CN117213573A - Device and method for excitation and capacitance adjustment of non-magnetic self-adaption of Internet of things water meter - Google Patents
Device and method for excitation and capacitance adjustment of non-magnetic self-adaption of Internet of things water meter Download PDFInfo
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Abstract
The invention is applicable to the technical field of non-magnetic electromechanical conversion, and relates to a device and a method for non-magnetic self-adaptive adjustment excitation and capacitance of a water meter of the Internet of things, wherein the device comprises the following steps: the device comprises an excitation self-adaptive adjustment module, a primary coil module, a secondary coil induction module, a discharge control module, a capacitance value self-adaptive adjustment module, an ADC sampling module and a main control module; the main control module is respectively in communication connection with the excitation self-adaptive adjustment module, the capacitance self-adaptive adjustment module and the ADC sampling module. The invention has simple structure and convenient operation, solves the problems of capacitance attenuation and pulse loss of the nonmagnetic metering in the long-term operation process, thereby ensuring the stability and reliability of the nonmagnetic metering.
Description
Technical Field
The invention belongs to the technical field of non-magnetic electromechanical conversion, and particularly relates to a device and a method for non-magnetic self-adaptive adjustment of excitation and capacitance of a water meter of the Internet of things.
Background
Currently, when detecting the flow rate or flow rate of a fluid, such as a liquid or a gas, the fluid pushes a mechanical part to rotate, and the flow rate or flow rate of the liquid or the gas is calculated through the rotation of the mechanical part. Mechanical manifestations include fluid metering techniques including magnetic sensing techniques and non-magnetic metering techniques. The main fluid metering mode is magnetic metering, the permanent magnet of the device is in a rotating position, and when the magnetic sensor passes near the magnet, the magnet is driven to act, but the device is easily interfered by external magnetism, so that metering errors are caused. The non-magnetic metering can be realized without magnet triggering, has higher stability and precision, truly realizes the drip metering, can early warn according to the water habit of the solitary old people, solves the safety problem of the solitary old people, has stronger anti-strong magnetic interference capability and has slowly replaced the magnetic metering.
Although the nonmagnetic metering brings a breakthrough in technology to water metering, the nonmagnetic metering has the defects that the distance between a signaling position of a nonmagnetic module and a semi-metal disc is changed due to randomness in the assembly process, so that consistency is poor, the distance is slightly increased, pulse loss occurs, the nonmagnetic metering is basically realized by voltage detection in the market, the voltage detection industry basically relies on charge and discharge of an NPO capacitor, the water meter needs to be charged and discharged for about 25 hundred million to 157 hundred million times in one rotation period to realize electromechanical conversion, under the high-frequency charge and discharge background, the capacitor is slowly changed along with the time and the change of external temperature and humidity, the capacitance is attenuated to a certain extent, the conditions of serious leakage, short circuit, reduced capacitance and the like of the capacitor occur according to the attenuation condition, the problems directly cause nonmagnetic metering loss or nonmagnetic metering loss function occur, and the stability and reliability of nonmagnetic metering cannot be ensured. The patent with the publication number of CN111238584B provides an anti-interference circuit of a non-magnetic metering sensor, which comprises a four-core twisted pair shielding wire, a first capacitor and a second capacitor; the four-core twisted pair shielding wire is connected between the NB water vapor meter transmission module and the nonmagnetic metering sensor and comprises a VDD wire, a GND wire, a positive pulse wire and a negative pulse wire, wherein the VDD wire and the positive pulse wire are twisted in pairs, the GND wire and the negative pulse wire are twisted in pairs, the outer layer of the four-core twisted pair shielding wire is a metal shielding layer, and the four-core twisted pair shielding wire is connected with the ground of the nonmagnetic metering sensor; the first capacitor and the second capacitor are respectively connected between the positive pulse line and the GND line. The patent eliminates the harmful waveforms induced on the positive and negative pulse signal lines, thereby ensuring the accuracy of non-magnetic measurement, but the related technical proposal is not given for the problems of pulse loss and capacitance value attenuation existing in the prior art.
