Distributed balanced measurement system and method for water content of mixed oil

Abstract

The invention discloses a distributed balanced measurement system and method for the water content of mixed oil, and the system comprises a first outer cylinder which is used for placing an impedance measurement device; the impedance measuring device is arranged in the first outer cylinder, the impedance measuring device comprises an inner electrode wrapped with an insulating layer and a second outer cylinder, the inner electrode is arranged in the second outer cylinder, and the second outer cylinder serves as an outer electrode to be grounded; and the data processing device is used for applying an alternating electric field to the impedance measuring device and processing measured data to obtain the water content of the mixed oil liquid to be measured. The impedance measurement device array is arranged in the first outer cylinder, mixed oil to be measured is divided into multiple strands of oil media to directly enter the impedance measurement devices, so that the characteristics of the mixed oil to be measured are similar to those of uniform media, measurement errors caused by non-uniform oil media in a previous measurement mode are avoided, and the measurement accuracy is improved. And the measurement result of the water content is corrected.

Description

Technical Field

[0001] This application relates to the technical field of oil moisture content detection, and particularly to a distributed balanced measurement system and method for the moisture content of mixed oil. Background Art

[0002] During the production and transportation of petroleum, the moisture content of the oil directly affects the product quality and economic benefits. However, due to the influence of factors such as temperature, the measurement of the moisture content is non-linear, and the known methods for measuring the moisture content of oil still have certain limitations and errors. The methods for measuring the moisture content of oil include the density method, the capacitance method, the distillation method, the electromagnetic method, etc.

[0003] The density method utilizes the large difference in physical properties between the water phase and the oil phase. By detecting the density, the moisture content can be obtained, but it is applicable to oil wells with high water content and is greatly affected by temperature. The distillation method is a static method for measuring the moisture content of crude oil. By measuring the mass of water and oil in it, the moisture content is obtained. This method not only has errors but also is dangerous to the environment and workers. The electromagnetic method is a dynamic method. Currently, the main methods applied to the market include the following: the short-wave method, the infrared method, the ray method, the microwave method, etc. These methods have a small application range, high cost, and great measurement difficulty.

[0004] Currently, the more commonly used measurement method is the capacitance impedance method. It ignores the non-uniform distribution of the mixed oil in space. Therefore, it is necessary to change the electrode distribution to make the mixed oil similar to a uniform medium in space and improve the measurement accuracy. Summary of the Invention

[0005] The embodiments of this application provide a distributed balanced measurement system and method for the moisture content of mixed oil to solve the technical problem that the inaccurate measurement of the impedance of the mixed oil caused by the non-uniform distribution of the mixed oil in space in the prior art, which in turn affects the measurement of the moisture content in the mixed oil.

[0006] On the one hand, the embodiments of this application provide a distributed balanced measurement system for the moisture content of mixed oil. The system includes: At least one first outer cylinder for placing the impedance measurement device; At least one impedance measurement device is arranged inside the first outer cylinder. The impedance measurement device includes: an inner electrode wrapped with an insulating layer and a second outer cylinder. The inner electrode is arranged inside the second outer cylinder, and the second outer cylinder is grounded as the outer electrode; A data processing device for applying an alternating electric field to all impedance measurement devices and processing the measured data to obtain the moisture content of the mixed oil to be measured.

[0007] Preferably, when the number of impedance measurement devices is more than two, the impedance measurement devices are arranged inside the first outer cylinder in an array manner; The array mode includes at least one of the following: circular array, square array or triangular array.

[0008] Preferably, when the number of impedance measurement devices is more than two, the impedance measurement devices are evenly arranged inside the first outer cylinder.

[0009] Preferably, the data processing device includes: A signal generator and an acquisition module, configured to apply an alternating electric field to the impedance measurement device and acquire the voltage signal and current signal between the inner electrode and the second outer cylinder; A data processing module, configured to process the acquired voltage signal and current signal to obtain the moisture content of the mixed oil to be measured.

[0010] Preferably, the data processing module processes the acquired voltage signal and current signal, including: Calculating the impedance value measured by a single impedance measurement device based on the voltage signal and the current signal; Accumulating the impedance values measured by all impedance measurement devices to obtain the total impedance value; Calculating the average impedance value of the mixed oil to be measured based on the total impedance value and the number of impedance measurement units; Calculating the dielectric constant of the mixed oil to be measured based on the average impedance value and the fitting curve function of the dielectric constant - average impedance value; Calculating the moisture content of the mixed oil to be measured based on the dielectric constant and the dielectric constant - moisture content model.

