An in situ calibration device for a shipboard emissions monitoring apparatus

Abstract

The application relates to a kind of shipborne emission monitoring equipment in-situ calibration device, shipborne emission monitoring equipment in-situ calibration device includes automatic sampling device and shipborne emission monitoring equipment;Automatic sampling device includes box, bottom plate, partition, standard gas cylinder and flow control unit;Bottom plate and partition are respectively arranged on the box, bottom plate and partition are opened to form standard gas frame, and the standard gas frame is used to fix the standard gas cylinder;Standard gas cylinder is connected with the gas inlet pipeline in the box, for providing standard gas;Gas inlet pipeline is connected with flow control unit, and flow control unit is connected with gas outlet pipeline in the box;Shipborne emission monitoring equipment is connected with gas outlet pipeline in the box, for receiving standard gas;Shipborne emission monitoring equipment is used to receive standard gas, and correction is completed based on standard gas, to obtain calibration data.Through the application, the problem that the measurement result of shipborne emission monitoring equipment in the related art has low reliability is solved.

Description

Technical Field

[0001] This application relates to the field of marine technology, and in particular to an in-situ calibration device for shipborne emission monitoring equipment. Background Technology

[0002] The booming development of water transportation is a powerful driving force for my country's economic development. However, the accompanying air pollution emissions from ships pose a significant pressure and challenge to regional air quality. Ship engines, primarily Stage II diesel engines, continuously emit air pollutants such as sulfur oxides, nitrogen oxides, and carbonaceous particulate matter during navigation and berthing.

[0003] Ship exhaust emission detection methods can be categorized based on their operating principles into land-based, ship-based, and drone-based methods. Ship-based methods involve installing onboard emission monitoring equipment on the vessel to monitor emissions in real time during navigation, playing a crucial role in preventing air pollution from ships. Current shipboard emission monitoring methods rely on fixed online sensors for direct measurement, which suffers from the inability to perform in-situ calibration, leading to lower reliability of the measurement results.

[0004] There is currently no effective solution to the problem of low reliability of measurement results from shipborne emission monitoring equipment in related technologies. Utility Model Content

[0005] This embodiment provides an in-situ calibration device for shipborne emission monitoring equipment to address the problem of low reliability of measurement results of shipborne emission monitoring equipment in related technologies.

[0006] This embodiment provides an in-situ calibration device for shipborne emission monitoring equipment, including an automatic sampling device and shipborne emission monitoring equipment;

[0007] The automatic sample feeding device includes a housing, a base plate, a partition, a standard gas cylinder, and a flow control unit;

[0008] The base plate and the partition are respectively installed on the box body. When the base plate and the partition are opened, a standard gas frame is formed. The standard gas frame is used to fix the standard gas cylinder.

[0009] The standard gas cylinder is connected to the air inlet pipe in the box to provide standard gas;

[0010] The air intake pipe is connected to the flow control unit, and the flow control unit is connected to the air outlet pipe in the housing;

[0011] The shipborne emission monitoring equipment is connected to the gas outlet pipe in the housing and is used to receive the standard gas;

[0012] The shipborne emission monitoring equipment is used to receive the standard gas and perform calibration based on the standard gas to obtain calibration data.

[0013] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a data interaction unit;

[0014] The data interaction unit is connected to the communication unit of the shipborne emission monitoring equipment and is used to receive and process the calibration data.

[0015] In some embodiments, the in-situ calibration device for the shipborne emissions monitoring equipment also includes a satellite system and engine sensors;

[0016] The satellite system, connected to the data interaction unit, is used to provide real-time position and speed data of the ship;

[0017] The engine sensor, connected to the data interaction unit, is used to provide operating data of the ship's engine.

[0018] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a monitoring camera;

[0019] The surveillance camera is connected to the data interaction unit to implement an electronic fence.

[0020] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a first air pipe, a second air pipe, and a communication interface disposed on the housing;

[0021] The first air tube is disposed between the standard gas cylinder and the air inlet pipe;

[0022] The second air pipe is disposed between the shipborne emission monitoring equipment and the air outlet pipe;

[0023] The communication interface is connected to the shipborne emission monitoring equipment and is used to send control commands to the shipborne emission monitoring equipment.

[0024] The control command is used to set the shipborne emission monitoring equipment to enter calibration mode.

