Concrete curing simulation device capable of automatically regulating and controlling air pressure and regulating and controlling method thereof

Abstract

The invention discloses a concrete curing simulation device capable of automatically regulating and controlling air pressure and a regulating and controlling method thereof.The concrete curing simulation device comprises a pressure communication device, a curing box and a sensor assembly, a test block is arranged in the curing box, and the curing box is connected with the exhaust end of the pressure communication device; the monitoring end of the sensor assembly is connected with the pressure communication device and the curing box. According to the device, the real air pressure change in the curing box is monitored in real time through a high-precision pressure sensor arranged at the upper end of an air storage tank, and monitoring data are transmitted to a control system. In combination with a target air pressure value preset by a user, the system can automatically regulate and control on and off of the intelligent air exhaust switch, and accurate adjustment of air pressure is achieved. According to the method, the air pressure change trend in the box can be accurately predicted by establishing an air pressure change model and comprehensively considering environment temperature and humidity factors, so that closed-loop feedback control is realized.

Description

Technical Field

[0001] The invention relates to the field of automation design, and in particular to a concrete curing simulation device capable of automatically regulating air pressure and a regulating method thereof. Background Art

[0002] In the high-altitude areas of western China, air pressure has a serious impact on the microstructure and macroscopic properties of concrete, and special construction conditions bring many safety risks to concrete buildings. Therefore, it is of great significance to explore the mechanism of concrete performance degradation under low air pressure conditions and propose targeted improvement measures.

[0003] Limited by environmental conditions and curing equipment, existing research mainly focuses on the curing performance of concrete at room temperature and pressure, while there is a lack of research on the impact of air pressure changes on mechanical properties after curing. At present, low-pressure concrete curing is usually carried out in specific low-pressure areas, which is time-consuming and labor-intensive, and increases the complexity of the operation. In addition, existing technologies cannot automatically adjust the air pressure in different altitudes remotely. If the air pressure in different altitudes is to be adjusted remotely, it can only rely on manual operation. However, manual operation has a series of problems such as low efficiency, poor accuracy and high cost. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete curing simulation device and a control method thereof that can automatically control air pressure. The device monitors the real air pressure changes inside the curing box in real time through a high-precision pressure sensor installed on the upper end of the gas storage tank, and transmits the monitoring data to the control system. Combined with the target air pressure value preset by the user, the system can automatically control the opening and closing of the intelligent air extraction switch to achieve precise adjustment of air pressure.

[0005] At the same time, the present invention also innovatively proposes a method for predicting the air pressure in the curing box based on a deep learning network. This method can accurately predict the trend of air pressure changes in the box by establishing an air pressure change model and comprehensively considering the environmental temperature and humidity factors, thereby realizing closed-loop feedback control.

[0006] To achieve the above object, the present invention is implemented according to the following technical solutions:

[0007] The concrete curing simulation device capable of automatically regulating air pressure of the present invention comprises a pressure connecting device, a curing box and a sensor assembly, wherein a test block is arranged in the curing box, the curing box is connected to the exhaust end of the pressure connecting device, and the monitoring end of the sensor assembly is connected to the pressure connecting device and the curing box.

[0008] Furthermore, the pressure connecting device includes an air compressor, an intelligent air extraction switch ventilation pipe, an air storage tank, an exhaust pipe, and a connecting valve. The exhaust end of the air compressor is connected to the air inlet of the air storage tank through the ventilation pipe, the intelligent air extraction switch is arranged in series on the pipe of the ventilation pipe, the exhaust end of the air storage tank is connected to the air inlet end of the maintenance box through the exhaust pipe, the connecting valve is arranged on the pipe of the exhaust pipe, and the sensor assembly is arranged on the air storage tank and the maintenance box.

[0009] The sensor assembly includes an air pressure sensor, a temperature and humidity sensor, and an air pressure regulating device. The air pressure sensor is connected to the detection end of the gas storage tank, the temperature and humidity sensor is connected to the detection end of the curing box, the signal output ends of the air pressure sensor and the temperature and humidity sensor are connected to the air pressure regulating device, and the control signal output end of the air pressure regulating device is connected to the control signal input end of the intelligent air extraction switch.

[0010] The air pressure regulating device includes a single-chip microcomputer and a display. The display is an LED TV screen, which is used to display the fixed air pressure value input by the user, the actual air pressure value in the curing box, and the temperature and humidity data; the single-chip microcomputer is an ATC single-chip microcomputer, the written program is burned into the single-chip microcomputer, and the start and stop of the air compressor are controlled through the drive circuit.

