A microscale simulation system with carbon dioxide concentration monitoring and pH measurement device

Abstract

The application discloses a kind of miniature simulation systems with carbon dioxide concentration monitoring and pH determination device, including atmospheric environment simulation bin, chemical absorption pool, ecological pool, carbon dioxide monitoring module, pH determination module and data processing module, wherein, atmospheric environment simulation bin is the sealed bin body structure with window, ecological pool is set in atmospheric simulation bin, chemical absorption pool is set in atmospheric simulation bin, semiconductor refrigerating sheet is equipped in chemical absorption pool, carbon dioxide monitoring module includes infrared sensing unit, gas sampling unit and signal pre-processing unit, pH determination module is set in chemical absorption pool, and pH determination module includes microelectrode detection unit, signal amplification unit, calibration unit and pH indicator module, data processing module includes microcontroller, data storage unit and communication unit, solve the technical problem that existing miniature simulation system monitoring parameter is single, cannot comprehensively reflect simulation system state.

Description

Technical Field

[0001] This invention relates to the technical field of simulation systems, and more particularly to a miniature simulation system with a carbon dioxide concentration monitoring and pH measurement device. Background Technology

[0002] Monitoring carbon dioxide concentration and measuring pH are important tools for understanding and studying the atmospheric environment. In a biomimetic simulation environment, constructing a system that can simulate the actual atmospheric environment and monitor carbon dioxide concentration and pH value can help to better study the interaction between carbon dioxide and pH value in the ecosystem.

[0003] Existing simulation systems are equipped with only single-parameter sensors, which can only monitor gas concentration and lack pH measurement capabilities, making it impossible to establish a correlation analysis between carbon dioxide and pH. Furthermore, some water quality monitoring devices do not integrate gas monitoring modules, making it difficult to comprehensively reflect the state of the ecosystem. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this invention is to propose a miniature simulation system with carbon dioxide concentration monitoring and pH measurement devices. Through miniaturized integrated design, it achieves real-time synchronous monitoring of carbon dioxide concentration and pH value within the simulation system. The carbon dioxide monitoring module adopts infrared sensing technology, while the pH measurement module adopts solid-state ion-selective microelectrode. This solves the technical problem that existing simulation systems have only one monitoring parameter and cannot fully reflect the state of the simulation system.

[0006] To achieve the above objectives, this invention proposes a micro-simulation system with carbon dioxide concentration monitoring and pH measurement devices, comprising an atmospheric environment simulation chamber, a chemical absorption pool, an ecological pool, a carbon dioxide monitoring module, a pH measurement module, and a data processing module. The atmospheric environment simulation chamber is a sealed chamber structure with a window. The ecological pool and the chemical absorption pool are both located within the atmospheric environment simulation chamber and contain a semiconductor cooling chip. The carbon dioxide monitoring module includes an infrared sensing unit, a gas sampling unit, and a signal preprocessing unit. The pH measurement module is located within the chemical absorption pool and includes a microelectrode detection unit, a signal amplification unit, a calibration unit, and a pH indicator module. The data processing module includes a microcontroller, a data storage unit, and a communication unit. The carbon dioxide monitoring module, pH measurement module, and data processing module are interconnected via interfaces to form a closed-loop control system, and are located within the atmospheric environment simulation chamber.

[0007] In addition, the micro-simulation system with carbon dioxide concentration monitoring and pH measurement device proposed according to the present invention may also have the following additional technical features:

[0008] Specifically, the infrared sensing unit is configured with a 14.2μm wavelength carbon dioxide characteristic absorption spectrum emitter and photodetector, and adopts a CM1109 dual-source sensor chip. The gas sampling unit is equipped with a miniature vacuum pump and a gas filter membrane. The flow rate of the miniature vacuum pump is 10-50mL / min, and the pore size of the gas filter membrane is 0.22μm. The signal preprocessing unit includes a lock-in amplifier circuit and a temperature compensation module.

[0009] Specifically, the microelectrode detection unit uses an IrO2 solid-state sensitive membrane, the calibration unit has a built-in two-point calibration program, and automatically calibrates using standard buffer solutions of pH 4.01, pH 6.86 and pH 9.18 with a calibration cycle of 24 hours. The pH indicator module contains a variety of indicators for visualizing the CO2 absorption process.

[0010] Specifically, the microcontroller of the data processing module adopts an ARM Cortex-M4 core with a sampling frequency of 10 Hz, the data storage unit has a capacity of more than 8 GB, and the communication unit supports USB, Bluetooth and Wi-Fi protocols.

