阅读说明：本技术 液面检测装置及系统 (Liquid level detection device and system ) 是由 不公告发明人 于 2021-01-11 设计创作，主要内容包括：本申请涉及液面检测装置及系统,具体而言,涉及液面检测领域。本申请提供的液面检测装置包括：容器、透光部、第一金属膜层、金属漂浮层和第二金属膜层；当需要对待测液面进行检测的时候,将本申请的装置放置在待测液面上,光照射在第二金属膜层、金属漂浮层和第一金属膜层上激发表面等离激元效应,当液体高度变化时,由于金属漂浮层的多个金属单元的漂浮高度改变,第一金属膜层和第二金属膜层之间的耦合距离发生改变,进而改变第一金属膜层和第二金属膜层之间的耦合强度,使得通过孔洞位置的透光部的输出光强度发生改变,通过对输出光的强度检测,并根据该输出光的强度与该待测液面高度的对应关系,得到待测液面的高度。(The application relates to a liquid level detection device and system, in particular to the field of liquid level detection. The application provides a liquid level detection device includes: the container comprises a container, a light-transmitting part, a first metal film layer, a metal floating layer and a second metal film layer; when needs detect the liquid level that awaits measuring, place the device of this application on the liquid level that awaits measuring, the light struck is at second metal rete, arouse surface plasmon effect on metal floating layer and the first metal rete, when liquid altitude variation, because the high change of floating of a plurality of metal units on metal floating layer, coupling distance between first metal rete and the second metal rete changes, and then change the coupling intensity between first metal rete and the second metal rete, make the output light intensity of the printing opacity portion through the hole position change, through the intensity detection to output light, and according to the intensity of this output light and the corresponding relation of this liquid level height that awaits measuring, obtain the height of the liquid level that awaits measuring.)

1. A liquid level detection apparatus, the apparatus comprising: the container comprises a container, a light-transmitting part, a first metal film layer, a metal floating layer and a second metal film layer; the container is an open-ended structure, and is provided with the hole on the face relative with opening one side, printing opacity portion sets up in the hole, first metal rete the metal floats the layer with second metal rete all sets up inside the container, first metal rete position is in the container is close to the position of hole, the metal floats the layer and includes a plurality of metal unit, and is a plurality of the metal unit cycle sets up first metal rete is kept away from one side of hole, and a plurality of the metal unit changes floating height under the effect of the liquid that awaits measuring, second metal rete sets up container open position, the container is close to be provided with first feed liquor hole on the lateral wall of first metal rete.

2. The liquid level detection device according to claim 1, wherein the first metal film layer and the second metal film layer have the same structure.

3. The liquid level detection device according to claim 2, wherein the first metal film layer and the second metal film layer each have a thickness of 10nm to 60 nm.

4. The liquid level detection device according to claim 3, wherein the first metal film layer and the second metal film layer are both made of a noble metal.

5. The liquid level detection device according to claim 1, wherein the plurality of metal units of the metal float layer have a shape of: any one of a rectangular parallelepiped, a triangular prism, a triangular pyramid and a sphere.

6. The liquid level detection device according to claim 1, further comprising a graphene layer, a first electrode, and a second electrode, wherein the graphene layer is disposed on a side of the second metal film layer away from the first metal film layer, and the first electrode and the second electrode are respectively disposed at two ends of the graphene layer on the side away from the second metal film layer.

7. The apparatus according to claim 1, wherein the container further comprises a second inlet hole provided on a side wall opposite to the first inlet hole.

8. A liquid level detection system, the system comprising: the liquid level detection device comprises a light source, an optical signal detector and the liquid level detection device as claimed in any one of claims 1 to 7, wherein the light source is arranged at one end of the second metal film layer of the liquid level detection device and is used for generating an optical signal, and the optical signal detector is arranged at one end of the hole of the liquid level detection device and is used for receiving an output optical signal generated by the light source and sequentially passing through the second metal film layer, the metal floating layer, the first metal film layer and the light-transmitting part.

