A device and method for non-magnetic self-adaptive adjustment of excitation and capacitance of an internet of things water meter

Abstract

The application is suitable for the technical field of non-magnetic electromechanical conversion, and relates to a device and a method for adaptively adjusting excitation and capacitance of a water meter in an Internet of Things, which comprises an excitation adaptive adjustment module, a primary coil module, a secondary coil induction module, a discharge control module, a capacitance value adaptive adjustment module, an ADC sampling module and a master control module; the excitation adaptive adjustment module, the primary coil module, the secondary coil module, the discharge control module, the capacitance value adaptive adjustment module and the ADC sampling module are sequentially connected in communication, and the master control module is connected in communication with the excitation adaptive adjustment module, the discharge control module, the capacitance value adaptive adjustment module and the ADC sampling module respectively.The application has simple structure and convenient operation, solves the problems of capacitance value attenuation and pulse loss of non-magnetic measurement in a long-term operation process, and thus ensures the stability and reliability of non-magnetic measurement.

Description

Technical Field

[0001] This invention belongs to the field of non-magnetic electromechanical conversion technology, and particularly relates to a device and method for non-magnetic adaptive adjustment of excitation and capacitance in Internet of Things (IoT) water meters. Background Technology

[0002] Currently, the flow rate or volume of fluids such as liquids or gases is measured by the fluid driving mechanical parts to rotate, and the flow rate or volume is calculated based on the rotation of these mechanical parts. Mechanical methods for fluid measurement include magnetic sensing and non-magnetic measurement. The mainstream method is magnetic measurement. In magnetic measurement devices, the permanent magnet is in a rotating position. When a magnetic sensor passes near the magnet, it causes the magnet to move. However, this method is easily affected by external magnetic interference, leading to measurement errors. Non-magnetic measurement, on the other hand, can achieve measurement without a magnet trigger and boasts higher stability and accuracy. It truly achieves drip measurement and can provide early warnings based on the water usage habits of elderly people living alone, addressing their safety concerns. Furthermore, non-magnetic measurement has strong resistance to strong magnetic interference and is gradually replacing magnetic measurement.

[0003] While non-magnetic metering represents a technological breakthrough for water metering, it also has its own drawbacks. Due to the randomness of the assembly process, the distance between the non-magnetic module's signaling position and the semi-metallic disk varies, leading to poor consistency. Slightly larger distances can result in pulse loss. Furthermore, most non-magnetic meters on the market rely on voltage detection for measurement. The voltage detection industry primarily depends on the charging and discharging of NPO capacitors. To achieve electromechanical conversion, water meters require approximately 2.5 billion to 15.7 billion charge-discharge cycles per cycle. Under such high-frequency charging and discharging conditions, the capacitance will gradually decrease over time and due to changes in external temperature and humidity. Depending on the degree of decrease, issues such as severe leakage, short circuits, and reduced capacitance may occur. These problems will directly lead to non-magnetic metering failure or loss of metering function, compromising the stability and reliability of non-magnetic metering. Patent CN111238584B discloses an anti-interference circuit for a non-magnetic metering sensor, comprising a four-core twisted-pair shielded cable, a first capacitor, and a second capacitor. The four-core twisted-pair shielded cable connects the NB water / gas meter transmission module and the non-magnetic metering sensor, and includes a VDD line, a GND line, a positive pulse line, and a negative pulse line. The VDD line and the positive pulse line are twisted, as are the GND line and the negative pulse line. The outer layer of the four-core twisted-pair shielded cable is a metal shielding layer connected to the ground of the non-magnetic metering sensor. The first capacitor and the second capacitor are connected between the positive pulse line and the GND line, respectively. This patent ensures the accuracy of non-magnetic metering by eliminating harmful waveforms induced on the positive and negative pulse signal lines. However, it does not provide relevant technical solutions for the pulse loss and capacitance attenuation problems present in existing technologies.

