A method and system for testing the oil film stability of emulsion explosive

Abstract

The present application relates to the technical fields of electromagnetic variable measurement and analysis, and discloses a method and system for testing the stability of an emulsion explosive oil film. The method comprises: placing an emulsion explosive sample between a first electrode and a second electrode in a test container to obtain a target oil film, and forming an electrical contact for the target oil film; applying an alternating voltage signal to the first electrode and the second electrode to generate a polarization response; collecting dynamic response data of complex impedance with respect to an excitation frequency to obtain an impedance response data set; decoupling a virtual part capacitance component of the target oil film from the impedance response data set, and constructing a virtual part capacitance frequency response map with the change in the excitation frequency as the horizontal axis and the virtual part capacitance component as the vertical axis; identifying a relaxation peak feature of the virtual part capacitance frequency response map to obtain an interface relaxation characteristic value; and comparing the interface relaxation characteristic value with a preset standard characteristic value to determine the stability of the target oil film. The present application can improve the efficiency of testing the stability of an emulsion explosive oil film.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic variable measurement and analysis technology, and in particular to a method and system for testing the stability of oil films in emulsion explosives. Background Technology

[0002] Currently, the detection of oil film stability in emulsion explosives relies heavily on methods such as static layering observation, microstructural analysis, accelerated centrifugation tests, or thermal aging comparisons. While these methods can reflect whether significant demulsification or layering has occurred at the macroscopic level, they often fail to capture the changing trends in the early stages of microscopic instability at the interface. For example, in the early stages of emulsion explosive storage, changes in local polarization migration capacity or uneven interfacial charge distribution may occur at the oil-water interface, but no visible layering has yet appeared macroscopically. In this case, traditional observation methods are insufficient to identify potential risks. Similarly, while microscopic image analysis can observe changes in dispersed phase particle size, it is significantly affected by sample preparation, lighting conditions, and manual interpretation, resulting in insufficient repeatability and quantification.

[0003] Furthermore, existing detection methods generally suffer from problems such as long detection cycles, high levels of subjective judgment, strong destructiveness, or the inability to establish unified quantitative criteria, making it difficult to meet the demand for "rapid, objective, non-destructive, and quantifiable" detection methods in the large-scale production and rapid on-site sampling of emulsion explosives. Especially under high-temperature storage and transportation or vibration environments, subtle changes in the polarization behavior of the oil film interface often precede macroscopic stratification, and existing technologies cannot quantitatively characterize the interface relaxation characteristics at the frequency domain level.

[0004] Therefore, there is an urgent need for a testing method that can directly reflect the polarization stability of the oil film interface through electromagnetic response characteristics without damaging the emulsion structure or requiring a long aging period. This would enable rapid quantitative determination of the stability of the oil film in emulsion explosives, thereby improving detection efficiency and accuracy, and enhancing the reliability of quality control and safety assessment in the production process. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to propose a method for testing the stability of emulsion explosive oil films. This method aims to solve the technical problems in existing technologies, such as the inability to accurately capture interface characteristics at a microscopic level, low reference value of test results, cumbersome operation, low efficiency, and susceptibility to data interference, making it difficult to adapt to the needs of industrial testing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a method for testing the stability of oil film in emulsion explosives.

[0007] The method for testing the stability of the oil film in the emulsion explosive includes: S1. Place the emulsion explosive sample between the first electrode and the second electrode in the test container to obtain the target oil film of the emulsion explosive sample, so that the target oil film forms an electrical contact with the first electrode and the second electrode; S2. Apply an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response; S3. During the duration of applying the AC voltage signal, acquire dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency to obtain the impedance response dataset of the target oil film. S4. Decouple the imaginary capacitance component of the target oil film from the impedance response data set, and construct the imaginary capacitance frequency response spectrum of the target oil film with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. S5. Perform relaxation peak feature identification on the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film; S6. Compare the interface relaxation feature value with the preset standard feature value, and determine the stability of the target oil film based on the comparison result.

