Roll-on ship vehicle cabin ventilation control method, device, control box and system for transportable livestock

Abstract

This invention relates to a ventilation control method, device, control box, and system for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock. The method involves acquiring environmental parameters within the vehicle compartment, including temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration; comparing each environmental parameter with its corresponding preset threshold conditions, where the preset threshold conditions correspond to the air exchange rate; and selecting the highest air exchange rate among those corresponding to the preset threshold conditions as the target air exchange rate. The method controls the operation of fans located at the front and rear of the vehicle compartment to achieve the target air exchange rate, enabling automatic fan adjustment. This allows the temperature, CO2 concentration, and PM2.5 / PM10 concentration within the vehicle compartment to be continuously maintained within a suitable range, improving environmental stability during livestock transportation, ensuring livestock survival rates, and correspondingly reducing the manual operation burden and operational risks for ship owners.

Description

Technical Field

[0001] This invention relates to the field of ship ventilation control technology, specifically to a ventilation control method, device, control box and system for the vehicle compartment of a roll-on / roll-off ship that can transport livestock. It is particularly suitable for scenarios where the temperature, CO2 concentration, PM2.5 concentration and PM10 concentration inside the vehicle compartment of a roll-on / roll-off ship are monitored and the ventilation rate of the fan is automatically adjusted during the transportation of livestock. Background Technology

[0002] Vehicle compartments on roll-on / roll-off (Ro-Ro) ships require ventilation fans. Current methods typically involve mechanical air supply or exhaust via fans at the front and rear of the vehicle compartment to maintain suitable temperature and air quality. However, existing Ro-Ro ships generally lack systems for monitoring environmental parameters in the vehicle compartment. When livestock are transported in the compartment, temperature and CO2 concentrations rise, and PM2.5 / PM10 levels may exceed standards. Currently, crew members must manually adjust fan speeds as needed, making it difficult to respond promptly to changes in the compartment environment. This compromises livestock survival rates during transport and negatively impacts shipowner operations. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method, device, control box, and system for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock.

[0004] In a first aspect, the present invention provides a ventilation control method for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, comprising: The environmental parameters inside the vehicle cabin are obtained, including temperature, CO2 concentration, PM2.5 concentration and PM10 concentration. The environmental parameters are compared with their respective preset grading conditions, which are the correspondence between the corresponding environmental parameters and the number of air changes. The highest number of air changes among the preset grading conditions satisfied by the environmental parameters is taken as the target number of air changes. Control the operation of the fans located at the front and rear of the vehicle compartment to achieve the target number of air changes in the vehicle compartment.

[0005] In other optional implementations, the preset grading conditions corresponding to each environmental parameter include: When the CO2 concentration reaches the first CO2 concentration range for a first preset time, the first number of air exchanges is reached. When the CO2 concentration reaches the second CO2 concentration range after a first preset time, the second number of air exchanges is reached. When the CO2 concentration remains in the third CO2 concentration range for the first preset time, the third air exchange number is reached. When the PM2.5 concentration remains within the first preset time range, corresponding to the first number of air changes; When the PM2.5 concentration remains in the first preset time until it reaches the second PM2.5 concentration range, the second number of air changes will be recorded. When the PM2.5 concentration remains in the third PM2.5 concentration range for the first preset time, it corresponds to the third air exchange rate. When the PM10 concentration remains in the first preset time range, corresponding to the first number of air changes; When the PM10 concentration remains in the first preset time until the second PM10 concentration range is reached, the second number of air changes will be corresponding to the second air exchange rate. When the PM10 concentration remains in the third PM10 concentration range for the first preset time, it corresponds to the third air exchange rate. The temperature remains at the first preset time until the temperature threshold is reached, corresponding to the third air exchange.

[0006] In other optional embodiments, the step of taking the highest air change rate among the air change rates corresponding to the preset grading conditions satisfied by the environmental parameters as the target air change rate includes: If only one preset grading condition is met, the number of air changes corresponding to that preset grading condition shall be taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is the same, then the same number of air changes is taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is different, then the highest number of air changes will be taken as the target number of air changes.

[0007] In other alternative implementations, the method further includes: Calculate the rate of change of each environmental parameter over time; When the rate of change of any environmental parameter exceeds its corresponding preset rate threshold and continues for a second preset time, if the current value of the environmental parameter has not yet met its corresponding preset classification condition, the target air exchange rate will be increased by one level. And / or, when the rate of change of any environmental parameter is negative and its absolute value exceeds its corresponding preset rate threshold, the target air exchange rate is reduced by one level.

[0008] In other alternative implementations, the method further includes: The historical navigation data of the roll-on / roll-off ship under the corresponding transportation conditions are obtained. The transportation conditions include at least one of route, season, livestock type and loading status. The historical navigation data includes historical temperature, historical CO2 concentration, historical PM2.5 concentration, historical PM10 concentration, historical wind turbine operating status and historical livestock survival rate. Based on the historical navigation data, the preset grading conditions are adjusted to obtain preset grading conditions corresponding to the corresponding transportation conditions. The preset grading conditions corresponding to the corresponding transportation conditions are used for ventilation control under the same or similar transportation conditions in the future.

[0009] In other optional implementations, adjusting the preset grading conditions based on the historical navigation data to obtain preset grading conditions corresponding to the corresponding transportation conditions includes: Based on the historical navigation data, adjust at least one of the following preset grading conditions for different transportation conditions: the number of air changes corresponding to each grading, the interval boundary or threshold of each grading.