[0025] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a pressure reducing valve;

[0026] The pressure reducing valve is located between the standard gas cylinder and the first gas tube;

[0027] Each of the standard gas cylinders is equipped with a pressure reducing valve and is connected to the corresponding air inlet pipe via the first gas pipe.

[0028] In some embodiments, the in-situ calibration device for the shipborne emission monitoring equipment further includes rubber shock-absorbing pads;

[0029] The rubber shock-absorbing pads are installed on the housing to buffer the vibrations and impacts generated during the calibration process.

[0030] In some of these embodiments, the flow control unit includes a filter pressure reducing unit, a precision air resistance module, a volumetric flow meter, and a microflow path channel;

[0031] The filtration and pressure reduction unit is connected to the precision gas resistance module through the micro-flow path channel, and is used to filter and reduce the pressure of the standard gas;

[0032] The precision gas resistance module is connected to the volumetric flow meter through the micro flow path channel and is used to stabilize the pressure of the standard gas.

[0033] The volumetric flow meter is used to control the flow rate of the standard gas at constant pressure or constant flow.

[0034] In some of these embodiments, the volumetric flow meter includes a proportional valve and a flow-limiting orifice;

[0035] The proportional valve, connected to the flow-limiting orifice, is used to regulate the flow rate of the standard gas;

[0036] The flow-limiting orifice is used to generate a differential pressure signal to calculate the volumetric flow rate of the standard gas.

[0037] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a handle;

[0038] The handle is provided on the box body and is used to transport the automatic sample feeding device when it is in the folded state.

[0039] Compared with related technologies, this embodiment provides an in-situ calibration device for shipborne emission monitoring equipment, including an automatic sampling device and a shipborne emission monitoring device. The automatic sampling device includes a housing, a base plate, a partition, a standard gas cylinder, and a flow control unit. The base plate and partition are respectively installed on the housing, forming a standard gas frame when opened, which is used to fix the standard gas cylinder. The standard gas cylinder is connected to an inlet pipe in the housing to provide standard gas. The inlet pipe is connected to the flow control unit, which is connected to an outlet pipe in the housing. The shipborne emission monitoring device is connected to the outlet pipe in the housing to receive the standard gas. The shipborne emission monitoring device receives the standard gas and performs calibration based on the standard gas to obtain calibration data. This application utilizes the coordinated operation of the automatic sampling device, a data interaction unit, and a monitoring camera. After the pipeline connection, the data from the shipborne emission monitoring device is collected, stored, and wirelessly transmitted, and the monitoring camera is used to implement an electronic fence function. This solves the problem of low reliability of measurement results of shipborne emission monitoring devices in related technologies.

[0040] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0042] Figure 1 This is a structural block diagram of an in-situ calibration device for shipborne emission monitoring equipment provided in an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the retracted structure of an automatic sample dispenser provided in one embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the unfolded structure of an automatic sample delivery device provided in one embodiment of this application;

[0045] Figure 4 This is a bus protocol conversion technology model diagram of a data interaction unit provided in an embodiment of this application;

[0046] Figure 5 This is a flowchart of an embodiment of the in-situ calibration method for shipborne emission monitoring equipment provided in this application;

[0047] Figure 6 This is a schematic flowchart of a calibration method provided in an embodiment of this application.

[0048] Reference numerals: 100, Automatic sampling device; 200, Shipborne emission monitoring equipment; 300, Data interaction unit; 400, Surveillance camera; 500, Satellite system; 600, Engine sensor; 700, Monitoring platform; 101, Intake pipe; 102, Handle; 103, Power connector; 104, Communication interface; 105, Exhaust pipe; 106, Rubber shock absorber; 107, Base plate; 108, Partition; 109, Standard gas cylinder; 110, Pressure reducing valve; 111, PU gas hose. Detailed Implementation

[0049] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0050] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order of objects.

[0051] This embodiment provides an in-situ calibration device for shipborne emission monitoring equipment. Figure 1 This is a structural block diagram of the in-situ calibration device for the shipborne emission monitoring equipment in this embodiment. Figure 1 As shown, the device includes an automatic sampling device and shipboard emission monitoring equipment;

[0052] The automatic sampler includes a housing, a base plate, a partition, a standard gas cylinder, and a flow control unit;

[0053] The base plate and partition are respectively installed on the box body. When the base plate and partition are opened, a standard gas rack is formed, which is used to fix the standard gas cylinder.

