Method and system for controlling air humidity in test box

Abstract

The invention provides a method and a system for controlling air humidity in a test box. The method comprises the following steps: determining water vapor flow required in a test box to be treated according to a target humidity parameter and dry air flow; the heating capacity of a preheater is adjusted, and water to be used entering a humidifying water tank is preheated based on the water inlet temperature and the outlet temperature of the preheater, so that the temperature of the water to be used reaches a first specified temperature; based on the water level line in the humidifying water tank, the water amount in the humidifying water tank is controlled; and on the basis of a feedforward compensation strategy, the thermal power of the electric heating pipe is adjusted, so that water in the humidifying water tank generates water vapor, and the generated water vapor is mixed into dry air in the air inlet pipe so as to carry out continuous humidifying treatment on the to-be-treated test box. According to the invention, the water vapor and the dry air to be humidified are directly mixed, so that a more effective and more accurate humidification treatment process in a supergravity environment is realized.

Description

Technical Field

[0001] This application relates to the field of environmental simulation testing technology, and more specifically, to a method and system for controlling air humidity inside a test chamber. Background Technology

[0002] In geotechnical centrifuge environmental tests, high-precision control of environmental humidity is required to study the geomechanical properties of mountains, roadbed slopes, etc.

[0003] Existing humidification methods mainly include spray humidification and steam humidification. However, in hypergravity environments, spray humidification is limited in its applicability due to the difficulty in suspending droplets and the significantly shortened evaporation time window. While conventional steam humidification technology can be applied, it mainly relies on feedback control from humidity sensors, which has drawbacks such as significant response lag, long control loop time, and slow steady-state establishment, making it difficult to meet the dynamic adjustment requirements of experiments.

[0004] Environmental simulation in test chambers often requires quantitative humidification of dry air at the air inlet to achieve set temperature and humidity conditions. Existing humidification solutions typically use large-capacity water tanks to ensure continuous operation. However, under hypergravity conditions, large-capacity tanks generate significant hydrostatic pressure, causing the boiling point of water to rise and change with water level, posing a challenge to the continuous humidification steam. Furthermore, hypergravity environments affect the behavior of liquid water, further increasing the difficulty of humidity control. Existing control methods often rely on direct detection of humidity within the test chamber, resulting in detection lag and hindering rapid and dynamic humidity control.

[0005] Therefore, it is necessary to provide a method or system for controlling the air humidity inside a test chamber to solve one of the aforementioned technical problems. Summary of the Invention

[0006] The purpose of this application is to provide a method, system, medium, and electronic device for controlling air humidity inside a test chamber, which can solve at least one of the aforementioned technical problems. The specific solution is as follows:

[0007] According to a specific embodiment of this application, this application provides a method for controlling air humidity inside a test chamber, comprising: determining the required water vapor flow rate inside the test chamber to be treated based on target humidity parameters and dry air flow rate; preheating the water to be used in the humidification water tank by adjusting the heating capacity of the preheater and based on the inlet and outlet temperatures of the preheater, so that the temperature of the water to be used reaches a first specified temperature, wherein the water to be used is used to replenish water inside the humidification water tank; controlling the amount of water inside the humidification water tank based on the water level line inside the humidification water tank; and adjusting the heat power of the electric heating tube based on a feedforward compensation strategy so that the water in the humidification water tank generates water vapor, and the generated water vapor is mixed into the dry air in the air inlet duct for continuous humidification treatment of the test chamber to be treated, wherein the method includes pre-cooling compensation treatment of the dry air in the air inlet duct in advance.

[0008] According to a specific embodiment of this application, this application also provides an air humidity control system for a test chamber, which executes the air humidity control method for a test chamber described in this application. The air humidity control system for a test chamber includes: a test chamber to be treated, which is connected to an air inlet pipe for delivering dry air to the test chamber; a humidifying water tank connected to a water supply pipe, wherein an electric heating element is provided at the bottom of the humidifying water tank for holding water to replenish the test chamber, and the heating power of the electric heating element is controlled so that the water to be used in the humidifying water tank generates water vapor, which is mixed into the dry air in the air inlet pipe for continuous humidification treatment of the test chamber; and a water supply pipe for supplying water to the test chamber, wherein a preheater is provided on the water supply pipe, which is located upstream of the humidifying water tank and is used to preheat the water to be used.

[0009] According to a specific embodiment of this application, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the air humidity control method in the test chamber as described in any of the preceding claims.

[0010] According to a specific embodiment of this application, this application also provides an electronic device, including: one or more processors; and a storage system for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement the air humidity control method in the test chamber as described in any of the preceding claims.

