Non-magnetic water meter and reading correction method thereof

Abstract

The invention discloses a non-magnetic water meter and a reading correction method thereof, belongs to the technical field of non-magnetic water meters, and can analyze water flow data information of the non-magnetic water meter and state data information of a mechanical water meter in the non-magnetic water meter in a collection period so as to obtain a mechanical water meter actual estimated reading of the mechanical water meter. Carrying out difference processing on the obtained actual pre-estimated reading of the mechanical water meter and the electronic reading of the non-magnetic water meter, then carrying out absolute value processing to obtain an absolute value of a reading difference value, and if the obtained absolute value of the reading difference value is within a preset difference value threshold value, adjusting the reading of the mechanical water meter and the electronic reading to the actual pre-estimated reading; if the absolute value of the obtained reading difference value exceeds the difference value threshold value, the reading of the mechanical water meter is adjusted, so that the reading of the mechanical water meter is made to be the same as the electronic reading, water flow passing through the non-magnetic water meter is accurately metered, and the problem of inaccurate metering caused by electromechanical asynchronism of the water meter is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-magnetic water meters, and particularly relates to a non-magnetic water meter and a method for correcting its reading. Background Technique

[0002] The non-magnetic water meter uses a signal acquisition and detection technology with a non-magnetic sensing and sampling circuit board arranged on the stainless steel sheet of the water meter, and an external coil and four internal small coils are arranged on the sampling circuit board. The external coil generates magnetic flux, and the internal small coils sense and receive magnetic flux. Each of these four small coils has a corresponding magnetic flux (ideally, their magnetic fluxes should be the same). When the stainless steel sheet rotates with the water flow, the steel sheet will pass through these four small coils in turn. Since the steel sheet has the effect of absorbing the magnetic field, the magnetic fluxes of these four small coils will change in turn, becoming a periodic change. The single-chip microcomputer continuously samples these four small coils and performs logical processing to obtain the corresponding pulse period change, thereby realizing the timely acquisition and collection of the water meter measurement data. The non-magnetic technology is a new technology for intelligent water meters to gain credibility, achieving a leap from magnetic-sensitive elements (reed switches, Hall elements, Weigand elements, magnetoresistors, etc.) to non-magnetic elements, greatly improving the anti-interference ability of the water meter.

[0003] Due to the randomness of water meter use and the widespread dripping and leakage behavior, the non-magnetic measurement principle is based on the electronic processing of tiny signals. When the water meter operates at a long-term tiny flow rate and an instantaneous overload flow rate, due to the processing ability of the circuit and the overlapping distortion of the periodic change signals, it cannot accurately measure the water consumption. At the same time, the mechanical measurement part of the non-magnetic water meter will also be affected by water quality, water pressure, and water temperature, resulting in measurement deviation, thus causing the water meter to be out of sync between the mechanical and electrical parts. According to the long-term operation data tracking and analysis of the non-magnetic water meter: the problem of mechanical and electrical inconsistency is relatively prominent. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a non-magnetic water meter and a method for correcting its reading, which solve the above problems.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A method for correcting the reading of a non-magnetic water meter includes the following steps:

[0006] Obtain the water flow data information of the non-magnetic water meter and the status data information of the mechanical water meter in a collection period. The water flow information includes water temperature information, water quality particle information, and water pressure information. The status data information of the mechanical water meter includes rotational resistance information and vibration information;

[0007] Establish a water flow influence model, import the water temperature fluctuation value, water quality particle fluctuation value, and water pressure fluctuation value formed based on the water flow data information into the water flow model, and obtain the water flow influence coefficient;

[0008] Establish a mechanical water meter status model, import the mechanical water meter status data information into the mechanical water meter status model, and obtain the mechanical water meter status coefficient;

[0009] Establish a mechanical water meter reading deviation model. If the water flow influence coefficient and the mechanical water meter status coefficient are normal within a collection period, modify the electronic reading of the non-magnetic water meter to the mechanical water meter reading. If at least one of the water flow influence coefficient or the mechanical water meter status coefficient is abnormal within a collection period, import the water flow influence coefficient obtained from the water flow influence model and the mechanical water meter status coefficient obtained from the mechanical water meter status model into the reading deviation model to obtain the mechanical water meter reading deviation coefficient;