[0004] Therefore, how to solve the problems of capacitance decay and pulse loss in non-magnetic metering during long-term operation, so as to ensure the stability and reliability of non-magnetic metering, is a key area that urgently needs to be studied by researchers in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device for adaptively adjusting the excitation and capacitance of an IoT water meter without magnetism, thereby solving the problems of capacitance attenuation and pulse loss during long-term operation of non-magnetic metering in existing technologies, which lead to low stability and reliability of non-magnetic metering. In addition, this invention also provides a method for adaptively adjusting the excitation and capacitance of an IoT water meter without magnetism.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a device for non-magnetic adaptive adjustment of excitation and capacitance in an Internet of Things (IoT) water meter, comprising:

[0008] The excitation adaptive adjustment module is used to calculate the intensity of the non-magnetic signal based on the AD value sampled by the ADC sampling module, and to adaptively adjust the sampled AD value within a qualified range.

[0009] The primary coil module is used to receive the excitation signal from the excitation adaptive adjustment module and generate an induced current;

[0010] The secondary coil induction module is used to receive the induced current and discharge it through the discharge control module.

[0011] A discharge control module is used to discharge the capacitor value adaptive adjustment module so that the capacitor value adaptive adjustment module can work.

[0012] The capacitor value adaptive adjustment module is used to adjust the capacitor value according to the AD value sampled by the ADC sampling module when the excitation adaptive adjustment module cannot complete the adjustment.

[0013] The ADC sampling module is used to sample the AD value of the water meter and return it to the main control module;

[0014] The main control module is used to control the excitation adaptive adjustment module, the discharge control module, and the capacitor value adaptive adjustment module, and is also used to receive the water meter AD value sampled by the ADC sampling module.

[0015] The excitation adaptive adjustment module, primary coil module, secondary coil module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module are sequentially connected in communication. The main control module is also connected in communication with the excitation adaptive adjustment module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module.

[0016] Furthermore, the adaptive capacitance adjustment module includes capacitors C1, C2, and C3, switch K1, and switch K2. Capacitors C1 and C3 are connected in series, and capacitors C3 and C2 are connected in parallel. The two ends of switch K1 are connected to the two ends of capacitor C1, and the two ends of switch K2 are connected to the two ends of capacitor C2.

[0017] Furthermore, the capacitance values ​​of capacitors C1, C2, and C3 are equal, and all are NPO capacitors.

[0018] Secondly, the present invention also provides a method for non-magnetic adaptive adjustment of excitation and capacitance in an Internet of Things (IoT) water meter, comprising the following steps:

[0019] S10: The main control module triggers the excitation adaptive adjustment module to generate an excitation signal, the primary coil module works, and the secondary coil induction module generates an induced current, which is added to the capacitor value adaptive adjustment module.

[0020] S20, the ADC sampling module collects the voltage value of the water meter rotating one revolution on the capacitor and converts it into an AD value, which is then transmitted to the main control module;

[0021] S30. The main control module obtains the AD value by comparison, gets the maximum and minimum values ​​of the AD value, and calculates the strength of the non-magnetic signal and the upper limit of the AD value.

[0022] S40. If the intensity of the non-magnetic signal exceeds the upper limit of the AD value, the excitation adaptive adjustment module increases the excitation count by 1. If the excitation adaptive adjustment module increases the count by more than 5, it is considered that there is a fault in the circuit discharge loop and an alarm message is issued. If the excitation adaptive adjustment module increases the count by less than 5, it returns to step S20 until the AD value does not exceed the upper limit.

[0023] S50. If the intensity of the non-magnetic signal is lower than the lower limit of the AD value, the excitation adaptive adjustment module reduces the excitation count by 1. If the excitation adaptive adjustment module reduces the count by less than or equal to 5, it is determined whether the intensity of the non-magnetic signal meets the requirements. If it does not meet the requirements, it returns to step S40. If the excitation adaptive adjustment module reduces the count by more than 5, the main control module controls the capacitor value adaptive adjustment module to be turned on, switch K1 is closed, and switch K2 is opened.

[0024] S60. The main control module determines whether the number of adjustments by the capacitor value adaptive adjustment module is greater than 1. If yes, the main control module controls the switch K1 of the capacitor value adaptive adjustment module to open and the switch K2 to close, and returns to step S10. If no, it directly returns to step S10.

[0025] Furthermore, in step S10, the default number of excitations for the excitation adaptive adjustment module is 10.

