CN113108865A - Wireless water level monitoring system - Google Patents
Wireless water level monitoring system Download PDFInfo
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- CN113108865A CN113108865A CN202110367076.8A CN202110367076A CN113108865A CN 113108865 A CN113108865 A CN 113108865A CN 202110367076 A CN202110367076 A CN 202110367076A CN 113108865 A CN113108865 A CN 113108865A
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- electrode plate
- water level
- monitoring system
- level monitoring
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a wireless water level monitoring system, which comprises a shell, wherein a liquid accommodating cavity is arranged in the shell, the bottom of the liquid containing cavity is communicated, the shell is provided with a plurality of capacitive oscillator assemblies from top to bottom, the liquid containing cavity also comprises a plurality of test units, each test unit is connected with the plurality of capacitive oscillator assemblies one by one, the invention realizes the detection of the liquid level height by changing the capacitance according to different water levels, the detection is accurate, and a plurality of tilt sensors are arranged, the total displacement can be obtained by converting the inclination of each tilt sensor into the displacement, therefore, the detection of the whole inclination amount can be realized, the detection precision of the inclination angle can be improved by the arrangement, and in addition, the detection precision of the liquid level can be further improved by the arrangement of the staggered single-capacitor structure, the staggered double-capacitor structure and the staggered double-capacitor structure.
Description
Technical Field
The invention relates to the field of water level monitoring, in particular to a wireless water level monitoring system.
Background
In the foundation pit monitoring engineering, the displacement of soil body pile bodies at different depths is calculated by measuring the deformed shapes of the soil retaining wall plate and the row piles, so that whether a sign and a phenomenon of soil body instability exist or not is monitored; because of being influenced by a plurality of factors such as underground soil property, load condition, construction process and the like, the foundation pit collapse and the deformation of surrounding buildings are easily caused, and potential safety hazards are caused, so that the foundation pit engineering safety construction is scientifically guided by using advanced observation technology and equipment through high-precision monitoring, the potential safety hazards are eliminated, and the safety of lives and properties is ensured to be necessary;
in addition, although the traditional monitoring means starts earlier, the equipment and the measuring method of the traditional monitoring means have certain limitations, so that the traditional monitoring means are complex to operate, large in long-distance monitoring accumulated error, difficult to adapt to complex monitoring environments, prone to interference in long-distance signal transmission, required to be powered remotely, incapable of long-distance real-time online monitoring, high in instrument and labor cost and difficult to apply to bridges, large-scale buildings, dangerous houses, high-speed rails and subways.
Disclosure of Invention
The invention aims to provide a wireless water level monitoring system capable of accurately detecting the liquid level height.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a wireless water level monitoring system, includes the casing, be provided with liquid in the casing and hold the chamber, liquid holds chamber bottom and link up, be provided with a plurality of capacitive oscillator subassemblies from last to down on the casing, still include a plurality of test unit, every the test unit is connected with a plurality of capacitive oscillator subassemblies one-to-one, every test unit is communication connection in proper order.
Through the setting of capacitive oscillator, realize the detection of liquid level height through the water level difference and the principle that changes the electric capacity size to realize the accurate detection of liquid level.
Further, the method comprises the following steps: the shell is also provided with a plurality of inclination angle sensors at intervals, and each inclination angle sensor is connected with the test unit one by one.
Further, the method comprises the following steps: the capacitor oscillator assembly includes a first electrode plate and a second electrode plate disposed opposite each other on a housing.
Further, the method comprises the following steps: the capacitor oscillator assembly comprises a third electrode plate, a fourth electrode plate, a fifth electrode plate and a sixth electrode plate which are arranged on the shell, wherein the third electrode plate and the fourth electrode plate are arranged oppositely, the fifth electrode plate and the sixth electrode plate are arranged oppositely, and the third electrode plate and the fifth electrode plate are arranged in a staggered mode in height.
Further, the method comprises the following steps: the first electrode plate and the second electrode plate are composed of two sub-electrode plates formed by right-angled triangles.
Further, the method comprises the following steps: the third electrode plate, the fourth electrode plate, the fifth electrode plate and the sixth electrode plate are all composed of sub-electrode plates formed by two right-angled triangles.
