CN114034356A - Can mark binary channels electric capacity liquid level detection system and electrical apparatus - Google Patents
Can mark binary channels electric capacity liquid level detection system and electrical apparatus Download PDFInfo
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- CN114034356A CN114034356A CN202111107823.0A CN202111107823A CN114034356A CN 114034356 A CN114034356 A CN 114034356A CN 202111107823 A CN202111107823 A CN 202111107823A CN 114034356 A CN114034356 A CN 114034356A
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- 239000007788 liquid Substances 0.000 title claims abstract description 169
- 238000001514 detection method Methods 0.000 title claims abstract description 60
- 239000003990 capacitor Substances 0.000 claims abstract description 129
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Abstract
The invention relates to a two-channel capacitance liquid level detection system capable of being calibrated and an electric appliance. The system comprises a first capacitor, a second capacitor and a processor, wherein the processor is respectively connected with the first capacitor and the second capacitor, the first capacitor and the second capacitor are arranged on the side wall of a first container, and the first capacitor is positioned above the second capacitor. The processor acquires and monitors a first capacitance value of the first capacitor and a second capacitance value of the second capacitor; if the first capacitance value is in the change, the second capacitance value is used as the full liquid calibration value of the second capacitor; and if the second capacitance value is in change, taking the first capacitance value as the empty calibration value of the first capacitor. According to the invention, through mutual reference between the two capacitors, the empty liquid calibration value and the full liquid calibration value of the capacitors can be calibrated in the use process, so that the empty liquid calibration value and the full liquid calibration value are always kept accurate, and the liquid level detection accuracy is kept.
Description
Technical Field
The invention relates to the field of capacitance liquid level detection, in particular to a calibratable dual-channel capacitance liquid level detection system and an electrical appliance.
Background
Can use the electric capacity to carry out liquid level detection among the prior art, current electric capacity liquid level detection system has only a electric capacity, and the empty liquid calibration value and the full liquid calibration value of calibration electric capacity when dispatching from the factory, can not reset empty liquid calibration value and full liquid calibration value after the installation is used. However, in the actual use process, the inner wall of the container continuously accumulates stains, and in addition, the capacitance per se is aged, so that the capacitance measurement value with the same liquid level is changed, the empty liquid calibration value and the full liquid calibration value set when leaving a factory are not accurate any more, and the state of the liquid in the container cannot be accurately measured.
Disclosure of Invention
The invention aims to solve the technical problem of providing a two-channel capacitance liquid level detection system capable of being calibrated and an electrical appliance aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a calibratable dual-channel capacitance liquid level detection system, which comprises a first capacitor, a second capacitor and a processor, wherein the processor is respectively connected with the first capacitor and the second capacitor, the first capacitor and the second capacitor are used for being arranged on the side wall of a first container, and the first capacitor is positioned above the second capacitor;
the processor acquires and monitors a first capacitance value of the first capacitor and a second capacitance value of the second capacitor; if the first capacitance value is in change, taking the second capacitance value as a full liquid calibration value of the second capacitor; and if the second capacitance value is in change, taking the first capacitance value as an empty liquid calibration value of the first capacitor.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, the changing the first capacitance value includes:
the first capacitance value is gradually increased; or
The first capacitance value is gradually decreased.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, the second capacitance value in change includes:
the second capacitance value is gradually increased; or
The second capacitance value decreases stepwise.
Further, in the two-channel capacitance liquid level detection system capable of calibrating of the present invention, a sum of the empty calibration value of the first capacitance and a first preset capacitance value is used as a full calibration value of the first capacitance.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, the first capacitor is disposed at a top end of a sidewall of the first container, and if a first capacitance value of the first capacitor is not less than a full liquid calibration value of the first capacitor, the first container is full of liquid.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, a difference between a full liquid calibration value of the second capacitance and a second preset capacitance value is used as an empty liquid calibration value of the second capacitance.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, the second capacitor is disposed at a bottom end of a sidewall of the first container, and if a second capacitance value of the second capacitor is not greater than an empty calibration value of the second capacitor, no liquid is in the first container.
