CN219178675U - Liquid level detection circuit, container and smoke machine - Google Patents
Liquid level detection circuit, container and smoke machine Download PDFInfo
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- CN219178675U CN219178675U CN202222427501.0U CN202222427501U CN219178675U CN 219178675 U CN219178675 U CN 219178675U CN 202222427501 U CN202222427501 U CN 202222427501U CN 219178675 U CN219178675 U CN 219178675U
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Abstract
The utility model discloses a liquid level detection circuit, a container and a smoke machine, wherein the liquid level detection circuit comprises: the pulse signal module is arranged in the container and is provided with a signal output end which is suitable for outputting a pulse signal outwards; the signal receiving module is arranged in the container; the signal receiving module is suitable for being electrically connected with the signal output end through liquid to be detected in the container; the signal output module is electrically connected with the signal receiving module; the signal output module is suitable for outputting a liquid level detection signal outwards. So set up, when the liquid level of the liquid that awaits measuring in the container changes, the signal receiving module also can change with the position of awaiting measuring liquid contact to make liquid level detection signal change, and then can detect different liquid level condition in the container.
Description
Technical Field
The utility model relates to the technical field of liquid level detection, in particular to a liquid level detection circuit, a container and a smoke machine.
Background
The liquid level sensor adopted in the market at present has more types, such as floating ball type, photoelectric type, capacitance type, ultrasonic type and the like. The utility model aims at providing a novel liquid level detection circuit which is used for detecting different liquid level conditions in a container.
Disclosure of Invention
Therefore, the utility model aims to provide a novel liquid level detection circuit and a novel liquid level detection container, which are used for detecting different liquid level conditions in the container.
To achieve the above object, an embodiment of the present utility model provides a liquid level detection circuit including: the pulse signal module is provided with a signal output end, the signal output end is arranged in the container, and the signal output end is suitable for outputting a pulse signal outwards; the signal receiving module is arranged in the container; the signal receiving module is suitable for being electrically connected with the signal output end through liquid to be detected in the container; the signal output module is electrically connected with the signal receiving module; the signal output module is suitable for outputting a liquid level detection signal outwards.
Optionally, the signal receiving module is formed by a plurality of signal receiving points, and the plurality of signal receiving points are arranged in the container along the vertical direction; the signal output module is connected with each signal receiving point.
Optionally, the signal output module includes: one end of each first blocking capacitor is correspondingly connected with the signal receiving point; the output port is connected with the other end of the first blocking capacitor; the output port is adapted to output a liquid level detection signal outwardly.
Optionally, the signal output end is connected with a first conductive sheet, and the first conductive sheet is arranged in the container along the vertical direction; the signal receiving module is composed of a second conductive sheet, and the second conductive sheet is arranged in the container along the vertical direction.
Optionally, the signal output module includes: the first end of the first blocking capacitor is correspondingly connected with the signal receiving point; the output port is connected with the second end of the first blocking capacitor; the output port is adapted to output a liquid level detection signal outwardly.
Optionally, the signal output module further includes: and one end of the low-pass filter is connected with the second end of the first blocking capacitor, and the other end of the low-pass filter is connected with the output port.
Optionally, the low pass filter includes: the first end of the first resistor is connected with the second end of the first blocking capacitor, and the second end of the first resistor is connected with the output port; and one end of the filter capacitor is connected with the second end of the first resistor, and the other end of the filter capacitor is grounded.
Optionally, the pulse signal module includes: the control end of the switching tube is suitable for receiving a control signal, the first end of the switching tube is grounded, and the second end of the switching tube is connected with a power supply through a pull-up resistor; one end of the second blocking capacitor is connected with the second end of the switch tube, the other end of the second blocking capacitor is arranged in the container, and the other end of the second blocking capacitor is the signal output end.
Optionally, the pulse signal module includes: and one end of the second resistor is suitable for receiving a control signal, and the other end of the second resistor is connected with the control end of the switching tube.
Optionally, the control signal is a PWM signal.
The present utility model provides a container comprising: a liquid level detection circuit as in any above embodiments.
Optionally, the container is a tobacco tar cup.
The utility model provides a smoke machine, which comprises the container provided by the utility model.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
1. the embodiment of the utility model provides a liquid level detection circuit, which comprises: the pulse signal module is provided with a signal output end, the signal output end is arranged in the container, and the signal output end is suitable for outputting a pulse signal outwards; the signal receiving module is arranged in the container; the signal receiving module is suitable for being electrically connected with the signal output end through liquid to be detected in the container; the signal output module is electrically connected with the signal receiving module; the signal output module is suitable for outputting a liquid level detection signal outwards.
