Metering method, metering system and storage medium for ground service system

Abstract

The present invention discloses a metering method, system and storage medium for a ground service system, the method comprising: when a service request instruction triggered by an aircraft parked at an airport apron parking space is detected, a target subsystem corresponding to the aircraft is determined from multiple subsystems; based on a detection device in the target subsystem, the target subsystem measures the amount of electricity corresponding to the power supply provided to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft. The present invention sets a corresponding detection device for a ground service system for providing power, clean water, air conditioning and treating sewage for an aircraft, and quantitatively measures the amount of electricity, cooling and heating, clean water, and sewage treated provided to the aircraft through the detection device, so that the measurement is more accurate, and then the accurate billing of the power, air conditioning, clean water and sewage treatment provided in the ground service can be realized based on the specific data of the measurement.

Description

Technical Field

[0001] The present invention relates to the field of airport application technology, and in particular to a metering method, a metering system and a storage medium for a ground service system. Background Art

[0002] With the rapid development of the civil aviation industry, passenger and cargo aviation have increased exponentially, and ground services in airport operations are also facing challenges. Ground services mainly include providing power, air conditioning, sewage treatment, and clean water, so that the aircraft can be inspected, maintained, and replenished at the airport apron before takeoff, ensuring the safe flight of the aircraft and providing comfortable services for passengers.

[0003] Usually, ground services are provided by the airport, and after providing them, the airport settles the fees with the airline to which the aircraft belongs in a certain way. For example, for the power supply and air conditioning provided, the fees are usually calculated according to the downtime and aircraft type between the arrival of the previous flight and the departure of the current flight in the flight information, and for clean water and sewage, the fees are calculated according to the aircraft type and number of times. However, during the flight, due to factors such as weather, airspace control, and aircraft deployment, flight delays, flight changes, and flight cancellations often occur. There may also be emergencies that lead to temporary deployment of airport parking spaces, and non-flight aircraft maintenance occupying airport parking spaces. As a result, the downtime determined based on the flight information may be inaccurate, resulting in a large difference between the calculation of the fees for the power supply and air conditioning provided and the actual difference. The per-time billing method for clean water and sewage also has the problem of inaccuracy.

[0004] Therefore, how to quantitatively measure the air conditioning and heating, power supply, clean water and sewage treated volume provided by ground services, so as to provide an accurate basis for service billing, is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The main purpose of the present invention is to provide a metering method, a metering system and a storage medium for a ground service system, aiming to solve the technical problem of how to quantitatively measure the air conditioning heating and cooling capacity, power supply, clean water volume and treated sewage volume provided by the ground service, so as to provide an accurate basis for service billing.

[0006] To achieve the above-mentioned object, the present invention provides a metering method for a ground service system, wherein the ground service system is arranged in an underground pipe gallery of an airport apron, and comprises a plurality of subsystems, each of which corresponds to a parking space in the airport apron, and is used to provide power, clean water, air conditioning, and sewage treatment for an aircraft parked at the parking space;

[0007] The measurement method includes:

[0008] When a service request instruction triggered by an aircraft parked at a parking space on an airport apron is detected, a target subsystem corresponding to the aircraft is determined from the plurality of subsystems;

[0009] Based on the detection device in the target subsystem, the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft are measured.

[0010] Preferably, the target subsystem includes a power subsystem, a clean water subsystem, a sewage subsystem, and an air conditioning subsystem, and the detection device includes an electric quantity detection device, a clean water flow meter, a sewage flow meter, and an air conditioning detection device;

[0011] The step of measuring the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem includes:

[0012] Obtaining a transformation ratio corresponding to a current transformer in the current detection device and a reading of an electric meter in the current detection device, and calculating the amount of electricity provided by the power subsystem to the aircraft based on the transformation ratio and the reading;

[0013] Acquire a clean water measurement value detected by the clean water flow meter and a clean water reference error interval corresponding to the clean water measurement value, and correct the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft;

[0014] Acquire a sewage measurement value detected by the sewage flow meter and a sewage reference error interval corresponding to the sewage measurement value, and correct the sewage measurement value based on the sewage reference error interval to obtain a sewage volume treated by the sewage subsystem on the aircraft;

[0015] The wind speed value, temperature value, humidity value and pressure value detected by the anemometer, thermometer, hygrometer and pressure gauge in the air conditioning detection device are obtained, and the cooling and heating amount provided by the air conditioning subsystem to the aircraft is determined according to the wind speed value, temperature value, humidity value and pressure value.

[0016] Preferably, the air conditioning subsystem comprises an air inlet and an air outlet, the temperature value comprises an air inlet dry bulb temperature corresponding to the air inlet and an air outlet dry bulb temperature corresponding to the air outlet, the humidity value comprises an air inlet air humidity content and an air outlet air humidity content, and the pressure value comprises a first end pressure value and a second end pressure value of an air conditioning duct in the air conditioning subsystem that is connected to the aircraft;

[0017] The step of determining the cooling and heating amount provided by the air conditioning subsystem to the aircraft according to the wind speed value, the temperature value, the humidity value and the pressure value comprises:

[0018] Acquire the geographical location information of the aircraft, and the local atmospheric pressure and air density corresponding to the geographical location information, and generate the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure;

[0019] Generating an enthalpy value of the inlet air according to the inlet dry-bulb temperature and the inlet air humidity, and generating an enthalpy value of the outlet air according to the outlet dry-bulb temperature and the outlet air humidity;

[0020] The cooling and heating amount is determined according to the air flow, the inlet air enthalpy value, the outlet air enthalpy value, the air density and the moisture content of the air at the air outlet.

[0021] Preferably, the step of generating the air flow rate of the air outlet in the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure comprises:

[0022] Generate the first end pressure value and the second end pressure value as the relative pressure difference of the air conditioning pipeline, and find a reference pressure difference coefficient corresponding to the relative pressure difference;

[0023] Finding a reference temperature coefficient corresponding to the dry-bulb temperature of the air outlet and a reference factor coefficient corresponding to the anemometer;

[0024] The air flow rate at the air outlet of the air conditioning subsystem is calculated according to the first cross-sectional area of ​​the air conditioning duct, the wind speed value, the local atmospheric pressure, the reference pressure difference coefficient, the reference temperature coefficient, and the reference factor coefficient. The calculation formula is:

[0025]

[0026] Among them, q is the air flow rate, C is the wind speed value, A1 is the first cross-sectional area, P1 is the reference pressure difference coefficient, P3 is the standard atmospheric pressure, P2 is the local atmospheric pressure, w is the reference temperature coefficient, n is the number of anemometer's own factors, and ki is the reference factor coefficient corresponding to the i-th own factor.

[0027] Preferably, the step of calculating the amount of electricity provided by the power subsystem to the aircraft comprises:

[0028] Obtaining mutual inductance parameters of the current transformer, the mutual inductance parameters including winding impedance of the secondary winding, load impedance, average length of the iron core magnetic circuit, second cross-sectional area of ​​the iron core, number of turns of the secondary winding, electromotive force on the secondary side, input current frequency, hysteresis angle of the iron core, and impedance angle of the secondary winding;

[0029] Finding a core loss coefficient corresponding to the current transformer, and determining a magnetic density corresponding to the current transformer according to the core loss coefficient, the electromotive force, the input current frequency, the number of turns and the second cross-sectional area, and determining a magnetic permeability corresponding to the current transformer according to the magnetic density and the magnetic field strength corresponding to the current transformer;

[0030] According to the winding impedance, load impedance, average length, input current frequency, number of turns, magnetic permeability and second cross-sectional area, the error parameter of the current transformer is calculated, and the calculation formula is:

[0031]

[0032] Wherein, γ represents the error parameter, Z1 represents the winding impedance, Z2 represents the load impedance, L represents the average length, f represents the input current frequency, N2 represents the number of turns, u represents the magnetic permeability, and A2 represents the second cross-sectional area;

[0033] The ratio difference and the angle difference of the current transformer are determined according to the error parameter, the hysteresis angle and the impedance angle, and the electrical quantity is corrected according to the ratio difference and the angle difference.

[0034] Preferably, the step of correcting the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft comprises:

[0035] Generate the clean water reference error interval as an average error flow rate, and obtain the clean water reference temperature and reference pressure corresponding to the clean water reference flow rate interval, and the clean water current temperature and current pressure corresponding to the clean water flow meter;

[0036] Based on the average error flow rate, the clean water reference temperature, the reference pressure, and the current clean water temperature and the current pressure, a correction flow rate corresponding to the average error flow rate is calculated, and the calculation formula is:

[0037] V=Vs*[1-(C1-C2)]*[1+(D1-D2)];

[0038] Wherein, V represents the corrected flow rate, Vs represents the average error flow rate, C1 represents the reference temperature of clean water, C2 represents the current temperature of clean water, D1 represents the reference pressure, and D2 represents the current pressure;

[0039] The clean water measurement value is corrected according to the corrected flow rate to obtain the clean water volume.

