Animal multi-mode experiment control system for controlling concentration of hydrogen and oxygen

Abstract

The utility model provides an animal multi-mode experiment control system for controlling the concentration of hydrogen and oxygen. The animal multi-mode experiment control system comprises an integrated sensor module, a gas concentration control system and a user interface. The sensor module monitors the temperature, the humidity, the hydrogen concentration and the oxygen concentration in the experiment module in real time and feeds back the data to the gas concentration control system, the actual flow value and the set flow value are compared through the central control PCB according to flow information provided by the float flowmeter, the opening degree of the valve is automatically adjusted, and the gas concentration is controlled. And the concentration of hydrogen and oxygen in the experiment module is maintained in a preset range. The high-precision sensor module provided by the utility model can accurately capture key parameter changes. A PID algorithm is adopted for gas concentration control, a float flowmeter and an automatic regulating valve are combined, the concentration control precision within + / -1% is achieved, and the high-precision experiment requirement is met. According to the utility model, a stable and accurate hydrogen and oxygen concentration management scheme is provided for animal experiments, and the controllability and data reliability of the experiments are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of biomedical research equipment, specifically to an animal multi-mode experimental control system for controlling the concentration of hydrogen and oxygen. Background Technology

[0002] In the fields of modern industrial and agricultural production and environmental simulation, the precise control of dynamic gas environments has become a core factor affecting the efficiency of bioculture and product quality. Especially in microbial fermentation, industrialized plant cultivation, and the preparation of special materials, the synergistic control of multiple reactive gases (such as ozone, carbon dioxide, and inert gases) not only relates to bioactive metabolic pathways but also directly affects product synthesis efficiency and system energy consumption. Studies have shown that when the gas concentration gradient in the reaction system is optimally coupled with temperature and humidity parameters, the energy conversion efficiency of photobioreactors can be increased by more than 40%.

[0003] Current mainstream gas control devices generally suffer from technical defects related to multi-dimensional control imbalance. Traditional PID control models struggle to achieve dynamic balance of multi-gas component concentrations in complex gas path systems with nonlinearity and large time lag, often leading to periodic oscillations in the culture environment. Existing devices mostly employ a split sensor layout, resulting in monitoring blind spots exceeding 25% and lacking the ability to compensate for local microenvironmental heterogeneity. A more prominent contradiction lies in the fact that traditional control strategies do not consider the synergistic / antagonistic effects between different gas components. For example, excessive ozone concentration significantly inhibits the assimilation rate of carbon dioxide, while existing systems can only achieve threshold alarms for a single gas, failing to construct a multi-parameter coupled intelligent decision-making model. Furthermore, the fixed gas supply pipeline design results in persistently high energy consumption; experimental data shows that the ineffective energy consumption of conventional systems under no-load conditions accounts for more than 30% of the total power consumption.

[0004] Given the aforementioned limitations, it is particularly important to develop a multi-mode experimental control system for animals that can achieve high precision, rapid response, and easy operation of hydrogen and oxygen control functions. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide an animal multi-mode experimental control system for controlling the concentration of hydrogen and oxygen.

[0006] According to the present invention, a multi-mode experimental control system for controlling hydrogen and oxygen concentrations in animals is provided, characterized in that it includes: a sensor module, a gas concentration control system, and a user interface; the sensor module is connected to the gas concentration control system.

[0007] The gas concentration control system includes: a touch screen, an oxygen float flow meter, a nitrogen float flow meter, a hydrogen float flow meter, a sensor interface, an oxygen animal experimental chamber interface, a nitrogen animal experimental chamber interface, a hydrogen animal experimental chamber interface, an oxygen gas cylinder interface, a nitrogen gas cylinder interface, a hydrogen gas cylinder interface, and a central control PCB. The sensor interface, oxygen animal experimental chamber interface, nitrogen animal experimental chamber interface, and hydrogen animal experimental chamber interface are connected to experimental chambers. The oxygen gas cylinder interface is connected to an oxygen gas cylinder. The nitrogen gas cylinder interface is connected to a nitrogen gas cylinder. The hydrogen gas cylinder interface is connected to a hydrogen mixed gas cylinder. The touch screen serves as the operating interface, allowing for parameter setting and monitoring parameter display. The central control PCB collects data from various sensors in the system and connects to various solenoid valves. Feedback control is performed based on the data read from the sensors.

