A coating pipeline bubble detection device

Abstract

The utility model provides a kind of coating pipeline bubble detection device.The utility model provides the coating pipeline bubble detection device of being set on coating pipeline, including the ultrasonic detection module, data acquisition module and central processing module connected in turn;Ultrasonic detection module is used to send ultrasonic signal to coating pipeline, and the ultrasonic signal passing through coating pipeline is converted into first electric signal;Data acquisition module is used to collect first electric signal, and after first electric signal is converted into digital signal, it is sent to central processing module;Central processing module is used to judge whether there is bubble in coating pipeline according to digital signal.The slurry in coating pipeline is monitored in advance whether it contains bubble, bubble in slurry can be discharged in advance if found, to prevent the slurry with bubble into coating process, and the pole piece with bubble is coated, to realize the early monitoring and prevention of bubble problem in coating process, and improve the quality of coating process.

Description

Technical Field

[0001] This utility model relates to the field of battery testing, and in particular to a device for detecting air bubbles in coated pipes. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, the coating process is one of the core steps determining battery performance, and its quality directly affects the battery's electrochemical performance, safety, and cycle life. However, in actual coating production, the generation of air bubbles in the slurry is a common and difficult-to-complete technical problem.

[0003] To address the issue of air bubbles during the coating process, various bubble monitoring methods have been developed. These methods primarily rely on machine vision and sensor detection technologies to monitor the coating surface in real time during the coating process, identifying and determining the presence of air bubbles. However, these monitoring methods have significant limitations: First, existing methods monitor bubbles in the already formed coating during the coating process, which is a post-processing detection and cannot monitor the process before air is incorporated into the slurry. Second, due to the delayed monitoring, by the time bubbles are detected, the slurry containing air bubbles has already been coated. At this point, the problem can only be addressed through subsequent removal or repair processes, failing to prevent the problem from occurring in advance and making it difficult to fundamentally avoid the impact of air bubbles on coating quality. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting air bubbles in coated pipelines, so as to solve the technical problem of low coating quality caused by insufficient early monitoring and prevention of air bubble problems in the coating process in the existing technology.

[0005] The technical solution of this utility model is as follows: a device for detecting air bubbles in a coating pipeline is provided, which is installed on the coating pipeline and includes an ultrasonic detection module, a data acquisition module and a central processing module connected in sequence.

[0006] The ultrasonic detection module is used to send ultrasonic signals to the coating pipe and convert the ultrasonic signals passing through the coating pipe into a first electrical signal.

[0007] The data acquisition module is used to acquire the first electrical signal, convert the first electrical signal into a digital signal, and send it to the central processing module.

[0008] The central processing module is used to determine whether there are air bubbles in the coating pipeline based on the digital signal.

[0009] Preferably, the ultrasonic detection module includes a detection unit, which includes an ultrasonic transmitter, an ultrasonic transmitting transducer, an ultrasonic receiving transducer, and an ultrasonic receiver connected in sequence.

[0010] Preferably, the ultrasonic transmitting transducer and the ultrasonic receiving transducer are disposed opposite to each other on both sides of the coating pipe.

[0011] The ultrasonic transmitter is used to send a second electrical signal to the ultrasonic transducer, the ultrasonic transducer is used to convert the second electrical signal into a first ultrasonic signal, the ultrasonic transducer is used to receive the second ultrasonic signal generated after the first ultrasonic signal passes through the coating pipe, and the ultrasonic receiver is used to convert the second ultrasonic signal into a first electrical signal.

[0012] Preferably, the ultrasonic detection module includes multiple detection units.

[0013] Preferably, the data acquisition module includes a signal acquisition unit and a data storage unit that are interconnected;

[0014] The signal acquisition unit is used to acquire the first electrical signal and convert the first electrical signal into the digital signal, and the data storage unit is used to store the digital signal.

[0015] Preferably, the data acquisition module further includes a synchronization unit, which is connected to the data storage unit and is used to send a stop signal to the ultrasonic detection module after the storage space of the data storage unit is exhausted.

[0016] Preferably, the data acquisition module includes a high-speed A / D acquisition card.

[0017] Preferably, the ultrasonic detection module includes a filtering unit, which is used to amplify and filter the first electrical signal.

[0018] Preferably, the central processing module includes an oscilloscope for converting the digital signal into visual data.

[0019] Preferably, the device further includes an alarm module, which is used to issue an alarm signal when the central processing module determines that there are air bubbles in the coating pipe.