Therefore, how to solve the problems of capacitance attenuation and pulse loss existing in the non-magnetic metering process in the long-term operation process, so as to ensure the stability and reliability of the non-magnetic metering is an important point of urgent research by those skilled in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a device for non-magnetic self-adaptive adjustment excitation and capacitance of a water meter of the Internet of things, which is used for solving the problems of low stability and reliability of non-magnetic measurement caused by capacitance value attenuation and pulse loss in the long-term operation process of non-magnetic measurement in the prior art; in addition, the invention also provides a method for non-magnetic self-adaptive adjustment of excitation and capacitance of the water meter of the Internet of things.
In order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a device for non-magnetic adaptive adjustment of excitation and capacitance of an internet of things water meter, comprising:
the excitation self-adaptive adjustment module is used for calculating the strength of the nonmagnetic signal according to the AD value sampled by the ADC sampling module and self-adaptively adjusting the sampled AD value within a qualified range;
the primary coil module is used for receiving the excitation signal of the excitation adaptive adjustment module and generating induction current;
the secondary coil induction module is used for receiving the induction current and discharging through the discharge control module;
the discharging control module is used for discharging the capacitance value self-adaptive module so as to facilitate the work of the capacitance value self-adaptive adjustment module;
the capacitance-capacitance self-adaptive adjustment module is used for adjusting the capacitance value according to the AD value sampled by the ADC sampling module under the condition that the excitation self-adaptive adjustment module cannot finish adjustment;
the ADC sampling module is used for sampling the AD value of the water meter and returning the AD value to the main control module;
the main control module is used for controlling the excitation self-adaptive adjustment module, the discharge control module and the capacitance self-adaptive adjustment module and also used for receiving the AD value of the water meter sampled by the ADC sampling module;
the main control module is respectively in communication connection with the excitation self-adaptive adjustment module, the discharge control module, the capacitance capacity self-adaptive adjustment module and the ADC sampling module.
Further, the capacitance value self-adaptive adjustment module comprises a capacitor C1, a capacitor C2, a capacitor C3, a switch K1 and a switch K2, wherein the capacitor C1 is connected in series with the capacitor C3, the capacitor C3 is connected in parallel with the capacitor C2, two ends of the switch K1 are respectively connected with two ends of the capacitor C1, and two ends of the switch K2 are respectively connected with two ends of the capacitor C2.
Further, the capacitance values of the capacitor C1, the capacitor C2 and the capacitor C3 are equal, and are NPO capacitors.
In a second aspect, the invention also provides a method for non-magnetic self-adaptive adjustment of excitation and capacitance of the water meter of the Internet of things, which comprises the following steps:
s10, the main control module triggers the excitation self-adaptive adjustment module to generate an excitation signal, the primary coil module works, the secondary coil induction module generates induction current, and the induction current is added to the capacitance self-adaptive adjustment module;
s20, the ADC sampling module collects the voltage value of the water meter on the capacitor, which rotates for one circle, and converts the voltage value into an AD value to be transmitted to the main control module;
s30, comparing the AD values obtained by the main control module to obtain a maximum value and a minimum value of the AD values, and calculating the non-magnetic signal intensity and the upper limit of the AD values;
s40, if the strength of the nonmagnetic signal exceeds the upper limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is increased by 1, and if the increase frequency of the excitation self-adaptive adjustment module is greater than 5, the circuit discharge loop is considered to have faults, and alarm information is prompted; if the number of times of increasing the excitation adaptive adjustment module is not more than 5, returning to the step S20 until the AD value is not more than the upper limit;
s50, if the strength of the nonmagnetic signal is lower than the lower limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is reduced by 1, if the reduction frequency of the excitation self-adaptive adjustment module is less than or equal to 5, whether the strength of the nonmagnetic signal meets the requirement is judged, and if the strength of the nonmagnetic signal does not meet the requirement, the step S40 is returned; if the reduction times of the excitation self-adaptive adjustment module is more than 5, the main control module controls the starting of the capacitance self-adaptive adjustment module, the switch K1 is closed, and the switch K2 is opened;
and S60, the main control module judges whether the adjustment times of the capacitance value self-adaptive adjustment module are greater than 1, if yes, the main control module controls the switch K1 of the capacitance value self-adaptive adjustment module to be opened and the switch K2 to be closed, and returns to the step S10, and if not, the main control module directly returns to the step S10.
