Liquid level detection device, liquid level detection system, and liquid level detection method

Abstract

The embodiment of the application discloses a liquid level detection device, a liquid level detection system and a liquid level detection method, and belongs to the technical field of data detection. The liquid level detection device comprises an outer cavity, an inner cavity, a control device and a plurality of electromagnetic coils, the inner cavity comprises a liquid inlet arranged on one side; the plurality of electromagnetic coils are sequentially arranged between the outer cavity and the inner cavity; the liquid inlet is used for immersing the liquid at a target site into the inner cavity, so that the current of at least one electromagnetic coil changes; the control device is used for determining the current liquid level of the target site according to the current state of each electromagnetic coil. In the process of determining the liquid level through the current change of the electromagnetic coil, the liquid only immerses into the inner cavity and does not immerse into the outer cavity. By avoiding the influence of foreign matters in the liquid on the obtained liquid level value, a more accurate liquid level can be obtained. At the same time, since the contact between the liquid and the electromagnetic coil is avoided, the durability of the device is further improved.

Description

Technical Field

[0001] This application relates to the field of data detection technology, specifically to a liquid level detection device, a liquid level detection system, and a liquid level detection method. Background Technology

[0002] With the rapid development of detection technology, level gauges are widely used in many fields such as water conservancy irrigation, farmland irrigation, and flood control and drainage. A level gauge is an instrument used to detect the position and boundary of a liquid. It measures and records the level of the liquid through different working principles. Common distance measurement principles of level gauges include ultrasonic distance measurement, laser distance measurement, barometric distance measurement, and electromagnetic contact distance measurement.

[0003] When a level gauge operates on the principle of ultrasonic or laser ranging, it is typically a tubular type. The presence of foreign objects such as spider webs within the tubing will prevent the gauge from providing accurate level readings. When a level gauge operates on the principle of electromagnetic contact ranging, the gauge's water level gauge needs to be in direct contact with the liquid. In turbid liquids in farmland, a large amount of foreign matter can easily adhere to the gauge's water level gauge, affecting the reading. Therefore, when level gauges are used in practical scenarios such as farmland level detection, they are often affected by the presence of foreign matter, resulting in inaccurate level readings. Summary of the Invention

[0004] The purpose of this application is to provide a liquid level detection device, a liquid level detection system, and a liquid level detection method to solve the problem in the prior art that accurate liquid level readings cannot be obtained due to the influence of attached foreign matter.

[0005] To achieve the above objectives, the first aspect of this application provides a liquid level detection device, which includes an outer cavity, an inner cavity, a control device, and a plurality of electromagnetic coils. The inner cavity includes a liquid inlet disposed on one side.

[0006] Multiple electromagnetic coils are sequentially arranged between the outer cavity and the inner cavity;

[0007] The liquid inlet is used to allow liquid from the target location to be immersed into the inner cavity, so as to change the current of at least one electromagnetic coil.

[0008] A control device is used to determine the current liquid level at the target location based on the current state of each electromagnetic coil.

[0009] In the embodiments of this application, the control device includes a control circuit and a Hall electromagnetic switch;

[0010] Hall effect electromagnetic switches are used to respond to user operations and control the on / off state of control circuits.

[0011] The control circuit is used to acquire the current state of each electromagnetic coil and determine the current liquid level at the target location based on the current state of each electromagnetic coil.

[0012] In embodiments of this application, a control circuit is used to acquire the current state of each electromagnetic coil and determine the current liquid level at the target location based on the current state of each electromagnetic coil, including:

[0013] The control circuit is used to acquire the current state of each electromagnetic coil and determine whether the current state of each electromagnetic coil has changed.

[0014] The electromagnetic coil whose current state changes is identified as the target electromagnetic coil.

[0015] The current liquid level at the target location is determined based on the height corresponding to the target electromagnetic coil.

[0016] In the embodiments of this application, the liquid level detection device further includes a shielding shell, with both the outer cavity and the inner cavity disposed inside the shielding shell;

[0017] A shielding housing is used to shield external electromagnetic signals from liquid level detection equipment.

[0018] In the embodiments of this application, the liquid level detection device further includes a detachable base, and both the outer cavity and the inner cavity are disposed on the detachable base;

[0019] The detachable base is used to secure the liquid level detection equipment to the target location.