[0040] Preferably, the step of determining the target subsystem corresponding to the aircraft from the plurality of subsystems comprises:

[0041] Outputting the metering modes of the clean water volume, the sewage volume and the cooling and heating volume respectively, and accepting the selection instructions returned based on each of the metering modes respectively;

[0042] If the metering mode corresponding to the clean water volume and the sewage volume in the selection instruction is metering by times, the operation times of the clean water subsystem and the sewage subsystem corresponding to the aircraft are counted respectively, and the clean water volume and the sewage volume are measured respectively according to each of the operation times;

[0043] If the metering mode corresponding to the cooling and heating amount in the selection instruction is time-based metering, the operation time of the air-conditioning subsystem is counted, and the cooling and heating amount is measured according to the operation time;

[0044] If the metering mode corresponding to the selection instruction does not include metering by time and metering by time, the steps of measuring the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of fresh water, and the amount of sewage treated in the aircraft are performed based on the detection device in the target subsystem.

[0045] Preferably, the step of counting the operating time of the air-conditioning subsystem and measuring the cooling and heating amount according to the operating time includes:

[0046] Identifying the start time and stop time of the air conditioning subsystem, and determining the operation time of the air conditioning subsystem according to the start time and stop time;

[0047] Obtaining a reference input flow, a reference input temperature, a reference input humidity, and current weather data corresponding to the aircraft, and finding a unit cooling and heating capacity corresponding to the reference input flow, the reference input temperature, the reference input humidity, and the current weather data,

[0048] Predicting the cooling and heating capacity according to the operating time and the unit cooling and heating capacity to obtain a prediction result;

[0049] The length, first cross-sectional area, and temperature difference between both ends of the air-conditioning duct in the air-conditioning subsystem connected to the aircraft, as well as the air density and air specific heat capacity corresponding to the geographical location of the aircraft are obtained, and the loss value of the duct is calculated according to the length, first cross-sectional area, temperature difference between both ends, air density, and air specific heat capacity, and the calculation formula is:

[0050] δ=(ρ*σ*(A1*L)*(Δt));

[0051] Among them, δ represents the loss value, ρ represents the air density, σ represents the specific heat capacity of air, A1 represents the first cross-sectional area, L represents the length of the pipeline, and Δt represents the temperature difference between the two ends;

[0052] The prediction result is corrected according to the loss value to obtain the cooling and heating amount.

[0053] Furthermore, to achieve the above-mentioned object, the present invention also provides a metering system for a ground service system, the metering system comprising a server and a communication bus, the server being communicatively connected to the ground service system via the communication bus;

[0054] The server includes a processor and a memory connected to the processor in communication, wherein a control program is stored in the memory:

[0055] The processor is used to execute the control program to implement the steps of the metering method for the ground service system as described above.

[0056] Furthermore, to achieve the above-mentioned purpose, the present invention also provides a storage medium, on which a control program is stored, and when the control program is executed by a processor, the steps of the metering method for a ground service system as described above are implemented.

[0057] The present invention is used for a metering method, a metering system and a storage medium for a ground service system. The ground service system is arranged in an underground pipe gallery of an airport apron and includes a plurality of subsystems. Each subsystem corresponds to a parking space in the airport apron and is used to provide power, clean water, air conditioning and sewage treatment for the aircraft parked at the parking space. When a service request instruction triggered by an aircraft parked at a parking space in the airport apron is detected, indicating that the aircraft has stopped at a parking space in the airport apron and needs ground service, a subsystem corresponding to the parking space is searched from a plurality of subsystems as a target subsystem for providing ground service to the aircraft. In addition, each subsystem is provided with a detection device, so that the target subsystem can quantitatively measure the power consumption of the power supply provided by the target subsystem to the aircraft, the cooling and heating capacity of the air conditioner, the amount of clean water, and the amount of sewage treated, and then perform service billing according to the specific data of the measurement, so as to realize accurate billing of the power supply, air conditioning, clean water and sewage treatment provided in the ground service. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a flow chart of a first embodiment of a metering method for a ground service system according to the present invention;

[0059] Figure 2It is a flow chart of a second embodiment of a metering method for a ground service system according to the present invention;

[0060] Figure 3 It is a flow chart of a third embodiment of a metering method for a ground service system according to the present invention;

[0061] Figure 4 It is a structural schematic diagram of the hardware operating environment involved in an embodiment of a metering system for a ground service system of the present invention.

[0062] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0064] The present invention provides a metering method for a ground service system, wherein the ground service system is arranged in an underground corridor of an airport apron, and comprises a plurality of subsystems, each of which corresponds to a parking space in the airport apron, and is used to provide power, clean water, air conditioning, and sewage treatment for an aircraft parked at the parking space.

[0065] Please refer to Figure 1 , Figure 1 The figure is a flow chart of the first embodiment of the metering method for a ground service system of the present invention. It should be noted that although the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than that shown here. Specifically, the metering for a ground service system in this embodiment includes:

[0066] Step S10, when a service request instruction triggered by an aircraft parked at a parking space on an airport apron is detected, a target subsystem corresponding to the aircraft is determined from the plurality of subsystems.

[0067] The metering method for the ground service system in this embodiment is applied to the server of the ground service system. Each subsystem of the ground service system is provided with a detection device, a control device and a display device for detecting and measuring. The detection device is such as a thermometer, a hygrometer, an electric energy meter, a flow meter, etc., the control device is such as a PLC (Programmable Logic Controller), and the display device is such as an HMI (Human Machine Interface). Each subsystem can be connected to the server through a control device for communication, or through a detection device for communication with the server. For the connection through the control device, the detection device uniformly transmits the detection data to the control device of the subsystem, and the control device of the subsystem uniformly transmits it to the server for analysis and processing. For the connection method through the detection device, the detection device transmits the detected data to the server for analysis and processing. Among them, the control device in the subsystem can control the detection device in addition to communicating and transmitting data, and the display device is used to display the control status of the detection device and the metering data after analysis and processing.

[0068] It should be noted that the ground service system is set up in the underground corridor of the airport apron. The underground corridor can be the original underground corridor of the airport apron, or it can be an underground corridor expanded on the basis of the original underground corridor, and there is no restriction on this. The airport apron contains multiple parking spaces for parking aircraft, and the ground service system correspondingly includes multiple subsystems, and each parking space corresponds to a subsystem, so as to provide power, clean water, air conditioning, and sewage treatment for the aircraft parked at the parking space through the subsystem. In addition, considering that the aircraft models parked at the parking space may be different, in order to adapt to different aircraft models, multiple subsystems can be set for the same parking space. Alternatively, a corresponding backup subsystem is set for the same subsystem, so that when the subsystem fails, the backup subsystem can provide ground services for the parked aircraft.

[0069] Furthermore, each subsystem includes a hydraulic drive subsystem, a power subsystem, a clean water subsystem, a sewage subsystem and an air conditioning subsystem. The hydraulic subsystem is connected to the power subsystem, the clean water subsystem, the sewage subsystem and the air conditioning subsystem through hydraulic pipelines to drive the power subsystem, the clean water subsystem, the sewage subsystem and the air conditioning subsystem to provide power, clean water, sewage treatment and air conditioning for the aircraft parked at the parking position.

[0070] Understandably, in order to provide power, clean water, air conditioning, and sewage treatment, each subsystem must include a variety of equipment sources, pipelines, and elevators for lifting the subsystem from the underground corridor. Among them, the equipment sources include at least power equipment, air conditioning cabinets, compressed air stations, air conditioning units, sewage vacuum pump stations, clean water pump stations, flushing water pump stations, etc. Pipelines can be used to connect various equipment sources and transport them to the apron through elevators, including at least power supply cables, oil pipes, compressed air pipes, sewage pipes, water supply pipes, air conditioning chilled water pipes, etc. The elevator is installed and connected to the terminal interfaces of various equipment sources through various pipelines. It is in a descending state when not working, and the upper surface is flush with the airport apron. After the aircraft is parked at the parking position on the apron, it is controlled to switch to the working state and rise to provide the aircraft with corresponding power, clean water, air conditioning, and sewage treatment.

[0071] Furthermore, after an aircraft that needs to land determines a parking stand that supports its parking and parks steadily at the parking stand, it can trigger a service request instruction. After receiving the service request instruction indicating that the aircraft has a need for ground service, the server identifies the parking stand where the aircraft is parked based on the parking stand identifier carried in the service request instruction, and then determines the target subsystem corresponding to the parked parking stand from each subsystem based on the correspondence between the parking stand and the subsystem.

[0072] Step S20, based on the detection device in the target subsystem, the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating capacity corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft are measured.

[0073] Furthermore, the server sends a start instruction to the control device in the target subsystem, and the control device drives the display device in communication connection with the control device to start according to the start instruction, and then the ground staff can start the target subsystem to provide corresponding ground services to the aircraft through confirmation operation on the display device. That is, the hydraulic drive subsystem in the target subsystem controls the power subsystem, clean water subsystem, sewage subsystem and air conditioning subsystem in the target subsystem to start, and provide power, clean water, sewage treatment, air conditioning, etc. to the parked aircraft.