[0008] Preferably, the experimental chamber includes an oxygen inlet, a nitrogen inlet, a mixed gas inlet, and a sensor module; the oxygen inlet is connected to the oxygen animal experimental chamber interface, the nitrogen inlet is connected to the nitrogen animal experimental chamber interface, the mixed gas inlet is connected to the mixed gas animal experimental chamber interface, and the sensor module is connected to the sensor interface.

[0009] The oxygen inlet introduces the gas output from the controller into the experimental chamber; the nitrogen inlet introduces the gas output from the controller into the experimental chamber; the mixed gas inlet introduces the gas output from the controller into the experimental chamber; the sensor module integrates temperature, humidity, oxygen, CO2, and hydrogen sensor modules, which are connected to the host controller via RS232 communication to upload the measured signals to the host. It includes: sensor modules, a gas concentration control system, and a user interface; the sensor modules are connected to the gas concentration control system.

[0010] Preferably, the sensor module includes a zirconium dioxide oxygen sensor and a carbon dioxide sensor, wherein the zirconium dioxide oxygen sensor has a range of 0.1% to 25% and an accuracy of 0.1%, and the carbon dioxide sensor uses the infrared (IR) principle for testing, with a range of 0% to 5% and an accuracy of 1%.

[0011] Preferably, the user interface has a real-time monitoring mode, a constant mode, an intermittent mode, and a multi-segment mode; the real-time monitoring mode can monitor changes in cabin temperature, humidity, oxygen concentration, carbon dioxide concentration, and hydrogen concentration in real time; the constant mode allows users to freely set the target gas concentration and duration; the intermittent mode allows users to set high and low oxygen concentrations and times, as well as the experiment duration; the multi-segment mode allows users to set up more than 5 segments of high and low oxygen and time-sequential experiments or cyclical alternation experiments.

[0012] The user interface also features an automatic calibration function, capable of calibrating carbon dioxide and oxygen concentrations.

[0013] Preferably, the system also includes a safety protection system equipped with an audible and visual alarm. When it detects "oxygen concentration too low", "carbon dioxide concentration too high", "temperature too high", "humidity too high" or "hydrogen concentration too high", it will emit a buzzer to alert the user and can automatically stop working.

[0014] Preferably, the valve in the gas concentration control system is a continuously adjustable valve, and the internal actuator is a stepper motor or servo motor, which provides angle control and realizes flow regulation, with an adjustment accuracy of within ±1%.

[0015] Preferably, the main touchscreen interface of the user interface has modules for "real-time monitoring", "constant mode", "intermittent mode", "multi-segment mode" and "hydrogen mode", and researchers can enter the corresponding settings interface according to experimental needs.

[0016] Preferably, the system further includes a parameter setting interface, which can set mode selection, circulation filtration and safety option parameters. The circulation filtration can set the air exchange frequency, duration, carbon dioxide concentration and working mode. The safety options can set alarm thresholds for oxygen, carbon dioxide, temperature and humidity.

[0017] The system connects to the host controller via an integrated sensor module using RS232 communication, uploading the measured signals to the host to achieve real-time data acquisition and processing.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The data acquisition system of this utility model has an appropriate sampling frequency to ensure timeliness. After the raw signal is filtered and converted, it is transmitted to the central monitoring system in real time through a wired network to achieve rapid response. The control system can automatically adjust the working status of ventilation, oxygen replenishment or carbon dioxide removal equipment according to the monitored data to maintain the stability of the cabin environment and ensure the continuity and reliability of experimental conditions.