[0010] Substitute the obtained mechanical water meter reading deviation coefficient into the pre-set reading determination model to obtain the actual estimated reading of the mechanical water meter. After performing a difference process on the obtained actual estimated reading of the mechanical water meter and the electronic reading of the non-magnetic water meter and then taking the absolute value to obtain the absolute value of the reading difference. If the obtained absolute value of the reading difference is within the pre-set difference threshold, adjust the mechanical water meter reading and the electronic reading to the actual estimated reading. If the obtained absolute value of the reading difference exceeds the difference threshold, adjust the mechanical water meter reading to make the mechanical water meter reading the same as the electronic reading.

[0011] Based on the above technical solutions, the present invention also provides the following alternative technical solutions:

[0012] Further technical solution: The method for determining whether the water flow influence coefficient and the mechanical water meter status coefficient are abnormal within a collection period is as follows: Compare the water flow influence coefficient and the mechanical water meter status coefficient with the corresponding water flow influence coefficient threshold and mechanical water meter status coefficient threshold. If both are within the corresponding thresholds, it indicates that the water flow influence coefficient and the mechanical water meter status coefficient are normal. If both are not within the corresponding thresholds, it indicates that the water flow influence coefficient and the mechanical water meter status coefficient are abnormal.

[0013] Further technical solution: The method for obtaining the water temperature fluctuation value is as follows: Establish a relationship curve graph of water temperature and time within a collection period, and obtain its maximum slope within a collection period as the water temperature fluctuation value. The methods for obtaining the water quality particle fluctuation value and the water pressure fluctuation value are the same as the method for obtaining the water temperature fluctuation value.

[0014] Further technical solution: Import the water temperature fluctuation value, water quality particle fluctuation value, and water pressure fluctuation value within a collection period into the water flow model to obtain the water flow influence coefficient. The water flow model is expressed as:

[0015]

[0016] Among them, SL(T, K, P) represents the water flow coefficient, T represents the water temperature fluctuation value, K represents the water quality particle fluctuation value, P represents the water pressure fluctuation value, α represents the influence factor of the water temperature fluctuation value on the reading deviation of the standard mechanical water meter, β represents the influence factor of the water quality particle fluctuation value on the reading deviation of the standard mechanical water meter, and γ represents the influence factor of the water pressure fluctuation value on the reading deviation of the standard mechanical water meter.

[0017] Further technical solution: Import the mechanical water meter rotation resistance information and vibration information within one acquisition period into the mechanical water meter state model to obtain the mechanical water meter state coefficient. Among them, the mechanical water meter state model is expressed as:

[0018]

[0019] Among them, SB(F, f) represents the mechanical water meter state coefficient, F represents the mechanical water meter rotation resistance information, F represents the vibration information, and δ, μ represent the weights of the corresponding rotation resistance information and vibration information.

[0020] Further technical solution: The mechanical water meter reading deviation model is expressed as:

[0021]

[0022] Among them, DB(SL(T, K, P), SB(F, f)) represents the mechanical water meter reading deviation coefficient, SL(T, K, P) represents the water flow coefficient, SB(F, f) represents the mechanical water meter state coefficient, R represents the value after dimensionlessization of the water meter connection pipe radius, and σ, ω represent the weight coefficients of the corresponding mechanical water meter reading deviation coefficient and water flow coefficient.

[0023] Further technical solution: The reading determination model is expressed as:

[0024] DQ = DN(1 + DB(SL(T, K, P), SB(F, f)))

[0025] Among them, DQ represents the actual estimated reading of the mechanical water meter, DN represents the existing reading of the mechanical water meter, and DB(SL(T, K, P), SB(F, f)) represents the mechanical water meter reading deviation coefficient.

[0026] Further technical solution: The one acquisition period is the reading acquisition period of the non-magnetic water meter using the camera direct reading technology.