[0074] Furthermore, in the process of providing ground services, the detection device in the target subsystem detects the amount of electricity consumed by the target subsystem in providing power to the aircraft, the amount of cooling and heating generated by the air conditioner, the amount of clean water provided, and the amount of sewage treated on the aircraft. The cooling and heating amount includes the cooling amount generated by providing air conditioning refrigeration services and the heating amount generated by providing air conditioning heating services. The data obtained by the detection is then transmitted to the server, which analyzes and processes the data to obtain the amount of electricity corresponding to the power provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated, thereby achieving accurate measurement of electricity, cooling and heating, clean water, and sewage.

[0075] Furthermore, in order to meet different measurement requirements, in addition to measuring through the detection device of the subsystem, this embodiment also sets different measurement modes for selection. Specifically, the step of determining the target subsystem corresponding to the aircraft from the multiple subsystems includes:

[0076] Step S30, outputting the metering modes of the clean water volume, the sewage volume and the cooling and heating volume respectively, and accepting the selection instructions returned based on each of the metering modes respectively;

[0077] Step S40, if the metering mode corresponding to the clean water volume and the sewage volume in the selection instruction is metering by times, then the operation times of the clean water subsystem and the sewage subsystem corresponding to the aircraft are counted respectively, and the clean water volume and the sewage volume are measured respectively according to the operation times;

[0078] Step S50, if the metering mode corresponding to the cooling and heating amount in the selection instruction is time-based metering, counting the operating time of the air-conditioning subsystem, and metering the cooling and heating amount according to the operating time;

[0079] Step S60, if the metering mode corresponding to the selection instruction does not include metering by time and metering by time, then a step is executed to measure the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem.

[0080] Furthermore, after the service request instruction is detected and the target subsystem is determined, the corresponding metering modes are output to the display device for the electricity, clean water, sewage and cooling and heating amounts. The metering modes of clean water and sewage include a metering mode of metering by times and a metering mode detected by a detection device, the metering mode of cooling and heating amount includes a metering mode of metering by time and a metering mode detected by a detection device, and the metering mode of electricity is at least a metering mode detected by a detection device. The ground staff selects the metering mode output by the display device and sends a selection instruction to the server based on the selected metering modes. The information carried by the selection instruction includes several combinations, namely, a combination formed by metering of clean water by times and metering by the detection device, metering of sewage by times and metering by the detection device, metering of cooling and heating amount by time and metering by the detection device, and metering by the electricity detection device.

[0081] Furthermore, after receiving the selection instruction, the server identifies the information carried by the selection instruction. If the metering mode corresponding to the amount of clean water and / or sewage in the selection instruction is identified as per-time metering, it means that the amount of clean water and / or sewage treated by the target subsystem to the aircraft needs to be measured and the fees settled in the form of times. At this time, the number of operations corresponding to the clean water subsystem and the sewage subsystem and the aircraft currently parked at the parking position are counted, and the number of operations is the number of times the clean water subsystem provides clean water to the currently parked aircraft and is measured per time, and the number of times the sewage subsystem treats sewage for the currently parked aircraft and is measured per time. Furthermore, according to the number of operations of the clean water subsystem and the sewage subsystem, the amount of clean water provided and the amount of sewage treated are measured. The metering method can be to accumulate the statistical number of operations so that the fees can be settled later according to the overall accumulated number of times.

[0082] Furthermore, if the metering mode corresponding to the air conditioning cooling and heating amount in the identification selection instruction is time-based metering, it means that the cooling and heating amount generated by the air conditioning provided by the target subsystem to the aircraft needs to be measured and settled according to the length of time. At this time, the length of time that the air conditioning subsystem provides cooling and heating for the currently parked aircraft, that is, the operating time of the air conditioning subsystem, is counted, and the cooling and heating amount is measured based on the counted operating time.

[0083] Furthermore, if the metering mode corresponding to the identification selection instruction does not include metering by time or metering by time, it means that the amount of clean water provided by the target subsystem, the amount of sewage treated, the amount of cooling and heating provided by the air conditioner, and the amount of electricity provided by the power supply all need to be measured through the detection data of the detection device. At this time, the server accurately measures the amount of electricity, clean water and cooling and heating provided by the target subsystem to the aircraft, as well as the amount of sewage treated in the aircraft based on the data detected by the detection device in the target subsystem.

[0084] It should be noted that the on-time measurement of the cooling and heating amount can be measured by estimating the cooling and heating amount generated by the previous aircraft parking periods. Specifically, the steps of counting the operating time of the air conditioning subsystem and measuring the cooling and heating amount according to the operating time include:

[0085] Step S51, identifying the start time and stop time of the air conditioning subsystem, and determining the operation time of the air conditioning subsystem according to the start time and stop time;

[0086] Step S52, obtaining a reference input flow, a reference input temperature, a reference input humidity, and current weather data corresponding to the aircraft, and searching for a unit cooling and heating capacity corresponding to the reference input flow, the reference input temperature, the reference input humidity, and the current weather data;

[0087] Step S53, predicting the cooling and heating capacity according to the operation time and the unit cooling and heating capacity to obtain a prediction result;

[0088] Step S54, obtaining the length, first cross-sectional area, and temperature difference between both ends of the air-conditioning duct in the air-conditioning subsystem connected to the aircraft, as well as the air density and air specific heat capacity corresponding to the geographical location of the aircraft, and calculating the loss value of the duct according to the length, first cross-sectional area, temperature difference between both ends, air density, and air specific heat capacity;

[0089] Step S55, correcting the prediction result according to the loss value to obtain the cooling and heating amount.

[0090] Furthermore, the start time and stop time of the air conditioning subsystem are identified, and the operation time of the air conditioning subsystem is determined based on the identified start and end time. In addition, different aircraft models contain different precision instruments, and the requirements for the flow rate of the incoming air, the temperature and humidity of the air are different. Therefore, in order to accurately determine the cooling and heating capacity provided during the operation time, the reference input flow rate, reference input temperature and reference input humidity corresponding to the aircraft are obtained. The reference input flow rate, reference input temperature and reference input humidity are the input flow rate, temperature and humidity required by the currently parked aircraft. At the same time, weather data such as the temperature and humidity of the outdoor weather also have an impact on the cooling and heating capacity of the air conditioner, so the weather data of the current environment of the parked aircraft is also obtained. Then, the unit cooling and heating capacity corresponding to the reference input flow rate, reference input temperature, reference input humidity, and current weather data is found. The unit cooling and heating capacity is the cooling and heating capacity provided for the aircraft that has been parked in the past under the same or basically similar weather conditions in the unit time, and the previously parked aircraft has the same or basically similar reference input flow rate, reference input temperature and reference input humidity as the currently parked aircraft. Thereafter, the cooling and heating capacity is predicted by multiplying the operating time and the unit cooling and heating capacity, and the result of the multiplication operation is the prediction result.

[0091] Understandably, the air conditioning subsystem is connected to the aircraft's air conditioning interface through its air conditioning ducts to provide air conditioning services to the aircraft. The presence of air conditioning ducts will affect the temperature of the air that is ultimately input to the aircraft. For example, when the weather data is a, the required input flow, input temperature, and input humidity are b1, b2, and b3, respectively, the unit cooling and heating capacity is w. If the air conditioning subsystem directly provides air conditioning to the aircraft according to w, the presence of air conditioning ducts will consume part of the cooling and heating capacity, making the temperature of the air that ultimately enters the aircraft lower (when heating) or higher (when cooling) than the input temperature. Therefore, in order to ensure the accuracy of the predicted cooling and heating capacity, the air conditioning duct factor needs to be considered to correct the prediction results.

[0092] Specifically, the length, first cross-sectional area and temperature difference between the two ends of the pipe used for connecting to the aircraft in the air conditioning subsystem are obtained. The temperature difference between the two ends is the temperature difference between the end of the pipe connected to the aircraft and the end connected to the outlet of the air conditioning compressor in the air conditioning subsystem, which can be detected and obtained by setting a thermometer in the detection device. At the same time, considering that the aircraft is located in different geographical locations, different locations have different atmospheric pressures, and the atmospheric pressure will affect the density of the air. Therefore, the air density and air specific heat capacity corresponding to the geographical location of the aircraft are also obtained, and then based on the length, first cross-sectional area, temperature difference between the two ends, air density and air specific heat capacity of the obtained pipe, the loss value of the temperature loss caused by the existence of the pipe is calculated, and the calculation formula can be specifically referred to as the following formula (1).

[0093] δ= (ρ*σ* (A1*L)*(Δt)) (1);

[0094] Among them, δ represents the loss value, ρ represents the air density, σ represents the specific heat capacity of air, A1 represents the first cross-sectional area, L represents the length of the pipeline, and Δt represents the temperature difference between the two ends.

[0095] After calculating the loss value of the temperature loss caused by the existence of the pipeline, the prediction result can be corrected according to the loss value to obtain the cooling and heating capacity. Among them, the correction method is preferably to add the loss value and the prediction result, and the result obtained is the corrected cooling and heating capacity. By correcting the cooling and heating capacity by considering the temperature loss caused by the pipeline, the determined cooling and heating capacity is more accurate.

