In-situ calibration device and method for shipborne emission monitoring equipment

Abstract

The invention relates to an in-situ calibration device and method for shipborne emission monitoring equipment, and the in-situ calibration device for the shipborne emission monitoring equipment comprises an automatic sampling device and the shipborne emission monitoring equipment; the automatic sampling device comprises a box body, a bottom plate, a partition plate, a standard gas cylinder and a flow control unit; the bottom plate and the partition plate are respectively arranged on the box body and form a standard gas frame after being opened, and the standard gas frame is used for fixing a standard gas cylinder; the standard gas cylinder is connected with a gas inlet pipeline in the box body and is used for providing standard gas; the air inlet pipeline is connected with the flow control unit; the flow control unit is connected with the air outlet pipeline in the box body; the shipborne emission monitoring equipment is connected with the gas outlet pipeline in the box body and is used for receiving standard gas; and the shipborne emission monitoring equipment is used for receiving the standard gas and completing correction based on the standard gas to obtain calibration data. According to the invention, the problem that the reliability of the measurement result of the shipborne emission monitoring equipment is low in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, in particular to a device and method for in-situ calibration of a ship-mounted emission monitoring device. BACKGROUND

[0002] The booming development of water transportation is a powerful driving force for China's economic development, but at the same time, the pressure and challenge brought by ship air pollution emissions to regional air quality cannot be underestimated. The ship engine is mainly the second stage diesel engine, which will continuously emit sulfur oxides, nitrogen oxides and carbon-containing particulate matter and other air pollutants during navigation and berthing.

[0003] The scheme of ship emission exhaust detection can be divided into land-based, ship-based, unmanned aerial vehicle, etc. according to the principle. Among them, the ship-based is to install a ship-mounted emission monitoring device on the ship to monitor the emissions in real time during the navigation of the ship, which is playing an important role in preventing ship air pollution. The current scheme of ship-mounted emission monitoring device is to fixedly install online monitoring sensors on the ship for direct measurement, which cannot be calibrated in-situ, resulting in low reliability of the measurement results of the ship-mounted emission monitoring device.

[0004] In view of the problem of low reliability of the measurement results of the ship-mounted emission monitoring device in the related art, no effective solution has been proposed so far. SUMMARY

[0005] In this embodiment, a device and method for in-situ calibration of a ship-mounted emission monitoring device are provided to solve the problem of low reliability of the measurement results of the ship-mounted emission monitoring device in the related art.

[0006] In a first aspect, a device for in-situ calibration of a ship-mounted emission monitoring device is provided in this embodiment, comprising an automatic sampling device and a ship-mounted emission monitoring device.

[0007] The automatic sampling device comprises a box body, a bottom plate, a partition plate, a standard gas cylinder and a flow control unit;

[0008] The bottom plate and the partition plate are respectively arranged on the box body, and the bottom plate and the partition plate form a standard gas rack after being opened, and the standard gas rack is used for fixing the standard gas cylinder;

[0009] The standard gas cylinder is connected with the gas inlet pipeline in the box body for providing standard gas;

[0010] The gas inlet pipeline is connected with the flow control unit, and the flow control unit is connected with the gas outlet pipeline in the box body;

[0011] The ship-mounted emission monitoring device is connected with the gas outlet pipeline in the box body for receiving the standard gas;

[0012] The shipborne emission monitoring device is configured to receive the standard gas and complete calibration based on the standard gas to obtain calibration data.

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

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

[0015] In some embodiments, the shipborne emission monitoring device in-situ calibration device further comprises a satellite system and an engine sensor;

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

[0017] The engine sensor is connected to the data interaction unit and is configured to provide operation data of the engine of the ship.

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

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

[0020] In some embodiments, the shipborne emission monitoring device in-situ calibration device further comprises a first gas pipe, a second gas pipe and a communication interface arranged on the box body;

[0021] The first gas pipe is arranged between the standard gas cylinder and the gas inlet pipe;

[0022] The second gas pipe is arranged between the shipborne emission monitoring device and the gas outlet pipe;

[0023] The communication interface is connected to the shipborne emission monitoring device and is configured to send a control instruction to the shipborne emission monitoring device;

[0024] The control instruction is configured to set the shipborne emission monitoring device to enter a calibration mode.