[0011] Compared with the prior art, the above-described solutions of this application have at least the following beneficial effects:

[0012] This application adopts a method of directly controlling the heating power of the electric heating tube, which effectively determines the water vapor for humidity adjustment and precisely controls the steam flow rate. The generated water vapor is directly mixed with the dry air to be humidified and then introduced into the test chamber. This achieves more effective humidity adjustment under hypergravity environment, avoids the lag problem of conventional humidity detection feedback methods, and thus realizes rapid and dynamic control of the humidity in the test chamber. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0014] Figure 1 This is a flowchart of the air humidity control method inside the test chamber according to an embodiment of this application;

[0015] Figure 2 A flowchart of an application system for using the test chamber air humidity control method according to embodiments of this application;

[0016] Figure 3 This is a structural diagram of the air humidity control system inside the test chamber according to an embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the electronic device structure shown in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0020] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0021] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0022] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0023] This application provides a method for controlling air humidity inside a test chamber. The method determines the required water vapor flow rate inside the test chamber based on target humidity parameters and dry air flow rate. It adjusts the heating capacity of the preheater and preheats the water entering the humidification tank based on the inlet and outlet temperatures of the preheater, bringing the water to a first specified temperature. This water is used to replenish the humidification tank. The method controls the water volume inside the humidification tank based on the water level. Using a feedforward compensation strategy, it adjusts the heating power of the electric heating element to generate water vapor from the water in the humidification tank. This water vapor mixes with the dry air in the air inlet duct to continuously humidify the test chamber. Specifically, this is achieved through various treatments, including pre-cooling compensation treatment of the dry air in the air inlet duct, effectively enabling continuous humidification of the test chamber.

[0024] It should be noted that the air humidity control method in the test chamber of this application has a wide range of applications, and is particularly suitable for high-precision and rapid dynamic control of air humidity in test chambers under ultra-gravity environments such as geotextile centrifuges.

[0025] The following is in conjunction with the appendix Figure 1 and Figure 2 Detailed description of optional embodiments of the method of this application.

[0026] Figure 1 This is a flowchart of a method for controlling air humidity inside a test chamber according to an embodiment of this application. Figure 2This is a schematic diagram of an application system for using the air humidity control method in a test chamber according to an embodiment of this application.

[0027] like Figure 1 As shown, in step S101, the required water vapor flow rate in the test chamber to be treated is determined based on the target humidity parameter and the dry air flow rate.

[0028] Specifically, based on the required humidification amount under different humid and hot conditions, and according to the maximum air flow rate, maximum air moisture content, air density, and water vapor density, the water vapor mass flow rate and water vapor volume flow rate are calculated to determine the required water vapor flow rate inside the test chamber to be treated. The test chamber to be treated is a non-vacuum sealed test chamber, which is a test chamber where gas can flow.

[0029] Optionally, the test chamber to be treated can be humidified by directly introducing the generated water vapor into the dry air.

[0030] In one specific embodiment, the method for controlling the air humidity inside the test chamber of this application is specifically described for the application scenario of controlling the air humidity inside the test chamber (i.e., the test chamber to be treated) under ultra-gravity environment such as a geotextile centrifuge.

[0031] Specifically, the test chamber to be treated includes continuous operation for a specified period of time under hypergravity conditions.

[0032] For example, under 100g hypergravity conditions, a range of adjustable steam volume can be continuously and stably supplied to dry air to meet the target humidity parameters, target temperature range and other technical indicators, and can be operated continuously for at least 96 hours.

[0033] It should be noted that in this example, the supergravity is 100g, but it can also be greater than 100g. In other embodiments, it can be determined according to whether the equipment used can withstand it. The above is only an optional example and should not be construed as a limitation of the present invention.

[0034] The target humidity parameters include the target humidity range (e.g., 10%RH to 95%RH) and the humidity deviation (e.g., ±2.5%).

[0035] The relevant parameters are calculated based on the target humidity range, target temperature range, and the set humid air conditions.

[0036] Specifically, the total pressure of moist air is the ambient pressure (at normal pressure, i.e., P). 常压 =101.325 kPa).

[0037] The humid air is calculated in two parts: dry air and water vapor, both of which have the same temperature.

[0038] The partial pressure of saturated water vapor is determined by temperature. The following expression is used to calculate the partial pressure of saturated water vapor in the test chamber to be treated:

[0039]

[0040] Among them, P vs t represents the partial pressure of saturated water vapor inside the test chamber. 目标 The set target humid air temperature is the control target humid air temperature inside the test chamber to be treated.

[0041] The following expression represents the moisture content of the air inside the test chamber to be treated.

[0042]

[0043] Where d represents the moisture content in the air inside the test chamber to be treated; P represents the relative humidity of the air inside the test chamber. vs P represents the partial pressure of saturated water vapor inside the test chamber. 常压 This indicates the ambient pressure inside the test chamber to be treated.