The signal receiving module is suitable for being electrically connected with the signal output end of the pulse signal module through the liquid to be detected in the container, so that the signal receiving module cannot be electrically connected with the signal output end when the liquid to be detected is not stored in the container; therefore, when the liquid to be detected is stored in the container, the signal receiving module can be electrically connected with the signal output end due to the conductivity of the liquid because of the certain conductivity of the liquid to be detected, so that the pulse signal is transmitted to the signal receiving module through the signal output end, and then the pulse signal is converted into a liquid level detection signal through the signal output module. When the liquid level of the liquid to be detected in the container changes, the contact part of the signal receiving module and the liquid to be detected also changes, so that the liquid level detection signal changes, and further different liquid level conditions in the container can be detected.
2. According to the embodiment of the utility model, the signal receiving module is composed of a plurality of signal receiving points, and the plurality of signal receiving points are arranged in the container along the vertical direction; the signal output module is connected with each signal receiving point, when the liquid level reaches the corresponding signal receiving point, the corresponding signal receiving point is communicated with the signal output end, so that the signal receiving module can generate corresponding liquid level detection signals, and further different liquid level conditions in the container can be detected.
3. According to the embodiment of the utility model, the signal output end is connected with the first conducting strip, and the first conducting strip is arranged in the container along the vertical direction; the signal receiving module is composed of a second conducting strip, the second conducting strip is arranged in the container along the vertical direction, when the liquid to be detected is stored in the container, the first conducting strip and the second conducting strip are placed in the liquid to be detected because of certain conductivity of the liquid to be detected, and the first conducting strip, the second conducting strip and the liquid to be detected form a resistor together. That is, when the liquid level of the liquid to be measured in the container changes, the conductivity of the liquid to be measured naturally also changes, the contact part of the signal receiving module and the liquid to be measured also changes, and the resistance value formed by the first conductive sheet, the second conductive sheet and the liquid to be measured together also changes, so that the liquid level detection signal changes, and further, different liquid level conditions in the container can be detected.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a block diagram of a first implementation of a liquid level detection circuit according to an embodiment of the present utility model;
fig. 2 is a block diagram of a second implementation of the liquid level detection circuit according to the embodiment of the present utility model.
Reference numerals:
1. a pulse signal module; 2. a signal receiving module; 3. a signal output module; 4. a low pass filter; 5. a first conductive sheet;
r1, a second resistor; r2, pull-up resistor; r5, a first resistor; c1, a second blocking capacitor; c9, a filter capacitor; q1, a switching tube.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by a worker of ordinary skill in the art without making any inventive effort, are intended to be within the scope of this utility model based on the embodiments of this utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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 present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present utility model can be understood in a specific case by a worker of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The liquid level sensor adopted in the market at present has more types, such as floating ball type, photoelectric type, capacitance type, ultrasonic type and the like. The utility model aims at providing a novel liquid level detection circuit which is used for detecting different liquid level conditions in a container. The present utility model therefore aims to provide a novel liquid level detection circuit for detecting different liquid level conditions in a container.
Example 1
As shown in fig. 1 to 2, an embodiment of the present utility model provides a liquid level detection circuit, which includes a pulse signal module 1, a signal receiving module 2, and a signal output module 3.
First, the following two points will be described:
①
wherein R is the resistance value of the conductor; ρ is the resistivity of the conductor; s is the cross-sectional area of the conductor; l is the length of the conductor; thus, p, L are proportional to R and S is inversely proportional to R, with the remaining parameters being constant.
(2) The rho of the air is 3 x 10 to the power 13 omega m, and the rho of the kerosene and the diesel oil is 7.3 x 10 to the power 14 omega m.
In particular, in an embodiment of the utility model, the pulse signal module 1 is provided with a signal output, which is arranged in the container, said signal output being adapted to output a pulse signal outwards. The signal receiving module 2 is arranged in the container, and the signal receiving module 2 is suitable for being electrically connected with the signal output end through liquid to be detected in the container. That is, when the liquid to be measured is not stored in the container, the signal receiving module 2 cannot be electrically connected to the signal output terminal. Therefore, when the liquid to be measured is stored in the container and is simultaneously contacted with the signal receiving module 2 and the signal output end, the signal receiving module 2 can be electrically connected with the signal output end due to the fact that certain conductivity exists in the liquid to be measured. Wherein, the resistance value of air is 3 x 10≡13 Ω m, and the resistance value of kerosene and diesel oil is 7.3 x 10≡14Ω·m. And the signal output module 3 is electrically connected with the signal receiving module 2, the signal receiving module 2 transmits a signal to the signal output module 3 after receiving the pulse signal passing through the liquid to be detected, and the signal output module 3 outputs a liquid level detection signal outwards according to the pulse signal passing through the liquid to be detected.