[0008] Preferably, the emulsion explosive sample is placed between the first and second electrodes within the test container to obtain a target oil film of the emulsion explosive sample, such that the target oil film forms electrical contact with the first and second electrodes, specifically including: The test container is placed horizontally, and an emulsion explosive sample is dropped onto the first electrode of the test container. The second electrode of the test container is slowly placed over the emulsion explosive sample, and the emulsion explosive sample is pressed into a target oil film of uniform thickness by the weight of the second electrode. Allow the target oil film to stand until the contact interface between the target oil film and the first electrode and the second electrode reaches a stable state.

[0009] Preferably, an AC voltage signal is applied to the first electrode and the second electrode to excite the target oil film to generate a polarization response, specifically including: When the contact interface reaches a stable state, set the initial frequency, termination frequency, and number of sweep points of the AC voltage signal. Following the sequence from the initial frequency to the termination frequency, at the frequency corresponding to the number of sweep points, a sinusoidal AC voltage with constant amplitude is applied to the first electrode and the second electrode. The sinusoidal AC voltage drives the charge carriers in the target oil film to undergo displacement polarization and interfacial polarization.

[0010] Preferably, during the duration of the applied AC voltage signal, dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency are acquired to obtain the impedance response dataset of the target oil film, specifically including: During the duration of the applied AC voltage signal, the displacement polarization and interfacial polarization of the target oil film are determined; Based on the displacement polarization and the interface polarization, the amplitude and phase of the response current signal of the target oil film are simultaneously acquired; Based on the amplitude of the sinusoidal AC voltage, the amplitude and phase of the response current signal are vector-decoupled to obtain the impedance modulus of the target oil film under the change of excitation frequency. The phase angle of the target oil film is determined based on the phase shift of the response current signal relative to the sinusoidal AC voltage. The impedance modulus and the phase angle are associated and stored to obtain the impedance response dataset of the target oil film.

[0011] Preferably, the imaginary capacitance component of the target oil film is decoupled from the impedance response dataset, and the imaginary capacitance frequency response spectrum of the target oil film is constructed with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. Specifically, this includes: Frequency domain decoupling is performed on the impedance response dataset to obtain the imaginary capacitance component of the target oil film; The excitation frequency change is plotted on the horizontal axis, and the imaginary capacitance component is plotted on the vertical axis. In a two-dimensional coordinate system, the horizontal and vertical coordinates are reconstructed to obtain the imaginary capacitance frequency response spectrum of the target oil film.

[0012] Preferably, relaxation peak feature identification is performed on the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film, specifically including: The frequency response spectrum of the imaginary capacitance is smoothed and denoised to obtain the processed spectrum curve of the target oil film. Identify the local maxima points appearing in the processed spectrum curve and define the local maxima points as relaxation peaks; Extract the frequency value corresponding to the relaxation peak, and use the frequency value as the first interface relaxation feature value of the target oil film; The half-peak width of the relaxation peak is extracted, and the half-peak width is used as the second interface relaxation characteristic value of the target oil film. The first interface relaxation feature value and the second interface relaxation feature value are integrated into the interface relaxation feature value of the target oil film.

[0013] Preferably, the interface relaxation feature value is compared with a preset standard feature value, and the stability of the target oil film is determined based on the comparison result, specifically including: The interface relaxation feature value is compared with a preset standard feature value. The interface relaxation feature value includes the first interface relaxation feature value and the second interface relaxation feature value. The preset standard feature value includes a standard relaxation frequency range and a standard half-peak width threshold. When the first interface relaxation feature value falls within the standard relaxation frequency range, it is determined that the interface relaxation behavior of the target oil film conforms to the standard. When the second interface relaxation eigenvalue is greater than the standard half-peak width threshold, the interface uniformity of the target oil film is determined to meet the standard. If both the interface relaxation behavior and the interface uniformity meet the standard, then the stability of the target oil film is determined to be qualified.

[0014] This invention also provides a system for testing the stability of emulsion explosive oil films, comprising: An electrode contact module is used to place an emulsion explosive sample between a first electrode and a second electrode inside a test container to obtain a target oil film of the emulsion explosive sample, thereby making electrical contact between the target oil film and the first electrode and the second electrode. A polarization response module is used to apply an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response; The frequency variation module is used to acquire dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency during the duration of the applied AC voltage signal, and obtain the impedance response dataset of the target oil film. The spectrum construction module is used to decouple the imaginary capacitance component of the target oil film from the impedance response dataset, and construct the imaginary capacitance frequency response spectrum of the target oil film with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. The feature recognition module is used to identify the relaxation peak features of the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film. A stable output module is used to compare the interface relaxation feature value with a preset standard feature value, and determine the stability of the target oil film based on the comparison result.