[0044] The specific enthalpy of the humid air inside the test chamber is calculated using the following expression.

[0045] h = 1.01t 目标 +(2501+1.85t 目标 )d

[0046] Where h represents the specific enthalpy of the humid air inside the test chamber; t 目标 The value represents the set target humid air temperature, i.e., the control target humid air temperature inside the test chamber; d represents the moisture content in the air inside the test chamber; 1.01 is the specific heat of dry air at constant pressure, 2501 is the latent heat of water vapor, and 1.85 is the specific heat of water vapor at constant pressure. The dew point temperature is calculated by inversely using the formula for the partial pressure of saturated water vapor.

[0047] Furthermore, the wet air parameters for the four extreme operating conditions were calculated, as detailed in Table 1 below.

[0048] Table 1

[0049] dry and cold damp and cold dry heat humid heat Temperature ℃ -20 -20 30 30 relative humidity % 10 95 10 95 Moisture content (g / kg) 0.0761 0.724 2.63 25.89 Enthalpy of moist air (kJ / kg) -20.01 -18.42 37.02 96.48 Dew point temperature (°C) -43.48 -20.59 -4.86 29.11

[0050] Table 1 is an example table showing the humid air parameters for four extreme operating conditions. The calculated moisture content is the weight of water vapor per kilogram of dry air, equivalent to a concentration unit. In fact, the four extreme operating conditions are four control targets. The air supplied upstream is dry air, and the device of this application supplements the dry air with a specified amount of water vapor according to the moisture content required for the specific experimental conditions.

[0051] In practice, the operating conditions within the test chamber vary depending on the specific test requirements for each experiment. The operating conditions in this example represent any specific condition among the four extreme conditions, and the target condition changes over time. Specifically, it refers to a time-varying point within the temperature range of -20℃ to 30℃ and humidity range of 10%RH to 95%RH. Therefore, the required steam flow rate needs to be determined based on the target operating conditions at each moment.

[0052] Next, the humidification amount inside the test chamber to be treated is calculated.

[0053] The humidification amount inside the test chamber is calculated based on parameters such as the moisture content and air flow rate in the air inside the test chamber.

[0054] It should be noted that in this application, the moisture content refers to the weight of water vapor per kilogram of dry air. The weight of water vapor required to be added per unit time is obtained by multiplying the weight of dry air entering the test chamber per unit time by the moisture content. If the humidity is too high, less water vapor should be added. Because the incoming air is almost devoid of moisture (very low dew point), the amount of humidifier to be added needs to be adjusted in real time according to the actual test conditions.

[0055] Specifically, the gas supplied by the gas source undergoes drying and temperature regulation to reach a very dry state, estimated as having zero moisture content. The moisture content corresponding to the target operating condition within the test chamber represents the weight of water vapor per kilogram of dry air under that condition. Given the air flow rate supplied by the gas source, i.e., the weight of dry air entering per second, multiplying it by the moisture content yields the weight of water vapor required to be replenished per second, i.e., the required water vapor flow rate.

[0056] It should be noted that, in this application, to accommodate the temperature regulation requirements under a 100g hypergravity environment, a continuous humidification method is used at the air inlet to achieve humidity control. The air humidity parameters are calculated in real time based on the temperature and humidity of the target operating conditions at different times, and the humidification tank is controlled to provide a corresponding flow rate of water vapor. Calculations are performed for four extreme conditions: dry heat, humid heat, dry cold, and humid cold. The humid heat condition has the highest humidity content, while the dry cold condition has the lowest. The difference between the maximum and minimum values ​​is significant, requiring the steam flow rate to be adjustable over a wide range. To achieve continuous humidification, a large-capacity water tank is required. However, due to the high water level, a large-capacity tank will generate significant pressure under hypergravity, resulting in a very high boiling point that changes with the water level. To avoid this problem, a smaller-capacity water tank (i.e., a humidification water tank) is used to minimize the impact of hypergravity on the boiling point. To ensure stable humidification steam output, while precisely controlling the water supply, preheating the water is implemented to ensure that the supply water temperature matches the boiling point in the tank, preventing changes in the water temperature and thus affecting the steam generation rate. Furthermore, heat leakage prevention measures are employed to ensure that all heating power is used to provide the heat required for water evaporation, effectively reducing errors in steam generation and energy consumption. The above is only an optional example and should not be construed as a limitation of this application.

[0057] Next, in step S102, the heating capacity of the preheater is adjusted, and the water to be used in the humidification tank is preheated based on the inlet and outlet temperatures of the preheater. The preheated water to be used is then transported into the humidification tank to replenish water to the humidification tank.