[0011] Specifically, it also includes a feedback regulation module, which comprises a gas regulation unit, a light regulation unit, and a water quality regulation unit. The gas regulation unit includes a carbon dioxide adsorbent storage chamber and a make-up air pump. The adsorbent in the carbon dioxide adsorbent storage chamber is soda lime. The flow rate of the make-up air pump is 10-50 mL / min. The light regulation unit uses a combination of red and blue LED light sources with a light quality ratio of 3:1 and a light intensity that is continuously adjustable from 0 to 10000 lux. The water quality regulation unit includes a pH buffer storage chamber and a metering injection pump.

[0012] Specifically, it also includes a power supply module, which uses either a lithium battery or a solar panel for power supply, either alone or in combination.

[0013] Specifically, it also includes an auxiliary monitoring module, which includes a fluorescence dissolved oxygen sensor, a DS18B20 temperature sensor, and a conductivity sensor.

[0014] Specifically, the atmospheric environment simulation chamber is equipped with a gas circulation pump, which is connected to the chemical absorption tank.

[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device of the present invention realizes real-time synchronous monitoring of carbon dioxide concentration and pH value in the simulation system through miniaturized integrated design. The carbon dioxide monitoring module adopts infrared sensing technology, while the pH measurement module adopts solid-state ion-selective microelectrode, which solves the technical problem that the existing micro-simulation system has a single monitoring parameter and cannot fully reflect the state of the simulation system.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the micro-simulation system structure of the present invention, which has a carbon dioxide concentration monitoring and pH measurement device;

[0019] Figure 2 This is a schematic diagram of the carbon dioxide monitoring module in the micro-simulation system with carbon dioxide concentration monitoring and pH measurement device of the present invention;

[0020] Figure 3 This is a schematic diagram of the pH measurement module in the micro-simulation system with carbon dioxide concentration monitoring and pH measurement device of the present invention;

[0021] Figure 4 This is a schematic diagram of the data processing module structure in the micro-simulation system with carbon dioxide concentration monitoring and pH measurement device of the present invention;

[0022] Figure 5 This is a schematic diagram of the feedback adjustment module in the micro-simulation system with carbon dioxide concentration monitoring and pH measurement device of the present invention.

[0023] As shown in the figure: 1. Atmospheric environment simulation chamber; 2. Chemical absorption pool; 3. Ecological pool; 4. Carbon dioxide monitoring module; 5. pH measurement module; 6. Data processing module; 7. Infrared sensing unit; 8. Gas sampling unit; 9. Signal preprocessing unit; 10. Microelectrode detection unit; 11. Signal amplification unit; 12. Calibration unit; 13. pH indicator module; 14. Microcontroller; 15. Data storage unit; 16. Communication unit; 17. Miniature vacuum pump; 18. Gas filtration membrane; 19. Gas conditioning unit; 20. Light conditioning unit; 21. Water quality conditioning unit; 22. Feedback conditioning module; 23. Gas conditioning unit; 24. Light conditioning unit; 25. Water quality conditioning unit; 26. Carbon dioxide adsorbent storage chamber; 27. Make-up gas pump; 28. Power supply module; 29. ​​Auxiliary monitoring module; 30. Gas circulation pump. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0025] The following description, in conjunction with the accompanying drawings, describes a miniature simulation system with a carbon dioxide concentration monitoring and pH measurement device according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the micro-simulation system with carbon dioxide concentration monitoring and pH measurement devices according to an embodiment of the present invention includes an atmospheric environment simulation chamber, a chemical absorption pool, an ecological pool, a carbon dioxide monitoring module, a pH measurement module, and a data processing module. The atmospheric environment simulation chamber is a sealed chamber structure with a window. The ecological pool is located inside the atmospheric environment simulation chamber. The chemical absorption pool is located inside the atmospheric environment simulation chamber and contains a semiconductor cooling chip. The carbon dioxide monitoring module includes an infrared sensing unit, a gas sampling unit, and a signal preprocessing unit. The pH measurement module is located inside the chemical absorption pool and includes a microelectrode detection unit, a signal amplification unit, a calibration unit, and a pH indicator module. The data processing module includes a microcontroller, a data storage unit, and a communication unit. The carbon dioxide monitoring module, pH measurement module, and data processing module are interconnected through an interface to form a closed-loop control system, and are located inside the atmospheric environment simulation chamber.

[0027] Specifically, during use, the initial CO2 concentration in the gas chamber was 10%, and the water temperature was 20°C, simulating a seawater system. The circulation pump was turned on to allow the gas and absorbent liquid to contact in the microreactor. The pH value and CO2 concentration in the gas chamber were recorded every 10 seconds. Initially, the CO2 concentration decreased rapidly, and the pH dropped from 8.2 to 5.5. In the middle stage, the rate of pH decrease slowed down, and the system reached chemical equilibrium. In the later stage, the CO2 absorption capacity and average absorption rate were calculated. Ultimately, the system successfully simulated the entire process of water acidification caused by industrial emissions, with a response time of less than 30 seconds. By precisely controlling the carbon dioxide concentration and pH value in the atmospheric environment, a repeatable and controllable experimental platform can be constructed, thereby enabling the study of the impact of changes in carbon dioxide concentration and pH value on ecosystems, which is helpful for research in ecology and environmental science.