[0020] The beneficial effects of this invention are as follows: First, an ultrasonic detection module transmits ultrasonic signals to the coating pipeline, while simultaneously receiving the ultrasonic signals passing through the pipeline and converting them into a first electrical signal. Then, a data acquisition module collects the first electrical signal, converts it into a digital signal, and transmits it to the central processing module. Finally, the central processing module analyzes and determines whether air bubbles exist in the coating pipeline based on the received digital signal. This allows for early monitoring of whether the slurry in the coating pipeline contains air bubbles. If air bubbles are detected, the slurry containing air bubbles can be discharged in advance, preventing the slurry with air bubbles from entering the coating process and resulting in the coating of electrode sheets containing air bubbles. This achieves early monitoring and prevention of air bubble problems in the coating process, thereby improving the quality of the coating process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the coating pipe bubble detection device according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the ultrasonic detection module according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the detection unit of the ultrasonic detection module in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the data acquisition module in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the central processing module in an embodiment of the present invention.

[0026] Reference numerals: 100-Ultrasonic detection module; 110-Detection unit; 111-Ultrasonic transmitter; 112-Ultrasonic transmitting transducer; 113-Ultrasonic receiving transducer; 114-Ultrasonic receiver; 120-Filtering unit; 200-Data acquisition module; 210-Signal acquisition unit; 220-Data storage unit; 230-Synchronization unit; 300-Central processing module; 310-Data processing unit; 320-Oscilloscope; 400-Alarm module. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0030] Figure 1 This is a schematic diagram of the structure of the coating pipe bubble detection device according to an embodiment of the present invention. It should be noted that if substantially the same result is obtained, the embodiment of the present invention is not necessarily identical. Figure 1 The structures shown are limited. For example... Figure 1 As shown, the bubble detection device for coating pipelines is installed on the coating pipeline and includes an ultrasonic detection module 100, a data acquisition module 200, and a central processing module 300 connected in sequence. The ultrasonic detection module 100 is used to send ultrasonic signals to the coating pipeline and convert the ultrasonic signals passing through the coating pipeline into a first electrical signal. The data acquisition module 200 is used to acquire the first electrical signal and convert the first electrical signal into a digital signal before sending it to the central processing module 300. The central processing module 300 is used to determine whether there are bubbles in the coating pipeline based on the digital signal.

[0031] In this embodiment, the ultrasonic detection module 100 first initiates signal transmission and reception. When the device starts operating, the ultrasonic detection module 100, acting as a front-end sensing component, transmits ultrasonic signals into the coating pipe at a preset frequency and intensity. These ultrasonic signals pass through the pipe wall and the internal slurry. During propagation, if air bubbles are present in the pipe, the ultrasonic waves will be reflected, scattered, or attenuated due to the difference in acoustic impedance between the bubbles and the coating medium; if no air bubbles are present, the ultrasonic waves pass through the medium in a relatively stable state. Subsequently, the receiving unit of the ultrasonic detection module 100 captures the reflected or transmitted waves passing through the coating pipe and converts these physical forms of ultrasonic signals into corresponding first electrical signals (usually analog electrical signals), completing the initial signal conversion.

[0032] Next, the data acquisition module 200 performs signal processing and transmission. The data acquisition module 200 receives the analog electrical signal output from the ultrasonic detection module 100 in real time and converts the continuously changing analog electrical signal into a discrete digital signal through an internal analog-to-digital converter (ADC). This conversion process requires a high sampling rate and accuracy to fully preserve the bubble-related characteristic information in the ultrasonic signal (such as amplitude changes, propagation time differences, etc.). After conversion, the data acquisition module 200 stably transmits the digital signal to the central processing module 300 through a preset communication protocol, such as USB, Ethernet, or a dedicated interface, achieving seamless data transfer.

[0033] Finally, the central processing module 300 performs analysis and judgment. The central processing module 300 includes a data processing unit 310, which may include a central processing unit (CPU). After receiving the digital signal, the CPU performs in-depth analysis of the signal characteristics, comparing the real-time acquired digital signal with a preset bubble-free reference signal, focusing on identifying abnormal fluctuations in the signal, such as sudden drops in amplitude, frequency shifts, and pulse width changes. These anomalies are usually caused by interference from bubbles to the ultrasonic waves. If the analysis results show that the signal characteristics match the typical characteristics when bubbles are present, exceeding a set threshold, the central processing module 300 determines that bubbles exist in the coating pipeline and can issue a prompt through an external alarm device or display unit; if the threshold is not reached, it is determined to be a bubble-free state, and the device continues real-time monitoring.

