Method for judging consistency of upper layer and lower layer of coating and related device

Abstract

The invention discloses a method for judging the consistency of upper and lower layers of coating and a related device. The method comprises the following steps: continuously transmitting a first pulse ultrasonic signal to a double-layer pole piece coated in real time; obtaining a first signal transmitted by the double-layer pole piece based on the first pulse ultrasonic signal; and normal distribution calculation is carried out based on the first signal and a pre-established signal initial value so as to judge the consistency of the upper coating layer and the lower coating layer. Therefore, according to the method, the fusion state of the upper coating layer and the lower coating layer can be calculated in real time through the sound wave signal obtained after the pulse ultrasonic signal penetrates through the double-layer pole piece, and the calculation result is accurate and timely.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a method for judging the consistency of upper and lower coating layers and a related device. Background Art

[0002] There are two main coating methods at present: single-layer coating and double-layer coating. Among them, single-layer coating is the most mainstream coating method at present, and can only coat one slurry at the same time; double-layer coating, as a new coating method, can coat two slurries at the same time, but the degree of mutual penetration of the two slurries has a great influence on battery performance. Therefore, how to accurately detect the consistency of the upper and lower layers of double-layer coating in real time (that is, the degree of mutual penetration of the two slurries) has become a technical problem that people in this field need to solve urgently. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for judging the consistency of upper and lower layers of coating and a related device to overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect, a method for judging the consistency of upper and lower coating layers comprises:

[0005] Continuously transmitting a first pulse ultrasonic signal to the double-layer pole piece coated in real time;

[0006] Obtaining a first signal transmitted by the double-layer pole piece based on the first pulsed ultrasonic signal;

[0007] Based on the first signal and the pre-established initial value of the signal, a normal distribution calculation is performed to determine the consistency of the coating of the upper and lower layers.

[0008] Optionally, in certain optional embodiments, before continuously transmitting the first pulsed ultrasonic signal to the real-time coated double-layer pole piece, the method further comprises:

[0009] Continuously emitting a second pulse ultrasonic signal to the single-layer pole piece coated in real time;

[0010] A second signal transmitted by the single-layer pole piece based on the second pulsed ultrasonic signal is obtained.

[0011] Optionally, in some optional embodiments, the normal distribution calculation is performed based on the first signal and the pre-established signal initial value to determine the consistency of the upper and lower layers coated, including:

[0012] Subtract the second signal from the first signal to obtain a third signal;

[0013] Based on the third signal and the pre-established initial value of the signal, a normal distribution calculation is performed to determine the consistency of the coating of the upper and lower layers.

[0014] Optionally, in some optional embodiments, the normal distribution calculation is performed based on the third signal and the pre-established signal initial value to determine the consistency of the upper and lower layers coated, including:

[0015] If the amplitude of the third signal exceeds 50% of the initial value of the signal, it is directly determined that the consistency of the upper and lower layers of the coating is very poor;

[0016] If the amplitude of the third signal does not exceed 50% of the initial value of the signal, then calculating the amplitude standard deviation and the amplitude average according to the amplitude of the third signal;

[0017] Establishing a normal distribution diagram of the third signal according to the amplitude standard deviation and the amplitude mean value;

[0018] Based on the normal distribution graph, the consistency of the upper and lower layers of the coating is determined.

[0019] Optionally, in certain optional embodiments, after directly determining that the consistency of the coated upper and lower layers is very poor, the method further comprises:

[0020] An alarm is issued and the coating machine is stopped.

[0021] Optionally, in certain optional embodiments, judging the consistency of the upper and lower layers of the coating based on the normal distribution graph includes:

[0022] If the proportion of data in the first interval range in the normal distribution diagram is not less than the first preset proportion, it is determined that the consistency of the upper and lower layers of the coating is good, wherein the first interval range = [(the amplitude standard deviation - the amplitude average), (the amplitude standard deviation + the amplitude average)];

[0023] If the proportion of data in the first interval in the normal distribution diagram is less than a first preset proportion and greater than a second preset proportion, it is determined that the consistency of the upper and lower layers of the coating is average, wherein the first preset proportion is greater than the second preset proportion;

[0024] If the proportion of data in the first interval in the normal distribution diagram is not greater than the second preset proportion, it is determined that the consistency of the coating upper and lower layers is poor.

