Soil VOCs detection device based on surface acoustic waves
By designing a soil VOCs detection device based on surface acoustic waves, the problems of inaccurate detection results and VOCs residues in the prior art are solved, and the stable and accurate detection of VOCs in the soil is achieved, ensuring the safety of staff.
Patent Information
- Application Number
- CN202411794272.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-14
AI Technical Summary
When existing soil VOCs detection devices detect multiple gases, it is difficult to represent VOCs detection data in soil at the same depth, and the residual VOCs on the detection device may cause harm to the staff.
A soil VOCs detection device based on surface acoustic waves is designed, including a detection rod, a detection cone, an auxiliary plate, a detection member, a collection chamber, a partition and a driving member. By inserting the detection cone into the soil, the soil temperature around the detection part increases, the driving part drives the partition to move, so that the detection part is connected to the outside world, and the collection cavity is sucked into the surrounding environment for detection.
Accurate detection of VOCs at the same soil depth is achieved, and the detection results are stable, avoiding the harm of VOCs residues to staff.
Smart Images
Figure CN119619285A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of VOCs detection, and in particular, to a soil VOCs detection device based on surface acoustic waves. Background Art
[0002] Volatile organic compounds are usually divided into several categories, such as non-methane hydrocarbons, oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, and sulfur-containing organic compounds. Volatile organic compounds participate in the formation of ozone and secondary aerosols in the atmospheric environment, and have an important impact on regional atmospheric ozone pollution and PM2.5 pollution. Most volatile organic compounds have a special unpleasant odor and are toxic, irritating, teratogenic, and carcinogenic. In particular, benzene, toluene, and formaldehyde can cause great harm to human health.
[0003] At present, most devices for detecting VOCs in soil use the principle of surface acoustic wave sensor detection. However, when this method is used to detect multiple different gases during actual use, the detection results cannot represent the VOCs detection data in the soil at the same depth, and some VOCs will remain on the detection device, which may easily cause harm to the staff. Summary of the invention
[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.
[0005] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a soil VOCs detection device based on surface acoustic wave, and a soil VOCs detection device based on surface acoustic wave includes:
[0006] The detection rod is arranged in a cylindrical shape;
[0007] A detection cone is fixedly connected to the detection rod, and the detection cone is arranged at one end of the detection rod;
[0008] A first auxiliary plate is provided in plurality, each of the plurality of first auxiliary plates is fixedly connected to the detection rod, and each of the plurality of first auxiliary plates is provided at the other end of the detection rod;
[0009] The detection parts are provided in plurality, the plurality of detection parts are all provided on the detection rod, the plurality of detection parts are all provided on a side close to the detection cone, and the plurality of detection parts are arranged equidistantly along the circumference direction of the detection rod;
[0010] A collecting chamber is arranged inside the detection rod, and the collecting chamber is also arranged between a plurality of detection members, and each detection member is connected to the collecting chamber;
[0011] There are multiple partitions, the partitions are slidably connected to the detection rod, the number of the partitions is the same as the number of the detection parts, and one partition closes one detection part;
[0012] The driving member is arranged on the detection rod, the driving member is threadedly connected to the detection rod, and each partition is fixedly connected to the driving member.
[0013] Furthermore, the detection part includes:
[0014] A detection channel is provided on the detection rod, one side of the detection channel is connected to the collection chamber, and the other side of the detection channel is connected to the outside world;
[0015] A first semipermeable membrane is arranged inside the detection channel, and the first semipermeable membrane is arranged near the connection between the detection channel and the outside world;
[0016] A second semipermeable membrane is disposed inside the detection channel, and the second semipermeable membrane is disposed near the connection between the detection channel and the collection chamber;
[0017] A detection membrane is arranged inside the detection channel, and the detection membrane is arranged between the first semipermeable membrane and the second semipermeable membrane;
[0018] The surface acoustic wave sensor is arranged in the detection channel. The surface acoustic wave sensor is arranged on a side close to the detection membrane. The surface acoustic wave sensor is fixedly connected to the inner wall of the detection channel.
[0019] Furthermore, one side of the detection channel communicating with the outside is closed by a partition.
[0020] Furthermore, the interior of the collection chamber is at negative pressure.
[0021] Furthermore, the first semipermeable membrane covers one side of the detection channel, and the second semipermeable membrane covers the other side of the detection channel, so that a detection cavity is formed inside the detection channel.