[0020] The second aspect of this application provides a liquid level detection system, which includes a central control device and at least two of the above-mentioned liquid level detection devices;

[0021] Each liquid level detection device is used to obtain the current liquid level at a target location, where the target location is any location within the target area;

[0022] The central control equipment is used to receive the current liquid level at each target location and calculate the average liquid level of all target locations to obtain the average liquid level of the target area.

[0023] In the embodiments of this application, the control device of each liquid level detection device includes a communication circuit;

[0024] The communication circuit is used to send the current liquid level at the target location to the central control device, or to send the current liquid level at the target location to another liquid level detection device.

[0025] In the embodiments of this application, at least two liquid level detection devices include at least one first liquid level detection device and one second liquid level detection device;

[0026] The communication circuit of the first liquid level detection device includes a short-range communication device, and the communication circuit of the second liquid level detection device also includes a short-range communication device and a long-range communication device.

[0027] The short-range communication device of the first liquid level detection device is used to send the current liquid level at the target location to the short-range communication device of the second liquid level detection device;

[0028] A long-distance communication device is used to send the current liquid level of all target locations to the central control equipment.

[0029] In the embodiments of this application, the control device of the first liquid level detection device further includes a power supply circuit, the second liquid level detection device further includes a solar power supply device, and the control device of the second liquid level detection device further includes a power supply circuit, a solar interface, and a charging interface.

[0030] The power supply circuit is used to power all the electromagnetic coils;

[0031] A solar power supply device used to supply power to a power circuit based on a solar interface;

[0032] The charging interface is used to supply power to the power circuit based on an external power source.

[0033] A third aspect of this application provides a liquid level detection method applied to the aforementioned liquid level detection system. The liquid level detection method includes:

[0034] The current liquid level at the target location is obtained using each liquid level detection device, where the target location is any location within the target area;

[0035] The current liquid level at each target location is received using the central control equipment, and the average current liquid level at all target locations is calculated to obtain the average liquid level of the target area.

[0036] This application provides a liquid level detection device, including an outer cavity, an inner cavity, a control device, and multiple electromagnetic coils. The inner cavity includes a liquid inlet on one side. Multiple electromagnetic coils are sequentially arranged between the outer cavity and the inner cavity. The liquid inlet allows liquid from a target location to be immersed into the inner cavity, causing a change in the current of at least one electromagnetic coil. The control device determines the current liquid level at the target location based on the current state of each electromagnetic coil. During the process of determining the liquid level through changes in the current of the electromagnetic coils, the liquid only enters the inner cavity and not the outer cavity. By preventing foreign matter in the liquid from affecting the obtained liquid level value, a more accurate liquid level can be obtained. Furthermore, by avoiding contact between the liquid and the electromagnetic coils, the durability of the device is further improved.

[0037] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0039] Figure 1 The schematic diagram illustrates the structure of a liquid level detection device according to an embodiment of this application;

[0040] Figure 2 The schematic diagram illustrates a structural schematic of a liquid level detection system according to an embodiment of this application;

[0041] Figure 3 This illustration schematically shows a structural diagram of a second liquid level detection device according to an embodiment of this application;

[0042] Figure 4 This illustration schematically shows a structural diagram of a control device for a first liquid level detection device according to an embodiment of this application;

[0043] Figure 5 This illustration schematically shows a structural diagram of a control device for a second liquid level detection device according to an embodiment of this application;

[0044] Figure 6 This illustration schematically shows a structural diagram of a control device for another second liquid level detection device according to an embodiment of this application;

[0045] Figure 7 The schematic diagram illustrates a flow chart of a liquid level detection method according to an embodiment of this application.

[0046] Explanation of reference numerals in the attached figures

[0047] 100-Liquid level detection equipment, 200-Liquid level detection system; 1001-First liquid level detection equipment, 1002-Second liquid level detection equipment; 110-Outer cavity, 120-Inner cavity, 130-Control device, 140-Electromagnetic coil, 150-Shielding shell, 160-Removable base, 210-Main control equipment; 121-Liquid inlet, 131-Control circuit, 132-Hall electromagnetic switch, 133-Communication circuit, 134-Power supply circuit, 135-Solar power supply device, 136-Solar interface, 137-Charging interface; 1331-Short-range communication device, 1332-Long-range communication device. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0049] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with the relevant provisions of national laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0050] It should be noted that if the embodiments of this application involve directional indicators (such as the top), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0052] Example 1

[0053] Figure 1 A schematic diagram of a liquid level detection device according to an embodiment of this application is shown. Figure 1 The embodiment of this application provides a liquid level detection device 100, which includes an outer cavity 110, an inner cavity 120, a control device 130 and a plurality of electromagnetic coils 140. The inner cavity 120 includes a liquid inlet 121 disposed on one side.