In an embodiment of the present utility model, the side wall of the container may be made of a conductive metal material, and the bottom may be made of an insulating material for containing the liquid. When the side wall of the container is made of conductive metal materials, the container can play a role of shielding a field, and the electric signal inside the container can be prevented from being interfered by the external environment. Of course, the entire container may be constructed of an insulating material.
The present embodiment is merely illustrative of the material constitution of the container, but is not limited thereto, and those skilled in the art can vary depending on the actual situation, and can achieve the same technical effects.
So configured, since the signal receiving module 2 is adapted to be electrically connected to the signal output end of the pulse signal module 1 through the liquid to be measured in the container, when the liquid to be measured is not stored in the container, the signal receiving module 2 cannot be electrically connected to the signal output end; therefore, when the liquid to be detected is stored in the container, the signal receiving module 2 can be electrically connected with the signal output end due to the conductivity of the liquid because of the certain conductivity of the liquid to be detected, so that the pulse signal is transmitted to the signal receiving module 2 through the signal output end, and then the pulse signal is converted into a liquid level detection signal through the signal output module 3. When the liquid level of the liquid to be detected in the container changes, the contact part of the signal receiving module 2 and the liquid to be detected also changes, so that the liquid level detection signal changes, and further different liquid level conditions in the container can be detected.
Further, as a first embodiment of the present utility model, as shown in fig. 1, the signal receiving module 2 may be constituted by a plurality of signal receiving points provided in the container in the vertical direction, and the signal output module 3 may be connected to each of the signal receiving points. Specifically, the signal output module 3 includes a plurality of first blocking capacitors and a plurality of output ports. One end of each first blocking capacitor is correspondingly connected with the signal receiving point, the output ports are correspondingly connected with the other ends of the first blocking capacitors one by one, and the output ports are suitable for outputting liquid level detection signals outwards.
The operation principle of the liquid level detection circuit in fig. 1 is described:
the liquid level of kerosene or diesel oil is detected in the container, and the oil is higher than the air in resistivity due to the difference of the oil resistivity and the air resistivity, so that the liquid level is distinguished.
After the pulse signal generated by the pulse signal module 1 passes through the liquid to be detected, different resistance values are reflected in the container according to different liquid levels. As shown in fig. 1, the first blocking capacitor may include four blocking capacitors, which are a blocking capacitor C2, a blocking capacitor C3, a blocking capacitor C4, a blocking capacitor C5, and a blocking capacitor C6, respectively.
Specifically, when the liquid level of the oil reaches 10ml, the resistance value of the liquid to be measured in the container is R 10ml The pulse signal outputs a liquid level detection signal A through a blocking capacitor C2; when the oil level reaches 20ml, the internal resistance value of the container is R 20ml The pulse signal outputs a liquid level detection signal B through a blocking capacitor C3; when the oil level reaches 30ml, the internal resistance value of the container is R 30ml The pulse signal outputs a liquid level detection signal C through a blocking capacitor C4; when the oil level reaches 40ml, the internal resistance value of the container is R 40ml The pulse signal outputs a liquid level detection signal D through a blocking capacitor C5; when the oil level reaches 50ml, the internal resistance value of the container is R 50ml The pulse signal outputs a liquid level detection signal E through the blocking capacitor C6, so that different signals can be output by different liquid levels.
According to the embodiment of the utility model, the signal receiving module 2 is composed of a plurality of signal receiving points, and the plurality of signal receiving points are arranged in the container along the vertical direction; according to the technical scheme that the signal output module 3 is connected with each signal receiving point, when the liquid level reaches the corresponding signal receiving point, the corresponding signal receiving point is communicated with the signal output end, so that the signal receiving module 2 can generate corresponding liquid level detection signals, and further different liquid level conditions in the container can be detected.
