Hydrogen detection probe
By using a combination of a water-resistant and gas-permeable membrane and a vibrator in the hydrogen detection probe, the influence of water vapor on the MEMS hydrogen sensor is solved, achieving efficient hydrogen detection and probe stability, and ensuring detection accuracy and long-term performance.
Patent Information
- Application Number
- CN202420859673.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-24
AI Technical Summary
Existing MEMS hydrogen sensors are susceptible to moisture during use, leading to inaccurate detection and insufficient structural stability, which affects long-term performance.
A hydrogen detection probe was designed, which uses a combination of a water-resistant and breathable membrane and a vibrator to prevent water vapor from entering the detection chamber and to shake off water droplets by the vibrator. Combined with a shock-absorbing sleeve, the vibration effect is reduced. The outer shell is made of stainless steel to ensure structural stability.
It effectively prevents water vapor from entering, ensuring the accuracy of hydrogen detection and the long-term stability of the probe, thus improving the service life and reliability of the MEMS hydrogen sensor.
Smart Images
Figure CN222318851U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogen detection, in particular to a hydrogen detection probe. Background Art
[0002] Hydrogen is highly reactive and unstable. When the concentration of hydrogen in the mixed gas is greater than 4%, it is very likely to explode. Therefore, it must be monitored in real time during the use and storage of hydrogen. In addition, the hydrogen detection speed must be fast enough to detect leaked hydrogen before a fire occurs. There are many types of hydrogen sensors on the market, among which MEMS hydrogen sensors are the research hotspot in the field of semiconductor metal oxide hydrogen sensors in recent years. The full name of MEMS is Micro Electromechanical System, which uses semiconductor manufacturing processes and materials to integrate sensors, actuators, mechanical mechanisms, signal processing and control circuits into one micro device or system.
[0003] The main technical difficulty and development direction of the existing MEMS hydrogen sensors on the market is the stability during long-term use. The factors affecting the stability during long-term use include the structure of the sensor itself and the environment in which the sensor is used. The current MEMS hydrogen sensor structure includes a reaction chamber and a MEMS hydrogen sensor chip. The MEMS hydrogen sensor chip is arranged in the reaction chamber. When the gas enters the reaction chamber, it will react with the coating on the surface of the MEMS hydrogen sensor chip to generate an electrical signal, thereby inferring the hydrogen concentration. When hydrogen enters the reaction chamber, it will bring in water vapor, affecting the normal operation of the MEMS hydrogen sensor chip. There is currently no reliable technical solution. Utility Model Content
[0004] The purpose of the present application is to provide a hydrogen detection probe to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a hydrogen detection probe, comprising a shell, a front end cover is installed at the front end of the shell, a rear end cover is installed at the rear end of the shell, a detection cavity is enclosed between the shell, the front end cover and the rear end cover, a MEMS hydrogen sensor is installed in the detection cavity, two air vents are provided on the front end cover, a metal sleeve is installed at the air vent, a water-blocking and breathable membrane is fixedly installed inside the metal sleeve, the metal sleeve and the front end cover are detachably connected by threads, a vibrator is fixedly installed inside the front end cover, a shock-absorbing sleeve is fixedly installed on the periphery of the front end cover, and the outer wall of the shock-absorbing sleeve is fixedly connected to the front end inner wall of the shell.
[0006] Preferably, a processor is fixedly installed inside the rear end cover, and a display is fixedly installed at the rear end of the rear end cover. The processor receives the MEMS hydrogen sensor signal and outputs the output result on the display after processing.
[0007] Preferably, a non-slip handle perpendicular to the rear end cover is fixedly installed at the rear end, a power supply is fixedly installed inside the non-slip handle, and the power supply is electrically connected to the vibrator, MEMS hydrogen sensor, display and processor through wires.
[0008] Preferably, the rear end cover is detachably connected to the housing via screws, and the MEMS hydrogen sensor is fixed on the front end surface of the rear end cover.
[0009] Preferably, a charging port electrically connected to a power source is fixedly mounted at the rear end of the anti-slip handle, and a protective cover that can cover the charging port is hingedly connected to the rear end of the anti-slip handle.
[0010] Preferably, the housing, the front end cover and the rear end cover are all made of stainless steel.
[0011] In summary, the technical effects and advantages of the utility model are:
[0012] In the utility model, a water-blocking breathable membrane is provided to prevent water vapor from entering the interior of the detection cavity, and the water vapor remains on the surface of the water-blocking breathable membrane. By turning on the vibrator, the front end cover is vibrated, and the vibration is transmitted to the water-blocking breathable membrane to shake off the surface water drops, thereby ensuring reliable air intake. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.
[0014] Figure 1 This is a schematic cross-sectional structural diagram of a hydrogen detection probe in an embodiment of the present application;
[0015] Figure 2 This is a schematic diagram of the structure of a hydrogen detection probe in an embodiment of the present application.