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

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

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

[0028] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a rubber shock pad;

[0029] The rubber shock pad is arranged on the box body to buffer the vibration and impact generated during the calibration process.

[0030] In some embodiments, the flow control unit comprises a filter pressure reduction unit, a precision gas resistance module, a volumetric flow meter and a micro flow path channel;

[0031] The filter pressure reduction unit is connected with the precision gas resistance module through the micro flow path channel, and is used for filtering and reducing the pressure of the standard gas;

[0032] The precision gas resistance module is connected with the volumetric flow meter through the micro flow path channel, and is used for stabilizing the pressure of the standard gas;

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

[0034] In some embodiments, the volumetric flow meter comprises a proportional valve and a flow limiting hole;

[0035] The proportional valve is connected with the flow limiting hole, and is used for adjusting the flow of the standard gas;

[0036] The flow limiting hole is used for generating a pressure difference signal to calculate the volumetric flow of the standard gas.

[0037] In a second aspect, the present embodiment provides a shipborne emission monitoring equipment in-situ calibration method, which is suitable for the shipborne emission monitoring equipment in-situ calibration device of the first aspect, and the method comprises:

[0038] Placing a standard gas cylinder into a standard gas rack and opening the standard gas cylinder;

[0039] Communicating and connecting an automatic sampling device with the shipborne emission monitoring equipment;

[0040] Inputting basic information required by a calibration program;

[0041] Executing the calibration program based on the basic information to obtain the calibration data.

[0042] Compared with the related art, the shipborne emission monitoring equipment in-situ calibration device and method provided in the embodiment has the advantages that the shipborne emission monitoring equipment in-situ calibration device comprises an automatic sampling device and a shipborne emission monitoring equipment; the automatic sampling device comprises a box body, a bottom plate, a partition plate, a standard gas cylinder and a flow control unit; the bottom plate and the partition plate are arranged on the box body, and the bottom plate and the partition plate form a standard gas rack after being opened, and the standard gas rack is used for fixing the standard gas cylinder; the standard gas cylinder is connected with a gas inlet pipeline in the box body and is used for providing standard gas; the gas inlet pipeline is connected with the flow control unit, and the flow control unit is connected with a gas outlet pipeline in the box body; the shipborne emission monitoring equipment is connected with the gas outlet pipeline in the box body and is used for receiving the standard gas; and the shipborne emission monitoring equipment is used for receiving the standard gas and completing correction based on the standard gas to obtain calibration data. The automatic sampling device, the data interaction unit and the monitoring camera are cooperated to collect, store and wirelessly transmit the data of the shipborne emission monitoring equipment after pipeline connection, and the monitoring camera is used to realize the electronic fence function. The problem of low reliability of the measurement result of the shipborne emission monitoring equipment in the related art is solved.

[0043] The details of one or more embodiments of the present application are presented in the following drawings and description to make other features, objects and advantages of the present application more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0044] The drawings described herein are intended to provide further understanding of the present application, form a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0045] Figure 1 is a structural block diagram of the shipborne emission monitoring equipment in-situ calibration device provided by an embodiment of the present application;

[0046] Figure 2 is a structural schematic diagram of the automatic sampling device in a folded state provided by an embodiment of the present application;

[0047] Figure 3 is a structural schematic diagram of the automatic sampling device in an unfolded state provided by an embodiment of the present application;

[0048] Figure 4 is a bus protocol conversion technology model diagram of the data interaction unit provided by an embodiment of the present application;

[0049] Figure 5 is a flowchart of the shipborne emission monitoring equipment in-situ calibration method provided by an embodiment of the present application;

[0050] Figure 6 is a flowchart of the calibration method provided by an embodiment of the present application.

[0051] 100, automatic sampling device; 200, shipborne emission monitoring equipment; 300, data interaction unit; 400, monitoring camera; 500, satellite system; 600, engine sensor; 700, supervision platform; 101, air inlet pipeline; 102, handle; 103, power connector; 104, communication interface; 105, air outlet pipeline; 106, rubber damping pad; 107, bottom plate; 108, partition plate; 109, standard gas cylinder; 110, pressure reducing valve; 111, PU air pipe. DETAILED DESCRIPTION

[0052] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and explained below in conjunction with the drawings and examples.