[0011] On the other hand, the present application also provides a distributed equilibrium measurement method for the moisture content of a mixed oil, and the method includes: Obtaining the average impedance value of the mixed oil to be measured; Calculating the dielectric constant of the mixed oil to be measured based on the average impedance value and the fitting curve function of the dielectric constant - average impedance value; Calculating the moisture content of the mixed oil to be measured based on the dielectric constant and the dielectric constant - moisture content model.

[0012] Preferably, obtaining the average impedance value of the mixed oil to be measured includes: Applying an alternating electric field to the impedance measurement device array; Acquiring the voltage signal and current signal of the impedance measurement device array in the mixed oil to be measured; Processing the voltage signal and current signal to obtain the average impedance value of the mixed oil to be measured.

[0013] Preferably, the method further includes adjusting the measurement accuracy of the moisture content by controlling the density of the impedance measurement device.

[0014] On the other hand, the present application also provides a computing device, including: a memory and a processor. Wherein, a distributed equilibrium measurement program for the water content of the mixed oil fluid is stored on the memory. When the distributed equilibrium measurement program for the water content of the mixed oil fluid is executed by the processor, the steps of the distributed equilibrium measurement method for the water content of the mixed oil fluid as described above are implemented.

[0015] On the other hand, the present application also provides a computer-readable storage medium. The readable storage medium stores a computer program. When the computer program is executed, the distributed equilibrium measurement method for the water content of the mixed oil fluid as described above is implemented.

[0016] The distributed equilibrium measurement system and method for the water content of the mixed oil fluid in the present application have the following advantages: In the solution of the present application, by arranging an impedance measurement device array in the first outer cylinder, the mixed oil fluid to be measured is shunted into multiple oil fluid media. Through each impedance measurement device placed inside the first outer cylinder, the characteristics exhibited by the mixed oil fluid to be measured are similar to those of a uniform medium. By measuring the impedance values of the multiple oil fluid media, the average impedance value of the mixed oil fluid to be measured is calculated, and then the water content of the mixed oil fluid to be measured is calculated based on the average impedance value, avoiding the measurement error caused by the unevenness of the oil fluid medium in the previous measurement methods, and correcting the measurement result of the water content. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the distributed equilibrium measurement system for the water content of the mixed oil fluid provided by the embodiment of the present application; Figure 2 It is a schematic internal structure diagram of the first outer cylinder provided by the embodiment of the present application; Figure 3 It is a cross-sectional view of the internal structure of the first outer cylinder provided by the embodiment of the present application; Figure 4 It is a schematic diagram of the effect when the impedance measurement device array is in a square array provided by the embodiment of the present application; Figure 5 It is a schematic diagram of the effect when the impedance measurement device array is in a circular array provided by the embodiment of the present application; Figure 6 It is a schematic diagram of the effect when the impedance measurement device array is in a triangular array provided by the embodiment of the present application; Figure 7Schematic flow chart of the distributed equilibrium measurement method for the water content of the mixed oil provided by the embodiment of the present application; Figure 8 Schematic diagram of the fitting curve of dielectric constant - average impedance value provided by the embodiment of the present application; Figure 9 Schematic diagram of the residual of the fitting curve of dielectric constant - average impedance value provided by the embodiment of the present application; Figure 10 Trend chart of absolute error and relative error of the measured data provided by the embodiment of the present application. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] In the prior art, when measuring the impedance of a mixed oil dynamically or statically, due to the physical properties of the oil, the mixed oil has uneven characteristics, resulting in different impedance values of the mixed oil measured at different positions of the mixed oil, thus leading to a large error in the finally measured water content.

[0021] Refer to Figure 1 、 Figure 2 and Figure 3 As shown, it is a schematic structural diagram of the distributed equilibrium measurement system for the water content of the mixed oil provided by the embodiment of the present application. The distributed equilibrium measurement system for the water content of the mixed oil provided by the embodiment of the present application includes: a first outer cylinder, an impedance measurement device arranged inside the first outer cylinder, and a data processing device. Among them, the impedance measurement device includes: an inner electrode wrapped with an insulating layer on the outside and a second outer cylinder. The inner electrode is arranged inside the second outer cylinder, and the second outer cylinder is grounded as an outer electrode; an alternating electric field is applied to the impedance measurement device through the data processing device, and the data of the impedance measurement device is collected and calculated to obtain the water content of the mixed oil to be measured.

