Novel capacitance liquid level meter, monitoring system and method for monitoring liquid level of mobile equipment

Abstract

The invention relates to the technical field of liquid level meters, in particular to a novel capacitance liquid level meter for monitoring the liquid level of mobile equipment and a monitoring system and method.The novel capacitance liquid level meter comprises a meter head and a structural assembly, the structural assembly comprises a mounting flange, an adapter, a capacitance sensor, a protection component and a guide component, and the mounting flange is connected with the meter head through the adapter; the two ends of the adapter are fixedly connected with the meter head and the installation flange respectively, the capacitive sensor penetrates through the installation flange and is fixedly connected with the adapter, the protection component protects the capacitive sensor, and the guide component is arranged at the end, away from the adapter, of the capacitive sensor. The liquid level induction is inaccurate and unstable, and the service life is short.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid level meter, in particular to a novel capacitive liquid level meter for monitoring liquid level of mobile equipment, a monitoring system and a method. BACKGROUND

[0002] In mobile equipment such as ships, trains and trucks, the liquid level monitoring of liquefied gas, oil and other media is an important link to ensure the safe transportation and stable operation of the equipment. With the development of the logistics transportation industry and the improvement of safety supervision requirements, the real-time monitoring demand for the liquid level of media in mobile equipment is increasingly urgent.

[0003] Currently, the liquid level monitoring of mobile equipment mostly uses a floating ball liquid level meter, whose working principle is to rely on the floating ball to follow the liquid level to float, to detect the liquid level height through 24VDC power supply and to output a 4-20mA analog signal. However, this technology has obvious limitations in the liquid level measurement of mobile equipment: as a moving part, the floating ball will move back and forth on the sensor protection tube with the liquid, which not only affects the service life, but also leads to inaccurate and unstable liquid level sensing; the power supply relies on 24VDC direct current stabilized power supply, which cannot realize real-time power supply detection, and can only be measured by external power supply when the equipment is static; the output 4-20mA analog signal cannot be transmitted wirelessly over a long distance, and needs to be observed on site using a display instrument after stopping the mobile equipment, which is difficult to meet the needs of real-time monitoring of the liquid level of mobile equipment and the transmission of the Internet of Things.

[0004] Therefore, it is necessary to develop a new type of liquid level meter that can adapt to the dynamic monitoring scene of mobile equipment, has high stability and supports real-time data transmission, to solve the defects of the existing floating ball liquid level meter. SUMMARY

[0005] The present application relates to the technical field of liquid level meter, in particular to a novel capacitive liquid level meter for monitoring liquid level of mobile equipment, a monitoring system and a method.

[0006] To achieve the above-mentioned purpose, the present application provides a novel capacitive liquid level meter for monitoring liquid level of mobile equipment, a monitoring system and a method, which comprises a meter head and a structural assembly, the structural assembly comprises a mounting flange, an adapter, a capacitive sensor, a protection member and a guide member, the mounting flange is connected with the meter head through the adapter, the two ends of the adapter are fixedly connected with the meter head and the mounting flange respectively, the capacitive sensor penetrates through the mounting flange and is fixedly connected with the adapter, the protection member protects the capacitive sensor, and the guide member is arranged at one end of the capacitive sensor away from the adapter.

[0007] The protective component includes a protective layer and a protective tube. The protective layer is disposed on the outside of the capacitive sensor. The protective tube is fixedly connected to the mounting flange and is sleeved on the outside of the capacitive sensor.

[0008] The protective layer is made of polytetrafluoroethylene and wraps around the outside of the capacitive sensor; the protective tube is made of stainless steel.

[0009] The guide component includes a welding base, a guide tube, and a spring. The guide tube is fixedly connected to the welding base and is located on one side of the welding base. The spring is fixedly connected to the guide tube and is located inside the guide tube. The protective tube extends into the guide tube, cooperates with the guide tube, and contacts the spring.

[0010] The structural component further includes a lower fixing block, which is fixedly connected to the capacitive sensor and in contact with the protective tube.

[0011] The present invention also provides a novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices, which is applied to the novel capacitive level gauge for monitoring liquid levels in mobile devices;

[0012] The system includes a signal input module, a signal processing module, a power management module, a signal output module, and an IoT board. The signal processing module receives signal data from the signal input module. The power management module provides operating voltage to the signal input module, the signal processing module, and the signal output module. The signal output module outputs the signal data processed by the signal processing module. The IoT board is connected to the signal output module.

