Liquid level shape detection system

Abstract

The application provides a liquid level shape detection system in a storage tank, comprising a storage tank, an ultrasonic transducer assembly and a data processing assembly; the ultrasonic transducer assembly is sleeved on the storage tank and is in communication connection with the data processing assembly; the ultrasonic transducer assembly can emit ultrasonic signals to the liquid level in the storage tank and can receive reflected ultrasonic signals reflected by the liquid level; the data processing assembly can obtain a waveform diagram of the emitted ultrasonic signals and can obtain a waveform diagram of the reflected ultrasonic signals. Compared with traditional liquid level measurement technologies such as optical window monitoring, bookkeeping method, gas law method, gas injection method and volume excitation method, the application adopts ultrasonic transducer array technology (the array technology herein refers to the way of adopting multiple ultrasonic transducers) to significantly improve the test speed and the data acquisition efficiency due to the simplicity of the structure and the convenience of the operation.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and in particular to a liquid level detection system in a storage tank. Background Technology

[0002] In the aerospace field, the storage, management, and delivery of propellants are always crucial aspects of rocket and satellite engine design and application. On Earth, under the influence of gravity, the liquid in the propellant tank is relatively stable, with a generally level and stable surface that doesn't change significantly over time. However, in the actual application of propellant tanks in rockets, satellites, and other spacecraft, the tanks operate in the microgravity environment of space. In this environment, the liquid propellant floats freely due to the lower gravity. Even slight maneuvers by the spacecraft can cause acceleration in the direction of the maneuver, but because gravity is so weak, the liquid propellant has almost no static inertia compared to its ground-based state, causing it to float freely within the tank. This directly leads to a disruption in the continuous supply of liquid propellant during delivery. Fuel shortages are fatal for operating engines, potentially causing engine burn-out, damage, or even explosions, resulting in severe consequences. Furthermore, the floating nature of the liquid propellant makes it difficult to measure the remaining amount in the tank, making it impossible to accurately determine the amount of propellant remaining.

[0003] Currently, some devices exist for measuring liquid level height. These devices mostly rely on floating level gauges, laser ranging, and ultrasonic ranging, providing only information on liquid level height with relatively low accuracy. Effective technical means for measuring liquid surface morphology are lacking. This makes it difficult for spacecraft to accurately determine the actual state of propellant within tanks during operation, and even more difficult to precisely measure liquid level height and determine propellant reserves.

[0004] Therefore, there is an urgent need for a liquid level detection system in a storage tank to solve the technical problems existing in the current technology to a certain extent. Summary of the Invention

[0005] The purpose of this application is to provide a liquid level morphology detection system in a storage tank, which can improve the testing speed and the accuracy of data acquisition to a certain extent.

[0006] This application provides a liquid level morphology detection system in a storage tank, including a storage tank, an ultrasonic transducer assembly, and a data processing assembly;

[0007] The ultrasonic transducer assembly is fitted onto the storage tank and is communicatively connected to the data processing assembly.

[0008] The ultrasonic transducer assembly can emit ultrasonic signals to the liquid surface in the tank and can receive reflected ultrasonic signals reflected back from the liquid surface.

[0009] The data processing component is capable of acquiring the waveform of the emitted ultrasonic signal and the waveform of the reflected ultrasonic signal.

[0010] In the above technical solution, the ultrasonic transducer assembly further includes a fixing ring and an ultrasonic transducer.

[0011] The fixing ring is sleeved on the storage tank, and a plurality of equally spaced fixing positions are formed on the fixing ring;

[0012] Multiple ultrasonic transducers are provided, and each of the multiple ultrasonic transducers corresponds one-to-one with a multiple of the fixed positions, which are used to fix the ultrasonic transducers to the storage tank.

[0013] In the above technical solution, one of the multiple ultrasonic transducers is able to transmit a signal, and the other ultrasonic transducers are able to receive the signal, so that the multiple ultrasonic transducers form a one-to-many transmission and multiple-to-receive mode.

[0014] In the above technical solution, the gas-liquid interface monitoring system in the storage tank further includes a moving component;

[0015] The moving component includes a clamping part and a guide rail part parallel to the axis of the tank;

[0016] One end of the clamping part is slidably disposed on the guide rail part, and the other end is clamped on the fixing ring. The clamping part can move along the axial direction of the storage tank on the guide rail part, thereby driving the fixing ring to move along the axial direction of the storage tank, so as to adjust the position of the ultrasonic transducer on the storage tank.

