A method, system, medium and device for controlling fresh air volume of air conditioner in rail vehicle

Abstract

The present application provides a method, system, medium and equipment for controlling the air conditioning fresh air volume of a rail vehicle, which relates to the field of rail transit technology, including: obtaining the load-bearing data of the vehicle bogie corresponding to each car; determining the load condition of the corresponding car according to the load-bearing data; determining the fresh air volume of the car according to the load condition; controlling the fresh air damper actuator to adjust the damper angle of the corresponding car according to the optimized fresh air volume after optimizing the fresh air volume based on the carbon dioxide concentration, so as to control the air conditioning fresh air volume of each car of the rail vehicle. The present application can avoid the regional limitations of carbon dioxide detected by the carbon dioxide sensor, accurately determine the number of people in the car through the load-bearing data of the vehicle bogie, thereby providing passengers with a fresh air volume that matches the number of people, ensuring that the temperature and humidity in the car remain relatively stable, and improving the riding comfort of passengers.

Description

Technical Field

[0001] The present application relates to the field of rail transit technology, and in particular to a method, system, medium and device for controlling fresh air volume of air conditioning in rail vehicles. Background Art

[0002] Train air conditioning fresh air control refers to the regulation and management of the amount of fresh air introduced into the train air conditioning system. Its purpose is to achieve energy saving and efficient operation of the system while ensuring the air quality and passenger comfort in the carriage.

[0003] Currently, the fresh air volume is adjusted mainly by monitoring the CO2 concentration (Parts Per Million, PPM) in the car. This fresh air control depends on the CO2 value detected by the CO2 sensor installed in the air conditioning system. However, the range of the CO2 sensor is limited to covering some areas in the car. Every time the train opens the body side door for at least 25 seconds at each station, the CO2 concentration will decrease by about 35% even if the number of passengers on the car does not change. Therefore, inaccurate fresh air control will cause unstable HVAC (Heating Ventilation and Air Conditioning) operation mode, especially the operation of the air compressor, making it difficult to control the temperature / humidity in the car and provide a comfortable environment for passengers. Summary of the invention

[0004] The purpose of the present application is to provide a method, system, computer-readable storage medium and electronic device for controlling the fresh air volume of air conditioning in a rail vehicle, which can accurately and stably control the fresh air volume of air conditioning in the compartment.

[0005] In order to solve the above technical problems, the present application provides a method for controlling the fresh air volume of air conditioning in a rail vehicle, and the specific technical solution is as follows:

[0006] Obtain the load-bearing data of the vehicle bogie corresponding to each carriage;

[0007] Determining the load condition of the corresponding carriage according to the load-bearing data;

[0008] determining the fresh air volume of the compartment according to the load condition;

[0009] Obtain the concentration data of the carbon dioxide sensors in each compartment;

[0010] Calculating the cabin ventilation rate according to the concentration data;

[0011] Adjusting the fresh air volume according to the compartment ventilation rate to obtain an optimized fresh air volume;

[0012] According to the optimized fresh air volume, the fresh air damper actuator is controlled to adjust the damper angle of the corresponding compartment to control the air conditioning fresh air volume of each compartment of the rail vehicle;

[0013] Wherein, when calculating the compartment ventilation rate according to the concentration data, it also includes:

[0014] Calculate the difference between the concentration data of the current cycle and the concentration data of the previous cycle;

[0015] If the difference is less than the set hysteresis, continue to obtain the concentration data of the carbon dioxide sensors in each compartment until the difference is not less than the set hysteresis;

[0016] If the difference is not less than the set hysteresis, the step of calculating the vehicle compartment ventilation rate according to the concentration data is executed.

[0017] Optionally, obtaining the load-bearing data of the vehicle bogie corresponding to each carriage includes:

[0018] The train control and management system is used to obtain the load-bearing data of the sensors on the bogies of the corresponding vehicles in each carriage.

[0019] Optionally, determining the load condition of the corresponding carriage according to the load-bearing data includes:

[0020] Determine the number of people per unit area of ​​the carriage according to the load-bearing data and the average mass of the human body;

[0021] The load condition is determined according to the number of people per unit area of ​​the carriage.