Further, as a second embodiment of the present utility model, the signal output terminal is connected with a first conductive sheet 5, and the first conductive sheet 5 is disposed in the container in a vertical direction. The signal receiving module 2 is constituted by a second conductive sheet which is disposed in the container in the vertical direction. The first conductive sheet 5 is placed in parallel with the second conductive sheet. Specifically, the signal output module 3 includes a first blocking capacitor and an output port. The first end of the first blocking capacitor is correspondingly connected with the signal receiving point, the output port is connected with the second end of the first blocking capacitor, and the output port is suitable for outputting a liquid level detection signal outwards. In a second embodiment of the present utility model, the first blocking capacitor is a blocking capacitor C8.
Further, in the second embodiment of the present utility model, the signal output module 3 further includes a low-pass filter 4, one end of the low-pass filter 4 is connected to the second end of the first blocking capacitor, and the other end of the low-pass filter 4 is connected to the output port. Specifically, the low-pass filter 4 includes a first resistor R5 and a filter capacitor C9, where a first end of the first resistor R5 is connected to a second end of the first blocking capacitor, and a second end of the first resistor R5 is connected to the output port. One end of the filter capacitor C9 is connected with the second end of the first resistor R5, and the other end of the filter capacitor C9 is grounded.
The liquid level detection circuit principle in fig. 2 illustrates:
unlike the first embodiment of the present utility model, the conduction is performed by two parallel metal sheets in the container, and at this time, the lengths L of the first conductive sheet 5 and the second conductive sheet in the container are constant, the ρ resistivity of the oil is constant, and as the liquid level of the oil increases, the cross-sectional area S of the conductor submerged by the oil increases, so that the resistance R in the container decreases.
The pulse signal generated by the pulse signal module 1 is transmitted to a container, passes through a blocking capacitor C8 after passing through the container, and then passes through a low-pass filter 4 formed by a first resistor R5R5 and a filter capacitor C9C9 to output a signal. As the liquid level rises, the resistance R in the vessel decreases and the output current increases. When the liquid level reaches the position a, the output current is larger; when the liquid level reaches the position b, outputting a medium current; when the liquid level reaches the c position, the output current is minimum. Thus, the liquid level can be detected by the difference in the output currents.
According to the embodiment of the utility model, the signal output end is connected with the first conducting strip 5, and the first conducting strip 5 is arranged in the container along the vertical direction; the signal receiving module 2 is formed by a second conductive sheet, and the second conductive sheet is disposed in the container along the vertical direction, when the liquid to be tested is stored in the container, because the liquid to be tested has certain conductivity, the first conductive sheet 5 and the second conductive sheet form a resistor together with the liquid to be tested when the first conductive sheet 5 and the second conductive sheet are placed in the liquid to be tested. That is, when the liquid level of the liquid to be measured in the container changes, the conductivity of the liquid to be measured naturally also changes, the contact position between the signal receiving module 2 and the liquid to be measured also changes, and the resistance value formed by the first conductive sheet 5, the second conductive sheet and the liquid to be measured together also changes, so that the liquid level detection signal changes, and different liquid level conditions in the container can be detected.
Further, in an alternative embodiment of the present utility model, the pulse signal module 1 includes a switching tube Q1 and a second blocking capacitor C1, and a control terminal of the switching tube Q1 is adapted to receive a control signal, where the control signal may be a PWM signal. The first end of the switching tube Q1 is grounded, and the second end of the switching tube Q1 is connected with a power supply through a pull-up resistor R2. One end of the second blocking capacitor C1 is connected with the second end of the switch tube Q1, the other end of the second blocking capacitor C1 is arranged in the container, and the other end of the second blocking capacitor C1 is the signal output end. The pulse signal module 1 further comprises a second resistor R1, one end of the second resistor R1 is suitable for receiving a control signal, and the other end of the second resistor R1 is connected with the control end of the switching tube Q1.
Example 2
Embodiment 1 provides a container comprising: the liquid level detection circuit of embodiment 1. Optionally, the container is the oil cup of the cigarette machine or the water tank of humidifier, can realize the measurement to the volume of the greasy dirt of the inside oil cup of cigarette machine, or the measurement of the inside liquid level of humidifier to the convenience of reminding the user in time to pour oil to the oil cup or add the water operation to the humidifier.