[0054] Multiple electromagnetic coils 140 are sequentially arranged between the outer cavity 110 and the inner cavity 120;

[0055] The liquid inlet 121 is used to allow liquid from the target location to be immersed into the inner cavity 120 so as to change the current of at least one electromagnetic coil 140.

[0056] The control device 130 is used to determine the current liquid level at the target location based on the current state of each electromagnetic coil 140.

[0057] The liquid level detection device 100 in this embodiment is a liquid level gauge based on the principle of electromagnetic ranging. Specifically, the liquid level detection device 100 includes an outer cavity 110, an inner cavity 120, a control device 130, and multiple electromagnetic coils 140. The inner cavity 120 includes a liquid inlet 121 disposed on one side. The structural shapes of the outer cavity 110 and the inner cavity 120 are set according to actual needs and are not limited here. As shown in the figure, for ease of understanding, in the embodiment of this application, both the outer cavity 110 and the inner cavity 120 are non-metallic thin hollow cylindrical shells. The outer cavity 110 and the inner cavity 120 together form the electromagnetic coil 140 cavity, and the outer cavity 110 and the inner cavity 120 are sealed with a cover plate. In this embodiment, the inner cavity 120 is provided with a liquid inlet 121 on one side along the negative y-axis.

[0058] Multiple electromagnetic coils 140 are sequentially disposed between the outer cavity 110 and the inner cavity 120. The width of the electromagnetic coils 140 is set according to actual needs and is not limited here. For ease of understanding, in this embodiment, the width of the electromagnetic coils 140 is 1 cm. In this embodiment, the liquid inlet 121 is located at the bottom of the inner cavity 120. When the liquid level detection device 100 is set at the target location, liquid is immersed from the bottom of the inner cavity 120. As the liquid level in the inner cavity 120 changes continuously, according to the principle of electromagnetic induction, the magnetic flux of the battery coil will change, thereby causing the current of at least one electromagnetic coil 140 to change. The target location is set according to actual needs and is not limited here.

[0059] The control device 130 is connected to the outer cavity 110 and the inner cavity 120 to acquire the current state of each electromagnetic coil 140. Based on the current state feedback from each electromagnetic coil 140, the control device 130 determines the current liquid level at the target location. During the process of determining the liquid level by the current changes of the electromagnetic coils 140, the liquid only enters the inner cavity 120 and not the outer cavity 110. By preventing foreign matter in the liquid from affecting the acquired liquid level value, a more accurate liquid level can be obtained. Furthermore, by avoiding contact between the liquid and the electromagnetic coils 140, the durability of the equipment is further improved.

[0060] In the embodiments of this application, the control device 130 includes a control circuit 131 and a Hall electromagnetic switch 132;

[0061] Hall effect electromagnetic switch 132 is used to respond to user operations and control the on / off state of control circuit 131;

[0062] The control circuit 131 is used to acquire the current state of each electromagnetic coil 140 and determine the current liquid level at the target location based on the current state of each electromagnetic coil 140.

[0063] The control device 130 includes a control circuit 131 and a Hall electromagnetic switch 132. The control circuit 131 can actively acquire the current state of each electromagnetic coil 140 and determine the current liquid level at the target location based on the current state of each electromagnetic coil 140.

[0064] The Hall effect electromagnetic switch 132, used in response to user operations, controls the on / off state of the control circuit 131. The Hall effect electromagnetic switch 132 consists of a Hall effect electromagnetic element and can control the on / off state of the circuit 131 based on electromagnetic changes. Specifically, the Hall effect electromagnetic switch 132 responds to user operations such as contacting or moving away from the magnetic device, controlling the opening or closing of the control circuit 131 of the liquid level detection device 100. By controlling the opening or closing of the liquid level detection device 100 using the Hall effect electromagnetic switch 132, the number of openings in the liquid level detection device 100 is reduced, further improving the waterproofness and durability of the liquid level detection device 100 and reducing the risk of damage to the components in the liquid level detection device 100.