[0026] Furthermore, in step S30, the intensity of the non-magnetic signal is the difference between the maximum and minimum values ​​of the AD value, and the upper limit of the AD value is 80% of the AD value.

[0027] Furthermore, in step S60, the activation of the capacitor value adaptive adjustment module once indicates that the adjustment count is 1, and the adjustment count is no more than 2 times.

[0028] The device and method for non-magnetic adaptive adjustment of excitation and capacitance in IoT water meters provided by this invention have at least the following advantages compared with the prior art:

[0029] In existing technologies, the stability and reliability of non-magnetic metering cannot be guaranteed due to inherent problems with the non-magnetic module itself or attenuation from electromechanical conversion. This invention features a simple structure and convenient operation. Based on the sampled capacitor voltage value (AD value), the excitation count is adjusted from the default count to ensure the sampled voltage value and the non-magnetic signal strength are within a suitable range. When the excitation count of the adaptive adjustment module cannot meet the requirements of the sampled voltage value and the non-magnetic signal strength, the software determines whether the capacitor has attenuated due to long-term operation, resulting in capacitance loss or leakage / short circuit. It then selects a backup capacitor capacitance adaptive adjustment module to compensate for the capacitor's capacitance value in the circuit. The adaptive adjustment of the excitation count is then initiated again, ensuring the sampled capacitor voltage value and the non-magnetic signal strength are within a reasonable range. This solves various capacitor problems caused by production installation, component discreteness, and external operation, fundamentally addressing the reliability engineering problems of non-magnetic operation. It eliminates the problems of capacitance attenuation and pulse loss during long-term operation, thus ensuring the stability and reliability of non-magnetic metering. Attached Figure Description

[0030] To more clearly illustrate the solutions of the present invention, a brief introduction will be given to the drawings used in the description of the embodiments below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 A structural block diagram of a device for non-magnetic adaptive adjustment of excitation and capacitance in an Internet of Things (IoT) water meter, provided in an embodiment of the present invention;

[0032] Figure 2 A partial circuit diagram of the capacitor value adaptive adjustment module of a device for non-magnetic adaptive adjustment excitation and capacitor of an Internet of Things water meter provided in an embodiment of the present invention;

[0033] Figure 3The flowchart illustrates a method for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter, as provided in this embodiment of the invention. Detailed Implementation

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0035] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this invention, when an element is referred to as "fixed to," "mounted to," "disposed of," or "connected to" another element, it may be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to that other element.

[0036] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] This invention provides a device for adaptively adjusting the excitation and capacitance of an IoT water meter without magnetism, applied in the non-magnetic metering process of the IoT water meter. The device for adaptively adjusting the excitation and capacitance of the IoT water meter without magnetism includes:

[0038] The excitation adaptive adjustment module is used to calculate the intensity of the non-magnetic signal based on the AD value sampled by the ADC sampling module, and to adaptively adjust the sampled AD value within a qualified range.

[0039] The primary coil module is used to receive the excitation signal from the excitation adaptive adjustment module and generate an induced current;

[0040] The secondary coil induction module is used to receive the induced current and discharge it through the discharge control module.

[0041] A discharge control module is used to discharge the capacitor value adaptive adjustment module so that the capacitor value adaptive adjustment module can work.

[0042] The capacitor value adaptive adjustment module is used to adjust the capacitor value according to the AD value sampled by the ADC sampling module when the excitation adaptive adjustment module cannot complete the adjustment.

[0043] The ADC sampling module is used to sample the AD value of the water meter and return it to the main control module;

[0044] The main control module is used to control the excitation adaptive adjustment module, the discharge control module, and the capacitor value adaptive adjustment module, and is also used to receive the water meter AD value sampled by the ADC sampling module.

[0045] The excitation adaptive adjustment module, primary coil module, secondary coil module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module are sequentially connected in communication. The main control module is also connected in communication with the excitation adaptive adjustment module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module.

[0046] This invention has a simple structure and is easy to operate. It solves the problems of capacitance attenuation and pulse loss that exist in non-magnetic metering during long-term operation, thereby ensuring the stability and reliability of non-magnetic metering.