[0027] A non-magnetic water meter adopts the above-mentioned non-magnetic water meter reading correction method, and includes a non-magnetic water meter body, a water meter movement, an electromagnetic reading device, and a camera direct reading device for reading the water meter movement. The water meter movement is embedded and installed in the non-magnetic water meter body. It further includes an adjustment mechanism for adjusting the reading of the water meter movement. The adjustment mechanism includes a micro motor and an electromagnetic telescopic rod. The micro motor is embedded and installed in the non-magnetic water meter body. One end of the electromagnetic telescopic rod is fixedly connected to the output shaft of the micro motor, and the free end of the electric telescopic rod is slidably matched with a limiting groove opened on the impeller shaft of the water meter movement.

[0028] The present invention provides a non-magnetic water meter and its reading correction method, which have the following beneficial effects compared with the prior art:

[0029] 1. The present invention can analyze the water flow data information of the non-magnetic water meter and the state data information of the mechanical water meter in the non-magnetic water meter within a collection period, so as to obtain the actual estimated reading of the mechanical water meter. After performing difference processing on the obtained actual estimated reading of the mechanical water meter and the electronic reading of the non-magnetic water meter and then performing absolute value processing, the absolute value of the reading difference is obtained. If the obtained absolute value of the reading difference is within the preset difference threshold, the reading of the mechanical water meter and the electronic reading are adjusted to the actual estimated reading. If the obtained absolute value of the reading difference exceeds the difference threshold, the reading of the mechanical water meter is adjusted to make the reading of the mechanical water meter the same as the electronic reading, so as to achieve accurate measurement of the water flow passing through the non-magnetic water meter and solve the problem of inaccurate measurement caused by the asynchronous operation of the water meter's mechanical and electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flowchart of the non-magnetic water meter reading correction method.

[0031] Figure 2 It is a schematic structural diagram of the non-magnetic water meter of the present invention.

[0032] Figure 3 For the present invention Figure 2 The enlarged schematic diagram of the structure of part A in it.

[0033] Annotation of reference numerals: 1. Non-magnetic water meter body; 2. Water meter movement; 201. Impeller shaft; 202. Limiting groove; 3. Adjustment device; 301. Micro motor; 302. Electric telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0036] Please refer to Figures 1 to 3 , for an embodiment of the present invention, a method for correcting the reading of a non-magnetic water meter, comprising the following steps:

[0037] Obtain the water flow data information of the non-magnetic water meter and the status data information of the mechanical water meter in a collection period. The water flow information includes water temperature information, water quality particulate matter information, and water pressure information. The status data information of the mechanical water meter includes rotational resistance information and vibration information;

[0038] Establish a water flow influence model, import the water temperature fluctuation value, water quality particle fluctuation value, and water pressure fluctuation value formed based on the water flow data information into the water flow model, and obtain the water flow influence coefficient;

[0039] Establish a mechanical water meter status model, and import the mechanical water meter status data information into the mechanical water meter status model to obtain the mechanical water meter status coefficient;

[0040] Establish a mechanical water meter reading deviation model. If the water flow influence coefficient and the mechanical water meter status coefficient are normal in a collection period, modify the electronic reading of the non-magnetic water meter to the reading of the mechanical water meter. If at least one of the water flow influence coefficient or the mechanical water meter status coefficient is abnormal in a collection period, import the water flow influence coefficient obtained from the water flow influence model and the mechanical water meter status coefficient obtained from the mechanical water meter status model into the reading deviation model to obtain the mechanical water meter reading deviation coefficient;

[0041] Preferably, the method for determining whether the water flow influence coefficient and the mechanical water meter status coefficient are abnormal in a collection period is: compare the water flow influence coefficient and the mechanical water meter status coefficient with the corresponding water flow influence coefficient threshold and mechanical water meter status coefficient threshold. If both are within the corresponding thresholds, it indicates that the water flow influence coefficient and the mechanical water meter status coefficient are normal. If both are not within the corresponding thresholds, it indicates that the water flow influence coefficient and the mechanical water meter status coefficient are abnormal.