[0017] Furthermore, in the above technical solution, the gas-liquid interface monitoring system in the storage tank also includes a camera component;

[0018] The shooting assembly includes three cameras, the shooting ends of which are all facing the storage tank and arranged in a spatial rectangular coordinate system;

[0019] The camera is capable of capturing images of the liquid surface morphology within the storage tank.

[0020] In the above technical solution, the data processing component further includes a data processing instrument and a display instrument communicatively connected to the data processing instrument;

[0021] The data processing instrument is communicatively connected to the ultrasonic transducer assembly and the imaging assembly, respectively, so that the liquid surface morphology obtained by the data processing instrument from the imaging assembly can be transmitted to the display instrument, and the waveforms of the emitted ultrasonic signal and the reflected ultrasonic signal obtained by the data processing instrument from the ultrasonic transducer assembly can be transmitted to the display instrument.

[0022] In the above technical solution, further, based on the transmitted ultrasonic signal and the reflected ultrasonic signal, a cross-correlation algorithm is used to determine the correlation degree R between the transmitted ultrasonic signal and the reflected ultrasonic signal. xy (τ), as shown in formula (1):

[0023]

[0024] According to R xy (τ) Determine the location of the maximum value k of the reflected ultrasonic signal, as shown in formula (2):

[0025] k = argmax(R) xy (k)) (2);

[0026] Calculate the time offset based on the k value. As shown in formula (3):

[0027]

[0028] According to the delay Calculate the distance L from the ultrasonic transducer to the liquid surface, as shown in formula (4):

[0029]

[0030] Where x(t) and y(t) represent the values ​​of the transmitted and reflected ultrasonic signals at time t, respectively; k represents the displacement of the sliding window, and T s Indicates the sampling period. R represents the time offset. xy (τ) represents the correlation function.

[0031] Compared with the prior art, the beneficial effects of this application are as follows:

[0032] This application provides a liquid level morphology detection system in a storage tank, including a storage tank, an ultrasonic transducer assembly, and a data processing assembly;

[0033] The ultrasonic transducer assembly is fitted onto the storage tank and is communicatively connected to the data processing assembly.

[0034] The ultrasonic transducer assembly can emit ultrasonic signals to the liquid surface in the tank and can receive reflected ultrasonic signals reflected back from the liquid surface.

[0035] The data processing component is capable of acquiring the waveform of the emitted ultrasonic signal and the waveform of the reflected ultrasonic signal.

[0036] In summary, compared with traditional liquid level measurement techniques such as optical window monitoring, bookkeeping method, gas law method, gas injection method, and volume excitation method, this application adopts ultrasonic transducer array technology (where array technology refers to the use of multiple ultrasonic transducers) which significantly improves the testing speed and data acquisition efficiency due to its simple structure and convenient operation. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the liquid level morphology detection system in the tank provided in this application;

[0039] Figure 2 The pulse waveform diagram of the No. 1 ultrasonic transducer in the liquid level morphology detection system in the tank provided in this application;

[0040] Figure 3 The pulse waveform diagram of the No. 2 ultrasonic receiving transducer in the liquid level morphology detection system in the tank provided in this application;

[0041] Figure 4 The pulse waveform diagram of the No. 3 ultrasonic receiving transducer in the liquid level morphology detection system in the tank provided in this application;

[0042] Figure 5 Four typical liquid level morphologies in the engine tank provided in this application.

[0043] Reference numerals in the attached figures: 1-ultrasonic transducer; 2-tank under test; 3-guide rail; 4-clamping part; 5-camera; 6-fixing ring. Detailed Implementation

[0044] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0045] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0046] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0047] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0048] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0049] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0050] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0051] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0052] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0053] The following is combined Figures 1-5 This application provides a detailed description of a liquid level morphology detection system for a storage tank 2.

[0054] In this embodiment, the liquid level morphology detection system in the tank 2 includes the tank 2, the ultrasonic transducer 1 assembly, and the data processing assembly.

[0055] Specifically, the ultrasonic transducer 1 assembly is fitted onto the storage tank 2 and is communicatively connected to the data processing assembly. Further, the ultrasonic transducer 1 assembly includes a fixing ring 6 and an ultrasonic transducer 1; wherein the fixing ring 6 is annular, fitted onto the storage tank 2, and has multiple equally spaced fixing positions; further, multiple ultrasonic transducers 1 are provided, with each ultrasonic transducer 1 corresponding to one of the multiple fixing positions, thus achieving the fixation of the ultrasonic transducer 1 onto the storage tank 2 using the fixing positions.

