CN216116250U - Liquid level sensing device - Google Patents
Liquid level sensing device Download PDFInfo
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- CN216116250U CN216116250U CN202121897745.4U CN202121897745U CN216116250U CN 216116250 U CN216116250 U CN 216116250U CN 202121897745 U CN202121897745 U CN 202121897745U CN 216116250 U CN216116250 U CN 216116250U
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Abstract
The utility model provides a liquid level sensing device. The liquid level sensing device comprises a sensor bracket and a liquid level probe; the sensor bracket is used for connecting an external container, and the external container is used for containing liquid to be measured; the liquid level probe is detachably connected to the sensor bracket; the quantity of liquid level probe is a plurality of, and a plurality of liquid level probes evenly set up along the sensor support one side surface towards the liquid that awaits measuring, and liquid level probe at least part and the liquid contact that awaits measuring. In the liquid level sensing device of this embodiment, through setting up the different position contact of the liquid that awaits measuring in a plurality of liquid level probes and the external container, can realize carrying out the multiple spot measurement to the liquid that awaits measuring to improve liquid level sensing device's detection precision, simple structure, excellent in use effect.
Description
Technical Field
The utility model relates to the technical field of liquid level sensors, in particular to a liquid level sensing device.
Background
In industrial production or scientific research, it is often necessary to perform multiple point measurements of the level of a liquid in order to accurately evaluate the actual shape of the liquid. For example, in a thermoacoustic system using a liquid oscillator as a resonance mechanism, the shape of the liquid surface needs to be accurately evaluated due to instability between gas and liquid interfaces, which requires accurate measurement of the liquid level at different positions of the liquid surface.
The common liquid level sensors generally have capacitance type, differential pressure type and the like, but the current capacitance type liquid level sensors and differential pressure type liquid level sensors can only measure the average liquid level value of liquid, and the liquid level values at different positions of the liquid level of the liquid cannot be obtained simultaneously.
Therefore, it is necessary to design a new liquid level detecting device to change the current situation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a liquid level sensing device, which is used for solving the defect that the traditional liquid level sensor cannot simultaneously and accurately measure the liquid level at multiple points.
The utility model provides a liquid level sensing device, comprising:
the sensor bracket is used for connecting an external container, and the external container is used for containing liquid to be measured; and
the liquid level probe is detachably connected to the sensor bracket; the quantity of liquid level probe is a plurality of, and is a plurality of the liquid level probe is followed the sensor support orientation a side surface of the liquid that awaits measuring evenly sets up, the liquid level probe at least part with the liquid contact that awaits measuring.
According to one embodiment of the utility model, the liquid level probe comprises a sensing part and a resistor, wherein one end of the resistor is connected to the sensing part, and the other end of the resistor is grounded; the sensing piece is at least partially contacted with the liquid to be detected and is used for conducting electrons between the resistor and the liquid to be detected when the liquid level of the liquid to be detected is changed.
According to one embodiment of the utility model, the sensing element comprises an electrode, one end of the electrode is connected to the resistor, and the other end of the electrode is at least partially in contact with the liquid to be measured; wherein, the liquid to be measured is non-conductive liquid.
According to one embodiment of the utility model, the electrodes are distinguished from the triboelectric polarity of the liquid to be measured.
According to one embodiment of the present invention, the electrode and the liquid to be measured do not chemically react with each other.
According to one embodiment of the utility model, the sensing element comprises an electrode and a coating layer, the electrode is connected with the resistor, and the coating layer is coated on the outer side of the electrode and used for blocking the liquid to be detected and the electrode; wherein, the liquid to be measured is conductive liquid.
According to one embodiment of the utility model, the coating is distinguishable from the triboelectric polarity of the liquid to be measured.
According to one embodiment of the utility model, the coating is any one of an electret coating, an insulating coating, a semiconductor coating.
According to an embodiment of the present invention, the coating layer and the liquid to be measured do not chemically react with each other.
According to an embodiment of the present invention, the electrode is any one of a gold electrode, a silver electrode, a platinum electrode, an aluminum electrode, a nickel electrode, a copper electrode, a titanium electrode, a chromium electrode, or the electrode is an alloy electrode.