[0025] Optionally, in some optional implementations, the process of establishing the initial value of the signal includes:

[0026] When the consistency of the upper and lower layers of coating is first detected, a third pulse ultrasonic signal is continuously emitted to the double-layer pole piece coated in real time;

[0027] Obtaining a fourth signal transmitted by the double-layer pole piece based on the third pulsed ultrasonic signal;

[0028] Subtracting the second signal from the fourth signal to obtain a fifth signal;

[0029] The average amplitude of the fifth signal is used as the initial value of the signal.

[0030] In a second aspect, a coating upper and lower layer consistency judgment device includes: a first signal transmitting unit, a first signal receiving unit and a consistency judgment unit;

[0031] The first signal transmitting unit is used to continuously transmit a first pulse ultrasonic signal to the double-layer pole piece coated in real time;

[0032] The first signal receiving unit is used to obtain a first signal transmitted by the double-layer pole piece based on the first pulse ultrasonic signal;

[0033] The consistency judgment unit is used to perform normal distribution calculation based on the first signal and a pre-established signal initial value, so as to judge the consistency of the upper and lower layers coated.

[0034] In a third aspect, a computer-readable storage medium stores a program thereon, and when the program is executed by a processor, the method for determining the consistency of the upper and lower layers of coating described in any one of the above items is implemented.

[0035] In a fourth aspect, an electronic device comprises at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; and the processor is used to call program instructions in the memory to execute any of the above-mentioned methods for determining the consistency of the upper and lower layers of the coating.

[0036] By means of the above technical scheme, the present invention provides a method and related device for judging the consistency of the upper and lower layers of coating, which can continuously emit a first pulse ultrasonic signal to the double-layer electrode piece being coated in real time; obtain the first signal transmitted by the double-layer electrode piece based on the first pulse ultrasonic signal; perform normal distribution calculation based on the first signal and the pre-established signal initial value, so as to judge the consistency of the upper and lower layers of coating. It can be seen from this that the present invention can calculate the fusion state of the upper and lower layers of coating in real time through the sound wave signal after the pulse ultrasonic signal passes through the double-layer electrode piece, and the calculation result is relatively accurate and timely.

[0037] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0039] Figure 1 A flow chart showing a method for judging consistency of upper and lower layers of coating provided by the present invention is shown;

[0040] Figure 2 A schematic structural diagram of an air-coupled ultrasonic detection system provided by the present invention is shown;

[0041] Figure 3 A first normal distribution schematic diagram provided by the present invention is shown;

[0042] Figure 4 A schematic diagram of a detection result provided by the present invention is shown;

[0043] Figure 5 A second normal distribution schematic diagram provided by the present invention is shown;

[0044] Figure 6 A third normal distribution schematic diagram provided by the present invention is shown;

[0045] Figure 7 A schematic diagram of the structure of a device for judging consistency of upper and lower layers of coating provided by the present invention is shown;

[0046] Figure 8 A structural schematic diagram of an electronic device provided by the present invention is shown. DETAILED DESCRIPTION

[0047] There are two main coating methods at present: single-layer coating and double-layer coating. Among them, single-layer coating is the most mainstream coating method at present, and can only coat one slurry at the same time; double-layer coating, as a new coating method, can coat two slurries at the same time, but the degree of mutual penetration of the two slurries has a great influence on battery performance. Therefore, how to accurately detect the consistency of the upper and lower layers of double-layer coating in real time (that is, the degree of mutual penetration of the two slurries) has become a technical problem that people in this field need to solve urgently.