Further, in step S10, the number of activations of the default activation adaptive adjustment module is 10.
Further, in the step S30, the non-magnetic signal strength is a difference between a maximum value and a minimum value of the AD value, and the upper limit of the AD value is 80% of the AD value.
Further, in step S60, the capacitance adaptive adjustment module is started 1 time to indicate that the adjustment frequency is 1, and the adjustment frequency is not more than 2 times.
Compared with the prior art, the device and the method for the non-magnetic self-adaptive adjustment of the excitation and the capacitance of the water meter of the internet of things have at least the following beneficial effects:
in the prior art, the stability and reliability of the nonmagnetic metering cannot be ensured due to the problem of the nonmagnetic module or the attenuation of the electromechanical conversion. The invention has simple structure and convenient operation, the excitation times are adjusted on the basis of the default excitation times according to the sampled capacitance voltage value (AD value), so that the sampled voltage value and the non-magnetic signal intensity are in a proper range, when the excitation times of the excitation self-adaptive adjustment module cannot meet the requirements of the sampled voltage value and the non-magnetic signal intensity, software judges and determines whether the capacitance is attenuated due to long-term operation, the capacitance is reduced or the capacitance is in leakage short circuit, the self-adaptive adjustment module for the capacitance of the backup capacitance is gated, the capacitance of the capacitance is compensated on the circuit, and then the self-adaptive adjustment excitation times are started, so that the sampled capacitance voltage value and the non-magnetic signal intensity are in a reasonable range, thereby solving various problems of the capacitance caused by the production installation of non-magnetic devices or the discrete operation of the devices, fundamentally solving the reliability engineering problem of the non-magnetic operation, and avoiding the problems of capacitance attenuation and pulse loss of the non-magnetic metering in the long-term operation process, thereby ensuring the stability and reliability of the non-magnetic metering.
Drawings
In order to more clearly illustrate the solution of the invention, a brief description will be given below of the drawings required for the description of the embodiments, it being apparent that the drawings in the following description are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a device for non-magnetic self-adaptive adjustment of excitation and capacitance of an internet of things water meter according to an embodiment of the present invention;
fig. 2 is a partial circuit diagram of a capacitance value adaptive adjustment module of a device for non-magnetic adaptive adjustment excitation and capacitance of an internet of things water meter according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for non-magnetic self-adaptive adjustment of excitation and capacitance of an internet of things water meter according to an embodiment of the invention.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terms used in the specification are used herein for the purpose of describing particular embodiments only and are not intended to limit the present invention, for example, the orientations or positions indicated by the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientations or positions based on the drawings, which are merely for convenience of description and are not to be construed as limiting the present invention.