[0056] Specifically, one of the multiple ultrasonic transducers 1 is used to transmit ultrasonic signals to the liquid surface in the storage tank 2 as an ultrasonic transmitting transducer, while the remaining ultrasonic transducers 1 are used to receive reflected ultrasonic signals from the liquid surface as ultrasonic receiving transducers, thus forming a one-to-many transmission and multiple-to-reception mode. Preferably, a total of 16 ultrasonic transducers 1 are provided, and they are sequentially numbered as ultrasonic transducer 1, ultrasonic transducer 2, ultrasonic transducer 3... ultrasonic transducer 16. In actual use, ultrasonic transducer 1 can be used as an ultrasonic transmitting transducer, and the remaining 15 ultrasonic transducers 1 can be used as ultrasonic receiving transducers. Alternatively, ultrasonic transducer 2 can be used as an ultrasonic transmitting transducer, and the remaining 15 ultrasonic transducers 1 can be used as ultrasonic receiving transducers.

[0057] Specifically, the data processing component includes a data processing instrument and a display instrument communicatively connected to the data processing instrument; wherein the data processing instrument is communicatively connected to the ultrasonic transducer 1 and can display the waveform of the signal emitted or received by the ultrasonic transducer 1 on the display instrument; furthermore, the data processing instrument can acquire the waveform of the ultrasonic wave emitted by the first ultrasonic transducer 1 and can acquire the waveform of the reflected ultrasonic wave signal received by the remaining 15 ultrasonic receiving transducers respectively. Preferably, the data processing instrument is a CPU or PLC; the display instrument is a display screen.

[0058] In this embodiment, combined with Figure 1 As shown, the gas-liquid interface monitoring system in tank 2 also includes a moving component.

[0059] Specifically, the moving component includes a clamping part 4 and a guide rail part 3 parallel to the axis of the storage tank 2;

[0060] Furthermore, one end of the clamping part 4 is slidably disposed on the guide rail part 3, and the other end is clamped on the fixing ring 6. The clamping part 4 can move along the axial direction of the storage tank 2 on the guide rail part 3, thereby driving the fixing ring 6 to move along the axial direction of the storage tank 2, so as to adjust the position of the ultrasonic transducer 1 on the storage tank 2.

[0061] Furthermore, the clamping part 4 can be a clamp, such as a clip, to ensure that it can hold the fixing ring 6; the guide rail part 3 is a support rod, and a slide rail extending along the axis of the storage tank 2 is provided on the side of the support rod facing the clamping part 4, so that the clamping part 4 can slide on the support plate along the axis of the storage tank 2.

[0062] The following example uses three ultrasonic transducers (Ultrasonic transducer 1, ultrasonic transducer 2, and ultrasonic transducer 3, with ultrasonic transducer 1 serving as the ultrasonic transmitting transducer and ultrasonic transducer 2 and ultrasonic transducer 3 serving as the ultrasonic receiving transducers) to illustrate in detail how to obtain the morphology of the liquid surface in tank 2 using this application.

[0063] Assuming that ultrasonic transducers 1 are distributed on the wall of tank 2 with different numbers and densities, transducers at different locations can detect the liquid level at different locations. The ultrasonic signal emitted by the ultrasonic transducer 1 has negligible attenuation in the liquid environment. When the ultrasonic wave is transmitted to the liquid surface, due to the significant acoustic impedance difference between the gas and the liquid, some of the ultrasonic waves will pass through the liquid surface and propagate into the gas; these sound waves are called transmitted sound waves. The rest of the ultrasonic waves will be reflected back through this interface and received again by the ultrasonic transducer 1; this part of the ultrasonic signal is called the reflected signal.

[0064] There is a linear relationship between the time difference between the ultrasonic signal emitted by the transducer and the reflected signal received, and the liquid surface level. This linear relationship is specifically measured by the method where ultrasonic transducer 1 emits an ultrasonic signal. Since the signal is reflected at the gas-liquid interface, ultrasonic transducers 1 and 3 can receive the corresponding reflected signals. However, due to the relatively complex interface, the sound propagation in tank 2 is not limited to a single direction. The sound signal can be reflected and transmitted back and forth in the propellant liquid and gas within tank 2, thus ultrasonic transducer 1 will receive many echo signals. Combined with... Figure 2 It is a pulse signal emitted by ultrasonic transducer 1. Figure 3 This is the pulse signal received by ultrasonic transducer 1 (number two). Figure 4 It is the pulse signal received by the No. 3 ultrasonic transducer 1 (both the transmitted and received pulse signals are acquired by the data processing instrument and transmitted to the display instrument).