[0048] Currently, there is no definite testing method that can monitor the fusion state of the upper and lower layers of the coating in real time during continuous coating. It can only be seen by using analytical testing methods after coating, which greatly affects production efficiency, causing waste of raw materials, reduced yield, etc. Therefore, the inventors of this solution have found that an air-coupled ultrasonic transducer can be used to monitor the fusion state of the upper and lower layers of the coating in real time during the double-layer coating process through the attenuation of acoustic energy, so as to ensure the consistency of the fusion of the upper and lower layers of the same batch of coatings.

[0049] That is, the present invention can establish an air-coupled ultrasonic detection system for detecting the fusion state of the upper and lower layers of the coating. The air-coupled ultrasonic detection system transmits ultrasonic waves to the surface of the detection object through an ultrasonic transducer. When the ultrasonic wave propagates inside the detection object, if it encounters the interface or defect of different media, it will produce reflection, refraction, scattering and other phenomena. Ultrasonic imaging can directly display the internal conditions of the object, has high reliability and high reproducibility, and can perform quantitative dynamic detection of defects. Its acoustic principles mainly include three forms: diffusion attenuation, scattering attenuation and absorption attenuation. Diffusion attenuation means that when the sound wave propagates in the medium, as the beam diffuses, the wavefront continues to advance and expand, causing its propagation energy to gradually decrease with increasing distance. This attenuation mainly depends on the geometric shape of the wavefront and has nothing to do with the properties of the propagation medium; scattering attenuation means that when the sound wave encounters an interface composed of media with different acoustic impedances, scattering (reflection, refraction or wave type conversion) will occur, which reduces the energy in the original propagation direction of the sound wave; scattering attenuation is related to the properties of the material, especially the size of the grains in the material has a significant effect on scattering attenuation. Absorption attenuation: When sound waves propagate in a medium, due to factors such as internal friction (viscosity) and heat conduction between medium particles, sound energy is converted into other forms of energy (such as heat energy), which is also called viscous attenuation. These factors work together to cause sound waves to attenuate when they encounter defects, affecting their propagation distance and energy intensity. Especially in ultrasonic testing, defects may cause the propagation speed of ultrasonic waves to slow down, echo reception to be abnormal, signal interference, etc., thus affecting the accuracy of the test results.

[0050] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0051] like Figure 1 As shown, the present invention provides a method for judging the consistency of upper and lower layers of coating, including: S100, S200 and S300;

[0052] S100, continuously transmitting a first pulse ultrasonic signal to the double-layer electrode piece coated in real time;

[0053] Optionally, the present invention can be applied to Figure 2 The system shown in the figure, the present invention can be based on Figure 2 The “ultrasonic transmitter and receiver” transmits a first pulse ultrasonic signal to the bipolar plate, and the present invention does not impose any limitation on this.

[0054] Optionally, the present invention may be a process of sending signals in real time, receiving signals in real time, and making judgments in real time. That is, the present invention may send and receive corresponding transmission signals in real time, and then calculate and update subsequent normal distribution graphs in real time together with previous data, and then judge the consistency of the upper and lower coating layers based on the updated normal distribution graph in real time, and the present invention is not limited to this.

[0055] Of course, the present invention can also be a process that is executed periodically. That is, in each cycle, signals are continuously sent and the transmission signal of the cycle is received, and then the corresponding normal distribution graph is obtained based on the transmission signal in the cycle, and the consistency of the upper and lower layers coated in the cycle is judged based on this, and the present invention is not limited to this.

[0056] Optional, Figure 2 The various devices and their parameters in the system shown are as follows:

[0057] Relative position: The vertical distance between the two ultrasonic transducers is set to 40mm (can be adjusted manually). That is, the distance between the transmitting probe and the test object is 20mm, and the distance between the receiving probe and the test object is 20mm (positioning accuracy is ±0.07mm, resolution is 0.02mm).