[0022] Further, the detection membrane is arranged in the middle of the detection cavity, and the detection membrane divides the detection cavity into a first inlet cavity and a first outlet cavity.
[0023] Furthermore, the driving member comprises:
[0024] A driving rod is inserted into the detection rod, and the driving rod is rotatably connected with the detection rod;
[0025] The driving disc is arranged on the detection rod, the driving disc is slidably connected to the detection rod, the driving disc is threadedly connected to the driving rod, and each partition is fixedly connected to the driving disc.
[0026] Furthermore, a plurality of limiting grooves are provided on the outer circumferential surface of the detection rod, the number of the limiting grooves is the same as the number of the partitions, each limiting groove is communicated with a detection channel, and each partition is slidably connected with a limiting groove.
[0027] Furthermore, a soil VOCs detection device based on surface acoustic wave also includes:
[0028] A second auxiliary plate is arranged at one end of the detection rod, the second auxiliary plate is arranged at a side close to the first auxiliary plate, and one end of the second auxiliary plate is fixedly connected to the driving rod;
[0029] The handle is rotatably arranged on the second auxiliary plate, and the handle is arranged at the other end of the second auxiliary plate.
[0030] Furthermore, a plurality of first auxiliary plates are arranged equidistantly along the circumferential direction of the detection rod.
[0031] The beneficial effect of the present application is that it provides a soil VOCs detection device based on surface acoustic waves with a stable detection process and accurate detection results. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.
[0033] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.
[0034] In the attached picture:
[0035] Figure 1 A schematic diagram of the structure of a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0036] Figure 2 A schematic cross-sectional view of the connection between a detection rod and a driving member in a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0037] Figure 3 A schematic diagram of the positional relationship between a first semipermeable membrane and a second semipermeable membrane in a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0038] Figure 4 A schematic diagram of the positional relationship between a detection rod and a limiting groove in a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0039] Figure 5 A schematic diagram of the positional relationship between a first inlet cavity and a first outlet cavity in a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0040] Figure 6 A schematic diagram of the positional relationship between a partition and a driving disk in a soil VOCs detection device based on surface acoustic waves provided in one embodiment of the present application.
[0041] Reference numerals:
[0042] 11. Detection rod; 111. Detection channel; 112. First semipermeable membrane; 113. Second semipermeable membrane; 114. Detection membrane; 115. Surface acoustic wave sensor; 116. Limiting groove; 12. Detection cone; 13. First auxiliary plate; 14. Detection member; 15. Collection chamber; 16. Partition; 17. Driving member; 171. Driving rod; 172. Driving disk; 18. Detection chamber; 19. First inlet chamber; 20. First outlet chamber; 21. Second auxiliary plate; 22. Handle. DETAILED DESCRIPTION
[0043] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0044] It should also be noted that, for ease of description, only the relevant parts are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0045] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0046] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0047] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0048] like Figure 1 and Figure 2As shown, in one embodiment of the present application, a soil VOCs detection device based on surface acoustic waves includes a detection rod 11, a detection cone 12, a plurality of first auxiliary plates 13, a plurality of detection members 14, a collection chamber 15, a plurality of partitions 16 and a driving member 17.
[0049] The detection rod 11 is configured in a cylindrical shape.
[0050] The detection cone 12 is fixedly connected to the detection rod 11 , and the detection cone 12 is arranged at one end of the detection rod 11 .
[0051] There are multiple first auxiliary plates 13 , each of which is fixedly connected to the detection rod 11 , and each of which is disposed at the other end of the detection rod 11 .
[0052] There are multiple detection members 14 , all of which are disposed on the detection rod 11 , all of which are disposed on a side close to the detection cone 12 , and the multiple detection members 14 are equidistantly arranged along the circumference of the detection rod 11 .
[0053] The collecting chamber 15 is disposed inside the detection rod 11 . The collecting chamber 15 is also disposed between the plurality of detection members 14 . Each detection member 14 is communicated with the collecting chamber 15 .
[0054] There are multiple partitions 16 , which are slidably connected to the detection rod 11 . The number of the partitions 16 is the same as the number of the detection elements 14 , and one partition 16 encloses one detection element 14 .
[0055] The driving member 17 is disposed on the detection rod 11 , the driving member 17 is threadedly connected to the detection rod 11 , and each partition 16 is fixedly connected to the driving member 17 .