[0010] In other alternative embodiments, the control of the operation of fans located at the front and rear ends of the vehicle compartment to achieve the target air exchange rate includes: Calculate the target total ventilation volume based on the target air exchange rate and vehicle compartment volume; Based on the target total ventilation volume, control the operation of the fans installed at the front and rear of the vehicle compartment so that the actual total ventilation volume of the fans reaches the target total ventilation volume; The control methods include at least one of the following: Adjust the fan speed using a frequency converter; Control the number of fans that start and stop; Adjust the opening of the damper; Control the proportion of time the fan runs per unit of time.

[0011] Secondly, the present invention provides a ventilation control device for the cargo hold of a roll-on / roll-off ship capable of transporting livestock, comprising: An environmental parameter acquisition module is used to acquire environmental parameters inside the vehicle cabin, including temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration. The grading condition comparison module is used to compare the environmental parameters with their respective preset grading conditions, wherein the preset grading conditions are the correspondence between the corresponding environmental parameters and the number of air changes. The target air change rate determination module is used to take the highest air change rate among the air change rates corresponding to the preset grading conditions satisfied by the environmental parameters as the target air change rate. The fan control module is used to control the operation of the fans installed at the front and rear of the vehicle compartment, so that the vehicle compartment can achieve the target number of air changes.

[0012] Thirdly, the present invention provides a wind turbine control box, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in memory, it implements the steps of the method for controlling ventilation in the cargo compartment of a roll-on / roll-off ship capable of transporting livestock as described in any of the first aspects. Fourthly, the present invention provides a ventilation control system for the vehicle compartment of a roll-on / roll-off ship used for transporting livestock, including a sensor assembly, a fan control box as described in the second aspect, and fans disposed at the front and rear ends of the vehicle compartment. The sensor assembly includes a temperature sensor, a CO2 sensor, a PM2.5 sensor, and a PM10 sensor, which are used to acquire the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration inside the vehicle cabin, respectively. The fan control box is connected to the sensor assembly and the fan respectively, and is used to control the operation of the fan according to the environmental parameters obtained by the sensor assembly, so that the vehicle compartment can reach the target air exchange rate.

[0013] The present invention provides a ventilation control method, device, control box, and system for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock. After acquiring temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration within the vehicle compartment, the environmental conditions can be continuously monitored, eliminating reliance on crew experience. Each environmental parameter is compared with its corresponding preset threshold, automatically determining the air exchange rate for each parameter. When multiple environmental parameters simultaneously meet the threshold, the highest air exchange rate is used as the target air exchange rate, and the ventilation intensity is determined according to the most stringent environmental requirements, preventing the fans from operating at a low speed even when a parameter exceeds the suitable range. Controlling the operation of fans located at the front and rear of the vehicle compartment ensures the target air exchange rate is achieved, and the ventilation volume can be adjusted promptly according to changes in environmental parameters, eliminating the need for repeated manual operation by crew. Therefore, the vehicle compartment temperature, CO2 concentration, and PM2.5 / PM10 can be continuously regulated within suitable ranges, improving environmental stability during livestock transportation, ensuring livestock survival rates, and correspondingly reducing the manual operation burden and operational risks for ship owners. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate examples consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0015] To more clearly illustrate the technical solutions in the examples of the present invention or the prior art, the drawings used in the description of the examples or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1A schematic diagram of the structure of a ventilation control system for a roll-on / roll-off ship vehicle compartment capable of transporting livestock, provided by the present invention. Figure 2 A flowchart illustrating a method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, provided by this invention. Figure 3a A top view of the arrangement of sensors and fans in a vehicle compartment provided by the present invention; Figure 3b A side view of the arrangement of sensors and fans in a vehicle compartment provided by the present invention; Figure 4 A schematic flowchart of another method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship for transporting livestock, provided by the present invention. Figure 5 A schematic flowchart illustrating another method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, provided by the present invention. Figure 6 A schematic diagram of the structure of a ventilation control device for a roll-on / roll-off ship vehicle compartment that can transport livestock, provided by the present invention. Figure 7 This invention provides a schematic diagram of the structure of a fan control box; 101-Sensor assembly; 102-Fan control box; 103-Fan. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples of the present invention, not all of them. All other examples obtained by those skilled in the art based on the examples in this invention without inventive effort are within the scope of protection of this invention.

[0018] Figure 1 A schematic diagram of a ventilation control system for the cargo hold of a roll-on / roll-off ship capable of transporting livestock, provided by the present invention, is shown below. Figure 1As shown, the system includes a sensor assembly 101, a fan control box 102, and fans 103. The sensor assembly 101 includes a temperature sensor, a CO2 sensor, a PM2.5 sensor, and a PM10 sensor, all located inside the vehicle compartment, for acquiring the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration inside the vehicle compartment, respectively. Multiple fans 103 are located at the front and rear ends of the vehicle compartment, for supplying and / or exhausting air into the vehicle compartment. The temperature sensor, CO2 sensor, PM2.5 sensor, and PM10 sensor are connected to the fan control box 102, preferably via signal lines, a communication bus, or wireless communication, to transmit the collected environmental parameter signals to the fan control box 102. The fan control box 102 is connected to the fans 103 located at the front and rear ends of the vehicle compartment, preferably via control cables, to output control signals to the fans 103. Based on the above connections, the fan control box 102 is used to execute the ventilation control method for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, as described in the following example.

[0019] In a first aspect, the present invention provides a method for controlling ventilation in the cargo hold of a roll-on / roll-off ship capable of transporting livestock. Figure 2 This invention provides a schematic flowchart of a ventilation control method for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock.

[0020] like Figure 2 As shown, the ventilation control method for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock includes: Step S101: Obtain environmental parameters inside the vehicle cabin, including temperature, CO2 concentration, PM2.5 concentration and PM10 concentration.