[0058] Steam is generated by electric heating. The heating amount of the preheater is adjusted by regulating the heating power of the preheater. The water to be used in the humidification tank is preheated based on the inlet and outlet temperatures of the preheater, so as to further regulate the range of water vapor generation.

[0059] exist Figure 2 In the example of the application system, the preheater 4 is placed below the humidification water tank 5, that is, the preheater 4 is placed below the humidification water tank 5, so that the positional difference between the preheater 4 and the humidification water tank 5 forms a supergravity pressure difference.

[0060] Specifically, the positional difference between the preheater and the humidification tank creates a super-gravity pressure difference (e.g., a pressure difference of about 0.2 MPa), which pressurizes the preheater 4, increasing its internal pressure and thus its boiling point. This prevents the preheater 4 from boiling and generating gas, allowing it to heat the water to the first specified temperature while maintaining a liquid state without boiling. This avoids the generation of steam bubbles during preheating, effectively ensuring a uniform and stable temperature for the water to be used, and preventing unnecessary air resistance or flow instability before entering the humidification tank. Consequently, the temperature inside the humidification tank is effectively controlled.

[0061] More specifically, the preheater is controlled to preheat the water to be used to a first specified temperature at a specific time. Optionally, the first specified temperature is the boiling point of the water in the humidification tank.

[0062] It should be noted that under hypergravity, the boiling point of water ranges from a lower boiling point at the liquid surface (depending on surface pressure) to a higher boiling point deep within the liquid due to a significant increase in hydrostatic pressure. Because this application employs a small-capacity humidification tank with continuous water replenishment and water level control measures, it effectively ensures the water level remains stable at the set position. By placing the heater near the liquid surface, boiling is effectively ensured to occur at the surface. The actual boiling temperature within the tank depends on the gas pressure at the liquid surface. Relative to ambient pressure, the vapor flow resistance is negligible. Therefore, it can be assumed that the gas pressure at the liquid surface of the humidification tank is consistent with the ambient pressure in the test chamber. At atmospheric pressure, the boiling temperature is 100°C; at low pressure, the boiling temperature is below 100°C; and at high pressure, the boiling temperature is above 100°C.

[0063] In this example, boiling occurs near the water surface in the atmospheric pressure tank, hence it is atmospheric pressure boiling, with a boiling point of 100°C. The water temperature in the preheating chamber needs to be controlled to the same boiling point as the heating chamber, also at 100°C. Under hypergravity conditions, the pressure inside the preheating chamber will be higher, causing the boiling point to exceed 100°C, thus preventing boiling.

[0064] Optionally, a second temperature sensor and a third temperature sensor are provided on both the upstream and downstream sides (i.e., the left and right sides) of the preheater 4. The third temperature sensor is used to preheat the water inside the humidification tank to near boiling point, thereby reducing the waiting time during humidification.

[0065] It should be noted that the above is only an optional example and should not be construed as a limitation of this application.

[0066] Next, in step S103, the amount of water inside the humidifying water tank is controlled based on the water level line inside the humidifying water tank.

[0067] Specifically, the humidifying water tank is an atmospheric pressure container that holds a certain amount of water. It is electrically heated to boil the water and generate steam. Insulation measures are in place to prevent heat leakage. A first temperature sensor is installed inside the humidifying water tank to monitor the water temperature. An electric heating element is located near the liquid surface of the water in the humidifying water tank. This heating element provides the heat required for the water in the humidifying water tank to boil and generate steam.

[0068] A level gauge is also installed on one side of the humidification water tank to monitor the water level. The level gauge monitors the water level inside the humidification water tank and, in conjunction with the water supply valve, controls the water level to be maintained at the designated level. Specifically, when the water level in the humidification water tank falls below the designated level, the water supply valve is opened and, for a specific period, supplies preheated water to the humidification water tank to maintain the water level. This effectively controls the amount of water inside the humidification water tank.

[0069] Optionally, the humidifying water tank also includes water level lines for indicating the highest water level, the rated water level, and the lowest water level, and issues an alarm signal when the water level inside the humidifying water tank is lower than the lowest water level or higher than the highest water level.

[0070] It should be noted that the above is only an optional example and should not be construed as a limitation of this application.

[0071] Next, in step S104, the heat power of the electric heating tube is adjusted so that the water in the humidification tank generates the required amount of water vapor, and the generated water vapor is mixed into the dry air in the air inlet pipe to continuously humidify the test chamber to be treated. This includes pre-cooling compensation treatment of the dry air in the air inlet pipe in advance based on a feedforward compensation strategy.

[0072] Specifically, based on the aforementioned steam flow rate, the required electric heating power is calculated, and the heat power of the electric heating tube is adjusted according to the calculated electric heating power.