[0020] 2. This utility model provides a user-friendly human-computer interaction interface, which allows researchers to easily set experimental conditions, monitor experimental progress, and record experimental data, reducing the difficulty of operation and improving work efficiency. The software has rich functions, including real-time monitoring mode, constant mode, intermittent mode, multi-segment mode, and hydrogen mode, which can meet different experimental needs and provide a suitable gas environment for the establishment of animal hypoxia, hyperxia, and intermittent oxygen experimental models.

[0021] 3. This utility model is equipped with an alarm protection device. When abnormal conditions occur in the experimental chamber, such as excessively low oxygen concentration, excessively high carbon dioxide concentration, excessively high temperature, excessively high humidity, or excessively high hydrogen concentration, the equipment will emit a buzzer to alert the user and automatically stop working to ensure the safety of personnel and equipment during the experiment. The system has an automatic calibration function, which can periodically calibrate the sensors to ensure the accuracy of the measurement data and further improve the reliability of the experiment.

[0022] 4. This utility model, through its dynamic programmable control system, offers diverse programming modes and enables intermittent alternating control experiments of hyperoxia and hypoxia. It is applicable to various experimental scenarios such as acute hypoxia experiments, chronic hypoxia experiments, and normoxic / hypoxic alternating experiments, thereby improving the flexibility and efficiency of experiments. It also provides a circulating filtration function, allowing users to set parameters such as ventilation frequency and duration as needed to further optimize the experimental environment and ensure the accuracy and repeatability of experimental results. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the system control principle of this utility model.

[0026] in:

[0027] Detailed Implementation

[0028] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0029] Example 1:

[0030] Reference Figure 1 and Figure 2This invention provides a multi-mode experimental control system for controlling hydrogen and oxygen concentrations in animals, characterized by comprising: a sensor module, a gas concentration control system, and a user interface; the sensor module is connected to the gas concentration control system; the gas concentration control system includes: a touch screen, an oxygen float flowmeter, a nitrogen float flowmeter, a hydrogen float flowmeter, a sensor interface, an oxygen animal experimental chamber interface, a nitrogen animal experimental chamber interface, a hydrogen animal experimental chamber interface, an oxygen gas cylinder interface, a nitrogen gas cylinder interface, a hydrogen gas cylinder interface, and a central control PCB; the sensor interface, oxygen animal experimental chamber interface, nitrogen animal experimental chamber interface, and hydrogen animal experimental chamber interface are connected to experimental chambers; the oxygen gas cylinder interface is connected to an oxygen gas cylinder; the nitrogen gas cylinder interface is connected to a nitrogen gas cylinder; the hydrogen gas cylinder interface is connected to a hydrogen mixed gas cylinder; the touch screen is the operating interface, used for parameter setting and monitoring parameter display; the central control PCB collects data from various sensors of the system and connects to various solenoid valves; and performs feedback control based on the data read by the sensors.

[0031] The experimental chamber includes an oxygen inlet, a nitrogen inlet, a mixed gas inlet, and a sensor module. The oxygen inlet is connected to an oxygen-based animal experimental chamber interface, the nitrogen inlet is connected to a nitrogen-based animal experimental chamber interface, the mixed gas inlet is connected to a mixed gas animal experimental chamber interface, and the sensor module is connected to a sensor interface. The oxygen inlet introduces the gas output from the controller into the experimental chamber; the nitrogen inlet introduces the gas output from the controller into the experimental chamber; and the mixed gas inlet introduces the gas output from the controller into the experimental chamber. The sensor module integrates temperature, humidity, oxygen, CO2, and hydrogen sensor modules, which are connected to the host controller via RS232 communication to upload the measured signals to the host. It includes: a sensor module, a gas concentration control system, and a user interface; the sensor module is connected to the gas concentration control system.