[0015] The present invention also provides an emulsion explosive oil film stability testing device, comprising: a memory, a processor, and an emulsion explosive oil film stability testing program stored in the memory and executable on the processor, wherein the emulsion explosive oil film stability testing program is executed by the processor to implement an emulsion explosive oil film stability testing method.

[0016] The present invention also provides a computer program product, including an emulsion explosive oil film stability testing program, wherein the emulsion explosive oil film stability testing program implements the emulsion explosive oil film stability testing method when executed by a processor.

[0017] The beneficial effects of this invention are as follows: 1. This invention relies on the principle of electromagnetic polarization response to conduct stability testing of emulsion explosive oil films. A uniform oil film is formed through precise electrode contact treatment. After applying an AC voltage to excite the polarization response of the oil film, dynamic response data of complex impedance is collected and analyzed through an electrical sensor. The imaginary capacitance component is decoupled and a frequency response spectrum is constructed. Then, the relaxation characteristic value of the interface is extracted by relaxation peak feature identification. The interface characteristics of the oil film are accurately captured at the microscopic level, so that the determination of oil film stability has a scientific and accurate quantitative basis, which greatly improves the accuracy of test results and data reference value.

[0018] 2. This invention establishes a standardized and streamlined testing system for the stability of emulsion explosive oil films. The entire process, from sample processing to data acquisition, analysis, and stability determination, follows standardized procedures, effectively simplifying testing steps and significantly improving the testing efficiency of emulsion explosive oil film stability. It also reduces interference from human intervention and external environmental factors during testing, ensuring the repeatability and consistency of test data. This system can efficiently adapt to the testing needs of industrial production and provides accurate and effective data support for emulsion explosive formulation optimization and production process improvement. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of the first embodiment of the method for testing the stability of an emulsion explosive oil film according to the present invention.

[0021] Figure 2 This is a schematic diagram of the equipment used in the method for testing the stability of an emulsion explosive oil film according to the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: As Figure 1 The diagram shown is a flowchart of the first embodiment of the method for testing the stability of emulsion explosive oil film of the present invention, which presents the first embodiment of the method for testing the stability of emulsion explosive oil film of the present invention.

[0024] In the first embodiment, the method for testing the stability of an emulsion explosive oil film includes: S1. Place the emulsion explosive sample between the first electrode and the second electrode in the test container to obtain the target oil film of the emulsion explosive sample, so that the target oil film forms an electrical contact with the first electrode and the second electrode; In this embodiment of the invention, an emulsion explosive sample is placed between a first electrode and a second electrode within a test container to obtain a target oil film of the emulsion explosive sample. The target oil film then forms electrical contact with the first electrode and the second electrode. Specifically, this includes: The test container is placed horizontally, and an emulsion explosive sample is dropped onto the first electrode of the test container. The second electrode of the test container is slowly placed over the emulsion explosive sample, and the emulsion explosive sample is pressed into a target oil film of uniform thickness by the weight of the second electrode. Allow the target oil film to stand until the contact interface between the target oil film and the first electrode and the second electrode reaches a stable state.

[0025] Keep the test container horizontal and stable, take an emulsion explosive sample, and evenly drop and spread it on the surface of the first electrode inside the test container so that the emulsion explosive sample completely covers the effective detection area of ​​the first electrode.

[0026] The second electrode of the test container is slowly placed on the surface of the emulsion explosive sample from above. The weight of the second electrode itself applies uniform pressure to the emulsion explosive sample, causing the emulsion explosive sample to be squeezed between the first and second electrodes to form a target oil film of uniform thickness.

[0027] After the target oil film is formed, the test container is kept stationary, and the relative positions of the first electrode, the target oil film and the second electrode are kept unchanged until the contact interface between the target oil film and the first electrode, and between the target oil film and the second electrode no longer changes and remains stable.

[0028] The beneficial effect is that by placing the test container horizontally and using the drop-coating operation, the emulsion explosive sample can completely cover the effective detection area of ​​the first electrode, laying the foundation for subsequent oil film formation.