[0056] Specifically, the detection cone 12 is arranged at the bottom of the detection rod 11, and the cone tip part of the detection cone 12 is located at the bottom of the detection cone 12; multiple first auxiliary plates 13 are arranged at the top of the detection rod 11, and multiple first auxiliary plates 13 are fixedly connected to the outer circumferential surface of the detection rod 11; multiple detection members 14 are arranged inside the detection rod 11, and multiple detection members 14 are arranged close to the bottom of the detection rod 11.
[0057] In this embodiment, pressure is applied to the tops of the plurality of first auxiliary plates 13, and the tip of the detection cone 12 at the bottom is inserted into the soil to a certain depth, and then each detection member 14 is started to increase the soil temperature around the plurality of detection members 14, and then the driving member 17 is started. At this time, the driving member 17 drives the plurality of partitions 16 to move, so that each detection member 14 is connected to the outside world. At this time, the VOCs in the surrounding soil are in an easy-to-flow volatile state. At this time, under the action of the collection chamber 15, each detection member 14 absorbs the VOCs in the surrounding environment for detection. Since the plurality of detection members 14 are equidistantly arranged along the circumferential direction of the detection rod 11, the plurality of detection members 14 can detect the VOCs at the same soil depth, and the detection result is accurate and can represent the VOCs detection data of the soil depth.
[0058] like Figure 3 As shown, in one embodiment of the present application, the detection element 14 includes a detection channel 111 , a first semi-permeable membrane 112 , a second semi-permeable membrane 113 , a detection membrane 114 and a surface acoustic wave sensor 115 .
[0059] The detection channel 111 is opened on the detection rod 11 , one side of the detection channel 111 is connected to the collection chamber 15 , and the other side of the detection channel 111 is connected to the outside.
[0060] The first semi-permeable membrane 112 is disposed inside the detection channel 111 , and the first semi-permeable membrane 112 is disposed near the connection between the detection channel 111 and the outside.
[0061] The second semi-permeable membrane 113 is disposed inside the detection channel 111 . The second semi-permeable membrane 113 is disposed near the connection between the detection channel 111 and the collection chamber 15 .
[0062] The detection membrane 114 is disposed inside the detection channel 111 . The detection membrane 114 is disposed between the first semi-permeable membrane 112 and the second semi-permeable membrane 113 .
[0063] The surface acoustic wave sensor 115 is disposed in the detection channel 111 . The surface acoustic wave sensor 115 is disposed on a side close to the detection membrane 114 . The surface acoustic wave sensor 115 is fixedly connected to the inner wall of the detection channel 111 .
[0064] Specifically, during use, the first semipermeable membrane 112 and the second semipermeable membrane 113 are both self-heated, and the first semipermeable membrane 112 and the second semipermeable membrane 113 are both used to prevent other gases in the soil from diffusing in reverse, thereby affecting the detection membrane 114 and causing inaccurate detection results.
[0065] In this embodiment, by utilizing the principle of dissolution and diffusion of the detection membrane 114, the VOCs gas molecules dissolve on the surface of the detection membrane 114 after contacting the detection membrane 114, thereby causing changes in the surface acoustic wave of the detection membrane 114. The surface acoustic wave sensor 115 detects the changes on the detection membrane 114, thereby performing qualitative and quantitative detection of the VOCs gas molecules. Due to the concentration gradient generated on both sides of the detection membrane 114, the gas molecules diffuse to the other side of the detection membrane 114, and are finally resolved from the other side of the detection membrane 114 to achieve selective permeability of the VOCs gas.
[0066] like Figure 2 and Figure 3 As shown, in one embodiment of the present application, one side of the detection channel 111 communicating with the outside is closed by a partition 16 .
[0067] In this embodiment, when not in use, each detection component 14 is enclosed by a partition 16 to prevent external gas from interfering with the inside of the detection component 14. When in use, the opening and closing degree of the partition 16 is adjusted to control the amount of gas allowed to enter each detection component 14.
[0068] like Figure 2 As shown, in one embodiment of the present application, the interior of the collecting chamber 15 is at negative pressure.
[0069] In this embodiment, the collecting chamber 15 is located between the multiple detection elements 14 , and the negative pressure of the collecting chamber 15 causes the airflow direction in each detection element 14 to point to the collecting chamber 15 , thereby making the detection result of each detection element 14 more accurate.