[0073] More specifically, the required electric heating power is determined by the required steam flow rate, which is obtained by multiplying the required steam mass flow rate by the aforementioned latent heat of vaporization. It should be noted that calculating the heating capacity using this method requires the following conditions to be met: the humidifying water tank has excellent insulation, making heat leakage negligible; the preheating water tank heats the water to be used to the same temperature as the boiling point of the water inside the humidifying water tank, preventing the addition of cold water; and the water level in the humidifying water tank remains constant to avoid changes in steam flow rate caused by the piston effect resulting from water level fluctuations.

[0074] It should be noted that the "latent heat of vaporization" refers to the amount of heat required for water to change from a liquid phase to a gas phase at a constant temperature (boiling point).

[0075] The humidification unit is selected after the dry air is conditioned and introduced into the air inlet pipe of the test chamber to be treated. A certain amount of water vapor is added according to the specific working conditions at each time. After mixing with the dry air in the air inlet pipe, the air with the required temperature and humidity is formed and then introduced into the test chamber to be treated. At the same time, the test chamber to be treated is vented. The specified humidity is finally achieved through gas replacement.

[0076] By adjusting the heat power of the electric heating element, water vapor is generated in the humidification tank, and the generated water vapor is mixed into the dry air in the air inlet pipe to continuously humidify the test chamber.

[0077] Specifically, the rate of water vapor generation can be adjusted by regulating the heating power of the heater, thereby controlling the amount of humidification.

[0078] For the feedforward compensation strategy, the inlet humidity of the test chamber to be treated is collected, and the coupling influence quantity quantified by the coupling relationship between temperature, humidity and air volume is used to control the margin corresponding to the pre-cooling or preheating under the specific working conditions at each moment.

[0079] The coupling relationship between temperature, humidity, and air volume was analyzed, and the coupling effect was quantified for pre-cooling supplementation.

[0080] In one specific implementation, the temperature change caused by steam humidification is calculated based on the set target humidity.

[0081] Calculate the temperature change caused by steam humidification using the following expression:

[0082]

[0083] Where Δt represents the temperature change caused by the humidification treatment; t v The temperature of the generated water vapor, t, is the water vapor temperature. 目标 d represents the set target humid air temperature, i.e., the control target humid air temperature inside the test chamber to be treated; d represents the moisture content in the air inside the test chamber to be treated.

[0084] Based on the calculated temperature change, the dry air in the air inlet duct is pre-cooled and compensated in advance.

[0085] For example, when processing the temperature of the upstream air inlet duct 8, the target temperature of the dry air is set slightly lower than the final target temperature. For instance, if the control target is 30℃ and 95% relative humidity, the calculated Δt is 3.32℃, and the dry air supplied from the upstream should be controlled at 30℃ - Δt = 26.68℃.

[0086] The evaporation rate is controlled by the heat output of the electric heating element, thus controlling the steam flow rate. Since heating power is directly related to steam flow rate, higher heating power results in more vigorous boiling and more steam production. Reducing the heating power decreases the steam output, and when heating stops, boiling within the humidifying tank ceases.

[0087] Optionally, a steam discharge valve and a steam shut-off valve are installed on the steam delivery pipe between the humidification water tank and the air inlet pipe. The steam discharge valve is used to discharge excess water vapor to the external environment, and the steam shut-off valve is used to stop the supply of water vapor to the air inlet pipe. Through the linkage between the steam discharge valve and the steam shut-off valve, when the steam shut-off valve is closed, the steam discharge valve opens, which can effectively ensure that the humidification water tank has a discharge channel, avoid pressure rise, and effectively achieve accurate control of evaporation rate and steam flow rate.

[0088] Next, precisely controlled water vapor is directly mixed with the dry air to be humidified in the air inlet duct to achieve effective humidification under hypergravity. Because the control logic of this application uses direct control of heating to adjust the flow rate of water vapor, it avoids the lag problem in the air humidity detection stage of conventional humidity control methods, achieving rapid and dynamic control and yielding excellent results.

[0089] Optionally, gas enters through the air inlet duct and exits through the air outlet duct, forming a gas exchange. The air blown from the upstream of the air inlet duct of the test chamber is temperature-controlled dry air, and water vapor of a specific flow rate (i.e., the flow rate of water vapor calculated above) is mixed in through the steam shut-off valve. The humidity of the incoming air is controlled in this way, and the humidity inside the test chamber is controlled by continuously replacing the air inside the test chamber. The humidity is measured and recorded by a humidity sensor.

[0090] It should be noted that the above is only an optional example and should not be construed as a limitation of this application.