[0029] By pressing the sample with the weight of the second electrode, the target oil film thickness can be made uniform, avoiding the problem of uneven oil film thickness caused by artificial pressure.

[0030] Allowing the target oil film to stand still allows the contact interface between the oil film and the electrode to reach a stable state, ensuring the stability of subsequent electrical contact and the accuracy of testing.

[0031] Standardized sample handling procedures reduce human interference with oil film formation and improve the repeatability and consistency of test data.

[0032] S2. Apply an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response; In this embodiment of the invention, an AC voltage signal is applied to the first electrode and the second electrode to excite the target oil film to generate a polarization response, specifically including: When the contact interface reaches a stable state, set the initial frequency, termination frequency, and number of sweep points of the AC voltage signal. Following the sequence from the initial frequency to the termination frequency, at the frequency corresponding to the number of sweep points, a sinusoidal AC voltage with constant amplitude is applied to the first electrode and the second electrode. The sinusoidal AC voltage drives the charge carriers in the target oil film to undergo displacement polarization and interfacial polarization.

[0033] After the contact interface between the target oil film and the first and second electrodes reaches a stable state, the applied AC voltage signal is configured to determine the initial frequency at which the AC voltage signal is applied, the termination frequency at which the application is stopped, and the number of sweep points included in the frequency change process.

[0034] Based on the configured initial frequency, termination frequency, and number of sweep points, the frequency is switched sequentially from the initial frequency to the termination frequency. At each frequency point determined by the number of sweep points, a sinusoidal AC voltage with a constant amplitude is applied between the first electrode and the second electrode.

[0035] An alternating electric field is formed by applying a sinusoidal alternating voltage between the first and second electrodes. The alternating electric field acts on the target oil film, driving the charge carriers inside the target oil film to move in a directional manner to form displacement polarization. At the same time, it drives the charge at different phase interfaces inside the target oil film to accumulate and form interface polarization.

[0036] The beneficial effect is that the AC voltage parameters are configured only after the contact interface has stabilized, which avoids interference from interface instability on the polarization response and ensures the effectiveness of subsequent polarization tests.

[0037] Standardize the frequency parameters and sweep rules of AC voltage to make the polarization excitation process more standardized and improve the repeatability of test data.

[0038] Applying a sinusoidal alternating voltage with constant amplitude can create a stable alternating electric field, providing uniform and controllable excitation conditions for the polarization of charge carriers within the oil film.

[0039] By driving charge carriers to generate displacement polarization and interface polarization through alternating electric fields, the interfacial properties of the oil film can be excited at the microscopic level, providing a physical basis for subsequent capture of oil film impedance response data.

[0040] S3. During the duration of applying the AC voltage signal, acquire dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency to obtain the impedance response dataset of the target oil film. In this embodiment of the invention, during the duration of the applied AC voltage signal, dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency are collected to obtain the impedance response dataset of the target oil film, specifically including: During the duration of the applied AC voltage signal, the displacement polarization and interfacial polarization of the target oil film are determined; Based on the displacement polarization and the interface polarization, the amplitude and phase of the response current signal of the target oil film are simultaneously acquired; Based on the amplitude of the sinusoidal AC voltage, the amplitude and phase of the response current signal are vector-decoupled to obtain the impedance modulus of the target oil film under the change of excitation frequency. The phase angle of the target oil film is determined based on the phase shift of the response current signal relative to the sinusoidal AC voltage. The impedance modulus and the phase angle are associated and stored to obtain the impedance response dataset of the target oil film.

[0041] Throughout the entire duration of the applied AC voltage signal, the target oil film is continuously subjected to displacement polarization and interfacial polarization.

[0042] Based on the current displacement polarization and interface polarization state of the target oil film, the amplitude and phase of the response current signal generated by the target oil film under the action of the alternating electric field are simultaneously acquired.

[0043] Using the amplitude of the applied sinusoidal AC voltage as a reference, the amplitude and phase of the acquired response current signal are decomposed and separated in vector form. The impedance modulus of the target oil film under the corresponding excitation frequency change is obtained through the vector relationship between voltage and current.

[0044] By comparing the phase difference between the response current signal and the sinusoidal AC voltage, the phase angle of the target oil film at the corresponding excitation frequency is determined based on this difference.

