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

Abstract

The invention provides an animal multi-mode experiment control system for controlling the concentration of hydrogen and oxygen, 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 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 invention, 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] The present invention relates to the technical field of biomedical research equipment, and specifically, to an animal multi-mode experimental control system for controlling the concentrations of hydrogen and oxygen. Background Art

[0002] In biomedical research, precise control of the experimental environment is a key factor in ensuring the accuracy and repeatability of experimental results. Especially in research on exploring the physiological effects of gas concentration changes on animals, such as the fine regulation of hydrogen and oxygen concentrations, it can significantly affect the metabolism, immune response, and various other physiological processes of animals. Therefore, it is particularly important to construct a system that can stably and precisely control the gas concentration in the experimental chamber.

[0003] However, the existing experimental control systems have obvious limitations in controlling the hydrogen and oxygen concentrations. On the one hand, the control accuracy of these systems often fails to meet the requirements of high-precision experiments, resulting in experimental results that may be interfered by environmental fluctuations. On the other hand, the slow response speed is also a major drawback of the existing systems, which limits the ability to quickly respond to and adjust gas concentration changes during the experiment. In addition, the operational complexity is also an issue that cannot be ignored. The cumbersome operation process not only increases the workload of experimental personnel but also may introduce human operation errors, further affecting the accuracy and reliability of the experiment.

[0004] In view of the above limitations, it is particularly important to develop an animal multi-mode experimental control system with high-precision, fast-response, and easy-to-operate hydrogen and oxygen control functions. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide an animal multi-mode experimental control system for controlling the concentrations of hydrogen and oxygen.

[0006] An animal multi-mode experimental control system for controlling the concentrations of hydrogen and oxygen according to the present invention 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 sensor module is used to monitor the temperature, humidity, hydrogen, and oxygen concentrations in the experimental chamber in real time and feed the data back to the gas concentration control system;

[0008] The gas concentration control system receives the data from the sensor module, compares the actual flow rate with the set value according to the flow rate information provided by the rotameter, and automatically adjusts the opening degree of the valve to keep the hydrogen and oxygen concentrations in the experimental chamber within the set range;

[0009] The user interface provides a human-machine interaction interface, allowing researchers to set experimental conditions, monitor the experimental process, and record experimental data.

[0010] Preferably, the sensor module includes a zirconia oxygen sensor and a carbon dioxide sensor. The measurement range of the zirconia oxygen sensor is 0.1% to 25%, and the accuracy is 0.1%. The carbon dioxide sensor uses the infrared IR principle for testing, with a measurement range of 0% to 5% and an accuracy of 1%.

[0011] Preferably, the gas concentration control system adopts a PID controller algorithm. According to the deviation between the actual flow rate and the set value, the valve is adjusted to minimize the deviation and maintain a constant flow rate.

[0012] 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 the changes in the temperature, humidity, oxygen concentration, carbon dioxide concentration, and hydrogen concentration in the chamber in real time. The constant mode can freely set the target gas concentration and duration. The intermittent mode can separately set the high and low oxygen concentrations and time, and set the experimental duration. The multi-segment mode can set high and low oxygen and time sequence experiments or cyclic alternating experiments with 5 or more segments.

[0013] The user interface also has an automatic calibration function, which can perform carbon dioxide concentration calibration and oxygen concentration calibration.

[0014] Preferably, the system also includes a safety protection system equipped with an audible and visual alarm. When "low oxygen concentration", "high carbon dioxide concentration", "high temperature", "high humidity", or "high hydrogen concentration" is detected, it will emit a beeping sound for reminder and can choose to stop working automatically.

[0015] Preferably, the valve in the gas concentration control system is a continuously adjustable valve, and the internal actuator is a stepper motor or a servo motor, providing angle control to achieve flow regulation, and the regulation accuracy can reach within ±1%.

[0016] Preferably, the touch screen main interface in the user interface is provided with "Real-time Monitoring", "Constant Mode", "Intermittent Mode", "Multi-segment Mode", and "Hydrogen Mode" modules, and researchers can enter the corresponding setting interfaces according to experimental requirements.

[0017] Preferably, the system also includes a parameter setting interface, which can set parameters such as mode selection, cycle filtration, and safety options. The cycle filtration can set the ventilation frequency, duration, carbon dioxide concentration, and working mode. The safety options can set the alarm thresholds for oxygen, carbon dioxide, temperature, and humidity.