[0096] The metering method for the ground service system implemented in this embodiment is that the ground service system is set in the underground corridor of the airport apron, and includes multiple subsystems, each of which corresponds to a parking space in the airport apron, and is used to provide power, clean water, air conditioning, and sewage treatment for the aircraft parked at the parking space. When a service request instruction triggered by an aircraft parked at a parking space in the airport apron is detected, indicating that the aircraft has stopped at a certain parking space in the airport apron and needs ground service, the subsystem corresponding to the parking space is searched from multiple subsystems as the target subsystem for providing ground service to the aircraft. In addition, each subsystem is provided with a detection device, so the target subsystem can be used to quantitatively measure the power consumption of the power supply provided by the target subsystem to the aircraft, the cooling and heating capacity of the air conditioner, the amount of clean water, and the amount of sewage treated, and then the service billing is performed based on the specific data of the measurement, so as to realize the accurate billing of the power supply, air conditioning, clean water and sewage treatment provided in the ground service.

[0097] For further information, please refer to Figure 2 Based on the first embodiment of the metering method for a ground service system of the present invention, a second embodiment of the metering method for a ground service system of the present invention is proposed.

[0098] The second embodiment of the metering method for a ground service system is different from the first embodiment of the metering method for a ground service system in that the step of measuring the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem includes:

[0099] Step S21, obtaining a transformation ratio corresponding to a current transformer in the current detection device and a reading of an electric meter in the current detection device, and calculating the amount of electricity provided by the power subsystem to the aircraft according to the transformation ratio and the reading;

[0100] Furthermore, the power subsystem, clean water subsystem, sewage subsystem and air conditioning subsystem in the target subsystem are all located in the underground corridor of the airport apron, while the aircraft is parked on the ground of the airport apron. Therefore, in order to provide power, clean water, sewage treatment, air conditioning, etc. to the parked aircraft through the power subsystem, clean water subsystem, sewage subsystem and air conditioning subsystem, it is necessary to open a channel connecting the underground and the ground. Specifically, the first channel, the second channel, the third channel and the fourth channel corresponding to the power subsystem, the clean water subsystem, the sewage subsystem and the air conditioning subsystem can be opened in the underground corridor to connect to the ground, and the box covers of the respective elevators of the power subsystem, the clean water subsystem, the sewage subsystem and the air conditioning subsystem in the non-working state are flush with the upper surfaces of the first channel, the second channel, the third channel and the fourth channel respectively. When working, the power subsystem, the clean water subsystem, the sewage subsystem and the air conditioning subsystem are lifted out from the first channel, the second channel, the third channel and the fourth channel by each elevator. In addition, corresponding to the power subsystem, clean water subsystem, sewage subsystem and air-conditioning subsystem, respective start buttons are provided, and respective start instructions are triggered by respective start buttons to provide power, air conditioning, clean water and sewage treatment for the parked aircraft.

[0101] Furthermore, the detection device of each subsystem includes an electric quantity detection device for detecting electric energy, and the electric quantity detection device includes a three-phase electric meter installed on the inverter panel of the power subsystem, and a current transformer installed on the three-phase cable. The current transformer can convert a primary current with a larger value into a secondary current with a smaller value through a certain transformation ratio, and measure it for the electric meter to protect the electric meter. In this embodiment, the server obtains the transformation ratio of the current transformer, the starting reading of the electric meter when the power subsystem starts to provide power to the currently parked aircraft, and the ending reading of the electric meter when the power subsystem stops providing power to the currently parked aircraft, and determines the reading of the electric meter based on the ending reading and the starting reading. Then, a related product operation is performed between the transformation ratio and the reading to realize the calculation of the electric quantity provided by the power subsystem to the aircraft, and obtain the provided electric quantity value.

[0102] In addition, the current transformer is composed of an iron core and a winding. The iron core magnetization loss may cause an error in the current transformer. Therefore, in order to ensure the accuracy of the calculated electric quantity, a correction mechanism based on an error factor is provided for the calculated electric quantity. Specifically, the step of calculating the electric quantity provided by the power subsystem to the aircraft includes:

[0103] Step S211, obtaining mutual inductance parameters of the current transformer, wherein the mutual inductance parameters include winding impedance of the secondary winding, load impedance, average length of the iron core magnetic circuit, second cross-sectional area of ​​the iron core, number of turns of the secondary winding, electromotive force on the secondary side, input current frequency, hysteresis angle of the iron core, and impedance angle of the secondary winding;

[0104] Step S212, searching for a core loss coefficient corresponding to the current transformer, and determining a magnetic density corresponding to the current transformer according to the core loss coefficient, the electromotive force, the input current frequency, the number of turns, and the second cross-sectional area, and determining a magnetic permeability corresponding to the current transformer according to the magnetic density and the magnetic field strength corresponding to the current transformer;

[0105] Step S213, calculating an error parameter of the current transformer according to the winding impedance, load impedance, average length, input current frequency, number of turns, magnetic permeability and second cross-sectional area;

[0106] Step S214, determining the ratio difference and the angle difference of the current transformer according to the error parameter, the hysteresis angle and the impedance angle, and correcting the electrical quantity according to the ratio difference and the angle difference.

[0107] Furthermore, the mutual inductance parameters of the current transformer itself are obtained, and such mutual inductance parameters at least include the impedance of the secondary winding, the load impedance, the average length of the iron core magnetic circuit, the second cross-sectional area of ​​the iron core, the number of turns of the secondary winding, the input current frequency, the hysteresis angle of the iron core, the impedance angle of the secondary winding, and the electromotive force of the secondary side. Such parameters can be obtained by pre-testing and stored, and the server obtains them by accessing the storage.

[0108] Furthermore, the core magnetization loss will affect the magnetic density, and then affect the magnetic permeability, ratio difference and angular difference. Specifically, the core magnetization loss in the current transformer can be determined according to the use time and use scenario of the current transformer, and the core loss coefficient corresponding to the core magnetization loss can be found. Then, according to the electromotive force, input current frequency, number of turns, cross-sectional area and core loss coefficient, the magnetic density corresponding to the core magnetization loss of the current transformer is determined, which can be calculated by the calculation formula B=E / (k1*f*N2*A2), where B is the magnetic density, E is the electromotive force, k1 is the core loss coefficient, f is the input current frequency, N2 is the number of turns, and A2 is the second cross-sectional area. Then, the magnetic permeability corresponding to the current transformer is determined by the magnetic density and magnetic field strength. Specifically, it can be calculated by the calculation formula u=B / H, where u is the magnetic permeability and H is the magnetic field strength.

[0109] Furthermore, the error parameters of the current transformer are calculated by combining the magnetic permeability, the winding impedance, the load impedance, the average length, the input current frequency, the number of turns, and the second cross-sectional area in the mutual inductance parameters. The specific calculation formula can be referred to as the following formula (2).

[0110]

[0111] Among them, γ represents the error parameter, Z1 represents the winding impedance, Z2 represents the load impedance, L represents the average length, f represents the input current frequency, N2 represents the number of turns, u represents the magnetic permeability, and A2 represents the second cross-sectional area.

[0112] Furthermore, after the error parameter is obtained by calculation, the error parameter can be combined with the hysteresis angle and the impedance angle to generate the ratio difference and angle difference of the current transformer. The ratio difference is the amplitude difference between the actual output current and the rated output current. The ratio difference coefficient is set in advance according to the ratio difference influencing factor. The sine value of the sum of the hysteresis angle and the impedance angle is first generated, and then the ratio difference is generated by multiplying the error parameter, the sine value, and the ratio difference coefficient. The angle difference is the phase difference between the actual output current and the rated output current. The angle difference coefficient is also set in advance according to the angle difference influencing factor. The cosine value of the sum of the hysteresis angle and the impedance angle is first generated, and then the error parameter, the cosine value, and the ratio difference coefficient are multiplied to generate the angle difference.

[0113] Furthermore, after the ratio difference and the angle difference are obtained by calculation, the two can be added together to obtain the calculation result to correct the electric quantity. The correction method can be to find the correction current value corresponding to the calculation result, and then generate the correction current value as the correction electric quantity, and add the correction electric quantity to the electric quantity to realize the correction of the electric quantity and obtain the accurate electric quantity provided by the power subsystem to the aircraft.

[0114] Step S22, obtaining a clean water measurement value detected by the clean water flow meter and a clean water reference error interval corresponding to the clean water measurement value, and correcting the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft;

[0115] Step S23, obtaining a sewage measurement value detected by the sewage flow meter and a sewage reference error interval corresponding to the sewage measurement value, and correcting the sewage measurement value based on the sewage reference error interval to obtain a sewage volume treated by the sewage subsystem on the aircraft;

[0116] Furthermore, the detection device of each subsystem also includes a clean water flow meter for detecting the amount of clean water and a sewage flow meter for detecting the amount of sewage. Moreover, the clean water flow meter and the sewage flow meter may both use ultrasonic flow meters, or electromagnetic flow meters, or one may use ultrasonic flow meters and the other may use electromagnetic flow meters, without limitation. For the ultrasonic flow meter, it includes an ultrasonic transmitter and an ultrasonic receiver, and calculates the flow velocity and flow rate of the fluid by using the relationship between the speed of ultrasonic wave propagation in the fluid and the flow direction of the fluid. For the electromagnetic flow meter, the flow measurement is performed based on Faraday's law of electromagnetic induction.