[0070] like Figure 4 As shown, in one embodiment of the present application, the first semipermeable membrane 112 covers one side of the detection channel 111 , and the second semipermeable membrane covers the other side of the detection channel 111 , so that a detection cavity 18 is formed inside the detection channel 111 .
[0071] In this embodiment, a heating device is provided on both the first semipermeable membrane 112 and the second semipermeable membrane 113 , and the heating device is used to maintain the temperature in the detection cavity 18 so that the VOCs gas molecules can maintain stable movement in the detection cavity 18 , thereby improving the stability of the detection membrane 114 during detection.
[0072] like Figure 5 As shown, in one embodiment of the present application, the detection membrane 114 is disposed in the middle of the detection chamber 18 , and the detection membrane 114 divides the detection chamber 18 into a first inlet chamber 19 and a first outlet chamber 20 .
[0073] In this embodiment, the first entry chamber 19 is the first chamber through which VOCs gas molecules in the soil enter the detection channel 111. Under the action of the negative pressure in the collection chamber 15, the VOCs gas molecules in a volatilized state enter the first entry chamber 19 until they come into contact with the detection membrane 114 and are detected. After the VOCs gas molecules are precipitated from the detection membrane 114 and enter the first discharge chamber 20, they flow again and enter the collection chamber 15. Since the temperature drops after entering the collection chamber 15, the VOCs gas molecules will condense and be collected at this time to prevent harm to the staff.
[0074] like Figure 5 and Figure 6 As shown, in one embodiment of the present application, the driving member 17 includes a driving rod 171 and a driving disk 172 .
[0075] The driving rod 171 is inserted into the detecting rod 11 , and the driving rod 171 is rotatably connected to the detecting rod 11 .
[0076] The driving disk 172 is disposed on the detection rod 11 , the driving disk 172 is slidably connected to the detection rod 11 , the driving disk 172 is threadedly connected to the driving rod 171 , and each partition 16 is fixedly connected to the driving disk 172 .
[0077] Specifically, the driving rod 171 is rotatably set on the detection rod 11, the driving rod 171 is set to a cylindrical shape, the axis of the driving rod 171 coincides with the axis of the detection rod 11, and an external thread is set on the outer circumferential surface of the driving rod 171, and the external thread is set close to the partition 16; a limiting channel is opened on the top of the multiple detection parts 14, the driving disk 172 is slidably connected to the limiting channel, the part of the driving rod 171 inserted into the limiting channel is threadedly connected to the driving disk 172, and the multiple partitions 16 close the limiting channel at the same time.
[0078] In this embodiment, the driving rod 171 is rotated to drive the driving disk 172 to slide along the limiting channel, and when the driving disk 172 moves, the plurality of partitions 16 are synchronously driven to move.
[0079] like Figure 4 As shown, in one embodiment of the present application, a plurality of limit grooves 116 are provided on the outer circumferential surface of the detection rod 11, the number of the limit grooves 116 is the same as the number of the partitions 16, each limit groove 116 is connected to a detection channel 111, and each partition 16 is slidably connected to a limit groove 116.
[0080] In this embodiment, each limiting groove 116 is communicated with the limiting channel.
[0081] like Figure 5 As shown, in one embodiment of the present application, a soil VOCs detection device based on surface acoustic waves also includes a second auxiliary plate 21 and a handle 22.
[0082] The second auxiliary plate 21 is disposed at one end of the detection rod 11 . The second auxiliary plate 21 is disposed at a side close to the first auxiliary plate 13 . One end of the second auxiliary plate 21 is fixedly connected to the driving rod 171 .
[0083] The handle 22 is rotatably disposed on the second auxiliary plate 21 , and the handle 22 is disposed at the other end of the second auxiliary plate 21 .
[0084] In this embodiment, the handle 22 is pushed to drive the second auxiliary plate 21 to rotate around the axis of the detection rod 11 , and when the second auxiliary plate 21 rotates, the detection rod 11 is driven to rotate synchronously.
[0085] like Figure 1 As shown, in one embodiment of the present application, a plurality of first auxiliary plates 13 are arranged equidistantly along the circumferential direction of the detection rod 11 .
[0086] Specifically, at least two first auxiliary plates 13 are provided, and each first auxiliary plate 13 is fixedly connected to the outer circumferential surface of the detection rod 11 .
