Water level detection device and water storage system

Abstract

The utility model discloses a water level detection device and a water storage system, and relates to the field of water level detection, a working probe and a reference probe are arranged in a water storage container and are both connected with a sampling module, and the sampling module realizes water level detection based on a resistance value of a conduction loop formed by the probes and water; meanwhile, the working probe and / or the reference probe are / is further provided with an insulation sleeve, insulation is formed between the probe part corresponding to the sleeving position of the insulation sleeve and water, when the water level changes in the position range corresponding to the insulation sleeve, the change of the resistance value of the conduction loop is very small, and at the moment, the sampling module can achieve flow velocity detection by combining the length of the insulation sleeve. According to the water level detection device, the insulating sleeve is additionally arranged on the probe, so that the water level detection device can realize flow velocity detection while performing water level detection, the risk of water leakage during water pipe switching is avoided, the water level detection device can be directly sleeved and mounted on the probe, a reserved space is not needed, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of water level detection, and in particular to a water level detection device and a water storage system. Background Technology

[0002] In industrial production and daily life, the normal operation of many equipment and systems depends on the accurate monitoring and control of water levels. Besides monitoring changes in the water level itself, detecting fluid velocity is also crucial for understanding the flow and changes in water bodies, helping to control and adjust water levels. Therefore, how to detect flow velocity simultaneously with water level detection has become an urgent technical problem to be solved. Taking hot water storage tanks as an example, currently, water level is mainly detected by installing a level probe in the tank, while a flow meter is added at the front end (inlet) and the rear end (outlet) to detect the inlet and outlet flow velocities of the tank, respectively. However, installing flow meters in the water circuit increases the risk of leakage at pipe connections, and the installation of flow meters requires a certain amount of reserved space. For some older models of hot water storage tanks, space constraints may prevent the installation of flow meters. Utility Model Content

[0003] The purpose of this invention is to provide a water level detection device and a water storage system that can detect the liquid flow rate while detecting the water level.

[0004] To solve the above-mentioned technical problems, this utility model provides a water level detection device for use in water storage containers. The water level detection device includes:

[0005] Working probe;

[0006] The sampling module has a first end connected to one end of the working probe, and is used to output power voltage to the working probe;

[0007] A reference probe, one end of which is connected to the second end of the sampling module, is used to form a conductive loop with the working probe based on the liquid in the water storage container, so that the sampling module can detect the water level according to the resistance value of the conductive loop.

[0008] An insulating sleeve, fitted onto the working probe and / or the reference probe, is used to ensure that when the water level in the water storage container changes within the range corresponding to the insulating sleeve, the rate of change of the resistance value of the conductive circuit does not exceed a preset threshold, so that the sampling module can detect the flow rate based on the length of the insulating sleeve.

[0009] Optionally, the working probe includes a low-level probe, a medium-level probe, and a high-level probe, wherein the probe length of the low-level probe is greater than the probe length of the medium-level probe, the probe length of the medium-level probe is greater than the probe length of the high-level probe, and the probe length of the low-level probe is equal to the probe length of the reference probe.

[0010] One end of the low liquid level probe is connected to the first sampling end of the sampling module, one end of the medium liquid level probe is connected to the second sampling end of the sampling module, and one end of the high liquid level probe is connected to the third sampling end of the sampling module.

[0011] Optionally, the low liquid level probe, the medium liquid level probe, the high liquid level probe, and the reference probe are all fitted with a plurality of insulating sleeves, and the insulating sleeves on each probe are fitted at the same position.

[0012] Optional, also includes:

[0013] A temperature probe, one end of which is connected to the third end of the sampling module, is used to detect the temperature in the water storage container so that the sampling module can perform water level detection based on the temperature and the resistance value of the conductive circuit.

[0014] Optionally, the sampling module includes:

[0015] Terminal blocks are used to connect probe leads;

[0016] The power module has a first output terminal connected to one end of the reference probe via the terminal block and the probe lead, for outputting power supply voltage.

[0017] The first current limiting module has its first end connected to one end of the working probe via the terminal block and the probe lead, and is also connected to the second output terminal of the power module.

[0018] The ADC module, with its input terminal connected to the second terminal of the first current limiting module, is used to sample the resistance value at one end of the working probe and convert the resistance value into a digital signal.

[0019] Optionally, the sampling module further includes:

[0020] The second current limiting module has a first end connected to the first output end of the power module, and a second end connected to one end of the reference probe through the terminal block and the probe lead.

[0021] And / or,

[0022] The third current limiting module has its first end connected to the second output end of the power module and its second end connected to the first end of the first current limiting module.

[0023] Optionally, the power module includes:

[0024] The first power supply submodule corresponding to the working probe has its input end connected to the power supply, and its output end connected to one end of the working probe through the terminal block and the probe lead. It is used to output a high level when performing water level detection and flow rate detection, and to output a low level when performing ion balance.