[0053] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the general meaning understood by a person with ordinary skill in the art to which the present application belongs. In the present application, "one", "a", "an", "the", "these" and similar words do not represent a quantitative limitation, and they can be singular or plural. In the present application, the terms "include", "contain", "have" and any variants thereof are intended to cover non-exclusive inclusion; for example, a process, method and system, product or device containing a series of steps or modules (units) are not limited to the listed steps or modules (units), but can include steps or modules (units) not listed, or can include other steps or modules (units) inherent to the process, method, product or device. In the present application, the terms "connected", "connected", "coupled" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In the present application, "multiple" means two or more. The association between the associated objects is described by "and / or", which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. In general, the character " / " represents an "or" relationship between the associated objects. In the present application, the terms "first", "second", "third" and the like are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0054] In the present embodiment, a shipborne emission monitoring equipment in-situ calibration device is provided, Figure 1 is a structural block diagram of the shipborne emission monitoring equipment in-situ calibration device of the present embodiment. As Figure 1 shown, the device includes an automatic sampling device and a shipborne emission monitoring equipment;

[0055] The automatic sampling device includes a box body, a bottom plate, a partition plate, a standard gas cylinder and a flow control unit;

[0056] A bottom plate and a partition plate are arranged on the box body, and the bottom plate and the partition plate are opened to form a standard gas rack for fixing standard gas cylinders.

[0057] The standard gas cylinders are connected with the gas inlet pipeline in the box body to provide standard gas.

[0058] The gas inlet pipeline is connected with a flow control unit, and the flow control unit is connected with the gas outlet pipeline in the box body.

[0059] The shipborne emission monitoring equipment is connected with the gas outlet pipeline in the box body to receive standard gas.

[0060] The shipborne emission monitoring equipment is used to receive standard gas and complete calibration based on the standard gas to obtain calibration data.

[0061] Specifically, the automatic sampling device is used for storage, fixation, pressure regulation, and accurate flow control of standard gas, and stably delivers the standard gas to the shipborne emission monitoring equipment to be calibrated to provide reliable and known concentration gas reference for in-situ calibration. The structure of the automatic sampling device can be as shown in the figure. Figure 2 The automatic sampling device 100 has four gas inlet pipelines 101 above it for introducing standard gas, wherein the standard gas can be selected as four 4-liter standard steel cylinder gases as gas preparation raw materials, and according to the needs of the equipment to be calibrated, high, medium, and low concentration mixed (SO2, NO, CO2) standard gas and N2 zero gas of required components are prepared, and the type of the standard gas is not limited herein. The automatic sampling device has a gas outlet pipeline 105 on the side, and the gas outlet pipeline 105 is connected with the shipborne emission monitoring equipment 200 to be calibrated through a PU gas pipe. The bottom plate 107 can be rotated downward by 90° to be opened, and the partition plate 108 can be rotated upward by 90° to be opened, and the two are used to fix the standard gas cylinders 109 after being opened. The opening mode can also be sliding push-pull type or multi-section folding type, and the opening mode of the bottom plate and the partition plate is not limited herein.

[0062] The shipborne emission monitoring equipment is used to receive standard gas and complete automatic calibration based on the standard gas. When the shipborne emission monitoring equipment is connected with the automatic sampling device and enters the calibration mode, the analyzer inside the shipborne emission monitoring equipment receives the standard gas with known accurate concentration from the automatic sampling device, and measures the standard gas as a simulated "tail gas sample". The processor built in the equipment calculates and outputs a corresponding gas concentration measurement value through the built-in original algorithm or calibration curve which has not been calibrated. The measurement value is compared with the known reference concentration value of the introduced standard gas, and the key performance indicators such as indication error, repeatability, and response time of the shipborne emission monitoring equipment in the current state are calculated, and a more accurate correction curve is generated according to the performance indicators.