[0022] Optionally, determining the fresh air volume of the compartment according to the load condition includes:

[0023] Obtain the mapping relationship between load conditions and fresh air volume;

[0024] The fresh air volume corresponding to the load condition of each compartment is determined according to the mapping relationship.

[0025] Optionally, before obtaining the mapping relationship between the load condition and the fresh air volume, the following steps are included:

[0026] The mapping relationship between the load condition and the fresh air volume is determined according to the changes in train energy consumption, the number of passengers and the carbon dioxide concentration; wherein the mapping relationship is that the ratio of the fresh air volume to the number of passengers first increases and then decreases as the number of passengers increases.

[0027] The present application also provides a rail vehicle air conditioning fresh air volume control system, comprising:

[0028] A load-bearing data acquisition module is used to obtain the load-bearing data of the vehicle bogie corresponding to each carriage;

[0029] A load condition determination module, used to determine the load condition of the corresponding carriage according to the load-bearing data;

[0030] A fresh air volume determination module, used to determine the fresh air volume of the compartment according to the load condition;

[0031] A carbon dioxide auxiliary adjustment module is used to obtain concentration data of carbon dioxide sensors in each compartment; calculate the compartment ventilation rate according to the concentration data; adjust the fresh air volume according to the compartment ventilation rate to obtain an optimized fresh air volume;

[0032] A fresh air volume control module, used to control the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the optimized fresh air volume, so as to control the air conditioning fresh air volume of each compartment of the rail vehicle;

[0033] The hysteresis determination module is used to calculate the difference between the concentration data of the current cycle and the concentration data of the previous cycle; if the difference is less than the set hysteresis, continue to obtain the concentration data of the carbon dioxide sensors in each compartment until the difference is not less than the set hysteresis; if the difference is not less than the set hysteresis, enter the carbon dioxide auxiliary adjustment module to execute the step of calculating the compartment ventilation rate according to the concentration data.

[0034] Optionally, the load-bearing data acquisition module is used to obtain the load-bearing data of sensors on the vehicle bogie corresponding to each carriage using the train control and management system.

[0035] Optionally, the load condition determination module includes:

[0036] A number calculation unit, used to determine the number of people per unit area of ​​the carriage according to the load-bearing data and the average mass of the human body;

[0037] The working condition confirmation unit is used to determine the load working condition according to the number of people per unit area of ​​the carriage.

[0038] Optionally, the fresh air volume determination module is a module for obtaining a mapping relationship between load conditions and fresh air volumes; and determining the fresh air volume corresponding to the load conditions of each compartment according to the mapping relationship.

[0039] Optionally, also include:

[0040] A mapping relationship determination module is used to determine the mapping relationship between the load condition and the fresh air volume according to the train energy consumption, the number of passengers and the change of carbon dioxide concentration; wherein the mapping relationship is that the ratio of the fresh air volume to the number of passengers first increases and then decreases as the number of passengers increases.

[0041] The present application also provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements the steps of the above-mentioned method when executed by a processor.

[0042] The present application also provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the above-mentioned method when calling the computer program in the memory.

[0043] The present application provides a method for controlling the air conditioning fresh air volume of a rail vehicle, comprising: obtaining the load-bearing data of a vehicle bogie corresponding to each compartment; determining the load condition of the corresponding compartment according to the load-bearing data; determining the fresh air volume of the compartment according to the load condition; obtaining the concentration data of the carbon dioxide sensor in each compartment; calculating the compartment ventilation rate according to the concentration data; adjusting the fresh air volume according to the compartment ventilation rate to obtain an optimized fresh air volume; controlling the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the optimized fresh air volume to control the air conditioning fresh air volume of each compartment of the rail vehicle; wherein, when calculating the compartment ventilation rate according to the concentration data, it also includes: calculating the difference between the concentration data of the current cycle and the concentration data of the previous cycle; if the difference is less than the set hysteresis, continuing to obtain the concentration data of the carbon dioxide sensor in each compartment until the difference is not less than the set hysteresis; if the difference is not less than the set hysteresis, executing the step of calculating the compartment ventilation rate according to the concentration data.