[0025] The second power supply submodule corresponding to the reference probe has its input end connected to the power supply, and its output end connected to one end of the reference probe through the terminal block and the probe lead. It is used to output a low level when performing water level detection and flow rate detection, and to output a high level when performing ion balance.

[0026] Optionally, the first power supply submodule includes:

[0027] The 555 timer has its power supply terminal connected to the power supply, its ground terminal grounded, and its output terminal connected to one end of the working probe via the terminal block and the probe lead.

[0028] The first resistor has its first end connected to the power supply terminal of the 555 timer.

[0029] First diode;

[0030] The cathode of the second diode is connected to the second terminal of the first resistor, the anode of the first diode, and the discharge terminal of the 555 timer, respectively.

[0031] The second resistor has its first end connected to the cathode of the first diode and its second end connected to the anode of the second diode.

[0032] The first capacitor has its first end connected to the tap of the second resistor, the trigger terminal of the 555 timer, and the threshold terminal of the 555 timer, respectively, and its second end grounded.

[0033] Optionally, the first power supply submodule further includes:

[0034] The second capacitor has its first end connected to the control voltage terminal of the 555 timer, and its second end grounded.

[0035] To solve the above-mentioned technical problems, this utility model also provides a water storage system, including a water storage container, a probe mounting base, and a water level detection device as described above. The working probe and the reference probe in the water level detection device are both mounted on the probe mounting base, which is located on the top of the water storage container to fix the working probe and the reference probe in the water storage container.

[0036] This utility model discloses a water level detection device, including a working probe, a reference probe, a sampling module, and an insulating sleeve fitted onto the working probe and / or the reference probe. The working probe and the reference probe are disposed in a water storage container and are both connected to the sampling module. The sampling module detects the water level based on the resistance value of the conductive loop formed between the probe and the water. Simultaneously, an insulating sleeve is also provided on the working probe and / or the reference probe. The probe portion corresponding to the sleeve's placement position forms insulation with the water. When the water level changes within the range corresponding to the insulating sleeve's position, the change in the resistance value of the conductive loop is very small. At this time, the sampling module, combined with the length of the insulating sleeve, can detect the flow rate. By adding an insulating sleeve to the probe, the water level detection device can simultaneously detect the water level and the flow rate, avoiding the risk of leakage at water pipe connections. It can be directly installed on the probe without requiring pre-reserved space, and has a wide range of applications.

[0037] This utility model also discloses a water storage system, which has the same beneficial effects as the water level detection device described above. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the structure of a water level detection device provided by this utility model;

[0040] Figure 2 A schematic diagram of the structure of a water storage system provided by this utility model;

[0041] Figure 3 A schematic diagram of the structure of a sampling module provided by this utility model;

[0042] Figure 4 This is a schematic diagram of the structure of a power module provided by this utility model. Detailed Implementation

[0043] The core of this utility model is to provide a water level detection device and a water storage system. By adding an insulating sleeve to the probe, the water level detection device can detect the flow rate at the same time as the water level, avoiding the risk of water leakage at the water pipe connection. It can be directly installed on the probe without reserving space, and has a wide range of applications.

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a water level detection device provided by this utility model; please refer to... Figure 2 , Figure 2 This utility model provides a structural schematic diagram of a water storage system; to solve the above-mentioned technical problems, this utility model provides a water level detection device, applied to a water storage container T, the water level detection device comprising:

[0046] Working probe PRB1;

[0047] The sampling module ADC has its first end connected to one end of the working probe PRB1, and is used to output the power supply voltage to the working probe PRB1.

[0048] The reference probe PRB0 is connected at one end to the second end of the sampling module ADC. It is used to form a conducting loop with the working probe PRB1 based on the liquid in the water storage container T, so that the sampling module ADC can detect the water level according to the resistance value of the conducting loop.

[0049] An insulating sleeve INS is fitted onto the working probe PRB1 and / or the reference probe PRB0. It is used to ensure that when the water level in the water storage container T changes within the range corresponding to the insulating sleeve INS, the rate of change of the resistance value of the conductive circuit does not exceed a preset threshold, so that the sampling module ADC can detect the flow rate based on the length of the insulating sleeve INS.

[0050] Understandably, to detect the water level in the water storage container T, a probe module is installed in the water level detection device. This probe module includes a working probe PRB1 and a reference probe PRB0. When water level detection is required, the sampling module ADC powers the working probe PRB1. Both the working probe PRB1 and the reference probe PRB0 are located inside the water storage container T. When there is a certain level of water in the water storage container T, and the water is in contact with both the working probe PRB1 and the reference probe PRB0, the power supply voltage output by the sampling module ADC will sequentially pass through the working probe PRB1, the water in contact with the probe, and the reference probe PRB0. PRB0 forms a conducting loop. At this time, the sampling module ADC can detect the corresponding electrical signal at one end of the working probe PRB1 and / or one end of the reference probe PRB0. When the water level in the water storage container T changes, the area of ​​water in contact with the working probe PRB1 and the reference probe PRB0 will also change, thereby causing a change in the sampling electrical signal. This allows for the detection of the water level in the water storage container T. The electrical signal includes voltage, resistance, etc. In this embodiment, the resistance value is mainly used as the sampling object for water level detection. When the water level rises, the contact area between the probe and the water increases, which is equivalent to the cross-sectional area of ​​the entire conductor of the conducting loop increasing, and the resistance of the conducting loop decreasing.