[0021] Specifically, the wind turbine control box 102 receives monitoring signals from the sensor assembly 101 installed inside the vehicle compartment, thereby obtaining the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration inside the vehicle compartment. The temperature sensor collects the temperature signal inside the vehicle compartment, the CO2 sensor collects the CO2 concentration signal, the PM2.5 sensor collects the PM2.5 concentration signal, and the PM10 sensor collects the PM10 concentration signal. Each sensor can collect data in real time or periodically according to a preset cycle, and transmits the collected signals to the wind turbine control box 102 via signal lines, communication buses, or wireless communication.

[0022] Step S102: Compare the environmental parameters with their respective preset grading conditions. The preset grading conditions are the correspondence between the corresponding environmental parameters and the number of air changes.

[0023] Specifically, the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration obtained in step S101 are compared with their respective preset classification conditions. The preset classification conditions are the correspondence between the corresponding environmental parameters and the number of air changes. That is, for each environmental parameter, its possible classification level or range is preset, and a correspondence between this level or range and the number of air changes is established. For example, temperature corresponds to temperature classification conditions, CO2 concentration corresponds to CO2 classification conditions, PM2.5 concentration corresponds to PM2.5 classification conditions, and PM10 concentration corresponds to PM10 classification conditions; each classification condition includes different levels and their corresponding number of air changes.

[0024] In one optional example, the preset grading conditions corresponding to each environmental parameter include: When the CO2 concentration reaches the first CO2 concentration range for a first preset time, the first number of air exchanges is reached. When the CO2 concentration reaches the second CO2 concentration range after a first preset time, the second number of air exchanges is reached. When the CO2 concentration remains in the third CO2 concentration range for the first preset time, the third air exchange number is reached. When the PM2.5 concentration remains within the first preset time range, corresponding to the first number of air changes; When the PM2.5 concentration remains in the first preset time until it reaches the second PM2.5 concentration range, the second number of air changes will be recorded. When the PM2.5 concentration remains in the third PM2.5 concentration range for the first preset time, it corresponds to the third air exchange rate. When the PM10 concentration remains in the first preset time range, corresponding to the first number of air changes; When the PM10 concentration remains in the first preset time until the second PM10 concentration range is reached, the second number of air changes will be corresponding to the second air exchange rate. When the PM10 concentration remains in the third PM10 concentration range for the first preset time, it corresponds to the third air exchange rate. The temperature remains at the first preset time until the temperature threshold is reached, corresponding to the third air exchange.

[0025] Specifically, the first preset time is preferably 3 minutes. The purpose of setting the first preset time is to filter out instantaneous fluctuations in environmental parameters and sensor noise, avoid false triggering due to short-term disturbances, and ensure that the corresponding air exchange rate control is only executed when the environmental parameters are continuously within the range corresponding to a certain preset grade condition. For PM2.5, a sustained concentration of 0-35 μg / m³ corresponds to 10 air exchanges per hour; 35-75 μg / m³ corresponds to 15 air exchanges per hour; and greater than 75 μg / m³ corresponds to 20 air exchanges per hour. For PM10, a sustained concentration of 0-50 μg / m³ corresponds to 10 air exchanges per hour; 50-150 μg / m³ corresponds to 15 air exchanges per hour; and greater than 150 μg / m³ corresponds to 20 air exchanges per hour. For CO2, a sustained concentration of 400-800 ppm corresponds to 10 air exchanges per hour; 800-1500 ppm corresponds to 15 air exchanges per hour; and greater than 1500 ppm corresponds to 20 air exchanges per hour. For temperature, a sustained temperature greater than 20℃ corresponds to 20 air exchanges per hour. By comparing the above data, we can determine the preset classification conditions that temperature, CO2 concentration, PM2.5 concentration and PM10 concentration each meet, and obtain the current air exchange rate corresponding to each environmental parameter.

[0026] Step S103: Take the highest number of air changes among the preset grading conditions that the environmental parameters satisfy as the target number of air changes.

[0027] In an optional example, step S103 includes: if only one preset grading condition is met, then the number of air changes corresponding to the preset grading condition is taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is the same, then the same number of air changes is taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is different, then the highest number of air changes will be taken as the target number of air changes.

[0028] Specifically, in step S102, after comparing the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration with their respective preset classification conditions, one or more preset classification conditions may be met. For different scenarios, the target air exchange rate can be determined as follows: If only one preset classification condition is met, the number of air changes corresponding to that preset classification condition will be used as the target number of air changes. For example, if only the PM2.5 concentration meets its corresponding preset classification condition, while the temperature, CO2 concentration, and PM10 concentration do not meet their respective preset classification conditions, then the number of air changes corresponding to the preset classification condition met by the PM2.5 concentration will be used as the target number of air changes.

[0029] If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is the same, then the same number of air changes is taken as the target number of air changes. For example, if PM2.5 concentration and CO2 concentration meet their respective preset grading conditions, and the number of air changes corresponding to both is 15 times / h, then 15 times / h is taken as the target number of air changes.

[0030] If two or more preset threshold conditions are met, and the number of air changes corresponding to each preset threshold condition is different, then the highest number of air changes will be taken as the target number of air changes. For example, if the PM2.5 concentration meets the corresponding preset threshold condition and the corresponding number of air changes is 15 times / h, and the CO2 concentration meets the corresponding preset threshold condition and the corresponding number of air changes is 20 times / h, then 20 times / h will be taken as the target number of air changes.