[0054] The standard gas cylinder is connected to the inlet pipe in the housing to provide standard gas;

[0055] The air intake pipe is connected to the flow control unit, and the flow control unit is connected to the air outlet pipe in the housing.

[0056] The shipborne emission monitoring equipment is connected to the gas outlet pipe in the container to receive standard gas;

[0057] Shipborne emission monitoring equipment is used to receive standard gases and perform calibration based on the standard gases to obtain calibration data.

[0058] Specifically, the automated sampler is used for the storage, fixation, pressure regulation, and precise flow control of standard gases, and for their stable delivery to the shipboard emission monitoring equipment being calibrated, providing a reliable gas reference of known concentration for in-situ calibration. Its structure can be as follows: Figure 2 As shown, the automatic sampling device 100 has four inlet pipes 101 at the top for introducing standard gas. The standard gas can be selected from four 4-liter standard cylinders as the gas mixing raw material. Depending on the needs of the equipment being calibrated, a high, medium, and low concentration mixture of standard gas (SO2, NO, CO2) and zero N2 gas can be prepared. There are no restrictions on the type of standard gas. The device has an outlet pipe 105 on its side, which connects to the shipborne emission monitoring equipment 200 being calibrated via a PU gas tube. The base plate 107 can be rotated downwards and opened, and the partition plate 108 can be rotated upwards and opened. Both are used to fix the standard gas cylinder 109 after opening. The opening method can also be a sliding push-pull type or a multi-section folding type. There are no restrictions on the opening method of the base plate and the partition plate.

[0059] Shipborne emission monitoring equipment is used to receive standard gases and perform automatic calibration based on these standard gases. When the equipment is connected to an automatic sampler and enters calibration mode, its internal analyzer receives a standard gas of known precise concentration from the automatic sampler and measures it as a simulated "exhaust gas sample." The built-in processor calculates and outputs a corresponding gas concentration measurement value using a built-in, uncalibrated raw algorithm or calibration curve, based on the signal value measured by the analyzer. This measurement value is compared with the known reference concentration of the introduced standard gas to calculate key performance indicators such as indication error, repeatability, and response time of the shipborne emission monitoring equipment in the current state. Based on these performance indicators, a more accurate calibration curve is generated.

[0060] In this embodiment, the deployable design of the housing, base plate, and partitions forms a robust standard gas cylinder mounting bracket, ensuring the safety of the gas cylinders in a swaying environment on board. Four independent inlet pipes support flexible configuration of standard gases with multiple concentrations. The centralized arrangement of power connectors, communication interfaces, and outlet pipes simplifies on-site wiring. Rubber shock-absorbing pads effectively mitigate the impact of ship vibrations on precision gas circuit components. The integrated and portable design allows for rapid deployment on-site. Using standard gas provided by standard cylinders and precise flow control, the device directly calibrates the shipborne emission monitoring equipment in situ. This effectively solves the problem of low reliability of measurement results caused by the inability to perform in-situ calibration in traditional calibration methods, significantly improving the timeliness and feasibility of shipborne emission monitoring equipment calibration and providing reliable technical support for ship emission supervision.

[0061] In some embodiments, the in-situ calibration device for shipborne emission monitoring equipment also includes a data interaction unit;

[0062] The data interaction unit connects to the communication unit of the shipborne emission monitoring equipment and is used to receive and process calibration data.

[0063] Specifically, such as Figure 1 As shown, the data interaction unit 300 uses bus protocol conversion technology to acquire data from the shipborne emission monitoring equipment. Figure 4 As shown, after receiving the data frame at the link layer, the frame format is converted, removing the frame header and trailer of the current bus protocol, extracting the required data, and adding the frame header and trailer of another bus protocol before loading it onto the physical layer for transmission. The bus-compatible device supports Ethernet on one end and various other bus interfaces on the other, enabling one-to-many protocol conversion. Supported bus protocols include RS-232, RS-485, GPIB, and CAN; no restrictions are placed on the type of bus protocol. The data interaction unit receives and stores raw response data from the shipborne emission monitoring equipment in real time, compares and analyzes the raw response data with the concentration parameters of the standard gas introduced by the automatic sampling device, automatically calculates the indication error and repeatability indicators, and automatically generates a calibration report based on the detection data to determine whether it is qualified. The data interaction unit can use a handheld tablet or an operating display screen as a carrier; no restrictions are placed on the form of the carrier.