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0048] This invention provides a method for adaptively adjusting excitation and capacitance in IoT water meters during non-magnetic metering. The technical solution provided by this invention differs from existing solutions. This invention adds an excitation self-adjustment module and a capacitance value adaptive adjustment module. The excitation self-adjustment module calculates the non-magnetic signal strength and the sampled AD value based on the AD value returned by the ADC sampling module to the main control module and adaptively adjusts them within a qualified range. The capacitance value adaptive adjustment module uses a switch control method to select the capacitor and change its capacitance value. Normally, the capacitor has a default value. Only when the excitation self-adjustment module repeatedly fails to bring the non-magnetic signal strength and the sampled AD value within a qualified range, is the capacitance value adaptive adjustment module triggered to change the capacitance value in hardware. Figure 1 and Figure 2 In this embodiment, the compensation device for adaptively adjusting the number of excitations and the capacitance value includes:

[0049] The excitation adaptive adjustment module generates an excitation signal with a default excitation count of 10. It calculates the non-magnetic signal strength based on the AD value sampled by the ADC sampling module, obtains the peak value (maximum AD value) and trough value (minimum AD value) of the water meter's rotation, and adjusts the excitation adaptive adjustment module based on the sampled voltage AD value to adaptively adjust the sampled AD value within a qualified range. The primary coil module receives the excitation signal from the excitation adaptive adjustment module and generates an induced current. The secondary coil induction module receives the induced current and discharges it through the discharge control module. The discharge control module discharges the capacitance value adaptive adjustment module to facilitate its operation. The capacitance value adaptive adjustment module is used for... The capacitor value is adjusted based on the AD value sampled by the ADC sampling module when the excitation adaptive adjustment module cannot complete the adjustment, so that the subsequently obtained AD value and the intensity of the non-magnetic signal are within a suitable range. The ADC sampling module is used to sample the AD value of the water meter and return it to the main control module. The main control module is used to control the excitation adaptive adjustment module, the discharge control module, and the capacitor value adaptive adjustment module, and also to receive the water meter AD value sampled by the ADC sampling module. The excitation adaptive adjustment module, the primary coil module, the secondary coil module, the discharge control module, the capacitor value adaptive adjustment module, and the ADC sampling module are connected in sequence for communication. The main control module is also connected in communication with the excitation adaptive adjustment module, the discharge control module, the capacitor value adaptive adjustment module, and the ADC sampling module.

[0050] Furthermore, in this embodiment, the capacitor value adaptive adjustment module includes capacitors C1, C2, and C3, switch K1, and switch K2. Capacitors C1 and C3 are connected in series, and capacitors C3 and C2 are connected in parallel. The two ends of switch K1 are connected to the two ends of capacitor C1, and the two ends of switch K2 are connected to the two ends of capacitor C2.

[0051] Specifically, capacitors C1, C2, and C3 have identical parameters and equal capacitance values; they are all NPO capacitors. Under normal circumstances, capacitor C3 is assumed to be the detector capacitor, which is the capacitance value of the capacitance adaptive adjustment module. In this case, switches K1 and K2 are closed. If the excitation adaptive adjustment module cannot adjust the AD value and the non-magnetic signal strength to a suitable value, it is assumed that the capacitance value has decayed during operation. In this case, switch K1 is closed and switch K2 is open. If switch K1 is closed and switch K2 is open, and the excitation adaptive adjustment module still cannot adjust the AD value and the non-magnetic signal strength to a suitable value, then switch K1 is open and switch K2 is closed.

[0052] This invention also provides a method for non-magnetic adaptive adjustment of excitation and capacitance in IoT water meters, applied to the aforementioned device, in combination with... Figures 1 to 3The method for non-magnetic adaptive adjustment of excitation and capacitance in the IoT water meter includes the following steps:

[0053] S10: The main control module triggers the excitation adaptive adjustment module to generate an excitation signal with a default excitation count of 10. The primary coil module works, and the secondary coil induction module generates an induced current, which is added to the capacitor value adaptive adjustment module. The induced current of the secondary coil is affected by the rotation angle of the disk, thereby affecting the voltage value of the capacitor under the same discharge conditions.

[0054] S20, the ADC sampling module collects the voltage value of the water meter rotating one revolution on the capacitor and converts it into an AD value, which is then transmitted to the main control module;

[0055] S30. The main control module obtains the AD value by comparison, gets the maximum and minimum values ​​of the AD value, and calculates the strength of the non-magnetic signal and the upper limit of the AD value.