[0031] In this way, regardless of whether one or more environmental parameters in the vehicle compartment meet the preset classification conditions, a unique target air exchange rate can be determined, thus providing a clear basis for subsequent control of the operation of the fans 103 at the front and rear of the vehicle compartment. When two or more preset classification conditions are met and the air exchange rates are different, the highest air exchange rate is used as the target air exchange rate. This ensures that the ventilation intensity is executed according to the most stringent environmental requirements, avoiding the situation where the fan 103 still operates at a lower air exchange rate even though a certain environmental parameter has already met the conditions for a higher air exchange rate.

[0032] Step S104: Control the operation of the fans set at the front and rear of the vehicle compartment to make the vehicle compartment reach the target number of air exchanges.

[0033] Specifically, one or more fans 103 can be installed at the front and rear of the vehicle compartment, preferably two fans 103 at the front and rear of the vehicle compartment, respectively located at the four corners of the vehicle compartment; the fan control box 102 controls the operating status of the above-mentioned fans 103 according to the target air exchange rate determined in step S103, so that the actual ventilation volume in the vehicle compartment meets the ventilation requirements corresponding to the target air exchange rate.

[0034] In an optional example, step S104 includes: calculating the target total ventilation volume based on the target air exchange rate and the vehicle compartment volume; and controlling the operation of the fans located at the front and rear ends of the vehicle compartment based on the target total ventilation volume, so that the actual total ventilation volume of the fans reaches the target total ventilation volume. The control methods include at least one of the following: Adjust the fan speed using a frequency converter; Control the number of fans that start and stop; Adjust the opening of the damper; Control the proportion of time the fan runs per unit of time.

[0035] Specifically, the air exchange rate refers to the ratio of the vehicle compartment ventilation volume to the vehicle compartment volume per unit time, that is, the number of times the air in the vehicle compartment is completely replaced per hour. Therefore, before controlling the operation of the fan 103, the target total ventilation volume can be calculated based on the target air exchange rate and the vehicle compartment volume, that is, the target total ventilation volume is equal to the product of the target air exchange rate and the vehicle compartment volume. For example, if the target air exchange rate is 15 times / h and the vehicle compartment volume is 3000 m³, then the target total ventilation volume is 45000 m³ / h. Then, the fan control box 102 controls the operation of the fans 103 installed at the front and rear ends of the vehicle compartment according to the target total ventilation volume, so that the actual total ventilation volume of the fans 103 reaches the target total ventilation volume.

[0036] In terms of specific control methods, at least one of the following methods can be adopted: adjusting the speed of the fan 103 through a frequency converter to continuously change the air volume of the fan 103; controlling the number of fans 103 that start and stop, and combining different numbers of fans 103 to achieve the required total ventilation volume; adjusting the opening of the air valve to change the system resistance or flow area, thereby adjusting the air volume; controlling the proportion of the running time of the fan 103 per unit time, for example, making the fan 103 run at full speed for a period of time and then stop for a period of time, so that the average ventilation volume per unit time reaches the target total ventilation volume; combinations of the above methods can also be adopted. For example, when the target total ventilation volume is 45,000 m³ / h, and the rated total air volume of the four fans 103 is 60,000 m³ / h, the speed of the fans 103 can be reduced to 75% of the rated speed by the frequency converter, so that the actual total ventilation volume is reduced to about 45,000 m³ / h; or, three of the fans 103 with a rated air volume of 15,000 m³ / h can be turned on to make the total ventilation volume reach 45,000 m³ / h; or, the four fans 103 can be run at full speed for 45 minutes and then stopped for 15 minutes to make the hourly average ventilation volume reach 45,000 m³ / h.

[0037] Figure 3a and Figure 3b The diagrams show top and side views of the sensor and fan arrangement in the vehicle compartment of a roll-on / roll-off (Ro-Ro) vessel capable of transporting livestock. As seen in both figures, fans 103 are installed at both the front and rear of the vehicle compartment for mechanical ventilation and / or exhaust. Temperature, CO2, PM2.5, and PM10 sensors are installed inside the vehicle compartment to acquire the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration, respectively. Arrows in the diagrams indicate airflow direction. The front and rear fans 103 work together to create ventilation airflow within the vehicle compartment. The fan control box 102 controls the operation of the front and rear fans 103 based on the environmental parameters acquired by the sensors, ensuring the vehicle compartment achieves the target air exchange rate and continuously regulating the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration within a suitable range. Figure 3a This mainly reflects the arrangement of the fan 103 and sensors and the airflow organization within the vehicle cabin plane. Figure 3b This further reflects the relationship between the fan 103 and the sensor arrangement in the side view direction of the vehicle compartment.

[0038] This invention provides a ventilation control method for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock. By acquiring temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration within the vehicle compartment, the environmental conditions can be continuously monitored, eliminating reliance on crew experience. Each environmental parameter is compared with its corresponding preset threshold, automatically determining the air exchange rate for each parameter. When multiple environmental parameters simultaneously meet the threshold, the highest air exchange rate is used as the target air exchange rate, and the ventilation intensity is determined according to the most stringent environmental requirements, preventing the fans from operating at a low speed even when a parameter exceeds the suitable range. Controlling the operation of fans located at the front and rear of the vehicle compartment ensures the target air exchange rate is achieved, and the ventilation volume can be adjusted promptly according to changes in environmental parameters, eliminating the need for repeated manual operation by the crew. Consequently, the vehicle compartment temperature, CO2 concentration, and PM2.5 / PM10 can be continuously regulated within suitable ranges, improving environmental stability during livestock transportation, ensuring livestock survival rates, and correspondingly reducing the manual operation burden and operational risks for ship owners.

[0039] Based on the aforementioned examples, Figure 4 A flowchart illustrating another method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, provided by the present invention, is shown below. Figure 4 As shown, the method further includes: Step S401: Calculate the rate of change of each environmental parameter over time.