[0051] Furthermore, in addition to achieving water level detection, to achieve more accurate water level monitoring and control, and to gain a more comprehensive understanding of water flow and changes, this application also includes an insulating sleeve INS fitted onto the working probe PRB1 and / or the reference probe PRB0. The insulating sleeve INS is a hollow container or cover with a specific shape and size. The insulating sleeve INS fitted onto the working probe PRB1 and / or the reference probe PRB0 can enclose part of the probe within it, forming an insulating space. This ensures that the enclosed probe portion remains insulated from the water body. Therefore, when the water level changes within the range corresponding to the water level position of the probe portion enclosed by the insulating sleeve INS, sampling... The electrical signal (resistance value) sampled by the module ADC will not change with the water level, or the change will be very small. The sampling module ADC will continuously sample the electrical signal at one end of the working probe PRB1 and one end of the reference probe PRB0 in real time. When the rate of change of the resistance value of the conducting loop is not greater than the preset threshold, that is, when the change of the sampled electrical signal is relatively small, it can be determined that the water level is changing within the range corresponding to the position of the insulating sleeve INS. When the change of the sampled electrical signal returns to a relatively large value, that is, when the rate of change of the resistance value of the conducting loop is greater than the preset threshold, it can be determined that the change of the water level has exceeded the range corresponding to the position of the insulating sleeve INS. Therefore, by determining the rate of change of the sampling electrical signal (resistance value of the conducting circuit) in real time, the initial moment when the water level reaches the position range corresponding to the insulating sleeve INS and the ending moment when the water level exceeds the position range corresponding to the insulating sleeve INS can be determined. The difference between the ending moment and the initial moment is the duration of the water level change within the position range corresponding to the insulating sleeve INS. Then, based on the setting length of the insulating sleeve INS and the cross-sectional area of ​​the water storage container T within the position range corresponding to the insulating sleeve INS, the water volume corresponding to the entire change process from reaching the insulating sleeve INS to exceeding the insulating sleeve INS can be determined. Then, combined with the formula of water volume / change duration, the flow rate of the water during this change process can be calculated, thereby realizing flow rate detection.

[0052] It's easy to understand that the sampling electrical signal corresponding to the conductive loop formed by the probe module in the water level detection device changes with the water level. In particular, the resistance value of the conductive loop can be accurately calculated based on the TDS (Total Dissolved Solids) value of different water qualities, the contact area between the water and the probe, and the probe length. After ADC (Analog-to-Digital Converter) acquisition by the sampling module, the change in the ADC value corresponding to the resistance value can effectively reflect the change in water level in the storage container T, fluctuating within a certain range. However, when an insulating sleeve INS is installed on the probe, since the INS itself is non-conductive, the corresponding ADC value will no longer change significantly when water passes through it. At this point, the flow rate of water replenishment and / or outflow from the storage container T can be calculated by using the length of the insulating sleeve INS, the corresponding volume of the storage container T, and the time difference between the change in the ADC value and the change in the ADC value. By adding an insulating sleeve (INS) to the water level detection probe, the flow rate of water replenishment and discharge from the hot tank is calculated by using the ratio of the time difference between the length of the insulating sleeve (INS) corresponding to the volume of the hot tank and whether the ADC value changes significantly. This directly reuses the probe used for water level detection to achieve flow rate detection. Only the insulating sleeve (INS) needs to be set up, without the need to add any other equipment.

[0053] It should be noted that the detection object of the water level detection device provided in this application is not limited to water bodies, but can also be applied to other liquid storage containers for liquid level detection and liquid flow rate detection. This embodiment mainly uses water bodies as an example for illustration. This application does not impose special limitations on the specific type and implementation method of the working probe PRB1 and reference probe PRB0, and is not limited to using a resistive liquid level probe to detect the resistance value of the conductive circuit; the specific shape and length can be selected and set according to the actual application scenario, and can be implemented in a cylindrical form, etc.; this application does not impose special limitations on the setting method and specific setting position of the insulating sleeve INS, the shape of the insulating sleeve INS can be set according to the specific shape of the probe, and the material can be an insulating material. For example, when the probe is implemented as a cylinder, the insulating sleeve INS can be implemented as a silicone sleeve; the specific number and arrangement of the insulating sleeve INS can be adjusted according to actual application requirements; when the probe length is fixed, when the required flow rate detection accuracy needs to be improved, the length of the insulating sleeve INS can be shortened to increase the number of insulating sleeve INS, thereby achieving more flow rate detections and improving the accuracy of flow rate detection. This application does not impose any special restrictions on the specific value and implementation method of the preset threshold. The threshold can be selected and set according to the actual application scenario, or its specific value can be determined through prior experimental testing. Similarly, this application does not impose any special restrictions on the specific type and implementation method of the sampling module ADC, nor on the specific type and implementation method of the water storage container T. It can be implemented using methods such as a hot water tank.