Further, in the calibratable dual-channel capacitance liquid level detection system, the processor outputs a detection result.
Furthermore, the system for detecting the liquid level of the capacitor with the two calibratable channels further comprises a liquid injection module connected with the processor, wherein the liquid injection module is used for injecting liquid into the first container, and the processor controls the working state of the liquid injection module according to the detection result; and/or
And the heating module is connected with the processor and used for heating the liquid in the first container, and the processor controls the working state of the heating module according to the detection result.
Furthermore, the system for detecting the liquid level of the capacitor with the two calibratable channels further comprises a display module connected with the processor, and the display module displays the detection result.
Further, in the calibratable dual-channel capacitance liquid level detection system of the present invention, the first container is a pipeline, and the first capacitor and the second capacitor are disposed on a sidewall of the pipeline.
Further, in the two-channel capacitance liquid level detection system capable of calibrating, the pipeline is vertically arranged, and the upper end of the pipeline is communicated to the bottom of the second container.
Further, in the dual-channel capacitance liquid level detection system capable of being calibrated according to the present invention, after calibration, if the first capacitance value or the second capacitance value is in a variation, or the first capacitance value is smaller than a sum of an empty calibration value and a first preset capacitance value of the first capacitance, or the second capacitance value is smaller than a full calibration value of the second capacitance, it is determined that there is no liquid in the second container.
In addition, the invention also provides an electric appliance which comprises the calibrated dual-channel capacitance liquid level detection system.
The invention discloses a two-channel capacitance liquid level detection system capable of being calibrated and an electric appliance, which have the following beneficial effects: according to the invention, through mutual reference between the two capacitors, the empty liquid calibration value and the full liquid calibration value of the capacitors can be calibrated in the use process, so that the empty liquid calibration value and the full liquid calibration value are always kept accurate, and the liquid level detection accuracy is kept.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of a dual-channel capacitance liquid level detection system capable of calibration according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a dual-channel capacitance liquid level detection system capable of calibration according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a dual-channel capacitance liquid level detection system capable of calibration according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a dual-channel capacitance liquid level detection system capable of calibration according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a dual-channel capacitance liquid level detection system capable of calibration according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
In a preferred embodiment, referring to fig. 1, the calibratable dual-channel capacitance liquid level detecting system of the present embodiment includes a first capacitor 10, a second capacitor 20 and a processor 30, wherein the processor 30 is connected to the first capacitor 10 and the second capacitor 20, respectively. The first capacitor 10 and the second capacitor 20 are arranged on the side wall of the first container 40, the first capacitor 10 is located above the second capacitor 20, where the above refers to the direction of the first container 40 in the vertical direction, that is, the direction of the liquid level change, but the first capacitor 10 and the second capacitor 20 are not required to be located at the same vertical position, and the first capacitor 10 and the second capacitor 20 may be located at different vertical positions of the side wall, so that it is only required that the first capacitor 10 is located above the second capacitor 20. Alternatively, the first container 40 may be a first container having a bottom, or a water pipe or the like, and may contain or circulate a liquid. In the present embodiment, the kind of the liquid is not limited, and any liquid may be satisfied.
The calibration process of the two-channel capacitance liquid level detection system capable of being calibrated comprises the following steps: the processor 30 starts to execute the calibration procedure after receiving a calibration instruction, which may be generated by an external control module, such as a key; or processor 30 may generate a calibration command every first predetermined time interval. After the calibration procedure is started, the processor 30 obtains and monitors the first capacitance value of the first capacitor 10 and the second capacitance value of the second capacitor 20, and determines the variation trend of the first capacitance value and the second capacitance value. Alternatively, the processor 30 may continuously obtain the first capacitance value of the first capacitor 10 and the second capacitance value of the second capacitor 20, or obtain the first capacitance value of the first capacitor 10 and the second capacitance value of the second capacitor 20 once every second preset time. After the variation trends of the first capacitance value and the second capacitance value are calculated, if the first capacitance value is in a variation, it indicates that the liquid level is changed at the position corresponding to the first capacitance 10, and because the first capacitance 10 is located above the second capacitance 20, the position corresponding to the second capacitance 20 is always in a full liquid state, the second capacitance value at this time is used as a full liquid calibration value of the second capacitance 20, that is, the corresponding second capacitance value when the first capacitance value is changed is used as a full liquid calibration value of the second capacitance 20. If the second capacitance value is in the change, it indicates that the liquid level is changed at the position corresponding to the second capacitor 20, and since the first capacitor 10 is located above the second capacitor 20, the position corresponding to the first capacitor 10 is always in the empty liquid state, so that the first capacitance value at this time is used as the empty liquid calibration value of the first capacitor 10, that is, the corresponding first capacitance value when the second capacitance value is changed is used as the empty liquid calibration value of the first capacitor 10.