The terms "comprising" and "having" and any variations thereof in the description of the invention and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion; the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. In the description of the invention and the claims and the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
Furthermore, references herein to "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention provides a device for non-magnetic self-adaptive adjustment excitation and capacitance of an internet of things water meter, which is applied to the non-magnetic metering process of the internet of things water meter, and comprises the following components:
the excitation self-adaptive adjustment module is used for calculating the strength of the nonmagnetic signal according to the AD value sampled by the ADC sampling module and self-adaptively adjusting the sampled AD value within a qualified range;
the primary coil module is used for receiving the excitation signal of the excitation adaptive adjustment module and generating induction current;
the secondary coil induction module is used for receiving the induction current and discharging through the discharge control module;
the discharging control module is used for discharging the capacitance value self-adaptive module so as to facilitate the work of the capacitance value self-adaptive adjustment module;
the capacitance-capacitance self-adaptive adjustment module is used for adjusting the capacitance value according to the AD value sampled by the ADC sampling module under the condition that the excitation self-adaptive adjustment module cannot finish adjustment;
the ADC sampling module is used for sampling the AD value of the water meter and returning the AD value to the main control module;
the main control module is used for controlling the excitation self-adaptive adjustment module, the discharge control module and the capacitance self-adaptive adjustment module and also used for receiving the AD value of the water meter sampled by the ADC sampling module;
the main control module is respectively in communication connection with the excitation self-adaptive adjustment module, the discharge control module, the capacitance capacity self-adaptive adjustment module and the ADC sampling module.
The invention has simple structure and convenient operation, solves the problems of capacitance attenuation and pulse loss of the nonmagnetic metering in the long-term operation process, thereby ensuring the stability and reliability of the nonmagnetic metering.
In order to make the person skilled in the art better understand the solution of the present invention, the technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The invention provides a method for exciting and capacitance of a water meter of the Internet of things in a non-magnetic self-adaptive adjustment mode, which is applied to the non-magnetic metering process of the water meter of the Internet of things, and is different from the prior art, the invention adds an exciting self-use adjustment module and a capacitance value self-adaptive adjustment module, the exciting self-adaptive adjustment module calculates non-magnetic signal intensity according to an AD value returned to a main control module by an ADC sampling module, and the sampled AD value self-adaptive adjustment is in a qualified range, the capacitance value self-adaptive adjustment module gates a capacitor by a switch control method, thereby realizing the purpose of changing capacitance value, the common capacitor is a default value, the capacitance value self-adaptive adjustment module is triggered under the condition that the non-magnetic signal intensity and the sampled AD value still cannot be in the qualified range only after the exciting self-adaptive adjustment module is repeatedly adjusted, and the capacitance value self-adaptive adjustment module is changed from hardware, and in combination with fig. 1 and 2, the compensation device for the self-adaptive adjustment exciting times and the capacitance value comprises:
the excitation self-adaptive adjustment module generates excitation signals for 10 times according to default excitation times, is used for calculating the non-magnetic signal intensity according to the AD value sampled by the ADC sampling module, obtaining the peak value (AD maximum value) and the trough value (AD minimum value) of the water meter rotating for one circle, calculating the non-magnetic signal intensity, and adjusting the excitation self-adaptive adjustment module according to the voltage AD value sampled by the non-magnetic signal intensity so as to self-adaptively adjust the sampled AD value within a qualified range; the primary coil module is used for receiving an excitation signal of the excitation adaptive adjustment module and generating an induction current; the secondary coil induction module is used for receiving the induction current and discharging through the discharge control module; the discharging control module is used for discharging the capacitance value self-adaptive module so as to facilitate the work of the capacitance value self-adaptive adjustment module; the capacitance value self-adaptive adjustment module is used for adjusting the capacitance value according to the AD value sampled by the ADC sampling module under the condition that the excitation self-adaptive adjustment module cannot finish adjustment, so that the AD value and the nonmagnetic signal intensity obtained later are in a proper range; the ADC sampling module is used for sampling the AD value of the water meter and returning the AD value to the main control module; the main control module is used for controlling the excitation self-adaptive adjustment module, the discharge control module, the capacitance self-adaptive adjustment module and the water meter AD value sampled by the ADC sampling module; the main control module is respectively in communication connection with the excitation self-adaptive adjustment module, the discharge control module, the capacitance capacity self-adaptive adjustment module and the ADC sampling module.