[0054] As a specific embodiment, such as Figure 2As shown, the hot tank is equipped with three working probes (PRB1): a low-level probe (PRB13), a medium-level probe (PRB12), and a high-level probe (PRB11), as well as a reference probe (PRB0). Taking the low-level probe (PRB13) as an example, the detection of flow rate during the water level rise process and the implementation steps are explained. Several insulating sleeves (INS) on the low-level probe (PRB13) are numbered from bottom to top as INS1 to INS8. Taking a TDS of 100 ppm for the water stored in the hot tank as an example, the water level rises continuously over time. Assuming that the ADC detection value after the water level reaches insulating sleeve (INS1) on the low-level probe (PRB13) remains between 3912 and 4000, and the length of each insulating sleeve (INS) on the probe is 20 cm, the calculated water capacity corresponding to each insulating sleeve (INS) is 500 mL, meaning that the water volume required to rise from the bottom to the top of a certain insulating sleeve (INS) is 500 mL. After ADC detection by the sampling module, the water reached the lower end of the No. 1 insulating sleeve INS on the low liquid level probe PRB13 at 100ms and the upper end at 200ms. Therefore, the hot tank replenishment flow rate is 500mL / (200-100)ms. The length of the insulating sleeve INS can be adjusted according to application requirements. Since the length of the insulating sleeve INS is controllable, and the ADC value corresponding to the water level passing through the insulating sleeve INS will vary within a certain range, the corresponding hot tank replenishment and / or outlet flow rates can be calculated.

[0055] This application addresses the limitation of current water level detection products, which primarily use probes for water level detection but cannot detect liquid flow rate. Therefore, it provides a water level detection device that leverages the existing probe-based water level detection product structure by adding an insulating sleeve (INS) to the probe, thus eliminating the need for a flow meter and reducing the overall cost. When older products only use probes for water level detection, this device allows for upgrades without altering the water circuit or adding other detection components. It enables older products to achieve the new function of flow rate detection without changing the original structure of the water storage system. Furthermore, it is suitable for both maintenance and upgrades of older products and cost reduction and efficiency improvement of new products.

[0056] Based on the above embodiments:

[0057] As an optional embodiment, the working probe PRB1 includes a low-level probe PRB13, a medium-level probe PRB12, and a high-level probe PRB11. The probe length of the low-level probe PRB13 is greater than the probe length of the medium-level probe PRB12, and the probe length of the medium-level probe PRB12 is greater than the probe length of the high-level probe PRB11. The probe length of the low-level probe PRB13 is equal to the probe length of the reference probe PRB0.

[0058] One end of the low liquid level probe PRB13 is connected to the first sampling end of the sampling module ADC, one end of the medium liquid level probe PRB12 is connected to the second sampling end of the sampling module ADC, and one end of the high liquid level probe PRB11 is connected to the third sampling end of the sampling module ADC.

[0059] It's easy to understand that, to achieve more comprehensive liquid level detection, several probes of different lengths can be used when setting up the working probes PRB1 to identify and distinguish different water levels. The different lengths of probes working together can also achieve more accurate liquid level detection. A specific embodiment uses three working probes PRB1: a low-level probe PRB13, a medium-level probe PRB12, and a high-level probe PRB11. The low-level probe PRB13 is the longest, extending deep into the water storage container T, allowing it to contact the container even when the water level is low. The high-level probe PRB11 is the shortest, only contacting the container when the water level is high. The reference probe PRB0 serves as the baseline for all working probes PRB1 and needs to form a conductive loop with each working probe PRB1. Therefore, its length must be no less than the length of each working probe PRB1. Generally, it can be consistent with the length of the low-level probe PRB13, or slightly larger than the length of the low-level probe PRB13. The sampling module ADC needs to independently acquire the electrical signals corresponding to each working probe PRB1. Therefore, its first end includes several sampling terminals connected one-to-one with several working probes PRB1. When there is an electrical signal output at the first sampling terminal, it can be determined that there is water in the water storage container T. When there is an electrical signal output at the second sampling terminal, it can be determined that the water level in the water storage container T has reached a certain level. When there is an electrical signal output at the third sampling terminal, it can be determined that the water level in the water storage container T is very high. The water level in the water storage container T can be roughly determined by whether there is a corresponding electrical signal output at different sampling terminals. Simultaneously, once the water level contacts the middle level probe PRB12, water level detection can be performed based on the electrical signals corresponding to both the middle level probe PRB12 and the high level probe PRB11. The detection results of the two working probes PRB11 corroborate each other, improving the accuracy and reliability of water level detection. This application does not specifically limit the specific types and implementation methods of the low level probe PRB13, middle level probe PRB12, and high level probe PRB11.