[0032] The sensor module includes a zirconium dioxide oxygen sensor and a carbon dioxide sensor. The zirconium dioxide oxygen sensor has a range of 0.1% to 25% and an accuracy of 0.1%. The carbon dioxide sensor uses the infrared (IR) principle for testing, with a range of 0% to 5% and an accuracy of 1%.

[0033] The user interface features real-time monitoring, constant mode, intermittent mode, and multi-segment mode. The real-time monitoring mode can monitor changes in cabin temperature, humidity, oxygen concentration, carbon dioxide concentration, and hydrogen concentration in real time. The constant mode allows users to freely set the target gas concentration and duration. The intermittent mode allows users to set high and low oxygen concentrations and times, as well as the experiment duration. The multi-segment mode allows users to set up to 5 or more segments of high and low oxygen and time-sequential experiments or cyclical alternation experiments. The user interface also has an automatic calibration function, capable of calibrating carbon dioxide and oxygen concentrations.

[0034] The system also includes a safety protection system with an audible and visual alarm. When it detects "too low oxygen concentration", "too high carbon dioxide concentration", "too high temperature", "too high humidity" or "too high hydrogen concentration", it will emit a buzzer to alert the system and can automatically stop working.

[0035] The valves in the gas concentration control system are continuously adjustable valves, with internal actuators consisting of stepper motors or servo motors, providing angle control and achieving flow regulation with an accuracy within ±1%. The user interface's touchscreen main interface includes modules for "Real-time Monitoring," "Constant Mode," "Intermittent Mode," "Multi-segment Mode," and "Hydrogen Mode," allowing researchers to access the corresponding settings interface based on experimental needs.

[0036] The system also includes a parameter setting interface, which allows users to set mode selection, circulation filtration, and safety options. The circulation filtration allows users to set the air exchange frequency, duration, carbon dioxide concentration, and operating mode. The safety options allow users to set alarm thresholds for oxygen, carbon dioxide, temperature, and humidity. The system connects to the host controller via an integrated sensor module using RS232 communication to upload measured signals to the host, enabling real-time data acquisition and processing.

[0037] Example 2:

[0038] This invention proposes a multi-mode experimental control system for animals with hydrogen and oxygen control functions, mainly comprising:

[0039] Sensor module: Equipped with a variety of sensors, it can monitor parameters such as temperature, humidity, hydrogen and oxygen concentration in the experimental chamber in real time and feed the data back to the float flow meter in the control system.

[0040] Zirconia oxygen sensor (range 0.1%~25%): accuracy 0.1%, installation method: mounted on the sub-board; carbon dioxide sensor uses infrared IR principle testing (range 0%~5%) with accuracy 1%, installation method: welded to the sub-board.

[0041] The digital signals output by the sensors are connected to a data acquisition system. This system has an appropriate sampling frequency to ensure timeliness. The raw signals from the sensors are typically filtered and then converted into a computer-readable format. The conditioned data is transmitted to a central monitoring system via a wired network. Upon receiving the data, the central monitoring system performs analysis and processing, including trend analysis and alarm settings. A real-time data display interface allows operators to monitor the situation inside the experimental chamber at any time. Based on the monitored data, the control system can automatically adjust the operating status of ventilation, oxygen replenishment, or carbon dioxide removal equipment to maintain a stable environment inside the chamber.

[0042] Gas concentration control system: Based on the flow rate provided by the float flow meter, the actual flow rate is compared with the set value through the central control PCB, and the valve opening is automatically adjusted to maintain a constant flow rate into the experimental chamber, thereby maintaining the hydrogen and oxygen concentrations in the experimental chamber within the set range.

[0043] The conversion principle of flow sensors:

[0044] Algorithm logic of the central control system:

[0045] Algorithm Structure: PID Controller: One of the most common control algorithms is Proportional-Integral-Derivative (PID) control. It calculates the appropriate control action based on the error between the current measured value and the setpoint. P (Proportional): Directly adjusts the control output according to the proportion of the error. I (Integral): Accumulates past errors to eliminate steady-state errors. D (Derivative): Predicts future trends, reducing overshoot and oscillations. The control system receives real-time data from the flow sensor, calculates the deviation between the actual flow rate and the setpoint, and then applies the PID algorithm to determine how the valve needs to be adjusted to minimize this deviation and maintain a constant flow rate.