[0040] Specifically, the fan control box 102 can calculate the rate of change of temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration over time based on the monitoring signals periodically sent by the temperature sensor, CO2 sensor, PM2.5 sensor, and PM10 sensor, respectively. The rate of change can be represented by the amount of parameter change per unit time. For example, environmental parameters can be acquired every preset sampling period, and the ratio of the difference between two adjacent sampling values ​​to the sampling period can be calculated. Alternatively, methods such as moving averages and filtering can be used to smooth the rate of change to reduce the influence of sensor noise. By calculating the rate of change, the changing trend of environmental parameters inside the vehicle cabin can be determined, rather than relying solely on the absolute values ​​at the current moment.

[0041] Step S402: When the rate of change of any environmental parameter exceeds its corresponding preset rate threshold and continues for a second preset time, if the current value of the environmental parameter has not yet met its corresponding preset classification condition, the target air exchange rate is increased by one level.

[0042] Specifically, each environmental parameter corresponds to a preset rate threshold, which represents the upper limit of the reasonable rate of change allowed for that environmental parameter. When the rate of change of an environmental parameter exceeds its corresponding preset rate threshold, it indicates that the environmental parameter is rising rapidly. Even if its current value has not yet reached the trigger condition for a higher level, it indicates that the vehicle cabin environment may deteriorate in a short period of time. To avoid ventilation response lag, it is further determined whether the rate of change continues for a second preset time. If it continues for a second preset time, it is confirmed that the change trend is not an instantaneous fluctuation, but a real environmental change. Based on this, if the current value of the environmental parameter has not yet met its corresponding preset level condition, that is, the current value has not yet triggered a higher level of air exchange rate, the target air exchange rate is increased by one level. For example, if the current CO2 concentration is 700 ppm, corresponding to 10 air exchanges / h, it has not yet reached the 15 air exchanges / h level corresponding to 800-1500 ppm, but the rate of change of CO2 concentration exceeds the preset rate threshold and continues for a second preset time, the target air exchange rate is increased from 10 air exchanges / h to 15 air exchanges / h in advance. As a result, ventilation control has changed from "current value triggering" to "trend prediction triggering", enabling it to respond in advance before environmental parameters actually exceed the standard.

[0043] And / or, in step S403, when the rate of change of any environmental parameter is negative and its absolute value exceeds its corresponding preset rate threshold, the target air exchange rate is reduced by one level.

[0044] Specifically, if the rate of change of a certain environmental parameter is negative, it indicates that the environmental parameter is decreasing; if its absolute value exceeds the corresponding preset rate threshold, it indicates that the environmental parameter is rapidly improving. At this point, the vehicle cabin environment no longer needs to maintain a high ventilation intensity. While ensuring that the environmental parameters remain within a suitable range, the target air exchange rate can be reduced by one level to reduce the energy consumption of the fan 103. For example, if the CO2 concentration rapidly decreases from above 1500 ppm to below 800 ppm, and the rate of change is negative and the absolute value exceeds the preset rate threshold, the target air exchange rate can be reduced from 20 times / h to 15 times / h. Through this method, ventilation control can not only increase the air exchange rate in advance when the environment deteriorates, but also reduce the air exchange rate in a timely manner when the environment improves, achieving on-demand ventilation and energy-saving operation.

[0045] Building upon the aforementioned example, by calculating the rate of change of each environmental parameter over time, and increasing the target air exchange rate in advance when the rate of change exceeds a preset rate threshold, or decreasing the target air exchange rate when the rate of change is negative and its absolute value exceeds a preset rate threshold, ventilation control can be transformed from a passive response to an active prediction, avoiding the lag problem of ventilation only starting after environmental parameters exceed the standard. At the same time, timely downgrading when the environment improves helps reduce fan energy consumption, extend equipment lifespan, and more stably maintain vehicle cabin temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration within a suitable range, which is beneficial for improving environmental stability and survival rate during livestock transportation.

[0046] Based on the aforementioned examples, Figure 5 A flowchart illustrating another method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, provided by the present invention, is shown below. Figure 5 As shown, the method further includes: Step S501: Obtain the historical navigation data of the roll-on / roll-off ship under the corresponding transportation conditions. The transportation conditions include at least one of route, season, livestock type and loading status. The historical navigation data includes historical temperature, historical CO2 concentration, historical PM2.5 concentration, historical PM10 concentration, historical wind turbine operating status and historical livestock survival rate.

[0047] Specifically, the environmental parameters inside the vehicle compartment, the operating status of the fan, and the livestock survival rate obtained after the voyage can be recorded and stored by the fan control box 102, the ship monitoring system, or the shore-based management platform during past voyages of the roll-on / roll-off ship under different transportation conditions. Transportation conditions can include at least one of the following: route, season, livestock type, and loading condition. For example, historical data for different routes, seasons, livestock types, or loading conditions can be recorded and stored separately. Historical temperature, historical CO2 concentration, historical PM2.5 concentration, and historical PM10 concentration can reflect the actual changes in the environmental parameters inside the vehicle compartment; historical fan operating status can reflect the number of air exchanges, operating time, number of starts and stops, or frequency conversion of the fan 103 under different environmental conditions; historical livestock survival rate can reflect the relationship between the ventilation control effect and the livestock transportation result. The above historical voyage data can be classified and stored according to transportation conditions for subsequent retrieval and use under corresponding transportation conditions.

[0048] Step S502: Adjust the preset grading conditions according to the historical navigation data to obtain preset grading conditions corresponding to the corresponding transportation conditions.