[0091] Compared with existing technologies, this application adopts a method of directly controlling the heating power of the electric heating tube, which effectively determines the water vapor for adjusting humidity and precisely controls the steam flow rate. The generated water vapor is directly mixed with the dry air to be humidified and then introduced into the test chamber, which realizes more effective humidity adjustment in hypergravity environment and avoids the lag problem of conventional humidity detection feedback methods, thereby achieving rapid and dynamic control of the humidity of the test chamber.

[0092] The following is in conjunction with the appendix Figure 2 and Figure 3 Detailed description of optional embodiments of the system in this application.

[0093] like Figure 2 and Figure 3As shown, this application provides an air humidity control system for a test chamber. The air humidity control system includes a test chamber 9, a humidification water tank 5, and a water supply pipeline 1. The air humidity control system is applied to the control of circulating air humidity under a 100g hypergravity environment.

[0094] Specifically, the test chamber 9 is connected to an air inlet pipe 8, which is used to deliver dry air into the test chamber 9.

[0095] A humidifying water tank 5 is connected to a water supply pipe 1. An electric heating element 52 is installed at the bottom of the humidifying water tank 5. The humidifying water tank 5 is used to hold water to replenish the test chamber 9. By controlling the heating power of the electric heating element 52, the water in the humidifying water tank 5 generates water vapor, which mixes with the dry air in the air inlet pipe 8 to continuously humidify the test chamber 9. A water supply pipe 1 is used to supply water to the test chamber 9. A preheater 4 is installed on the water supply pipe 1, located upstream of the humidifying water tank 5, and is used to preheat the water to be used.

[0096] Furthermore, a pressure reducing valve 2 and a water supply valve 3 are sequentially installed on the water supply pipeline 1. The water supply valve 3 controls the water supply to the humidification water tank 5 by controlling its opening or closing. The water supply pipeline 1 is used to provide pure water. Due to the effect of gravity, the water supply pressure is relatively high, and it needs to be reduced to a suitable pressure by the pressure reducing valve 2.

[0097] A preheater 4 is installed on the upstream side of the humidifying water tank 5. Before supplying water to the humidifying water tank 5, the water to be used is preheated by the preheater 4.

[0098] The air humidity control system inside the test chamber also includes a controller, which is electrically connected to the water supply valve 3, the steam discharge valve 6, and the steam shut-off valve 7. The controller is used to control the water supply valve 3 to supply water to the humidifying water tank 5. The controller is used to control the steam discharge valve 6 to discharge steam to the external environment. The controller is used to control the steam shut-off valve 7 to cut off the water vapor supplied to the air inlet pipe 8.

[0099] Furthermore, a steam discharge valve 6 and a steam shut-off valve 7 are installed on the steam delivery pipe between the humidification water tank 5 and the air inlet pipe 8. The steam discharge valve 6 is used to discharge excess water vapor to the external environment, and the steam shut-off valve 7 is used to stop the supply of water vapor to the air inlet pipe 8. Through the linkage of the steam discharge valve 6 and the steam shut-off valve 7, when the steam shut-off valve is closed, the steam discharge valve 6 opens, which can effectively ensure that the humidification water tank 5 has a discharge channel, avoid pressure rise, and effectively achieve accurate control of evaporation rate and steam flow rate.

[0100] The preheater 4 is positioned below the humidification water tank 5, meaning the preheater 4 is located below the humidification water tank 5. This positional difference between the preheater 4 and the humidification water tank 5 creates a gravitational pressure difference. Utilizing the gravitational pressure difference generated by the 100g gravitational environment, the internal pressure of the preheater 4 is increased, thereby raising the boiling point of the water and preventing boiling within the preheater.

[0101] Specifically, the positional difference between the preheater and the humidification tank creates a super-gravity pressure difference (e.g., a pressure difference of about 0.2 MPa), which pressurizes the preheater 4, increasing its internal pressure and thus its boiling point. This prevents the preheater 4 from boiling and generating gas, allowing it to heat the water to the first specified temperature while maintaining a liquid state without boiling. This avoids the generation of steam bubbles during preheating, effectively ensuring a uniform and stable temperature for the water to be used. Furthermore, it prevents unnecessary air resistance or flow instability before the water enters the humidification tank 5, thereby effectively controlling the temperature inside the humidification tank.

[0102] In this example, the humidifying water tank 5 is an atmospheric pressure container with an insulation layer, and is equipped with an electric heating element 52 for heating and a level gauge 53 for monitoring the water level. The electric heating element 52 is located at the bottom of the humidifying water tank 5, and is used to heat the water inside the humidifying water tank to a second specified temperature, so that the water inside the humidifying water tank 5 boils and generates water vapor.