[0065] In the embodiments of this application, the control circuit 131 is used to acquire the current state of each electromagnetic coil 140 and determine the current liquid level at the target location based on the current state of each electromagnetic coil 140, including:

[0066] The control circuit 131 is used to acquire the current state of each electromagnetic coil 140 and determine whether the current state of each electromagnetic coil 140 has changed.

[0067] The electromagnetic coil 140 whose current state changes is identified as the target electromagnetic coil 140;

[0068] The current liquid level at the target location is determined based on the height corresponding to the target electromagnetic coil 140.

[0069] As shown in the figure, multiple electromagnetic coils 140 are evenly arranged along the y-axis between the outer cavity 110 and the inner cavity 120, so that each electromagnetic coil 140 corresponds to a height. When the liquid rises to a certain level, according to the principle of electromagnetic induction, the current state of the electromagnetic coil 140 corresponding to the liquid level will switch from no change to a change in current. The control circuit 131 is used to acquire the current state of each electromagnetic coil 140 and determine whether the current state of each electromagnetic coil 140 is a change in current. The electromagnetic coil 140 with a change in current state is identified as the target electromagnetic coil 140. Since the liquid level rises to the height corresponding to the target electromagnetic coil 140, the current of the target electromagnetic coil 140 changes. Based on the height corresponding to the target electromagnetic coil 140, the current level at the target location is determined.

[0070] In the embodiments of this application, the liquid level detection device 100 further includes a shielding shell 150, and the outer cavity 110 and the inner cavity 120 are both disposed inside the shielding shell 150;

[0071] The shielding housing 150 is used to shield the external electromagnetic signals of the liquid level detection device 100.

[0072] The liquid level detection device 100 also includes a shielding housing 150. The outer cavity 110 and the inner cavity 120 are both located inside the shielding housing 150, meaning the shielding housing 150 encloses the outer cavity 110 and the inner cavity 120. The shielding housing 150 shields the liquid level detection device 100 from external electromagnetic signals, protects the electromagnetic coil 140 from external electromagnetic interference, and increases the circuit stability of the liquid level detection device 100.

[0073] In the embodiments of this application, the liquid level detection device 100 further includes a detachable base 160, and the outer cavity 110 and the inner cavity 120 are both disposed on the detachable base 160.

[0074] The detachable base 160 is used to fix the liquid level detection device 100 to the target location.

[0075] In the embodiments of this application, the outer cavity 110, the inner cavity 120, and the shielding shell 150 are all disposed at the upper end of the base. The detachable base 160 also includes a threaded structure for connecting with the outer cavity 110, the inner cavity 120, and the shielding shell 150 via the threaded structure. In actual liquid level detection scenarios, the surface of the target location is usually a soil surface. In the embodiments of this application, the detachable base 160 also includes a metal rod with four threads for fixing the liquid level detection device 100 to the target location via the metal rod.

[0076] This application provides a liquid level detection device 100, including an outer cavity 110, an inner cavity 120, a control device 130, and a plurality of electromagnetic coils 140. The inner cavity 120 includes a liquid inlet 121 disposed on one side. The plurality of electromagnetic coils 140 are sequentially disposed between the outer cavity 110 and the inner cavity 120. The liquid inlet 121 is used to allow liquid from a target location to be immersed into the inner cavity 120, thereby causing a change in the current of at least one electromagnetic coil 140. The control device 130 is used to determine the current liquid level at the target location based on the current state of each electromagnetic coil 140. During the process of determining the liquid level by the change in current of the electromagnetic coils 140, the liquid only immerses in the inner cavity 120 and does not immerse in the outer cavity 110. By avoiding the adhesion of foreign matter in the liquid and affecting the obtained liquid level value, a more accurate liquid level can be obtained. At the same time, by avoiding contact between the liquid and the electromagnetic coils 140, the durability of the device is further improved.

[0077] Example 2

[0078] Figure 2 A schematic diagram of a liquid level detection system according to an embodiment of this application is shown. Figure 1 The embodiment of this application shows a liquid level detection system 200, which includes a central control device 210 and at least two of the above-mentioned liquid level detection devices 100.