[0013] The signal input module is used to receive the capacitance change signal generated by the capacitance sensor and convert it.

[0014] The signal processing module is used to process the digital signal transmitted by the signal input module and convert the capacitance change into corresponding liquid level height information.

[0015] The power management module is used to stabilize the input voltage output at 3.3V;

[0016] The signal output module is used to output digital signals as TTL level signals;

[0017] The IoT board is used to receive TTL level signals and transmit liquid level information to the central control room and terminal equipment through IoT technology.

[0018] The power management module includes an output submodule and a protection submodule.

[0019] The output submodule is used to output a stable 3.3V operating voltage;

[0020] The protection submodule is used to provide circuit protection.

[0021] The protection submodule includes an overcurrent protection unit, an overheat protection unit, and a short-circuit protection unit.

[0022] The overcurrent protection unit is used to cut off the circuit or limit the current when the current in the circuit exceeds a set threshold, so as to prevent damage to circuit components due to overcurrent.

[0023] The overheat protection unit is used to trigger a protection mechanism when the circuit temperature exceeds a preset temperature value;

[0024] The short-circuit protection unit is used to cut off the power supply or limit the short-circuit current when a short-circuit fault occurs in the circuit.

[0025] The present invention also provides a novel capacitive level gauge monitoring method for monitoring liquid levels in mobile devices, which is applied to the novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices;

[0026] Includes the following steps;

[0027] The capacitive sensor senses changes in the liquid level of the medium inside the mobile device and generates a corresponding capacitance change signal.

[0028] The signal input module receives capacitance change signals, converts them into digital signals, and transmits them to the signal processing module.

[0029] The signal processing module processes the received digital signal according to the relationship between capacitance change and liquid level height, and converts the capacitance change into corresponding liquid level height information.

[0030] The signal processing module converts the liquid level information into a TTL level signal by configuring the GPIO pins, and then outputs it through the signal output module.

[0031] The TTL level signal output by the signal output module is transmitted to the Internet of Things (IoT) board, and the IoT board sends the liquid level information to the central control room and terminal equipment in real time via a wireless network.

[0032] The power management module continuously provides a stable 3.3V operating voltage to the signal input module, the signal processing module, and the signal output module, and provides overcurrent, overheat, and short-circuit protection to the circuit through the protection submodule.

[0033] This invention discloses a novel capacitive level gauge, monitoring system, and method for monitoring liquid levels in mobile devices. The system includes a gauge head and structural components. The structural components include a mounting flange, an adapter, a capacitive sensor, a protective component, and a guide component. The mounting flange is connected to the gauge head via the adapter. Both ends of the adapter are fixedly connected to the gauge head and the mounting flange, respectively. The capacitive sensor passes through the mounting flange and is fixedly connected to the adapter. The protective component protects the capacitive sensor. The guide component is located at the end of the capacitive sensor furthest from the adapter. This invention solves the problems of inaccurate and unstable liquid level sensing and short service life in existing level gauges used in mobile devices. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0035] Figure 1 This is a schematic diagram of the overall structure of the novel capacitive level gauge for monitoring the liquid level of mobile devices according to the present invention.

[0036] Figure 2 This is a schematic diagram of the structure of the protective tube of the present invention.

[0037] Figure 3 This is a schematic diagram of the protective layer of the present invention.

[0038] Figure 4 This is a structural schematic diagram of the guide component of the present invention.

[0039] Figure 5 This is a schematic diagram of the structure of the novel capacitive liquid level gauge monitoring system for monitoring the liquid level of mobile devices according to the present invention.

[0040] Figure 6 This is a schematic diagram of the power management module of the present invention.

[0041] Figure 7 This is a schematic diagram of the structure of the protection submodule of the present invention.

[0042] Figure 8 This is a schematic diagram of the steps of the novel capacitive level gauge monitoring method for monitoring the liquid level of mobile devices according to the present invention.