[0060] Specifically, by setting multiple working probes PRB1, different water levels in the water storage container T can be effectively distinguished. Combined with the alarm module and alarm strategy settings, different water levels can be differentiated and identified, providing a faster and more efficient water level identification operation. This provides an overall trend for water level detection and helps to achieve a more reliable and accurate water level detection process.

[0061] As an optional embodiment, several insulating sleeves INS are fitted on the low liquid level probe PRB13, the medium liquid level probe PRB12, the high liquid level probe PRB11 and the reference probe PRB0, and the insulating sleeves INS on each probe are fitted in the same position.

[0062] Understandably, to ensure the accuracy and reliability of flow velocity detection, a preferred embodiment for setting the insulating sleeves (INS) is that the insulating sleeves are set at the same position on each probe. The same position means that each probe has a number of insulating sleeves that correspond to each other in a one-to-one manner. Since the lengths of different probes are different, the insulating sleeves on the medium level probe PRB12 and the high level probe PRB11 will only correspond to a portion of the insulating sleeves on the low level probe PRB13. The number and position of the insulating sleeves set on the low level probe PRB13 and the reference probe PRB0 are completely consistent. When the water level changes within the range of the position corresponding to the insulating sleeve INS, the corresponding working probe PRB1 and the reference probe PRB0 are not conductive, so that the electrical signal detected by the sampling module ADC remains basically unchanged. In practice, the ground level of the water storage container T can be used as a reference to determine several reference heights. These reference heights are then used as the positions for setting the lower end of the insulating sleeve INS. The insulating sleeve INS is then installed on each probe. For example, at height h, if the low-level probe PRB13, medium-level probe PRB12, high-level probe PRB11, and reference probe PRB0 are all present, then an insulating sleeve INS with its lower end at height h is installed on each of these probes. Figure 2 As shown, the low-level probe PRB13 and the reference probe PRB0 have eight insulating sleeves (INS) of identical height. Due to its length limitation, the medium-level probe PRB12 has four insulating sleeves (INS) corresponding to the positions of insulating sleeves INS 5 through 8. The high-level probe PRB11, also due to its length limitation, has only one insulating sleeve (INS). To facilitate flow velocity detection, the spacing between the insulating sleeves (INS) on the same probe can be kept consistent.

[0063] Specifically, by adjusting the setting position to ensure that the electrical signal detected by the sampling module ADC remains unchanged when the water level changes within the position range corresponding to the insulating sleeve INS, the sampling module ADC can promptly determine the initial moment when the water level reaches the position range corresponding to the insulating sleeve INS without changing the electrical signal, thereby improving the accuracy of flow velocity detection.

[0064] As an optional embodiment, it also includes:

[0065] Temperature probe 23 is connected at one end to the third end of the sampling module ADC to detect the temperature in the water storage container T, so that the sampling module ADC can perform water level detection based on the temperature and the resistance value of the conduction circuit.

[0066] It is easy to understand that, considering the effect of temperature on the conductivity of water, an extended temperature probe 23 can be placed in the water storage container T to cooperate with the sampling module ADC to detect the temperature in the water storage container T in real time. This adds the influence of temperature on the sampled electrical signal during the water level detection process, determines the impact of different water temperatures on the ADC value, and achieves more accurate water level detection. This application does not specifically limit the specific type and implementation method of the temperature probe 23; it can be implemented using an NTC (Negative Temperature Coefficient) probe or other methods.

[0067] Specifically, by adding a temperature sensor to the water storage container T, the influence of water temperature on the sampling electrical signal is determined, thereby avoiding water level detection errors caused by temperature. This, combined with the sampling module ADC, enables more accurate water level detection. It is simple, effective, and easy to implement, requiring no adjustments to the structure of the water storage container T.

[0068] Please refer to Figure 3 , Figure 3 A schematic diagram of a sampling module provided by this utility model; as an optional embodiment, the sampling module ADC includes:

[0069] Terminal CN1 is used to connect probe lead 21;

[0070] The power module has its first output terminal connected to one end of the reference probe PRB0 via terminal CN1 and probe lead 21, for outputting power supply voltage.

[0071] The first current limiting module has its first end connected to one end of the working probe PRB1 via the terminal CN1 and probe lead 21, and is also connected to the second output end of the power module.

[0072] The ADC module, with its input terminal connected to the second terminal of the first current limiting module, is used to sample the resistance value at one end of the working probe PRB1 and convert the resistance value into a digital signal.