[0117] Furthermore, regardless of the type of flow meter, the measurement results may have errors. In order to avoid errors affecting the accuracy of the measurement results, corresponding reference error intervals are set in advance for different clean water measurement values. When determining the amount of clean water provided, after the server obtains the clean water measurement value by receiving the measurement data transmitted by the clean water flow meter, it obtains the clean water error reference interval corresponding to the clean water measurement value from the pre-stored clean water reference error intervals, and corrects the clean water measurement value according to the clean water reference error interval to obtain the clean water amount provided by the clean water subsystem to the aircraft. By correcting the clean water reference error interval, the accurate clean water amount provided is obtained.

[0118] When determining the amount of sewage provided, after obtaining the sewage measurement value by receiving the measurement data transmitted by the sewage flow meter, the server obtains the sewage reference error interval corresponding to the sewage measurement value from the pre-stored sewage reference error intervals, and corrects the sewage measurement value according to the sewage reference error interval to obtain the amount of sewage processed by the sewage subsystem for the aircraft. By correcting the sewage reference error interval, the accurate amount of sewage processed is obtained.

[0119] The correction of the sewage measurement value by the sewage reference error interval and the correction of the clean water measurement value by the clean water reference error interval can be performed in the same correction manner. Here, the correction manner of the clean water quantity is described, and the sewage quantity is not described in detail. Specifically, the step of correcting the clean water measurement value based on the clean water reference error interval to obtain the clean water quantity provided by the clean water subsystem to the aircraft includes:

[0120] Step S221, generating the clean water reference error interval as an average error flow, and obtaining the clean water reference temperature and reference pressure corresponding to the clean water reference flow interval, and the clean water current temperature and current pressure corresponding to the clean water flow meter;

[0121] Step S222, calculating a correction flow corresponding to the average error flow based on the average error flow, the clean water reference temperature, the reference pressure, and the current temperature and current pressure of the clean water;

[0122] Step S223, correcting the clean water measurement value according to the corrected flow rate to obtain the clean water volume.

[0123] Furthermore, both the clean water reference error interval and the sewage reference error interval are generated by pre-testing a standard flow meter with the same model parameters as the flow meter. For example, for each clean water reference error interval, the standard clean water flow meter and the clean water flow meter are used to test the same fluid with a certain flow rate to obtain standard measurement values ​​and test measurement values, respectively; and the flow rate of the fluid is changed multiple times to obtain multiple sets of standard measurement values ​​and test measurement values. Then, multiple sets of standard measurement values ​​and test measurement values ​​are followed up to generate the clean water reference error interval corresponding to each test measurement value. For example, five sets of standard measurement values ​​and test measurement values ​​are obtained, namely [a1, b1], [a3, b1], [a2, b2], [a4, b1], [a1, b2]. If the values ​​of a1, a2, a3, and a4 gradually increase, the clean water reference error interval corresponding to the test measurement value b1 is [a1-a4], and the clean water reference error interval corresponding to the test measurement value b2 is [a1-a2].

[0124] It is understandable that the standard clean water flow meter and the clean water flow meter measure the fluid flow rate under a certain temperature and pressure, which may be different from the current temperature and pressure of the clean water subsystem providing clean water to the aircraft, resulting in errors in the corresponding clean water reference error interval. In this regard, further corrections can be made based on the current temperature and pressure to further improve the accuracy of the clean water volume.

[0125] Specifically, the upper interval value and the lower interval value of the clean water reference error interval are averaged to generate an average error flow rate. At the same time, the clean water reference temperature and reference pressure corresponding to the clean water reference flow interval are obtained, as well as the current temperature and current pressure of the clean water provided by the clean water subsystem to the aircraft. Among them, the clean water reference temperature and reference pressure are the temperature of the clean water measured by the standard clean water flowmeter when the standard clean water flowmeter measures to form the clean water reference flow interval, and the fluid pressure at the clean water corresponding to the standard clean water flowmeter. The current temperature and current pressure of the clean water correspond to the temperature of the clean water currently measured by the clean water flowmeter, and the fluid pressure at the clean water corresponding to the clean water flowmeter.

[0126] Furthermore, based on the average error flow rate, the clean water reference temperature, the reference pressure, and the current clean water temperature and current pressure, the corrected flow rate corresponding to the average error flow rate is calculated. The calculation formula can be seen in the following formula (3).

[0127] V=Vs*[1-(C1-C2)]*[1+(D1-D2)] (3);

[0128] Wherein, V represents the corrected flow rate, Vs represents the average error flow rate, C1 represents the reference temperature of clean water, C2 represents the current temperature of clean water, D1 represents the reference pressure, and D2 represents the current pressure.

[0129] Furthermore, after the corrected flow is obtained by calculation, the clean water measurement value can be corrected according to the corrected flow. The correction method can be to generate the corrected flow and the clean water measurement value as a flow difference, and compare the flow difference with a preset threshold value set in advance to determine whether the flow difference is less than the preset threshold. If it is less than the preset threshold, it means that the clean water measurement value detected by the clean water flow meter has an error caused by the measurement environment, so the corrected flow is used to replace the clean water measurement value to achieve the correction of the clean water measurement value and obtain the clean water volume provided by the clean water subsystem to the aircraft. On the contrary, if it is determined through comparison that the flow difference is less than or equal to the preset threshold, it means that the difference between the corrected flow and the clean water flow value is large, and there may be a problem with the clean water measurement value detected by the clean water flow meter. At this time, the clean water measurement value detected by the standby flow meter corresponding to the clean water flow meter in the clean water subsystem can be read to obtain the clean water volume provided by the clean water subsystem to the aircraft.

[0130] Step S24, obtaining the wind speed value, temperature value, humidity value and pressure value detected by the anemometer, thermometer, hygrometer and pressure gauge in the air conditioning detection device, and determining the cooling and heating amount provided by the air conditioning subsystem to the aircraft based on the wind speed value, temperature value, humidity value and pressure value.

[0131] Furthermore, the detection device of each subsystem also includes an air conditioning detection device for detecting the cooling and heating capacity of the air conditioner. The air conditioning detection device may specifically include an anemometer, a thermometer, a hygrometer, a pressure gauge, etc. The background receives the measurement data transmitted by the anemometer, the thermometer, the anemometer and the pressure gauge to obtain the wind speed value, temperature value, humidity value and pressure gauge detected by each, and then calculates the cooling and heating capacity provided by the air conditioning subsystem to the aircraft by analyzing and processing the wind speed value, temperature value, humidity value and pressure value.

[0132] In this embodiment, the target subsystem provides the aircraft with power, clean water, air conditioning, and sewage. The amount of cooling and heating, as well as the amount of treated sewage, are quantitatively measured by corresponding detection devices in the target subsystem, and the measurement results are corrected in combination with factors that affect the measurement accuracy, so that the obtained power, clean water, cooling and heating, and sewage amounts are more accurate, which is conducive to the accurate billing of aircraft ground services.

[0133] For further information, please refer to Figure 3 Based on the second embodiment of the metering method for a ground service system of the present invention, a third embodiment of the metering method for a ground service system of the present invention is proposed.

[0134] The third embodiment of the metering method for a ground service system is different from the second embodiment of the metering method for a ground service system in that the air conditioning subsystem includes an air inlet and an air outlet, the temperature value includes an air inlet dry bulb temperature corresponding to the air inlet and an air outlet dry bulb temperature corresponding to the air outlet, the humidity value includes an air inlet air humidity content and an air outlet air humidity content, and the pressure value includes a first end pressure value and a second end pressure value of an air conditioning duct in the air conditioning subsystem that is docked with the aircraft;

[0135] The step of determining the cooling and heating amount provided by the air conditioning subsystem to the aircraft according to the wind speed value, the temperature value, the humidity value and the pressure value comprises:

[0136] Step S241, obtaining the geographical location information of the aircraft, and the local atmospheric pressure and air density corresponding to the geographical location information, and generating the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure;

[0137] Furthermore, the air conditioning subsystem includes an air inlet for introducing outdoor air, and an air outlet for blowing out the refrigerated or heated air. In addition, the air outlet is connected to an air conditioning duct, and the other end of the air conditioning duct is connected to the air conditioning interface of the aircraft to introduce the refrigerated or heated air into the aircraft. Corresponding to the air inlet and each air outlet, the thermometer in the air conditioning detection device includes an air inlet thermometer for detecting the inlet dry bulb temperature, and an air outlet thermometer for detecting the outlet dry bulb temperature, so that the detected temperature value includes the inlet dry bulb temperature corresponding to the air inlet, and the outlet dry bulb temperature corresponding to the air outlet. Similarly, the hygrometer in the air conditioning detection device includes an air inlet hygrometer for detecting the air humidity content of the air inlet, and an air outlet hygrometer for detecting the air humidity content of the air outlet, so that the detected humidity value includes the air humidity content of the air inlet and the air humidity content of the air outlet. Corresponding to the two ends of the air conditioning duct, the pressure gauge in the air conditioning detection device includes a first end pressure gauge and a second end pressure gauge for respectively detecting the pressures at the two ends, so that the pressure values ​​detected correspondingly include the first end pressure value and the second end pressure value.