Further, the method comprises the following steps: the capacitance oscillator assembly comprises a seventh electrode plate, an eighth electrode plate and a common electrode plate which are arranged on the shell (1), so that the seventh electrode plate and the common electrode plate form one capacitance oscillator, and the eighth electrode plate and the common electrode plate form the other capacitance oscillator.
Further, the method comprises the following steps: the capacitance oscillator assembly is located on the surface of the inner cavity body of the shell.
Further, the method comprises the following steps: the wireless communication unit is connected with each test unit through a communication bus.
The invention has the beneficial effects that: the invention realizes the detection of the liquid level height by the principle that the capacitance is changed due to different water levels, is free from electromagnetic interference, has good durability, high measurement precision, no time delay and easy realization of monitoring automation, and the arrangement of a plurality of tilt sensors can obtain the total displacement by converting the inclination of each section of tilt sensor into the displacement, thereby realizing the detection of the whole inclination.
Drawings
Fig. 1 is a schematic view of a wireless water level monitoring system.
Fig. 2 is a schematic diagram of embodiment 1.
Fig. 3 is another schematic structural diagram of the wireless water level monitoring system.
Fig. 4 is a schematic view of the internal structure of the structure shown in fig. 3.
Fig. 5 is a schematic diagram of embodiment 2.
FIG. 6 is a side view of embodiment 2.
Fig. 7 is a schematic diagram of embodiment 3.
Fig. 8 is a schematic diagram of embodiment 4.
Fig. 9 is a schematic diagram of a communication test connection.
FIG. 10 is a schematic diagram of a test cell connection.
FIG. 11 is a schematic view of example 5.
FIG. 12 is a side view of example 5.
Labeled as: the test device comprises a shell 1, a liquid accommodating cavity 2, a test unit 3, a first electrode plate 5, a second electrode plate 6, a third electrode plate 7, a fourth electrode plate 8, a fifth electrode plate 9, a sixth electrode plate 10, a wireless communication unit 11, a seventh electrode plate 12, an eighth electrode plate 13 and a common electrode plate 14.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all 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. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A wireless water level monitoring system as shown in fig. 1, comprising a housing 1, a liquid containing cavity 2 is arranged in the housing 1, the liquid contained in the liquid containing cavity 2 can be a low freezing point solution with high dielectric constant, which is mainly used for measuring the water level of underground water and the water level of rivers, lakes and rivers, or a mixed solution of a low freezing point solution with high dielectric constant and water, such as an automobile antifreeze solution, and the like, wherein the bottom of the liquid accommodating cavity 2 is communicated, the shell 1 is provided with a plurality of capacitive oscillator components from top to bottom, and also comprises a plurality of test units 3, each test unit 3 is connected with a plurality of capacitive oscillator components one by one, each test unit 3 is sequentially connected in a communication way, when the liquid level detector works specifically, the detection of the liquid level height can be realized by the principle that the capacitance is changed due to different water levels, therefore, the accurate detection of the liquid level is realized, and specifically, the capacitance oscillator component has the following forms:
in a first form: as shown in fig. 1, the capacitor oscillator assembly includes a first electrode plate 5 and a second electrode plate 6 oppositely disposed on a housing 1, and as shown in fig. 2, the vertical arrangement of the first electrode plate 5 shown in fig. 2 shows that when the liquid level is at H, the height of the first electrode plate 5 is H, and it is assumed that the capacity of a liquid-filled capacitor is CFThe capacitance of the capacitor not filled with liquid is C0The capacitance of the capacitor we are measuring is C, then:
and adding h to the current bottom height of the capacitor to obtain the liquid level height.
In a second form, as shown in fig. 3 and 4, the capacitor oscillator assembly includes a third electrode plate 7, a fourth electrode plate 8, a fifth electrode plate 9 and a sixth electrode plate 10 disposed on the housing 1, the third electrode plate 7 and the fourth electrode plate 8 are disposed oppositely, the fifth electrode plate 9 and the sixth electrode plate 10 are disposed oppositely, the third electrode plate 7 and the fifth electrode plate 9 are disposed in a staggered manner in height, the third electrode plate 7, the fourth electrode plate 8, the fifth electrode plate 9 and the sixth electrode plate 10 may be located in the same cavity or in different cavities, as shown in fig. 5 and 6, the principle is as shown in fig. 5, and the vertical arrangement diagram of the third electrode plate 7 and the fifth electrode plate 9 shown in fig. 5, when the liquid level is at H, the height of the first electrode plate 5 is H, and if the liquid level is full of the first electrode plate 5, the height is HCapacitor capacity of liquid CFThe capacitance of the capacitor not filled with liquid is C0The capacitance of the capacitor we are measuring is C, then:
the measurement range of each capacitor is controlled to the height of the center of the capacitor in consideration of the non-linearity caused by the edge effect of the capacitor
In the range, i.e. when h is at the height of the centre of the capacitor
Within the range of (1), the height measured by the capacitance is taken to be greater than
Then take the top capacitor of the next column, and lower than the center value
In this way, the capacitance of the upper row and the lower row is taken, and the design can reduce the problem of inaccurate measurement of the capacitor caused by the edge effect.