[0065] By comparing the pulse signal received by ultrasonic transducer 1 No. 2 with the pulse signal emitted by ultrasonic transducer 1 No. 1, a cross-correlation algorithm is used to determine the correlation degree R between the ultrasonic signal emitted by ultrasonic transducer 1 No. 1 and the ultrasonic signal received by ultrasonic transducer 1 No. 2. xy (τ), as shown in formula (1):

[0066]

[0067] According to R xy (τ) Determine the location of the maximum value k of the reflected ultrasonic signal received by the second ultrasonic transducer 1, as shown in formula (2):

[0068] k = argmax(R) xy (k)) (2);

[0069] Calculate the time offset based on the k value. As shown in formula (3):

[0070]

[0071] According to the delay Calculate the distance L from the second ultrasonic transducer 1 to the liquid surface (i.e., at this point, the first point on the liquid surface can be determined), as shown in formula (4):

[0072]

[0073] Where x(t) and y(t) represent the values ​​of the transmitted and reflected ultrasonic signals at time t, respectively; k represents the displacement of the sliding window, and T s Indicates the sampling period. R represents the time offset. xy (τ) represents the correlation function, and V is the propagation speed of ultrasound in the liquid.

[0074] Similarly, the distance L from ultrasonic transducer 1 to the liquid surface can be calculated using the signal data from ultrasonic transducer 1 (i.e., the second point on the liquid surface can be determined at this point). The curve formed by the first and second points represents the shape of the liquid surface. For ease of explanation, the above description uses three ultrasonic transducers 1 as an example. In actual use, as described above, it is preferable to use 16 ultrasonic transducers 1. The more ultrasonic transducers 1 there are, the more accurate the measured liquid surface shape will be.

[0075] It is worth noting that the above-mentioned ultrasonic transducer 1, which is an ultrasonic transmitting transducer, and ultrasonic transducers 1, 2, and 3, which are ultrasonic receiving transducers, are not limited to this rule. Alternatively, ultrasonic transducer 1 can be an ultrasonic transmitting transducer, and ultrasonic transducers 1, 1, and 3 can be ultrasonic receiving transducers.

[0076] The above describes the linear relationship between the time difference between the ultrasonic signal emitted by the transducer and the received reflected signal, and the liquid surface being measured. Based on this linear relationship, the liquid surface position in the normal direction of the ultrasonic transducer 1 surface at a certain location can be directly determined, such as... Figure 5 As shown in (a) above. Furthermore, unlike lasers, the sound waves emitted by ultrasonic transducer 1 are not standard plane waves; their wavefronts have a certain angular distribution. That is, the ultrasonic signal emitted by ultrasonic transducer 1 at one location can be received by ultrasonic transducers 1 at other locations after being reflected by the liquid surface, such as... Figure 5 As shown in (b), this phenomenon creates a new acoustic measurement path, on which the signal is measured by reflection from another liquid surface measurement point. The propagation time along this path can also be used to determine the position of the liquid surface.

[0077] In a microgravity environment, some locations will be devoid of liquid, such as... Figure 5 As shown in (c), the ultrasonic transducer 1 will not receive the ultrasonic signal reflected back from the liquid surface, but may receive the reflection from the wall of the tank 2 at a greater distance. The propagation time of this ultrasonic wave is significantly different from the propagation time when there is a liquid surface, indicating that there is no liquid surface here.

[0078] Furthermore, situations such as total internal reflection may occur during the measurement process, such as... Figure 5 As shown in (d), because the direction of the incident ultrasonic wave and the sectional surface of the liquid surface have a certain specific angle, the ultrasonic signal is completely reflected in other directions. The ultrasonic transducer 1 installed at the bottom cannot receive the reflected signal at this time, and the measurement result needs to be compared with... Figure 5 The result is consistent with (c) in the figure, therefore an ultrasonic transducer 1 must be added to the side wall.

[0079] In conclusion, Figure 5 The four liquid level conditions are common situations that can occur during the actual operation of the storage tank 2, and can be accurately obtained through the liquid level morphology detection system in the storage tank 2 of this application.

[0080] In this embodiment, the gas-liquid interface monitoring system in tank 2 also includes a camera component.

[0081] Specifically, the imaging assembly includes three cameras 5, all with their imaging ends facing the storage tank 2 and arranged in a Cartesian coordinate system; the cameras 5 are capable of capturing the liquid surface morphology within the storage tank 2. Furthermore, the storage tank 2 is an acrylic glass tank 2, i.e., transparent, allowing the cameras 5 to capture the liquid surface morphology.

[0082] Furthermore, the data processing instrument is connected to the imaging component, and the data processing instrument can transmit the liquid surface pattern obtained from the imaging component to the display instrument.

[0083] Finally, the captured 3D results are compared with the ultrasonic measurement and processing results to verify whether the results of this application are correct.