[0064] This embodiment, based on the communication requirements of shipborne emission monitoring equipment, utilizes bus protocol conversion technology to customize bus-compatible equipment, achieving consistency in software and hardware data interaction APIs and simplifying the hardware interface for upper-layer software programming. It supports the splitting and reassembly of frame headers and trailers for multiple bus protocols, enabling mutual conversion between various heterogeneous protocols. Simultaneously, the introduction of a data interaction unit avoids errors that may be introduced by traditional manual recording and calculation, greatly improving the efficiency and accuracy of data processing. All raw data and processing procedures are completely recorded and saved, ensuring the authenticity and traceability of calibration results, and providing direct and reliable electronic evidence for metrological traceability and supervision.

[0065] In some embodiments, the in-situ calibration device for shipborne emissions monitoring equipment also includes a satellite system and engine sensors;

[0066] The satellite system, connected to the data interaction unit, is used to provide real-time position and speed data of the ship;

[0067] Engine sensors, connected to a data interaction unit, are used to provide operational data of the ship's engines.

[0068] Specifically, such as Figure 1 As shown, firstly, the satellite system 500 connects to the data unit, transmitting the ship's real-time position (such as latitude and longitude coordinates) and speed (such as ground speed) to the data interaction unit. The satellite system can be BeiDou, GPS, or Galileo, etc., and there are no restrictions on the type of satellite system or the data types it provides.

[0069] Secondly, the engine sensor 600 connects to the data interaction unit, sending the engine sensor's operating data to the data interaction unit. The operating data can include engine speed, load, and exhaust emission concentration, etc. There are no restrictions on the type of data provided by the engine sensor.

[0070] Finally, the data interaction unit uses wireless communication technology to periodically send the collected data to the monitoring platform 700. This data includes basic information such as the ship's name, IMO number, real-time location, and speed, as well as key data such as exhaust emission concentration. Simultaneously, the monitoring platform can also remotely issue commands to the data interaction unit to obtain real-time ship emission data.

[0071] Through this embodiment, calibration data can establish a precise correspondence with specific navigation conditions (such as cruising, acceleration, and berthing), verifying the monitoring accuracy of shipborne emission monitoring equipment under different conditions. Simultaneously, all calibration operations and results are assigned precise time and space stamps, constructing a complete data chain. This provides precise metrological data support with strong spatiotemporal correlation for regional emission supervision and control area regulatory compliance verification, significantly improving the targeting and effectiveness of supervision.

[0072] In some embodiments, the in-situ calibration device for shipborne emission monitoring equipment also includes a monitoring camera;

[0073] Surveillance cameras, connected to a data interaction unit, are used to implement electronic fences.

[0074] Specifically, such as Figure 1 As shown, the monitoring camera 400 is used to implement the electronic fence function. First, before the calibration operation begins, a physical area to be protected (such as a 1-2 meter radius around the automatic sampler) is manually demarcated in the real-time view of the monitoring camera through the software interface of the data interaction unit, generating an invisible "virtual fence." This area is the protected calibration work area. Second, if unauthorized personnel enter, the standard malfunctions, or the experimental environment parameters deviate from the set range, the system will automatically trigger an alarm, discard the current test data, stop the test procedure, and enter the anomaly handling process. This mechanism effectively ensures that the calibration process is undisturbed and that the testing behavior is standardized and impartial, thereby preventing unauthorized tampering with equipment or parameters.

[0075] This embodiment utilizes surveillance cameras to achieve full-process, blind-spot-free automatic monitoring of the calibration site, forming a security protection system that combines physical space with digital management. The electronic fence function can intelligently identify risks such as unauthorized intervention, equipment malfunctions, and environmental parameter violations, and automatically trigger a three-level linkage protection mechanism including data discarding, process suspension, and status alarms. This fundamentally eliminates human interference in the calibration process, ensuring the standardization of testing activities and the authenticity of results.