[0063] Through the embodiment, the expandable design of the box body, the bottom plate and the partition plate forms a stable standard gas cylinder fixing frame, ensuring the safety of the gas cylinder in a ship rocking environment; four independent gas inlet pipes support flexible configuration of multi-concentration standard gas; centralized arrangement of power connectors, communication interfaces and gas outlet pipes simplifies field wiring operation; rubber shock pads effectively alleviate the influence of ship vibration on precise gas path components. The integrated and portable design enables the device to be quickly deployed on the ship site, and through the standard gas provided by the standard gas cylinder and the precise flow control, the shipborne emission monitoring equipment is directly calibrated in situ, effectively solving the problem that the traditional calibration method cannot be calibrated in situ, resulting in low reliability of the measurement results of the shipborne emission monitoring equipment, significantly improving the timeliness and feasibility of the calibration of the shipborne emission monitoring equipment, and providing reliable technical support for ship emission supervision.

[0064] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a data interaction unit;

[0065] The data interaction unit is connected with the communication unit of the shipborne emission monitoring equipment, and is used for receiving and processing calibration data.

[0066] Specifically, as shown in Figure 1 , the data interaction unit 300 realizes data acquisition of the shipborne emission monitoring equipment through bus protocol conversion technology. As shown in Figure 4 , after obtaining the data frame at the link layer, the frame format is converted, the frame header and the frame tail of the bus protocol are removed, the required data is extracted, and the frame header and the frame tail of another bus protocol are added, and then loaded onto the physical layer for transmission. One end of the bus compatible device supports Ethernet, and the other end supports a plurality of other types of bus interfaces, realizing one-to-many protocol conversion. The bus protocol supports RS-232, RS-485, GPIB and CAN, etc., and the type of the bus protocol is not limited herein; the data interaction unit receives and stores the original response data from the shipborne emission monitoring equipment in real time, compares and analyzes the original response data with the standard gas concentration parameters input by the automatic sampling device, automatically completes the calculation of the indication error and the repeatability index, and automatically generates a calibration report according to the detection data, which is used to determine whether it is qualified. The data interaction unit can use a handheld tablet or an operation display screen as a carrier, and the form of the carrier is not limited herein.

[0067] Through this embodiment, based on the communication requirements of the shipborne emission monitoring equipment, the bus protocol conversion technology is used to develop the customization of bus compatible equipment, realize the consistency of the software and hardware data interaction API, and simplify the hardware interface of the upper software programming. The splitting and recombination of the frame header and frame tail of multiple bus protocols are supported, and the mutual conversion between multiple heterogeneous protocols is realized. At the same time, the introduction of the data interaction unit avoids the errors that may be introduced by traditional manual recording and calculation, greatly improves the efficiency and accuracy of data processing. All raw data and processing processes are recorded and saved completely, ensuring the authenticity and traceability of the calibration results, and providing direct and reliable electronic evidence for metrological traceability and supervision.

[0068] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a satellite system and an engine sensor;

[0069] The satellite system is connected with the data interaction unit, and is used to provide real-time position and speed data of the ship;

[0070] The engine sensor is connected with the data interaction unit, and is used to provide operation data of the ship engine.

[0071] Specifically, as shown in Figure 1 First, the satellite system 500 is connected with the data unit, and sends the real-time position (such as latitude and longitude coordinates) of the ship, the travel speed (such as the ground speed) and the like to the data interaction unit. The satellite system can be Beidou, GPS or Galileo, and the type of the satellite system and the type of data provided by the satellite system are not limited here.

[0072] Secondly, the engine sensor 600 is connected with the data interaction unit, and sends the operation data of the engine sensor to the data interaction unit. The operation data can be engine speed, load and exhaust emission concentration, and the type of data provided by the engine sensor is not limited here.

[0073] Finally, the data interaction unit uses wireless communication technology to regularly send the collected data to the supervision platform 700, and these data include the basic information of the ship name, IMO number, real-time position, travel speed and the like, and the key data of the exhaust emission concentration. At the same time, the supervision platform can also remotely issue instructions to the data interaction unit to obtain the data of the ship emission in real time.

[0074] Through the embodiment, the calibration data can be accurately corresponded to specific navigation conditions (such as cruising, acceleration, and berthing), and the monitoring accuracy of the shipborne emission monitoring equipment under different conditions is verified. Meanwhile, all calibration operations and results are given accurate time and space stamps, a complete data chain is constructed, accurate metrological data support with strong space-time correlation is provided for regional emission supervision and control zone regulation compliance verification, and the pertinence and effectiveness of supervision are significantly improved.