[0058] Figure 2 The ultrasonic transmitter and receiver in the apparatus may include a femtosecond ultrasonic transmitter (including a transmitting probe) and an air-coupled ultrasonic receiver; the femtosecond ultrasonic transmitter: emits laser light in the form of pulses, each pulse lasting several femtoseconds (10s to 15s), and the repetition frequency is set to 500Hz. Since there is a huge characteristic acoustic impedance difference when ultrasonic waves are incident from air to lithium batteries, a high-power ultrasonic generator with a built-in 10dB amplifier is used, the amplification voltage is set to 300V, and the wave number is set to 15.

[0059] Air-coupled ultrasonic receiver: During the coating process, the detection system and the electrode to be tested are required to have no contact, so the transducer is required to have good air characteristic acoustic impedance coupling and high sensitivity. The air-coupled focused circulation transducer is used here to ensure that the sound beam is focused to the center line and the detection accuracy of the ultrasonic scanning is guaranteed. Among them, the ultrasonic transducer has a focusing length of 20mm, a center frequency of 500kHz, and a diameter of 23mm.

[0060] Preamplifier: Because ultrasonic waves will be severely attenuated when passing through the object being tested due to different impedances, the amplifier can amplify the oscillation signal to the required level. Here, a high signal-to-noise ratio amplifier with an amplification of 80dB is selected.

[0061] Acquisition card: During the circuit construction process, the computer is used as the upper terminal, and data communication is achieved through a high-speed, high-precision motion control card. The acquisition frequency of the acquisition card is set to 10MHz.

[0062] Optionally, the present invention can use the vertical transmission method to detect the fusion state of the upper and lower coatings. That is, the present invention can install the device in a direction perpendicular to the direction of the electrode coating (specifically between the position of the electrode after entering the oven for baking and before winding, where the connection line between the receiving probe and the transmitting probe should be perpendicular to the electrode), and detect the fusion state of the double-layer coating interface in real time through the energy change after the pulse wave penetrates the detection object.

[0063] Optionally, since the double-layer pole piece is used for coating, the coating obtained after coating includes two layers of coating (upper and lower layers, i.e., upper coating and lower coating). Therefore, emitting pulsed ultrasonic signals to the pole pieces (double-layer pole pieces and single-layer pole pieces) can be understood as generating pulsed ultrasonic signals to the coating to detect the loss of the pulsed ultrasonic signals due to the coating, and the present invention does not limit this.

[0064] Optionally, in some optional embodiments, before S100, the method further includes: step 1.1 and step 1.2;

[0065] Step 1.1, continuously emitting a second pulse ultrasonic signal to the single-layer electrode sheet coated in real time;

[0066] Step 1.2: Obtain a second signal transmitted by the single-layer pole piece based on the second pulse ultrasonic signal.

[0067] Optionally, the present invention detects the fusion state of the upper and lower layers of the double-layer electrode coating process. In order to improve the accuracy of the present invention, the present invention can use the transmitted signal during the single-layer electrode coating as a reference group for comparison to offset the impact of defects in the interface between the copper foil and the coating. The present invention does not impose any restrictions on this.

[0068] S200, obtaining a first signal transmitted by the double-layer pole piece based on the first pulsed ultrasonic signal;

[0069] Optionally, as mentioned above, when the ultrasonic signal penetrates the double-layer pole piece, the different fusion states of the upper and lower layers of the coating will cause the ultrasonic signal to have different penetration effects, which is directly reflected in the difference in amplitude of the signal received by the receiving end. Therefore, the present invention can obtain the first signal after the first pulse ultrasonic signal penetrates the double-layer pole piece in real time, so as to facilitate subsequent judgment, and the present invention does not limit this.

[0070] S300, performing normal distribution calculation based on the first signal and a pre-established signal initial value to determine the consistency of the coating of the upper and lower layers.

[0071] Optionally, the normal distribution calculation mentioned in the present invention is a technical concept well known in the art, and the present invention will not make any detailed descriptions on this. For details, please refer to the relevant descriptions in the art.