In a third form, the first electrode sheet 5 and the second electrode sheet 6 are composed of two sub-electrode sheets formed by right triangles, the principle is as shown in fig. 7, and the schematic diagram of the first electrode sheet 5 shown in fig. 7 assumes that when the liquid level is at H, the height of the two right triangles is H, and the width of the bottom surface is H
Assuming that the capacitance values of the two right-angled triangular capacitors are C when the liquid level is 00When the liquid level rises to h, the capacity of the left triangular capacitor is C1The capacity of the right triangular capacitor is C2Then Δ C1＝C1-C0,ΔC2＝C2-C0,
Wherein: the capacitance is given by
Wherein S represents the liquid area, E represents the dielectric constant, d represents the distance between the first electrode sheet 5 and the second electrode sheet 6,
then:
wherein S1 is the area of the liquid level occupied by the left capacitor, and S2 is the area of the liquid level occupied by the right capacitor
Therefore, the first and second electrodes are formed on the substrate,
therefore, the first and second electrodes are formed on the substrate,
the height of the bottom of the capacitor is added to h, namely the height of the liquid level, and tests show that the detection precision can be further improved by adopting the double-capacitance mode.
In a fourth form, the third electrode sheet 7, the fourth electrode sheet 8, the fifth electrode sheet 9 and the sixth electrode sheet 10 in the second form are all composed of two sub-electrode sheets formed by right triangles, as shown in fig. 8, the specific principle and calculation are the same as those described above, and when the double-capacitor group is used specifically, the effective measurement range of each capacitor is controlled to be in the middle point of the double-capacitor group
The mode can ensure the detection precision of the double capacitors, and simultaneously reduce the nonlinear change of capacitance caused by edge effect when the liquid level is at the bottom edge or close to the top of the high capacitor.
In a fifth form, as shown in fig. 11 and 12, the capacitor oscillator assembly includes a seventh electrode plate, an eighth electrode plate and a common electrode plate disposed on the housing 1, such that the seventh electrode plate and the common electrode plate form a capacitor oscillator, and the eighth electrode plate and the common electrode plate form another capacitor oscillator.
In a sixth form, the seventh electrode plate and the eighth electrode plate are each composed of two sub-electrode plates formed by right triangles, and the principle is the same as above, so that the detection accuracy is further enhanced.
On the basis, still be provided with a plurality of inclination sensor at the interval on casing 1, every inclination sensor and test unit 3 be-to-one, specifically when setting up, can set up an inclination sensor at an interval of 1 meter, also can select suitable distance of setting according to actual conditions to can calculate the displacement that reachs each minor segment according to every inclination sensor, reachs total displacement according to the displacement of each minor segment again, thereby can obtain accurate slope offset, measurement accuracy can be guaranteed to this kind of sectional type detection mode.
On the basis of the above, the capacitance oscillator assembly is located on the surface of the cavity body in the housing 1, such as: when the first electrode and the second electrode are both positioned in the inner cavity of the shell 1, the calculation formula of the capacitance is
Therefore, when the first electrode and the second electrode are both positioned in the cavity of the shell 1, the distance of the distance d can be reduced, and therefore the sensitivity of the capacitor is improved, namely the liquid level detection precision is improved.