[0018] The system is connected to the host controller through the integrated sensor module using the RS232 communication method, and uploads the measured signals to the host to achieve real-time acquisition and processing of data.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By equipping with high-precision sensor modules (such as zirconia oxygen sensors and carbon dioxide sensors), the present invention can real-time monitor key parameters such as temperature, humidity, hydrogen and oxygen concentrations in the experimental chamber to ensure the accuracy of data; the gas concentration control system adopts the PID control algorithm, combined with a rotameter and an automatic regulating valve, which can achieve precise control of hydrogen and oxygen concentrations, and the adjustment accuracy can reach within ±1%, meeting the requirements of high-precision experiments;

[0021] 2. The present invention provides a friendly human-machine interface. Researchers can easily set experimental conditions, monitor the experimental process and record experimental data, reducing the operation difficulty and improving work efficiency; the software has rich functions, including real-time monitoring mode, constant mode, intermittent mode, multi-segment mode and hydrogen mode, etc., which can meet different experimental needs and provide a suitable gas environment for the establishment of animal hypoxic, hyperoxic and intermittent oxygen experimental models;

[0022] 3. The present invention is provided with an alarm protection device. When abnormal situations such as too low oxygen concentration, too high carbon dioxide concentration, too high temperature, too high humidity or too high hydrogen concentration occur in the experimental chamber, the device will emit a beeping sound to prompt and automatically stop working to ensure the safety of personnel and equipment during the experiment; the system has an automatic calibration function, which can regularly calibrate the sensors to ensure the accuracy of the measured data and further improve the reliability of the experiment;

[0023] 4. Through the dynamic programmable control system, the present invention has various programming modes, and can realize high-oxygen and hypoxic intermittent alternating control experiments, which are applicable to various experimental scenarios such as acute hypoxia experiments, chronic hypoxia experiments, normoxia / hypoxia alternating experiments, etc., improving the flexibility and efficiency of the experiment; it also provides a circulation filtration function, and parameters such as ventilation frequency and duration can be set according to needs to further optimize the experimental environment and ensure the accuracy and repeatability of experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, other features, objects and advantages of the present invention will become more apparent:

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic system control diagram of the present invention.

[0027] Wherein:

[0028] Gas concentration control system 1 Nitrogen gas cylinder interface 11

[0029] Touch screen 2 Mixed gas cylinder interface 12

[0030] Oxygen rotameter 3 Central control PCB 13

[0031] Nitrogen rotameter 4 Hydrogen mixed gas cylinder 14

[0032] Hydrogen rotameter 5 Nitrogen gas cylinder 15

[0033] Sensor interface 6 Oxygen gas cylinder 16

[0034] Oxygen animal experiment chamber interface 7 Experiment chamber 17

[0035] Nitrogen animal experiment chamber interface 8 Oxygen inlet 18

[0036] Mixed gas animal experiment chamber interface 9 Nitrogen inlet 19

[0037] Oxygen gas cylinder interface 10 Mixed gas inlet 20

[0038] Sensor module 21 Detailed implementation manners

[0039] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0040] Example 1:

[0041] Referring to Figure 1 and Figure 2 , according to an animal multi-mode experiment control system for controlling the concentrations of hydrogen and oxygen provided by the present invention, 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; the sensor module is used to monitor the temperature, humidity, hydrogen and oxygen concentrations in the experiment chamber in real time, and feed back the data to the gas concentration control system; the gas concentration control system receives the data from the sensor module, compares the actual flow rate with the set value according to the flow information provided by the rotameter, and automatically adjusts the opening degree of the valve to keep the hydrogen and oxygen concentrations in the experiment chamber within the set range; the user interface provides a man-machine interaction interface, allowing researchers to set experimental conditions, monitor the experimental process and record experimental data.

[0042] The sensor module includes a zirconia oxygen sensor and a carbon dioxide sensor. The measurement range of the zirconia oxygen sensor is 0.1% - 25%, and the accuracy is 0.1%. The carbon dioxide sensor uses the infrared IR principle for measurement, with a measurement range of 0% - 5% and an accuracy of 1%.