[0011] The single-chip microcomputer includes an air pressure input unit, a data storage unit, an air pressure identification unit and an air pressure prediction unit. The air pressure input unit is used for the user to directly input the target air pressure value or the corresponding altitude; the data storage unit has built-in altitude-air pressure correspondence data, and quickly retrieves the matching air pressure value according to any altitude input by the user; the air pressure identification unit automatically controls the start and stop status of the air compressor by comparing the actual air pressure value fed back by the air pressure sensor with the preset air pressure value in real time; the air pressure prediction unit predicts the air pressure change trend in the maintenance box based on the data collected by the temperature and humidity sensor, and adjusts the working status of the air compressor in advance to achieve active regulation of air pressure.

[0012] The control method of the concrete curing simulation device capable of automatically controlling air pressure of the present invention is characterized by comprising initial air pressure adjustment, adjustment of air pressure at high altitude in a different place, air pressure adjustment during curing and air pressure prediction based on a neural network;

[0013] Initial air pressure adjustment: When the system is started, the air pressure regulating device first reads the air pressure value set by the user, and compares it with the air pressure value of the curing box fed back by the air pressure sensor. If the two are consistent, the intelligent air extraction switch remains closed, the air compressor is also in a shutdown state, and the device is in a stable air pressure balance state, ready for the test block curing; if the air pressure value set by the user is inconsistent with the air pressure value fed back by the air pressure sensor, the air pressure regulating device will automatically issue a command to open the intelligent air extraction switch, and start the air compressor through the drive circuit, suck in the outside air, compress it and deliver it to the air tank, and then deliver the adjusted air pressure to the curing box through the ventilation pipe. When the air pressure value is adjusted to the same as the air pressure value set by the user, the air pressure regulating device automatically closes the air extraction valve and the air compressor. At this time, the air pressure values ​​in the air tank and the curing box reach a balanced state, and the curing of the test block begins;

[0014] Adjustment of air pressure at high altitudes in different places: When the system is started, the air pressure regulating device first reads the altitude set by the user, and accesses the built-in air pressure database to retrieve the standard atmospheric pressure value corresponding to the altitude; then, the control system automatically triggers the intelligent air extraction switch to turn on through a digital signal, and at the same time, the drive circuit sends a signal to start the air compressor. During this process, the air pressure sensor monitors the air pressure changes inside the curing box in real time, and feeds the data back to the air pressure regulating device for closed-loop control. When the deviation between the detected air pressure value and the target air pressure value is within the allowable range, the control system automatically cuts off the working circuit of the intelligent air extraction switch and the air compressor, completing the air pressure adjustment process and starting to cure the test block;

[0015] Air pressure adjustment during curing: During the curing process, the air pressure sensor monitors the air pressure changes inside the curing box in real time. The test block continuously undergoes hydration reaction to generate heat. If the air pressure changes beyond the set air pressure value, the air pressure regulating device will automatically issue a command again to turn on the intelligent air extraction switch and start the air compressor to adjust the air pressure in the curing box. When the air pressure between the curing box and the gas tank reaches equilibrium again, the air pressure regulating device automatically turns off the intelligent air extraction switch and the air compressor.

[0016] Air pressure prediction based on neural network: In order to achieve precise control of the air pressure inside the curing box, this system has designed an intelligent control algorithm based on deep learning. The algorithm uses the real-time environmental parameters collected by the temperature and humidity sensors as input. The neural network model established through training can accurately predict the trend of air pressure changes over a period of time, perceive the direction of air pressure changes in the curing box in advance, calculate the optimal air pressure regulation strategy, and output the corresponding control signal to drive the intelligent vacuum switch, so that the air pressure inside the curing box is always maintained at the set stable value.