[0028] In one embodiment of the present invention, such as Figure 1 As shown, the infrared sensing unit is configured with a carbon dioxide characteristic absorption spectrum emitter and photodetector with a wavelength of 14.2μm, and adopts a CM1109 dual-source sensor chip. The gas sampling unit is equipped with a miniature vacuum pump and a gas filter membrane. The flow rate of the miniature vacuum pump is 10-50mL / min, and the pore size of the gas filter membrane is 0.22μm. The signal preprocessing unit includes a lock-in amplifier circuit and a temperature compensation module.

[0029] It should be noted that...

[0030] In one embodiment of the present invention, such as Figure 1 As shown, the microelectrode detection unit uses an IrO2 solid-state sensitive membrane. The calibration unit has a built-in two-point calibration program that automatically calibrates using standard buffer solutions of pH 4.01, pH 6.86, and pH 9.18. The calibration cycle is 24 hours. The pH indicator module contains a variety of indicators for visualizing the CO2 absorption process.

[0031] It should be noted that the MpH-001 pH microelectrode is used, with a probe diameter of 150μm and an insertion depth of 5cm into the liquid chamber. The signal amplification unit uses an INA128 precision operational amplifier. The IrO2 solid-state sensitive membrane can undergo an electrochemical reaction with H⁺ ions in the solution. This potential change is collected by the microelectrode. The built-in calibration unit uses a standard buffer solution to perform a calibration procedure periodically to ensure the accuracy of the electrode measurement results. This allows for long-term stable monitoring of pH values, enabling accurate measurements even during long-term continuous operation. The indicator is m-cresol purple or bromothymol blue, which can visually display changes during the absorption process.

[0032] In one embodiment of the present invention, such as Figure 1As shown, the feedback regulation module includes a gas regulation unit, a light regulation unit, and a water quality regulation unit. The microcontroller of the data processing module adopts an ARM Cortex-M4 core, with a sampling frequency of 10 Hz. The data storage unit has a capacity of more than 8 GB, and the communication unit supports USB, Bluetooth, and Wi-Fi protocols.

[0033] In one embodiment of the present invention, such as Figure 1 As shown, the gas conditioning unit includes a carbon dioxide adsorbent storage chamber and a make-up air pump. The adsorbent in the carbon dioxide adsorbent storage chamber is soda lime. The flow rate of the make-up air pump is 10-50 mL / min. The light conditioning unit uses a combination of red and blue LED light sources with a light quality ratio of 3:1 and a light intensity that is continuously adjustable from 0 to 10000 lux. The water quality conditioning unit includes a pH buffer storage chamber and a metering injection pump.

[0034] It should be noted that the carbon dioxide adsorbent storage chamber described in this embodiment has a capacity of 80 mL, the powder storage chamber is loaded with 0.1 mol / L Tris buffer, the quantitative injection pump has an accuracy of 1 μL / step, the gas regulation unit uses soda lime to adsorb carbon dioxide, and when the carbon dioxide concentration in the environment increases, the gas supply pump starts to remove carbon dioxide from the air; the light regulation unit regulates the light intensity and light quality through a combination of red and blue LED light sources to ensure that plants and other organisms can obtain the required light conditions; the water quality regulation unit 17 regulates the water quality by adding pH buffer to ensure the growth environment of microorganisms. In summary, these regulation measures work together to maintain the stability and ecological balance of the system.

[0035] In one embodiment of the present invention, such as Figure 1 As shown, it also includes a power supply module, which uses either a lithium battery or a solar panel for power supply, either alone or in combination.

[0036] It should be noted that the system uses a 12V / 10000mAh lithium battery, paired with a 5W solar panel, and a TP4056 charge / discharge management chip, ensuring continuous operation for more than 30 days. The lithium battery provides an immediate, stable, and reliable power supply, suitable for scenarios that do not require contact with an external power source. The solar panel provides sufficient power in environments with ample sunlight, reducing dependence on external power sources and increasing the system's adaptability and wide range of applications.

[0037] In one embodiment of the present invention, such as Figure 1 As shown, it also includes an auxiliary monitoring module, which includes a fluorescence dissolved oxygen sensor, a DS18B20 temperature sensor, and a conductivity sensor.