[0044] The present application determines the load condition of the carriage by obtaining the load-bearing data of the vehicle bogie corresponding to the carriage, and the load condition can accurately reflect the number of people in the carriage, and determines the fresh air volume of each carriage accordingly, thereby adjusting the air door angle, which can avoid the regional limitation of carbon dioxide detected by the carbon dioxide sensor. The number of people in the carriage is accurately determined by the load-bearing data of the vehicle bogie, and the fresh air volume is further optimized in combination with the concentration data of the carbon dioxide sensor in the carriage, so as to provide passengers with a fresh air volume that matches the number of people, ensure that the temperature and humidity in the carriage remain relatively stable, and improve the riding comfort of passengers.

[0045] The present application also provides a rail vehicle air conditioning fresh air volume control system, a computer-readable storage medium and an electronic device, which have the above-mentioned beneficial effects and are not described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0047] Figure 1 A flow chart of a method for controlling fresh air volume of air conditioning in a rail vehicle provided in an embodiment of the present application;

[0048] Figure 2A schematic diagram of a fresh air volume control process for air conditioning of a rail vehicle provided in an embodiment of the present application;

[0049] Figure 3 A schematic diagram of the structure of a fresh air volume control system for air conditioning of a rail vehicle provided in an embodiment of the present application;

[0050] Figure 4 A structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] The object information involved in this application, including but not limited to the object device information, object personal information, etc., and data, including but not limited to data used for analysis, stored data, displayed data, etc., are all information and data authorized by the object or fully authorized by all parties.

[0053] For the specific process, please refer to Figure 1 , Figure 1 A flow chart of a method for controlling fresh air volume of air conditioning in a rail vehicle provided in an embodiment of the present application:

[0054] S101: Obtaining the load-bearing data of the vehicle bogie corresponding to each carriage;

[0055] S102: Determine the load condition of the corresponding carriage according to the load-bearing data;

[0056] S103: Determine the fresh air volume of the compartment according to the load condition;

[0057] S104: Acquiring concentration data of carbon dioxide sensors in each compartment;

[0058] S105: Calculating the cabin ventilation rate according to the concentration data;

[0059] S106: adjusting the fresh air volume according to the compartment ventilation rate to obtain an optimized fresh air volume;

[0060] S107: Controlling the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the optimized fresh air volume.

[0061] First, obtain the load-bearing data of the vehicle bogie corresponding to each carriage, and judge the load condition accordingly. Specifically, the train control and management system can be used to obtain the load-bearing data of the sensors on the vehicle bogie corresponding to each carriage. The Train Control and Management System (TCMS) is responsible for processing and distributing various internal and external data during train operation to ensure the normal operation and safety of the train. It integrates multiple subsystems to control the direction, speed and interval of the train, while monitoring the train status to ensure operation efficiency and safety.

[0062] The vehicle bogie is a key component of a railway vehicle. It not only supports the vehicle body, but also ensures that the vehicle runs smoothly on the track. In order to obtain the load-bearing data of the vehicle bogie corresponding to each carriage. When obtaining the vehicle bogie, the sensor installed on the vehicle bogie can be used to directly obtain the load-bearing data. It is also possible to install an ultrasonic rangefinder on the car body and the bogie to measure the relative distance between the car body and the bogie in real time. Through geometric calculations, combined with these measurement data, the running posture of the vehicle bogie relative to the car body can be calculated, and then the load-bearing data can be calculated.

[0063] It should be emphasized that when the present embodiment is applied to control the air conditioning fresh air volume of rail vehicles, the carriage is used as a unit. Since the actual number of people in each carriage varies, the corresponding air conditioning fresh air volume also has corresponding control differences.

[0064] There is no limitation on the setting method of the load condition here. For example, in urban rail transit, the four load conditions AW0 to AW3 are important parameters for measuring the train passenger capacity and design operation standards. AW0 specifically refers to the state of a subway vehicle without passengers, that is, completely empty. Therefore, the number of people per unit area in the car can be determined based on the load-bearing data and the average mass of the human body, and the actual load condition of the car can be determined based on the number of people per unit area in the car.