[0084] In summary, compared with traditional liquid level measurement techniques such as optical window monitoring, bookkeeping method, gas law method, gas injection method, and volume excitation method, this application adopts ultrasonic transducer array technology (where array technology refers to the use of multiple ultrasonic transducers 1) which significantly improves the testing speed and data acquisition efficiency due to its simple structure and convenient operation.

[0085] To further improve the accuracy and reliability of the measurement results, this technology also incorporates the combined use of an acrylic glass tank 2 and a camera 5. This real-time imaging technology can not only independently monitor the liquid surface morphology, but also cross-validate the measurement data with the ultrasonic array, thereby accurately calibrating the measurement results. This dual verification mechanism greatly enhances the system's measurement capabilities and data authenticity, ensuring highly accurate and reliable measurement results.

[0086] In summary, this application constructs a comprehensive, efficient, and accurate liquid surface morphology measurement system through the effective combination of ultrasonic array technology, the plexiglass tank 2, and the imaging camera 5. This system is not only theoretically forward-looking but also demonstrates superior performance and broad adaptability in practical applications, providing solid technical support for the safe management and effective utilization of liquids. Particularly in high-tech fields such as aerospace, the application of this technology will greatly enhance the safety and efficiency of liquid storage and transportation.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A liquid level morphology detection system in a storage tank, characterized in that, Includes a storage tank, ultrasonic transducer assembly, and data processing assembly; The ultrasonic transducer assembly is fitted onto the storage tank and is communicatively connected to the data processing assembly. The ultrasonic transducer assembly can emit ultrasonic signals to the liquid surface in the tank and can receive reflected ultrasonic signals reflected back from the liquid surface. The data processing component is capable of acquiring the waveform of the emitted ultrasonic signal and the waveform of the reflected ultrasonic signal. The ultrasonic transducer assembly includes a fixed ring and an ultrasonic transducer. The fixing ring is sleeved on the storage tank, and a plurality of equally spaced fixing positions are formed on the fixing ring; Multiple ultrasonic transducers are provided, and each of the multiple ultrasonic transducers corresponds to a multiple of the fixed positions, which are used to fix the ultrasonic transducers to the storage tank. The gas-liquid interface monitoring system in the storage tank also includes a moving component; The moving component includes a clamping part and a guide rail part parallel to the axis of the tank; One end of the clamping part is slidably disposed on the guide rail part, and the other end is clamped on the fixing ring. The clamping part can move along the axial direction of the storage tank on the guide rail part to drive the fixing ring to move along the axial direction of the storage tank, so as to adjust the position of the ultrasonic transducer on the storage tank. Based on the transmitted ultrasonic signal and the reflected ultrasonic signal, a cross-correlation algorithm is used to determine the correlation between the transmitted ultrasonic signal and the reflected ultrasonic signal. As shown in formula (1): （1）； according to Determine the maximum value of the reflected ultrasonic signal The position of the value is shown in formula (2): （2）； according to Value calculation time offset As shown in formula (3): （3）； According to the delay Calculate the distance L from the ultrasonic transducer to the liquid surface, as shown in formula (4): （4）； Where, x( ) and y( The numbers ) represent the time intervals of the emitted and reflected ultrasonic signals, respectively. The value of ; k represents the displacement of the sliding window, Indicates the sampling period. Indicates the time offset. This represents the relevant function.

2. The liquid level morphology detection system in a storage tank according to claim 1, characterized in that, One of the multiple ultrasonic transducers is capable of emitting ultrasonic signals as an ultrasonic transmitting transducer, and the other ultrasonic transducers are capable of receiving ultrasonic signals as ultrasonic receiving transducers, so that the multiple ultrasonic transducers form a one-to-many transmission and multiple-to-receive mode.

3. The liquid level morphology detection system in a storage tank according to claim 1, characterized in that, The gas-liquid interface monitoring system in the storage tank also includes a camera module; The shooting assembly includes three cameras, the shooting ends of which are all facing the storage tank and arranged in a spatial rectangular coordinate system; The camera is capable of capturing images of the liquid surface morphology within the storage tank.

4. The liquid level morphology detection system in a storage tank according to claim 3, characterized in that, The data processing component includes a data processing instrument and a display instrument that is communicatively connected to the data processing instrument. The data processing instrument is communicatively connected to the ultrasonic transducer assembly and the imaging assembly, respectively, so that the liquid surface morphology obtained by the data processing instrument from the imaging assembly can be transmitted to the display instrument, and the waveforms of the emitted ultrasonic signal and the reflected ultrasonic signal obtained by the data processing instrument from the ultrasonic transducer assembly can be transmitted to the display instrument.

Images