[0049] Specifically, historical navigation data can be analyzed to identify the correlation between changes in environmental parameters, fan operating status, and livestock survival rates. Based on this, preset grading conditions can be adjusted to make the ventilation control strategy more adaptable to the actual environmental characteristics and livestock transportation needs of the corresponding route. For example, if historical data for a route shows that in a certain season or segment, the CO2 concentration in the vehicle compartment frequently exceeds the range corresponding to a higher grading level, while the livestock survival rate decreases, the boundaries of the CO2 concentration range can be appropriately tightened or the air exchange rate corresponding to the corresponding grading level can be increased. If historical data for a route shows that environmental parameters are consistently at a low level and the livestock survival rate is high, the corresponding grading conditions can be appropriately relaxed or the air exchange rate can be reduced to decrease the energy consumption of the fan 103.

[0050] In an optional example, step S502 includes: adjusting at least one of the following preset grading conditions according to the historical navigation data for different transportation conditions: the number of air changes corresponding to each grading, the interval boundary or threshold of each grading.

[0051] When optimizing preset grading conditions based on historical navigation data, adjustments can be made for different transportation conditions. Specifically, adjusting the air exchange rate corresponding to each grading can involve increasing or decreasing the original air exchange rate for each grading under different transportation conditions. For example, adjusting the second air exchange rate from 15 times / h to 16 times / h or 14 times / h. Adjusting the interval boundaries or thresholds of each grading can involve changing the upper and lower limits of each concentration interval under different transportation conditions. For example, adjusting the upper limit of the second concentration interval of PM2.5 from 75 μg / m³ to 70 μg / m³ or 80 μg / m³, or adjusting the upper limit of the second concentration interval of CO2 from 1500 ppm to 1400 ppm or 1600 ppm. Adjusting the temperature threshold can involve changing the specific values ​​of the first, second, or third temperature thresholds under different transportation conditions. By making the above adjustments for different transportation conditions, the preset grading conditions can be made more in line with the actual operating conditions of different routes, seasons, livestock types and loading conditions, so as to ensure that the vehicle cabin environment is suitable and the livestock survival rate is high, while taking into account ventilation energy consumption and operating economy.

[0052] Step S503: Apply the preset grading conditions corresponding to the corresponding transportation conditions to ventilation control under the same or similar transportation conditions in the future.

[0053] Specifically, after obtaining the preset grading conditions corresponding to the corresponding transportation conditions in step S502, the preset grading conditions can be associated and stored with the corresponding transportation conditions. When subsequent voyages encounter the same or similar transportation conditions, the preset grading conditions corresponding to those transportation conditions are directly invoked and processed according to... Figure 2 The example shown demonstrates ventilation control.

[0054] The "same or similar transportation conditions" refer to at least one of the following: same route or similar climate, same or similar season, same or similar livestock type, or same or similar loading conditions. For example, if a voyage is for transporting cattle in the summer and is fully loaded, then when a subsequent voyage is for transporting cattle in the summer and is fully loaded, the previously revised preset grading conditions can be directly applied; if a subsequent voyage is for transporting cattle in the summer but the loading is slightly different, it can also be considered as similar transportation conditions, and the same or similar preset grading conditions can be applied.

[0055] Building upon the aforementioned example, by acquiring historical navigation data under corresponding transportation conditions—including at least one of route, season, livestock type, and loading status—and by adjusting the air exchange rate, interval boundaries, or thresholds of each preset tier based on the historical navigation data for different transportation conditions, preset tier conditions corresponding to the respective transportation conditions can be obtained. Furthermore, these preset tier conditions can be used for ventilation control under subsequent identical or similar transportation conditions, enabling the ventilation control strategy to adapt to the actual environmental characteristics and livestock transportation needs under different transportation conditions, rather than being limited to fixed preset conditions.

[0056] As a result, the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration in the vehicle compartment can be more precisely controlled within a suitable range, which is conducive to further improving the survival rate of livestock during transportation. At the same time, when environmental conditions permit, the number of ventilations can be appropriately reduced, reducing fan energy consumption, extending fan life, and reducing crew intervention, thereby improving the overall operational efficiency of ro-ro ships transporting livestock.

[0057] Secondly, an example of the present invention provides a ventilation control device for the cargo compartment of a roll-on / roll-off ship capable of transporting livestock. Figure 6 This is a schematic diagram of the structure of a ventilation control device for the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, provided by the present invention. like Figure 6 As shown, the ventilation control device for the cargo hold of the roll-on / roll-off ship capable of transporting livestock includes: The environmental parameter acquisition module 601 is used to acquire environmental parameters inside the vehicle compartment, including temperature, CO2 concentration, PM2.5 concentration and PM10 concentration. The grading condition comparison module 602 is used to compare the environmental parameters with their respective preset grading conditions, wherein the preset grading conditions are the correspondence between the corresponding environmental parameters and the number of air changes. The target air change rate determination module 603 is used to take the highest air change rate among the air change rates corresponding to the preset grading conditions satisfied by the environmental parameters as the target air change rate. The fan control module 604 is used to control the operation of the fans installed at the front and rear ends of the vehicle compartment, so that the vehicle compartment can achieve the target number of air changes.

[0058] In one optional example, the preset grading conditions corresponding to each environmental parameter include: When the CO2 concentration reaches the first CO2 concentration range for a first preset time, the first number of air exchanges is reached. When the CO2 concentration reaches the second CO2 concentration range after a first preset time, the second number of air exchanges is reached. When the CO2 concentration remains in the third CO2 concentration range for the first preset time, the third air exchange number is reached. When the PM2.5 concentration remains within the first preset time range, corresponding to the first number of air changes; When the PM2.5 concentration remains in the first preset time until it reaches the second PM2.5 concentration range, the second number of air changes will be recorded. When the PM2.5 concentration remains in the third PM2.5 concentration range for the first preset time, it corresponds to the third air exchange rate. When the PM10 concentration remains in the first preset time range, corresponding to the first number of air changes; When the PM10 concentration remains in the first preset time until the second PM10 concentration range is reached, the second number of air changes will be corresponding to the second air exchange rate. When the PM10 concentration remains in the third PM10 concentration range for the first preset time, it corresponds to the third air exchange rate. The temperature remains at the first preset time until the first temperature threshold is reached, corresponding to the third air exchange.