[0087] In this embodiment, multiple first auxiliary plates 13 are added to ensure that the top of the detection rod 11 has a stable contact surface when an external force is applied to it, thereby reducing the probability that the detection rod 11 is tilted due to the external force applied to the top of the detection rod 11, and improving the stability of the detection rod 11 when it is inserted into the soil.
[0088] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.
Claims
1. A soil VOCs detection device based on surface acoustic wave, characterized in that: The soil VOCs detection device based on surface acoustic wave comprises: The detection rod is arranged in a cylindrical shape; A detection cone is fixedly connected to the detection rod, and the detection cone is arranged at one end of the detection rod; A first auxiliary plate is provided in plurality, each of the plurality of first auxiliary plates is fixedly connected to the detection rod, and each of the plurality of first auxiliary plates is provided at the other end of the detection rod; The detection members are provided in plurality, the plurality of the detection members are all provided on the detection rod, the plurality of the detection members are all provided on a side close to the detection cone, and the plurality of the detection members are arranged equidistantly along the circumferential direction of the detection rod; A collecting chamber is arranged inside the detection rod, and the collecting chamber is also arranged between the plurality of detection members, and each of the detection members is communicated with the collecting chamber; A plurality of partitions are provided, the partitions are slidably connected to the detection rod, the number of the partitions is the same as the number of the detection elements, and one partition encloses one detection element; A driving member is arranged on the detection rod, the driving member is threadedly connected to the detection rod, and each of the partitions is fixedly connected to the driving member.
2. A soil VOCs detection device based on surface acoustic wave according to claim 1, characterized in that: The detection part comprises: A detection channel is provided on the detection rod, one side of the detection channel is connected to the collection chamber, and the other side of the detection channel is connected to the outside world; A first semi-permeable membrane is disposed inside the detection channel, and the first semi-permeable membrane is disposed near the connection between the detection channel and the outside; A second semipermeable membrane is disposed inside the detection channel, and the second semipermeable membrane is disposed near the connection between the detection channel and the collection chamber; A detection membrane, disposed inside the detection channel, wherein the detection membrane is disposed between the first semipermeable membrane and the second semipermeable membrane; A surface acoustic wave sensor is arranged in the detection channel. The surface acoustic wave sensor is arranged on a side close to the detection membrane. The surface acoustic wave sensor is fixedly connected to the inner wall of the detection channel.
3. A soil VOCs detection device based on surface acoustic wave according to claim 2, characterized in that: The side of the detection channel communicating with the outside is closed by a partition.
4. The soil VOCs detection device based on surface acoustic wave according to claim 3 is characterized in that: The interior of the collecting chamber is under negative pressure.
5. The soil VOCs detection device based on surface acoustic wave according to claim 4, characterized in that: The first semipermeable membrane covers one side of the detection channel, and the second semipermeable membrane covers the other side of the detection channel, so that a detection cavity is formed inside the detection channel.
6. The soil VOCs detection device based on surface acoustic wave according to claim 5, characterized in that: The detection membrane is arranged in the middle of the detection cavity, and the detection membrane divides the detection cavity into a first inlet cavity and a first outlet cavity.
7. The soil VOCs detection device based on surface acoustic wave according to claim 6, characterized in that: The driving member comprises: A driving rod is inserted into the detection rod, and the driving rod is rotatably connected to the detection rod; A driving disk is arranged on the detection rod, the driving disk is slidably connected to the detection rod, the driving disk is threadedly connected to the driving rod, and each of the partitions is fixedly connected to the driving disk.
8. The soil VOCs detection device based on surface acoustic wave according to claim 7, characterized in that: A plurality of limiting grooves are provided on the outer circumferential surface of the detection rod, the number of the limiting grooves is the same as the number of the partitions, each of the limiting grooves is communicated with a detection channel, and each of the partitions is slidably connected with a limiting groove.
9. The soil VOCs detection device based on surface acoustic wave according to claim 8, characterized in that: The soil VOCs detection device based on surface acoustic wave also includes: A second auxiliary plate, disposed at one end of the detection rod, the second auxiliary plate is disposed at a side close to the first auxiliary plate, and one end of the second auxiliary plate is fixedly connected to the driving rod; A handle is rotatably disposed on the second auxiliary plate, and the handle is disposed at the other end of the second auxiliary plate.
10. The soil VOCs detection device based on surface acoustic wave according to claim 9, characterized in that: The plurality of first auxiliary plates are arranged equidistantly along the circumferential direction of the detection rod.