[0073] It is understood that the sampling module ADC can specifically use ADC sampling to sample the electrical signal corresponding to the probe. Simultaneously, the sampling module ADC includes a terminal CN1 to connect the ADC circuit structure to the probe structure. The ADC module directly samples the electrical signal corresponding to the probe through the probe lead 21. A first current limiting module is set to avoid limiting the current in the sampling circuit and protect the circuit. This application does not specifically limit the specific types and implementation methods of the terminal CN1, probe lead 21, power supply module, first current limiting module, and ADC module. The ADC module can be implemented using an ADC chip, the first current limiting resistor can be implemented using a resistor, and the probe lead 21 can be implemented using metal wires, etc. Figure 3 As shown, the high-level probe PRB11 is connected to the third sampling terminal of the sampling module ADC via the P4 port of terminal CN1; the medium-level probe PRB12 is connected to the second sampling terminal of the sampling module ADC via the P3 port of terminal CN1; the low-level probe PRB13 is connected to the first sampling terminal of the sampling module ADC via the P2 port of terminal CN1; and the reference probe PRB0 is connected to the second terminal of the sampling module ADC via the P1 port of terminal CN1. The third sampling terminal of the sampling module ADC is connected to the high-level probe PRB11. The signal ADC_H is sampled. The second sampling terminal of the sampling module ADC samples the electrical signal ADC_M of the medium liquid level probe PRB12. The first sampling terminal of the sampling module ADC samples the electrical signal ADC_L of the low liquid level probe PRB13. A 1K ohm resistor R2 is used as the first current limiting module corresponding to the high liquid level probe PRB11. A 1K ohm resistor R4 is used as the first current limiting module corresponding to the medium liquid level probe PRB12. A 1K ohm resistor R7 is used as the first current limiting module corresponding to the low liquid level probe PRB13.

[0074] Specifically, the sampling module ADC can be used to acquire the electrical signal corresponding to the probe through ADC sampling. At the same time, the circuit is equipped with a terminal CN1 to facilitate circuit connection, a first current limiting module to protect the circuit, and a power supply module to provide the power required for probe detection. The structure is simple and easy to implement.

[0075] As an optional embodiment, the sampling module ADC further includes:

[0076] The second current limiting module has its first end connected to the first output end of the power module, and its second end connected to one end of the reference probe PRB0 through the terminal CN1 and probe lead 21.

[0077] And / or,

[0078] The third current limiting module has its first end connected to the second output end of the power module, and its second end connected to the first end of the first current limiting module.

[0079] It is easy to understand that, to further protect the circuit, a second current-limiting module and / or a third current-limiting module can be added to the sampling module ADC. The second current-limiting module further limits the current in the conduction loop, protecting the reference probe PRB0; the third current-limiting module prevents the power supply voltage output from the power module from impacting the working probe PRB1, further protecting the circuit. This application does not specifically limit the specific types and implementation methods of the second and third current-limiting modules; they can be implemented using components such as resistors. Figure 3 As shown, the second current limiting module is implemented using a 100-ohm resistor R9, and the third current limiting module includes a 1K-ohm resistor R3 corresponding to the high liquid level probe PRB11, a 1K-ohm resistor R6 corresponding to the medium liquid level probe PRB12, and a 1K-ohm resistor R8 corresponding to the low liquid level probe PRB13.

[0080] Specifically, the circuit and probe can be further protected by adding a second current limiting module and / or a third current limiting module, thereby improving the safety and reliability of the entire water level detection device. The structure is simple and easy to implement.

[0081] As an optional embodiment, the power module includes:

[0082] The first power supply submodule corresponding to the working probe PRB1 has its input end connected to the power supply, and its output end connected to one end of the working probe PRB1 through the terminal CN1 and the probe lead 21. It is used to output a high level when performing water level detection and flow rate detection, and to output a low level when performing ion balance.

[0083] The second power supply submodule corresponding to the reference probe PRB0 has its input end connected to the power supply, and its output end connected to one end of the reference probe PRB0 through the terminal CN1 and the probe lead 21. It is used to output a low level when performing water level detection and flow rate detection, and to output a high level when performing ion balance.

[0084] It is understandable that the power supply required for probe operation can be implemented using level signals, with the power supply voltage achieved through the potential difference between high and low levels. This requires setting up two independent power supply submodules, one for the working probe PRB1 and the other for the reference probe PRB0, to create this potential difference. Furthermore, to prevent scaling, ion balance can be achieved by controlling changes in the level. This application does not specifically limit the specific types and implementation methods of the first and second power supply submodules. The first power supply submodule needs to be designed based on the specific number of working probes PRB1. Regarding the specific implementation method of the level signals, this application does not specifically limit it; it can be implemented using methods such as PWM (Pulse Width Modulation) signals. Figure 3 As shown, the first power supply submodule is used to output a PWM_H signal to power the high liquid level probe PRB11, a PWM_M signal to power the medium liquid level probe PRB12, and a PWM_L signal to power the low liquid level probe PRB13. The second power supply submodule is used to output a PWM_COM signal to the reference probe PRB0, so as to form a conductive path in conjunction with the PWM_H signal, PWM_M signal, and PWM_L signal.