According to an embodiment of the present invention, the liquid level sensing device further comprises a voltage sensor for acquiring a voltage signal across the resistor.
According to one embodiment of the utility model, the sensor support is an annular support, and the liquid level probes are uniformly arranged along the circle center of the annular support.
The embodiment of the utility model has the following beneficial effects:
in the liquid level sensing device of this embodiment, through setting up the different position contact of the liquid that awaits measuring in a plurality of liquid level probes and the external container, can realize carrying out the multiple spot measurement to the liquid that awaits measuring to improve liquid level sensing device's detection precision, simple structure, excellent in use effect.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Wherein:
FIG. 1 is an isometric view of a fluid level sensing apparatus in an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the liquid level sensing apparatus in an embodiment of the present invention;
FIG. 3 is a circuit block diagram of a fluid level sensing apparatus in an embodiment of the present invention;
FIG. 4 is a schematic diagram of the electrical circuit of the fluid level sensing apparatus in an embodiment of the present invention;
FIG. 5 is a circuit block diagram of a fluid level sensing apparatus in another embodiment of the present invention;
FIG. 6 is a schematic diagram of the electrical circuit of the fluid level sensing apparatus in another embodiment of the present invention;
reference numerals:
10. a liquid level sensing device;
100. a sensor holder;
200. a liquid level probe; 210. a sensing member; 211. an electrode; 212. a coating layer; 220. a resistance;
20. an outer container;
30. a liquid to be measured.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present 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.
Referring to fig. 1 and 2, an embodiment of the present invention provides a liquid level sensing apparatus 10, which includes a sensor holder 100 and a liquid level probe 200; the sensor bracket 100 is used for connecting an outer container 20, and the outer container 20 is used for accommodating a liquid 30 to be measured; the level probe 200 is detachably connected to the sensor holder 100; the number of the liquid level probes 200 is plural, and the liquid level probes 200 are uniformly arranged along one side surface of the sensor support 100 facing the liquid 30 to be measured, and at least part of the liquid level probes 200 is in contact with the liquid 30 to be measured.
In the liquid level sensing device 10 of this embodiment, through setting up the different position contacts of the liquid 30 that awaits measuring in a plurality of liquid level probes 200 and the external container 20, can realize carrying out the multiple spot measurement to the liquid 30 that awaits measuring to improve the detection precision of liquid level sensing device 10, simple structure, excellent in use effect.
It should be noted that, in this embodiment, the number of the liquid level probes 200 is N, and N is greater than or equal to 2, and the N liquid level probes 200 are disposed at different positions on the sensor bracket 100, so that the N liquid level probes 200 can contact different positions of the liquid 30 to be measured, so as to implement the function of multi-point measurement of the liquid level sensing apparatus 10.
In the embodiment shown in fig. 1, the number of the liquid level probes 200 is 8, 8 mounting positions corresponding to the liquid level probes 200 one to one are provided on the sensor holder 100, the liquid level probes 200 are disposed in the mounting positions of the sensor holder 100, the outer container 20 is substantially cylindrical, the sensor holder 100 is detachably connected to an inner wall surface of the outer container 20 and is used for fixing the liquid level probes 200, and then at least a part of at least two liquid level probes 200 contacts with the liquid 30 to be measured or is immersed in the liquid 30 to be measured, so as to obtain a liquid level signal of the liquid 30 to be measured. Specifically, in other embodiments, the number of the liquid level probes 200 may be two or more, and is not limited herein.
Specifically, referring to fig. 3, the liquid level probe 200 includes a sensing element 210 and a resistor 220, one end of the resistor 220 is connected to the sensing element 210, and the other end of the resistor 220 is grounded; the sensing element 210 is at least partially in contact with the liquid 30 to be measured and is configured to conduct electrons between the resistor 220 and the liquid 30 to be measured when the level of the liquid 30 to be measured changes.