[0076] In some of these embodiments, the shipborne emission monitoring equipment in-situ calibration device further includes a first air pipe, a second air pipe, and a communication interface disposed on the housing;

[0077] The first air tube is located between the standard gas cylinder and the air inlet pipe;

[0078] The second air pipe is located between the shipborne emission monitoring equipment and the air outlet pipe;

[0079] A communication interface, connected to the shipborne emission monitoring equipment, used to send control commands to the shipborne emission monitoring equipment;

[0080] Control commands are used to set the shipborne emission monitoring equipment to enter calibration mode.

[0081] Specifically, both the first and second air tubes are made of corrosion-resistant and aging-resistant PU material, possessing good flexibility and airtightness. The air tube material can also be polyurethane, fluororubber, polytetrafluoroethylene, etc., with no restrictions on the material. Simultaneously, the air tubes can also utilize rigid quick-connect interfaces, multi-channel fluid connection plates, etc., to achieve a tubeless design; the air path connection method is not limited. The communication interface establishes a communication connection with different models of shipborne emission monitoring equipment for sending control commands, and its structure can be as follows... Figure 2 As shown, the communication interface 104 is located on one side of the device and is connected to the shipborne emission monitoring equipment 200 being monitored via a data cable. The handle 102 on top of the device facilitates handling when the device is folded up. The power connector 103 needs to be connected to an AC power source capable of providing at least 1.5A of output current, and the power source must be properly grounded. Control commands include device mode switching, range selection, and data acquisition trigger commands.

[0082] This embodiment establishes a complete gas path connection and data exchange channel between the automatic sampling device and the shipborne emission monitoring equipment. Standard gas enters the flow control unit through the first gas pipe and the inlet pipe, and after precise control, is stably delivered to the device under calibration through the second gas pipe. Simultaneously, through a standardized communication interface and dedicated control commands, remote setting and control of the shipborne monitoring equipment's operating mode are achieved. This dual-path connection scheme ensures the synchronization and coordination of standard gas and information flow during the calibration process, achieving a high degree of automation throughout the calibration process. It significantly reduces manual operation, improving calibration efficiency while minimizing errors introduced by human factors, thus guaranteeing the accuracy and reliability of the calibration results.

[0083] In some embodiments, the in-situ calibration device for shipborne emission monitoring equipment also includes a pressure reducing valve;

[0084] The pressure reducing valve is located between the standard gas cylinder and the first gas tube;

[0085] Each standard gas cylinder is equipped with a pressure reducing valve and is connected to the corresponding air inlet pipe via a first gas tube.

[0086] Specifically, the pressure reducing valve is a precision mechanical pressure reducing device, and its structure can be as follows: Figure 3 As shown, each standard gas cylinder 109 is equipped with a pressure reducing valve 110 connected to the corresponding inlet pipe 101 via a PU gas tube 111. Its input end is directly connected to the outlet of the standard gas cylinder, and its output end is connected to the inlet pipe of the automatic sampler via a first gas tube; this pressure reducing valve can stably reduce the high-pressure gas in the standard gas cylinder to the safe low-pressure operating range required by the subsequent flow control unit.

[0087] This embodiment equips each standard gas cylinder with an independent pressure reducing valve, enabling pressure regulation from the gas source. This not only ensures operational safety and effectively avoids the risk of equipment damage caused by high-pressure gas directly entering the calibration system, but also provides a stable inlet pressure condition for the downstream flow control unit. This reduces the impact of natural pressure drops or fluctuations in the gas cylinders on the accuracy of the final output gas flow rate, thus ensuring the stability and reliability of the standard gas supply throughout the calibration process and supporting accurate calibration results.

[0088] In some of these embodiments, the in-situ calibration device for shipborne emission monitoring equipment also includes rubber shock-absorbing pads;

[0089] Rubber shock-absorbing pads are installed on the housing to buffer the vibrations and impacts generated during the calibration process.

[0090] Specifically, rubber shock-absorbing pads are used for shock absorption and anti-slip purposes, and their structure can be as follows: Figure 2 As shown, the rubber damping pad 106 is made of high-damping rubber material and is fixedly installed at the four corners of the bottom of the box. The damping pad material can also be silicone rubber, neoprene rubber or composite damping material. The installation method can be full coverage or multi-point matrix. There are no restrictions on the material and installation method of the damping pad. The structural feature of the damping pad is that it has two parallel mounting planes at the top and bottom and an elastic support structure in the middle, which can effectively absorb and attenuate multi-directional vibrations from the ship deck.