[0022] In the embodiment of the present application, when measuring the water content of the mixed oil to be measured through the distributed equilibrium measurement system for the water content of the mixed oil of the present application, first ensure that the mixed oil flows through the impedance measurement device arranged inside the first outer cylinder. Furthermore, an alternating electric field is applied to the impedance measurement device through the data processing device, so that voltage signals, current signals and other data are generated inside the mixed oil to be measured between the inner electrode and the second outer cylinder of the impedance measurement device. By collecting and processing the voltage signals and current signals of the impedance measurement device, the water content of the mixed oil to be measured is finally obtained.

[0023] In an embodiment of the present application, in order to make the measured moisture content of the mixed oil more accurate, the impedance measurement device is arranged in the first outer cylinder in an array manner, so that when the mixed oil to be measured passes through the impedance measurement device array, the mixed oil to be measured in the first outer cylinder is finely divided in a similar grid manner, and the characteristics shown are similar to those of a homogeneous medium. Therefore, after averaging the detected impedance values, the measurement result of the moisture content of the mixed oil to be measured is more accurate.

[0024] In one embodiment, a plurality of impedance measurement devices are arranged inside the first outer cylinder in a square array, as shown in Figure 4 shown; in one embodiment, a plurality of impedance measurement devices are arranged inside the first outer cylinder in a circular array, as shown in Figure 5 shown; in one embodiment, a plurality of impedance measurement devices are arranged inside the first outer cylinder in a triangular array, as shown in Figure 6 shown; in another embodiment, a plurality of impedance measurement devices are evenly arranged inside the first outer cylinder without using a specific array method. The above settings of the plurality of impedance measurement devices are all exemplary descriptions and cannot be used as a limitation of the protection scope of the present application. Other setting methods based on the above concepts are also within the protection scope of the present application.

[0025] In an embodiment of the present application, when measuring the moisture content of the mixed oil to be measured, the accuracy of measuring the moisture content is also adjusted by adjusting the density or the number of impedance measurement devices. In this embodiment, when an alternating electric field is applied, the greater the density or the number of impedance measurement devices, the higher the accuracy of the average impedance value of the mixed oil to be measured, and the higher the accuracy corresponding to the measurement of the moisture content; on the contrary, when an alternating electric field is applied, the smaller the density or the number of impedance measurement devices, the lower the accuracy of the average impedance value of the mixed oil to be measured, and the lower the accuracy corresponding to the measurement of the moisture content.

[0026] In an embodiment of the present application, the data processing device includes a signal generator, a collection module, and a data processing module. When measuring the average impedance value of the to-be-measured mixed oil liquid, specifically, the signal generator and the collection module apply an alternating electric field to the inner electrode and the second outer cylinder of the impedance measuring device, collect the voltage signal and the circuit signal between the inner electrode and the second outer cylinder, and the data processing module calculates the impedance value of a single impedance measuring device based on the voltage signal and the current signal, and then accumulates the impedance values measured by all impedance measuring devices to obtain the total impedance value. Further, based on the total impedance value and the number of impedance measuring devices, the average impedance value of the to-be-measured mixed oil liquid is calculated, and based on the average impedance value and the curve function previously fitted based on the dielectric constant and the average impedance value, the dielectric constant of the to-be-measured mixed oil liquid is calculated. Further, in combination with the dielectric constant of the to-be-measured mixed oil liquid and the dielectric constant-water content model, the water content of the to-be-measured mixed oil liquid is calculated.

[0027] In one embodiment, when calculating the impedance value of the impedance measuring device based on the collected voltage signal and current signal, the impedance value measured by the impedance measuring device is calculated using the following calculation formula: A = V / I (1) Where, A is the impedance value, V is the voltage signal, I is the current signal.

[0028] Further, the total impedance value is obtained by accumulating the impedance values measured by all impedance measuring devices, and the calculation is performed according to the following calculation formula: (2) Where, is the total impedance value measured by the impedance measuring device array, is the impedance value measured by the i th impedance measuring device, n is the number of impedance measuring devices.

