Real-time detection method and system for slurry quality

Abstract

The invention relates to a real-time detection method and system for slurry quality. Comprising the steps that an ultrasonic probe unit is configured to conduct scanning detection on slurry, slurry target ultrasonic reflection information is generated after scanning detection, and the slurry target ultrasonic reflection information at least comprises m slurry ultrasonic reflection signal sets, the m groups of slurry ultrasonic reflection signal groups are respectively generated by sequentially performing m times of ultrasonic scanning on slurry by using an ultrasonic probe unit, and based on the m groups of slurry ultrasonic reflection signal groups and the generation sequence of the m groups of slurry ultrasonic reflection signal groups, calculating to obtain a reflection signal correlation coefficient group corresponding to each probe array element, based on the reflection signal correlation coefficient group of each probe array element, the quality state of the slurry is determined, and the quality state of the slurry includes that no foreign matter exists in the slurry or foreign matter exists in the slurry. The slurry quality can be detected in real time, and the detection efficiency and the detection precision are high.

Description

Technical Field

[0001] The invention relates to a detection method and system, in particular to a real-time detection method and system for slurry quality. Background Art

[0002] At present, lithium-ion batteries are widely used in consumer electronics, automobiles, clean energy and other fields, which places increasing demands on the production quality of lithium-ion batteries. Therefore, research on efficient and rapid battery diagnostic methods is of great significance for improving battery quality, battery life and the efficiency of the manufacturing process.

[0003] In the production process of lithium-ion batteries, slurry preparation is generally the first process step. During the slurry preparation, a stirring step is required. The quality of the slurry after stirring generally directly affects the subsequent coating and the final battery performance, and is an important indicator for determining the battery cost. Therefore, in the lithium-ion battery production process, the quality of the slurry before coating occupies a core position. It can be seen that quality inspection of the slurry before coating is crucial.

[0004] It is understandable that after the quality inspection of the slurry, the slurry quality can be evaluated based on the quality inspection results. Specifically, the slurry quality evaluation includes: evaluating whether the slurry is suitable for subsequent coating processes, whether it is beneficial to the performance of battery active materials, etc.

[0005] From the above description, it can be seen that in the production process, if there is a lack of effective monitoring of the slurry before coating, it may lead to poor quality and low resource utilization efficiency of lithium-ion batteries. Therefore, when testing lithium-ion battery slurry, the detection method is generally required to be fast, non-destructive and inexpensive.

[0006] At present, when using ultrasound to detect slurry quality, there are problems such as great detection difficulty, low detection efficiency, and low detection accuracy, which makes it difficult to meet the current demand for ultrasonic detection of slurry. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method and system for real-time detection of slurry quality, which can perform real-time detection of slurry quality with high detection efficiency and detection accuracy.

[0008] According to the technical solution provided by the present invention, a real-time detection method for slurry quality comprises:

[0009] An ultrasonic probe unit is configured to scan and detect the slurry to generate slurry target ultrasonic reflection information after scanning and detecting, wherein:

[0010] The target ultrasonic reflection information of the slurry includes at least m groups of ultrasonic reflection signal groups of the slurry, wherein the m groups of ultrasonic reflection signal groups of the slurry are respectively generated by performing ultrasonic scanning on the slurry m times in sequence using an ultrasonic probe unit.

[0011] For any slurry ultrasonic reflection signal group, the slurry ultrasonic reflection signal group includes a plurality of slurry ultrasonic reflection signals, wherein one slurry ultrasonic reflection signal is collected by one probe array element in the ultrasonic probe unit;

[0012] Based on the m groups of slurry ultrasonic reflection signal groups and the generation order of the m groups of slurry ultrasonic reflection signal groups, a reflection signal phase relationship array corresponding to each probe array element is calculated, wherein:

[0013] For any reflection signal correlation array, it includes (m-1)*q reflection signal correlation coefficients, wherein each reflection signal correlation coefficient is generated by the sampling signal values ​​corresponding to two adjacent slurry ultrasonic reflection signals through correlation operation, and q is the number of sampling points of each slurry ultrasonic reflection signal;

[0014] The quality state of the slurry is determined based on an array of reflection signal correlations of all probe array elements, wherein the quality state of the slurry includes that there is no foreign matter in the slurry or that there is foreign matter in the slurry.