[0017] The beneficial effects of the present invention are:

[0018] The present invention is a concrete curing simulation device and a control method thereof that can automatically control air pressure. Compared with the prior art, the present invention realizes intelligent and precise control of air pressure during the curing process of concrete test blocks. Users can make initial settings by directly inputting the target air pressure value or the altitude value, and the system can automatically complete the air pressure adjustment. The system uses an air pressure sensor to monitor the air pressure inside the curing box in real time, and through the coordinated work of the intelligent air extraction switch and the air compressor, ensure that the air pressure in the box is maintained within the set value range (the error is controlled within 0.5% to 1%). In particular, during the curing process, the system can respond to the air pressure changes caused by the concrete hydration reaction in a timely manner, predict the air pressure change trend through a deep learning algorithm and perform intelligent adjustment, realize the precise control and automatic management of the curing environment, and improve the quality and efficiency of the concrete test block curing. The use of this device can effectively solve the problem of automatically controlling the air pressure in different altitudes in different places during the concrete curing process. The device has the basis for serial promotion and can greatly improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of data transmission between the sensor and the air pressure regulating device;

[0021] Figure 3 It is a principle block diagram of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the gas pressure regulating device;

[0023] Figure 5 For the air pressure prediction process;

[0024] In the figure: 1-air compressor; 2-intelligent air extraction switch; 3-ventilation pipe; 4-air storage tank; 5-air pressure sensor; 6-ventilation pipe; 7-connecting valve; 8-temperature and humidity sensor; 9-cover; 10-curing box; 11-test block; 12-air pressure regulating device. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0026] like Figure 1-5 As shown: the concrete curing simulation device capable of automatically regulating air pressure of the present invention comprises a pressure connecting device, a curing box 10 and a sensor assembly, wherein a test block 11 is arranged in the curing box 10, the curing box 10 is connected to the exhaust end of the pressure connecting device, and the monitoring end of the sensor assembly is connected to the pressure connecting device and the curing box 10.

[0027] Furthermore, the pressure connection device includes an air compressor 1, an intelligent air extraction switch 2, a ventilation pipe 3, an air tank 4, an exhaust pipe 6, and a connecting valve 7. The exhaust end of the air compressor 1 is connected to the air inlet of the air tank 4 through the ventilation pipe 3, the intelligent air extraction switch 2 is arranged in series on the pipe of the ventilation pipe 3, the exhaust end of the air tank 4 is connected to the air inlet end of the maintenance box 10 through the exhaust pipe 6, the connecting valve 7 is arranged on the pipe of the exhaust pipe 6, and the sensor assembly is arranged on the air tank 4 and the maintenance box 10.

[0028] The sensor assembly includes an air pressure sensor 5, a temperature and humidity sensor 8, and an air pressure regulating device 12. The air pressure sensor 5 is connected to the detection end of the gas storage tank 4, the temperature and humidity sensor 8 is connected to the detection end of the curing box 10, the signal output ends of the air pressure sensor 5 and the temperature and humidity sensor 8 are connected to the air pressure regulating device 12, and the control signal output end of the air pressure regulating device 12 is connected to the control signal input end of the intelligent air extraction switch 2. In order to improve the accuracy of air pressure regulation and avoid drastic fluctuations in air pressure in the curing box, we designed a set of pressure connecting devices based on the principle of communicating vessels to realize an indirect regulation mechanism: the air pressure inside the curing box can be stably regulated by simply adjusting the pressure in the gas storage tank. Both the air pressure sensor 5 and the temperature and humidity sensor 8 are digital air pressure sensors; the air pressure sensor 5 is used to monitor the pressure value of the connection between the gas storage tank 4 and the curing box 10; the temperature and humidity sensor 8 is used to monitor the changes in temperature and humidity inside the curing box 10; and the output ends of the two sensors are electrically connected to the single-chip microcomputer input end of the air pressure regulating device 12.

[0029] The air pressure regulating device 12 includes a single chip microcomputer and a display. The display is an LED TV screen, which is used to display the fixed air pressure value input by the user, the actual air pressure value in the curing box, and the temperature and humidity data; the single chip microcomputer adopts an AT89C51 single chip microcomputer, and the written program is burned into the single chip microcomputer, and the start and stop of the air compressor 1 is controlled through the driving circuit. When the air pressure value of the curing box 10 fed back by the air pressure sensor 5 is compared with the air pressure value set by the user, the normal range of the air pressure error is 0.5% to 1%.

[0030] The single chip microcomputer includes an air pressure input unit, a data storage unit, an air pressure identification unit and an air pressure prediction unit. The air pressure input unit is used for the user to directly input the target air pressure value or the corresponding altitude; the data storage unit has built-in altitude-air pressure correspondence data, and quickly retrieves the matching air pressure value according to any altitude input by the user; the air pressure identification unit automatically controls the start and stop status of the air compressor 1 by comparing the actual air pressure value fed back by the air pressure sensor 5 with the preset air pressure value in real time; the air pressure prediction unit predicts the air pressure change trend in the maintenance box 10 based on the data collected by the temperature and humidity sensor 8, and adjusts the working status of the air compressor 1 in advance to realize active regulation of the air pressure.