[0072] Optionally, in some optional implementations, the S300 includes: step 2.1 and step 2.2;

[0073] Step 2.1, subtract the second signal from the first signal to obtain a third signal;

[0074] Step 2.2: Based on the third signal and the pre-established initial value of the signal, a normal distribution calculation is performed to determine the consistency of the upper and lower coating layers.

[0075] Optionally, in some optional implementations, the process of establishing the initial value of the signal includes:

[0076] When the consistency of the upper and lower layers of coating is first detected, a third pulse ultrasonic signal is continuously emitted to the double-layer pole piece coated in real time;

[0077] Obtaining a fourth signal transmitted by the double-layer pole piece based on the third pulsed ultrasonic signal;

[0078] Subtracting the second signal from the fourth signal to obtain a fifth signal;

[0079] The average amplitude of the fifth signal is used as the initial value of the signal.

[0080] For example, the present invention can calculate the average value of the first 100 pulses of the double-layer coated electrode during the first detection as the initial value of the signal. During the execution of the present invention, the first signal is continuously scanned and obtained and the third signal is calculated. When the amplitude of the third signal exceeds 50% of the initial value of the signal, the execution device of the present invention can automatically alarm and shut down, and the present invention does not limit this.

[0081] Combination Figure 2 In the system diagram shown, the threshold is set to 50%. When the amplitude exceeds 50% of the initial value of the signal, it means that the double-layer electrode cannot be used any more. The present invention can compare the amplitude and the initial value of the signal while scanning, and stop coating when it exceeds 50% to avoid wasting materials; if it does not exceed 50%, the present invention can make a normal distribution judgment on the data after complete detection to determine the consistency, and the present invention does not limit this.

[0082] That is, in some optional embodiments, the step 2.2 includes: step 3.1, step 3.2, step 3.3 and step 3.4;

[0083] Step 3.1, if the amplitude of the third signal exceeds 50% of the initial value of the signal, it is directly determined that the consistency of the upper and lower layers of the coating is very poor;

[0084] Optionally, as mentioned above, when the amplitude of the third signal exceeds 50% of the initial value of the signal, it indicates that the fusion state of the coatings of the upper and lower layers is particularly poor, and subsequent judgment is no longer required, and the machine can be directly shut down.

[0085] That is, in certain optional embodiments, after directly determining in step 3.1 that the consistency of the coated upper and lower layers is very poor, the method further comprises: step 4.1;

[0086] Step 4.1, issue an alarm and control the coating machine to stop.

[0087] Step 3.2: If the amplitude of the third signal does not exceed 50% of the initial value of the signal, calculate the amplitude standard deviation and the amplitude average according to the amplitude of the third signal;

[0088] Optionally, if the amplitude of the third signal does not exceed 50% of the initial value of the signal, it means that the consistency of the upper and lower layers may be good, average or poor. Therefore, the present invention requires more detailed calculations to accurately identify, and the present invention does not limit this.

[0089] Step 3.3, establishing a normal distribution diagram of the third signal according to the amplitude standard deviation and the amplitude mean;

[0090] Step 3.4: Based on the normal distribution diagram, determine the consistency of the upper and lower layers of the coating.

[0091] Optionally, in some optional embodiments, the step 3.4 includes: step 5.1, step 5.2 and step 5.3;

[0092] Step 5.1, if the proportion of data in the first interval range in the normal distribution diagram is not less than a first preset proportion, it is determined that the consistency of the upper and lower layers of the coating is good, wherein the first interval range = [(the amplitude standard deviation - the amplitude average), (the amplitude standard deviation + the amplitude average)];

[0093] Step 5.2: If the proportion of data in the first interval in the normal distribution diagram is less than a first preset proportion and greater than a second preset proportion, it is determined that the consistency of the upper and lower layers of the coating is average, wherein the first preset proportion is greater than the second preset proportion;

[0094] Step 5.3: If the proportion of the data in the first interval in the normal distribution diagram is not greater than the second preset proportion, it is determined that the consistency of the coating upper and lower layers is poor.