[0091] This embodiment demonstrates how the use of rubber vibration damping pads significantly improves the adaptability and reliability of the device in ship vibration environments. Through physical isolation and energy absorption, it effectively reduces the adverse effects of continuous vibrations from ship engine operation and wave impacts on the precision gas path components and connecting pipelines inside the automatic sampler, preventing loose connections, gas leaks, or measurement inaccuracies in control components caused by vibration. This ensures the long-term stability of standard gas flow control and guarantees the measurement accuracy and reliability of in-situ calibration results for shipborne emission monitoring equipment.

[0092] In some of these embodiments, the flow control unit includes a filter pressure reducing unit, a precision air resistance module, a volumetric flow meter, and a microflow path channel;

[0093] The filtration and pressure reduction unit is connected to the precision gas resistance module through a miniature flow path channel and is used to filter and reduce the pressure of standard gases.

[0094] The precision gas resistance module is connected to the volumetric flow meter through a miniature flow path channel and is used to stabilize the pressure of standard gas.

[0095] Volumetric flow meters are used to control the flow rate of standard gases at constant pressure or constant flow.

[0096] Specifically, the filtration and pressure reduction unit first removes impurities from the gas and reduces the high pressure output from the gas cylinder to a stable pressure; the precision gas resistance module absorbs pressure fluctuations through its fixed flow resistance characteristics, providing stable input conditions; the volumetric flow meter uses an electronic pressure controller to achieve closed-loop flow control; and the micro-flow path channels connect the components in an integrated manner, significantly reducing the dead volume of the system.

[0097] This embodiment utilizes a modular, integrated gas path design to achieve miniaturization and high performance of the calibration device. The filtration and pressure reduction unit ensures gas purity and pressure stability, the precision gas resistance module provides ideal operating conditions for flow control, and the volumetric flow meter based on an electronic pressure controller achieves accurate constant flow or constant pressure output. In particular, the application of miniature flow path channels not only reduces the device size but also significantly improves the system's response speed and reduces gas replacement time. This integrated flow control scheme maintains long-term stable metrological performance in the harsh environment of ship vibration, ensuring the accuracy and reliability of calibration results from shipborne emission monitoring equipment.

[0098] In some of these embodiments, the volumetric flow meter includes a proportional valve and a flow-limiting orifice;

[0099] A proportional valve, connected to a flow-limiting orifice, is used to regulate the flow rate of standard gas;

[0100] The flow-limiting orifice is used to generate a differential pressure signal to calculate the volumetric flow rate of the standard gas.

[0101] Specifically, the proportional valve is a self-developed electronically controlled regulating valve, whose opening degree is precisely controlled by the control signal sent by the data interaction unit; the flow limiting orifice is a precision element with a fixed orifice diameter, which forms a stable pressure difference before and after the gas flows through it; the pressure difference signal is collected in real time and transmitted to the data processing module, and the precise volumetric flow rate value is calculated through the pre-calibrated flow-pressure difference relationship curve, thereby forming a closed-loop control loop.

[0102] This embodiment utilizes a combination of a proportional valve and a flow-limiting orifice to achieve low-cost, high-precision gas flow control. The proportional valve acts as the actuator to quickly and accurately adjust the flow rate, while the flow-limiting orifice provides a reliable flow feedback signal as the measuring element. The advantages of the self-developed flow meter are: the flow measurement method based on the differential pressure principle has a simple structure, high reliability, and is easy to integrate with equipment, enabling low-cost and rapid deployment; it also supports PLC or microcontroller programming, allows for custom control logic, eliminates complex sensors, has a low maintenance threshold, is suitable for harsh operating conditions, meets the requirements for in-situ calibration of shipborne emission monitoring equipment, and provides technical support for the miniaturization and backpack-like design of the device.

[0103] In some embodiments, an in-situ calibration method for shipborne emission monitoring equipment is provided, applicable to the in-situ calibration device for shipborne emission monitoring equipment described in the above embodiments, such as... Figure 5 As shown, the method includes the following steps:

[0104] Step S210: Place the standard gas cylinder into the standard gas rack and open the standard gas cylinder;

[0105] Step S220: Connect the automatic sampler to the shipborne emission monitoring equipment.