[0056] Specifically, the non-magnetic signal strength is the difference between the maximum and minimum AD values. The main control module determines the upper limit of the AD value based on the AD value after the water meter rotates one revolution. The upper limit of the AD value is defined as 80% of the AD value, and the lower limit of the AD value is defined as 20% of the AD value.

[0057] Furthermore, the magnitude of the AD value depends on the resolution of the ADC sampling module. ADC resolution can be divided into 10-bit ADC and 12-bit ADC. The resolution is different and the size of the ADC is different, but the voltage value represented on the capacitor is the same. For example, the ADC sampling module selected in this embodiment is a 12-bit ADC with a reference voltage of 1.5V. The full scale of the AD value is 4096, and the corresponding voltage is 1.5V. The upper limit is 4096*80%=3276, and the lower limit is 4096*20%=819.

[0058] S40. If the intensity of the non-magnetic signal exceeds the upper limit of the AD value, the excitation adaptive adjustment module increases the excitation count by 1. If the excitation adaptive adjustment module increases the count by more than 5, it is considered that there is a fault in the circuit discharge loop and an alarm message is issued. The ADC sampling module continuously collects the AD value of the water meter after one rotation. If the excitation adaptive adjustment module increases the count by less than 5, it returns to step S20 until the AD value does not exceed the upper limit.

[0059] Specifically, increasing the number of excitations is equivalent to increasing the number of discharges. The AD value converted from the capacitor voltage value of the capacitor value adaptive adjustment module will decrease if there is no fault in the circuit discharge loop.

[0060] S50. If the intensity of the non-magnetic signal is lower than the lower limit of the AD value, the excitation adaptive adjustment module reduces the excitation count by 1. If the excitation adaptive adjustment module reduces the count by less than or equal to 5, it is determined whether the intensity of the non-magnetic signal meets the requirements. If it does not meet the requirements, it returns to step S40. If the excitation adaptive adjustment module reduces the count by more than 5, the main control module determines that the capacitance value is low and the excitation adaptive adjustment module cannot adaptively adjust. It controls the activation of the capacitance value adaptive adjustment module, closes switch K1, and opens switch K2.

[0061] S60. The main control module determines whether the number of adjustments by the capacitor value adaptive adjustment module is greater than 1. If so, the main control module determines that switch K1 is closed and switch K2 is open, and it is impossible to adjust so that the AD value and the non-magnetic signal strength are qualified at the same time. Then, it controls the switch K1 of the capacitor value adaptive adjustment module to be open and switch K2 to be closed, and returns to step S10. If not, it directly returns to step S10.

[0062] The above-described embodiment of the IoT water meter non-magnetic adaptive adjustment excitation and capacitance device and method addresses the shortcomings of existing technologies. In the prior art, non-magnetic metering suffers from inherent problems with the non-magnetic module itself or attenuation due to electromechanical conversion, resulting in compromised stability and reliability. This invention features a simple structure and convenient operation. Based on the sampled capacitor voltage value (AD value), it adjusts the excitation count beyond the default count to ensure the sampled voltage value and the non-magnetic signal strength are within a suitable range. When the excitation count of the adaptive adjustment module fails to meet the requirements of the sampled voltage value and the non-magnetic signal strength, the software determines whether the capacitor has attenuated due to long-term operation, resulting in decreased capacitance or leakage / short circuit. It then selects a backup capacitor value adaptive adjustment module to compensate for the capacitor's capacitance value in the circuit before resuming the adaptive adjustment excitation count. This ensures the sampled capacitor voltage value and the non-magnetic signal strength are within a reasonable range, thus resolving various capacitor-related issues caused by production and installation variations, component discreteness, and external operation. This fundamentally solves the reliability engineering problems of non-magnetic operation, eliminating capacitance attenuation and pulse loss issues during long-term operation, thereby ensuring the stability and reliability of non-magnetic metering.

[0063] Obviously, the embodiments described above are merely preferred embodiments of the present invention, and not all embodiments. The accompanying drawings illustrate preferred embodiments of the present invention, but do not limit the scope of the patent. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this invention.