[0138] Furthermore, an anemometer is arranged at the air outlet to detect the wind speed value of the air outlet, and the detected wind speed value is combined with the factors affecting the accuracy of wind speed value detection to generate the air flow rate of the air outlet. Among them, the size of the wind speed value is related to the size of the pressure difference formed at both ends of the air conditioning duct. The greater the pressure difference, the greater the wind speed value, and vice versa. The first end pressure and the second end pressure that form the pressure difference at both ends of the air conditioning duct constitute the factors affecting the accuracy of wind speed value detection. At the same time, the atmospheric pressure corresponding to different altitudes is different. The higher the altitude, the lower the atmospheric pressure. For example, in Xining, my country, the altitude is about 2261m, and the corresponding atmospheric pressure is about 77KPa. The altitude of Guangzhou is about 6m, and the corresponding atmospheric pressure is about 100KPa. The altitude of Kunming is about 1891 meters, and the corresponding atmospheric pressure is about 81KPa. The atmospheric pressure corresponding to the area where this type of aircraft is parked will also affect the accuracy of wind speed value detection. Therefore, the geographical location information of the aircraft is obtained, and the local atmospheric pressure and air density corresponding to the geographical location information are obtained. Furthermore, the wind speed value is combined with the first end pressure value, the second end pressure value and the local atmospheric pressure to generate the air flow rate at the air outlet of the air conditioning subsystem. Specifically, the step of generating the air flow rate at the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure includes:

[0139] Step a1, generating the first end pressure value and the second end pressure value as the relative pressure difference of the air conditioning pipeline, and searching for a reference pressure difference coefficient corresponding to the relative pressure difference;

[0140] Step a2, finding a reference temperature coefficient corresponding to the dry-bulb temperature of the air outlet and a reference factor coefficient corresponding to the anemometer;

[0141] Step a3, calculating the air flow rate at the air outlet of the air conditioning subsystem according to the first cross-sectional area of ​​the air conditioning duct, the wind speed value, the local atmospheric pressure, the reference pressure difference coefficient, the reference temperature coefficient, and the reference factor coefficient.

[0142] Furthermore, different reference pressure difference coefficients are set in advance for the pressure difference at both ends of the air conditioning duct. The reference pressure difference coefficients represent the influence of different pressure differences on the accuracy of the wind speed value detected by the anemometer, which can be obtained through preliminary tests. A difference operation is performed between the pressure value at the first end and the pressure value at the second end to generate the relative pressure difference of the air conditioning duct. Then, from the corresponding relationship between the preset pressure difference and the reference pressure difference coefficient, the reference pressure difference coefficient corresponding to the relative pressure difference is searched.

[0143] It is understandable that the air temperature also affects the measurement of wind speed. Generally, the higher the air temperature, the more active the air molecules are, and the flow rate increases accordingly. Similarly, the temperature reference coefficient corresponding to the air at various temperatures can be obtained in advance through experiments, so as to express the influence of different temperatures on the accuracy of the wind speed value detected by the anemometer through the temperature reference coefficient. One end of the air conditioning duct is connected to the air outlet, so the reference temperature coefficient corresponding to the dry bulb temperature of the air outlet is found from the correspondence between the preset temperature and the reference temperature coefficient.

[0144] Furthermore, in the process of detecting wind speed, the anemometer has some factors that affect the detection accuracy, such as the cleanliness of the anemometer surface, the accuracy of the anemometer, the anemometer being affected by the vibration of the air conditioning subsystem, etc. Such factors are regarded as the anemometer's own factors, and the reference factor coefficients of the influence of each factor on the detection accuracy are determined in advance through experiments. When it is necessary to generate air flow, the reference factor coefficients are searched, and the air flow at the air outlet of the air conditioning subsystem is calculated in combination with the first cross-sectional area of ​​the air conditioning duct, the wind speed value, the current atmospheric pressure, the reference pressure difference coefficient, and the reference temperature coefficient. The specific calculation formula can be found in the following formula (4).

[0145]

[0146] Among them, q is the air flow rate, C is the wind speed value, A1 is the first cross-sectional area, P1 is the reference pressure difference coefficient, P3 is the standard atmospheric pressure, P2 is the local atmospheric pressure, w is the reference temperature coefficient, n is the number of anemometer's own factors, and ki is the reference factor coefficient corresponding to the i-th own factor.

[0147] It should be noted that the number of factors that affect the accuracy of anemometer measurement, that is, the factor data itself, can be set in a variety of ways depending on the type of anemometer. For example, for a hot wire anemometer, the effect of thermistor on measurement can be considered, and for an ultrasonic anemometer, the effect of propagation time on measurement can be considered. By comprehensively considering the impact on measurement accuracy, the generated air flow is more accurate.

[0148] Step S242, generating an inlet air enthalpy value of the inlet according to the inlet dry-bulb temperature and the inlet air humidity, and generating an outlet air enthalpy value of the outlet according to the outlet dry-bulb temperature and the outlet air humidity;

[0149] Step S243, determining the cooling and heating amount according to the air flow, the inlet air enthalpy value, the outlet air enthalpy value, the air density and the moisture content of the air at the air outlet.

[0150] Furthermore, the inlet dry bulb temperature is combined with the inlet air humidity to generate the inlet air enthalpy value, and the outlet dry bulb temperature is combined with the outlet air humidity to generate the outlet air enthalpy value. The specific generation methods can be referred to the following formula (5) and formula (6) respectively.

[0151] h1=a*t1+w1(b+c*t1) (5);

[0152] h2=a*t2+w2(b+c*t2) (6);

[0153] Among them, h1 is the enthalpy of the inlet air, t1 is the dry bulb temperature of the inlet, w1 is the humidity of the inlet air, h2 is the enthalpy of the outlet air, t2 is the dry bulb temperature of the outlet, w2 is the humidity of the outlet air, a is the average constant-pressure specific heat of dry air, b is the latent heat of vaporization of water at 0°C, and c is the average constant-pressure specific heat of water vapor. The values ​​of a, b, and c can be obtained by looking up the table.

[0154] Furthermore, the atmospheric pressure differences caused by the altitudes of different regions will also affect the air density. The lower the atmospheric pressure, the lower the air density, and the air density will affect the air conditioning heating capacity. Therefore, based on the air density, the air flow, the inlet air enthalpy, the outlet air enthalpy, and the air humidity at the outlet, the air conditioning heating capacity provided by the air conditioning subsystem to the aircraft is calculated. The calculation formula can be found in the following formula (7).

[0155]

[0156] Where S represents the cooling heating capacity, q represents the air flow rate, h1 represents the inlet air enthalpy, h2 represents the outlet air enthalpy, ρ represents the air density, and w represents the air humidity at the outlet.

[0157] This embodiment focuses on the cooling and heating capacity of the air-conditioning provided by the air-conditioning subsystem to the aircraft. On the one hand, it takes into account the difference in air density due to the difference in altitude where the aircraft is located, and on the other hand, it fully considers various factors that affect the air flow to ensure the accuracy of the generated air flow, thereby improving the accuracy of the cooling and heating capacity metering.

[0158] In addition, an embodiment of the present invention further provides a metering system for a ground service system. The metering system includes a server and a communication bus, and the server is connected to the ground service system through the communication bus. In addition, the metering system also includes a monitoring device, and the monitoring device and the server can also be connected to each other through the communication bus to monitor the status of each subsystem in the ground service system.

[0159] Please refer to Figure 4 , Figure 4It is a structural schematic diagram of the server hardware operating environment involved in the embodiment scheme of the metering system for the ground service system of the present invention.

[0160] like Figure 4 As shown, the server may include: a processor 1001, such as a CPU, a user interface 1003, a network interface 1004, and a storage 1005. Among them, the communication bus 1002 is used not only for the communication connection between the server and the ground service system, but also for realizing the connection and communication between these components. The user interface 1003 may optionally include a standard wired interface, a wireless interface, etc. The network interface 1004 may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface). The storage 1005 may be a high-speed RAM storage, or a stable storage (non-volatile memory), such as a disk storage. The storage 1005 may also be a storage device independent of the aforementioned processor 1001.

[0161] Those skilled in the art will understand that Figure 4 The hardware structure of the server shown in the figure does not constitute a limitation on the metering system for the ground service system. The metering system for the ground service system may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0162] like Figure 4 As shown, the storage 1005 as a storage medium may include an operating system, a network communication module, a user interface module and a metering program. The operating system is a program for managing and controlling the metering system and software resources for the ground service system, and supports the operation of the network communication module, the user interface module, the metering program and other programs or software; the network communication module is used to manage and control the network interface 1004; the user interface module is used to manage and control the user interface 1003.

