CN112304388B - Water level detection method and device - Google Patents
Water level detection method and device Download PDFInfo
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- CN112304388B CN112304388B CN202011116061.6A CN202011116061A CN112304388B CN 112304388 B CN112304388 B CN 112304388B CN 202011116061 A CN202011116061 A CN 202011116061A CN 112304388 B CN112304388 B CN 112304388B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 239000000523 sample Substances 0.000 claims abstract description 35
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000005484 gravity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- G01F23/0023—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 with a probe suspended by a wire or thread
-
- 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
- G01F23/80—Arrangements for signal processing
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a water level detection method, which is used for a water container and comprises the following steps: acquiring a plane equation of the bottom surface of the water container in an initial state; judging whether a preset inclination condition of the water container is met or not according to a plane equation of the bottom surface of the water container; if the plane equation of the bottom surface of the water container meets the preset inclination condition of the water container, determining a water level threshold value according to the current inclination angle of the water container; and detecting the water level according to the determined water level threshold. A water level detection device is also disclosed. According to the water level detection method provided by the invention, the movable water level probe is arranged at the top of the water level detection device, when the water level detection device is inclined, the full liquid level height of the water level detection device during inclination is calculated, the water level probe is lowered to the full liquid level height during inclination, and when the probe receives a signal, the water level detection device gives an alarm, so that misjudgment during inclination of the water level detection device is avoided, and the accuracy of water level detection is improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a water level detection method and device.
Background
The device for collecting water in the household appliance is a water container, when a certain amount of water is accumulated in the water container, a user needs to be reminded to clear or directly cut off the power supply of the household appliance so as to prevent the water from overflowing from the water container to damage the indoor environment, so that the detection of the water fullness in the water container is particularly important.
The existing method for detecting the water fullness of the water container is to detect the weight of the water container by using a gravity sensor and judge the water fullness condition of the water container according to the weight of the water container. If the water level of the water container is detected inaccurately, the situation of inaccurate judgment can occur when the water container is placed in an inclined state.
Disclosure of Invention
The invention aims to provide a water level detection method and a water level detection device, which are used for solving the technical problem that the water fullness of a water container cannot be judged when the water container is inclined in the background technology.
In order to achieve the above purpose, the specific technical scheme of the water level detection method and device of the invention is as follows:
a water level detection method for a water container, comprising:
acquiring a plane equation of the bottom surface of the water container in an initial state;
judging whether a preset inclination condition of the water container is met or not according to a plane equation of the bottom surface of the water container;
if the plane equation of the bottom surface of the water container meets the preset inclination condition of the water container, determining a water level threshold value according to the current inclination angle of the water container;
and detecting the water level according to the determined water level threshold.
Further, the step of obtaining the plane equation of the bottom surface of the water container in the initial state comprises the following steps: when the water container is placed in a horizontal position, any three-point coordinates of the bottom surface of the water container are obtained, and a plane equation of the bottom of the water container is determined through three points which are not on the same straight line in space.
Further, the obtaining of the plane equation of the bottom surface of the water container in the initial state specifically includes: when water is not added, any three-point coordinates of the bottom surface of the water container are obtained, and a plane equation of the bottom of the water container is determined.
Further, the step of judging whether the preset inclination condition of the water container is met according to the plane equation of the bottom surface of the water container specifically comprises the following steps: and calculating an included angle between a bottom plane equation of the water container and the bottom plane equation of the water container in a preset horizontal state, and if the included angle is more than 0 degree, judging that the water container is obliquely placed.
Further, if the plane equation of the bottom surface of the water container meets the preset inclination condition of the water container, the determining the water level threshold according to the current inclination angle of the water container specifically comprises: when the included angle between the bottom plane equation of the water container and the bottom plane equation of the water container in the preset horizontal state is more than 0 degree, the inclination condition of the water container is met; acquiring a plane equation of a top opening plane of the water container, the height of the water container and a point three-dimensional coordinate of the top wall of the water container; and acquiring the distance between the horizontal plane and the plane of the water level threshold value in the vertical direction by taking the point as the horizontal plane according to the parameters.
Further, the water level detection according to the determined water level threshold specifically includes: the water level threshold value is the height that the probe descends to the water level threshold value from three-dimensional coordinate origin, confirms the full level of water, detects water level signal when the probe is in this position, can report to the police and remind the user.
A water level detecting device comprising:
the detection module is used for detecting the coordinates of any point on the bottom surface of the water container;
the judging module is used for judging whether the preset inclination condition of the water container is met or not according to the plane equation of the bottom surface of the water container;
the calculation module is used for determining a water level threshold according to the current inclination angle of the water container;
and the control module is used for detecting the water level according to the determined water level threshold value.
Furthermore, the detection module is a three-dimensional detection probe, the probe is arranged on a three-dimensional detection device, the three-dimensional detection device is arranged on the lower surface of the top cover of the water container, and the bottom of the three-dimensional detection device is provided with the probe capable of moving in a telescopic mode.
Further, the initial position of the three-dimensional detection device is set as the three-dimensional coordinate origin at the center of the water container.