[0079] Each liquid level detection device 100 is used to obtain the current liquid level at a target location, where the target location is any location within the target area;

[0080] The central control device 210 is used to receive the current liquid level at each target location and calculate the average liquid level of all target locations to obtain the average liquid level of the target area.

[0081] The number of liquid level detection devices 100 is set according to actual needs. The number can be three, arranged using a central equilateral triangle measurement method, or five, arranged using a central five-point measurement method. Each liquid level detection device 100 is set at a target location to obtain the current liquid level at that location. The target location can be any location within the target area.

[0082] Each liquid level detection device 100 acquires the current liquid level at the target location. The central control device 210 receives the current liquid level from each target location and summarizes the liquid levels at all target locations. The central control device 210 calculates the average liquid level of all target locations to obtain the average liquid level of the target area. Since the target area for actual liquid level detection is usually a large area, using the average liquid level to reflect the liquid level of the target area can more realistically reflect the liquid level situation in the target area, thus obtaining a more accurate liquid level value for the target area. The target area is set according to actual needs and can be farmland, etc., without limitation.

[0083] In the embodiments of this application, the control device 130 of each liquid level detection device 100 includes a communication circuit 133;

[0084] The communication circuit 133 is used to send the current liquid level at the target location to the central control device 210, or to send the current liquid level at the target location to another liquid level detection device 100.

[0085] The liquid level detection device 100 includes a communication circuit 133 that can send the current liquid level at a target location to a central control device 210, enabling the central control device 210 to calculate the average of the current liquid levels at all target locations. Furthermore, the communication circuit 133 can also send the current liquid level at a target location to another liquid level detection device 100, thus aggregating the current liquid levels at all target locations into a single liquid level detection device 100.

[0086] In the embodiments of this application, at least two liquid level detection devices 100 include at least one first liquid level detection device 1001 and a second liquid level detection device 1002;

[0087] The communication circuit 133 of the first liquid level detection device 1001 includes a short-range communication device 1331, and the communication circuit 133 of the second liquid level detection device 1002 also includes a short-range communication device 1331 and a long-range communication device 1332.

[0088] The short-range communication device 1331 of the first liquid level detection device 1001 is used to send the current liquid level at the target location to the short-range communication device 1331 of the second liquid level detection device 1002.

[0089] The long-distance communication device 1332 is used to send the current liquid level of all target locations to the central control device 210.

[0090] The at least two liquid level detection devices 100 include at least one first liquid level detection device 1001 and one second liquid level detection device 1002. For ease of understanding, only three first liquid level detection devices 1001 are shown in the figure.

[0091] Figure 3 The schematic diagram illustrates the structure of a second liquid level detection device according to an embodiment of this application.

[0092] Generally, the lower the power consumption of a communication device, the shorter the signal transmission distance, and the higher the power consumption, the longer the signal transmission distance. This allows communication devices to be categorized into low-power short-range communication devices 1331 and high-power long-range communication devices 1332. In the embodiments of this application, the communication circuits 133 of all first liquid level detection devices 1001 and second liquid level detection devices 1002 include short-range communication devices 1331. The first liquid level detection device 1001 and... Figure 1 The liquid level detection device 100 in the figure has the same structure and is not shown in the figure.

[0093] Figure 4 The schematic diagram illustrates the structure of a control device 130 for a first liquid level detection device according to an embodiment of this application.

[0094] Figure 5 The schematic diagram illustrates the structure of a control device 130 for a second liquid level detection device according to an embodiment of this application.

[0095] The second liquid level detection device 1002 is an Internet of Things (IoT) device. The communication circuit 133 of the second liquid level detection device 1002 also includes a long-range communication device 1332, meaning the second liquid level detection device 1002 simultaneously includes both a long-range communication device 1332 and a short-range communication device 1331. The types of both the long-range communication device 1332 and the short-range communication device 1331 are determined according to actual needs. The long-range communication device 1332 can be a 4G (Fourth Generation Mobile Communication Technology) communication device, and this is not limited here.