[0043] In the diagram: 101-meter head, 102-mounting flange, 103-adapter, 104-capacitive sensor, 105-protective layer, 106-protective tube, 107-welding base, 108-guide tube, 109-spring, 110-lower fixing block, 201-signal input module, 202-signal processing module, 203-power management module, 204-signal output module, 205-IoT board, 206-output sub-module, 207-protection sub-module, 208-overcurrent protection unit, 209-overheat protection unit, 210-short circuit protection unit. Detailed Implementation

[0044] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0045] The embodiment of this application is as follows:

[0046] Please see Figures 1-7 , Figure 1 This is a schematic diagram of the overall structure of the novel capacitive level gauge for monitoring liquid levels in mobile devices according to the present invention. Figure 2 This is a schematic diagram of the structure of the protective tube 106 of the present invention. Figure 3 This is a schematic diagram of the structure of the protective layer 105 of the present invention. Figure 4 This is a structural schematic diagram of the guide component of the present invention. Figure 5 This is a schematic diagram of the structure of the novel capacitive level gauge monitoring system for monitoring the liquid level of mobile devices according to the present invention. Figure 6 This is a schematic diagram of the power management module 203 of the present invention. Figure 7 This is a schematic diagram of the structure of the protection submodule 207 of the present invention.

[0047] This invention discloses a novel capacitive level gauge, monitoring system, and method for monitoring liquid levels in mobile devices. The system includes a gauge head 101, a mounting flange 102, an adapter 103, a capacitive sensor 104, a protective layer 105, a protective tube 106, a welding base 107, a guide tube 108, a spring 109, and a lower fixing block 110. This invention solves the problems of inaccurate and unstable liquid level sensing and short service life in existing level gauges used in mobile devices. It is understood that this solution can also be used to accurately monitor changes in liquid level and improve service life.

[0048] In this embodiment, the meter head 101 is composed of a capacitor main board, a stainless steel housing, a front cover, and a rear cover. Through the above structural components, the problems of inaccurate and unstable liquid level sensing and short service life of existing liquid level gauges in mobile devices are solved.

[0049] The mounting flange 102 is connected to the meter head 101 via the adapter 103. Both ends of the adapter 103 are fixedly connected to the meter head 101 and the mounting flange 102, respectively. The capacitive sensor 104 passes through the mounting flange 102 and is fixedly connected to the adapter 103. The protective component protects the capacitive sensor 104. The guide component is located at the end of the capacitive sensor 104 away from the adapter 103. The mounting flange 102 can be adjusted according to the user's actual needs for easy installation on mobile devices. The bottom end of the adapter 103 is welded to the mounting flange 102, and the top end of the adapter 103 extends into the meter head 101 and is fixedly connected to the meter head 101 by bolts. One end of the capacitive sensor 104 passes through the mounting flange 102 and is fixedly connected to the adapter 103 via a clamping nut. The protective component is disposed on the outside of the capacitive sensor 104 body to protect the capacitive sensor 104. The guide component is installed inside the mobile device (e.g., the bottom of the tank of a liquefied natural gas tanker). The bottom end of the capacitive sensor 104 can be connected to the guide component through the protective component, thereby providing reliable support for the bottom end of the capacitive sensor. This prevents the capacitive sensor 104 from shaking during the movement of the mobile device, thus improving its service life and monitoring accuracy. This solves the problems of inaccurate and unstable liquid level sensing and short service life of existing liquid level gauges in mobile devices.

[0050] Secondly, the protective layer 105 is disposed on the outside of the capacitive sensor 104; the protective tube 106 is fixedly connected to the mounting flange 102 and sleeved on the outside of the capacitive sensor 104. The protective layer 105 is a material protective layer 105, which protects the capacitive sensor 104 by wrapping the outside of the capacitive sensor 104 with a special material. The protective tube 106 is a physical protective layer 105, which covers the outside of the capacitive sensor 104. By disposing of the protective layer 105 and the protective tube 106 on the outside of the capacitive sensor 104, the capacitive sensor 104 can be protected.

[0051] Meanwhile, the protective layer 105 is made of polytetrafluoroethylene (PTFE) and wraps around the outside of the capacitive sensor 104; the protective tube 106 is made of stainless steel. The PTFE material and the capacitive sensor 104 are integrally formed by a mold, which ensures the uniformity and density of the PTFE layer, as well as the uniformity of the dimensions with the capacitive sensor 104. Furthermore, the PTFE material has good high and low temperature resistance. The protective tube 106 is made of 316L stainless steel and has three evenly spaced holes. Through the PTFE material and the stainless steel material, the capacitive sensor 104 is protected.