[0043] The gas concentration control system adopts the PID controller algorithm. According to the deviation between the actual flow rate and the set value, the valve is adjusted to minimize the deviation and keep the flow rate constant. The user interface has real-time monitoring mode, constant mode, intermittent mode, and multi-segment mode. The real-time monitoring mode can monitor the changes in the temperature, humidity, oxygen concentration, carbon dioxide concentration, and hydrogen concentration in the chamber in real time. The constant mode can freely set the target gas concentration and duration. The intermittent mode can separately set the high and low oxygen concentrations and time, and set the experimental duration. The multi-segment mode can set high and low oxygen and time sequence experiments or cyclic alternating experiments with 5 or more segments. The user interface also has an automatic calibration function, which can perform carbon dioxide concentration calibration and oxygen concentration calibration.

[0044] The system also includes a safety protection system equipped with an audible and visual alarm. When "low oxygen concentration", "high carbon dioxide concentration", "high temperature", "high humidity", or "high hydrogen concentration" is detected, it will emit a beeping sound for reminder and can choose to stop working automatically.

[0045] The valve in the gas concentration control system adopts a continuously adjustable valve, and the internal actuator is a stepper motor or a servo motor, providing angle control to achieve flow regulation, and the regulation accuracy can reach within ±1%. The touch screen main interface in the user interface has modules such as "real-time monitoring", "constant mode", "intermittent mode", "multi-segment mode", and "hydrogen mode". Researchers can enter the corresponding setting interfaces according to experimental requirements.

[0046] The system also includes a parameter setting interface, which can set parameters such as mode selection, cycle filtration, and safety options. The cycle filtration can set the ventilation frequency, duration, carbon dioxide concentration, and working mode. The safety options can set the alarm thresholds for oxygen, carbon dioxide, temperature, and humidity. The system is connected to the host controller through the integrated sensor module using the RS232 communication method, and uploads the measured signals to the host to achieve real-time data acquisition and processing.

[0047] Example 2:

[0048] The present invention proposes a multi-mode experimental control system for animals with hydrogen-oxygen control function, mainly including:

[0049] Sensor Module: Equipped with a variety of sensors, it can monitor parameters such as temperature, humidity, hydrogen and oxygen concentrations in the experimental chamber in real time, and feed the data back to the rotameter in the control system.

[0050] Zirconia oxygen sensor (range 0.1% - 25%): Accuracy 0.1%, installation method, installed on the daughter board; Carbon dioxide sensor uses infrared IR principle for testing (range 0% - 5%) with an accuracy of 1%, installation method, installed on the daughter board by welding.

[0051] 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 original signals from the sensors usually need to be filtered and then converted into a computer-readable form. The conditioned data is transmitted to the central monitoring system through a wired network. After receiving the data, the central monitoring system will perform analysis and processing, including functions such as trend analysis and alarm setting. The real-time data display interface allows the operator to understand the status in the experimental chamber at any time. According to the monitored data, the control system can automatically adjust the working states of the ventilation, oxygen supplementation or carbon dioxide removal equipment to maintain the stability of the environment in the chamber.

[0052] Gas Concentration Control System: According to the actual flow rate provided by the rotameter and compared with the set value through the central control PCB, it automatically adjusts the opening degree of the valve to keep the flow rate constantly input into the experimental chamber, so as to maintain the hydrogen and oxygen concentrations in the experimental chamber within the set range.

[0053] Conversion principle of the flow sensor:

[0054] Algorithm logic of the central control system:

[0055] Algorithm structure: PID controller: One of the most common control algorithms is the Proportional-Integral-Derivative (PID) control. It calculates an appropriate control action based on the error between the current measured value and the set value. 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 and reduces overshoot and oscillation. The control system receives real-time data from the flow sensor, calculates the deviation between the actual flow rate and the set value, and then applies the PID algorithm to determine how to adjust the valve to minimize this deviation and keep the flow rate constant.

[0056] Safety mechanism: In addition to the basic PID control, there should be additional safety measures, such as maximum / minimum valve opening limits, alarm threshold settings, etc., to ensure the environmental safety in the experimental chamber even in extreme cases.

[0057] Type and working principle of the automatic regulating valve:

[0058] Valve Type: Solenoid Valve: It quickly opens and closes the valve through the magnetic field generated by the electromagnetic coil. Suitable for applications that require quick response, but not suitable for fine adjustment.

[0059] Working Principle: When the control system decides that the flow rate needs to be adjusted, it sends a command to the valve (usually a 4 - 20 mA current signal or a 0 - 10 V voltage signal). After the actuator inside the valve receives the signal, it adjusts the opening degree in a predetermined manner. For continuously adjustable valves, stepper motors or servo motors may be used, which can provide precise angle control to achieve high-precision flow rate adjustment.