In this embodiment, when the liquid level of the liquid 30 to be measured changes, electrons may be transferred between the sensing element 210 and the liquid 30 to be measured, so as to form a potential difference, so as to generate a voltage across the resistor 220, and the liquid level change of the liquid 30 to be measured may be sensed through detecting the voltage.
Referring to fig. 3 and 4, in an embodiment, the sensing element 210 includes an electrode 211, one end of the electrode 211 is connected to the resistor 220, and the other end of the electrode 211 at least partially contacts the liquid 30 to be measured; the liquid 30 to be measured is a non-conductive liquid.
In the present embodiment, the triboelectric polarity between the electrode 211 and the liquid 30 to be measured is different; when the liquid level sensing device 10 of the present embodiment is used, before the liquid 30 to be measured is measured, the bottom end of the liquid level probe 200 should be in contact with the liquid 30 to be measured or partially immersed in the liquid 30 to be measured; at this time, because the difference of triboelectric polarities exists between the electrode 211 and the liquid 30 to be measured, electrons are volatilized from the electrode 211, and the liquid 30 to be measured is easy to obtain electrons, so that the electrons have a tendency of transferring from the electrode 211 to the liquid 30 to be measured, and the outer surface of the electrode 211 is charged with positive charges, and the surface of the liquid 30 to be measured in contact with the electrode 211 is charged with equal negative charges.
When the liquid level of the measured point of the liquid 30 to be measured rises, as shown in fig. 4(b), the amount of negative charges accumulated on the liquid surface of the liquid 30 to be measured contacting the electrode 211 increases, the potential on the electrode 211 rises, so that a potential difference is formed between the electrode 211 and the ground, and the positive charges flow from the ground to the electrode 211, so that corresponding voltage signals can be measured at two ends of the resistor 220; at this time, the larger the rising amplitude of the liquid level of the measured point is, the more positive charges flow from the grounding end to the electrode 211, and the larger the voltage at the two ends of the resistor 220 is; because the voltage at the two ends of the resistor 220 is in direct proportion to the liquid level variation of the liquid level of the measured point, the increase of the liquid level of the measured point can be determined according to the voltage variation at the two ends of the resistor 220;
when the liquid level of the measured point of the liquid 30 to be measured is lowered, as shown in fig. 4(d), the amount of negative charges accumulated on the liquid surface of the liquid 30 to be measured contacting the electrode 211 starts to decrease, the potential on the electrode 211 starts to decrease, and therefore, a potential difference is formed between the electrode 211 and the ground, and the positive charges flow from the electrode 211 to the ground. Therefore, opposite voltage signals can be measured at the two ends of the resistor 220, the larger the liquid level drop amplitude of the liquid level of the measured point is, the more positive charges flowing from the electrode 211 to the grounding end are, and the larger the voltage at the two ends of the resistor 220 is; because the voltage at the two ends of the resistor 220 is in direct proportion to the liquid level variation of the liquid level of the measured point, the reduction of the liquid level of the measured point can be determined according to the voltage variation at the two ends of the resistor 220; when the liquid level is maintained, as shown in fig. 4(a) and 4(c), no charge is transferred between the electrode 211 and the ground, so there is no voltage signal across the resistor 220.
The measurement principle of the liquid level of the measured point of the other liquid level probe 200 is the same as that of the liquid level of the measured point, and is not described herein again; the liquid level sensing device 10 can realize the function of multi-point measurement of the non-conductive liquid 30 to be measured, so that the measurement precision of the liquid level is ensured, the structure is simple, and the using effect is good.
Referring to fig. 5 and 6, in another embodiment, the sensor 210 includes an electrode 211 and a coating layer 212, the electrode 211 is connected to the resistor 220, and the coating layer 212 is coated outside the electrode 211 and used for blocking the liquid 30 to be measured and the electrode 211; the liquid 30 to be measured is a conductive liquid. Further, the coating layer 212 is different from the rubbing electrode 211 of the liquid 30 to be measured.