[0031] The air pressure regulating device 12 controls the intelligent air extraction switch 2 by determining whether the air pressure value in the curing box 10 fed back by the pressure sensor is consistent with the set air pressure value, thereby regulating the start and stop of the air compressor and maintaining the air pressure values ​​in the air storage tank 4 and the curing box 10 in a balanced state; the air pressure regulating device 12 can also predict the changing trend of the air pressure value in the curing box 10 through the temperature and humidity sensor 8, and start the intelligent air extraction switch 2 before it changes, thereby regulating the air compressor 1, so that the air pressure in the curing box 10 remains at a stable value.

[0032] The control method of the concrete curing simulation device capable of automatically controlling air pressure of the present invention is characterized by comprising initial air pressure adjustment, adjustment of air pressure at high altitude in a different place, air pressure adjustment during curing and air pressure prediction based on a neural network;

[0033] Initial air pressure adjustment: When the system is started, the air pressure regulating device 12 first reads the air pressure value set by the user, and compares it with the air pressure value of the curing box 10 fed back by the air pressure sensor 5. If the two are consistent, the intelligent air extraction switch 2 remains in a closed state, the air compressor 1 is also in a shutdown state, and the device is in a stable air pressure balance state, ready for the curing of the test block 11; if the air pressure value set by the user is inconsistent with the air pressure value fed back by the air pressure sensor 5, the air pressure regulating device 12 will automatically issue a command to open the intelligent air extraction switch 2, and start the air compressor 1 through the drive circuit, suck in the outside air, compress it and deliver it to the air storage tank 4, and then deliver the adjusted air pressure to the curing box 10 through the ventilation pipe. When the air pressure value is adjusted to be consistent with the air pressure value set by the user, the air pressure regulating device 12 automatically closes the air extraction valve and the air compressor 1. At this time, the air pressure values ​​in the air storage tank 4 and the curing box 10 reach a balanced state, and the curing of the test block 11 begins;

[0034] Adjustment of air pressure at high altitudes in other places: When the system is started, the air pressure regulating device 12 first reads the altitude set by the user, and accesses the built-in air pressure database to retrieve the standard atmospheric pressure value corresponding to the altitude; then, the control system automatically triggers the intelligent air extraction switch 2 to turn on through a digital signal, and at the same time, the driving circuit sends a signal to start the air compressor 1. During this process, the air pressure sensor 5 monitors the changes in the air pressure inside the curing box 8 in real time, and feeds the data back to the air pressure regulating device 12 for closed-loop control. When the deviation between the detected air pressure value and the target air pressure value is within the allowable range, the control system automatically cuts off the working circuits of the intelligent air extraction switch 2 and the air compressor 1, completes the air pressure adjustment process, and starts curing the test block 11;

[0035] Air pressure adjustment during the curing process: During the curing process, the air pressure sensor 5 monitors the air pressure changes inside the curing box 10 in real time. The test block 11 continuously undergoes hydration reaction to generate heat. If the air pressure changes beyond the set air pressure value, the air pressure regulating device 12 will automatically issue a command again to turn on the intelligent air extraction switch 6 and start the air compressor 1 to adjust the air pressure in the curing box 10. When the air pressure between the curing box 10 and the air storage tank 4 reaches equilibrium again, the air pressure regulating device 12 automatically turns off the intelligent air extraction switch 2 and the air compressor 1;

[0036] Air pressure prediction based on neural network: In order to achieve precise control of the air pressure inside the curing box 10, this system has designed an intelligent control algorithm based on deep learning. The algorithm uses the real-time environmental parameters collected by the temperature and humidity sensor 8 as input. The neural network model established through training can accurately predict the trend of air pressure changes over a period of time, perceive the direction of air pressure changes in the curing box 10 in advance, calculate the optimal air pressure regulation strategy, and output the corresponding control signal to drive the intelligent exhaust switch 2, so that the air pressure inside the curing box 10 is always maintained at the set stable value.