[0075] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a monitoring camera;

[0076] The monitoring camera is connected with the data interaction unit and is used to realize electronic fence.

[0077] Specifically, as shown in Figure 1 The monitoring camera 400 is used to realize the electronic fence function. First, before the calibration operation starts, a physical area (such as a range of 1-2 meters around the automatic sampling device) that needs to be protected is manually delimited in the real-time picture of the monitoring camera through the software interface of the data interaction unit, and a non-visible "virtual fence" is generated, and the area is the protected calibration work area. Secondly, once an abnormal situation such as unauthorized personnel entering, standard device failure or experimental environment parameter deviating from the set range occurs, the system will automatically trigger an alarm, discard the current detection data, abort the detection program, and enter the abnormality processing flow. This mechanism can effectively ensure that the calibration process is not disturbed and the detection behavior is standardized and fair, thereby preventing illegal tampering of the equipment or parameters.

[0078] Through the embodiment, the monitoring camera is introduced to realize automatic monitoring of the whole process of the calibration site without dead angles, and a security protection system combining physical space and digital management is formed. The electronic fence function can intelligently identify unauthorized intervention, equipment abnormalities and environmental parameter out-of-range risks, and automatically trigger a three-level linkage protection mechanism including data discarding, process aborting and state alarming. The interference of human factors on the calibration process is fundamentally eliminated, and the standardization of the detection behavior and the authenticity of the results are ensured.

[0079] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a first gas pipe, a second gas pipe and a communication interface arranged on the box body;

[0080] The first gas pipe is arranged between the standard gas cylinder and the gas inlet pipeline;

[0081] The second gas pipe is arranged between the shipborne emission monitoring equipment and the gas outlet pipeline;

[0082] The communication interface is connected with the shipborne emission monitoring equipment and is used to send control instructions to the shipborne emission monitoring equipment;

[0083] Control instructions for setting the shipboard emission monitoring device into calibration mode.

[0084] Specifically, the first air pipe and the second air pipe are made of PU material with corrosion resistance and aging resistance, and have good flexibility and air tightness. The air pipe material can also be polyurethane, fluororubber, polytetrafluoroethylene, etc. The air pipe material is not limited here. At the same time, the air pipe can also use rigid quick connector, multi-channel fluid connection plate and other ways to realize tubeless design. The way of air connection is not limited here; the communication interface establishes communication connection with different models of shipboard emission monitoring devices, and is used to send control instructions. The structure can be as shown in Figure 2 The handle 102 above the device facilitates handling when the device is in a folded state. The power connector 103 needs to be connected to an alternating current power supply that can provide at least 1.5 A output current, and the power supply should have good grounding. The control instructions include device mode switching, range selection, and data acquisition trigger instructions.

[0085] Through this embodiment, a complete air connection and data interaction channel is established between the automatic sampling device and the shipboard emission monitoring device. The standard gas enters the flow control unit through the first air pipe and the gas inlet pipeline, and is stably delivered to the calibrated device after accurate control through the second air pipe. At the same time, through the standardized communication interface and special control instructions, the working mode of the shipboard monitoring device is remotely set and controlled. This dual connection scheme ensures the synchronization and coordination of standard gas and information flow during calibration, realizes the high automation of the entire calibration process, significantly reduces the human operation link, improves the calibration efficiency, and maximizes the error introduced by human factors, ensuring the accuracy and reliability of the calibration results.

[0086] In some embodiments, the shipboard emission monitoring device in-situ calibration device further comprises a pressure reducing valve;

[0087] The pressure reducing valve is arranged between the standard gas cylinder and the first air pipe;

[0088] Each standard gas cylinder is equipped with a pressure reducing valve and connected to the corresponding gas inlet pipeline through the first air pipe.

[0089] Specifically, the pressure reducing valve is a precision mechanical pressure reducing device, and its structure can be as shown in Figure 3 Each standard gas cylinder 109 is equipped with a pressure reducing valve 110 connected to the corresponding gas inlet pipeline 101 through the PU air pipe 111. The input end is directly connected to the outlet of the standard gas cylinder, and the output end is connected to the gas inlet pipeline of the automatic sampling device through the first air pipe; the pressure reducing valve can stably reduce the high pressure gas in the standard gas cylinder to the safe low pressure working range required by the subsequent flow control unit.