[0034] The entire process forms a closed loop. The ultrasonic detection module 100 continuously transmits and receives signals, the data acquisition module 200 completes signal conversion and transmission in real time, and the central processing module 300 dynamically analyzes and judges the signals to ensure real-time and accurate detection of air bubbles in the coating pipeline. This allows for early monitoring of whether the slurry in the coating pipeline contains air bubbles. If air bubbles are detected, the slurry containing air bubbles can be discharged in advance to prevent it from entering the coating process and coating electrode sheets containing air bubbles. This achieves early monitoring and prevention of air bubble problems in the coating process, thereby improving the quality of the coating process.

[0035] In some embodiments, such as Figure 2 and Figure 3 As shown, the ultrasonic detection module 100 includes a detection unit 110, which includes an ultrasonic transmitter 111, an ultrasonic transmitting transducer 112, an ultrasonic receiving transducer 113, and an ultrasonic receiver 114 connected in sequence.

[0036] In this embodiment, when the device is running, the ultrasonic transmitter 111 in the detection unit 110 acts as a signal source, generating a first electrical signal of a specific frequency and intensity. This first electrical signal is the original command to drive the ultrasonic wave transmission. Subsequently, the ultrasonic transducer 112 receives the first electrical signal from the transmitter, converts electrical energy into mechanical energy through the piezoelectric effect, and generates and transmits ultrasonic signals into the coating pipe. These ultrasonic signals pass through the pipe wall and enter the coating medium inside. During propagation, if they encounter air bubbles, the ultrasonic waves will be significantly reflected and scattered because the acoustic impedance of the air bubbles is much lower than that of the liquid medium, and the transmitted energy will be greatly attenuated. If there are no air bubbles in the medium, the ultrasonic waves will propagate along a relatively stable path, and the energy attenuation will be more uniform.

[0037] Next, the ultrasonic receiving transducer 113 is responsible for capturing the transmitted waves passing through the coated pipe or the reflected waves reflected by the bubbles. Similarly, it converts these ultrasonic signals in the form of mechanical vibrations back into corresponding analog first electrical signals through the piezoelectric effect. At this time, the first electrical signal carries key information about whether there are bubbles in the medium. For example, a sudden drop in signal amplitude may correspond to the reflection attenuation of bubbles, and the shift in signal phase may be related to the scattering characteristics of bubbles.

[0038] In some embodiments, such as Figure 3 As shown, the ultrasonic transmitting transducer 112 and the ultrasonic receiving transducer 113 are disposed opposite each other on both sides of the coating pipe.

[0039] An ultrasonic transmitter is used to send a second electrical signal to an ultrasonic transducer, an ultrasonic transducer 112 is used to convert the second electrical signal into a first ultrasonic signal, an ultrasonic receiver 113 is used to receive the second ultrasonic signal generated after the first ultrasonic signal passes through the coating pipe, and an ultrasonic receiver 114 is used to convert the second ultrasonic signal into a first electrical signal.

[0040] In this embodiment, when the device is started, the ultrasonic transmitter acts as the initial signal source, generating a second electrical signal according to preset detection parameters, including detection frequency and signal strength. After receiving the second electrical signal, the ultrasonic transducer 112 converts electrical energy into mechanical energy based on the piezoelectric effect (or magnetostrictive effect, depending on the transducer type), generating mechanical vibration. This vibration propagates outward in the form of elastic waves, forming a first ultrasonic signal. When the first ultrasonic signal propagates in the coating medium, if it encounters a bubble, a complex interaction occurs due to the difference in acoustic impedance between the bubble and the medium: some energy is reflected by the bubble to form a reflected wave, some energy is scattered when passing through the bubble, and the remaining energy continues to propagate, but the transmitted energy is significantly attenuated; if there are no bubbles in the medium, the first ultrasonic signal propagates with relatively stable energy and direction, with uniform attenuation only due to the characteristics of the medium itself. Finally, the ultrasonic signal that passes through the entire pipe cross-section or returns after reflection is defined as the second ultrasonic signal, whose waveform, amplitude, and phase differ from the first ultrasonic signal, and the degree of difference is related to the size, number, and position of the bubbles. After the ultrasonic transducer 113 captures the second ultrasonic signal, it also converts the mechanical vibration into the first electrical signal through the piezoelectric effect, thus completing the secondary conversion from mechanical energy to electrical energy.