[0016] In the figure: 1. Shell; 2. MEMS hydrogen sensor; 3. Rear cover; 4. Front cover; 5. Shock-absorbing sleeve; 6. Vent; 8. Metal sleeve; 9. Water-blocking and breathable membrane; 10. Vibrator; 11. Processor; 12. Display; 13. Anti-slip handle; 14. Power supply; 15. Charging port; 16. Protective cover. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0019] It should also be noted that the standard parts used in this application document can be purchased from the market, and can be customized according to the description in the specification and drawings. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to the specific circumstances, and in the absence of clear limitations, machines, parts and equipment can all adopt conventional models in the prior art.
[0020] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0021] Example: Reference Figure 1-2A hydrogen detection probe shown in the figure comprises a shell 1, a front end cover 4 is installed at the front end of the shell 1, a rear end cover 3 is installed at the rear end of the shell 1, a detection cavity is enclosed between the shell 1, the front end cover 4 and the rear end cover 3, a MEMS hydrogen sensor 2 is installed in the detection cavity, two vents 6 are provided on the front end cover 4, a metal sleeve 8 is installed at the vent 6, a water-blocking breathable membrane 9 is fixedly installed inside the metal sleeve 8, the metal sleeve 8 and the front end cover 4 are detachably connected by thread, a vibrator 10 is fixedly installed inside the front end cover 4, a shock-absorbing sleeve 5 is fixedly installed on the outer periphery of the front end cover 4, the outer wall of the shock-absorbing sleeve 5 is fixedly connected to the front end inner wall of the shell 1, water vapor is prevented from entering the interior of the detection cavity by setting the water-blocking breathable membrane, the MEMS hydrogen sensor detects the hydrogen concentration, water vapor remains on the surface of the water-blocking breathable membrane, the vibrator is turned on to make the front end cover vibrate, the vibration is transmitted to the water-blocking breathable membrane to shake off the surface water droplets, so as to ensure its reliable air intake, and the design of the shock-absorbing sleeve reduces the influence of the vibration of the front end cover on other components.
[0022] With the above structure: a processor 11 is fixedly installed inside the rear end cover 3 , a display 12 is fixedly installed at the rear end of the rear end cover 3 , and the processor 11 receives the signal of the MEMS hydrogen sensor 2 and outputs the output result on the display 12 after processing.
[0023] With the above structure: the rear end of the rear cover 3 is fixedly provided with an anti-slip handle 13 perpendicular thereto, and a power supply 14 is fixedly provided inside the anti-slip handle 13. The power supply 14 is electrically connected to the vibrator, MEMS hydrogen sensor, display and processor through wires.
[0024] With the above structure, the rear end cover 3 is detachably connected to the housing 1 through screws, and the MEMS hydrogen sensor 2 is fixed on the front end surface of the rear end cover 3, so that it is easy to disassemble and inspect the MEMS hydrogen sensor.
[0025] With the above structure, a charging port 15 electrically connected to a power source is fixedly mounted at the rear end of the anti-slip handle 13, and a protective cover 16 is hingedly connected to the rear end of the anti-slip handle 13 to cover the charging port 15 for dust and water protection.
[0026] According to the above structure, the housing 1 , the front cover 4 and the rear cover 3 are all made of stainless steel.
[0027] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A hydrogen detection probe, comprising a housing (1), characterized in that: A front end cover (4) is installed at the front end of the housing (1), and a rear end cover (3) is installed at the rear end of the housing (1). A detection cavity is enclosed between the housing (1), the front end cover (4) and the rear end cover (3), and a MEMS hydrogen sensor (2) is installed in the detection cavity. Two vents (6) are provided on the front end cover (4), and a metal sleeve (8) is installed at the vents (6). A water-blocking and breathable membrane (9) is fixedly installed inside the metal sleeve (8). The metal sleeve (8) and the front end cover (4) are detachably connected by threads. A vibrator (10) is fixedly installed inside the front end cover (4), and a shock-absorbing sleeve (5) is fixedly installed on the outer periphery of the front end cover (4). The outer wall of the shock-absorbing sleeve (5) is fixedly connected to the inner wall of the front end of the housing (1).
2. A hydrogen detection probe according to claim 1, characterized in that: A processor (11) is fixedly mounted inside the rear end cover (3), a display (12) is fixedly mounted at the rear end of the rear end cover (3), and the processor (11) receives a signal from the MEMS hydrogen sensor (2) and outputs an output result on the display (12) after processing.
3. A hydrogen detection probe according to claim 1, characterized in that: A non-slip handle (13) is fixedly mounted at the rear end of the rear end cover (3) and is perpendicular thereto. A power source (14) is fixedly mounted inside the non-slip handle (13). The power source (14) is electrically connected to the vibrator, the MEMS hydrogen sensor, the display, and the processor via a wire.
4. A hydrogen detection probe according to claim 1, characterized in that: The rear end cover (3) is detachably connected to the housing (1) via screws, and the MEMS hydrogen sensor (2) is fixed on the front end surface of the rear end cover (3).
5. A hydrogen detection probe according to claim 3, characterized in that: A charging port (15) electrically connected to a power source is fixedly mounted at the rear end of the anti-slip handle (13), and a protective cover (16) capable of covering the charging port (15) is hingedly connected to the rear end of the anti-slip handle (13).
6. A hydrogen detection probe according to claim 1, characterized in that: The housing (1), the front end cover (4) and the rear end cover (3) are all made of stainless steel.