[0052] Additionally, the guide tube 108 is fixedly connected to the welding base 107 and located on one side of the welding base 107; the spring 109 is fixedly connected to the guide tube 108 and located inside the guide tube 108; the protective tube 106 extends into the guide tube 108 and cooperates with the guide tube 108, and contacts the spring 109. The welding base 107 is used for welding inside the mobile device. The fixing positions of the spring 109 and the guide tube 108 are marked on the welding base 107 according to process requirements, and then argon arc welding is used to weld and fix them respectively, thus fixing the mounting flange 102 to the mobile device. The electric sensor and the protective tube 109... The six probes extend into the mobile device. Based on the landing points of the capacitance sensor 104 and the protective tube 106, the welding position of the welding base 107 is determined. The welding base 107 is then welded into the mobile device using a welding device. The bottom end of the protective tube 106 can be inserted into the guide tube 108 and contact the spring 109. The guide tube 108 guides and limits the protective tube 106, and the spring 109 acts as a buffer. Through the guide tube 108, the protective tube 106 can be reinforced and protected from the impact caused by liquid sloshing in the mobile device. This allows the capacitance sensor 104 to stably measure the medium inside the mobile device, improving detection stability.

[0053] Finally, the lower fixing block 110 is fixedly connected to the capacitive sensor 104 and contacts the protective tube 106. The lower fixing block 110 is fixedly sleeved on the capacitive sensor 104 near the bottom end. The lower fixing block 110 abuts against the inner wall of the protective tube 106, so that the bottom end of the capacitive sensor 104 can be stably supported, preventing the capacitive sensor 104 from shaking inside the protective tube 106. The stability of the capacitive sensor 104 can be improved by the lower fixing block 110.

[0054] This invention also provides a novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices, which is applied to the novel capacitive level gauge for monitoring liquid levels in mobile devices.

[0055] The system includes a signal input module 201, a signal processing module 202, a power management module 203, a signal output module 201, and an IoT board 205. The signal processing module 202 receives signal data from the signal input module 201. The power management module 203 provides operating voltage to the signal input module 201, the signal processing module 202, and the signal output module 201. The signal output module 201 outputs the signal data processed by the signal processing module 202. The IoT board 205 is connected to the signal output module 201.

[0056] The signal input module 201 is used to receive the capacitance change signal generated by the capacitance sensor 104 and perform conversion processing on it.

[0057] The signal processing module 202 is used to process the digital signal transmitted by the signal input module 201 and convert the capacitance change into corresponding liquid level height information.

[0058] The power management module 203 is used to stabilize the input voltage output at 3.3V;

[0059] The signal output module 201 is used to output digital signals as TTL level signals.

[0060] The IoT board 205 is used to receive TTL level signals and transmit liquid level information to the central control room and terminal equipment through IoT technology.

[0061] The signal processing module 202 is the front-end unit for sensing liquid level changes in the system. Its core function is to receive the capacitance change signal generated by the capacitance sensor 104 due to the liquid level change and to convert and process the signal. The capacitance sensor 104, based on the principle of capacitance change (ΔCx=2πεrε0ΔH / δ), converts the change in liquid level height into a change in capacitance. After the signal input module 201 captures this capacitance change signal, it converts the analog capacitance signal into a digital signal through an internally integrated conversion circuit (such as using an FDC1004 chip, a high-resolution 4-channel capacitance-to-digital converter), providing a standardized data format for subsequent processing.

[0062] The signal processing module 202, acting as the "central hub" of the system, is responsible for receiving and processing the digital signals transmitted by the signal input module 201. Its core task is to accurately convert the capacitance change represented by the digital signal into corresponding liquid level information based on the relationship between capacitance change and liquid level height. This module employs a low-power microcontroller (such as the MSP430G2513 chip) and uses built-in algorithms to analyze and calculate the digital signal, eliminating the influence of environmental interference factors to ultimately obtain accurate liquid level height data.

[0063] The power management module 203 provides energy support for the stable operation of the entire system. Its core function is to stably output the input voltage at 3.3V, providing a reliable operating voltage for the signal input module 201, the signal processing module 202, and the signal output module 201.

[0064] The signal output module 201 serves as a bridge for communication between the system and external devices. Its function is to convert the digital liquid level signal output by the signal processing module 202 into a TTL level signal and output it. The TTL level signal (high level 3.3V, low level 0V) has the characteristics of strong anti-interference ability and easy recognition by digital devices. It can be directly received by the subsequent IoT board 205, laying the foundation for wireless data transmission.