[0060] Adjustment Accuracy: Accuracy Range: The adjustment accuracy can reach within ±1%.

[0061] User Interface: Provides a friendly human-machine interaction interface, allowing researchers to easily set experimental conditions, monitor the experimental process, and record experimental data.

[0062] Software Functions:

[0063] Real-time Monitoring Mode: Can monitor the changes in the temperature, humidity, oxygen concentration, and carbon dioxide concentration inside the chamber in real time

[0064] Constant Mode: Can freely set the target gas concentration and duration

[0065] Intermittent Mode: Can separately set the high and low oxygen concentrations and time, and set the experimental duration

[0066] Multi-segment Mode: ≥5 segments, can separately set the high and low oxygen and time sequence experiments or cyclic alternating experiments.

[0067] Equipped with Multiple Alarm Functions: Alarm for overlimits of oxygen concentration, carbon dioxide concentration, hydrogen concentration, temperature, humidity, etc.

[0068] Equipped with Automatic Protection Function: After the experiment is completed, it automatically returns to the normal oxygen state and is accompanied by a sound prompt.

[0069] Equipped with Automatic Calibration Function: Can perform carbon dioxide concentration calibration and oxygen concentration calibration.

[0070] This invention has the function of providing a suitable gas environment for the establishment of animal hypoxic, hyperoxic, and intermittent oxygen experimental models, can precisely control the change of oxygen concentration in the animal chamber; automatically mixes gases according to the set gas concentration to maintain a constant oxygen concentration environment. There is no need to mix proportional gases outside the chamber to ensure the stability of the experimental oxygen concentration; it has a dynamic programmable control system, and the programming mode is ≥4 kinds, which can realize high-oxygen, hypoxic intermittent alternating control experiments, and can conduct acute hypoxia experiments, chronic hypoxia experiments, and normal oxygen / hypoxia alternating experiments.

[0071] The present invention is a powerful and easy-to-operate operating system, including several main modules such as "Real-time Monitoring", "Constant Mode", "Multi-stage Mode", "Intermittent Mode", and "Hydrogen Mode", and two auxiliary modules "System Settings" and "About Us".

[0072] Software function mode design: The present invention enters the "Real-time Monitoring" mode in four ways: entering through the "Real-time Monitoring" module on the main touch screen interface; entering through the "Real-time Monitoring" in the lower right corner of the "Constant Mode Settings" interface; entering through the "Real-time Monitoring" in the lower right corner of the "Intermittent Mode Settings" interface; entering through the "Real-time Monitoring" in the lower right corner of the "Multi-stage Mode Settings" interface. Real-time monitoring can display: the temperature, humidity, oxygen, hydrogen concentration, and carbon dioxide concentration in the animal experiment chamber. The oxygen-time curve can directly observe the real-time oxygen change in the animal experiment chamber, and the corresponding gas source can be selected according to the actual situation.

[0073] Constant mode: Click the "Constant Mode" module on the main touch screen interface to enter the "Constant Mode" settings interface, where "Target Concentration", "Intermittent Settings", and "Duration" can be set. "Run" and "STOP" can control the experimental process, as well as "Real-time Monitoring" and "Home Page".

[0074] The "Target Concentration" is used to set the target oxygen concentration. For example, if the target concentration is 1% for 10 minutes, the concentration can be set to 1% and the duration to 10 minutes. Then click the "Run" button, and when you hear a clear "te" sound, the command has been executed, and the oxygen concentration change trend can be observed in the "Real-time Monitoring" module. If an error or unexpected situation occurs in the program, click "STOP", and you will hear a relatively soft "te" sound, and the command control will stop.

[0075] Intermittent mode: Click the "Intermittent Mode" module on the main touch screen interface to enter the "Intermittent Mode" settings interface, where "upper and lower limit concentrations" and their respective "durations", as well as "holding time" can be set. Set the target oxygen concentration. For example, if the target concentration is 5% - 10% and each lasts for 55 seconds, the upper limit concentration can be set to 15%, the lower limit concentration to 5%, and the duration of both to 55 seconds, and the set duration is 1 day. After setting, click the "Run" button, and when you hear a clear "te" sound, the command has been executed, and the oxygen concentration change trend can be observed in the "Real-time Monitoring" module. If an error or unexpected situation occurs in the program, click "STOP", and you will hear a relatively soft "te" sound, and the command control will stop.