[0106] Step S230: Enter the basic information required for the calibration procedure;

[0107] Step S240: Perform the calibration procedure based on the basic information to obtain calibration data.

[0108] Specifically, firstly, the automatic sampling device is transported to the offshore vessel requiring calibration via unmanned transport, logistics transportation, or ship loading and unloading; then, the automatic sampling device is opened to form a standard gas rack; finally, the standard gas cylinder is placed in the standard gas rack and opened.

[0109] Secondly, such as Figure 6 As shown, the automatic sampler is connected to the shipborne emission monitoring equipment via a communication interface. Basic information such as ship name, IMO number, equipment name, equipment number, installation location, communication method, IP address, and equipment address are entered through the data interaction unit. The range and unit of the shipborne emission monitoring equipment are set, and test items and ventilation flow rates can be selected according to actual calibration requirements. The concentration parameters of the standard gas to be introduced are entered.

[0110] Finally, begin the automatic calibration process for the selected test items; in case of emergency, click Stop to end the current calibration process; wait for the calibration to complete and generate a calibration report; if the report results are unqualified, report to the regulatory platform.

[0111] For example, the data interaction unit uses a handheld tablet as the carrier. First, on the software homepage, click the "Start Testing" button to enter the calibration process. After starting the testing, you will enter the information entry interface, where you enter information such as the ship name, IMO number, equipment name, equipment number, installation location, communication method, IP address, and equipment address. If you have previously entered information under the "Information Entry" menu, click the "Synchronize" button to synchronize the entered information to the information entry interface.

[0112] Secondly, after entering the information, click the "Next" button to enter the shipborne emission monitoring equipment information configuration interface. This interface allows you to set the range and unit of the shipborne emission monitoring equipment. Each gas has two settings: "Range Information" and "Unit". For example, the range and unit of SO2 can be set to 1000 μmol and mol, respectively. These settings can be modified according to the range of the shipborne emission monitoring equipment to ensure accurate operation within the specified concentration range. Test items can be selected according to actual calibration needs, such as "Indication Error", "Repeatability", and "Response Time", and the measurement duration can be set manually. The "Ventilation Flow Rate" is set to 2 L / min by default and supports flow rate adjustment from 0.5 to 3.0 L / min. The "Ventilation Flow Rate" can be adjusted according to the actual flow rate requirements of the shipborne emission monitoring equipment. After configuring the equipment information, click the "Next" button to enter the standard gas information interface. You can enter the concentration parameters of standard gases on this interface. The software provides multiple standard gas channels (such as No. 1, No. 2, No. 3, and No. 4), and supports the entry of mixed standard gas information (such as SO2, NO, and CO2). Units can be selected as μmol / mol, %, mg / m³, etc. You can also take a photo of the standard gas information for archiving. If you have previously entered information under the "Standard Gas Configuration" menu, clicking the "Synchronize" button will synchronize the previously entered information to this interface.

[0113] Finally, after configuring the standard gas information, click the "Next" button to enter the calibration interface. After verifying that the required test items for the shipborne emission monitoring equipment are correct, click the "Start" button to begin calibration. The actual calibration process can be observed in the "Current Step" list in the upper right corner. At the bottom of the interface, information such as the measured values, test duration, and current flow rate into the shipborne emission monitoring equipment will be displayed simultaneously. A calibration report will be generated after the calibration process is complete. In case of an emergency, click the "Stop" button to end the current calibration process.

[0114] This embodiment demonstrates a standardized process for in-situ calibration of shipborne emission monitoring equipment, encompassing equipment transportation, on-site deployment, automated calibration, and report generation. By establishing a reliable gas path connection and data communication between the automated sampling device and the shipborne emission monitoring equipment, this method enables in-situ calibration of the monitoring equipment under actual ship operating conditions, effectively addressing the issue of low reliability in measurement results from shipborne emission monitoring equipment present in related technologies. The entire calibration process is intelligently guided by a handheld tablet, significantly lowering the technical threshold for operators and reducing human error. Simultaneously, standardized information entry, parameter configuration, and automated calibration procedures ensure the standardization and repeatability of the calibration process, while the automatically generated calibration report provides direct and reliable evidence for equipment status assessment and supervision. This method significantly improves the timeliness and accuracy of shipborne emission monitoring equipment calibration, providing a complete technical solution for ship emission supervision and ensuring the accuracy, reliability, and effectiveness of measurement traceability of monitoring data.