[0038] It should be noted that the dissolved oxygen sensor is the DO-001 type using fluorescence, the temperature sensor is the DS18B20 type, and the conductivity sensor is the EC-200 type. The fluorescence dissolved oxygen sensor can monitor the dissolved oxygen concentration in the water in real time, the DS18B20 temperature sensor is used to monitor the ambient temperature, and the conductivity sensor is used to measure the ion concentration in the water. The sum of these data makes the monitoring of the entire micro-ecosystem more comprehensive and accurate, enabling more accurate multi-dimensional analysis and adjustment.

[0039] In one embodiment of the present invention, such as Figure 1 As shown, the atmospheric environment simulation chamber is equipped with a gas circulation pump, which is connected to the chemical absorption tank.

[0040] It should be noted that the gas circulation pump ensures uniform gas flow within the atmospheric environment simulation chamber, promotes the stability of key parameters such as carbon dioxide concentration and pH value, ensures full contact at the gas-liquid interface, and ensures uniform gas exchange within the system through the gas circulation pump. This ensures the uniformity of the atmospheric environment simulation, improves the reliability and reproducibility of the experimental results, and provides a basic condition for accurate atmospheric environment simulation.

[0041] In summary, the micro-simulation system with carbon dioxide concentration monitoring and pH measurement devices in this embodiment of the invention achieves real-time synchronous monitoring of carbon dioxide concentration and pH value within the simulation system through miniaturized integrated design. The carbon dioxide monitoring module adopts infrared sensing technology, while the pH measurement module adopts solid-state ion-selective microelectrodes, solving the technical problem that existing micro-simulation systems have only one monitoring parameter and cannot fully reflect the state of the simulation system.

[0042] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A miniature simulation system with a carbon dioxide concentration monitoring and pH measurement device, characterized in that, It includes an atmospheric environment simulation chamber, a chemical absorption pool, an ecological pool, a carbon dioxide monitoring module, a pH measurement module, and a data processing module. The atmospheric environment simulation chamber is a sealed chamber structure with windows; The ecological pool is located inside the atmospheric simulation chamber; The chemical absorption cell is located inside the atmospheric simulation chamber, and a semiconductor cooling chip is installed inside the chemical absorption cell. The carbon dioxide monitoring module includes an infrared sensing unit, a gas sampling unit, and a signal preprocessing unit; The pH measurement module is located inside the chemical absorption cell and includes a microelectrode detection unit, a signal amplification unit, a calibration unit, and a pH indicator module. The data processing module includes a microcontroller, a data storage unit, and a communication unit; The carbon dioxide monitoring module, pH measurement module, and data processing module are interconnected through an interface to form a closed-loop control system, which is located inside the atmospheric environment simulation chamber.

2. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, The infrared sensing unit is configured with a 14.2μm wavelength carbon dioxide characteristic absorption spectrum emitter and photodetector, and adopts a CM1109 dual-source sensor chip. The gas sampling unit is equipped with a miniature vacuum pump and a gas filter membrane. The flow rate of the miniature vacuum pump is 10-50mL / min, and the pore size of the gas filter membrane is 0.22μm. The signal preprocessing unit includes a lock-in amplifier circuit and a temperature compensation module.

3. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, The microelectrode detection unit uses an IrO2 solid-state sensitive membrane. The calibration unit has a built-in two-point calibration program that automatically calibrates using standard buffer solutions at pH 4.01, pH 6.86, and pH 9.18, with a calibration cycle of 24 hours. The pH indicator module contains a variety of indicators for visualizing the CO2 absorption process.

4. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, The microcontroller of the data processing module uses an ARM Cortex-M4 core with a sampling frequency of 10 Hz. The data storage unit has a capacity of more than 8 GB, and the communication unit supports USB, Bluetooth and Wi-Fi protocols.

5. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, It also includes a feedback regulation module, which comprises a gas regulation unit, a light regulation unit, and a water quality regulation unit. The gas regulation unit includes a carbon dioxide adsorbent storage chamber and a make-up air pump. The adsorbent in the carbon dioxide adsorbent storage chamber is soda lime. The flow rate of the make-up air pump is 10-50 mL / min. The light regulation unit uses a combination of red and blue LED light sources with a light quality ratio of 3:1 and a light intensity that is continuously adjustable from 0 to 10000 lux. The water quality regulation unit includes a pH buffer storage chamber and a metering injection pump.

6. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, It also includes a power supply module, which uses either a lithium battery or a solar panel for power supply, either alone or in combination.

7. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, It also includes an auxiliary monitoring module, which includes a fluorescence dissolved oxygen sensor, a DS18B20 temperature sensor, and a conductivity sensor.

8. The micro-simulation system with carbon dioxide concentration monitoring and pH measurement device according to claim 1, characterized in that, The atmospheric environment simulation chamber is equipped with a gas circulation pump, which is connected to the chemical absorption tank.

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