High-precision oxygen concentration detection device used in pressure environment
By designing a compact oxygen concentration detection device, utilizing a solenoid valve to control gas flow and a 763nm laser from the TDLAS module, the problem of insufficient oxygen monitoring accuracy under pressure conditions was solved, achieving real-time, high-precision oxygen concentration detection.
Patent Information
- Application Number
- CN202520209552.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Existing technologies lack sufficient detection accuracy for oxygen monitoring devices under pressure, and traditional methods cannot detect oxygen concentration in real time with high precision.
It employs a compact oxygen concentration detection device, which includes a detection chamber, PCB mounting board, built-in power supply, CPU module, oxygen testing chamber and laser gas analysis module. It uses a solenoid valve to control gas flow and combines a temperature sensing module, humidity monitoring module, oxygen detection module and pressure sensing module. It performs high-precision detection through the 763nm laser of the TDLAS module.
It achieves real-time, high-precision detection of oxygen concentration under pressure, avoiding gas leakage and external gas interference, thus ensuring the accuracy and efficiency of the detection.
Smart Images
Figure CN223841774U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oxygen concentration detection technology under pressure, specifically a high-precision oxygen concentration detection device for use under pressure. Background Technology
[0002] Oxygen is an important component of Earth's atmosphere, making up about 21% of the air volume. As a colorless, tasteless, and odorless gas, oxygen is vital to life on Earth, participating in the respiration and energy production of most organisms. Chemically, oxygen is the eighth element in the periodic table. It is chemically reactive and can form compounds with many elements. Oxygen is gaseous under standard conditions, but it can be liquefied under low temperature or high pressure. Liquid oxygen (LOX) is pale blue and has a boiling point of about -183°C. It is an important component of rocket fuel. The freezing point of oxygen is about -218°C, and solid oxygen is a blue crystal.
[0003] Oxygen is a strong oxidizing agent that can accept electrons in reactions, a property that makes it play a key role in many chemical reactions, including combustion, corrosion and cellular respiration. Oxygen usually releases a lot of energy when it reacts with other substances, which is the basis for organisms to produce ATP (the energy currency of cells) [2]. In biology, oxygen is a key consumable in the process of cellular respiration. It is inhaled by organisms through respiration and used to oxidize organic matter and release energy, carbon dioxide and water. This process is the basis for the survival of multicellular organisms, enabling them to maintain complex life activities.
[0004] Oxygen detection methods include traditional chemical detection techniques, sensor detection techniques, electrochemical sensor detection techniques, and laser spectroscopy detection techniques. Traditional chemical detection techniques require sampling and analysis, and cannot detect concentration in real time. Metal oxide sensors calculate concentration based on the principle that the adsorption of the analyte gas changes the conductivity of the semiconductor; however, their stability is poor due to environmental factors and interfering gases, making them unsuitable for high-precision detection. Electrochemical sensor technology uses an electrochemical reaction between the analyte gas and an electrode for detection; however, the electrode is a consumable and needs periodic replacement. Laser spectroscopy detection technology is based on the gas's "fingerprint" characteristics, retrieving gas concentration by measuring parameters related to the spectral characteristics of the analyte gas. It has advantages such as high selectivity, high sensitivity, rapid response, non-invasiveness, and online monitoring, making it a mainstream technology in high-performance gas sensing research and application. However, current devices for monitoring oxygen under pressure conditions have certain limitations in detection accuracy. Therefore, an improved technology is urgently needed to address this problem in existing technologies. Utility Model Content
[0005] The purpose of this invention is to provide a compact device for real-time gas sampling and detection, with high accuracy and efficiency in oxygen detection under pressure, in order to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-precision oxygen concentration detection device for use under pressure, comprising an oxygen concentration detection device, wherein the oxygen concentration detection device is provided with a detection chamber, and a PCB mounting plate is provided on the inner side of the detection chamber. The PCB mounting plate is fixedly installed to the inside of the detection chamber with screws. The PCB mounting plate is provided with a built-in power supply, a CPU module, a capacitor, an oxygen detection chamber, and a calculation and analysis module.
[0007] The oxygen testing chamber is cylindrical, with an air inlet at one end. An electromagnetic valve is installed inside the air inlet. A temperature sensing module, a humidity monitoring module, an oxygen detection module, a pressure sensing module, and a laser gas analysis module are installed on the inner side wall of the oxygen testing chamber. A connecting air pipe is installed on the outer wall of the oxygen testing chamber, which is connected to the oxygen testing chamber. An electromagnetic valve is installed at the connection between the connecting air pipe and the oxygen testing chamber.