[0095] Optionally, the first preset ratio in the present invention may be 80%, and the second preset ratio may be 40%, and the present invention is not limited to this.

[0096] Optionally, in order to further clarify the solution of the present invention, the present invention provides the following Figure 3 The embodiment shown, Figure 3 A normal distribution plot of the illustrated example.

[0097] That is, the present invention can perform ultrasonic testing on a certain sample, taking the data obtained from the previous 100 pulse signals as an example, and making it into a normal distribution graph, the result is as follows Figure 3 The mean value (μ) of the amplitude in the data is 0.34, the standard deviation (σ) of the amplitude is 0.17, and the data within the range of μ±σ accounts for 82% of the total data, proving that the coating consistency is good.

[0098] Optionally, the present invention can also indirectly indicate the fusion state of the upper and lower layers through the waveform diagram of the test results. Figure 4 The data after eliminating the benchmark group. Among them, the left figure shows different test results, and the right figure is a schematic diagram of the corresponding detection principle. It can be seen from the test results that when the waveform is more obvious, the guided wave amplitude is large. This is because the bonding layer at this time is close to the ideal interface, and the transmission of acoustic energy follows the principle of interface sound pressure distribution, resulting in the ultrasonic guided wave penetrating the double-layer structure. The transmission energy is maximum and the amplitude is large. When the waveform and amplitude are small, this is because the bonding layer at this time is worse than the previous one, the internal defects increase, and the sound wave attenuation is greater, so the transmitted energy is reduced, and the phenomenon shown is that the amplitude is smaller. When the amplitude is the smallest, the bonding between the upper and lower layers is the worst at this time. The present invention can regard the interface between the upper and lower layers as a thin layer of air. The emitted acoustic energy is not enough to transmit to the upper layer, and total reflection occurs in the lower layer. Therefore, the ultrasonic guided wave has the lowest amplitude and the smallest energy when detecting the double-layer debonding structure.

[0099] For another example, the present invention performs ultrasonic testing on a sample, and takes the data obtained from the first 100 pulses as an example, and makes it into a normal distribution graph, the result is as follows: Figure 5 The mean value (μ) of the amplitude in the data is 0.36, and the standard deviation (σ) is 0.2. It is calculated that the data within the range of μ±σ accounts for 75% of the total data, proving that the coating consistency is average.

[0100] For another example, the present invention performs ultrasonic testing on a sample, and takes the data obtained from the first 100 pulse signals as an example, and makes it into a normal distribution diagram, the result is as follows: Figure 6 The mean value (μ) of the amplitude in the data is 0.33, and the standard deviation (σ) is 0.05. It is calculated that the data within the range of μ±σ accounts for 25% of the total data, proving that the coating consistency is poor.

[0101] like Figure 7As shown, the present invention provides a device for judging the consistency of upper and lower layers of coating, comprising: a first signal transmitting unit 100, a first signal receiving unit 200 and a consistency judging unit 300;

[0102] The first signal transmitting unit 100 is used to continuously transmit a first pulse ultrasonic signal to the double-layer pole piece coated in real time;

[0103] The first signal receiving unit 200 is used to obtain a first signal transmitted by the double-layer pole piece based on the first pulse ultrasonic signal;

[0104] The consistency judgment unit 300 is used to perform normal distribution calculation based on the first signal and a pre-established signal initial value, so as to judge the consistency of the upper and lower layers coated.

[0105] Optionally, in certain optional embodiments, the device further comprises: a second signal transmitting unit and a second signal receiving unit;

[0106] The second signal transmitting unit is used for continuously transmitting the second pulse ultrasonic signal to the single-layer pole piece being coated in real time before continuously transmitting the first pulse ultrasonic signal to the double-layer pole piece being coated in real time;

[0107] The second signal receiving unit is used to obtain a second signal transmitted by the single-layer pole piece based on the second pulse ultrasonic signal.