[0037] Example 1

[0038] like Figure 1 , 2As shown, a concrete curing simulation device capable of automatically regulating air pressure described in this embodiment includes an air pressure regulating device and an air compressor. The air compressor is connected to an intelligent air extraction switch and an air storage tank through a ventilation pipe. A pressure sensor is arranged on the upper part of the air storage tank. The air storage tank stores compressed air delivered by the air compressor to play a buffering role. When the air pressure output by the air compressor fluctuates, the air storage tank can balance the pressure to make the air pressure delivered to the curing box more stable. The air storage tank is connected to a curing box for storing concrete test blocks and simulating the construction site environment through a ventilation pipe; an air extraction valve is arranged on the ventilation pipe connected to the air storage tank to facilitate the opening and closing of the ventilation pipe. A cover plate and a temperature and humidity sensor are arranged above the curing box. The cover plate can seal the curing box to prevent outside air from entering the curing box, thereby ensuring the stability of the air pressure in the curing box and providing relatively stable air pressure conditions for simulating the construction site environment; at the same time, opening the cover plate provides a spacious entrance channel so that the concrete test blocks can be quickly and safely placed in a suitable position in the curing box, which is convenient for subsequent curing simulation experiments.

[0039] The air pressure regulating device consists of a display and a single-chip microcomputer, in which the display shows the target air pressure value set by the user and the real-time air pressure, temperature and humidity data in the curing box in real time. The single-chip microcomputer integrates four functional units: air pressure prediction, data storage, air pressure input and air pressure identification: the air pressure prediction unit predicts the direction of air pressure change inside the curing box by analyzing the changing trend of temperature and humidity in the curing box, so as to start the air compressor and the intelligent air extraction switch in advance; the data storage unit has built-in storage of standard air pressure values ​​corresponding to different altitudes in Table 1 for users to quickly select; the air pressure input unit supports users to directly input the target air pressure value or indirectly set it through the regional altitude; the air pressure identification unit is responsible for comparing the air pressure value fed back by the pressure sensor with the air pressure value set by the user. When the two are inconsistent, the intelligent air extraction switch is automatically controlled and the air compressor is started.

[0040] Example 2

[0041] The present invention provides a method for automatically regulating air pressure using the above device, and a method for adjusting initial air pressure, comprising the following steps:

[0042] When the system is started, the user directly inputs the target pressure value, and the air pressure input unit compares this set value with the air pressure value of the curing box fed back by the pressure sensor.

[0043] After reading the value in the pressure sensor, first determine whether it is consistent with the target pressure value:

[0044] Step A1: The two are consistent, keep the intelligent vacuum switch in the off state, and the air compressor is also in the shutdown state, ready for the concrete block curing.

[0045] Step A2: If the two are inconsistent, the single-chip microcomputer will automatically issue a command to turn on the intelligent air extraction switch, and start the air compressor through the drive circuit to suck in and compress the outside air and then send it to the air tank, and then send the adjusted air pressure to the curing box through the ventilation pipe. When the air pressure value is adjusted to the same as the air pressure value set by the user, the single-chip microcomputer automatically turns off the intelligent air extraction switch and the air compressor. At this time, the air pressure values ​​in the air tank and the curing box reach a balanced state, and the concrete test block begins to be cured.

[0046] Example 3

[0047] The present invention provides a method for automatically controlling air pressure using the above device, wherein a target air pressure value is indirectly selected by inputting an altitude, and the method comprises the following steps:

[0048] Step 1: When the system starts, the user directly enters the altitude value;

[0049] Step 2: After receiving the input, the barometric pressure input unit immediately accesses the built-in barometric pressure data unit and automatically retrieves the standard atmospheric pressure value corresponding to the altitude as the target barometric pressure value;

[0050] Step 3: The control system automatically triggers the intelligent air extraction switch to turn on through a digital signal, and the drive circuit sends a PWM signal to start the air compressor;

[0051] During this process, the air pressure sensor monitors the changes in air pressure inside the curing box in real time and feeds the data back to the single-chip microcomputer for closed-loop control. When the deviation between the detected air pressure value and the target air pressure value is within the allowable range, the control system automatically cuts off the working circuit of the intelligent air extraction valve and the air compressor, completes the air pressure adjustment process, and starts curing the concrete test block.