[0046] Safety mechanisms: In addition to basic PID control, there should be additional safety measures, such as maximum / minimum valve opening limits and alarm threshold settings, to ensure the safety of the environment inside the experimental chamber even under extreme conditions.

[0047] Types and working principles of automatic regulating valves:

[0048] Valve type: Solenoid valve: This type of valve opens and closes quickly using the magnetic field generated by an electromagnetic coil. It is suitable for applications requiring rapid response but not for fine-tuning.

[0049] Working principle: When the control system determines that flow adjustment is needed, it sends a command to the valve (usually a 4-20mA current signal or a 0-10V voltage signal). Upon receiving the signal, the actuator inside the valve adjusts the opening according to a predetermined method. For continuously regulating valves, stepper motors or servo motors may be used, which provide precise angle control, thereby achieving high-precision flow regulation.

[0050] Adjustment accuracy: Accuracy range: The adjustment accuracy can reach within ±1%.

[0051] User interface: Provides a user-friendly interface that allows researchers to easily set experimental conditions, monitor experimental progress, and record experimental data.

[0052] Software features:

[0053] Real-time monitoring mode: Can monitor changes in cabin temperature, humidity, oxygen concentration, and carbon dioxide concentration in real time.

[0054] Constant mode: The target gas concentration and duration can be freely set.

[0055] Intermittent mode: Allows setting high and low oxygen concentrations and times, as well as the duration of the experiment.

[0056] Multi-segment mode: ≥5 segments, which can be set separately for high and low oxygen and time sequence experiments or cyclical alternation experiments.

[0057] It has multiple alarm functions: alarms for exceeding limits for oxygen concentration, carbon dioxide concentration, hydrogen concentration, temperature, humidity, etc.

[0058] It has an automatic protection function: after the experiment is completed, it automatically returns to the normal oxygen state and is accompanied by an audible prompt.

[0059] It has an automatic calibration function: it can perform carbon dioxide concentration calibration and oxygen concentration calibration.

[0060] This invention provides a suitable gaseous environment for establishing animal hypoxia, hyperxia, and intermittent oxygen experimental models. It can precisely control the changes in oxygen concentration within the animal chamber; automatically mixes gases according to a set concentration to maintain a constant oxygen concentration environment. There is no need to mix gases outside the chamber, ensuring stable experimental oxygen concentration. It features a dynamic programmable control system with ≥4 programming modes, enabling experiments involving alternating hyperxia and hypoxia, and allowing for acute hypoxia, chronic hypoxia, and normoxic / hypoxia alternation experiments.

[0061] This utility model is a powerful and easy-to-use operating system, including several main modules such as "real-time monitoring", "constant mode", "multi-segment mode", "intermittent mode" and "hydrogen mode", as well as two auxiliary modules: "system settings" and "about us".

[0062] Software Functional Mode Design: This utility model allows entry into the "Real-time Monitoring" mode in four ways: via the "Real-time Monitoring" module on the main touchscreen interface; via the "Real-time Monitoring" button in the lower right corner of the "Constant Mode Setting" interface; via the "Real-time Monitoring" button in the lower right corner of the "Intermittent Mode Setting" interface; and via the "Real-time Monitoring" button in the lower right corner of the "Multi-segment Mode Setting" interface. Real-time monitoring displays the temperature, humidity, oxygen, hydrogen concentration, and carbon dioxide concentration within the animal experimental chamber. The oxygen-time curve allows direct observation of real-time oxygen changes within the animal experimental chamber, enabling selection of the appropriate gas source based on actual conditions.