In the present embodiment, the electrode 211 is in non-electrical contact with the liquid 30 to be measured, and the conductive liquid 30 to be measured includes, but is not limited to, liquid metal; when the liquid level sensing apparatus 10 of the present embodiment is used, the difference from the liquid level sensing apparatus 10 of the above-described embodiment is that: in this embodiment, because the triboelectric polarities of the coating layer 212 and the liquid 30 to be measured are different, the coating layer 212 is easy to obtain electrons, and the liquid 30 to be measured is easy to lose electrons, so the electrons have a tendency of transferring from the liquid 30 to be measured to the coating layer 212, and the outer surface of the coating layer 212 is charged with negative charges, and the surface of the liquid 30 to be measured in contact with the coating layer 212 is charged with positive charges in an equal amount;
when the liquid level of the measured point rises, as shown in fig. 6(b), the number of positive charges accumulated on the liquid surface of the liquid 30 to be measured in contact with the coating layer 212 increases, the potential on the electrode 211 decreases, so that a potential difference is formed between the electrode 211 and the ground, and the positive charges flow from the electrode 211 to the ground, so that corresponding voltage signals can be measured at two ends of the resistor 220, and the larger the rising amplitude of the liquid level of the measured point is, the more the positive charges flow from the electrode 211 to the ground is, and the larger the voltage at two ends of the resistor 220 is; because the voltage at the two ends of the resistor 220 is in direct proportion to the liquid level variation of the liquid level of the measured point, the increase of the liquid level of the measured point can be determined according to the voltage variation at the two ends of the resistor 220;
when the liquid level of the liquid surface of the measured point is lowered, as shown in fig. 6(d), the amount of positive charges accumulated on the liquid surface of the liquid 30 to be measured in contact with the coating layer 212 starts to decrease, the potential on the electrode 211 starts to increase, so that a potential difference is formed between the electrode 211 and the ground, and the positive charges flow from the ground end to the electrode 211, so that opposite voltage signals can be measured at the two ends of the resistor 220; the larger the liquid level descending amplitude of the liquid level of the measured point is, the more positive charge flows from the grounding end to the electrode 211, and the larger the voltage at the two ends of the resistor 220 is; because the voltage at the two ends of the resistor 220 is in direct proportion to the liquid level variation of the liquid level of the measured point, the reduction of the liquid level of the measured point can be determined according to the voltage variation at the two ends of the resistor 220. When the liquid level is maintained, as shown in fig. 6(a) and 6(c), no charge is transferred between the electrode 211 and the ground, so there is no voltage signal across the resistor 220.
The measurement principle of the liquid level of the measured point of the other liquid level probe 200 is the same as that of the liquid level of the measured point, and is not described herein again; the liquid level sensing device 10 can realize the function of multi-point measurement of the conductive liquid 30 to be measured by the liquid level sensing device, so that the measurement precision of the liquid level is ensured, the structure is simple, and the using effect is good.
Specifically, the coating 212 is any one of an electret coating, an insulating coating, and a semiconductor coating.
It can be understood that the coating layer 212 made of the above materials can ensure that the coating layer 212 and the liquid 30 to be measured have a large difference in triboelectric polarity, and can enable the coating layer 212 to have good electrostatic charge holding capacity; preferably, the material of the cladding layer 212 may be polytetrafluoroethylene, fluorinated ethylene propylene, polyimide, poly diphenylpropane carbonate, polyoxymethylene, rayon, neoprene, natural rubber, polyethylene, polypropylene, polyvinyl, silicon, germanium, gallium arsenide, cadmium sulfide, etc., without being limited thereto.
In the present embodiment, the coating layer 212 does not chemically react with the liquid 30 to be measured. With this arrangement, it is possible to avoid the influence on the measurement accuracy of the liquid level sensing apparatus 10 due to the chemical reaction between the coating layer 212 and the liquid 30 to be measured, and to avoid the contamination of the liquid 30 to be measured.
Specifically, in the present embodiment, the electrode 211 is any one of a gold electrode, a silver electrode, a platinum electrode, an aluminum electrode, a nickel electrode, a copper electrode, a titanium electrode, and a chromium electrode, or the electrode 211 is an alloy electrode.
With this arrangement, the conductivity of the electrode 211 can be ensured, and the electrode 211 may be made of an alloy of metal such as gold, silver, platinum, aluminum, nickel, copper, titanium, or chromium, which is not limited herein.