[0090] By this embodiment, a pressure reducing valve is independently provided for each standard gas cylinder, realizing pressure regulation from the gas source end. Not only does it ensure operation safety and effectively avoid the risk of equipment damage caused by high-pressure gas directly entering the calibration system, but it also provides a stable inlet pressure condition for the downstream flow control unit, reducing the impact of natural pressure drop or fluctuations in the cylinder pressure on the final output gas flow accuracy from the source, thereby ensuring the stability and reliability of standard gas supply throughout the calibration process, providing support for obtaining accurate calibration results.

[0091] In some embodiments, the shipborne emission monitoring equipment in-situ calibration device further comprises a rubber shock pad;

[0092] The rubber shock pad is arranged on the box body and used for buffering vibration and impact generated in the calibration process.

[0093] Specifically, the rubber shock pad is used for shock absorption and anti-skid, and its structure can be as shown in Figure 2 The rubber shock pad 106 is made of high-damping rubber material and is fixedly arranged at the bottom of the box body. The material of the shock pad can also be silicone rubber, neoprene rubber or composite damping material, and the arrangement mode can be full coverage or multi-point matrix. The material and arrangement mode of the shock pad are not limited herein. The structure of the shock pad is characterized by having two parallel mounting planes and an elastic support structure in the middle, which can effectively absorb and attenuate multidirectional vibration from the ship deck.

[0094] By this embodiment, the use of the rubber shock pad significantly improves the adaptability and reliability of the device in the ship vibration environment. Through physical isolation and energy absorption, the adverse effects of continuous vibration such as ship engine operation and wave impact on the internal precision gas path components and connecting pipelines of the automatic sampling device are effectively reduced, preventing connection loosening, gas path leakage or control element measurement misalignment caused by vibration. The long-term stability of standard gas flow control is ensured, and the measurement accuracy and result reliability of the shipborne emission monitoring equipment in-situ calibration are ensured.

[0095] In some embodiments, the flow control unit comprises a filtering pressure reducing unit, a precision gas resistance module, a volumetric flow meter and a micro flow path channel;

[0096] The filtering pressure reducing unit is connected with the precision gas resistance module through the micro flow path channel and used for filtering and reducing the pressure of the standard gas;

[0097] The precision gas resistance module is connected with the volumetric flow meter through the micro flow path channel and used for stabilizing the pressure of the standard gas;

[0098] The volumetric flow meter is used for constant pressure or constant flow control of the flow of the standard gas.

[0099] Specifically, the filter and pressure reduction unit first removes impurities in the gas and reduces the high pressure output by the gas cylinder to a stable pressure; the precision gas resistance module, through its fixed flow resistance characteristics, damps and absorbs pressure fluctuations, providing smooth input conditions; the volumetric flow meter uses an electronic pressure controller to achieve closed-loop control of the flow; the micro flow path channel connects each component in an integrated manner, greatly reducing the system dead volume.

[0100] Through this embodiment, the modular integrated gas circuit design is adopted to realize the miniaturization and high performance of the calibration device. The filter and pressure reduction unit ensures the purity and pressure stability of the gas, the precision gas resistance module provides ideal working conditions for flow control, and the volumetric flow meter based on the electronic pressure controller realizes accurate constant current or constant voltage output. In particular, the application of the micro flow path channel not only reduces the volume of the device, but also significantly improves the response speed of the system and reduces the gas replacement time. This integrated flow control scheme can maintain long-term stable metering performance in harsh environments such as ship vibration, ensuring the accuracy and reliability of the calibration results of the shipborne emission monitoring equipment.

[0101] In some embodiments, the volumetric flow meter includes a proportional valve and a flow restriction orifice;

[0102] The proportional valve is connected with the flow restriction orifice and is used to adjust the flow of the standard gas;

[0103] The flow restriction orifice is used to generate a pressure difference signal to calculate the volumetric flow of the standard gas.

[0104] Specifically, the proportional valve is a self-developed electrically controlled regulating valve, the opening of which is accurately controlled by the control signal sent by the data interaction unit; the flow restriction orifice is a precision component with a fixed aperture, which forms a stable pressure difference before and after the gas flows through it; the pressure difference signal is collected and transmitted to the data processing module in real time, and through a pre-calibrated flow-pressure difference relationship curve, the accurate volumetric flow value is calculated, and then a closed-loop control loop is formed.