[0108] Optionally, in some optional implementations, the consistency judgment unit 300 includes: a third signal calculation unit and a consistency judgment subunit;

[0109] The third signal calculation unit is used to subtract the second signal from the first signal to obtain a third signal;

[0110] The consistency judgment subunit is used to perform normal distribution calculation based on the third signal and the pre-established signal initial value, so as to judge the consistency of the upper and lower layers coated.

[0111] Optionally, in certain optional implementations, the consistency judgment subunit includes: a very poor state subunit, an amplitude calculation subunit, a distribution map establishment subunit and a distribution map judgment subunit;

[0112] The very poor state subunit is used to directly determine that the consistency of the coated upper and lower layers is very poor if the amplitude of the third signal exceeds 50% of the initial value of the signal;

[0113] The amplitude calculation subunit is used to calculate the amplitude standard deviation and the amplitude average according to the amplitude of the third signal if the amplitude of the third signal does not exceed 50% of the initial value of the signal;

[0114] The distribution graph establishing subunit is used to establish a normal distribution graph of the third signal according to the amplitude standard deviation and the amplitude mean value;

[0115] The distribution graph judgment subunit is used to judge the consistency of the upper and lower layers of the coating based on the normal distribution graph.

[0116] Optionally, in certain optional embodiments, the device further comprises: a shutdown unit;

[0117] The shutdown unit is used to issue an alarm and control the coating machine to shut down after directly determining that the consistency of the upper and lower layers of the coating is very poor.

[0118] Optionally, in certain optional embodiments, the distribution graph judgment subunit includes: a better state subunit, a general state subunit, and a worse state subunit;

[0119] The better state subunit is used to determine that the consistency of the coated upper and lower layers is better if the proportion of data in the first interval range in the normal distribution diagram is not less than a first preset proportion, wherein the first interval range=[(the amplitude standard deviation-the amplitude average), (the amplitude standard deviation+the amplitude average)];

[0120] The general state subunit is used to determine that the consistency of the upper and lower layers coated is general if the proportion of data in the first interval range in the normal distribution diagram is less than a first preset proportion and greater than a second preset proportion, wherein the first preset proportion is greater than the second preset proportion;

[0121] The poor state subunit is used to determine that the consistency of the coated upper and lower layers is poor if the proportion of data in the first interval range in the normal distribution diagram is not greater than the second preset proportion.

[0122] Optionally, in certain optional implementations, the device further comprises: a signal initial value establishing unit;

[0123] The signal initial value establishing unit comprises: a third signal transmitting subunit, a fourth signal receiving subunit, a fifth signal calculating subunit and a signal initial value establishing subunit;

[0124] The signal initial value establishing unit is used to execute the process of establishing the signal initial value;

[0125] The third signal transmitting subunit is used to continuously transmit a third pulse ultrasonic signal to the double-layer electrode piece being coated in real time when the consistency of the upper and lower layers being coated is detected for the first time;

[0126] The fourth signal receiving subunit is used to obtain a fourth signal transmitted by the double-layer pole piece based on the third pulse ultrasonic signal;

[0127] The fifth signal calculation subunit is configured to subtract the second signal from the fourth signal to obtain a fifth signal;

[0128] The signal initial value establishing subunit is used to use the average amplitude of the fifth signal as the signal initial value.

[0129] The present invention provides a computer-readable storage medium having a program stored thereon, and when the program is executed by a processor, any of the above-mentioned methods for determining the consistency of the upper and lower layers of coating is implemented.

[0130] like Figure 8 As shown, the present invention provides an electronic device 70, which includes at least one processor 701, and at least one memory 702 and a bus 703 connected to the processor 701; wherein the processor 701 and the memory 702 communicate with each other through the bus 703; the processor 701 is used to call the program instructions in the memory 702 to execute any of the above-mentioned methods for judging the consistency of the upper and lower layers of the coating.