[0029] Further, based on the total impedance value and the number n of impedance measuring devices, the average impedance value is calculated, and the average impedance value is calculated according to the following formula : (3) In this embodiment, the radius of the inner electrode in the impedance measuring device is r, the radius of the insulating layer wrapped outside the inner electrode is D, the radius of the second outer cylinder is R, and the derivation of the impedance value A calculation formula of the impedance measuring device is as follows: (4) Where, , dis the constant impedance value brought by the insulating layer wrapped around the inner electrode, is the permittivity of vacuum, is the height of the impedance measuring device, is the permittivity of the mixed oil to be measured.

[0030] Further, based on the average impedance value and the fitting curve function of permittivity-average impedance value obtained above, the permittivity of the mixed oil to be measured is calculated. The calculation expression of the fitting curve function of permittivity-average impedance value is as follows: (5) In this embodiment, after calculating the average impedance value of the mixed oil to be measured, the permittivity of the mixed oil to be measured is obtained by combining the above fitting curve function of permittivity-average impedance value.

[0031] In the embodiment of the present application, the permittivity of the mixed oil to be measured is derived according to the following calculation formula: (6) where, , , is the permittivity of oil, is the permittivity of water, is the water content of the mixed oil to be measured.

[0032] In the embodiment of the present application, the average impedance value and the water content are combined according to calculation formula (5) and calculation formula (6), and the calculation formula is as follows: (7) Substituting calculation formula (7) and calculation formula (2) into calculation formula (3), the calculation formula of the relative impedance value and the water content is as follows: (8) In the embodiment of the present application, after substituting the impedance value measured by each impedance measuring device into the above calculation formula (8), the water content of the mixed oil is finally calculated. In this embodiment, the measurement accuracy of the water content of the mixed oil to be measured is also adjusted by controlling the density (or quantity) of the impedance measuring devices in the impedance measuring device array. When the density (or quantity) of the impedance measuring devices in the impedance measuring device array is larger (or more), the measurement accuracy of the corresponding water content is higher, and vice versa, the measurement accuracy of the water content is lower.

[0033] Reference Figure 7As shown, the present application also provides a distributed equilibrium measurement method for the water content of a mixed oil fluid. The method includes: Obtaining the average impedance value of the mixed oil fluid to be measured; Based on the average impedance value and the fitting curve function of the dielectric constant - average impedance value, calculating the dielectric constant of the mixed oil fluid to be measured; Based on the dielectric constant and the dielectric constant - water content model, calculating the water content of the mixed oil fluid to be measured.

[0034] In an embodiment of the present application, when measuring the water content of the mixed oil fluid to be measured, first an alternating electric field is applied to the impedance measurement device array placed in the mixed oil fluid to be measured, and at the same time, the voltage signal and current signal of the impedance measurement device array in the mixed oil fluid to be measured are collected. The average impedance value of the mixed oil fluid to be measured is obtained by calculating the voltage signal and current signal.

[0035] In this embodiment, before establishing the fitting curve function of the dielectric constant - average impedance value, the media with different dielectric constants are tested through the impedance measurement device array, the corresponding average impedance values are calculated according to the obtained impedance data, and then the dielectric constants of different media and the corresponding average impedance values are fitted to obtain the fitting curve of the dielectric constant - average impedance value, as shown in Figure 8 shown.

[0036] As shown in Figure 9 shown, the present application also provides a residual plot of the fitting curve of the dielectric constant - average impedance value. Based on the residual plot, it can be seen that in terms of the overall trend, in the low dielectric constant region ( < 30), the residuals are mostly negative values (for example: When ε = 2, the residual is -2.12, and the relative error is 106.1%), indicating that the proposed curve function significantly underestimates the actual value in this region. The possible reasons are: the non - uniformity of the oil - water mixture increases at low water content, or the fitting is insufficient due to sparse calibration data.

[0037] In the medium - high dielectric constant region ( ≥ 30), the residuals gradually tend to zero ( When ε = 50, the residual is -0.25, and the relative error is 0.5%), then the prediction accuracy of the proposed curve function is significantly improved. In terms of the residual change rule, the residuals show a non - linear convergence trend as ε increases, but there are local fluctuations (for example: When ε = 24, the residual suddenly drops to -0.01, When ε = 76, the residual suddenly changes to -0.05); abnormal points: When ε = 2, the relative error is as high as 106.1%, which may be because the extremely low water content condition exceeds the applicable range of the model, or the sensor sensitivity is insufficient.

