pressure. The constant pressure air pump is used to collect the exhaust gas from the ship.

9. The ship exhaust intelligent telemetry system according to claim 8, characterized in that: It also includes a pre-treatment module, which is located between the constant pressure air pump and the gas pool, and the pre-treatment module is used for filtering and drying the ship exhaust gas.

10. A ship exhaust intelligent remote sensing method, characterized in that: include: Using a signal generation module to generate a reference signal for measuring and analyzing ship exhaust components, wherein the ship exhaust components include a first detection gas and a second detection gas; The reference signal is input into a first laser through a first laser driving module, and is input into a second laser through a second laser driving module, wherein the first laser is excited to emit a first detection light corresponding to the first detection gas, and the second laser is excited to emit a second detection light corresponding to the second detection gas; Using a common path optical mechanical component to make the optical axis of the first detection light coincide with the optical axis of the second detection light; The first detection light and the second detection light whose optical axes coincide with each other are emitted after being reflected multiple times in the gas pool; Using a detector to receive the first detection light and the second detection light emitted after multiple reflections in the gas pool, and obtaining a first electrical signal corresponding to the first detection light based on optical information of the first detection light, and obtaining a second electrical signal corresponding to the second detection light based on optical information of the second detection light; The processing module obtains the detection concentration of the first detection gas through concentration inversion processing based on the first electrical signal, and obtains the detection concentration of the second detection gas through concentration inversion processing based on the second electrical signal.

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