So configured, since the signal receiving module 2 is adapted to be electrically connected to the signal output end of the pulse signal module 1 through the liquid to be measured in the container, when the liquid to be measured is not stored in the container, the signal receiving module 2 cannot be electrically connected to the signal output end; therefore, when the liquid to be detected is stored in the container, the signal receiving module 2 can be electrically connected with the signal output end due to the conductivity of the liquid because of the certain conductivity of the liquid to be detected, so that the pulse signal is transmitted to the signal receiving module 2 through the signal output end, and then the pulse signal is converted into a liquid level detection signal through the signal output module 3. When the liquid level of the liquid to be detected in the container changes, the contact part of the signal receiving module 2 and the liquid to be detected also changes, so that the liquid level detection signal changes, and further different liquid level conditions in the container can be detected.
Example 3
This embodiment provides a range hood comprising the container provided in embodiment 2. The container itself is provided with a liquid level detection circuit. Through the liquid level detection circuit, the volume of the greasy dirt inside the oil cup of the smoke machine can be measured. Meanwhile, the liquid level detection circuit is connected with the controller, the controller is simultaneously connected with the alarm device and the like, and once the data acquired by the liquid level detection circuit exceeds the preset liquid level, the controller can send a signal to the alarm device so as to remind a user, and the user can detach and clean the oil cup after receiving the reminding.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the various aspects of the utility model will be apparent to persons of ordinary skill in the art upon reading the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (13)
1. A liquid level detection circuit, comprising:
the pulse signal module is provided with a signal output end, the signal output end is arranged in the container, and the signal output end is suitable for outputting a pulse signal outwards;
the signal receiving module is arranged in the container; the signal receiving module is suitable for being electrically connected with the signal output end through liquid to be detected in the container;
the signal output module is electrically connected with the signal receiving module; the signal output module is suitable for outputting a liquid level detection signal outwards.
2. The liquid level detection circuit of claim 1, wherein the signal receiving module is comprised of a plurality of signal receiving points, and the signal output module is connected to each of the signal receiving points.
3. The liquid level detection circuit of claim 2, wherein the signal output module comprises:
one end of each first blocking capacitor is correspondingly connected with the signal receiving point;
the output port is connected with the other end of the first blocking capacitor; the output port is adapted to output a liquid level detection signal outwardly.
4. The liquid level detection circuit of claim 2, wherein the signal output is connected to a first conductive sheet, the first conductive sheet being disposed within the container; the signal receiving module is composed of a second conductive sheet, and the second conductive sheet is arranged in the container.
5. The liquid level detection circuit of claim 4, wherein the signal output module comprises:
the first end of the first blocking capacitor is correspondingly connected with the signal receiving point;
the output port is connected with the second end of the first blocking capacitor; the output port is adapted to output a liquid level detection signal outwardly.
6. The liquid level detection circuit of claim 5, wherein the signal output module further comprises:
and one end of the low-pass filter is connected with the second end of the first blocking capacitor, and the other end of the low-pass filter is connected with the output port.
7. The liquid level detection circuit of claim 6, wherein the low pass filter comprises:
the first end of the first resistor is connected with the second end of the first blocking capacitor, and the second end of the first resistor is connected with the output port;
and one end of the filter capacitor is connected with the second end of the first resistor, and the other end of the filter capacitor is grounded.
8. The liquid level detection circuit according to any one of claims 1 to 7, wherein the pulse signal module includes:
the control end of the switching tube is suitable for receiving a control signal, the first end of the switching tube is grounded, and the second end of the switching tube is connected with a power supply through a pull-up resistor;
one end of the second blocking capacitor is connected with the second end of the switch tube, the other end of the second blocking capacitor is arranged in the container, and the other end of the second blocking capacitor is the signal output end.
9. The liquid level detection circuit of claim 8, wherein the pulse signal module comprises:
and one end of the second resistor is suitable for receiving a control signal, and the other end of the second resistor is connected with the control end of the switching tube.
10. The liquid level detection circuit of claim 8, wherein the control signal is a PWM signal.
11. A container, comprising: a liquid level detection circuit as claimed in any one of claims 1 to 10.
12. The container of claim 11, wherein the container is a tobacco tar cup.
13. A smoke machine comprising a container according to any one of claims 11 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222427501.0U CN219178675U (en) | 2022-09-13 | 2022-09-13 | Liquid level detection circuit, container and smoke machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222427501.0U CN219178675U (en) | 2022-09-13 | 2022-09-13 | Liquid level detection circuit, container and smoke machine |
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| Publication Number | Publication Date |
|---|---|
| CN219178675U true CN219178675U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222427501.0U Active CN219178675U (en) | 2022-09-13 | 2022-09-13 | Liquid level detection circuit, container and smoke machine |
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| Country | Link |
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| CN (1) | CN219178675U (en) |
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