[0008] The testing chamber is equipped with a chamber body sealing cover, and a sealing ring is provided at the connection between the chamber body sealing cover and the opening of the testing chamber. An air pump is located in the center of the outside of the chamber body sealing cover, and the air pump is connected to the connecting air pipe by an air pipe.
[0009] Preferably, the outer wall of the testing chamber is provided with an air inlet, which is connected to the oxygen testing chamber, and a solenoid valve is provided at the connection between the air inlet and the oxygen testing chamber.
[0010] Preferably, the air pump has an air outlet on its outer side.
[0011] Preferably, the calculation and analysis module is equipped with a flow meter, an A / D conversion module, a microcontroller, a network module, a storage module, and an output module, and the calculation and analysis module is connected to the CPU module.
[0012] Preferably, the laser gas analysis module is a TDLAS module, and a 763nm laser is used as the module light source.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] (1) A solenoid valve is provided at the connection between the gas duct and the oxygen testing chamber. The solenoid valve at the connection between the gas duct and the oxygen testing chamber 11 controls the flow of gas inside the oxygen testing chamber. During the oxygen testing process inside the oxygen testing chamber, the solenoid valve is closed to prevent the gas being tested from being discharged. It also prevents external gas from affecting the gas being tested inside the oxygen testing chamber, thus ensuring the accuracy of oxygen monitoring inside the oxygen testing chamber.
[0015] (2) The oxygen concentration detection device is small in size, performs real-time sampling and detection of gas, and has high detection accuracy and efficiency for oxygen. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the oxygen concentration detection device of this utility model;
[0017] Figure 2 This is a schematic diagram of the internal components of the oxygen concentration detection device of this utility model;
[0018] Figure 3 This is a structural diagram of the internal structure of the oxygen testing chamber of this utility model;
[0019] Figure 4 This is a structural diagram of the internal structure of the oxygen testing chamber of this utility model.
[0020] In the diagram: 1. Oxygen concentration detection device; 2. Detection chamber; 3. Air inlet; 4. Chamber sealing cover; 5. Air pump; 6. Air outlet; 7. PCB mounting board; 8. Built-in power supply; 9. CPU module; 10. Capacitor; 11. Oxygen testing chamber; 12. Connecting air duct; 13. Temperature sensing module; 14. Humidity monitoring module; 15. Oxygen detection module; 16. Pressure sensing module; 17. Laser gas analysis module; 18. Calculation and analysis module. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4 This utility model provides a technical solution: a high-precision oxygen concentration detection device for use under pressure, including an oxygen concentration detection device 1, a detection chamber 2 on the oxygen concentration detection device 1, an air inlet 3 on the outer wall of the detection chamber 2, the air inlet 3 being connected to an oxygen testing chamber 11, and an electromagnetic valve being provided at the connection between the air inlet 3 and the oxygen testing chamber 11.
[0023] The inner side of the detection chamber 2 is equipped with a PCB mounting plate 7, which is fixed to the inside of the detection chamber 2 with screws. The PCB mounting plate 7 is equipped with a built-in power supply 8, a CPU module 9, a capacitor 10, an oxygen detection chamber 11, and a calculation and analysis module 18. The calculation and analysis module 18 is equipped with a flow meter, an A / D conversion module, a microcontroller, a network module, a storage module, and an output module. The calculation and analysis module 18 is connected to the CPU module 9. When the external power supply is interrupted, the built-in power supply 8 provides power to the entire oxygen concentration detection device 1, ensuring the normal operation of the oxygen concentration detection device 1 for a certain period of time and avoiding the impact of power supply problems on the entire oxygen detection process.
[0024] The oxygen testing chamber 11 is cylindrical, with an air inlet port at one end. An electromagnetic valve is installed inside the air inlet port. The internal sidewall of the oxygen testing chamber 11 is equipped with a temperature sensing module 13, a humidity monitoring module 14, an oxygen detection module 15, a pressure sensing module 16, and a laser gas analysis module 17. A connecting air pipe 12 is fitted to the outer wall of the oxygen testing chamber 11, connecting to the oxygen testing chamber 11. An electromagnetic valve is located at the connection point between the connecting air pipe 12 and the oxygen testing chamber 11. This electromagnetic valve controls the flow of gas inside the oxygen testing chamber 11. During oxygen detection inside the oxygen testing chamber 11, the electromagnetic valve closes to prevent the detected gas from escaping and to prevent external gases from affecting the gas being detected inside the oxygen testing chamber 11, thus ensuring the accuracy of oxygen monitoring inside the oxygen testing chamber 11.