[0063] Constant Mode: Click the "Constant Mode" module on the main touchscreen interface to enter the "Constant Mode" settings interface, where you can set the "Target Concentration", "Interval Setting" and "Duration". "Run" and "STOP" can control the experimental process, and "Real-time Monitoring" and "Home" are also available.

[0064] The "Target Concentration" setting is used to set the target oxygen concentration. For example, if the target concentration is 1% for 10 minutes, you can set the concentration to 1% and the duration to 10 minutes. Then click the "Run" button. You will hear a clear "beep" sound, indicating that the command has started. You can observe the oxygen concentration trend in the "Real-time Monitoring" module. If an error occurs or an emergency occurs, click "STOP." You will hear a softer "beep" sound, indicating that the command control has stopped.

[0065] Intermittent Mode: Click the "Intermittent Mode" module on the main touchscreen interface to enter the "Intermittent Mode" settings interface. Here you can set the "Upper and Lower Limit Concentrations," their respective "Duration Times," and "Hold Time." Set the target oxygen concentration, such as 5%–10%, each lasting 55 seconds. You can set the upper limit concentration to 15%, the lower limit concentration to 5%, and the duration to 55 seconds for each, with a total duration of 1 day. After setting, click the "Run" button. A clear "beep" sound indicates the command has started, and you can observe the oxygen concentration trend in the "Real-time Monitoring" module. If an error occurs or a sudden situation arises, click "STOP." A softer "beep" sound indicates the command control has stopped.

[0066] Multi-segment mode: Click the "Multi-segment mode" module on the main touchscreen interface to enter the "Multi-segment mode" settings interface, where you can set the "target oxygen concentration" and "duration," as well as select the mode. Set the target oxygen concentration, for example, the first segment's target concentration is 5% and lasts for 55 seconds, the second segment's concentration is 15% and lasts for 30 seconds. If you need to cycle through the first and second stages, check "Cycle mode"; otherwise, check "Sequential mode." After setting, click the "Run" button. You will hear a clear "beep" sound, indicating that the command has started. You can observe the oxygen concentration change trend in the "Real-time monitoring" module. If the program encounters an error or an emergency, click "STOP." You will hear a softer "beep" sound, indicating that the command control has stopped.

[0067] Hydrogen Mode: Click the "Hydrogen Mode" module on the main touchscreen interface to enter the "Hydrogen Mode" settings interface, where you can set the "Target Hydrogen Concentration," "Intermittent Setting," "Oxygen Concentration," and duration. For example, set the hydrogen concentration to 1%, the intermittent setting to 0.3%, the oxygen concentration to 10%, and the duration to 10 minutes. When the hydrogen concentration reaches 0.7%, continuous gas intake will stop, and intermittent gas intake will begin. After setting, click the "Run" button. A clear "beep" sound indicates the command has started, and you can observe the trend of each concentration in the "Real-time Monitoring" module. If an error occurs or an emergency occurs, click "STOP." A softer "beep" sound will be heard, and the command control will stop.

[0068] Software operation process:

[0069] Parameter settings: Click the "Parameters" module on the main touch screen interface to enter the parameter settings interface, where you can set "Mode Selection", "Loop Filtering", "Security Options" and view alarm records.

[0070] Mode Selection: Select the appropriate mode based on the connected gas source. For example, if using a gas cylinder, check the box next to O2 cylinder mode. Circulation Filtration: Set the "Ventilation Frequency," "Duration," "CO2 Concentration," and operating mode. Click "Start" to activate.

[0071] Safety options: You can set "O2 concentration too low", "CO2 concentration too high", "temperature too high", "humidity too high" and "H2 concentration too high". When the corresponding alarm button is selected, a buzzer will sound when the set alarm value is reached. When the protection button is selected, the system will automatically stop working when the set alarm value is reached. You can set these options according to your specific requirements.

[0072] View alarm logs: Click to view alarm logs to see the "Trigger Event," "Alarm Time," and "Release Time." Click the "Clear" button to clear the alarm log. Create a task and initialize task properties.