[0065] The IoT board 205 is directly connected to the signal output module 201, and is responsible for receiving the TTL level signal transmitted by the signal output module 201. It then transmits the liquid level information in real time to the central control room and terminal equipment via IoT technology (such as a wireless network based on a wireless communication protocol). Through this process, staff can remotely monitor the liquid level status of the medium within the mobile equipment in real time, achieving dynamic monitoring and management of the liquid level.

[0066] Secondly, the power management module 203 includes an output submodule 206 and a protection submodule 207;

[0067] The output submodule 206 is used to output a stable 3.3V operating voltage;

[0068] The protection submodule 207 is used to provide circuit protection.

[0069] The output submodule 206 uses a low-dropout linear regulator (such as the SC4213-3.3 chip) to regulate the input voltage to 3.3V through an internal voltage regulation circuit, ensuring the stability of the output voltage and meeting the accuracy requirements of each module for the power supply voltage.

[0070] The protection submodule 207 is used to ensure circuit safety and prevent system damage due to abnormal operating conditions.

[0071] Then, the protection submodule 207 includes an overcurrent protection unit 208, an overheat protection unit 209, and a short-circuit protection unit 210.

[0072] The overcurrent protection unit 208 is used to cut off the circuit or limit the current when the current in the circuit exceeds a set threshold, so as to prevent damage to circuit components due to overcurrent.

[0073] The overheat protection unit 209 is used to trigger a protection mechanism when the circuit temperature exceeds a preset temperature value;

[0074] The short-circuit protection unit 210 is used to cut off the power supply or limit the short-circuit current when a short-circuit fault occurs in the circuit.

[0075] The overcurrent protection unit 208 responds quickly when the current in the circuit exceeds a preset threshold. It prevents excessive current from flowing through core components such as the signal input module 201 and the signal processing module 202 by cutting off the circuit path or limiting the current magnitude, thus avoiding component burnout or performance degradation due to overcurrent.

[0076] The overheat protection unit 209 triggers a protection mechanism (such as reducing the module's operating power, suspending unnecessary functions, or cutting off the power supply) when the circuit's operating temperature exceeds a preset safety value. This prevents the circuit from aging due to long-term high-temperature operation, causing component parameter drift, or even failure, and ensures that the system operates stably within a suitable temperature range.

[0077] The short-circuit protection unit 210 immediately activates when a short-circuit fault occurs in the circuit (such as a sudden drop in resistance due to accidental connection of the line). It quickly cuts off the power supply or limits the short-circuit current within a safe range to prevent the instantaneous large current generated by the short circuit from causing impact damage to the power management module 203 and other circuit components, thereby reducing the risk of the fault escalating.

[0078] After system startup, the output submodule 206 of the power management module 203 continuously provides a stable 3.3V voltage, and the protection submodule 207 monitors the circuit status in real time. The capacitance sensor 104 senses changes in liquid level and generates a capacitance signal, which is converted into a digital signal by the signal input module 201 and transmitted to the signal processing module 202. The signal processing module 202 calculates the liquid level height information, which is then converted into a TTL level signal by the signal output module 201. The IoT board 205 receives the TTL signal and sends the data to the central control room and terminal devices via IoT technology, realizing real-time monitoring of the liquid level. Throughout the process, all modules cooperate to ensure stable and efficient system operation.

[0079] This invention also provides a novel capacitive level gauge monitoring method for monitoring liquid levels in mobile devices, applicable to the novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices.

[0080] Includes the following steps;

[0081] S1; Capacitive sensor 104 senses the change in the liquid level of the medium inside the mobile device and generates a corresponding capacitance change signal.

[0082] S2; Signal input module 201 receives capacitance change signal, converts it into digital signal and transmits it to signal processing module 202;

[0083] S3; The signal processing module 202 processes the received digital signal according to the relationship between capacitance change and liquid level height, and converts the capacitance change into corresponding liquid level height information.

[0084] S4; The signal processing module 202 converts the liquid level height information into a TTL level signal by configuring the GPIO pin, and outputs it through the signal output module 201;

[0085] S5; The TTL level signal output by the signal output module 201 is transmitted to the IoT board 205, and the IoT board 205 sends the liquid level information to the central control room and terminal equipment in real time through the wireless network;

[0086] S6; The power management module 203 continuously provides a stable 3.3V operating voltage to the signal input module 201, the signal processing module 202 and the signal output module 201, and provides overcurrent, overheat and short-circuit protection for the circuit through the protection submodule 207.