[0105] Through this embodiment, the combination scheme of proportional valve and flow restriction orifice is adopted to realize low-cost and high-precision gas flow control. The proportional valve as an actuator realizes rapid and accurate adjustment of the flow, and the flow restriction orifice as a measuring element provides a reliable flow feedback signal. The advantage of the self-developed flow meter is that the flow measurement method based on the pressure difference principle is simple in structure, high in reliability, and easy to integrate with the device, which can realize low-cost and rapid deployment; at the same time, it supports PLC or single-chip microcomputer programming, custom control logic, no complex sensors, low maintenance threshold, suitable for harsh working conditions, and meets the requirements of in-situ calibration of shipborne emission monitoring equipment, providing technical support for miniaturization and backpackization of the device.

[0106] 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:

[0107] Step S210: Place the standard gas cylinder into the standard gas rack and open the standard gas cylinder;

[0108] Step S220: Connect the automatic sampler to the shipborne emission monitoring equipment.

[0109] Step S230: Enter the basic information required for the calibration procedure;

[0110] Step S240: Perform the calibration procedure based on the basic information to obtain calibration data.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] Secondly, after information input, click the "next" button to enter the shipboard emission monitoring equipment information configuration interface. This interface can set the range and unit of the shipboard emission monitoring equipment. Each gas contains "range information" and "unit" two settings. For example, the range and unit of SO2 can be set to 1000 pmol and mol. The settings can be modified according to the range of the shipboard emission monitoring equipment to ensure accurate work within the specified concentration range. Test items can be checked according to actual calibration needs, such as "indication error", "repeatability", "response time" and other items, and the measurement time can be set by yourself. The default "ventilation flow" is set to 2L / min, and the flow adjustment of 0.5~3.0L / min is supported, and the "ventilation flow" can be adjusted according to the actual demand flow of the shipboard emission monitoring equipment. After the information configuration of the equipment to be tested is completed, click the "next" button to enter the standard gas information interface. The concentration parameters of the standard gas can be input in this interface. The software provides multiple standard gas channels (such as 1#, 2#, 3# and 4#), supports mixed standard gas information input (such as SO2, NO and CO2, etc.), the unit can choose pmol / mol, %, mg / m³, etc., and the standard gas information can be photographed for archiving. If the information has been input before in the "standard gas configuration" menu, click the "synchronize" button to synchronize the information input last time to this interface.

[0116] Finally, after the standard gas information configuration is completed, click the "next" button to enter the calibration interface. After verifying that the required test items of the shipboard emission monitoring equipment are correct, click the "start" button to calibrate. In the upper right corner "current step" list, you can observe the actual calibration action. In the lower part of the interface, the measurement value, test time and current flow into the shipboard emission monitoring equipment of the shipboard emission monitoring equipment will be displayed simultaneously. After waiting for the calibration process to end, the calibration report is generated. If an emergency occurs, you can click the stop button to end the current calibration process.

[0117] Through the embodiment, the shipborne emission monitoring equipment in-situ calibration method realizes the full-process standardized operation from equipment transportation, field deployment to automatic calibration and report generation. The method realizes the in-situ calibration of the monitoring equipment in the actual operation environment of the ship by establishing reliable gas connection and data communication between the automatic sampling device and the shipborne emission monitoring equipment, effectively solving the problem of low reliability of the measurement results of the shipborne emission monitoring equipment in the related art. The entire calibration process is intelligently guided through a handheld tablet, greatly reducing the technical threshold of the operator and reducing human operation errors. At the same time, the standardized information input, parameter configuration and automatic calibration process ensure the standardization and repeatability of the calibration process, and the automatically generated calibration report provides a direct and reliable basis for equipment state evaluation and supervision. The method significantly improves the timeliness and accuracy of the calibration of the shipborne emission monitoring equipment, provides a complete technical solution for ship emission supervision, and guarantees the accuracy and reliability of the monitoring data and the effectiveness of the quantity traceability.

[0118] It should be understood that the specific embodiments described herein are merely exemplary and not intended to limit the application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided herein without creative labor are within the scope of the present application.