And after calibration is finished, the empty liquid calibration value and the full liquid calibration value are stored in the processor 30 or a memory in communication connection with the processor 30, and the liquid level of the first container 40 is detected according to the calibrated empty liquid calibration value and the calibrated full liquid calibration value when the liquid level is measured. Alternatively, the full liquid calibration and the empty liquid calibration of the first capacitor 10 and the full liquid calibration and the empty liquid calibration of the second capacitor 20 may be stored in the processor 30 or a memory communicatively connected to the processor 30 before the calibration of the dual-channel capacitance liquid level detection system, and the processor 30 performs the liquid level detection using the stored full liquid calibration and the stored empty liquid calibration before the calibration is performed again. After a period of use, dirt is accumulated on the inner wall of the first container 40, and the capacitor itself is aged, the calibration process can be performed to recalibrate the first capacitor 10 and the second capacitor 20, store a new calibration value, and delete a previous calibration value.
This embodiment can mark the empty liquid calibration value and the full liquid calibration value of electric capacity in the use through cross reference between two electric capacities for empty liquid calibration value and full liquid calibration value remain the accuracy throughout, keep the liquid level detection degree of accuracy.
In the calibratable dual channel capacitive liquid level detection system of some embodiments, the first capacitance value in change comprises: the first capacitance value is gradually increased; or the first capacitance value is gradually decreased. Whether the value of the first capacitance 10 is gradually increasing or gradually decreasing, the liquid level is indicated at the position corresponding to the first capacitance 10.
In the calibratable dual channel capacitive liquid level detection system of some embodiments, the second capacitance value in change comprises: the second capacitance value is gradually increased; or the second capacitance value is gradually decreased. Whether the value of the second capacitance 20 is gradually increasing or gradually decreasing, the liquid level is indicated at the position corresponding to the second capacitance 20.
In some embodiments of the calibratable dual-channel capacitive liquid level detecting system, after the above embodiments obtain the empty calibration value of the first capacitor 10, a sum of the empty calibration value of the first capacitor 10 and a first preset capacitance value is used as a full calibration value of the first capacitor 10, where the first preset capacitance value is pre-stored in the processor 30 or a memory communicatively connected to the processor 30.
In some embodiments of the scalable dual channel capacitive liquid level detection system, the first capacitor 10 is disposed at a top end of a sidewall of the first container 40, and if the first capacitance value of the first capacitor 10 is not less than the full liquid calibration value of the first capacitor 10, it indicates that a position corresponding to the first capacitor 10 is full of liquid, and thus the first container 40 is full of liquid.
In some embodiments of the scalable dual channel capacitive liquid level detection system, after the full liquid calibration value of the second capacitor 20 is obtained in the above embodiments, the difference between the full liquid calibration value of the second capacitor 20 and a second preset capacitance value is used as the empty liquid calibration value of the second capacitor 20, wherein the second preset capacitance value is pre-stored in the processor 30 or a memory communicatively connected to the processor 30.
In some embodiments of the scalable dual-channel capacitive liquid level detection system, the second capacitor 20 is disposed at the bottom end of the sidewall of the first container 40, and if the second capacitance value of the second capacitor 20 is not greater than the empty calibration value of the second capacitor 20, it indicates that there is no liquid in the corresponding position of the second capacitor 20, and thus, it indicates that there is no liquid in the first container 40.