[0103] Specifically, two steam pipelines are led out from the top of the humidification tank 5, controlled by a steam shut-off valve 7 and a steam discharge valve 6, respectively. The outlet of the steam shut-off valve 7 is connected to the air inlet pipe 8, and the mixed gas is introduced into the test chamber 9 to be treated.

[0104] In one example, when the system is started, if the level gauge 53 detects that the water level in the humidification tank 5 is lower than the water level line, the water supply valve 3 will be opened to replenish water. The water to be used first flows through the preheater 4. By controlling the heating power of the preheater 4, the water to be used is heated to a first specified temperature (e.g., 120℃~140℃) and then enters the humidification tank 5. After the water level in the humidification tank 5 is replenished to the water level line, the water supply valve 3 will be closed.

[0105] The humidity inside the test chamber is controlled, and test chamber 9 is humidified. The controller calculates the required water vapor flow rate based on the target humidity parameters and dry air flow rate, and further converts it into the target heating power required by the electric heating tube 52.

[0106] Next, the heating element 52 continuously heats the water in the humidification tank 5 at the target power, causing the water to boil steadily and generating a specific flow rate of steam. Simultaneously, the controller opens the steam shut-off valve 7 and closes the steam discharge valve 6. The generated steam is then introduced into the air inlet pipe 8 through the open steam shut-off valve 7, where it mixes directly with the temperature-controlled dry air from the air inlet pipe 8 before being introduced into the test chamber 9.

[0107] For humidity control within the test chamber 9, mixed humidified air is introduced into the chamber to continuously replace the existing gas, thereby rapidly adjusting and stabilizing the humidity within the chamber to the target value. The humidity sensor 91 within the test chamber 9 is used for data measurement and recording, but does not participate in the main control loop.

[0108] When humidification needs to be stopped or the humidity changed, the controller closes the steam shut-off valve 7 and simultaneously opens the steam exhaust valve 6. At this time, the heating element 52 can continue to work or adjust its power, and excess water vapor is discharged to the outside through the steam exhaust valve 6, thereby ensuring no pressure buildup in the humidification water tank 5, effectively improving system safety, and preparing for the next rapid response.

[0109] Optionally, the inlet humidity of the test chamber to be treated is collected. The coupling effect quantified by the coupling relationship between temperature, humidity, and airflow is used to control the humidification temperature rise under extreme conditions (dry cold, humid cold, dry heat, humid heat) and the corresponding margin for pre-cooling or pre-heating (example tables show: 0.02℃, 0.16℃, 0.34℃, 3.32℃). The pre-cooling / pre-heating design needs to reserve corresponding margins. The extreme conditions include dry cold, humid cold, dry heat, and humid heat.

[0110] The system effectively achieves rapid and precise control of the humidity in the test chamber under conditions such as 100g hypergravity. Its response speed and dynamic adjustment performance are far superior to traditional humidity feedback-based control systems, resulting in excellent performance.

[0111] Compared with existing technologies, this application adopts a method of directly controlling the heating power of the electric heating tube, which effectively determines the water vapor for adjusting humidity and precisely controls the steam flow rate. The generated water vapor is directly mixed with the dry air to be humidified and then introduced into the test chamber, which realizes more effective humidity adjustment in hypergravity environment and avoids the lag problem of conventional humidity detection feedback methods, thereby achieving rapid and dynamic control of the humidity of the test chamber.

[0112] like Figure 4As shown, this embodiment provides an electronic device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the method steps described in the above embodiment.

[0113] This application provides a non-volatile computer storage medium storing computer-executable instructions that can perform the steps described in the above embodiments.

[0114] The following is for reference. Figure 4 The diagram illustrates a structural schematic of an electronic device suitable for implementing the embodiments of this application. The terminal devices in the embodiments of this application may include, but are not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 4 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0115] like Figure 4 As shown, the electronic device may include a processing system (e.g., a central processing unit, a graphics processing unit, etc.) 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage system 408 into a random access memory (RAM) 403. The RAM 403 also stores various programs and data required for the operation of the electronic device. The processing system 401, ROM 402, and RAM 403 are interconnected via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0116] Typically, the following systems can be connected to I / O interface 405: input systems 406 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output systems 407 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage systems 408 including, for example, magnetic tapes, hard disks, etc.; and communication systems 409. Communication system 409 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 4 Electronic devices with various systems are shown, but it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.

[0117] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication system 409, or installed from storage system 408, or installed from ROM 402. When the computer program is executed by processing system 401, it performs the functions defined in the methods of embodiments of this application.

[0118] It should be noted that the computer-readable medium described above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, system, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0119] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0120] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0121] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0122] The units described in the embodiments of this application can be implemented in software or hardware. The names of the units are not, in some cases, limiting the scope of the unit itself.