[0119] Obviously, the drawings are only some examples or embodiments of the present application, and those skilled in the art can also apply the present application to other similar situations without creative labor. In addition, it can be understood that although the work done in the development process may be complex and long, some design, manufacture or production changes made by those skilled in the art according to the technical content disclosed in the present application are only routine technical means and should not be regarded as insufficient disclosure of the present application.

[0120] The term "embodiment" in the present application means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The presence of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean independence or alternative to other embodiments. It can be clearly or implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments without conflict.

[0121] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent protection scope. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An apparatus for in situ calibration of a shipboard exhaust monitoring device, comprising: The device comprises an automatic sampling device and a shipborne emission monitoring equipment; The automatic sampling device comprises a box, a bottom plate, a partition plate, standard gas cylinders and a flow control unit; The bottom plate and the partition plate are arranged on the box respectively, and the bottom plate and the partition plate form a standard gas rack after being opened, and the standard gas rack is used for fixing the standard gas cylinders; The standard gas cylinders are connected with the gas inlet pipeline in the box for providing standard gas; The gas inlet pipeline is connected with the flow control unit, and the flow control unit is connected with the gas outlet pipeline in the box; The shipborne emission monitoring equipment is connected with the gas outlet pipeline in the box for receiving the standard gas; The shipborne emission monitoring equipment is used for receiving the standard gas and completing correction based on the standard gas to obtain calibration data.

2. The apparatus according to claim 1, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a data interaction unit; The data interaction unit is connected with the communication unit of the shipborne emission monitoring equipment for receiving and processing the calibration data.

3. The apparatus according to claim 2, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a satellite system and an engine sensor; The satellite system is connected with the data interaction unit for providing real-time position and speed data of the ship; The engine sensor is connected with the data interaction unit for providing operation data of the engine of the ship.

4. The apparatus according to claim 2, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a monitoring camera; The monitoring camera is connected with the data interaction unit for realizing electronic fence.

5. The apparatus according to claim 1, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a first gas pipe, a second gas pipe and a communication interface arranged on the box; The first gas pipe is arranged between the standard gas cylinders and the gas inlet pipeline; The second gas pipe is arranged between the shipborne emission monitoring equipment and the gas outlet pipeline; The communication interface is connected with the shipborne emission monitoring equipment for sending control instructions to the shipborne emission monitoring equipment; The control instructions are used for setting the shipborne emission monitoring equipment to enter calibration mode.

6. The apparatus according to claim 5, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a pressure reducing valve; The pressure reducing valve is arranged between the standard gas cylinders and the first gas pipe; Each of the standard gas cylinders is provided with one pressure reducing valve and connected to the corresponding gas inlet pipeline through the first gas pipe.

7. The apparatus according to claim 1, wherein, The in-situ calibration device for the shipborne emission monitoring equipment further comprises a rubber shock pad; The rubber shock pad is arranged on the box for buffering vibration and impact generated in the calibration process.

8. The apparatus according to claim 1, wherein, The flow control unit comprises a filtering and pressure reducing unit, a precision gas resistance module, a volumetric flow meter and a micro flow channel; The filtering and pressure reducing unit is connected with the precision gas resistance module through the micro flow channel for filtering and pressure reducing the standard gas; The precision gas resistance module is connected with the volumetric flow meter through the micro flow channel for stabilizing the pressure of the standard gas; The volumetric flow meter is used for constant pressure or constant flow control of the flow of the standard gas.

9. The on-board emissions monitoring apparatus in situ calibration device of claim 8, wherein, The volumetric flow meter comprises a proportional valve and a flow limiting hole; The proportional valve is connected with the flow limiting hole for adjusting the flow of the standard gas; The flow limiting hole is used to generate a pressure difference signal to calculate the volume flow of the standard gas.

10. A method of in-situ calibration of a shipboard emissions monitoring apparatus, characterised in that, The method is suitable for the in-situ calibration device of the shipborne emission monitoring equipment as claimed in any one of claims 1 to 9, and the method comprises: putting a standard gas cylinder into a standard gas rack and opening the standard gas cylinder; communicating the automatic sampling device with the shipborne emission monitoring equipment; inputting basic information required by a calibration program; executing the calibration program based on the basic information to obtain the calibration data.

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