[0065] Specifically, AW0 can be used to represent the situation when the vehicle is unloaded; AW1 represents the situation when the vehicle is fully occupied; AW2 represents the situation when the vehicle is fully loaded (with 6 people per square meter), i.e., the rated load; AW3 represents the situation when the vehicle is overloaded (with 9 people per square meter); and AW4 represents the situation when the vehicle is overloaded (with 12 people per square meter).

[0066] Even if the passengers are not evenly distributed in the car, the weight value provided by the train control and management system can still accurately reflect the number of people. It is not affected by the opening and closing of the doors when stopping at the station. The weight value can accurately reflect the number of passengers. Using the load condition fed back by the load bearing data, the HVAC heating, ventilation and air conditioning system can operate stably, avoiding frequent operation of the damper, and the compressor and condenser fans can operate stably to provide a comfortable environment for passengers.

[0067] Thereafter, the fresh air volume of the carriage can be determined according to the load condition, that is, the fresh air volume of the carriage is mainly determined according to the number of people in the carriage. Specifically, a mapping relationship between the load condition and the fresh air volume can be obtained, and the fresh air volume corresponding to the load condition of each carriage can be determined according to the mapping relationship. The mapping relationship can be determined based on the train energy consumption, the number of passengers, and the change in carbon dioxide concentration to determine the mapping relationship between the load condition and the fresh air volume.

[0068] In a feasible implementation, the mapping relationship is that the ratio of the fresh air volume to the number of passengers increases first and then decreases as the number of passengers increases. See Table 1, which is a schematic diagram of the relationship between load-bearing data and the fresh air volume. It should be noted that the fresh air volume / passenger, fresh air volume / car and fresh air volume / unit set in Table 1 are all exemplary data.

[0069] Table 1 Schematic diagram of the relationship between load-bearing data and fresh air volume

[0070]

[0071] It can be seen that it is necessary to consider the fresh air demand under different passenger load conditions to ensure that sufficient fresh air volume is provided under any circumstances. By dynamically adjusting the output of the fresh air system, the fresh air volume is adjusted according to the actual number of passengers to optimize energy efficiency and passenger comfort. However, considering energy consumption, the upper limit of the fresh air volume power and the train operating power, when the number of passengers is high, such as overload, the average fresh air volume per passenger no longer continues to increase with the increase in the number of passengers.

[0072] After the fresh air volume is determined, the fresh air damper actuator can be controlled to adjust the damper angle of the corresponding compartment according to the fresh air volume to control the air conditioning fresh air volume of each compartment of the rail vehicle. Specifically, the fresh air damper can be regulated by the air conditioning controller under the train control and management system.

[0073] When regulating the fresh air damper, the fresh air volume can be regulated by adjusting the damper opening and damper operation time. For example, proportional control can be used to gradually adjust the damper opening according to actual needs to achieve the expected fresh air volume. The damper operation time can also be regulated by timing control, continuous operation or intermittent operation.

[0074] The embodiment of the present application determines the load condition of the car by obtaining the load-bearing data of the vehicle bogie corresponding to the car, and the load condition can accurately reflect the number of people in the car, and determine the amount of fresh air in each car accordingly, so as to adjust the angle of the damper, which can avoid the regional limitation of carbon dioxide detected by the carbon dioxide sensor, and accurately determine the number of people in the car through the load-bearing data of the vehicle bogie, so as to provide passengers with a fresh air volume that matches the number of people, ensure that the temperature and humidity in the car remain relatively stable, and improve the riding comfort of passengers.

[0075] Taking into account the weight of luggage and the movement of passengers in the car, the CO2 sensor serves as an auxiliary control.

[0076] The differential equation for calculating the ventilation rate in the vehicle is as follows:

[0077] ;

[0078] in, Indicates the CO2 concentration in the car at time t, in ppm;

[0079] It represents the CO2 concentration in fresh air in ppm; V represents the volume of the compartment, which is the air volume minus the passenger volume in cubic meters; represents the fresh air volume in cubic meters per hour; N represents the number of passengers; Indicates the amount of CO2 exhaled by each passenger in liters per hour.

[0080] The general solution to the differential equation is:

[0081] ;

[0082] The CO2 concentration in fresh air is 400 - 500 [ppm]. 400 [ppm] can be used in the calculation; Under normal conditions (20℃ / 50%, 1 atmosphere), the average CO2 exhaled per person is 32[g / h]≈17.5[l / h].