Claims

1. A device for non-magnetic adaptive adjustment of excitation and capacitance in an Internet of Things (IoT) water meter, characterized in that, include: The excitation adaptive adjustment module is used to calculate the intensity of the non-magnetic signal based on the AD value sampled by the ADC sampling module, and to adaptively adjust the sampled AD value within a qualified range. The primary coil module is used to receive the excitation signal from the excitation adaptive adjustment module and generate an induced current; The secondary coil induction module is used to receive the induced current and discharge it through the discharge control module. A discharge control module is used to discharge the capacitor value adaptive adjustment module so that the capacitor value adaptive adjustment module can work. An adaptive capacitance adjustment module is used to adjust the capacitance value based on the AD value sampled by the ADC sampling module when the excitation adaptive adjustment module cannot complete the adjustment. The adaptive capacitance adjustment module includes capacitors C1, C2, and C3, switch K1, and switch K2. Capacitors C1 and C3 are connected in series, and capacitors C3 and C2 are connected in parallel. The two ends of switch K1 are connected to the two ends of capacitor C1, and the two ends of switch K2 are connected to the two ends of capacitor C2. The ADC sampling module is used to sample the AD value of the water meter and return it to the main control module; The main control module is used to control the excitation adaptive adjustment module, the discharge control module, and the capacitor value adaptive adjustment module, and is also used to receive the water meter AD value sampled by the ADC sampling module. The excitation adaptive adjustment module, primary coil module, secondary coil module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module are sequentially connected in communication. The main control module is also connected in communication with the excitation adaptive adjustment module, discharge control module, capacitor value adaptive adjustment module, and ADC sampling module.

2. The device for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter according to claim 1, characterized in that, The capacitors C1, C2, and C3 have the same capacitance value and are all NPO capacitors.

3. A method for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter, characterized in that, Includes the following steps: S10: The main control module triggers the excitation adaptive adjustment module to generate an excitation signal, the primary coil module works, and the secondary coil induction module generates an induced current, which is added to the capacitor value adaptive adjustment module. S20, the ADC sampling module collects the voltage value of the water meter rotating one revolution on the capacitor and converts it into an AD value, which is then transmitted to the main control module; S30. The main control module obtains the AD value by comparison, gets the maximum and minimum values ​​of the AD value, and calculates the strength of the non-magnetic signal and the upper limit of the AD value. S40. If the intensity of the non-magnetic signal exceeds the upper limit of the AD value, the excitation adaptive adjustment module increases the excitation count by 1. If the excitation adaptive adjustment module increases the count by more than 5, it is considered that there is a fault in the circuit discharge loop and an alarm message is issued. If the excitation adaptive adjustment module increases the count by less than 5, it returns to step S20 until the AD value does not exceed the upper limit. S50. If the intensity of the non-magnetic signal is lower than the lower limit of the AD value, the excitation adaptive adjustment module reduces the excitation count by 1. If the excitation adaptive adjustment module reduces the count by less than or equal to 5, it is determined whether the intensity of the non-magnetic signal meets the requirements. If it does not meet the requirements, it returns to step S40. If the excitation adaptive adjustment module reduces the count by more than 5, the main control module controls the capacitor value adaptive adjustment module to be turned on, switch K1 is closed, and switch K2 is opened. S60. The main control module determines whether the number of adjustments by the capacitor value adaptive adjustment module is greater than 1. If yes, the main control module controls the switch K1 of the capacitor value adaptive adjustment module to open and the switch K2 to close, and returns to step S10. If no, it directly returns to step S10.

4. The method for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter according to claim 3, characterized in that, In step S10, the default number of excitation cycles for the excitation adaptive adjustment module is 10.

5. The method for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter according to claim 3, characterized in that, In step S30, the intensity of the non-magnetic signal is the difference between the maximum and minimum values ​​of the AD value, and the upper limit of the AD value is 80% of the AD value.

6. The method for non-magnetic adaptive adjustment of excitation and capacitance in an IoT water meter according to claim 3, characterized in that, In step S60, the activation of the capacitor value adaptive adjustment module once indicates that the adjustment count is 1, and the adjustment count is no more than 2 times.

Images