[0059] In an optional example, the target air exchange rate determination module 603 is specifically used for: If only one preset grading condition is met, the number of air changes corresponding to that preset grading condition shall be taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is the same, then the same number of air changes is taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is different, then the highest number of air changes will be taken as the target number of air changes.

[0060] In an optional example, a rate of change prediction module 605 is also included for: Calculate the rate of change of each environmental parameter over time; When the rate of change of any environmental parameter exceeds its corresponding preset rate threshold and continues for a second preset time, if the current value of the environmental parameter has not yet met its corresponding preset classification condition, the target air exchange rate will be increased by one level. And / or, when the rate of change of any environmental parameter is negative and its absolute value exceeds its corresponding preset rate threshold, the target air exchange rate is reduced by one level.

[0061] In an optional example, a historical data optimization module 606 is also included, for: The historical navigation data of the roll-on / roll-off ship under the corresponding transportation conditions are obtained. The transportation conditions include at least one of route, season, livestock type and loading status. The historical navigation data includes historical temperature, historical CO2 concentration, historical PM2.5 concentration, historical PM10 concentration, historical wind turbine operating status and historical livestock survival rate. Based on the historical navigation data, the preset grading conditions are adjusted to obtain preset grading conditions corresponding to the corresponding transportation conditions.

[0062] In one optional example, adjusting the preset grading conditions based on the historical navigation data to obtain preset grading conditions corresponding to the corresponding transportation conditions includes: Based on the historical navigation data, adjust at least one of the following preset grading conditions for different transportation conditions: the number of air changes corresponding to each grading, the interval boundary or threshold of each grading.

[0063] In one alternative example, the wind turbine control module 604 is specifically used for: Calculate the target total ventilation volume based on the target air exchange rate and vehicle compartment volume; Based on the target total ventilation volume, control the operation of the fans installed at the front and rear of the vehicle compartment so that the actual total ventilation volume of the fans reaches the target total ventilation volume; The control methods include at least one of the following: Adjust the fan speed using a frequency converter; Control the number of fans that start and stop; Adjust the opening of the damper; Control the proportion of time the fan runs per unit of time.

[0064] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process and corresponding beneficial effects of the above-described method for controlling the ventilation of the cargo compartment of a roll-on / roll-off ship capable of transporting livestock can be referred to the corresponding process in the aforementioned method example, and will not be repeated here.

[0065] Thirdly, the present invention provides an example of a fan control box. For example... Figure 7As shown, this invention provides a wind turbine control box, including a processor 701, a communication interface 702, a memory 703, and a communication bus 704. The processor 701, communication interface 702, and memory 703 communicate with each other via the communication bus 704. Memory 703 is used to store computer programs; In one example of the present invention, when the processor 701 executes the program stored in the memory 703, it implements the steps of the ventilation control method for the cargo compartment of a roll-on / roll-off ship capable of transporting livestock provided in any of the aforementioned method examples.

[0066] The electronic device provided in this embodiment of the invention has a similar implementation principle and technical effect to the above embodiments, and will not be described again here.

[0067] The aforementioned memory 703 can be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 703 has storage space for program code used to perform any of the method steps described above. For example, the storage space for program code may include individual program codes for implementing the various steps in the methods described above. This program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, optical discs (CDs), memory cards, or floppy disks. Such computer program products are typically portable or fixed storage units. The storage unit may have storage segments or storage spaces arranged similarly to memory 703 in the aforementioned electronic device. The program code may be compressed, for example, in a suitable form. Typically, the storage unit includes programs for performing the method steps according to embodiments of the invention, i.e., code that can be read by a processor such as 701, which, when run by the electronic device, causes the electronic device to perform the various steps in the methods described above.

[0068] Embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the ventilation control method for the cargo compartment of a roll-on / roll-off ship capable of transporting livestock as described above.

[0069] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus. The computer-readable storage medium carries one or more programs that, when executed, implement the method according to the embodiments of the present invention.

[0070] Fourthly, this invention provides an example of a ventilation control system for the cargo compartment of a roll-on / roll-off ship capable of transporting livestock. (See reference...) Figure 1 As shown, the control system includes a sensor assembly 101, a fan control box 102 as described in the third aspect, and a fan 103 disposed at the front and rear ends of the vehicle compartment. The sensor assembly 101 includes a temperature sensor, a CO2 sensor, a PM2.5 sensor, and a PM10 sensor, which are used to acquire the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration inside the vehicle cabin, respectively. The fan control box 102 is connected to the sensor assembly 101 and the fan 103 respectively, and is used to control the operation of the fan 103 according to the environmental parameters obtained by the sensor assembly 101, so that the vehicle cabin reaches the target air exchange rate.

[0071] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process and corresponding beneficial effects of the ventilation control system for the cargo compartment of a roll-on / roll-off ship capable of transporting livestock described above can be referred to the corresponding process in the aforementioned method example, and will not be repeated here.