[0096] For the first liquid level detection devices 1001 other than the second liquid level detection device 1002, the short-range communication device 1331 of each first liquid level detection device 1001 sends the current liquid level of the target location to the short-range communication device 1331 of the second liquid level detection device 1002, so as to aggregate the current liquid level of each target location to the second liquid level detection device 1002. The long-range communication device 1332 of the second liquid level detection device 1002 aggregates the current liquid level of all target locations and sends all aggregated current liquid levels to the central control device 210. By aggregating and sending the current liquid level, only one long-range communication device 1332 is needed, reducing the number of IoT cards, which not only reduces the power consumption of the liquid level detection system 200, but also reduces the setup cost of the liquid level detection system 200.

[0097] Figure 6The schematic diagram illustrates the structure of a control device 130 for another second liquid level detection device according to an embodiment of this application.

[0098] In the embodiments of this application, the control device 130 of the first liquid level detection device 1001 further includes a power supply circuit 134, and the control device 130 of the second liquid level detection device 1002 further includes a power supply circuit 134, a solar power supply device 135, a solar interface 136, and a charging interface 137.

[0099] The power supply circuit 134 is used to power all the electromagnetic coils 140;

[0100] A solar power supply device 135 is used to supply power to the power circuit 134 via a solar interface 136;

[0101] The charging interface 137 is used to supply power to the power circuit 134 based on an external power source.

[0102] In this embodiment, both the power supply circuit 134 and the communication circuit 133 are located in the control device 130. The first liquid level detection device 1001 and the second liquid level detection device 1002 both include the power supply circuit 134. The power supply circuit 134 is used to power all the electromagnetic coils 140 of the liquid level detection device 100. In addition, the power supply circuit 134 is also used to power the control circuit 131 and the communication circuit 133, which will not be described in detail here.

[0103] The second liquid level detection device 1002 also includes a solar power supply device 135, a solar interface 136, and a charging interface 137. For ease of understanding, in this embodiment, the solar power supply device 135 is located at the top of the liquid level detection device 100, that is, above the outer cavity 110 and inner cavity 120 along the y-axis. The solar power supply device 135 also includes a threaded interface for connection with the outer cavity 110 and inner cavity 120. Furthermore, the solar interface 136 and charging interface 137 may be equipped with waterproof covers to enhance the device's waterproofness. The solar interface 136 and charging interface 137 are configured according to actual needs and are not limited here. For ease of understanding, in this embodiment, the charging interface 137 is an aviation interface to increase the device's waterproofness.

[0104] Since the second liquid level detection device 1002 also includes a high-power long-range communication device 1332, in this embodiment, the second liquid level detection device 1002 is powered for a long time by a solar power supply device 135, and the power circuit 134 in the second liquid level detection device 1002 can use a rechargeable battery. The power circuit 134 in the first liquid level detection device 1001, other than the second liquid level detection device 1002, can use a replaceable battery to ensure the long-term reliable use of the first liquid level detection device 1001 even in the absence of other charging devices such as the solar power supply device 135. Typically, the power consumption of the short-range communication device 1331 is close to one-tenth of the power consumption of the long-range communication device 1332. Reducing the number of solar power devices can further reduce the setup cost of the liquid level detection system 200.

[0105] Example 3

[0106] Figure 7 A schematic flowchart of a liquid level detection method according to an embodiment of this application is shown. Figure 1 As shown, this application provides a liquid level detection method applied to the above-mentioned liquid level detection system. The liquid level detection method includes:

[0107] S310: Each liquid level detection device is used to obtain the current liquid level at the target location, where the target location is any location in the target area.

[0108] Typically, the target area is a large area such as farmland. In this embodiment, the number of liquid level detection devices is determined based on the size of the target area. Specifically, when the target area is larger than 10 mu (approximately 1.65 acres), 3 liquid level detection devices are used, and 3 devices are set up in the target area using a central equilateral triangle measurement method. When the target area is larger than 10 mu (approximately 1.65 acres), 5 liquid level detection devices are used, and 5 devices are set up at the vertices of the four sides of the square and at the center point of the square, respectively.

[0109] Each liquid level detection device is set up at a target location to obtain the current liquid level at the target location, where the target location is any location within the target area.

[0110] S320 uses the central control equipment to receive the current liquid level at each target location and calculates the average liquid level of all target locations to obtain the average liquid level of the target area.