[0045] The impedance modulus and phase angle corresponding to each excitation frequency are stored one by one in frequency order to form a complete data set, thus obtaining the impedance response dataset of the target oil film.

[0046] The beneficial effect is that it can determine the polarization state of the oil film in real time, providing a reliable state basis for accurately acquiring the response current signal.

[0047] The amplitude and phase of the response current are acquired synchronously to fully capture the electrical signal response characteristics of the oil film under an alternating electric field.

[0048] The impedance modulus is obtained by vector decoupling, enabling accurate quantitative calculation of the oil film impedance characteristics.

[0049] The phase angle is determined based on the phase offset, which improves the parameter dimensions of the complex impedance of the oil film and ensures the integrity of the impedance data.

[0050] The impedance modulus is associated with the phase angle and stored to form a standardized impedance response dataset, laying the data foundation for subsequent data analysis.

[0051] S4. Decouple the imaginary capacitance component of the target oil film from the impedance response data set, and construct the imaginary capacitance frequency response spectrum of the target oil film with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. In this embodiment of the invention, the imaginary capacitance component of the target oil film is decoupled from the impedance response dataset, and the imaginary capacitance frequency response spectrum of the target oil film is constructed with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. Specifically, this includes: Frequency domain decoupling is performed on the impedance response dataset to obtain the imaginary capacitance component of the target oil film; The excitation frequency change is plotted on the horizontal axis, and the imaginary capacitance component is plotted on the vertical axis. In a two-dimensional coordinate system, the horizontal and vertical coordinates are reconstructed to obtain the imaginary capacitance frequency response spectrum of the target oil film.

[0052] The impedance response dataset is subjected to component separation processing in the frequency domain, and the imaginary part related to capacitance characteristics is extracted separately to obtain the imaginary capacitance component of the target oil film.

[0053] The sequence of excitation frequency changes is set as the horizontal axis of a two-dimensional coordinate system, and the imaginary capacitance component corresponding to each excitation frequency is set as the vertical axis of the two-dimensional coordinate system.

[0054] Based on the one-to-one correspondence between the excitation frequency and the imaginary capacitance component, the position of each data point is determined sequentially in the two-dimensional coordinate system, and the data points are connected in an orderly manner to complete the conversion of coordinate data into a visualization graphic, thereby obtaining the frequency response spectrum of the imaginary capacitance of the target oil film.

[0055] The beneficial effect is that frequency domain decoupling of the impedance response dataset can accurately extract the imaginary capacitance component of the oil film, remove irrelevant data interference, and focus on the core capacitance characteristics of the oil film.

[0056] By establishing a standardized coordinate mapping relationship with the excitation frequency as the horizontal axis and the imaginary capacitance component as the vertical axis, the variation law of oil film capacitance characteristics with frequency is made more intuitive.

[0057] The spectrum reconstruction is completed in a two-dimensional coordinate system, transforming abstract capacitance frequency data into a visual spectrum, which facilitates intuitive analysis and feature identification of oil film characteristics in the future.

[0058] The standardized operations of frequency domain decoupling and spectrum construction ensure the standardization of capacitor frequency response data processing and improve the accuracy and reliability of subsequent feature extraction.

[0059] S5. Perform relaxation peak feature identification on the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film; In this embodiment of the invention, relaxation peak feature identification is performed on the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film, specifically including: The frequency response spectrum of the imaginary capacitance is smoothed and denoised to obtain the processed spectrum curve of the target oil film. Identify the local maxima points appearing in the processed spectrum curve and define the local maxima points as relaxation peaks; Extract the frequency value corresponding to the relaxation peak, and use the frequency value as the first interface relaxation feature value of the target oil film; The half-peak width of the relaxation peak is extracted, and the half-peak width is used as the second interface relaxation characteristic value of the target oil film. The first interface relaxation feature value and the second interface relaxation feature value are integrated into the interface relaxation feature value of the target oil film.

[0060] The curve data on the frequency response spectrum of the imaginary capacitance is continuously smoothed to remove fluctuation interference points in the curve, so that the curve trend remains continuous and stable without abrupt jumps, and the processed spectrum curve of the target oil film is obtained.