Technical Field

The application relates to the field of liquid level detection, in particular to a liquid level detection device and system.

Background

In the prior art, liquid level measurement is generally performed by an electrical or optical measuring device, an optical measuring method is generally performed by measuring reflected light to measure the liquid level, and the electrical measuring device is generally performed by measuring the liquid level to be measured by a resistor.

However, both electrical and optical measurements require consideration of the waterproof and hermetic properties of the device, which makes the device for measuring the liquid level relatively complicated and is prone to danger both electrically and optically if flammable and explosive substances are measured.

Disclosure of Invention

The present invention is directed to provide a liquid level detection device and system, which solve the problems in the prior art that the device for measuring the liquid level is complex due to the waterproof and sealing properties of the device for both electrical and optical measurements, and the electrical and optical measurements are dangerous if flammable and explosive substances are measured.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, the present application provides a liquid level detection device, comprising: the container comprises a container, a light-transmitting part, a first metal film layer, a metal floating layer and a second metal film layer; the container is one side open-ended structure, and be provided with the hole on the face relative with the opening one side, the printing opacity portion sets up in the hole, first metal film layer, metal floats layer and second metal film layer and all sets up inside the container, first metal film layer position is close to the position of hole at the container, metal floats the layer including a plurality of metal unit, a plurality of metal unit periods set up the one side of keeping away from the hole at first metal film layer, and a plurality of metal unit change the floating height under the effect of the liquid that awaits measuring, second metal film layer sets up at container open position, the container is close to and is provided with first feed liquor hole on the lateral wall of first metal film layer.

Optionally, the first metal film layer and the second metal film layer have the same structure.

Optionally, the thickness of each of the first metal film layer and the second metal film layer is 10nm to 60 nm.

Optionally, the first metal film layer and the second metal film layer are both made of noble metals.

Optionally, the shape of the plurality of metal units of the metal floating layer is: any one of a rectangular parallelepiped, a triangular prism, a triangular pyramid and a sphere.

Optionally, the device further includes a graphene layer, a first electrode and a second electrode, the graphene layer is disposed on one side of the second metal film layer away from the first metal film layer, and the first electrode and the second electrode are respectively disposed at two ends of the graphene layer away from one side of the second metal film layer.

Optionally, the vessel further comprises a second inlet aperture disposed on the side wall opposite the first inlet aperture.

In a second aspect, the present application provides a liquid level detection system, the system comprising: the liquid level detection device comprises a light source, an optical signal detector and the liquid level detection device of any one of the first aspect, wherein the light source is arranged at one end of a second metal film layer of the liquid level detection device and used for generating an optical signal, and the optical signal detector is arranged at one end of a hole of the liquid level detection device and used for receiving the optical signal generated by the light source and sequentially passing through the second metal film layer, the metal floating layer, the first metal film layer and the light transmission part to output the optical signal.

The invention has the beneficial effects that:

the application provides a liquid level detection device includes: the container comprises a container, a light-transmitting part, a first metal film layer, a metal floating layer and a second metal film layer; the container is of a structure with one side open, a hole is formed in the side opposite to the open side, the light transmission part is arranged in the hole, the first metal film layer, the metal floating layer and the second metal film layer are arranged inside the container, the first metal film layer is arranged at the position, close to the hole, of the container, the metal floating layer comprises a plurality of metal units, the plurality of metal units are periodically arranged on one side, far away from the hole, of the first metal film layer, the floating height of the plurality of metal units is changed under the action of liquid to be detected, the second metal film layer is arranged at the open position of the container, and a first liquid inlet hole is formed in the side wall, close to the first metal film layer, of the container; when the liquid level to be detected needs to be detected, the device is placed on the liquid level to be detected, liquid in the liquid level to be detected enters the container through the first liquid inlet hole, the floating heights of the metal units are changed under the action of the liquid, the light irradiates the second metal film layer, the surface plasmon effect is excited on the second metal film layer, the metal floating layer and the first metal film layer, when the liquid height is changed, the coupling distance between the first metal film layer and the second metal film layer is changed due to the change of the floating heights of the metal units of the metal floating layer, and further the coupling strength between the first metal film layer and the second metal film layer is changed, so that the output light intensity of the light transmission part passing through the hole is changed, the output light intensity is detected, and according to the corresponding relation between the output light intensity and the liquid level to be detected, and obtaining the height of the liquid level to be measured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a liquid level detection apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a liquid level detection apparatus according to an embodiment of the present invention, into which liquid to be detected is injected;