[0073] Equipment Calibration: When the detected gas concentration deviates from the actual gas concentration, you can access the "System Settings" module on the main touchscreen interface and click "Equipment Calibration" to perform calibration. In this mode, you can select "Zero Point Calibration" and "Amplitude Calibration". You can manually enter the corresponding value according to the measured oxygen concentration and click "Calibrate" after "Amplitude Calibration".

[0074] Safety Protection System: Equipped with an alarm protection device to ensure the safety of personnel and equipment during experiments. Type: Audible and visual alarm; Triggering conditions: Options can be set for "Oxygen concentration too low", "Carbon dioxide concentration too high", "Temperature too high", "Humidity too high", "Hydrogen concentration too high", etc.; Alarm method: The device will emit a buzzer sound; Safety protection measures: Automatic shutdown.

[0075] Through the above technical solution, this invention enables precise control of hydrogen and oxygen concentrations within the experimental chamber, while providing a good user experience and ensuring safety, greatly improving the reliability and efficiency of the experiment. Throughout the experiment, the environmental monitoring module continuously monitors various indicators, while the automatic adjustment module dynamically adjusts based on actual measurements to ensure the stability of experimental conditions. Furthermore, researchers can view the experimental progress at any time through the user interface and intervene when necessary.

[0076] Gas concentration controller: The main controller of the system, which monitors and controls the gas concentration.

[0077] Touchscreen: The user interface, used for setting and displaying monitoring parameters.

[0078] Oxygen float flow meter: used for monitoring and regulating the flow rate of oxygen gas.

[0079] Nitrogen float flow meter: used for monitoring and regulating the flow of nitrogen gas.

[0080] Hydrogen float flow meter: used for flow monitoring and regulation control of hydrogen and mixed gases.

[0081] Sensor interface: Used to connect sensor module 21, typically using an aviation connector.

[0082] Oxygen Animal Experiment Chamber Interface: Controlled oxygen is output from the controller and introduced into the experimental chamber.

[0083] Nitrogen Animal Experiment Chamber Interface: Controlled nitrogen gas is output from the controller and introduced into the experimental chamber.

[0084] Hydrogen (mixed gas) animal experimental chamber interface: Controlled hydrogen gas is output from the controller and introduced into the experimental chamber.

[0085] Oxygen Cylinder Interface: The oxygen in the oxygen cylinder, after being depressurized, is connected to this interface to supply power to the controller.

[0086] Nitrogen Cylinder Interface: Nitrogen gas from the cylinder, after being depressurized, is connected to this interface and supplied to the controller.

[0087] Hydrogen (mixed gas) cylinder interface: The hydrogen gas in the hydrogen cylinder, after being depressurized, is connected to this interface to supply the controller.

[0088] Central control PCB: Acquires data from various sensors in the system and connects to each solenoid valve. Feedback control is performed based on the data read from the sensors.

[0089] Hydrogen-mixed gas cylinder: An external gas cylinder with a pressure reducing valve.

[0090] Nitrogen gas cylinder: An external gas cylinder with a pressure reducing valve.

[0091] Oxygen gas cylinder: An external gas cylinder with a pressure reducing valve.

[0092] Experimental chamber: The chamber where experiments are conducted, which can hold laboratory animals or other experimental materials.

[0093] Oxygen Inlet: Introduces the gas output from the controller into the experimental chamber.

[0094] Nitrogen inlet: Introduces the gas output from the controller into the experimental chamber.

[0095] Mixed gas inlet: Introduces the gas output from the controller into the experimental chamber.

[0096] Sensor module: An integrated temperature, humidity, oxygen, CO2, and hydrogen sensor module, which connects to the host controller via RS232 communication and uploads the measured signals to the host.

[0097] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0098] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this utility model in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, enabling the system and its various devices, modules, and units to function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this utility model can be considered a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered both software modules implementing the method and structures within the hardware component.