Further, in this embodiment, the capacitance value adaptive adjustment module includes a capacitor C1, a capacitor C2, a capacitor C3, a switch K1 and a switch K2, where the capacitor C1 is connected in series with the capacitor C3, the capacitor C3 is connected in parallel with the capacitor C2, two ends of the switch K1 are connected with two ends of the capacitor C1 respectively, and two ends of the switch K2 are connected with two ends of the capacitor C2 respectively.
Specifically, the parameters of the capacitor C1, the capacitor C2 and the capacitor C3 are consistent, the capacitance values are equal, the capacitor C1 and the capacitor C3 are NPO capacitors, the default capacitor C3 is a detection capacitor under normal conditions, and the capacitor C3 is a capacitance value of a capacitor capacitance value self-adaptive adjustment module, and at the moment, the switch K1 and the switch K2 are closed; if the excitation self-adaptive adjustment module cannot adjust the AD value and the nonmagnetic signal strength to proper values, the capacitance is considered to be attenuated in the running process of the capacitor, and at the moment, the switch K1 is closed and the switch K2 is opened; if the switch K1 is closed and the switch K2 is opened, the excitation adaptive adjustment module still cannot adjust the AD value and the nonmagnetic signal strength to appropriate values, and at this time, the switch K1 is opened and the switch K2 is closed.
The embodiment of the invention also provides a method for the non-magnetic self-adaptive adjustment of the excitation and the capacitance of the water meter of the Internet of things, which is applied to the device and is combined with figures 1 to 3, and comprises the following steps:
s10, the main control module triggers the excitation self-adaptive adjustment module, excitation signals are generated by taking default excitation times as 10 times, the primary coil module works, the secondary coil induction module generates induction current, the induction current is added on the capacitance value self-adaptive adjustment module, and the induction current of the secondary coil is influenced according to the rotation angle of the disc, so that the voltage value of the capacitor under the same discharging condition is influenced;
s20, the ADC sampling module collects the voltage value of the water meter on the capacitor, which rotates for one circle, and converts the voltage value into an AD value to be transmitted to the main control module;
s30, comparing the AD values obtained by the main control module to obtain a maximum value and a minimum value of the AD values, and calculating the non-magnetic signal intensity and the upper limit of the AD values;
specifically, the non-magnetic signal strength is the difference between the AD maximum value and the AD minimum value, the main control module judges the upper line of the AD value according to the AD value of the water meter rotating for one circle, 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.
Further, the size of the AD value depends on the resolution of the ADC sampling module, where the resolution of the ADC may be divided into a 10-bit ADC and a 12-bit ADC, where the resolutions are different, but the voltages on the representative capacitors are identical, for example, the ADC sampling module selected in this embodiment is a 12-bit ADC, the reference voltage is 1.5V, the full scale of the AD value is 4096, the corresponding voltage is 1.5V, the upper limit is 4096×80% =3276, and the lower limit is 4096×20% =819.
S40, if the strength of the nonmagnetic signal exceeds the upper limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is increased by 1, and if the increase frequency of the excitation self-adaptive adjustment module is greater than 5, the circuit discharge loop is considered to have faults, and alarm information is prompted; the ADC sampling module continuously collects the AD value of the water meter rotating for one circle, and if the number of times of exciting the self-adaptive adjustment module is not more than 5, the step S20 is returned until the AD value is not more than the upper limit;
specifically, increasing the excitation frequency corresponds to increasing the discharge frequency, and the AD value of the capacitor voltage value converted by the capacitor capacitance value self-adaptive adjustment module is reduced under the condition that the circuit discharge loop is not faulty.