[0042] Substitute the obtained mechanical water meter reading deviation coefficient into the pre-set reading determination model to obtain the actual estimated reading of the mechanical water meter. After performing difference processing and then absolute value processing on the difference between the obtained actual estimated reading of the mechanical water meter and the electronic reading of the non-magnetic water meter to obtain the absolute value of the reading difference, if the obtained absolute value of the reading difference is within the pre-set difference threshold, adjust the mechanical water meter reading and the electronic reading to the actual estimated reading. If the obtained absolute value of the reading difference exceeds the difference threshold, adjust the mechanical water meter reading to make the mechanical water meter reading the same as the electronic reading.

[0043] Preferably, the one acquisition period is the reading acquisition period of a non-magnetic water meter adopting the camera direct reading technology.

[0044] The way to obtain the water temperature fluctuation value is as follows: establish a relationship curve graph between the water temperature and time within one acquisition period, and obtain the maximum slope within one acquisition period as the water temperature fluctuation value;

[0045] The ways to obtain the water quality particle fluctuation value and the water pressure fluctuation value are the same as the way to obtain the water temperature fluctuation value.

[0046] Preferably, import the water temperature fluctuation value, the water quality particle fluctuation value, and the water pressure fluctuation value within one acquisition period into the water flow model, and then obtain the water flow influence coefficient. The water flow model is expressed as:

[0047]

[0048] Among them, SL(T, K, P) represents the water flow coefficient, T represents the water temperature fluctuation value, K represents the water quality particle fluctuation value, P represents the water pressure fluctuation value, α represents the influence factor of the water temperature fluctuation value on the reading deviation of the standard mechanical water meter, β represents the influence factor of the water quality particle fluctuation value on the reading deviation of the standard mechanical water meter, γ represents the influence factor of the water pressure fluctuation value on the reading deviation of the standard mechanical water meter. The water flow model quantifies the comprehensive influence of the water flow dynamic characteristics on the mechanical water meter through weighted average. The larger the value of SL(T, K, P), the more significant the influence of the water flow fluctuation on the reading deviation. For example, if the water temperature fluctuates violently (α is larger), then the contribution of the water temperature to the deviation dominates. Among them, the specific values of α, β, and γ are obtained by importing the water temperature fluctuation value, the water quality particle fluctuation value, and the water pressure fluctuation value into the SPSS software for analysis.

[0049] Preferably, import the mechanical water meter rotation resistance information and vibration information within one acquisition period into the mechanical water meter state model to obtain the mechanical water meter state coefficient. Among them, the mechanical water meter state model is expressed as:

[0050]

[0051] Among them, SB(F, f) represents the mechanical water meter state coefficient, F represents the mechanical water meter rotation resistance information, F represents the vibration information, δ, μ represent the weights of the corresponding rotation resistance information and vibration information. The mechanical water meter state model comprehensively evaluates the health state of the mechanical water meter through the Euclidean norm (square root of the sum of squares). The higher the value of SB(F, f), the more serious the abnormality of the mechanical components (such as increased resistance or intensified vibration), which directly affects the reliability of the reading. Among them, the specific values of δ and μ are obtained by importing the rotation resistance information and vibration information into the SPSS software for analysis.

[0052] Preferably, the mechanical water meter reading deviation model is expressed as:

[0053]

[0054] Among them, DB(SL(T, K, P), SB(F, f)) represents the mechanical water meter reading deviation coefficient, SL(T, K, P) represents the water flow coefficient, SB(F, f) represents the mechanical water meter state coefficient, R represents the value after dimensionless normalization of the water meter connection pipe radius, σ and ω represent the corresponding weight coefficients of the mechanical water meter reading deviation coefficient and the water flow coefficient. The mechanical water meter reading deviation model linearly superimposes the influence of water flow dynamics SL(T, K, P) and the influence of mechanical state SB(F, f), and through the normalization processing of the pipe radius, the comprehensive reading deviation coefficient DB(SL(T, K, P), SB(F, f)) is obtained. The larger the DB(SL(T, K, P), SB(F, f)), the greater the difference between the actual reading and the electronic reading, and subsequent correction models need to be adjusted. Among them, the specific values of σ and ω can be obtained by importing the water flow coefficient and the mechanical water meter state coefficient into the SPSS software for analysis.