[0072] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these examples will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other examples without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the examples shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling ventilation in the vehicle compartment of a roll-on / roll-off ship capable of transporting livestock, characterized in that, include: The environmental parameters inside the vehicle cabin are obtained, including temperature, CO2 concentration, PM2.5 concentration and PM10 concentration. The environmental parameters are compared with their respective preset grading conditions, which are the correspondence between the corresponding environmental parameters and the number of air changes. The highest number of air changes among the preset grading conditions satisfied by the environmental parameters is taken as the target number of air changes. Control the operation of the fans located at the front and rear of the vehicle compartment to achieve the target number of air changes in the vehicle compartment.

2. The method according to claim 1, characterized in that, The preset grading conditions corresponding to each environmental parameter include: When the CO2 concentration reaches the first CO2 concentration range for a first preset time, the first number of air exchanges is reached. When the CO2 concentration reaches the second CO2 concentration range after a first preset time, the second number of air exchanges is reached. When the CO2 concentration remains in the third CO2 concentration range for the first preset time, the third air exchange number is reached. When the PM2.5 concentration remains within the first preset time range, corresponding to the first number of air changes; When the PM2.5 concentration remains in the first preset time until it reaches the second PM2.5 concentration range, the second number of air changes will be recorded. When the PM2.5 concentration remains in the third PM2.5 concentration range for the first preset time, it corresponds to the third air exchange rate. When the PM10 concentration remains in the first preset time range, corresponding to the first number of air changes; When the PM10 concentration remains in the first preset time until the second PM10 concentration range is reached, the second number of air changes will be corresponding to the second air exchange rate. When the PM10 concentration remains in the third PM10 concentration range for the first preset time, it corresponds to the third air exchange rate. The temperature remains at the first preset time until the temperature threshold is reached, corresponding to the third air exchange.

3. The method according to claim 1, characterized in that, The step of taking the highest air change rate among the air change rates corresponding to the preset grading conditions satisfied by the environmental parameters as the target air change rate includes: If only one preset grading condition is met, the number of air changes corresponding to that preset grading condition shall be taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is the same, then the same number of air changes is taken as the target number of air changes. If two or more preset grading conditions are met, and the number of air changes corresponding to each preset grading condition is different, then the highest number of air changes will be taken as the target number of air changes.

4. The method according to claim 2, characterized in that, The method further includes: Calculate the rate of change of each environmental parameter over time; When the rate of change of any environmental parameter exceeds its corresponding preset rate threshold and continues for a second preset time, if the current value of the environmental parameter has not yet met its corresponding preset classification condition, the target air exchange rate will be increased by one level. And / or, when the rate of change of any environmental parameter is negative and its absolute value exceeds its corresponding preset rate threshold, the target air exchange rate is reduced by one level.

5. The method according to claim 1, characterized in that, The method further includes: The historical navigation data of the roll-on / roll-off ship under the corresponding transportation conditions are obtained. The transportation conditions include at least one of route, season, livestock type and loading status. The historical navigation data includes historical temperature, historical CO2 concentration, historical PM2.5 concentration, historical PM10 concentration, historical wind turbine operating status and historical livestock survival rate. Based on the historical navigation data, the preset grading conditions are adjusted to obtain preset grading conditions corresponding to the corresponding transportation conditions; The preset grading conditions corresponding to the corresponding transportation conditions are used for ventilation control under the same or similar transportation conditions in the future.

6. The method according to claim 5, characterized in that, The step of adjusting the preset grading conditions based on the historical navigation data to obtain preset grading conditions corresponding to the corresponding transportation conditions includes: Based on the historical navigation data, adjust at least one of the following preset grading conditions for different transportation conditions: the number of air changes corresponding to each grading, the interval boundary or threshold of each grading.

7. The method according to claim 1, characterized in that, The control system is set at the front and rear of the vehicle compartment to operate the fans, enabling the vehicle compartment to achieve the target air exchange rate, including: Calculate the target total ventilation volume based on the target air exchange rate and vehicle compartment volume; Based on the target total ventilation volume, control the operation of the fans installed at the front and rear of the vehicle compartment so that the actual total ventilation volume of the fans reaches the target total ventilation volume; The control methods include at least one of the following: Adjust the fan speed using a frequency converter; Control the number of fans that start and stop; Adjust the opening of the damper; Control the proportion of time the fan runs per unit of time.

8. A ventilation control device for the cargo hold of a roll-on / roll-off ship capable of transporting livestock, characterized in that, include: An environmental parameter acquisition module is used to acquire environmental parameters inside the vehicle cabin, including temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration. The grading condition comparison module is used to compare the environmental parameters with their respective preset grading conditions, wherein the preset grading conditions are the correspondence between the corresponding environmental parameters and the number of air changes. The target air change rate determination module is used to take the highest air change rate among the air change rates corresponding to the preset grading conditions satisfied by the environmental parameters as the target air change rate. The fan control module is used to control the operation of the fans installed at the front and rear of the vehicle compartment, so that the vehicle compartment can achieve the target number of air changes.

9. A fan control box, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in memory, it implements the steps of the method for controlling ventilation in the cargo compartment of a roll-on / roll-off ship capable of transporting livestock as described in any one of claims 1-7.

10. A ventilation control system for the cargo hold of a roll-on / roll-off ship capable of transporting livestock, characterized in that, Includes sensor components, a fan control box as described in claim 9, and fans located at the front and rear ends of the vehicle compartment; The sensor assembly includes a temperature sensor, a CO2 sensor, a PM2.5 sensor, and a PM10 sensor, which are used to acquire the temperature, CO2 concentration, PM2.5 concentration, and PM10 concentration inside the vehicle cabin, respectively. The fan control box is connected to the sensor assembly and the fan respectively, and is used to control the operation of the fan according to the environmental parameters obtained by the sensor assembly, so that the vehicle compartment can reach the target air exchange rate.

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