[0163] exist Figure 4 In the server hardware structure shown, the network interface 1004 is mainly used to connect to the network to achieve data communication; the user interface 1003 is mainly used to connect to the client (user end) and perform data communication with the client; the processor 1001 can call the metering program stored in the storage 1005 and perform the following operations:

[0164] When a service request instruction triggered by an aircraft parked at a parking space on an airport apron is detected, a target subsystem corresponding to the aircraft is determined from the plurality of subsystems;

[0165] Based on the detection device in the target subsystem, the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft are measured.

[0166] Furthermore, the step of measuring the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem includes:

[0167] Obtaining a transformation ratio corresponding to a current transformer in the current detection device and a reading of an electric meter in the current detection device, and calculating the amount of electricity provided by the power subsystem to the aircraft based on the transformation ratio and the reading;

[0168] Acquire a clean water measurement value detected by the clean water flow meter and a clean water reference error interval corresponding to the clean water measurement value, and correct the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft;

[0169] Acquire a sewage measurement value detected by the sewage flow meter and a sewage reference error interval corresponding to the sewage measurement value, and correct the sewage measurement value based on the sewage reference error interval to obtain a sewage volume treated by the sewage subsystem on the aircraft;

[0170] The wind speed value, temperature value, humidity value and pressure value detected by the anemometer, thermometer, hygrometer and pressure gauge in the air conditioning detection device are obtained, and the cooling and heating amount provided by the air conditioning subsystem to the aircraft is determined according to the wind speed value, temperature value, humidity value and pressure value.

[0171] Furthermore, the step of determining the amount of cooling and heating provided by the air conditioning subsystem to the aircraft according to the wind speed value, temperature value, humidity value and pressure value comprises:

[0172] Acquire the geographical location information of the aircraft, and the local atmospheric pressure and air density corresponding to the geographical location information, and generate the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure;

[0173] Generating an enthalpy value of the inlet air according to the inlet dry-bulb temperature and the inlet air humidity, and generating an enthalpy value of the outlet air according to the outlet dry-bulb temperature and the outlet air humidity;

[0174] The cooling and heating amount is determined according to the air flow, the inlet air enthalpy value, the outlet air enthalpy value, the air density and the moisture content of the air at the air outlet.

[0175] Further, the step of generating the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure includes:

[0176] Generate the first end pressure value and the second end pressure value as the relative pressure difference of the air conditioning pipeline, and find a reference pressure difference coefficient corresponding to the relative pressure difference;

[0177] Finding a reference temperature coefficient corresponding to the dry-bulb temperature of the air outlet and a reference factor coefficient corresponding to the anemometer;

[0178] The air flow rate at the air outlet of the air conditioning subsystem is calculated according to the first cross-sectional area of ​​the air conditioning duct, the wind speed value, the local atmospheric pressure, the reference pressure difference coefficient, the reference temperature coefficient, and the reference factor coefficient. The calculation formula is:

[0179]

[0180] Among them, q is the air flow rate, C is the wind speed value, A1 is the first cross-sectional area, P1 is the reference pressure difference coefficient, P3 is the standard atmospheric pressure, P2 is the local atmospheric pressure, w is the reference temperature coefficient, n is the number of anemometer's own factors, and ki is the reference factor coefficient corresponding to the i-th own factor.

[0181] Furthermore, after the step of calculating the amount of electricity provided by the power subsystem to the aircraft, the processor 1001 may call a metering program stored in the storage 1005 and perform the following operations:

[0182] Obtaining mutual inductance parameters of the current transformer, the mutual inductance parameters including winding impedance of the secondary winding, load impedance, average length of the iron core magnetic circuit, second cross-sectional area of ​​the iron core, number of turns of the secondary winding, electromotive force on the secondary side, input current frequency, hysteresis angle of the iron core, and impedance angle of the secondary winding;

[0183] Finding a core loss coefficient corresponding to the current transformer, and determining a magnetic density corresponding to the current transformer according to the core loss coefficient, the electromotive force, the input current frequency, the number of turns and the second cross-sectional area, and determining a magnetic permeability corresponding to the current transformer according to the magnetic density and the magnetic field strength corresponding to the current transformer;

[0184] According to the winding impedance, load impedance, average length, input current frequency, number of turns, magnetic permeability and second cross-sectional area, the error parameter of the current transformer is calculated, and the calculation formula is:

[0185]

[0186] Wherein, γ represents the error parameter, Z1 represents the winding impedance, Z2 represents the load impedance, L represents the average length, f represents the input current frequency, N2 represents the number of turns, u represents the magnetic permeability, and A2 represents the second cross-sectional area;

[0187] The ratio difference and the angle difference of the current transformer are determined according to the error parameter, the hysteresis angle and the impedance angle, and the electrical quantity is corrected according to the ratio difference and the angle difference.

[0188] Furthermore, the step of correcting the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft includes:

[0189] Generate the clean water reference error interval as an average error flow rate, and obtain the clean water reference temperature and reference pressure corresponding to the clean water reference flow rate interval, and the clean water current temperature and current pressure corresponding to the clean water flow meter;

[0190] Based on the average error flow rate, the clean water reference temperature, the reference pressure, and the current clean water temperature and the current pressure, a correction flow rate corresponding to the average error flow rate is calculated, and the calculation formula is:

[0191] V=Vs*[1-(C1-C2)]*[1+(D1-D2)];

[0192] Wherein, V represents the corrected flow rate, Vs represents the average error flow rate, C1 represents the reference temperature of clean water, C2 represents the current temperature of clean water, D1 represents the reference pressure, and D2 represents the current pressure;

[0193] The clean water measurement value is corrected according to the corrected flow rate to obtain the clean water volume.

[0194] Further, after the step of determining the target subsystem corresponding to the aircraft from the plurality of subsystems, the processor 1001 may call the measurement program stored in the storage 1005 and perform the following operations:

[0195] Outputting the metering modes of the clean water volume, the sewage volume and the cooling and heating volume respectively, and accepting the selection instructions returned based on each of the metering modes respectively;

[0196] If the metering mode corresponding to the clean water volume and the sewage volume in the selection instruction is metering by times, the operation times of the clean water subsystem and the sewage subsystem corresponding to the aircraft are counted respectively, and the clean water volume and the sewage volume are measured respectively according to each of the operation times;

[0197] If the metering mode corresponding to the cooling and heating amount in the selection instruction is time-based metering, the operation time of the air-conditioning subsystem is counted, and the cooling and heating amount is measured according to the operation time;

[0198] If the metering mode corresponding to the selection instruction does not include metering by time and metering by time, the steps of measuring the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of fresh water, and the amount of sewage treated in the aircraft are performed based on the detection device in the target subsystem.

[0199] Furthermore, the step of counting the operating time of the air-conditioning subsystem and measuring the cooling and heating amount according to the operating time includes:

[0200] Identifying the start time and stop time of the air conditioning subsystem, and determining the operation time of the air conditioning subsystem according to the start time and stop time;

[0201] Obtaining a reference input flow, a reference input temperature, a reference input humidity, and current weather data corresponding to the aircraft, and finding a unit cooling and heating capacity corresponding to the reference input flow, the reference input temperature, the reference input humidity, and the current weather data,

[0202] Predicting the cooling and heating capacity according to the operating time and the unit cooling and heating capacity to obtain a prediction result;

[0203] The length, first cross-sectional area, and temperature difference between both ends of the air-conditioning duct in the air-conditioning subsystem connected to the aircraft, as well as the air density and air specific heat capacity corresponding to the geographical location of the aircraft are obtained, and the loss value of the duct is calculated according to the length, first cross-sectional area, temperature difference between both ends, air density, and air specific heat capacity, and the calculation formula is:

[0204] δ=(ρ*σ*(A1*L)*(Δt));

[0205] Among them, δ represents the loss value, ρ represents the air density, σ represents the specific heat capacity of air, A1 represents the first cross-sectional area, L represents the length of the pipeline, and Δt represents the temperature difference between the two ends;

[0206] The prediction result is corrected according to the loss value to obtain the cooling and heating amount.

[0207] The specific implementation of the metering system for the ground service system of the present invention is basically the same as the above-mentioned embodiments of the metering method for the ground service system, and will not be repeated here.

[0208] The embodiment of the present invention further provides a storage medium having a metering program stored thereon, and when the metering program is executed by a processor, the steps of the metering method for a ground service system as described above are implemented.

[0209] The storage medium of the present invention may be a computer-readable storage medium, and its implementation method is substantially the same as the above-mentioned embodiments of the metering method for a ground service system, and will not be described in detail herein.

[0210] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims. All equivalent structures or equivalent process changes made using the contents of the specification and drawings of the present invention, or directly or indirectly used in other related technical fields, are protected by the present invention.