[0099] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An animal multi-modal experimental control system for controlling hydrogen and oxygen concentrations, characterized by, The system comprises a sensor module, a gas concentration control system and a user interface. The sensor module is connected to the gas concentration control system. The gas concentration control system comprises a touch screen, an oxygen float flow meter, a nitrogen float flow meter, a hydrogen float flow meter, a sensor interface, an oxygen animal experiment cabin interface, a nitrogen animal experiment cabin interface, a hydrogen animal experiment cabin interface, an oxygen gas cylinder interface, a nitrogen gas cylinder interface, a hydrogen cylinder interface and a central control PCB. The sensor interface, the oxygen animal experiment cabin interface, the nitrogen animal experiment cabin interface and the hydrogen animal experiment cabin interface are connected to an experiment cabin.

2. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The oxygen gas cylinder interface is connected to an oxygen gas cylinder. The nitrogen gas cylinder interface is connected to a nitrogen gas cylinder.

3. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The hydrogen cylinder interface is connected to a hydrogen mixed gas cylinder.

4. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The touch screen is an operation interface for parameter setting and parameter display. The central control PCB collects data from each sensor of the system and connects each electromagnetic valve.

5. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The system is feedback controlled based on the data collected by the sensors. The experiment cabin comprises an oxygen inlet, a nitrogen inlet, a mixed gas inlet and a sensor module. The oxygen inlet is connected to the oxygen animal experiment cabin interface. The nitrogen inlet is connected to the nitrogen animal experiment cabin interface. The mixed gas inlet is connected to the mixed gas animal experiment cabin interface. The sensor module is connected to the sensor interface. The oxygen inlet, the nitrogen inlet and the mixed gas inlet are connected to the experiment cabin body. The sensor module comprises a zirconium dioxide oxygen sensor and a carbon dioxide sensor. The zirconium dioxide oxygen sensor has a range of 0.1% to 25% and an accuracy of 0.1%. The carbon dioxide sensor uses infrared IR principle for testing and has a range of 0% to 5% and an accuracy of 1%. The user interface has a real-time monitoring mode, a constant mode, an intermittent mode and a multi-segment mode. The real-time monitoring mode can monitor the temperature, humidity, oxygen concentration, carbon dioxide concentration and hydrogen concentration in the cabin in real time. The constant mode can freely set the target gas concentration and the duration. The intermittent mode can set the high and low oxygen concentrations and the time, respectively, and set the experiment duration. The multi-segment mode can set more than five high and low oxygen concentrations and time sequence experiments or cyclic alternating experiments. The user interface also has an automatic calibration function and can calibrate the carbon dioxide concentration and the oxygen concentration. The system also comprises a safety protection system with an audible and visual alarm. When the oxygen concentration is too low, the carbon dioxide concentration is too high, the temperature is too high, the humidity is too high or the hydrogen concentration is too high, the system will emit a beeping sound and can automatically stop working.

6. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The valve in the gas concentration control system adopts a continuous adjustment type valve, the internal actuator is a stepper motor or a servo motor, angle control is provided, flow regulation is realized, and the regulation accuracy can reach within ±1%.

7. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The touch screen main interface in the user interface is provided with "real-time monitoring", "constant mode", "intermittent mode", "multi-section mode" and "hydrogen mode" modules, and researchers enter the corresponding setting interface according to experimental requirements.

8. The animal multi-modal experimental control system for controlling concentrations of hydrogen and oxygen gas of claim 1, wherein, The system also includes a parameter setting interface, which can set mode selection, cycle filtration and safety option parameters, the cycle filtration can set ventilation frequency, duration, carbon dioxide concentration and working mode, and the safety option can set oxygen, carbon dioxide, temperature and humidity alarm thresholds; The system is connected with the host controller through the integrated sensor module in an RS232 communication mode, uploads the measured signals to the host, and realizes real-time acquisition and processing of data.

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