fig. 3 is a schematic structural diagram of another liquid level detection device according to an embodiment of the invention.

Icon: 10-a container; 11-a light-transmitting portion; 12-a first inlet well; 20-a first metal film layer; 30-a metal floating layer; 40-a second metal film layer; 50-a graphene layer; 60-a first electrode; 70-second electrode.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are one embodiment of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to make the implementation of the present invention clearer, the following detailed description is made with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a liquid level detection apparatus according to an embodiment of the present invention; as shown in fig. 1, the present application provides a liquid level detection apparatus, comprising: a container 10, a light-transmitting portion 11, a first metal film layer 20, a metal floating layer 30, and a second metal film layer 40; container 10 is one side open-ended structure, and be provided with the hole on the face relative with the opening one side, printing opacity portion 11 sets up in the hole, first metal rete 20, metal floats layer 30 and second metal rete 40 and all sets up inside container 10, first metal rete 20 position is close to the position of hole at container 10, metal floats layer 30 and includes a plurality of metal unit, a plurality of metal unit cycle sets up the one side of keeping away from the hole at first metal rete 20, and a plurality of metal unit change the floating height under the effect of the liquid that awaits measuring, second metal rete 40 sets up at container 10 open position, container 10 is provided with first feed liquor hole 12 on being close to the lateral wall of first metal rete 20.

Fig. 2 is a schematic structural diagram of a liquid level detection apparatus according to an embodiment of the present invention, into which liquid to be detected is injected; as shown in fig. 2, the container 10 is generally a rectangular parallelepiped, the volume and other geometric parameters of the rectangular parallelepiped container 10 are set according to actual needs, and are not specifically limited herein, the rectangular parallelepiped container 10 is of a structure with one open side, and a hole is provided on a side opposite to the open side, that is, a top side of the rectangular parallelepiped container 10 is open, a bottom side is provided with a hole, the hole is filled with a light-transmitting portion 11, so that light can continue to propagate through the light-transmitting portion 11, the light-transmitting portion 11 is a light-transmitting material, the first metal film layer 20 is disposed at the bottom of the container 10, the second metal film layer 40 is disposed at the top of the container 10, generally, an edge of the second metal film layer 40 is fixedly connected to an inner wall of the container 10, a metal floating layer 30 is disposed between the first metal film layer 20 and the second metal film layer 40, the metal floating layer 30 includes a plurality of metal units, a plurality of metal units are periodically arranged on the first metal film layer 20 and below the second metal film layer 40, and the plurality of metal units and the first metal film layer 20 are not fixed, the plurality of metal units can float on the liquid surface, the plurality of metal units can be in a hollow metal structure or a light alloy, and are not particularly limited herein, as long as the plurality of metal units can float on the liquid surface to be measured, the side wall of the container 10 close to the first metal film layer 20 is provided with a first liquid inlet hole 12, and the first liquid inlet hole 12 is generally arranged close to the first metal film layer 20; referring to fig. 2, when a liquid level to be detected needs to be detected, the apparatus of the present application is placed on the liquid level to be detected, liquid in the liquid level to be detected enters the container 10 through the first liquid inlet hole 12, under the action of the liquid, floating heights of the plurality of metal units change, when the liquid level inside the container 10 is flush with the liquid level to be detected outside the container 10, the height of the plurality of metal units is expressed as the height of the liquid level to be detected outside the container 10, light acts on the second metal film layer 40, a surface plasmon effect is excited on the second metal film layer 40, the metal floating layer 30 and the first metal film layer 20, due to the change in the floating heights of the plurality of metal units of the metal floating layer 30, a coupling distance between the first metal film layer 20 and the second metal film layer 40 is changed, and further a coupling strength between the first metal film layer 20 and the second metal film layer 40 is changed, the intensity of the output light passing through the light-transmitting part 11 at the hole position is changed, and the height of the liquid level to be detected is obtained by detecting the intensity of the output light and according to the corresponding relation between the intensity of the output light and the height of the liquid level to be detected; it should be noted that, the device of the present application is placed on the liquid level to be measured, due to the reason of gravity, the liquid level detection device will sink, the liquid to be measured will enter the container 10 through the first liquid inlet hole 12, until the liquid level inside the container 10 is horizontal to the liquid level outside the container 10, the metal floating layer 30 will float under the action of the liquid level to be measured, the height changes, but when the liquid level inside the container 10 is horizontal to the liquid level outside the container 10, the metal floating layer 30 will reach a balanced state, and the intensity of the output light and the corresponding relationship of the liquid level to be measured are obtained according to the experimental measurement, which is not described herein.