Claims

1. A metering method for a ground service system, characterized in that: The ground service system is set up in the underground corridor of the airport apron, and includes multiple subsystems, each of which corresponds to a parking stand in the airport apron, and is used to provide power, clean water, air conditioning, and sewage treatment for the aircraft parked at the parking stand; The measurement method includes: When a service request instruction triggered by an aircraft parked at a parking space on an airport apron is detected, a target subsystem corresponding to the aircraft is determined from the plurality of subsystems; Based on the detection device in the target subsystem, the power corresponding to the power supply provided by the target subsystem to the aircraft, the cooling and heating amount corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft are measured; The target subsystem includes a power subsystem, a clean water subsystem, a sewage subsystem, and an air conditioning subsystem, and the detection device includes an electric quantity detection device, a clean water flow meter, a sewage flow meter, and an air conditioning detection device; The step of measuring the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem includes: Obtaining a transformation ratio corresponding to a current transformer in the power detection device and a reading of an electric meter in the power detection device, and calculating the amount of power provided by the power subsystem to the aircraft based on the transformation ratio and the reading; Acquire a clean water measurement value detected by the clean water flow meter and a clean water reference error interval corresponding to the clean water measurement value, and correct the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft; Acquire a sewage measurement value detected by the sewage flow meter and a sewage reference error interval corresponding to the sewage measurement value, and correct the sewage measurement value based on the sewage reference error interval to obtain a sewage volume treated by the sewage subsystem on the aircraft; Obtaining wind speed values, temperature values, humidity values, and pressure values ​​detected by an anemometer, a thermometer, a hygrometer, and a pressure gauge in the air conditioning detection device, and determining the amount of cooling and heating provided by the air conditioning subsystem to the aircraft based on the wind speed values, temperature values, humidity values, and pressure values; The step of determining the target subsystem corresponding to the aircraft from the plurality of subsystems comprises: Outputting the metering modes of the clean water volume, the sewage volume and the cooling and heating volume respectively, and accepting the selection instructions returned based on each of the metering modes respectively; If the metering mode corresponding to the clean water volume and the sewage volume in the selection instruction is metering by times, the operation times of the clean water subsystem and the sewage subsystem corresponding to the aircraft are counted respectively, and the clean water volume and the sewage volume are measured respectively according to each of the operation times; If the metering mode corresponding to the cooling and heating amount in the selection instruction is time-based metering, the operation time of the air-conditioning subsystem is counted, and the cooling and heating amount is measured according to the operation time; If the metering mode corresponding to the selection instruction does not include per-time metering and per-hour metering, the step of measuring the amount of electricity corresponding to the power supply provided by the target subsystem to the aircraft, the amount of cooling and heating corresponding to the air conditioner, the amount of clean water, and the amount of sewage treated in the aircraft based on the detection device in the target subsystem is performed; The step of counting the operating time of the air conditioning subsystem and measuring the cooling and heating amount according to the operating time comprises: Identifying the start time and stop time of the air conditioning subsystem, and determining the operation time of the air conditioning subsystem according to the start time and stop time; Obtaining a reference input flow, a reference input temperature, a reference input humidity, and current weather data corresponding to the aircraft, and finding a unit cooling and heating capacity corresponding to the reference input flow, the reference input temperature, the reference input humidity, and the current weather data, Predicting the cooling and heating capacity according to the operating time and the unit cooling and heating capacity to obtain a prediction result; The length, first cross-sectional area, and temperature difference between both ends of the air-conditioning duct in the air-conditioning subsystem connected to the aircraft, as well as the air density and air specific heat capacity corresponding to the geographical location of the aircraft are obtained, and the loss value of the duct is calculated according to the length, first cross-sectional area, temperature difference between both ends, air density, and air specific heat capacity, and the calculation formula is: δ=(ρ*σ*(A1*L)*(Δt)); Among them, δ represents the loss value, ρ represents the air density, σ represents the specific heat capacity of air, A1 represents the first cross-sectional area, L represents the length of the pipeline, and Δt represents the temperature difference between the two ends; The prediction result is corrected according to the loss value to obtain the cooling and heating amount.

2. The measuring method according to claim 1, characterized in that: The air conditioning subsystem includes an air inlet and an air outlet, the temperature value includes an air inlet dry bulb temperature corresponding to the air inlet and an air outlet dry bulb temperature corresponding to the air outlet, the humidity value includes air inlet air humidity content and air outlet air humidity content, and the pressure value includes a first end pressure value and a second end pressure value of an air conditioning duct in the air conditioning subsystem that is connected to the aircraft; The step of determining the cooling and heating amount provided by the air conditioning subsystem to the aircraft according to the wind speed value, the temperature value, the humidity value and the pressure value comprises: Acquire the geographical location information of the aircraft, and the local atmospheric pressure and air density corresponding to the geographical location information, and generate the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure; Generating an enthalpy value of the inlet air according to the inlet dry-bulb temperature and the inlet air humidity, and generating an enthalpy value of the outlet air according to the outlet dry-bulb temperature and the outlet air humidity; The cooling and heating amount is determined according to the air flow, the inlet air enthalpy value, the outlet air enthalpy value, the air density and the moisture content of the air at the air outlet.

3. The measuring method according to claim 2, characterized in that: The step of generating the air flow rate of the air outlet of the air conditioning subsystem according to the wind speed value, the first end pressure value, the second end pressure value and the local atmospheric pressure comprises: Generate the first end pressure value and the second end pressure value as the relative pressure difference of the air conditioning pipeline, and find a reference pressure difference coefficient corresponding to the relative pressure difference; Finding a reference temperature coefficient corresponding to the dry-bulb temperature of the air outlet and a reference factor coefficient corresponding to the anemometer; The air flow rate at the air outlet of the air conditioning subsystem is calculated according to the first cross-sectional area of ​​the air conditioning duct, the wind speed value, the local atmospheric pressure, the reference pressure difference coefficient, the reference temperature coefficient, and the reference factor coefficient. The calculation formula is: Among them, q is the air flow rate, C is the wind speed value, A1 is the first cross-sectional area, P1 is the reference pressure difference coefficient, P3 is the standard atmospheric pressure, P2 is the local atmospheric pressure, w is the reference temperature coefficient, n is the number of anemometer's own factors, and ki is the reference factor coefficient corresponding to the i-th own factor.

4. The measuring method according to claim 1, characterized in that: The step of calculating the amount of electricity provided by the power subsystem to the aircraft includes: Obtaining mutual inductance parameters of the current transformer, the mutual inductance parameters including winding impedance of the secondary winding, load impedance, average length of the iron core magnetic circuit, second cross-sectional area of ​​the iron core, number of turns of the secondary winding, electromotive force on the secondary side, input current frequency, hysteresis angle of the iron core, and impedance angle of the secondary winding; Finding a core loss coefficient corresponding to the current transformer, and determining a magnetic density corresponding to the current transformer according to the core loss coefficient, the electromotive force, the input current frequency, the number of turns and the second cross-sectional area, and determining a magnetic permeability corresponding to the current transformer according to the magnetic density and the magnetic field strength corresponding to the current transformer; According to the winding impedance, load impedance, average length, input current frequency, number of turns, magnetic permeability and second cross-sectional area, the error parameter of the current transformer is calculated, and the calculation formula is: Wherein, γ represents the error parameter, Z1 represents the winding impedance, Z2 represents the load impedance, L represents the average length, f represents the input current frequency, N2 represents the number of turns, u represents the magnetic permeability, and A2 represents the second cross-sectional area; The ratio difference and the angle difference of the current transformer are determined according to the error parameter, the hysteresis angle and the impedance angle, and the electrical quantity is corrected according to the ratio difference and the angle difference.

5. The measuring method according to claim 1, characterized in that: The step of correcting the clean water measurement value based on the clean water reference error interval to obtain the clean water volume provided by the clean water subsystem to the aircraft comprises: Generate the clean water reference error interval as an average error flow rate, and obtain the clean water reference temperature and reference pressure corresponding to the clean water reference flow rate interval, and the clean water current temperature and current pressure corresponding to the clean water flow meter; Based on the average error flow rate, the clean water reference temperature, the reference pressure, and the current clean water temperature and the current pressure, a correction flow rate corresponding to the average error flow rate is calculated, and the calculation formula is: V=Vs*[1-(C1-C2)]*[1+(D1-D2)]; Wherein, V represents the corrected flow rate, Vs represents the average error flow rate, C1 represents the reference temperature of clean water, C2 represents the current temperature of clean water, D1 represents the reference pressure, and D2 represents the current pressure; The clean water measurement value is corrected according to the corrected flow rate to obtain the clean water volume.

6. A metering system for a ground service system, characterized in that: The metering system includes a server and a communication bus, and the server is communicatively connected with the ground service system via the communication bus; The server includes a processor and a storage connected to the processor in communication, wherein a control program is stored in the storage: The processor is used to execute the control program to implement the steps of the metering method for a ground service system according to any one of claims 1 to 5.

7. A storage medium, characterized in that: The storage medium stores a control program, and when the control program is executed by the processor, the steps of the metering method for a ground service system as described in any one of claims 1 to 5 are implemented.

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