[0055] Preferably, the reading determination model is expressed as:

[0056] DQ = DN(1 + DB(SL(T, K, P), SB(F, f)))

[0057] Among them, DQ represents the actual estimated reading of the mechanical water meter, DN represents the existing reading of the mechanical water meter, and DB(SL(T, K, P), SB(F, f)) represents the mechanical water meter reading deviation coefficient. The reading determination model realizes dynamic correction by superimposing the deviation coefficient DB(SL(T, K, P), SN(F, f))) on the existing reading. For example, if DB(SL(T, K, P), SB(F, f))) = 0.06, the actual estimated reading is 1.06 times the current reading, reflecting the cumulative error caused by water flow or mechanical anomalies.

[0058] A non-magnetic water meter using the above non-magnetic water meter reading correction method includes a non-magnetic water meter body 1, a water meter movement 2, an electromagnetic reading device (not shown in the figure), and a camera direct reading device for reading the water meter movement (not shown in the figure). The water meter movement 2 is embedded and installed in the non-magnetic water meter body 1. It further includes an adjusting mechanism 3 for adjusting the reading of the water meter movement. The adjusting mechanism includes a micro motor 301 and an electromagnetic telescopic rod 302. The micro motor 301 is embedded and installed in the non-magnetic water meter body 1. One end of the electromagnetic telescopic rod 302 is fixedly connected to the output shaft of the micro motor 301. The free end of the electric telescopic rod 302 is in sliding fit with a limit groove 202 formed on the impeller shaft 201 of the water meter movement 2, and can drive the impeller shaft 201 to rotate by using the micro motor, thereby changing the reading of the water meter movement.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for correcting readings of a non-magnetic water meter, characterized in that: The following steps are involved: Acquire water flow data information of a non-magnetic water meter and status data information of a mechanical water meter in the non-magnetic water meter within a collection cycle, wherein the water flow information includes water temperature information, water quality particle information and water pressure information, and the status data information of the mechanical water meter includes rotation resistance information and vibration information; Establish a water flow impact model, import the water temperature fluctuation value, water quality particle fluctuation value and water pressure fluctuation value formed according to the water flow data information into the water flow model, and obtain the water flow impact coefficient; Establish a mechanical water meter state model, and import the mechanical water meter state data information into the mechanical water meter state model to obtain the mechanical water meter state coefficient; A mechanical water meter reading deviation model is established. If there is no abnormality in the water flow influence coefficient and the mechanical water meter state coefficient within a collection cycle, the non-magnetic water meter electronic reading is modified to the mechanical water meter reading. If there is an abnormality in at least one of the water flow influence coefficient and the mechanical water meter state coefficient within a collection cycle, the water flow influence coefficient obtained by the water flow influence model and the mechanical water meter state coefficient obtained by the mechanical water meter state model are introduced into the reading deviation model to obtain the mechanical water meter reading deviation coefficient. The obtained mechanical water meter reading deviation coefficient is substituted into the preset reading determination model to obtain the actual estimated reading of the mechanical water meter. The obtained actual estimated reading of the mechanical water meter is subjected to difference processing with the electronic reading of the non-magnetic water meter, and then absolute value processing is performed to obtain the absolute value of the reading difference. If the obtained reading difference absolute value is within the preset difference threshold, the mechanical water meter reading and the electronic reading are adjusted to the actual estimated reading. If the obtained reading difference absolute value exceeds the difference threshold, the mechanical water meter reading is adjusted to make the mechanical water meter reading the same as the electronic reading.