[0041] In one specific embodiment, the ultrasonic transmitting transducer 112 and the ultrasonic receiving transducer 113 can be installed on both sides of the pipe, or they can be installed on the same side to receive reflected waves.

[0042] In some embodiments, the ultrasonic detection module 100 includes a plurality of detection units 110.

[0043] In this embodiment, multiple detection units 110 are set on the coating pipe, which can cover the entire cross-section of the pipe and eliminate detection blind spots. This improves the accuracy of bubble positioning, assists in analyzing the source of bubbles, enhances the anti-interference capability of detection, and reduces the false judgment rate. Ultimately, it significantly improves the comprehensiveness, accuracy, and reliability of bubble detection.

[0044] In some embodiments, such as Figure 4 As shown, the data acquisition module 200 includes a signal acquisition unit 210 and a data storage unit 220 that are interconnected.

[0045] The signal acquisition unit 210 is used to acquire the first electrical signal and convert the first electrical signal into a digital signal, and the data storage unit 220 is used to store the digital signal.

[0046] In this embodiment, the signal acquisition unit 210 and data storage unit 220 in the data acquisition module 200 are directly connected via an internal data bus (such as SPI, I2C, or parallel bus) to form a continuous "acquisition-storage" link. The signal acquisition unit 210 is the core of the front-end data processing. Its main function is to receive the first electrical signal from the ultrasonic detection module 100 and convert the analog first electrical signal into a digital signal through a built-in analog-to-digital converter (ADC). This process must ensure conversion accuracy and sampling rate to completely preserve the signal characteristics related to the bubble, such as amplitude and frequency changes. After the conversion is completed, the signal acquisition unit 210 transmits the digital signal to the data storage unit 220 in real time through the connection line.

[0047] The data storage unit 220 is responsible for data temporary storage and backup. It will classify and store the digital signals transmitted by the signal acquisition unit 210 according to time sequence or detection point number.

[0048] In some embodiments, such as Figure 4 As shown, the data acquisition module 200 also includes a synchronization unit 230, which is connected to the data storage unit 220 and is used to send a stop signal to the ultrasonic detection module 100 after the storage space of the data storage unit 220 is exhausted.

[0049] In this embodiment, the core function of the synchronization unit 230 is to monitor the storage space status of the data storage unit 220. When the synchronization unit 230 receives information from the data storage unit 220 that the storage space is used up, it immediately sends a stop signal to the ultrasonic detection module 100, causing the ultrasonic detection module 100 to stop signal acquisition. This avoids data corruption or loss caused by insufficient storage space preventing the storage of new data, thus ensuring the data integrity and stability of the entire device.

[0050] In some embodiments, the data acquisition module 200 includes a high-speed A / D acquisition card.

[0051] In this embodiment, the data acquisition module 200 is implemented based on a high-speed A / D acquisition card. However, depending on the usage requirements, other data acquisition components that can achieve similar effects, such as high-speed ADC chips and general-purpose data acquisition cards, can also be used to implement the functions of the data acquisition module 200.

[0052] In some embodiments, such as Figure 2 As shown, the ultrasonic detection module 100 includes a filtering unit 120, which is used to amplify and filter the first electrical signal.

[0053] In this embodiment, because ultrasonic waves attenuate as they propagate through a medium, the first electrical signal directly acquired by the ultrasonic detection module 100 is typically quite weak. The filtering unit 120 linearly amplifies the signal using a built-in operational amplifier, increasing the signal amplitude to a range suitable for subsequent processing, ensuring that the signal acquisition unit 210 can effectively identify it. Furthermore, the first electrical signal may contain ambient noise. The filtering unit 120 uses RC filter circuits, active filters, and other structures to selectively retain the characteristic frequency range of the ultrasonic signal, filtering out irrelevant frequency noise and improving the signal-to-noise ratio.

[0054] In some embodiments, such as Figure 5 As shown, the central processing module 300 includes an oscilloscope 320, which is used to convert digital signals into visual data.