In addition, the arrangement period of the plurality of metal units of the metal floating layer 30 is a period that sequentially increases from left to right, for convenience of description, the number of the metal units is described as three rows and three columns, 9, and the distance between the first metal unit in the first row and the second metal unit in the first row is smaller than the distance between the second metal unit in the first row and the third metal unit in the first row; the spacing distance between the first metal unit in the second row and the second metal unit in the second row is smaller than the spacing distance between the second metal unit in the second row and the third metal unit in the second row; the spacing distance between the first metal unit in the third row and the second metal unit in the third row is smaller than that between the second metal unit in the third row and the third metal unit in the third row; in practical application, the device of the present application can also reflect the fluctuation of the fluid surface of the object, when the fluctuation is higher or lower in a certain column under the action of the fluctuation, the red shift or blue shift of the resonance position can be caused. Because the length of each row of the rectangular rods is different, the resonance position of each row of the floats is different, when the action position of a certain row subjected to fluctuation becomes higher or lower, and the distance between the first metal layer and the second metal layer changes, namely the coupling distance changes, the resonance position of the row of floats with changed height can be subjected to red shift or blue shift, and then the fluctuation of a certain area is judged, and the size of the fluctuation of the surface of the fluid can be judged according to the distance of the red blue shift, and the device has the following specific beneficial effects: (1) the height of the liquid is reflected by the transmission spectrum, the spectrum can accurately reflect the small change of the height of the liquid, and the accuracy is high. (2) The liquid level fluctuation condition of a certain area of the liquid can be detected.

Optionally, the first metal film layer 20 and the second metal film layer 40 have the same structure.

Alternatively, the structures of the first metal film layer 20 and the second metal film layer 40 may be different.

Optionally, the thickness of each of the first metal film layer 20 and the second metal film layer 40 is 10nm to 60 nm.

The thickness of the first metal film layer 20 is equal to the thickness of the second metal film layer 40, and the thickness is any size between 10nm and 60 nm.

Optionally, the materials of the first metal film layer 20 and the second metal film layer 40 are both noble metals.

The material of the first metal film layer 20 and the second metal film layer 40 may be a single noble metal, or a mixed material composed of multiple noble metals, and if the material of the first metal film layer 20 and the second metal film layer 40 is a mixed material composed of multiple noble metals, the mixed size of the mixed material is set according to actual needs, and is not specifically limited herein.

Optionally, the shapes of the plurality of metal units of the metal floating layer 30 are: any one of a rectangular parallelepiped, a triangular prism, a triangular pyramid and a sphere.

The shape of the plurality of metal units of the metal floating layer 30 may be a rectangular parallelepiped, a triangular prism, a triangular pyramid, or a sphere.