2. The non-magnetic water meter reading correction method according to claim 1, characterized in that: The method for judging whether there are abnormalities in the water flow influence coefficient and the mechanical water meter status coefficient within a collection cycle is: compare the water flow influence coefficient and the mechanical water meter status coefficient with the corresponding water flow influence coefficient threshold and the mechanical water meter status coefficient threshold. If the two are within the corresponding thresholds, it indicates that there is no abnormality in the water flow influence coefficient and the mechanical water meter status coefficient. If the two are not within the corresponding thresholds, it indicates that the water flow influence coefficient and the mechanical water meter status coefficient are abnormal.

3. The non-magnetic water meter reading correction method according to claim 1, characterized in that: The method for obtaining the water temperature fluctuation value is: establishing a curve chart of the relationship between water temperature and time within a collection cycle, and obtaining its maximum slope within a collection cycle as the water temperature fluctuation value. The method for obtaining the water quality particle fluctuation value and the water pressure fluctuation value is consistent with the method for obtaining the water temperature fluctuation value.

4. The non-magnetic water meter reading correction method according to claim 1, characterized in that: The water temperature fluctuation value, water quality particle fluctuation value and water pressure fluctuation value within a collection period are introduced into the water flow model to obtain the water flow influence coefficient. The water flow model is expressed as: Among them, SL(T,K,P) represents the water flow coefficient, T represents the water temperature fluctuation value, K represents the water quality particle fluctuation value, P represents the water pressure fluctuation value, α represents the influence factor of the water temperature fluctuation value on the standard mechanical water meter reading deviation, β represents the influence factor of the water quality particle fluctuation value on the standard mechanical water meter reading deviation, and γ represents the influence factor of the water pressure fluctuation value on the standard mechanical horizontal reading deviation.

5. The non-magnetic water meter reading correction method according to claim 4, characterized in that: The rotational resistance information and vibration information of the mechanical water meter within a collection cycle are introduced into the mechanical water meter state model to obtain the mechanical water meter state coefficient, wherein the mechanical water meter state model is expressed as: Among them, SB(F,f) represents the state coefficient of the mechanical water meter, F represents the rotational resistance information of the mechanical water meter, F represents the vibration information, and δ and μ represent the weights of the corresponding rotational resistance information and vibration information.

6. The non-magnetic water meter reading correction method according to claim 5, characterized in that: The mechanical water meter reading deviation model is expressed as: Among them, DB(SL(T,K,P),SB(F,f)) represents the mechanical water meter reading deviation coefficient, SL(T,K,P) represents the water flow coefficient, SB(F,f) represents the mechanical water meter state coefficient, R represents the dimensionless value of the water meter connecting pipe radius, σ and ω represent the corresponding mechanical water meter reading deviation coefficient and the weight coefficient of the water flow coefficient.

7. The non-magnetic water meter reading correction method according to claim 6, characterized in that: The reading determination model is expressed as: DQ=DN(1+DB(SL(T,K,P),SB(F,f))) Among them, DQ represents the actual estimated reading of the mechanical water meter, DN represents the actual reading of the mechanical water meter, and DB(SL(T,K,P),SB(F,f)) represents the deviation coefficient of the mechanical water meter reading.

8. The method for correcting the readings of a non-magnetic water meter according to any one of claims 1 to 7, characterized in that: The one collection cycle is a reading collection cycle of a non-magnetic water meter using a camera direct reading technology.

9. A non-magnetic water meter, using the non-magnetic water meter reading correction method according to claim 1, characterized in that: The invention comprises a non-magnetic water meter body (1), a water meter movement (2), an electromagnetic reading device and a camera direct reading device for reading the water meter movement. The water meter movement (2) is embedded in the non-magnetic water meter body (1). The invention also comprises an adjustment mechanism (3) for adjusting the reading of the water meter movement. The adjustment mechanism comprises a micro motor (301) and an electromagnetic telescopic rod (302). The micro motor (301) is embedded in the non-magnetic water meter body (1). One end of the electromagnetic telescopic rod (302) is fixedly connected to the output shaft of the micro motor (301). The free end of the electric telescopic rod (302) is slidably matched with a limit groove (202) provided on the impeller shaft (201) of the water meter movement (2).

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