[0038] Based on the above analysis, a systematic deviation analysis is carried out. In terms of the global deviation: Low The regional residuals continue to be negative, and high The regional residuals fluctuate less, indicating that the model has poor adaptability to the low moisture content conditions. The possible reasons are that the non-linear characteristics of the fitting formula (cubic polynomial) in the low value range are not fully captured, or the calibration data distribution is uneven.

[0039] In terms of the piecewise characteristics, in = 30 - 50 interval, the absolute value of the residual gradually decreases (for example When = 30, the residual is -1.29, When = 50, the residual is -0.25), indicating that the model performs stably in the medium and high moisture content intervals and is applicable to common industrial conditions.

[0040] According to the above deviation diagnosis, the fitting curve function of the dielectric constant - average impedance value is optimized, so that the dielectric constant of the measured mixed oil can be accurately calculated based on the average impedance value.

[0041] In this embodiment, based on the above analysis, the following optimization suggestions for the fitting curve function of the dielectric constant - average impedance value are as follows: Increase the calibration data in the low region especially in < 10 interval to improve the fitting accuracy; Adjust the form of the fitting function, such as introducing a piecewise polynomial or an exponential term, to enhance the non-linear expression ability in the low value range; Introduce the weighted least squares method, and assign higher weights to the high residual regions (such as < 30) to suppress the influence of heteroscedasticity.

[0042] As shown in the reference Figure 10 The present application also provides an absolute error trend chart and a relative error trend chart of the measured data. Based on the absolute error trend chart and the relative error trend chart, it can be seen that in the low dielectric constant region ( < 30, corresponding to the moisture content < 50%), the absolute error: is significantly negatively biased, indicating that the predicted value of the proposed curve function is lower than the true value; the relative error: is extremely high, indicating that the reliability of the proposed curve function under low moisture content conditions is insufficient.

[0043] The possible reasons are that when the moisture content is low, the oil-water mixing non-uniformity increases, resulting in local impedance fluctuations; the calibration data is sparse in the low interval, and it is difficult for the fitting formula (cubic polynomial) to capture the non-linear characteristics. In the medium and high dielectric constant region ( = 30 - 60, corresponding to the moisture content = 50% - 90%), absolute error: gradually approaching zero; relative error: dropping to 0.5% - 5%. The proposed curve function shows stability. The possible reasons are: at medium to high water contents, the oil - water mixture is more uniform, and the impedance measurement has high consistency; the calibration data coverage is sufficient, and the fitting function has good accuracy optimization in this region. In the high dielectric constant region ( > 60, corresponding water content > 90%), absolute error: fluctuating slightly; relative error: still remaining at a low level (< 5%), but systematic deviation needs to be vigilant.

[0044] The possible reasons are: at extremely high water contents, the proportion of the oil phase is extremely low, and the sensor sensitivity may decrease; the assumption of the proposed curve function (water dispersed in oil) gradually fails at high water contents.

[0045] In this embodiment, based on the above analysis, the following optimization suggestions are made for the fitting curve function of dielectric constant - average impedance value: Piece - wise fitting: Divide into low, medium, and high intervals, and use polynomials or physical functions of different orders respectively; Introduce a temperature compensation term: Add a temperature - related variable ( = f (A ave , T)) to the fitting formula to dynamically correct the dielectric constant; Machine learning optimization: Use neural network to learn the residual law to replace the traditional polynomial and improve the non - linear adaptability.

[0046] In this embodiment, Figure 9 and Figure 10 The data relied on is shown in Table 1.

[0047] Table 1 Figure 9 and Figure 10 The data relied on in

[0048] In the embodiment of the present application, after obtaining the dielectric constant of the to - be - measured mixed oil liquid based on the above - mentioned average impedance value and the fitting curve function of dielectric constant - average impedance value, the water content of the to - be - measured mixed oil liquid is further calculated according to the dielectric constant - water content model.

[0049] The embodiment of the present application also provides a computing device, including: a memory, a processor. Among them, a distributed equilibrium measurement program for the water content of the mixed oil liquid is stored on the memory. When the distributed equilibrium measurement program for the water content of the mixed oil liquid is executed by the processor, the steps of the above - mentioned distributed equilibrium measurement method for the water content of the mixed oil liquid are implemented.

[0050] An embodiment of the present application further provides a computer-readable storage medium. The readable storage medium stores a computer program, and when the computer program is executed, the distributed equilibrium measurement method for the moisture content of the mixed oil fluid as described above is implemented.