[0083] According to the above formula, the concentration of carbon dioxide in the car can be detected, and the fresh air volume can be adjusted according to the carbon dioxide concentration.

[0084] At this point, the specific execution process can be found in Figure 2 , Figure 2 A schematic diagram of the air conditioning fresh air volume control process of a rail vehicle provided in an embodiment of the present application. For any carriage of a rail vehicle, the train control and management system TCMS receives the axle weight signal of the vehicle bogie corresponding to the carriage, and the axle weight signal can feed back the load-bearing data of the vehicle bogie. At the same time, the train control and management system TCMS receives the CO2 concentration signal uploaded by the CO2 sensor of the carriage, and sends it to the air conditioning controller of the corresponding carriage. The air conditioning fresh air volume control method described in the above embodiment is used to calculate the fresh air damper opening, which is then handed over to the fresh air damper actuator for actual regulation.

[0085] It should also be noted that due to the frequent boarding and alighting of passengers in application scenarios such as urban subways and light rail vehicles, the carbon dioxide concentration data fluctuates greatly. In order to avoid frequent fluctuations in the fresh air control synchronization due to frequent fluctuations in the carbon dioxide concentration, a set hysteresis can be set, that is, the step of calculating the car ventilation rate according to the concentration data is executed only when the difference in the carbon dioxide concentration data is not less than the set hysteresis.

[0086] The difference can be calculated by setting a calculation cycle, that is, each period of time is regarded as a carbon dioxide monitoring cycle, and the specific duration of the calculation cycle is not specifically limited here.

[0087] See Table 2, which is a feasible relationship table for controlling the fresh air volume of air conditioner by combining load conditions and carbon dioxide monitoring values.

[0088] Table 2 Relationship between load conditions and carbon dioxide monitoring values ​​for air conditioning fresh air volume control

[0089]

[0090] In the application of this embodiment, if a communication error occurs between the train control and management system and the air conditioning system control signal, or the load condition corresponding to the CO2 value is higher than the load condition corresponding to the weight signal, it means that the total number of passengers is low, and the overflow of the CO2 value is due to the uneven distribution of CO2 in the car caused by the local concentration of passengers. At the same time, the influence of the door switch on the change of the CO2 value when the subway and light rail vehicles in the city stop at each station is considered. At this time, using the weight signal as the corresponding load condition can achieve energy-saving effects. This is because the load-bearing data fed back by the vehicle bogie is extremely reliable, and its weight is obtained by measuring the weight on the actual vehicle according to the bogie spring. The number of passengers is actually equivalent to the weight information measured by the bogie spring, that is, the load-bearing data of the vehicle bogie obtained.

[0091] On the other hand, by applying this embodiment, after the long-distance intercity train runs stably, if the train weight signal feedback is abnormal, or the load converted from the CO2 detection value is less than the feedback value in the detection weight signal, it means that the actual number of passengers is small and the extra weight comes more from luggage. At this time, the load condition can also be determined according to the concentration of carbon dioxide, and the energy saving effect can also be achieved.

[0092] This allows for precise fresh air control based on the number of passengers on board. Precise fresh air control allows for stable VAC operation, providing a comfortable environment for passengers. At the same time, by adjusting the damper operation, the air conditioning system will not consume additional power due to frequent changes in operation mode.

[0093] See also Figure 3 , Figure 3This is a schematic diagram of the structure of a fresh air volume control system for air conditioning of a rail vehicle provided in an embodiment of the present application. The present application also provides a fresh air volume control system for air conditioning of a rail vehicle, including:

[0094] A load-bearing data acquisition module is used to obtain the load-bearing data of the vehicle bogie corresponding to each carriage;

[0095] A load condition determination module, used to determine the load condition of the corresponding carriage according to the load-bearing data;

[0096] A fresh air volume determination module, used to determine the fresh air volume of the compartment according to the load condition;

[0097] A carbon dioxide auxiliary adjustment module is used to obtain concentration data of carbon dioxide sensors in each compartment; calculate the compartment ventilation rate according to the concentration data; adjust the fresh air volume according to the compartment ventilation rate to obtain an optimized fresh air volume;

[0098] The fresh air volume control module is used to control the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the optimized fresh air volume, so as to control the air-conditioning fresh air volume of each compartment of the rail vehicle.