[0085] In one specific embodiment, the PWM_L, PWM_M, and PWM_H signals are set to high level, and the PWM_COM signal is set to low level for 250µs. During this time, the sampled values ​​of ADC_L, ADC_M, and ADC_H are detected, and the presence of water on each working probe PRB1 is determined based on these sampled values. Then, the PWM_L, PWM_M, and PWM_H signal pins are set to low level, and the PWM_COM signal is set to high level for 250µs to achieve ion balance and prevent scaling.

[0086] Specifically, the power supply is achieved through level signals, which allows for precise control of the output voltage. This helps improve the stability and reliability of the probe operation, reduces detection errors caused by power fluctuations, and facilitates integration, thus simplifying the implementation of the entire water level detection device.

[0087] Please refer to Figure 4 , Figure 4 A schematic diagram of a power module provided by this utility model. As an optional embodiment, the first power submodule includes:

[0088] The NE555DR 555 timer has its power supply terminal connected to the power supply, its ground terminal grounded, and its output terminal connected to one end of the working probe PRB1 via terminal CN1 and probe lead 21.

[0089] The first resistor R1 is connected to the power supply terminal of the NE555DR 555 timer.

[0090] First diode D1;

[0091] The cathode of the second diode D2 is connected to the second terminal of the first resistor R1, the anode of the first diode D1, and the discharge terminal of the 555 timer NE555DR, respectively.

[0092] The second resistor R5 has its first end connected to the cathode of the first diode D1 and its second end connected to the anode of the second diode D2.

[0093] The first capacitor C1 has its first end connected to the tap of the second resistor R5, the trigger terminal of the 555 timer NE555DR, and the threshold terminal of the 555 timer NE555DR, respectively, and its second end grounded.

[0094] It's easy to understand that a PWM hardware output circuit consisting of a 555 timer NE555DR and its peripheral circuitry can be used to output a level signal. The power supply terminal VCC and reset terminal RST of the 555 timer NE555DR are connected to a 5V power supply, and the ground terminal GND is grounded to ensure the normal operation of the 555 timer NE555DR and provide a high-level voltage reference for the output level signal. The discharge terminal DISCH, trigger terminal TRIS, and threshold terminal THRES of the 555 timer NE555DR are connected to the peripheral circuitry, which includes a first resistor R1, a first diode D1, a second diode D2, a second resistor R5, and a first capacitor C1. The power supply can charge the first capacitor C1 through the first resistor R1, the first diode D1, and the second resistor R5. The first capacitor C1 can also discharge through the second resistor R5, the second diode D2, and the first resistor R1. The charging and discharging process of the first capacitor C1 is used to determine the output signal of the 555 timer NE555DR. The first resistor R1, the second resistor R5, and the first capacitor C1 together form a charging and discharging circuit, determining the charging and discharging time of the first capacitor C1. This allows for precise adjustment of the frequency and duty cycle of the output signal of the 555 timer NE555DR, thus controlling the output signal at the OUT terminal of the 555 timer NE555DR. The second resistor R5 is a tapped resistor, allowing for different resistance values ​​to be achieved through different tap connections, thereby controlling and adjusting the output signal. The first diode D1 and the second diode D2 prevent reverse current in the external circuit from damaging the 555 timer NE555DR and also isolate the charging and discharging paths of the first capacitor C1. This application does not specifically limit the specific types and implementation methods of the first resistor R1, first diode D1, second diode D2, second resistor R5, first capacitor C1, and 555 timer NE555DR. This embodiment uses the first power supply submodule as an example for illustration; in actual applications, the second power supply submodule can also be set up in the same way, which will not be elaborated further here.

[0095] As an optional embodiment, the first power supply submodule further includes:

[0096] The second capacitor C2 has its first end connected to the control voltage terminal of the 555 timer NE555DR, and its second end grounded.

[0097] It is understandable that a second, grounded capacitor C2 can be further added to the control voltage terminal CONT of the NE555DR 555 timer. The second capacitor C2 serves as a filter and voltage regulator, ensuring precise control of the output signal by the NE555DR 555 timer and also increasing its anti-interference capability to some extent, thereby improving the stability and reliability of the first power supply submodule. This application does not specifically limit the specific type or implementation method of the second capacitor C2.

[0098] Specifically, the 555 timer NE555DR and its peripheral circuits can effectively output PWM signals, thereby meeting the power supply voltage required for probe detection. The entire circuit structure is simple and easy to implement, and the components used are low in cost, which is conducive to the simple implementation of the entire water level detection device.

[0099] To solve the above-mentioned technical problems, the present invention also provides a water storage system, including a water storage container T, a probe mounting base 22, and a water level detection device as described above. The working probe PRB1 and the reference probe PRB0 in the water level detection device are both mounted on the probe mounting base 22. The probe mounting base 22 is located on the top of the water storage container T to fix the working probe PRB1 and the reference probe PRB0 in the water storage container T.