Claims

1. A method of controlling the humidity of air in a test chamber, characterized by, include: Determine the required water vapor flow rate inside the test chamber based on the target humidity parameters and dry air flow rate; By adjusting the heating capacity of the preheater and preheating the water to be used in the humidification tank based on the inlet and outlet temperatures of the preheater, the water to be used reaches a first specified temperature. The water to be used is used to replenish water into the humidification tank. The amount of water inside the humidifying water tank is controlled based on the water level line inside the humidifying water tank. By adjusting the heat power of the electric heating tube, the water in the humidification tank generates the required amount of water vapor, and the generated water vapor mixes with the dry air in the air inlet duct to continuously humidify the test chamber. This includes pre-cooling compensation treatment of the dry air in the air inlet duct based on a feedforward compensation strategy.

2. The method of claim 1, wherein The step of determining the required water vapor flow rate in the test chamber based on the target humidity parameters and dry air flow rate includes: Based on the required humidification amount under different hot and humid conditions, and based on the maximum air flow rate, maximum air moisture content, air density, and water vapor density, calculate the water vapor mass flow rate and water vapor volume flow rate to determine the required water vapor flow rate in the test chamber to be treated. The test chamber to be treated includes continuous operation for a specified period of time under hypergravity.

3. The method of claim 1, wherein include: The coupling relationship between temperature, humidity, and air volume is analyzed, and the coupling effect is quantified for feedforward supplementation and pre-cooling supplementation.

4. The method of controlling humidity of air in a test chamber according to claim 1 or 3, wherein include: Based on the set target humidity, the temperature change caused by humidification is calculated to pre-cool and compensate for the dry air in the air inlet duct. The following expression is used to calculate the temperature change caused by humidification: where Δt represents the amount of temperature change caused by the humidification treatment; t v represents the temperature of the generated water vapor, i.e., the water vapor temperature, t 目标 represents the set target wet air temperature, i.e., the control target wet air temperature in the test chamber to be treated; d represents the moisture content in the air in the test chamber to be treated.

5. The method of controlling humidity of air in a test chamber according to claim 1, wherein, include: The preheater is placed below the humidification water tank, and the positional difference between the preheater and the humidification water tank is used to create a super-gravity pressure difference to control the temperature inside the humidification water tank. The preheater is controlled to preheat the water to be used to a first specified temperature at a specific time, where the first specified temperature is the boiling temperature of the water in the humidification tank.

6. The method of controlling humidity of air in a test chamber according to claim 1, wherein include: A level gauge is used to monitor the water level inside the humidification tank, and a water supply valve is used in conjunction to control the water level inside the humidification tank to maintain the water level at the specified line.

7. The method of controlling humidity of air in a test chamber according to claim 1, wherein include: After continuous humidity conditioning of the test chamber, the temperature inside the test chamber is adjusted to meet the target humidity parameters while satisfying a preset temperature range, which includes a specified humidity range, a specified humidity uniformity, and a specified humidity fluctuation. The specified humidity range is 10%RH to 95%RH, the specified humidity uniformity is less than or equal to 3%, and the specified humidity fluctuation is ±2.5%RH.

8. The method for controlling air humidity inside the test chamber according to claim 1 or 2, characterized in that, The inlet humidity of the test chamber to be treated is collected, and the coupling effect quantified by the coupling relationship between temperature, humidity and air volume is used to control the margin corresponding to the pre-cooling or pre-heating under extreme conditions, including dry cooling, humidified cooling, dry heating and humidified heating.

9. An air humidity control system in a test chamber, characterized by The method for controlling air humidity inside the test chamber according to any one of claims 1 to 8 includes: A to-be-processed test chamber is connected with an air inlet pipe for delivering dry air into the to-be-processed test chamber; A humidification water tank is connected with a water supply pipe, and the bottom of the humidification water tank is provided with an electric heating pipe, the humidification water tank is used for containing standby water for supplying water to the to-be-processed test chamber, the standby water in the humidification water tank generates water vapor by controlling the heating power of the electric heating pipe, and the water vapor is mixed into the dry air in the air inlet pipe to continuously humidify the to-be-processed test chamber. A water supply pipeline is arranged for supplying water to the to-be-processed test chamber, and a preheater is arranged on the water supply pipeline, the preheater is located upstream of the humidification water tank, and is used for preheating the standby water.

10. The test chamber internal air humidity control system of claim 9, wherein, Comprise: A water supply valve is arranged for controlling the supply of water to the humidification water tank by controlling the opening or closing of the water supply valve; A cut-off valve is arranged on the pipeline between the humidification water tank and the air inlet pipe, and is used for cutting off the water vapor delivered to the air inlet pipe.

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