[0061] After traversing all data points of the processed spectrum curve, the data points with larger values ​​than the adjacent data points and exhibiting a convex shape are identified as local maxima, and these local maxima are defined as relaxation peaks.

[0062] Read the horizontal coordinate value corresponding to the relaxation peak in the two-dimensional coordinate system. This horizontal coordinate value is the frequency value corresponding to the relaxation peak. Use this frequency value as the first interface relaxation characteristic value of the target oil film.

[0063] Find the position on both sides of the curve where the value is equal to half the value of the peak. Determine the lateral width between the two positions. Use this width as the half-peak width of the relaxation peak and use this half-peak width as the second interface relaxation characteristic value of the target oil film.

[0064] The relaxation feature values ​​of the first interface and the relaxation feature values ​​of the second interface are combined according to their corresponding relationship to form a complete set of feature parameters. After integration, the interface relaxation feature values ​​of the target oil film are obtained.

[0065] The beneficial effect is that smoothing and denoising the graph can eliminate fluctuations in the curve, making the graph curve trend more stable and improving the accuracy of feature recognition.

[0066] Accurately identify local maxima and define them as relaxation peaks to determine the core analysis object for subsequent extraction of relaxation feature values ​​of the oil film interface.

[0067] The frequency value corresponding to the relaxation peak is extracted as the first feature value to capture the core frequency characteristics of oil film interface relaxation and provide key parameters for stability determination.

[0068] The half-peak width of the relaxation peak is extracted as the second feature value to reflect the uniformity of the oil film interface and enrich the quantitative dimensions of stability determination.

[0069] By integrating the relaxation features of the two interfaces, a complete set of feature parameters is formed, providing comprehensive data support for the accurate comparison and determination of oil film stability.

[0070] S6. Compare the interface relaxation feature value with the preset standard feature value, and determine the stability of the target oil film based on the comparison result.

[0071] In this embodiment of the invention, the interface relaxation feature value is compared with a preset standard feature value, and the stability of the target oil film is determined based on the comparison result, specifically including: The interface relaxation feature value is compared with a preset standard feature value. The interface relaxation feature value includes the first interface relaxation feature value and the second interface relaxation feature value. The preset standard feature value includes a standard relaxation frequency range and a standard half-peak width threshold. When the first interface relaxation feature value falls within the standard relaxation frequency range, it is determined that the interface relaxation behavior of the target oil film conforms to the standard. When the second interface relaxation eigenvalue is greater than the standard half-peak width threshold, the interface uniformity of the target oil film is determined to meet the standard. If both the interface relaxation behavior and the interface uniformity meet the standard, then the stability of the target oil film is determined to be qualified.

[0072] The interface relaxation feature value, which includes the first interface relaxation feature value and the second interface relaxation feature value, is compared one by one with the preset standard feature value, which includes the standard relaxation frequency range and the standard half-peak width threshold.

[0073] Determine whether the relaxation characteristic value of the first interface is within the standard relaxation frequency range. When the relaxation characteristic value of the first interface falls within the standard relaxation frequency range, the interface relaxation behavior of the target oil film is determined to meet the standard.

[0074] Determine the relationship between the relaxation eigenvalue of the second interface and the standard half-peak width threshold. When the relaxation eigenvalue of the second interface is greater than the standard half-peak width threshold, the interface uniformity of the target oil film is determined to meet the standard.

[0075] Simultaneously confirming that both the interfacial relaxation behavior and interfacial uniformity of the target oil film meet the standard, the stability of the target oil film is determined to be qualified when both conditions are met.

[0076] The beneficial effect is that by comparing the interface relaxation characteristic values ​​with the preset standard characteristic values, the determination of oil film stability has a clear quantitative reference.

[0077] The interface relaxation behavior is determined by the first feature value to accurately capture whether the interface relaxation characteristics of the oil film core meet the requirements.

[0078] The second eigenvalue is used to determine whether the interface uniformity meets the standard, thus supplementing the judgment condition for oil film stability from the dimension of interface uniformity.

[0079] By setting a criterion that requires both conditions to be met simultaneously, a comprehensive oil film stability assessment system is constructed to improve the accuracy and reliability of the assessment results.

[0080] The standardized comparison and judgment process ensures that the oil film stability test results are consistent and repeatable, meeting the needs of industrial batch testing.