[0100] It is easy to understand that, for ease of application, the probes in the water level detection device can be fixed by setting the probe mounting base 22. This application does not make any special restrictions on the specific type and implementation method of the probe mounting base 22. The probes can be fixed by means of plug-in fixing, etc. This application does not make any special restrictions.

[0101] For an introduction to the water storage system provided by this utility model, please refer to the above-described embodiment of the water level detection device; this utility model will not be described in detail here.

[0102] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, 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 said element.

[0103] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water level detection device, characterized in that, The water level detection device, applied to water storage containers, includes: Working probe; The sampling module has a first end connected to one end of the working probe, and is used to output power voltage to the working probe; A reference probe, one end of which is connected to the second end of the sampling module, is used to form a conductive loop with the working probe based on the liquid in the water storage container, so that the sampling module can detect the water level according to the resistance value of the conductive loop. An insulating sleeve, fitted onto the working probe and / or the reference probe, is used to ensure that when the water level in the water storage container changes within the range corresponding to the insulating sleeve, the rate of change of the resistance value of the conductive circuit does not exceed a preset threshold, so that the sampling module can detect the flow rate based on the length of the insulating sleeve.

2. The water level detection device according to claim 1, characterized in that, The working probe includes a low liquid level probe, a medium liquid level probe, and a high liquid level probe. The probe length of the low liquid level probe is greater than that of the medium liquid level probe, and the probe length of the medium liquid level probe is greater than that of the high liquid level probe. The probe length of the low liquid level probe is equal to that of the reference probe. One end of the low liquid level probe is connected to the first sampling end of the sampling module, one end of the medium liquid level probe is connected to the second sampling end of the sampling module, and one end of the high liquid level probe is connected to the third sampling end of the sampling module.

3. The water level detection device according to claim 2, characterized in that, The low liquid level probe, the medium liquid level probe, the high liquid level probe, and the reference probe are all fitted with several insulating sleeves, and the insulating sleeves on each probe are all fitted in the same position.

4. The water level detection device according to claim 1, characterized in that, Also includes: A temperature probe, one end of which is connected to the third end of the sampling module, is used to detect the temperature in the water storage container so that the sampling module can perform water level detection based on the temperature and the resistance value of the conductive circuit.

5. The water level detection device according to any one of claims 1 to 4, characterized in that, The sampling module includes: Terminal blocks are used to connect probe leads; The power module has a first output terminal connected to one end of the reference probe via the terminal block and the probe lead, for outputting power supply voltage. The first current limiting module has its first end connected to one end of the working probe via the terminal block and the probe lead, and is also connected to the second output terminal of the power module. The ADC module, with its input terminal connected to the second terminal of the first current limiting module, is used to sample the resistance value at one end of the working probe and convert the resistance value into a digital signal.

6. The water level detection device according to claim 5, characterized in that, The sampling module further includes: The second current limiting module has a first end connected to the first output end of the power module, and a second end connected to one end of the reference probe through the terminal block and the probe lead. And / or, The third current limiting module has its first end connected to the second output end of the power module and its second end connected to the first end of the first current limiting module.

7. The water level detection device according to claim 5, characterized in that, The power module includes: The first power supply submodule corresponding to the working probe has its input end connected to the power supply, and its output end connected to one end of the working probe through the terminal block and the probe lead. It is used to output a high level when performing water level detection and flow rate detection, and to output a low level when performing ion balance. The second power supply submodule corresponding to the reference probe has its input end connected to the power supply, and its output end connected to one end of the reference probe through the terminal block and the probe lead. It is used to output a low level when performing water level detection and flow rate detection, and to output a high level when performing ion balance.

8. The water level detection device according to claim 7, characterized in that, The first power supply submodule includes: The 555 timer has its power supply terminal connected to the power supply, its ground terminal grounded, and its output terminal connected to one end of the working probe via the terminal block and the probe lead. The first resistor has its first end connected to the power supply terminal of the 555 timer. First diode; The cathode of the second diode is connected to the second terminal of the first resistor, the anode of the first diode, and the discharge terminal of the 555 timer, respectively. The second resistor has its first end connected to the cathode of the first diode and its second end connected to the anode of the second diode. The first capacitor has its first end connected to the tap of the second resistor, the trigger terminal of the 555 timer, and the threshold terminal of the 555 timer, respectively, and its second end grounded.

9. The water level detection device according to claim 8, characterized in that, The first power supply submodule also includes: The second capacitor has its first end connected to the control voltage terminal of the 555 timer, and its second end grounded.

10. A water storage system, characterized in that, The device includes a water storage container, a probe mounting base, and a water level detection device as described in any one of claims 1 to 9, wherein the working probe and the reference probe in the water level detection device are both mounted on the probe mounting base, and the probe mounting base is disposed on the top of the water storage container to fix the working probe and the reference probe in the water storage container.

Images