[0115] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0116] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0117] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. An in-situ calibration device for shipborne emission monitoring equipment, characterized in that, This includes automated samplers and shipboard emission monitoring equipment; The automatic sample feeding device includes a housing, a base plate, a partition, a standard gas cylinder, and a flow control unit; The base plate and the partition are respectively installed on the box body. When the base plate and the partition are opened, a standard gas frame is formed. The standard gas frame is used to fix the standard gas cylinder. The standard gas cylinder is connected to the air inlet pipe in the box to provide standard gas; The air intake pipe is connected to the flow control unit, and the flow control unit is connected to the air outlet pipe in the housing; The shipborne emission monitoring equipment is connected to the gas outlet pipe in the housing and is used to receive the standard gas; The shipborne emission monitoring equipment is used to receive the standard gas and perform calibration based on the standard gas to obtain calibration data.

2. The in-situ calibration device for shipborne emission monitoring equipment according to claim 1, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes a data interaction unit. The data interaction unit is connected to the communication unit of the shipborne emission monitoring equipment and is used to receive and process the calibration data.

3. The in-situ calibration device for shipborne emission monitoring equipment according to claim 2, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes a satellite system and engine sensors; The satellite system, connected to the data interaction unit, is used to provide real-time position and speed data of the ship; The engine sensor, connected to the data interaction unit, is used to provide operating data of the ship's engine.

4. The in-situ calibration device for shipborne emission monitoring equipment according to claim 2, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes a monitoring camera; The surveillance camera is connected to the data interaction unit to implement an electronic fence.

5. The in-situ calibration device for shipborne emission monitoring equipment according to claim 1, characterized in that, The shipborne emission monitoring equipment in-situ calibration device also includes a first air pipe, a second air pipe, and a communication interface installed on the housing. The first air tube is disposed between the standard gas cylinder and the air inlet pipe; The second air pipe is disposed between the shipborne emission monitoring equipment and the air outlet pipe; The communication interface is connected to the shipborne emission monitoring equipment and is used to send control commands to the shipborne emission monitoring equipment. The control command is used to set the shipborne emission monitoring equipment to enter calibration mode.

6. The in-situ calibration device for shipborne emission monitoring equipment according to claim 5, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes a pressure reducing valve. The pressure reducing valve is located between the standard gas cylinder and the first gas tube; Each of the standard gas cylinders is equipped with a pressure reducing valve and is connected to the corresponding air inlet pipe via the first gas pipe.

7. The in-situ calibration device for shipborne emission monitoring equipment according to claim 1, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes rubber shock-absorbing pads. The rubber shock-absorbing pads are installed on the housing to buffer the vibrations and impacts generated during the calibration process.

8. The in-situ calibration device for shipborne emission monitoring equipment according to claim 1, characterized in that, The flow control unit includes a filter pressure reducing unit, a precision air resistance module, a volumetric flow meter, and a micro flow path channel; The filtration and pressure reduction unit is connected to the precision gas resistance module through the micro-flow path channel, and is used to filter and reduce the pressure of the standard gas; The precision gas resistance module is connected to the volumetric flow meter through the micro flow path channel and is used to stabilize the pressure of the standard gas. The volumetric flow meter is used to control the flow rate of the standard gas at constant pressure or constant flow.

9. The in-situ calibration device for shipborne emission monitoring equipment according to claim 8, characterized in that, The volumetric flow meter includes a proportional valve and a flow-limiting orifice; The proportional valve, connected to the flow-limiting orifice, is used to regulate the flow rate of the standard gas; The flow-limiting orifice is used to generate a differential pressure signal to calculate the volumetric flow rate of the standard gas.

10. The in-situ calibration device for shipborne emission monitoring equipment according to claim 1, characterized in that, The in-situ calibration device for the shipborne emission monitoring equipment also includes a handle; The handle is provided on the box body and is used to transport the automatic sample feeding device when it is in the folded state.

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