[0131] In the present invention, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0132] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0133] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present invention may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in the present invention, but will conform to the widest scope consistent with the principles and novel features disclosed in the present invention.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for judging the consistency of upper and lower layers of coating, characterized in that: include: Continuously transmitting a first pulse ultrasonic signal to the double-layer pole piece coated in real time; Obtaining a first signal transmitted by the double-layer pole piece based on the first pulsed ultrasonic signal; Based on the first signal and the pre-established initial value of the signal, a normal distribution calculation is performed to determine the consistency of the coating of the upper and lower layers.

2. The method according to claim 1, characterized in that Before continuously transmitting the first pulsed ultrasonic signal to the real-time coated double-layer pole piece, the method further includes: Continuously emitting a second pulse ultrasonic signal to the single-layer pole piece coated in real time; A second signal transmitted by the single-layer pole piece based on the second pulsed ultrasonic signal is obtained.

3. The method according to claim 2, characterized in that The method of performing normal distribution calculation based on the first signal and the pre-established initial value of the signal to determine the consistency of the upper and lower layers of coating includes: Subtract the second signal from the first signal to obtain a third signal; Based on the third signal and the pre-established initial value of the signal, a normal distribution calculation is performed to determine the consistency of the coating of the upper and lower layers.

4. The method according to claim 3, characterized in that The method of performing normal distribution calculation based on the third signal and the pre-established signal initial value to judge the consistency of the coating of the upper and lower layers includes: If the amplitude of the third signal exceeds 50% of the initial value of the signal, it is directly determined that the consistency of the upper and lower layers of the coating is very poor; If the amplitude of the third signal does not exceed 50% of the initial value of the signal, then calculating the amplitude standard deviation and the amplitude average according to the amplitude of the third signal; Establishing a normal distribution diagram of the third signal according to the amplitude standard deviation and the amplitude mean value; Based on the normal distribution graph, the consistency of the upper and lower layers of the coating is determined.

5. The method according to claim 4, characterized in that After directly determining that the consistency of the coated upper and lower layers is very poor, the method further comprises: An alarm is issued and the coating machine is stopped.

6. The method according to claim 4, characterized in that The step of judging the consistency of the upper and lower layers of the coating based on the normal distribution graph includes: If the proportion of data in the first interval range in the normal distribution diagram is not less than the first preset proportion, it is determined that the consistency of the upper and lower layers of the coating is good, wherein the first interval range = [(the amplitude standard deviation - the amplitude average), (the amplitude standard deviation + the amplitude average)]; If the proportion of data in the first interval in the normal distribution diagram is less than the first preset proportion and greater than the second preset proportion, it is determined that the consistency of the upper and lower layers of the coating is average, wherein the first preset proportion is greater than the second preset proportion; If the proportion of data in the first interval in the normal distribution diagram is not greater than the second preset proportion, it is determined that the consistency of the coating upper and lower layers is poor.

7. The method according to claim 4, characterized in that The process of establishing the initial value of the signal includes: When the consistency of the upper and lower layers of coating is first detected, a third pulse ultrasonic signal is continuously emitted to the double-layer pole piece coated in real time; Obtaining a fourth signal transmitted by the double-layer pole piece based on the third pulsed ultrasonic signal; Subtracting the second signal from the fourth signal to obtain a fifth signal; The average amplitude of the fifth signal is used as the initial value of the signal.

8. A device for judging the consistency of upper and lower layers of coating, characterized in that: include: A first signal transmitting unit, a first signal receiving unit and a consistency judging unit; The first signal transmitting unit is used to continuously transmit a first pulse ultrasonic signal to the double-layer pole piece coated in real time; The first signal receiving unit is used to obtain a first signal transmitted by the double-layer pole piece based on the first pulse ultrasonic signal; The consistency judgment unit is used to perform normal distribution calculation based on the first signal and a pre-established signal initial value, so as to judge the consistency of the upper and lower layers coated.

9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the method for determining the consistency of the upper and lower layers of coating as described in any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The electronic device includes at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the method for determining the consistency of the upper and lower layers of the coating as described in any one of claims 1 to 7.

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