Further, the liquid level sensing apparatus 10 further includes a voltage sensor (not shown in the figure) for acquiring a voltage signal across the resistor 220.
It can be understood that, by providing the voltage sensor, the voltage change of the liquid level probe 200 can be sensed in real time, and the liquid level sensing apparatus 10 can also be provided with a control module to collect and calculate the measurement signal obtained by the voltage sensor; specifically, the number of the voltage sensors may be one, and the voltage sensors are in signal connection with the plurality of liquid level probes 200 through one or more paths; the number of the voltage sensors can also be provided in plurality, and the voltage sensors are in signal connection with the liquid level probes 200 in a one-to-one correspondence manner.
Referring to fig. 1, in the present embodiment, the sensor support 100 is an annular support, and the plurality of liquid level probes 200 are uniformly arranged along a circle center of the annular support.
With this arrangement, by providing the sensor holder 100 in a ring shape, the structural strength of the sensor holder 100 can be improved, and by uniformly providing the level probes 200 on the sensor holder 100, the multipoint measurement accuracy of the level sensing apparatus 10 can be ensured.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A liquid level sensing device, comprising:
the sensor bracket is used for connecting an external container, and the external container is used for containing liquid to be measured; and
the liquid level probe is detachably connected to the sensor bracket; the quantity of liquid level probe is a plurality of, and is a plurality of the liquid level probe is followed the sensor support orientation a side surface of the liquid that awaits measuring evenly sets up, the liquid level probe at least part with the liquid contact that awaits measuring.
2. The liquid level sensing device of claim 1, wherein the liquid level probe comprises a sensing element and a resistor, one end of the resistor is connected to the sensing element, and the other end of the resistor is grounded; the sensing piece is at least partially contacted with the liquid to be detected and is used for conducting electrons between the resistor and the liquid to be detected when the liquid level of the liquid to be detected is changed.
3. The liquid level sensing device of claim 2, wherein the sensing element comprises an electrode, one end of the electrode is connected to the resistor, and the other end of the electrode is at least partially in contact with the liquid to be measured; wherein, the liquid to be measured is non-conductive liquid.
4. A liquid level sensing apparatus according to claim 3 wherein the electrode is distinguishable from the triboelectric polarity of the liquid being measured.
5. The liquid level sensing device of claim 3 or 4, wherein the electrode does not chemically react with the liquid to be measured.
6. The liquid level sensing device of claim 2, wherein the sensing element comprises an electrode and a coating layer, the electrode is connected to the resistor, and the coating layer is coated outside the electrode and used for blocking the liquid to be measured and the electrode; wherein, the liquid to be measured is conductive liquid.
7. The fluid level sensor apparatus of claim 6, wherein the coating is distinguishable from the triboelectric polarity of the fluid to be measured.
8. The fluid level sensor apparatus of claim 7, wherein the coating is any one of an electret coating, an insulative coating, and a semiconductor coating.
9. The liquid level sensing device of claim 7 or 8, wherein the coating layer does not chemically react with the liquid to be measured.
10. The liquid level sensing device of claim 3 or 6, wherein the electrode is any one of a gold electrode, a silver electrode, a platinum electrode, an aluminum electrode, a nickel electrode, a copper electrode, a titanium electrode, a chromium electrode, or an alloy electrode.
11. The fluid level sensing apparatus of claim 2, further comprising a voltage sensor for obtaining a voltage signal across the resistor.
12. The fluid level sensing device of claim 1, wherein the sensor support is an annular support and the plurality of fluid level probes are evenly disposed along a center of the annular support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121897745.4U CN216116250U (en) | 2021-08-13 | 2021-08-13 | Liquid level sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121897745.4U CN216116250U (en) | 2021-08-13 | 2021-08-13 | Liquid level sensing device |
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| CN216116250U true CN216116250U (en) | 2022-03-22 |
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| CN202121897745.4U Active CN216116250U (en) | 2021-08-13 | 2021-08-13 | Liquid level sensing device |
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