[0025] The detection chamber 2 is equipped with a chamber body sealing cover 4. A sealing ring is provided at the connection between the chamber body sealing cover 4 and the opening of the detection chamber 2. An air pump 5 is provided in the center of the outside of the chamber body sealing cover 4. The air pump 5 is connected to the connecting air pipe 12 by an air pipe. An air outlet 6 is provided on the outside of the air pump 5. After the oxygen content in the gas inside the oxygen detection chamber 11 is detected, the gas inside the oxygen detection chamber 11 is discharged through the air pump 5.
[0026] The laser gas analysis module 17 is a TDLAS module. The laser gas analysis module 17 uses a 763nm laser as the module light source. The use of the TDLAS laser gas analysis module 17 can ensure the accuracy of the equipment in monitoring oxygen.
[0027] Oxygen monitoring process: The solenoid valve inside the air inlet 3 on the outside of the oxygen concentration detection device 1 opens, and the solenoid valve at the connection between the air guide pipe 12 on the outer wall of the oxygen testing chamber 11 and the oxygen testing chamber 11 also opens. The air pump 5 operates, drawing external gas into the oxygen testing chamber 11. At this time, all solenoid valves close. The temperature sensing module 13, humidity monitoring module 14, oxygen detection module 15, pressure sensing module 16, and laser gas analysis module 17 inside the oxygen testing chamber 11 detect the temperature, humidity, oxygen content, and pressure of the gas. The calculation and analysis module 18 performs preliminary calculation and analysis on the various data inside the oxygen testing chamber 11. The data after preliminary calculation and analysis is transmitted to the CPU module 9. The CPU module 9 analyzes the data and finally calculates the oxygen content. After the detection and analysis of the sampled gas is completed, the air pump 5 operates, and the air pump 5 discharges all the gas inside the oxygen testing chamber 11.
[0028] The oxygen concentration detection device 1 is compact in size, performs real-time sampling and detection of gases, and has high accuracy and efficiency in oxygen detection.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-precision oxygen concentration detection device for use under pressure, comprising an oxygen concentration detection device (1), characterized in that: The oxygen concentration detection device (1) is provided with a detection chamber (2), and a PCB mounting plate (7) is provided on the inner side of the detection chamber (2). The PCB mounting plate (7) is fixedly installed inside the detection chamber (2) with screws. The PCB mounting plate (7) is provided with a built-in power supply (8), a CPU module (9), a capacitor (10), an oxygen testing chamber (11), and a calculation and analysis module (18). The oxygen testing chamber (11) is cylindrical. One end of the oxygen testing chamber (11) is provided with an air inlet port. The air inlet port is provided with a solenoid valve. The inner side wall of the oxygen testing chamber (11) is provided with a temperature sensing module (13), a humidity monitoring module (14), an oxygen detection module (15), a pressure sensing module (16), and a laser gas analysis module (17). The outer wall of the oxygen testing chamber (11) is provided with a connecting air guide pipe (12). The connecting air guide pipe (12) is connected to the oxygen testing chamber (11). The connection between the connecting air guide pipe (12) and the oxygen testing chamber (11) is provided with a solenoid valve. The detection chamber (2) is provided with a chamber body sealing cover (4), and a sealing ring is provided at the connection between the chamber body sealing cover (4) and the opening of the detection chamber (2). An air pump (5) is provided in the center of the outside of the chamber body sealing cover (4), and the air pump (5) is connected to the connecting air pipe (12) by an air pipe.
2. The high-precision oxygen concentration detection device under pressure environment according to claim 1, characterized in that: The outer wall of the testing chamber (2) is provided with an air inlet (3), which is connected to the oxygen testing chamber (11). A solenoid valve is provided at the connection between the air inlet (3) and the oxygen testing chamber (11).
3. The high-precision oxygen concentration detection device under pressure environment according to claim 1, characterized in that: The air pump (5) has an air outlet (6) on its outer side.
4. The high-precision oxygen concentration detection device under pressure environment according to claim 1, characterized in that: The calculation and analysis module (18) is equipped with a flow meter, an A / D conversion module, a microcontroller, a network module, a storage module, and an output module. The calculation and analysis module (18) is connected to the CPU module (9).
5. The high-precision oxygen concentration detection device under pressure environment according to claim 1, characterized in that: The laser gas analysis module (17) is a TDLAS module, and a 763nm laser is selected as the module light source for the laser gas analysis module (17).