[0055] In this embodiment, the input terminal of the oscilloscope 320 receives the converted digital signal. As a visualization tool, the core function of the oscilloscope is to convert the received digital signal into intuitive visual data. It can present abstract digital signals on a display screen in the form of waveforms, clearly demonstrating the characteristics of the ultrasonic signal during propagation through changes in waveform amplitude, frequency, and phase. By observing these visual waveforms, operators can intuitively determine whether there are any abnormal signals related to bubbles, such as sudden drops in waveform amplitude or frequency shifts. This provides a visual basis for the bubble detection by the central processing module 300 and facilitates subsequent analysis and tracing of the detection process. The oscilloscope allows the characteristics of digital signals to be visualized, improving the intuitive understanding and efficiency of bubble detection results.

[0056] In some embodiments, such as Figure 1 As shown, the device also includes an alarm module 400, which is used to issue an alarm signal when the central processing module 300 determines that there are air bubbles in the coating pipeline.

[0057] In this embodiment, the alarm module 400 is connected to the central processing module 300 and can establish a signal transmission link through a wired interface or wireless communication to receive control signals from the central processing module 300. When the central processing module 300 determines that there are air bubbles in the coating pipeline, it responds to the trigger command issued by the central processing module 300 and immediately issues an alarm signal. The alarm module 400 may include audible alarm elements such as a buzzer and a speaker, and may also include visual alarm elements such as LED lights and strobe lights.

[0058] The beneficial effects of this utility model are as follows: it can monitor in advance whether the slurry in the coating pipeline contains air bubbles. If air bubbles are found in the slurry, the slurry containing air bubbles can be discharged in advance to prevent the slurry with air bubbles from entering the coating process and coating the electrode sheet containing air bubbles. This realizes the early monitoring and prevention of air bubble problems in the coating process, thereby improving the quality of the coating process.

[0059] The above description is merely an embodiment of the present utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present utility model, but these improvements all fall within the protection scope of the present utility model.

Claims

1. A device for detecting air bubbles in a coating pipe, installed on the coating pipe, characterized in that, It includes an ultrasonic testing module, a data acquisition module, and a central processing module connected in sequence; The ultrasonic detection module is used to send ultrasonic signals to the coating pipe and convert the ultrasonic signals passing through the coating pipe into a first electrical signal. The data acquisition module is used to acquire the first electrical signal, convert the first electrical signal into a digital signal, and send it to the central processing module. The central processing module is used to determine whether there are air bubbles in the coating pipeline based on the digital signal.

2. The device for detecting air bubbles in coated pipes according to claim 1, characterized in that, The ultrasonic detection module includes a detection unit, which comprises an ultrasonic transmitter, an ultrasonic transmitting transducer, an ultrasonic receiving transducer, and an ultrasonic receiver connected in sequence.

3. The device for detecting air bubbles in coated pipes according to claim 2, characterized in that, The ultrasonic transmitting transducer and the ultrasonic receiving transducer are disposed opposite each other on both sides of the coating pipe. The ultrasonic transmitter is used to send a second electrical signal to the ultrasonic transducer, the ultrasonic transducer is used to convert the second electrical signal into a first ultrasonic signal, the ultrasonic transducer is used to receive the second ultrasonic signal generated after the first ultrasonic signal passes through the coating pipe, and the ultrasonic receiver is used to convert the second ultrasonic signal into a first electrical signal.

4. The device for detecting air bubbles in coated pipes according to claim 2, characterized in that, The ultrasonic testing module includes multiple testing units.

5. The device for detecting air bubbles in coated pipes according to claim 1, characterized in that, The data acquisition module includes interconnected signal acquisition units and data storage units; The signal acquisition unit is used to acquire the first electrical signal and convert the first electrical signal into the digital signal, and the data storage unit is used to store the digital signal.

6. The device for detecting air bubbles in coated pipes according to claim 5, characterized in that, The data acquisition module also includes a synchronization unit, which is connected to the data storage unit and is used to send a stop signal to the ultrasonic detection module after the storage space of the data storage unit is exhausted.

7. The device for detecting air bubbles in coated pipes according to claim 6, characterized in that, The data acquisition module includes a high-speed A / D acquisition card.

8. The device for detecting air bubbles in coated pipes according to claim 1, characterized in that, The ultrasonic detection module includes a filtering unit, which is used to amplify and filter the first electrical signal.

9. The device for detecting air bubbles in coated pipes according to claim 1, characterized in that, The central processing module includes an oscilloscope, which is used to convert the digital signal into visual data.

10. The device for detecting air bubbles in coated pipes according to claim 1, characterized in that, The device also includes an alarm module, which is used to issue an alarm signal when the central processing module determines that there are air bubbles in the coating pipe.

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