On the basis, as shown in fig. 9 and 10, the liquid level measuring device further comprises a wireless communication unit 11, wherein the wireless communication unit 11 is connected with each testing unit 3 through a communication bus, each testing unit 3 is connected with a plurality of capacitive oscillator assemblies and inclination sensors one by one, each testing unit 3 is sequentially in communication connection through a single-wire duplex structure, the structure adopts a double-wire bus mode to control and transmit data to each unit, and simultaneously adopts a single-wire duplex mode to sequentially code each testing unit 3, so that the height of the capacitive oscillator at the current liquid level can be known, and when the communication bus is damaged, the single-wire duplex structure can be adopted for standby communication.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A wireless water level monitoring system, its characterized in that: including casing (1), be provided with liquid in casing (1) and hold chamber (2), liquid holds chamber (2) bottom and link up, casing (1) is gone up from last to being provided with a plurality of capacitive oscillator subassemblies extremely down, still includes a plurality of test unit (3), every test unit (3) and a plurality of capacitive oscillator subassembly one-to-one, every test unit (3) communication connection in proper order.
2. A wireless water level monitoring system according to claim 1, wherein: the casing (1) is further provided with a plurality of inclination sensors at intervals, and each inclination sensor is connected with the test unit (3) one by one.
3. A wireless water level monitoring system according to claim 1, wherein: the capacitive oscillator assembly comprises a first electrode plate (5) and a second electrode plate (6) which are oppositely arranged on a shell (1).
4. A wireless water level monitoring system according to claim 1, wherein: the capacitance oscillator assembly comprises a third electrode plate (7), a fourth electrode plate (8), a fifth electrode plate (9) and a sixth electrode plate (10) which are arranged on the shell (1), wherein the third electrode plate (7) and the fourth electrode plate (8) are arranged oppositely, the fifth electrode plate (9) and the sixth electrode plate (10) are arranged oppositely, and the third electrode plate (7) and the fifth electrode plate (9) are arranged in a staggered mode in height.
5. A wireless water level monitoring system according to claim 1, wherein: the capacitance oscillator assembly comprises a seventh electrode plate, an eighth electrode plate and a common electrode plate which are arranged on the shell (1), so that the seventh electrode plate and the common electrode plate form one capacitance oscillator, and the eighth electrode plate and the common electrode plate form the other capacitance oscillator.
6. A wireless water level monitoring system according to claim 3, wherein: the first electrode plate (5) and the second electrode plate (6) are composed of component electrode plates formed by two right-angled triangles.
7. The wireless water level monitoring system of claim 4, wherein: the third electrode plate (7), the fourth electrode plate (8), the fifth electrode plate (9) and the sixth electrode plate (10) are all composed of sub-electrode plates formed by two right-angled triangles.
8. A wireless water level monitoring system according to claim 1, wherein: the capacitance oscillator assembly is positioned on the surface of the inner cavity body of the shell (1).
9. A wireless water level monitoring system according to claim 1, wherein: the device also comprises a wireless communication unit (11), wherein the wireless communication unit (11) is connected with each test unit (3) through a communication bus.
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| CN202110367076.8A CN113108865A (en) | 2021-04-06 | 2021-04-06 | Wireless water level monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394927A (en) * | 2022-01-20 | 2022-04-26 | 汉瑞药业(荆门)有限公司 | Process for preparing 6, 6-dimethyl-3-azabicyclo [3.1.0] hexane-2-carboxylic acid |
| CN116759683A (en) * | 2023-08-24 | 2023-09-15 | 宁德时代新能源科技股份有限公司 | Battery monomer, electrolyte liquid level height testing method, battery and power utilization device |
| CN117782260A (en) * | 2023-11-01 | 2024-03-29 | 杭州九阳小家电有限公司 | Liquid heater for detecting overflow prevention in space |
-
2021
- 2021-04-06 CN CN202110367076.8A patent/CN113108865A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114394927A (en) * | 2022-01-20 | 2022-04-26 | 汉瑞药业(荆门)有限公司 | Process for preparing 6, 6-dimethyl-3-azabicyclo [3.1.0] hexane-2-carboxylic acid |
| CN116759683A (en) * | 2023-08-24 | 2023-09-15 | 宁德时代新能源科技股份有限公司 | Battery monomer, electrolyte liquid level height testing method, battery and power utilization device |
| CN117782260A (en) * | 2023-11-01 | 2024-03-29 | 杭州九阳小家电有限公司 | Liquid heater for detecting overflow prevention in space |
| CN117782260B (en) * | 2023-11-01 | 2024-05-10 | 杭州九阳小家电有限公司 | Liquid heater for detecting overflow prevention in space |
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