[0076] Multi-stage Mode: Click on the "Multi-stage Mode" module on the main touch screen interface to enter the "Multi-stage Mode" setting 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 target concentration for the first stage is 5% and it lasts for 55s, and the concentration for the second stage is 15% with a duration of 30s. If you need to cycle through the first and second stages, check the "Cycle Mode"; otherwise, check the "Sequential Mode". After setting, click the "Run" button. When you hear a clear "te" sound, the command has been executed, and you can observe the trend of oxygen concentration changes in the "Real-time Monitoring" module. If an error occurs in the program or an unexpected situation arises, you can click "STOP". When you hear a relatively soft "te" sound, the command control has stopped.

[0077] Hydrogen Mode: Click on the "Hydrogen Mode" module on the main touch screen interface to enter the "Hydrogen Mode" setting 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%, stop continuous gas intake and start intermittent gas intake. After setting, click the "Run" button. When you hear a clear "te" sound, the command has been executed, and you can observe the trend of each concentration change in the "Real-time Monitoring" module. If an error occurs in the program or an unexpected situation arises, you can click "STOP". When you hear a relatively soft "te" sound, the command control has stopped.

[0078] Software Operation Process:

[0079] Parameter Setting: Click on the "Parameters" module on the main touch screen interface to enter the parameter setting interface, where you can set the "Mode Selection", "Circulation Filtration", "Safety Options", and view the alarm records.

[0080] Mode Selection: You can select the corresponding mode according to the connected gas source. For example, if you are using a cylinder, put a √ after the cylinder mode. Circulation Filtration: You can set the "Ventilation Frequency", "Duration", "CO 2 Concentration", and working mode. Click to activate. 2 Concentration", working mode. Click to activate.

[0081] Safety Options: You can set the "O 2 Concentration Too Low", "CO 2 Concentration Too High", "Temperature Too High", "Humidity Too High", "H2 Concentration Too High". Select the corresponding alarm button. When the set alarm value is reached, a beeping sound will be emitted for notification. Select the protection button. When the set alarm value is reached, the work will automatically stop. You can set according to specific requirements.

[0082] View alarm records: Click to view the alarm records to view the "trigger event", "alarm time", and "clear time". Click the "Clear button" to clear the alarm records. Create a task and initialize the task properties.

[0083] Device calibration: When the detected gas concentration value deviates from the actual gas concentration value, you can enter the "System Settings" module on the touch screen main interface and click "Device 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".

[0084] Safety protection system: Equipped with an alarm protection device to ensure the safety of personnel and equipment during the experiment. Type: audible and visual alarm; Trigger conditions: options such as "low oxygen concentration", "high carbon dioxide concentration", "high temperature", "high humidity", "high hydrogen concentration" can be set; Alarm method: the device will emit a beeping sound; Safety protection measures: automatically stop working.

[0085] Through the above technical solutions, the present invention can achieve precise control of the hydrogen and oxygen concentrations in the experimental chamber, and at the same time has a good user experience and safety, greatly improving the reliability and efficiency of the experiment. During the entire experiment process, the environmental monitoring module continuously monitors various indicators, and the automatic adjustment module dynamically adjusts according to the actual measurement values to ensure the stability of the experimental conditions. In addition, through the user interface, researchers can view the experimental progress at any time and intervene when necessary.

[0086] Gas concentration controller: The main controller of the system control, monitors and controls the gas concentration

[0087] Touch screen: The operation interface, through which parameter settings and monitoring parameter displays are carried out by touching the screen

[0088] Oxygen rotameter: Used for the flow monitoring and adjustment control of oxygen gas

[0089] Nitrogen rotameter: Used for the flow monitoring and adjustment control of nitrogen gas

[0090] Hydrogen rotameter: Used for the flow monitoring and adjustment control of hydrogen and mixed gas

[0091] Sensor interface: Used to connect the sensor module 21, generally using an aviation plug

[0092] Oxygen animal experiment chamber interface: The controlled oxygen is output from the controller and introduced into the experiment chamber

[0093] Nitrogen animal experiment chamber interface: The controlled nitrogen is output from the controller and introduced into the experiment chamber

[0094] Hydrogen (mixed gas) animal experiment chamber interface: The controlled hydrogen is output from the controller and introduced into the experiment chamber. Oxygen gas cylinder interface: The oxygen in the oxygen gas cylinder is connected to this interface after decompression and introduced into the controller. Nitrogen gas cylinder interface: The nitrogen in the nitrogen gas cylinder is connected to this interface after decompression and introduced into the controller.