[0099] exist Figure 3 On the basis of this, it can also include a hysteresis judgment module, which is used to calculate the difference between the concentration data of the current cycle and the concentration data of the previous cycle; if the difference is less than the set hysteresis, continue to obtain the concentration data of the carbon dioxide sensors in each compartment until the difference is not less than the set hysteresis; if the difference is not less than the set hysteresis, enter the carbon dioxide auxiliary adjustment module to execute the step of calculating the compartment ventilation rate according to the concentration data.

[0100] The air volume control module is used to control the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the fresh air volume, so as to control the air conditioning fresh air volume of each compartment of the rail vehicle.

[0101] The embodiment of the present application uses a load-bearing data acquisition module to obtain the load-bearing data of the vehicle bogie corresponding to the car, and inputs it into the load condition determination module to determine the load condition of the car. The fresh air volume determination module can feedback the number of people in the car according to the load condition, and determine the fresh air volume of each car accordingly, so that the air volume control module is used to adjust the air door angle, which can avoid the regional limitations of carbon dioxide detected by the carbon dioxide sensor. The number of people in the car is accurately determined by the load-bearing data of the vehicle bogie, thereby providing passengers with a fresh air volume that matches the number of people, ensuring that the temperature and humidity in the car remain relatively stable, and improving passenger comfort.

[0102] Based on the above embodiments, as a preferred embodiment, the load-bearing data acquisition module is used to obtain the load-bearing data of the sensors on the vehicle bogie corresponding to each carriage by using the train control and management system.

[0103] Based on the above embodiment, as a preferred embodiment, the load condition determination module includes:

[0104] A number calculation unit, used to determine the number of people per unit area of ​​the carriage according to the load-bearing data and the average mass of the human body;

[0105] The working condition confirmation unit is used to determine the load working condition according to the number of people per unit area of ​​the carriage.

[0106] Based on the above embodiments, as a preferred embodiment, the fresh air volume determination module is a module for obtaining the mapping relationship between the load condition and the fresh air volume; and determining the fresh air volume corresponding to the load condition of each compartment according to the mapping relationship.

[0107] Based on the above embodiments, as a preferred embodiment, it also includes:

[0108] A mapping relationship determination module is used to determine the mapping relationship between the load condition and the fresh air volume according to the train energy consumption, the number of passengers and the change of carbon dioxide concentration; wherein the mapping relationship is that the ratio of the fresh air volume to the number of passengers first increases and then decreases as the number of passengers increases.

[0109] The present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, the steps provided in the above embodiment can be implemented. The storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0110] The present application also provides an electronic device, see Figure 4 , a structural diagram of an electronic device provided in an embodiment of the present application, such as Figure 4 As shown, a processor 1410 and a memory 1420 may be included.

[0111] Among them, the processor 1410 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 1410 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 1410 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 1410 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 1410 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0112] The memory 1420 may include one or more computer-readable storage media, which may be non-transitory. The memory 1420 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 1420 is at least used to store the following computer program 1421, wherein, after the computer program is loaded and executed by the processor 1410, it can implement the relevant steps in the method performed by the electronic device side disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 1420 may also include an operating system 1422 and data 1423, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 1422 may include Windows, Linux, Android, etc.

[0113] In some embodiments, the electronic device may further include a display screen 1430 , an input / output interface 1440 , a communication interface 1450 , a sensor 1460 , a power source 1470 , and a communication bus 1480 .

[0114] certainly, Figure 4 The structure of the electronic device shown does not constitute a limitation on the electronic device in the embodiments of the present application. In actual applications, the electronic device may include Figure 4 More or fewer components than shown, or combinations of certain components.