In some embodiments of the calibratable dual channel capacitive liquid level sensing system, the processor 30 outputs the sensing result, which is the liquid level position information in the first container 40, and the sensing result can be used as the input control information of other devices to realize the related function control.
Referring to fig. 2, the calibratable dual-channel capacitance liquid level detection system of some embodiments further includes a liquid injection module 50 connected to the processor 30, the liquid injection module 50 is configured to inject liquid into the first container 40, and the processor 30 controls an operating state of the liquid injection module 50 according to a detection result. If the detection result shows that the second capacitance value of the second capacitor 20 is not greater than the empty calibration value of the second capacitor 20, it indicates that there is no liquid at the corresponding position of the second capacitor 20, and further indicates that there is no liquid in the first container 40, at this time, the processor 30 controls the liquid injection module 50 to start injecting liquid into the first container 40. If the detection result shows that the first capacitance value of the first capacitor 10 is not less than the full liquid calibration value of the first capacitor 10, it indicates that the corresponding position of the first capacitor 10 is full of liquid, and further indicates that the first container 40 is full of liquid, and at this time, the processor 30 controls the liquid injection module 50 to stop injecting liquid into the first container 40.
Referring to fig. 3, the calibratable dual-channel capacitive liquid level sensing system of some embodiments further includes a heating module 60 connected to the processor 30, the heating module 60 being configured to heat the liquid in the first container 40, and the processor 30 controlling an operating state of the heating module 60 according to the sensing result. If the detection result shows that the second capacitance value of the second capacitor 20 is not greater than the empty liquid calibration value of the second capacitor 20, it indicates that no liquid exists at the corresponding position of the second capacitor 20, and further indicates that no liquid exists in the first container 40, at this time, the processor 30 controls the heating module 60 to stop heating, so that the device is prevented from being damaged when the device is heated without the liquid. Alternatively, if the detection result shows that the second capacitance value of the second capacitor 20 is not greater than the empty calibration value of the second capacitor 20, it indicates that there is no liquid at the corresponding position of the second capacitor 20, and further indicates that there is no liquid in the first container 40, and at this time, the processor 30 may control the whole device to enter a sleep state, a standby state, or a shutdown state, so as to prevent other devices from being damaged due to the absence of liquid.
Referring to FIG. 4, the calibratable dual-channel capacitive liquid level detection system of some embodiments further includes a display module 70 connected to the processor 30, the display module 70 displaying the detection result. Alternatively, the display module 70 may be a display screen, an indicator light, an audio player, or the like, for example, the display screen is used to display the detection result, the color or number of the indicator light is used to display the detection result, or the audio player is used to play the detection result.
Referring to FIG. 5, in some embodiments of the calibratable dual channel capacitive liquid level sensing system, the first container 40 is a pipe 401, and the first capacitor 10 and the second capacitor 20 are configured to be disposed on a sidewall of the pipe 401. Alternatively, the conduit 401 is vertically disposed, where the vertical disposition may be entirely vertical, or may be inclined; the upper end of the pipe 401 communicates to the bottom of the second container 402. After the calibration of the first capacitor 10 and the second capacitor 20 is completed, whether liquid exists in the second container 402 can be judged through the first capacitance value or the second capacitance value, if the first capacitance value or the second capacitance value is in a change, or the first capacitance value is smaller than the sum of an empty liquid calibration value of the first capacitor 10 and a first preset capacitance value, or the second capacitance value is smaller than a full liquid calibration value of the second capacitor 20, it is indicated that the liquid level is at a position on the pipeline 401 corresponding to the first capacitor 10 or the second capacitor 20, and then it is indicated that no liquid exists in the second container 402.