[0051] In summary, in the present application, an impedance measurement device array is provided inside the first outer cylinder, and the to-be-measured mixed oil fluid passing through the first outer cylinder is shunted into multiple oil fluid media, so that the characteristics exhibited by the to-be-measured mixed oil fluid are similar to those of a homogeneous medium. By measuring the impedance values of the multiple oil fluid media, the average impedance value of the to-be-measured mixed oil fluid is further calculated, and based on the average impedance value, the moisture content of the to-be-measured mixed oil fluid is calculated, avoiding the measurement error caused by the unevenness of the oil fluid medium in the previous measurement method, and correcting the measurement result of the moisture content.

[0052] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A distributed balanced measurement system for the water content of mixed oil, characterized in that: The system comprises: At least one first outer cylinder, used for placing an impedance measuring device; At least one impedance measuring device is arranged inside the first outer cylinder, the impedance measuring device comprises: an inner electrode wrapped with an insulating layer and a second outer cylinder, wherein the inner electrode is arranged inside the second outer cylinder, and the second outer cylinder is connected to the ground as an outer electrode; The data processing device is used to apply an alternating electric field to the impedance measuring device, collect data from the impedance measuring device for processing, and obtain the water content of the mixed oil to be measured.

2. The distributed balanced measurement system for the water content of mixed oil according to claim 1, characterized in that: When the number of the impedance measuring devices is two or more, the impedance measuring devices are arranged inside the first outer cylinder in an array manner; The array method includes at least one of the following arrays: a circular array, a square array and a triangular array.

3. The distributed balanced measurement system for the water content of mixed oil according to claim 1, characterized in that: When the number of the impedance measuring devices is two or more, the impedance measuring devices are evenly arranged inside the first outer tube.

4. The distributed balanced measurement system for the water content of mixed oil according to any one of claims 1 to 3, characterized in that: The data processing device comprises: A signal generator and acquisition module, used for applying an alternating electric field to the impedance measuring device and acquiring a voltage signal and a current signal between the inner electrode and the second outer cylinder; The data processing module is used to process the collected voltage signal and the current signal to obtain the water content of the mixed oil to be tested.

5. The distributed balanced measurement system for the water content of mixed oil according to claim 4, characterized in that: The data processing module processes the collected voltage signal and the current signal, including: Obtaining an impedance value measured by a single impedance measuring device by calculation based on the voltage signal and the current signal; Accumulating the impedance values ​​measured by all the impedance measuring devices to obtain a total impedance value; Calculate the average impedance value of the mixed oil to be tested based on the total impedance value and the number of the impedance measuring devices; The dielectric constant of the mixed oil to be tested is calculated based on the average impedance value and the fitting curve function of the dielectric constant-average impedance value; Based on the dielectric constant and the dielectric constant-water content model, the water content of the mixed oil to be tested is calculated.

6. A distributed balanced measurement method for the water content of a mixed oil, characterized in that: The method is applied to the distributed balanced measurement system for the water content of the mixed oil according to any one of claims 1 to 5, and the method comprises: Obtain the average impedance value of the mixed oil to be tested; The dielectric constant of the mixed oil to be tested is calculated based on the average impedance value and the fitting curve function of the dielectric constant-average impedance value; Based on the dielectric constant and the dielectric constant-water content model, the water content of the mixed oil to be tested is calculated.

7. The distributed balanced measurement method for the water content of mixed oil according to claim 6, characterized in that: The step of obtaining the average impedance value of the mixed oil to be tested includes: applying an alternating electric field to the array of impedance measuring devices; Collecting voltage signals and current signals of the array of the impedance measuring device in the mixed oil to be tested; The voltage signal and the current signal are processed to obtain an average impedance value of the mixed oil to be tested.

8. The distributed balanced measurement method for the water content of mixed oil according to claim 7, characterized in that: The method further includes: adjusting the measurement accuracy of the water content by controlling the density of the impedance measuring device.

9. A computing device, characterized in that: The computing device includes: a memory and a processor, wherein the memory stores a distributed balanced measurement program for the water content of a mixed oil, and when the stored distributed balanced measurement program for the water content of a mixed oil is executed by the processor, the steps of the distributed balanced measurement method for the water content of a mixed oil as described in any one of claims 6-8 are implemented.

10. A computer-readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed, the distributed balanced measurement method for the water content of the mixed oil according to any one of claims 6 to 8 is implemented.

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