[0095] Hydrogen gas cylinder interface: The hydrogen in the hydrogen gas cylinder is connected to this interface after decompression and introduced into the controller.

[0096] Central control PCB: Collects data from various sensors of the system and connects to each solenoid valve. Performs feedback control based on the data read by the sensors.

[0097] Hydrogen mixed gas cylinder: An external gas cylinder with a pressure reducing valve.

[0098] Nitrogen gas cylinder: An external gas cylinder with a pressure reducing valve.

[0099] Oxygen gas cylinder: An external gas cylinder with a pressure reducing valve.

[0100] Experiment chamber: The chamber where the experiment is carried out. Experimental animals or other experimental materials can be placed inside.

[0101] Oxygen inlet: Introduces the gas output from the controller into the experiment chamber.

[0102] Nitrogen inlet: Introduces the gas output from the controller into the experiment chamber.

[0103] Mixed gas inlet: Introduces the gas output from the controller into the experiment chamber.

[0104] Sensor module: An integrated temperature, humidity, oxygen, CO 2 , hydrogen sensor module, connected to the host controller through RS232 communication and uploads the measured signals to the host.

[0105] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0106] Those skilled in the art know that, in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers, etc. to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a kind of hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structures within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as either software modules for implementing the method or structures within the hardware component.

[0107] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations, characterized in that: include: A sensor module, a gas concentration control system and a user interface; the sensor module is connected to the gas concentration control system; The sensor module is used to monitor the temperature, humidity, hydrogen and oxygen concentrations in the experimental chamber in real time, and feed the data back to the gas concentration control system; The gas concentration control system receives data from the sensor module, compares the actual flow rate with the set value through the central control PCB according to the flow information provided by the float flowmeter, and automatically adjusts the valve opening to keep the hydrogen and oxygen concentrations in the experimental chamber within the set range; The user interface provides a human-computer interaction interface, allowing researchers to set experimental conditions, monitor experimental progress and record experimental data.

2. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The sensor module comprises a zirconium dioxide oxygen sensor and a carbon dioxide sensor, wherein the zirconium dioxide oxygen sensor has a measuring range of 0.1% to 25% and an accuracy of 0.1%, and the carbon dioxide sensor is tested using the infrared IR principle, with a measuring range of 0% to 5% and an accuracy of 1%.

3. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The gas concentration control system adopts a PID controller algorithm to adjust the valve according to the deviation between the actual flow rate and the set value to minimize the deviation and keep the flow rate constant.

4. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The user interface has real-time monitoring mode, constant mode, intermittent mode and multi-stage mode; the real-time monitoring mode can monitor the changes in 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 duration; the intermittent mode can set high and low oxygen concentrations and time respectively, and set the experiment duration; the multi-stage mode can set more than or equal to 5 stages of high and low oxygen and time sequence experiments or cyclic alternation experiments; The user interface also has an automatic calibration function, and is capable of performing carbon dioxide concentration calibration and oxygen concentration calibration.

5. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The system also includes a safety protection system with an audible and visual alarm. When "oxygen concentration is too low", "carbon dioxide concentration is too high", "temperature is too high", "humidity is too high" or "hydrogen concentration is too high" is detected, a buzzer will sound to remind you and the system can choose to stop working automatically.

6. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The valve in the gas concentration control system is a continuously adjustable valve, and the internal actuator is a stepper motor or a servo motor, which provides angle control and realizes flow regulation, and the regulation accuracy can reach within ±1%.

7. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The touch screen main interface in the user interface is equipped with "real-time monitoring", "constant mode", "intermittent mode", "multi-stage mode" and "hydrogen mode" modules, and researchers enter the corresponding setting interface according to experimental requirements.

8. The animal multi-mode experimental control system for controlling hydrogen and oxygen concentrations according to claim 1, characterized in that: The system also includes a parameter setting interface, which can set mode selection, circulation filtering and safety option parameters. The circulation filtering can set the ventilation frequency, duration, carbon dioxide concentration and working mode. The safety option can set the alarm thresholds of oxygen, carbon dioxide, temperature and humidity; The system is connected to the host controller through the integrated sensor module using RS232 communication mode, and the measured signal is uploaded to the host to realize real-time data collection and processing.

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