S50, if the strength of the nonmagnetic signal is lower than the lower limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is reduced by 1, if the reduction frequency of the excitation self-adaptive adjustment module is less than or equal to 5, whether the strength of the nonmagnetic signal meets the requirement is judged, and if the strength of the nonmagnetic signal does not meet the requirement, the step S40 is returned; if the reduction times of the excitation adaptive adjustment module are more than 5, the main control module judges that the capacitance value of the capacitor is low, the excitation adaptive adjustment module cannot be adjusted in an adaptive mode, the excitation adaptive adjustment module is controlled to be started, the switch K1 is closed, and the switch K2 is opened;
and S60, the main control module judges whether the adjustment times of the capacitance value self-adaptive adjustment module are greater than 1, if yes, the main control module judges that the switch K1 is closed and the switch K2 is opened, the AD value and the non-magnetic signal strength cannot be adjusted to be qualified at the same time, the switch K1 of the capacitance value self-adaptive adjustment module is controlled to be opened and the switch K2 is controlled to be closed, the step S10 is returned, and if not, the step S10 is directly returned.
Compared with the prior art, the device and the method for the excitation and capacitance adjustment of the internet of things water meter in a non-magnetic self-adaptive manner in the embodiment have the advantage that the stability and the reliability of the non-magnetic metering cannot be ensured due to the problem of a non-magnetic module or the attenuation of electromechanical conversion in the prior art. The invention has simple structure and convenient operation, the excitation times are adjusted on the basis of the default excitation times according to the sampled capacitance voltage value (AD value), so that the sampled voltage value and the non-magnetic signal intensity are in a proper range, when the excitation times of the excitation self-adaptive adjustment module cannot meet the requirements of the sampled voltage value and the non-magnetic signal intensity, software judges and determines whether the capacitance is attenuated due to long-term operation, the capacitance is reduced or the capacitance is in leakage short circuit, the self-adaptive adjustment module for the capacitance of the backup capacitance is gated, the capacitance of the capacitance is compensated on the circuit, and then the self-adaptive adjustment excitation times are started, so that the sampled capacitance voltage value and the non-magnetic signal intensity are in a reasonable range, thereby solving various problems of the capacitance caused by the production installation of non-magnetic devices or the discrete operation of the devices, fundamentally solving the reliability engineering problem of the non-magnetic operation, and avoiding the problems of capacitance attenuation and pulse loss of the non-magnetic metering in the long-term operation process, thereby ensuring the stability and reliability of the non-magnetic metering.
It is apparent that the above-described embodiments are merely preferred embodiments of the present invention, not all of which are shown in the drawings, which do not limit the scope of the invention. This invention may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the invention are directly or indirectly applied to other related technical fields, and are also within the scope of the invention.
Claims (7)
1. The utility model provides a device of no magnetism self-adaptation adjustment excitation of thing networking water gauge and electric capacity which characterized in that includes:
the excitation self-adaptive adjustment module is used for calculating the strength of the nonmagnetic signal according to the AD value sampled by the ADC sampling module and self-adaptively adjusting the sampled AD value within a qualified range;
the primary coil module is used for receiving the excitation signal of the excitation adaptive adjustment module and generating induction current;
the secondary coil induction module is used for receiving the induction current and discharging through the discharge control module;
the discharging control module is used for discharging the capacitance value self-adaptive module so as to facilitate the work of the capacitance value self-adaptive adjustment module;
the capacitance-capacitance self-adaptive adjustment module is used for adjusting the capacitance value according to the AD value sampled by the ADC sampling module under the condition that the excitation self-adaptive adjustment module cannot finish adjustment;
the ADC sampling module is used for sampling the AD value of the water meter and returning the AD value to the main control module;
the main control module is used for controlling the excitation self-adaptive adjustment module, the discharge control module and the capacitance self-adaptive adjustment module and also used for receiving the AD value of the water meter sampled by the ADC sampling module;
the main control module is respectively in communication connection with the excitation self-adaptive adjustment module, the discharge control module, the capacitance capacity self-adaptive adjustment module and the ADC sampling module.
2. The device for exciting and capacitance adjustment of the internet of things water meter according to claim 1, wherein the capacitance value self-adaptive adjustment module comprises a capacitor C1, a capacitor C2, a capacitor C3, a switch K1 and a switch K2, wherein the capacitor C1 is connected in series with the capacitor C3, the capacitor C3 is connected in parallel with the capacitor C2, two ends of the switch K1 are respectively connected with two ends of the capacitor C1, and two ends of the switch K2 are respectively connected with two ends of the capacitor C2.