And the water level in the water container reaches the highest water level, and corresponding alarm information is sent out.
The water level detection method and the water level detection device have the following advantages that:
the invention provides a water level detection method, wherein a movable water level probe is arranged at the top of a water level detection device, the movable water level probe is a three-dimensional moving probe, the probe can move on a three-dimensional coordinate and record the three-dimensional coordinate of a moving point, the three-dimensional coordinate of each point in a water container can be detected in real time through the measurement of the three-dimensional moving probe, when the water level detection device inclines, the full liquid level height of the water level detection device during the inclination is calculated through a certain algorithm, the full liquid level height of the water level probe during the inclination is reduced, when the probe receives a signal, the water level detection device gives an alarm, the misjudgment during the inclination of the water level detection device is avoided, and the accuracy of the water level detection is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a water level detection method according to the present invention;
fig. 2 is a schematic structural view of the water level detecting apparatus of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The water level detection method provided in the embodiment of the invention is suitable for water level detection methods of water containers, such as household appliances needing water to be added into the water containers, such as a dehumidifier and a humidifier, and the water level detection method is not particularly limited herein, as long as the water containers are arranged in the household appliances for adding water.
Fig. 1 schematically shows a flow chart of a water level detection method according to an embodiment of the present invention. Referring to fig. 1, the water level detection method provided by the embodiment of the present invention specifically includes steps S11 to S14, as follows:
and S11, acquiring a plane equation of the bottom surface of the water container in the initial state.
The embodiment of the invention detects the water full alarm of the water container, can measure the water full state through the liquid level sensor or the gravity sensor in the process of placing the water container horizontally, and can alarm to remind a user of water full when the water level reaches the water level threshold value. When a water container placed by a user is possibly in an inclined state, the water level threshold value detected by the liquid level sensor or the gravity sensor is not the water full level in the true inclined state, and the situation that no alarm is given after the water is filled can occur.
Before the whole machine is started, when the water container is placed horizontally, any three-point coordinate of the bottom surface of the water container is obtained, and the plane equation A1x + B1y + C1z + D1 of the bottom of the water container is determined to be 0 through three points which are not on the same straight line in space.
And S12, judging whether the preset inclination condition of the water container is met according to the plane equation of the bottom surface of the water container.
In an initial state, when water is not added, acquiring any three-point coordinate of the bottom surface of the water container, specifically, when the whole machine is started, detecting any three-point coordinate S0(x1, y1, z1), S1(x2, y2, z2) and S2(x3, y3, z3) of the bottom surface of the water container by a probe; the equation Ax1+ By1+ Cz1+ D1 is 0 determined By three points which are not on the same straight line in space.
The inclined condition of the water container comprises: and calculating an included angle alpha between a bottom plane equation of the water container and the bottom plane equation of the water container in a preset horizontal state, judging that the water container is placed horizontally if the included angle alpha is 0 degree, and judging that the water container is placed obliquely if the included angle alpha is more than 0 degree.
And when the included angle alpha between the bottom plane equation of the water container and the bottom plane equation of the water container in the preset horizontal state is more than 0 degree, the inclination condition of the water container is met.
And S13, if the plane equation of the bottom surface of the water container meets the preset inclination condition of the water container, determining a water level threshold according to the current inclination angle of the water container.
And if the plane equation of the water container is judged to meet the preset inclination condition of the water container, confirming that the water container is inclined, and if the water container is not horizontally arranged, adjusting the water level threshold value in the inclined state at the moment to detect the water fullness.
In step S2, an angle α between the bottom plane equation of the water container and the bottom plane equation of the water container in the preset horizontal state is calculated, and the water level plane equation in the water container, namely Cz2+ D2, is 0.
According to the plane equation of the bottom surface of the water container, the plane equation of the top opening plane of the water container can be calculated, the height of the water container is measured when the water container is placed horizontally initially, the height of the water container is set to be H, namely the plane equation of the top opening plane of the water container is determined, the inclination direction of the water container can be determined, the three-dimensional coordinate of one point of the top wall of the water container can be determined, the distance between the point and the plane of the water level threshold value in the vertical direction by taking the point as the horizontal plane can be obtained, namely the probe is lowered to the height to be the full height of water. Tan alpha is the ratio of the water level threshold value to a, and a is the distance between one point of the top wall of the water container and the X direction.
And S14, detecting the water level according to the determined water level threshold value.
And determining a water level according to the water level threshold determined in the step S3, namely the descending height of the probe, and when the probe detects a water level signal at the position, alarming to prove that the water container at the position is full of water to remind a user.
According to the water level detection method provided by the embodiment of the invention, no matter where the water container is located, the water level threshold value can be obtained through calculation and analysis of the above embodiment, the condition that the water container is full of water is confirmed according to the water level threshold value, the water level detection accuracy is improved, no cost is increased, and the market competitiveness of the product is effectively improved.