[0081] Example 2: Furthermore, the present invention provides an emulsion explosive oil film stability testing system, employing an emulsion explosive oil film stability testing method from the above embodiments, which can solve a technical problem in testing the stability of emulsion explosive oil films. The beneficial effects of the emulsion explosive oil film stability testing system provided by the present invention are the same as those of the emulsion explosive oil film stability testing method provided in the above embodiments, and other technical features of the emulsion explosive oil film stability testing system are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0082] Example 3: This invention provides a device for testing the stability of emulsion explosive oil film. Please refer to... Figure 2An emulsion explosive oil film stability testing device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform an emulsion explosive oil film stability testing method as described in Embodiment 1 above. An emulsion explosive oil film stability testing device in this embodiment may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), vehicle terminals (e.g., vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. An emulsion explosive oil film stability testing device is merely an example and should not impose any limitations on the functionality and scope of use of this embodiment. An emulsion explosive oil film stability testing device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory 1002 or a program loaded from a storage device 1003 into a random access memory 1004. Random access memory 1004 also stores various programs and data required for the operation of an emulsion explosive oil film stability testing device. Processing device 1001, read-only memory 1002, and random access memory 1004 are interconnected via bus 1005. I / O interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows an emulsion explosive oil film stability testing device to communicate wirelessly or wiredly with other devices to exchange data. Although an emulsion explosive oil film stability testing device with various systems is shown in the figure, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented or possessed alternatively.

[0083] Example 4: This invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method for testing the stability of an emulsion explosive oil film. The computer program product provided by this invention can solve a technical problem related to testing the stability of an emulsion explosive oil film. Compared with the prior art, the beneficial effects of the computer program product provided by this invention are the same as those of the method for testing the stability of an emulsion explosive oil film provided in the above embodiments, and will not be repeated here.

[0084] In particular, according to the embodiments disclosed in this invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this invention.

[0085] It should be understood that the various parts disclosed in this invention can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0086] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for testing the stability of an oil film in an emulsion explosive, characterized in that, The methods include: S1. Place the emulsion explosive sample between the first electrode and the second electrode in the test container to obtain the target oil film of the emulsion explosive sample, so that the target oil film forms an electrical contact with the first electrode and the second electrode; S2. Apply an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response; S3. During the duration of applying the AC voltage signal, acquire dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency to obtain the impedance response dataset of the target oil film. S4. Decouple the imaginary capacitance component of the target oil film from the impedance response data set, and construct the imaginary capacitance frequency response spectrum of the target oil film with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. S5. Perform relaxation peak feature identification on the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film; S6. Compare the interface relaxation feature value with the preset standard feature value, and determine the stability of the target oil film based on the comparison result.

2. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, The emulsion explosive sample is placed between the first and second electrodes within a test container to obtain a target oil film on the emulsion explosive sample. This target oil film then forms electrical contact with the first and second electrodes, specifically including: The test container is placed horizontally, and an emulsion explosive sample is dropped onto the first electrode of the test container. The second electrode of the test container is slowly placed over the emulsion explosive sample, and the emulsion explosive sample is pressed into a target oil film of uniform thickness by the weight of the second electrode. Allow the target oil film to stand until the contact interface between the target oil film and the first electrode and the second electrode reaches a stable state.

3. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, Applying an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response, specifically including: When the contact interface reaches a stable state, set the initial frequency, termination frequency, and number of sweep points of the AC voltage signal. Following the sequence from the initial frequency to the termination frequency, at the frequency corresponding to the number of sweep points, a sinusoidal AC voltage with constant amplitude is applied to the first electrode and the second electrode. The sinusoidal AC voltage drives the charge carriers in the target oil film to undergo displacement polarization and interfacial polarization.

4. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, During the duration of the applied AC voltage signal, dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency are acquired to obtain the impedance response dataset of the target oil film, specifically including: During the duration of the applied AC voltage signal, the displacement polarization and interfacial polarization of the target oil film are determined; Based on the displacement polarization and the interface polarization, the amplitude and phase of the response current signal of the target oil film are simultaneously acquired; Based on the amplitude of the sinusoidal AC voltage, the amplitude and phase of the response current signal are vector-decoupled to obtain the impedance modulus of the target oil film under the change of excitation frequency. The phase angle of the target oil film is determined based on the phase shift of the response current signal relative to the sinusoidal AC voltage. The impedance modulus and the phase angle are associated and stored to obtain the impedance response dataset of the target oil film.

5. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, The imaginary capacitance component of the target oil film is decoupled from the impedance response dataset. A frequency response spectrum of the imaginary capacitance of the target oil film is constructed with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. Specifically, this includes: Frequency domain decoupling is performed on the impedance response dataset to obtain the imaginary capacitance component of the target oil film; The excitation frequency change is plotted on the horizontal axis, and the imaginary capacitance component is plotted on the vertical axis. In a two-dimensional coordinate system, the horizontal and vertical coordinates are reconstructed to obtain the imaginary capacitance frequency response spectrum of the target oil film.

6. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, The relaxation peak feature of the imaginary capacitance frequency response spectrum is identified to obtain the interface relaxation feature value of the target oil film, specifically including: The frequency response spectrum of the imaginary capacitance is smoothed and denoised to obtain the processed spectrum curve of the target oil film. Identify the local maxima points appearing in the processed spectrum curve and define the local maxima points as relaxation peaks; Extract the frequency value corresponding to the relaxation peak, and use the frequency value as the first interface relaxation feature value of the target oil film; The half-peak width of the relaxation peak is extracted, and the half-peak width is used as the second interface relaxation characteristic value of the target oil film. The first interface relaxation feature value and the second interface relaxation feature value are integrated into the interface relaxation feature value of the target oil film.

7. The method for testing the stability of an emulsion explosive oil film as described in claim 1, characterized in that, The interface relaxation feature value is compared with a preset standard feature value, and the stability of the target oil film is determined based on the comparison result. Specifically, this includes: The interface relaxation feature value is compared with a preset standard feature value. The interface relaxation feature value includes the first interface relaxation feature value and the second interface relaxation feature value. The preset standard feature value includes a standard relaxation frequency range and a standard half-peak width threshold. When the first interface relaxation feature value falls within the standard relaxation frequency range, it is determined that the interface relaxation behavior of the target oil film conforms to the standard. When the second interface relaxation eigenvalue is greater than the standard half-peak width threshold, the interface uniformity of the target oil film is determined to meet the standard. If both the interface relaxation behavior and the interface uniformity meet the standard, then the stability of the target oil film is determined to be qualified.

8. A system for testing the stability of an emulsion explosive oil film, applied to the method for testing the stability of an emulsion explosive oil film according to any one of claims 1 to 7, characterized in that, The emulsion explosive oil film stability testing system includes: An electrode contact module is used to place an emulsion explosive sample between a first electrode and a second electrode inside a test container to obtain a target oil film of the emulsion explosive sample, thereby making electrical contact between the target oil film and the first electrode and the second electrode. A polarization response module is used to apply an AC voltage signal to the first electrode and the second electrode to excite the target oil film to generate a polarization response; The frequency variation module is used to acquire dynamic response data of the complex impedance of the target oil film as a function of the excitation frequency during the duration of the applied AC voltage signal, and obtain the impedance response dataset of the target oil film. The spectrum construction module is used to decouple the imaginary capacitance component of the target oil film from the impedance response dataset, and construct the imaginary capacitance frequency response spectrum of the target oil film with the excitation frequency change as the horizontal axis and the imaginary capacitance component as the vertical axis. The feature recognition module is used to identify the relaxation peak features of the frequency response spectrum of the imaginary capacitance to obtain the interface relaxation feature value of the target oil film. A stable output module is used to compare the interface relaxation feature value with a preset standard feature value, and determine the stability of the target oil film based on the comparison result.

9. A device for testing the stability of an emulsion explosive oil film, characterized in that, The emulsion explosive oil film stability testing device includes: a memory, a processor, and an emulsion explosive oil film stability testing program stored in the memory and executable on the processor. When the emulsion explosive oil film stability testing program is executed by the processor, it implements an emulsion explosive oil film stability testing method according to any one of claims 1 to 7.

10. A computer program product, characterized in that, The computer program product includes an emulsion explosive oil film stability testing program, which, when executed by a processor, implements an emulsion explosive oil film stability testing method according to any one of claims 1 to 7.

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