In a preferred embodiment, the electrical apparatus of the present embodiment includes a calibratable dual-channel capacitance liquid level detection system as described in the above embodiments.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (14)
1. A calibratable dual-channel capacitance liquid level detection system is characterized by comprising a first capacitor (10), a second capacitor (20) and a processor (30), wherein the processor (30) is respectively connected with the first capacitor (10) and the second capacitor (20), the first capacitor (10) and the second capacitor (20) are arranged on the side wall of a first container (40), and the first capacitor (10) is positioned above the second capacitor (20);
the processor (30) acquires and monitors a first capacitance value of the first capacitor (10) and a second capacitance value of the second capacitor (20); if the first capacitance value is in change, the second capacitance value is used as a full liquid calibration value of the second capacitor (20); and if the second capacitance value is in change, taking the first capacitance value as a null liquid calibration value of the first capacitor (10).
2. The calibratable dual-channel capacitive liquid level detecting system of claim 1, wherein the first capacitance value in change comprises:
the first capacitance value is gradually increased; or
The first capacitance value is gradually decreased.
3. The calibratable dual-channel capacitive liquid level detecting system of claim 1, wherein the second capacitance value in change comprises:
the second capacitance value is gradually increased; or
The second capacitance value decreases stepwise.
4. The calibratable dual-channel capacitive liquid level detecting system according to claim 1, wherein a sum of an empty calibration value of the first capacitor (10) and a first preset capacitance value is taken as a full calibration value of the first capacitor (10).
5. The scalable dual channel capacitive liquid level sensing system of claim 4, wherein the first capacitor (10) is disposed at a top end of a sidewall of a first container (40), the first container (40) being filled with a liquid if a first capacitance value of the first capacitor (10) is not less than a liquid full calibration value of the first capacitor (10).
6. The calibratable dual-channel capacitive liquid level detecting system according to claim 1, wherein a difference between a full liquid calibration value and a second preset capacitance value of the second capacitor (20) is used as an empty liquid calibration value of the second capacitor (20).
7. The scalable dual channel capacitive liquid level sensing system of claim 6, wherein the second capacitor (20) is disposed at a bottom end of a sidewall of the first container (40), and wherein no liquid is present in the first container (40) if the second capacitance value of the second capacitor (20) is not greater than the empty calibration value of the second capacitor (20).
8. The calibratable dual-channel capacitive liquid level sensing system of claim 5 or 7, wherein the processor (30) outputs a sensing result.
9. The calibratable dual-channel capacitive liquid level detection system according to claim 8, further comprising a liquid injection module (50) connected to the processor (30), wherein the liquid injection module (50) is configured to inject liquid into the first container (40), and the processor (30) controls an operating state of the liquid injection module (50) according to the detection result; and/or
A heating module (60) connected to the processor (30), the heating module (60) being configured to heat the liquid in the first container (40), the processor (30) controlling an operating state of the heating module (60) according to the detection result.
10. The calibratable dual-channel capacitive liquid level detection system of claim 8, further comprising a presentation module (70) connected to the processor (30), the presentation module (70) presenting the detection result.
11. The calibratable dual-channel capacitive liquid level detecting system according to claim 1, wherein the first container (40) is a pipe (401), and the first capacitor (10) and the second capacitor (20) are configured to be disposed on a side wall of the pipe (401).
12. The calibratable two-channel capacitive liquid level detection system of claim 11, wherein the pipe (401) is vertically disposed, and an upper end of the pipe (401) is communicated to a bottom of the second container (402).
13. The calibratable dual-channel capacitive liquid level sensing system of claim 12, wherein after calibration, if either the first capacitance value or the second capacitance value is in change, or the first capacitance value is less than a sum of an empty calibration value and a first predetermined capacitance value of the first capacitor (10), or the second capacitance value is less than a full calibration value of the second capacitor (20), then there is no liquid in the second container (402).
14. An electrical appliance comprising a calibratable dual channel capacitive liquid level sensing system according to any one of claims 1 to 13.
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| CN113155234A (en) * | 2021-04-25 | 2021-07-23 | 上海钛米机器人股份有限公司 | Liquid level detection system, method, device, computer device and readable storage medium |
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| CN203396450U (en) * | 2013-05-29 | 2014-01-15 | 田强 | Novel capacitive sensor |
| CN107478295A (en) * | 2017-07-28 | 2017-12-15 | 深圳市鼎丰泰达科技有限公司 | A kind of method and device that liquid level data is obtained in capacitance level transducer |
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