For simplicity of explanation, the method embodiments are described as a series of acts or combinations, but those skilled in the art will appreciate that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the embodiments of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Fig. 2 schematically shows a structural view of a water level detecting apparatus according to an embodiment of the present invention. Referring to fig. 2, the water level detection apparatus of the embodiment of the present invention specifically includes a detection module, a calculation module, a judgment module, and a control module, wherein:
and the detection module is used for detecting any three-point coordinates of the bottom surface of the water container.
Specifically, the detection module is a three-dimensional detection probe, the probe is arranged on a three-dimensional detection device, the three-dimensional detection device is arranged on the lower surface of the top cover of the water container, and the bottom of the three-dimensional detection device is provided with the probe capable of moving in a telescopic mode, so that the probe can move in any direction of XYZ, the moving coordinate can be obtained, and the three-dimensional coordinate of any point in the water container can be determined.
And the judging module is used for judging whether the preset inclination condition of the water container is met or not according to the plane equation of the bottom surface of the water container.
The calculation module is used for determining a water level threshold according to the current inclination angle of the water container;
and the control module is used for detecting the water level according to the determined water level threshold value.
The water level control device also comprises an alarm module which sends out corresponding alarm information when the water level in the water container reaches the highest water level.
The invention provides a water level detection method, wherein a movable water level probe is arranged at the top of a water level detection device, the movable probe is a three-dimensional moving probe, the probe can move on a three-dimensional coordinate and record the three-dimensional coordinate of a moving point, the three-dimensional coordinate of each point in a water container can be detected in real time through the measurement of the three-dimensional moving probe, when the water level detection device inclines, the full liquid level height of the water level detection device during the inclination is calculated through a certain algorithm, the full liquid level height of the water level probe during the inclination is reduced to the full liquid level height during the inclination, when the probe receives a signal, the water level detection device gives an alarm, the misjudgment during the inclination of the water level detection device is avoided, and the accuracy of the water level detection is improved.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A water level detection method for a water container is characterized by comprising the following steps:
acquiring a plane equation A1x + B1y + C1z + D1=0 of the bottom surface of the water container in the initial state;
judging whether a preset inclination condition of the water container is met or not according to a plane equation of the bottom surface of the water container, and calculating an included angle between the plane equation of the bottom surface of the water container and the plane equation of the bottom surface of the water container in a preset horizontal state;
if the plane equation of the bottom surface of the water container meets the preset inclination condition of the water container, determining a water level threshold value according to the current inclination angle of the water container;
and determining the water full plane according to the height of the probe from the three-dimensional coordinate origin to the water level threshold.
2. The water level detecting method according to claim 1, wherein the step of obtaining the plane equation of the bottom surface of the water container in the initial state comprises: when the water container is placed in a horizontal position, any three-point coordinates of the bottom surface of the water container are obtained, and a plane equation of the bottom of the water container is determined through three points which are not on the same straight line in space.
3. The water level detection method according to claim 1, wherein the obtaining of the plane equation of the bottom surface of the water container in the initial state specifically comprises: and acquiring any three-point coordinates of the bottom surface of the water container, and determining a plane equation of the bottom of the water container.
4. The water level detection method according to claim 1, wherein if an angle between a bottom plane equation of the water container and a bottom plane equation of the water container in a preset horizontal state is greater than 0 °, it is determined that the water container is placed obliquely.
5. The method as claimed in claim 1, wherein if the plane equation of the bottom surface of the water container satisfies a preset inclination condition of the water container, the determining the water level threshold according to the current inclination angle of the water container specifically comprises: when the included angle between the bottom plane equation of the water container and the bottom plane equation of the water container in the preset horizontal state is more than 0 degree, the inclination condition of the water container is met; acquiring a plane equation of a top opening plane of the water container, the height of the water container and a three-dimensional coordinate of any point of the top wall of the water container; and acquiring the distance between the horizontal plane and the plane of the water level threshold value in the vertical direction by taking the point as the horizontal plane according to the parameters.
6. A water level detection apparatus, comprising:
the detection module is used for detecting the coordinates of any point on the bottom surface of the water container;
the judging module judges whether the preset inclination condition of the water container is met or not according to a plane equation A1x + B1y + C1z + D1=0 of the bottom surface of the water container, and calculates an included angle between the plane equation of the bottom surface of the water container and the plane equation of the bottom surface of the water container in a preset horizontal state;
the calculation module is used for determining a water level threshold according to the current inclination angle of the water container;
and the control module determines the water level according to the height of the probe from the three-dimensional coordinate origin to the water level threshold.
7. The water level detecting device according to claim 6, wherein the detecting module is a three-dimensional detecting probe, the probe is arranged on the three-dimensional detecting device, the three-dimensional detecting device is arranged on the lower surface of the top cover of the water container, and the probe which can move telescopically is arranged at the bottom of the three-dimensional detecting device.
8. The water level detecting apparatus according to claim 7, wherein an initial position of the three-dimensional detecting apparatus is set to a three-dimensional origin of coordinates at a center of the water container.
9. The water level detecting device according to claim 6, further comprising an alarm module for giving a corresponding alarm when the water level in the water container reaches a maximum level.
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| CN202011116061.6A CN112304388B (en) | 2020-10-19 | 2020-10-19 | Water level detection method and device |
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