[0052] Example 4

[0053] During the curing process, the air pressure inside the curing box changes, and the air pressure regulating device adjusts the air pressure, including the following steps:

[0054] Step 1: Based on the principle of communicating vessels, we designed a pressure connection device between the gas tank and the curing box to realize an indirect adjustment mechanism. By regulating the pressure in the gas tank, the air pressure inside the curing box can be stably adjusted, effectively avoiding drastic fluctuations in air pressure and improving the accuracy of adjustment. The pressure sensor installed on the top of the gas tank can monitor the air pressure changes of the entire system in real time;

[0055] Step 2: During the curing process, the concrete test block will continue to undergo hydration reaction and release heat, causing the air pressure in the box to change. According to the principle of communicating vessels, this change will be synchronously reflected in the pressure sensor reading above the gas storage tank;

[0056] Step 3: The pressure sensor transmits the detected pressure change data to the air pressure regulating device, and the air pressure identification unit compares the actual air pressure value with the preset air pressure value. The air pressure error range allowed by the system is between 0.5% and 1%;

[0057] Step 4: When the air pressure deviation exceeds the allowable range, the microcontroller automatically issues a control command, turns on the intelligent air extraction switch and starts the air compressor;

[0058] Step 5: When the pressure value displayed by the pressure sensor reaches the preset pressure value, the microcontroller executes a shutdown command to stop the operation of the intelligent vacuum switch and the air compressor.

[0059] Embodiment 5:

[0060] The air pressure regulating device monitors the changes in temperature and humidity in the curing box in real time, predicts and regulates the changes in air pressure inside the box, thereby ensuring the operation of the equipment. The specific operating mechanism is as follows:

[0061] Step 1: Use the temperature and humidity sensor on the top of the curing box to continuously collect real-time temperature and humidity parameters inside the box to achieve real-time monitoring of environmental data.

[0062] Step 2: Input the collected temperature and humidity data into the air pressure prediction unit of the air pressure regulating device. The unit uses an advanced neural network model to deeply analyze and process the temperature and humidity data, so as to accurately predict the air pressure change trend of the curing box in the future time period.

[0063] Step 3: Based on the prediction results, the system generates the most optimized air pressure regulation scheme and converts it into precise control signals. These signals directly drive the intelligent air extraction switch and realize the air pressure regulation in the box;

[0064] Step 4: The system continuously monitors the air pressure status in the box to ensure that it remains within the set range. If it detects that the air pressure deviates from the set value, the system will immediately activate the feedback mechanism and re-enter the regulation cycle.

[0065] Such closed-loop control can achieve precise regulation and rapid response of air pressure.

[0066] Table 1 Comparison table of air pressure at different altitudes

[0067]

[0068]

[0069] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A concrete curing simulation device capable of automatically regulating air pressure, characterized in that: It comprises a pressure connection device, a curing box (10) and a sensor assembly, wherein a test block (11) is arranged in the curing box (10), the curing box (10) is connected to the exhaust end of the pressure connection device, and the monitoring end of the sensor assembly is connected to the pressure connection device and the curing box (10).

2. The concrete curing simulation device capable of automatically regulating air pressure according to claim 1 is characterized in that: The pressure connection device comprises an air compressor (1), an intelligent air extraction switch (2), a ventilation pipe (3), an air storage tank (4), an exhaust pipe (6), and a connecting valve (7); the exhaust end of the air compressor (1) is connected to the air inlet of the air storage tank (4) through the ventilation pipe (3); the intelligent air extraction switch (2) is arranged in series on the pipe of the ventilation pipe (3); the exhaust end of the air storage tank (4) is connected to the air inlet end of the maintenance box (10) through the exhaust pipe (6); the connecting valve (7) is arranged on the pipe of the exhaust pipe (6); and the sensor assembly is arranged on the air storage tank (4) and the maintenance box (10).

3. The concrete curing simulation device capable of automatically regulating air pressure according to claim 2 is characterized in that: The sensor assembly comprises an air pressure sensor (5), a temperature and humidity sensor (8), and an air pressure regulating device (12); the air pressure sensor (5) is connected to a detection end of the air storage tank (4); the temperature and humidity sensor (8) is connected to a detection end of the curing box (10); the signal output ends of the air pressure sensor (5) and the temperature and humidity sensor (8) are connected to the air pressure regulating device (12); and the control signal output end of the air pressure regulating device (12) is connected to a control signal input end of the intelligent air extraction switch (2).