FIG. 3 is a schematic structural diagram of another liquid level detection device according to an embodiment of the present invention; as shown in figure 3 of the drawings,

optionally, the apparatus further includes a graphene layer 50, a first electrode 60, and a second electrode 70, the graphene layer 50 is disposed on a side of the second metal film layer 40 away from the first metal film layer 20, and the first electrode 60 and the second electrode 70 are respectively disposed at two ends of the graphene layer 50 away from the second metal film layer 40.

When the second metal film layer 40, the metal floating layer 30 and the first metal film layer 20 generate the action of surface plasmon under the action of light, electrons which move freely are formed on the second metal film layer 40, then the electrons are conducted to the first electrode 60 and the second electrode 70 through the graphene layer 50, and then current is measured on the first electrode 60 and the second electrode 70. When the liquid heights are different, the floating heights of the metal floating layers 30 are different, and the coupling strengths between the first metal film layer 20 and the second metal film layer 40 are different, so that the number of free electrons on the first metal film layer 20 is different, the measured current sizes are different, and the liquid heights can be further reflected.

Optionally, the vessel 10 further comprises a second inlet opening (not shown) provided in the side wall opposite the first inlet opening 12.

Optionally, the second metal film layer 40 is directly replaced by graphene. Because the graphene is very thin and has very strong light transmittance, the light intensity is generally stronger when the transmission spectrum is measured, so the change of the liquid level height can be more obvious in the change of the light intensity at the resonance position, and the measurement sensitivity is increased.

Alternatively, light is directed onto the structure at an oblique incidence and the reflectance spectrum is measured. Therefore, the problems that the optical signal detection device is placed in liquid, water is required to be prevented and the like are solved.

The application provides a liquid level detection device includes: a container 10, a light-transmitting portion 11, a first metal film layer 20, a metal floating layer 30, and a second metal film layer 40; the container 10 is of a structure with one open side, a hole is formed in the side opposite to the open side, the light transmission part 11 is arranged in the hole, the first metal film layer 20, the metal floating layer 30 and the second metal film layer 40 are all arranged inside the container 10, the first metal film layer 20 is positioned at the position, close to the hole, of the container 10, the metal floating layer 30 comprises a plurality of metal units, the plurality of metal units are periodically arranged at one side, far away from the hole, of the first metal film layer 20, the floating heights of the plurality of metal units are changed under the action of liquid to be detected, the second metal film layer 40 is arranged at the open position of the container 10, and a first liquid inlet hole 12 is formed in the side wall, close to the first metal film layer 20, of the container 10; when the liquid level to be detected needs to be detected, the device is placed on the liquid level to be detected, liquid in the liquid level to be detected enters the container 10 through the first liquid inlet hole 12, the floating heights of the metal units are changed under the action of the liquid, the light irradiates the second metal film layer 40, the surface plasmon effect is excited on the second metal film layer 40, the metal floating layer 30 and the first metal film layer 20, when the liquid height is changed, the coupling distance between the first metal film layer 20 and the second metal film layer 40 is changed due to the change of the floating heights of the metal units of the metal floating layer 30, the coupling strength between the first metal film layer 20 and the second metal film layer 40 is further changed, so that the output light intensity of the light transmission part 11 passing through the hole position is changed, the output light intensity is detected, and according to the corresponding relation between the output light intensity and the liquid level to be detected, and obtaining the height of the liquid level to be measured.

The application provides a liquid level detection system, the system includes: the liquid level detection device comprises a light source, an optical signal detector and any one of the liquid level detection devices, wherein the light source is arranged at one end of a second metal film layer 40 of the liquid level detection device and used for generating an optical signal, and the optical signal detector is arranged at one end of a hole of the liquid level detection device and used for receiving an output optical signal of the optical signal generated by the light source sequentially passing through the second metal film layer 40, the metal floating layer 30, the first metal film layer 20 and the light transmission part 11.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.