[0087] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A novel capacitive level gauge for monitoring liquid levels in mobile devices, comprising a meter head, characterized in that, It also includes structural components; The structural components include a mounting flange, an adapter, a capacitive sensor, a protective component, and a guide component. The mounting flange is connected to the meter head via the adapter. Both ends of the adapter are fixedly connected to the meter head and the mounting flange, respectively. The capacitive sensor passes through the mounting flange and is fixedly connected to the adapter. The protective component protects the capacitive sensor. The guide component is located at the end of the capacitive sensor away from the adapter.

2. The novel capacitive level gauge for monitoring liquid levels in mobile devices as described in claim 1, characterized in that, The protective component includes a protective layer and a protective tube. The protective layer is disposed on the outside of the capacitive sensor. The protective tube is fixedly connected to the mounting flange and is sleeved on the outside of the capacitive sensor.

3. The novel capacitive level gauge for monitoring liquid levels in mobile devices as described in claim 2, characterized in that, The protective layer is made of polytetrafluoroethylene and wraps around the outside of the capacitive sensor; the protective tube is made of stainless steel.

4. The novel capacitive level gauge for monitoring liquid levels in mobile devices as described in claim 2, characterized in that, The guide component includes a welding base, a guide tube, and a spring. The guide tube is fixedly connected to the welding base and is located on one side of the welding base. The spring is fixedly connected to the guide tube and is located inside the guide tube. The protective tube extends into the guide tube, cooperates with the guide tube, and contacts the spring.

5. The novel capacitive level gauge for monitoring liquid levels in mobile devices as described in claim 2, characterized in that, The structural component also includes a lower fixing block, which is fixedly connected to the capacitive sensor and in contact with the protective tube.

6. A novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices, applied to the novel capacitive level gauge for monitoring liquid levels in mobile devices as described in any one of claims 1-5, characterized in that, The system includes a signal input module, a signal processing module, a power management module, a signal output module, and an IoT board. The signal processing module receives signal data from the signal input module. The power management module provides operating voltage to the signal input module, the signal processing module, and the signal output module. The signal output module outputs the signal data processed by the signal processing module. The IoT board is connected to the signal output module. The signal input module is used to receive the capacitance change signal generated by the capacitance sensor and convert it. The signal processing module is used to process the digital signal transmitted by the signal input module and convert the capacitance change into corresponding liquid level height information. The power management module is used to stabilize the input voltage output at 3.3V; The signal output module is used to output digital signals as TTL level signals; The IoT board is used to receive TTL level signals and transmit liquid level information to the central control room and terminal equipment through IoT technology.

7. The novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices as described in claim 6, characterized in that, The power management module includes an output submodule and a protection submodule; The output submodule is used to output a stable 3.3V operating voltage; The protection submodule is used to provide circuit protection.

8. The novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices as described in claim 7, characterized in that, The protection submodule includes an overcurrent protection unit, an overheat protection unit, and a short-circuit protection unit. The overcurrent protection unit is used to cut off the circuit or limit the current when the current in the circuit exceeds a set threshold, so as to prevent damage to circuit components due to overcurrent. The overheat protection unit is used to trigger a protection mechanism when the circuit temperature exceeds a preset temperature value; The short-circuit protection unit is used to cut off the power supply or limit the short-circuit current when a short-circuit fault occurs in the circuit.

9. A novel capacitive level gauge monitoring method for monitoring liquid levels in mobile devices, applied to the novel capacitive level gauge monitoring system for monitoring liquid levels in mobile devices as described in any one of claims 6-8. Its features are, Includes the following steps; The capacitive sensor senses changes in the liquid level of the medium inside the mobile device and generates a corresponding capacitance change signal. The signal input module receives capacitance change signals, converts them into digital signals, and transmits them to the signal processing module. The signal processing module processes the received digital signal according to the relationship between capacitance change and liquid level height, and converts the capacitance change into corresponding liquid level height information. The signal processing module converts the liquid level information into a TTL level signal by configuring the GPIO pins, and then outputs it through the signal output module. The TTL level signal output by the signal output module is transmitted to the Internet of Things (IoT) board, and the IoT board sends the liquid level information to the central control room and terminal equipment in real time via a wireless network. The power management module continuously provides a stable 3.3V operating voltage to the signal input module, the signal processing module, and the signal output module, and provides overcurrent, overheat, and short-circuit protection to the circuit through the protection submodule.

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