[0111] Each liquid level detection device acquires the current liquid level at the target location. The central control device receives the current liquid level from each target location and aggregates the liquid levels at all target locations. The central control device calculates the average liquid level of all target locations to obtain the average liquid level of the target area. Since the target area where liquid level detection is actually needed is usually a large area, using the average liquid level to reflect the liquid level of the target area can more realistically reflect the liquid level situation in the target area, thus obtaining a more accurate liquid level value for the target area.

[0112] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0113] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0114] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0115] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A liquid level detection device, characterized in that, The liquid level detection device includes an outer cavity, an inner cavity, a control device, and multiple electromagnetic coils. The inner cavity includes a liquid inlet located on one side. The plurality of electromagnetic coils are sequentially disposed between the outer cavity and the inner cavity; The liquid inlet is used to allow liquid from the target location to be immersed into the inner cavity, so as to change the current of at least one of the electromagnetic coils; The control device is used to determine the current liquid level at the target location based on the current state of each of the electromagnetic coils.

2. The liquid level detection device according to claim 1, characterized in that, The control device includes a control circuit and a Hall effect electromagnetic switch; The Hall effect electromagnetic switch is used to respond to user operations and control the on / off state of the control circuit. The control circuit is used to acquire the current state of each of the electromagnetic coils and determine the current liquid level at the target location based on the current state of each of the electromagnetic coils.

3. The liquid level detection device according to claim 2, characterized in that, The control circuit is used to acquire the current state of each of the electromagnetic coils and determine the current liquid level at the target location based on the current state of each of the electromagnetic coils, including: The control circuit is used to acquire the current state of each electromagnetic coil and determine whether the current state of each electromagnetic coil has changed. The electromagnetic coil whose current state changes is identified as the target electromagnetic coil. The current liquid level at the target location is determined based on the height corresponding to the target electromagnetic coil.

4. The liquid level detection device according to claim 1, characterized in that, The liquid level detection device also includes a shielding shell, and both the outer cavity and the inner cavity are disposed inside the shielding shell; The shielding shell is used to shield the external electromagnetic signals of the liquid level detection device.

5. The liquid level detection device according to claim 1, characterized in that, The liquid level detection device also includes a detachable base, and both the outer cavity and the inner cavity are disposed on the detachable base; The detachable base is used to fix the liquid level detection device to the target location.

6. A liquid level detection system, characterized in that, The liquid level detection system includes a central control device and at least two liquid level detection devices according to any one of claims 1 to 5; Each of the liquid level detection devices is used to acquire the current liquid level at a target location, wherein the target location is any location within the target area; The central control device is used to receive the current liquid level of each of the target locations and calculate the average liquid level of all the target locations to obtain the average liquid level of the target area.

7. The liquid level detection system according to claim 6, characterized in that, The control device for each of the liquid level detection devices includes a communication circuit. The communication circuit is used to send the current liquid level at the target location to the central control device, or to send the current liquid level at the target location to another liquid level detection device.

8. The liquid level detection system according to claim 7, characterized in that, The at least two liquid level detection devices include at least one first liquid level detection device and one second liquid level detection device; The communication circuit of the first liquid level detection device includes a short-range communication device, and the communication circuit of the second liquid level detection device further includes the short-range communication device and a long-range communication device; The short-range communication device of the first liquid level detection device is used to send the current liquid level at the target location to the short-range communication device of the second liquid level detection device; The long-distance communication device is used to send the current liquid level of all the target locations to the central control device.

9. The liquid level detection system according to claim 8, characterized in that, The control device of the first liquid level detection device further includes a power supply circuit, and the second liquid level detection device further includes a solar power supply device. The control device of the second liquid level detection device further includes the power supply circuit, a solar interface, and a charging interface. The power supply circuit is used to power all of the electromagnetic coils; The solar power supply device is used to supply power to the power circuit based on the solar interface; The charging interface is used to supply power to the power circuit based on an external power source.

10. A liquid level detection method, characterized in that, The liquid level detection method, applied to the liquid level detection system according to any one of claims 6 to 9, comprises: The current liquid level at the target location is obtained using each of the liquid level detection devices, wherein the target location is any location within the target area; The central control device receives the current liquid level at each target location and calculates the average liquid level of all target locations to obtain the average liquid level of the target area.

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