[0115] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system provided in the embodiment, since it corresponds to the method provided in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0116] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

[0117] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A method for controlling fresh air volume of air conditioning in a rail vehicle, characterized in that: include: Obtain the load-bearing data of the vehicle bogie corresponding to each carriage; Determining the load condition of the corresponding carriage according to the load-bearing data; determining the fresh air volume of the compartment according to the load condition; Obtain the concentration data of the carbon dioxide sensors in each compartment; Calculate the carbon dioxide concentration at time t based on the general solution of the ventilation rate differential equation; Among them, the general solution of the ventilation rate differential equation is: ; represents the carbon dioxide concentration in the car at time t, represents the fresh air volume, V represents the volume of the carriage, and N represents the number of passengers; represents the amount of carbon dioxide exhaled by each passenger, is the concentration of carbon dioxide in fresh air; Adjust the fresh air volume according to the carbon dioxide concentration at time t to obtain an optimized fresh air volume; According to the optimized fresh air volume, the fresh air damper actuator is controlled to adjust the damper angle of the corresponding compartment to control the air conditioning fresh air volume of each compartment of the rail vehicle; Among them, when calculating the carbon dioxide concentration at time t according to the general solution of the ventilation rate differential equation, it also includes: Calculate the difference between the concentration data of the carbon dioxide sensor in the current cycle and the concentration data of the carbon dioxide sensor in the previous cycle; If the difference is less than the set hysteresis, continue to obtain the concentration data of the carbon dioxide sensors in each compartment until the difference is not less than the set hysteresis; If the difference is not less than the set hysteresis, the step of calculating the carbon dioxide concentration at time t is performed.

2. The air conditioning fresh air volume control method according to claim 1, characterized in that: Obtaining the load-bearing data of the vehicle bogie corresponding to each carriage includes: The train control and management system is used to obtain the load-bearing data of the sensors on the bogies of each carriage.

3. The air conditioning fresh air volume control method according to claim 1, characterized in that: Determining the load condition of the corresponding carriage according to the load-bearing data includes: Determine the number of people per unit area of ​​the carriage according to the load-bearing data and the average mass of the human body; The load condition is determined according to the number of people per unit area of ​​the carriage.

4. The air conditioning fresh air volume control method according to claim 3, characterized in that: Determining the fresh air volume in the compartment according to the load condition includes: Obtain the mapping relationship between load conditions and fresh air volume; The fresh air volume corresponding to the load condition of each compartment is determined according to the mapping relationship.

5. The air conditioning fresh air volume control method according to claim 4, characterized in that: Before obtaining the mapping relationship between load conditions and fresh air volume, it also includes: The mapping relationship between the load condition and the fresh air volume is determined according to the changes in train energy consumption, the number of passengers and the carbon dioxide concentration; wherein the mapping relationship is that the ratio of the fresh air volume to the number of passengers first increases and then decreases as the number of passengers increases.

6. A rail vehicle air conditioning fresh air volume control system, characterized in that: include: A load-bearing data acquisition module is used to obtain the load-bearing data of the vehicle bogie corresponding to each carriage; A load condition determination module, used to determine the load condition of the corresponding carriage according to the load-bearing data; A fresh air volume determination module, used to determine the fresh air volume of the compartment according to the load condition; A carbon dioxide auxiliary regulation module is used to calculate the carbon dioxide concentration at time t according to the general solution of the ventilation rate differential equation; and adjust the fresh air volume according to the carbon dioxide concentration at time t to obtain an optimized fresh air volume; Among them, the general solution of the ventilation rate differential equation is: ; represents the carbon dioxide concentration in the car at time t, represents the fresh air volume, V represents the volume of the carriage, and N represents the number of passengers; represents the amount of carbon dioxide exhaled by each passenger, is the concentration of carbon dioxide in fresh air; A fresh air volume control module, used to control the fresh air damper actuator to adjust the damper angle of the corresponding compartment according to the optimized fresh air volume, so as to control the air conditioning fresh air volume of each compartment of the rail vehicle; The hysteresis determination module is used to calculate the difference between the concentration data of the current cycle and the concentration data of the previous cycle; if the difference is less than the set hysteresis, continue to obtain the concentration data of the carbon dioxide sensors in each compartment until the difference is not less than the set hysteresis; if the difference is not less than the set hysteresis, enter the carbon dioxide auxiliary adjustment module to execute the step of calculating the carbon dioxide concentration at time t.

7. An electronic device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the method according to any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which implements the steps of the method according to any one of claims 1 to 5 when executed.

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