3. The device for non-magnetic self-adaptive excitation and capacitance adjustment of the water meter of the internet of things according to claim 2, wherein the capacitance values of the capacitor C1, the capacitor C2 and the capacitor C3 are equal, and are NPO capacitors.
4. The method for exciting and capacitance non-magnetic self-adaptive adjustment of the water meter of the Internet of things is characterized by comprising the following steps of:
s10, the main control module triggers the excitation self-adaptive adjustment module to generate an excitation signal, the primary coil module works, the secondary coil induction module generates induction current, and the induction current is added to the capacitance self-adaptive adjustment module;
s20, the ADC sampling module collects the voltage value of the water meter on the capacitor, which rotates for one circle, and converts the voltage value into an AD value to be transmitted to the main control module;
s30, comparing the AD values obtained by the main control module to obtain a maximum value and a minimum value of the AD values, and calculating the non-magnetic signal intensity and the upper limit of the AD values;
s40, if the strength of the nonmagnetic signal exceeds the upper limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is increased by 1, and if the increase frequency of the excitation self-adaptive adjustment module is greater than 5, the circuit discharge loop is considered to have faults, and alarm information is prompted; if the number of times of increasing the excitation adaptive adjustment module is not more than 5, returning to the step S20 until the AD value is not more than the upper limit;
s50, if the strength of the nonmagnetic signal is lower than the lower limit of the AD value, the excitation frequency of the excitation self-adaptive adjustment module is reduced by 1, if the reduction frequency of the excitation self-adaptive adjustment module is less than or equal to 5, whether the strength of the nonmagnetic signal meets the requirement is judged, and if the strength of the nonmagnetic signal does not meet the requirement, the step S40 is returned; if the reduction times of the excitation self-adaptive adjustment module is more than 5, the main control module controls the starting of the capacitance self-adaptive adjustment module, the switch K1 is closed, and the switch K2 is opened;
and S60, the main control module judges whether the adjustment times of the capacitance value self-adaptive adjustment module are greater than 1, if yes, the main control module controls the switch K1 of the capacitance value self-adaptive adjustment module to be opened and the switch K2 to be closed, and returns to the step S10, and if not, the main control module directly returns to the step S10.
5. The method for non-magnetic adaptive excitation and capacitance adjustment of an internet of things water meter according to claim 4, wherein in step S10, the number of excitation times of the default excitation adaptive adjustment module is 10.
6. The method for non-magnetic adaptive excitation and capacitance adjustment of an internet of things water meter according to claim 4, wherein in the step S30, the non-magnetic signal strength is a difference between a maximum value and a minimum value of the AD value, and the upper limit of the AD value is 80% of the AD value.
7. The method for non-magnetic adaptive adjustment of excitation and capacitance of an internet of things water meter according to claim 4, wherein in the step S60, the capacitance value adaptive adjustment module is started 1 time to indicate that the adjustment frequency is 1, and the adjustment frequency is not more than 2 times.
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| CN202311139324.9A CN117213573A (en) | 2023-09-05 | 2023-09-05 | Device and method for excitation and capacitance adjustment of non-magnetic self-adaption of Internet of things water meter |
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| CN202311139324.9A CN117213573A (en) | 2023-09-05 | 2023-09-05 | Device and method for excitation and capacitance adjustment of non-magnetic self-adaption of Internet of things water meter |
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| CN117213573A true CN117213573A (en) | 2023-12-12 |
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| CN202311139324.9A Pending CN117213573A (en) | 2023-09-05 | 2023-09-05 | Device and method for excitation and capacitance adjustment of non-magnetic self-adaption of Internet of things water meter |
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| CN (1) | CN117213573A (en) |
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