4. The concrete curing simulation device capable of automatically regulating air pressure according to claim 3 is characterized in that: The air pressure regulating device (12) comprises a single-chip microcomputer and a display. The display is an LED television screen for displaying the fixed air pressure value input by the user, the actual air pressure value in the curing box, and the temperature and humidity data. The single-chip microcomputer is an AT89C51 single-chip microcomputer. The programmed program is burned into the single-chip microcomputer, and the start and stop of the air compressor (1) are controlled via a driving circuit.

5. The concrete curing simulation device capable of automatically regulating air pressure according to claim 4 is characterized in that: The single chip microcomputer includes a pressure input unit, a data storage unit, a pressure identification unit and a pressure prediction unit. The pressure input unit is used for the user to directly input the target pressure value or the corresponding altitude. The data storage unit has built-in altitude-pressure correspondence data, and can quickly retrieve the matching pressure value according to any altitude input by the user. The air pressure identification unit automatically controls the start and stop status of the air compressor (1) by comparing the actual air pressure value fed back by the air pressure sensor (5) with the preset air pressure value in real time; the air pressure prediction unit predicts the air pressure change trend in the curing box (10) based on the data collected by the temperature and humidity sensor (8), and adjusts the working state of the air compressor (1) in advance, thereby realizing active regulation of the air pressure.

6. A method for controlling a concrete curing simulation device capable of automatically controlling air pressure according to any one of claims 1 to 5, characterized in that: Including initial air pressure adjustment, adjustment of high-altitude air pressure in other places, air pressure adjustment during maintenance and air pressure prediction based on neural network; Initial air pressure adjustment: When the system is started, the air pressure regulating device (12) first reads the air pressure value set by the user and compares it with the air pressure value of the curing box (10) fed back by the air pressure sensor (5). If the two are consistent, the intelligent air extraction switch (2) remains in the closed state, the air compressor (1) is also in the shutdown state, and the device is in a stable air pressure balance state, ready for the curing of the test block (11); if the air pressure value set by the user is inconsistent with the air pressure value fed back by the air pressure sensor (5), the air pressure regulating device (12) will An instruction is automatically issued to turn on the intelligent air extraction switch (2), and the air compressor (1) is started through the driving circuit to suck in and compress the outside air and then transport it to the air storage tank (4), and then the adjusted air pressure is transported to the curing box (10) through the ventilation pipe. When the air pressure value is adjusted to be consistent with the air pressure value set by the user, the air pressure regulating device (12) automatically closes the air extraction valve and the air compressor (1), and at this time, the air pressure values ​​in the air storage tank (4) and the curing box (10) reach a balanced state, and the test block (11) begins to be cured; Adjustment of air pressure at high altitudes in other places: When the system is started, the air pressure regulating device (12) first reads the altitude set by the user, and accesses the built-in air pressure database to retrieve the standard atmospheric pressure value corresponding to the altitude; then, the control system automatically triggers the intelligent air extraction switch (2) to turn on through a digital signal, and at the same time, the driving circuit sends a signal to start the air compressor (1). During this process, the air pressure sensor (5) monitors the changes in the air pressure inside the curing box (8) in real time, and feeds the data back to the air pressure regulating device (12) for closed-loop control. When the deviation between the detected air pressure value and the target air pressure value is within the allowable range, the control system automatically cuts off the working circuits of the intelligent air extraction switch (2) and the air compressor (1), completes the air pressure regulation process, and starts curing the test block (11); Air pressure adjustment during the curing process: During the curing process, the air pressure sensor (5) monitors the air pressure change inside the curing box (10) in real time. The test block (11) continuously undergoes hydration reaction to generate heat. If the air pressure change exceeds the set air pressure value, the air pressure regulating device (12) will automatically issue a command again to open the intelligent air extraction switch (6) and start the air compressor (1) to adjust the air pressure inside the curing box (10). When the air pressure between the curing box (10) and the air storage tank (4) reaches equilibrium again, the air pressure regulating device (12) automatically closes the intelligent air extraction switch (2) and the air compressor (1); Air pressure prediction based on neural network: In order to achieve accurate regulation of the air pressure inside the curing box (10), the system is designed with an intelligent control algorithm based on deep learning. The algorithm uses the real-time environmental parameters collected by the temperature and humidity sensor (8) as input. Through the training of the established neural network model, it can accurately predict the trend of air pressure changes over a period of time, perceive the direction of air pressure changes in the curing box (10) in advance, calculate the optimal air pressure regulation strategy, and output a corresponding control signal to drive the intelligent exhaust switch (2), so that the air pressure inside the curing box (10) is always maintained at a set stable value.

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