[0015] Based on the reflection signal correlation array of each probe array element, the quality status of the slurry is determined, including:

[0016] Based on the order of generating m groups of slurry ultrasonic reflection signal groups by ultrasonic scanning, a reflection signal correlation array of the current probe array element is calculated and generated, wherein in the reflection signal correlation array, the reflection signal correlation coefficient of each column corresponds to the same sampling position point;

[0017] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when all reflection signal correlation coefficients are not lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there is no foreign matter in the area;

[0018] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there are n consecutive reflection signal correlation coefficients lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there are foreign objects in the area, where 2≤n≤m-1;

[0019] Based on the correlation array of the reflected signals of all the probe array elements, when it is determined that there is a sampling position point corresponding to the slurry area where the quality state is that there is a foreign object in the area, the quality state of the slurry is determined to be that there is a foreign object in the slurry;

[0020] Based on the correlation array of the reflected signals of all the probe array elements, when the quality status of the slurry area corresponding to all the sampling position points is that the area has no foreign matter, it is determined that the quality status of the slurry is that the slurry has no foreign matter.

[0021] Based on the reflection signal correlation array of each probe array element, the quality state of the slurry is determined, which also includes:

[0022] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there is a reflection signal correlation coefficient lower than the reflection signal correlation coefficient threshold, and the number of reflection signal correlation coefficients that are continuously lower than the reflection signal correlation coefficient threshold is less than n, it is determined that there is interference noise in the quality state of the slurry area corresponding to the current probe array element 3;

[0023] When it is determined that the quality state of the slurry area is that interference noise exists, the existing interference noise is eliminated.

[0024] An ultrasonic probe unit is arranged in the conveying direction of the slurry, wherein:

[0025] The ultrasonic probe unit includes two ultrasonic linear array probes, probe array elements are distributed on the ultrasonic linear array probes, and the distribution direction of the probe array elements on each ultrasonic linear array probe is perpendicular to the conveying direction of the slurry;

[0026] When the quality state of the slurry area is determined to be abnormal in the slurry based on the correlation array of the reflected signal of at least one probe array element, the slurry is subjected to abnormal state analysis processing. When it is determined after the abnormal state analysis processing that the abnormality in the slurry is foreign matter in the slurry, the length of the foreign matter is calculated.

[0027] When analyzing and processing abnormal conditions, it includes:

[0028] Based on the correlation array of the reflected signal of the probe array element, the correlation coefficient statistics of each sampling position point are calculated, and the correlation coefficient statistics of the probe array element are generated based on the correlation coefficient statistics of each sampling position point, wherein,

[0029] For the reflection signal correlation coefficient of any sampling position point, when the reflection signal correlation coefficient is lower than the reflection signal correlation coefficient threshold, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 1; otherwise, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 0;

[0030] Adding all correlation coefficient state identification signals corresponding to the same sampling position point, and taking the accumulated value of all correlation coefficient state identification signals as the correlation coefficient statistical value of the current sampling position point;

[0031] Generate probe array element correlation coefficient statistics based on correlation coefficient statistics of all sampling position points;

[0032] For probe element correlation coefficient statistical information of any probe element, when any correlation coefficient statistical value in the probe element correlation coefficient statistical information is not lower than the correlation coefficient statistical threshold, configuring a sampling position point corresponding to the correlation coefficient statistical value as a target sampling position point;

[0033] For each slurry target ultrasonic reflection information, all target sampling position points are clustered to determine the centroid position of all foreign bodies corresponding to the current slurry target ultrasonic reflection information after clustering processing;

[0034] For any two adjacent slurry target ultrasonic reflection information, the centroid positions of the bubbles corresponding to the two slurry target ultrasonic reflection information are compared and analyzed to determine the continuous scanning detection number of each foreign object after the comparison and analysis;

[0035] Based on the number of consecutive scan detections of each foreign object, the length of the foreign object is calculated.

[0036] All target sampling locations are clustered, and the clustering method includes one of meanshift algorithm, k-means clustering, hierarchical clustering, DBSCAN clustering, GMM clustering, spectral clustering or OPTICS clustering.

[0037] When it is determined that there is foreign matter in the slurry, the length of the foreign matter is calculated based on the time trajectory of the foreign matter, and then:

[0038]

[0039] Wherein, dd is the length of the foreign body, v is the flow rate of the slurry, num is the number of continuous scanning detections, and prf is the repetition frequency of each probe array element in the ultrasonic linear array probe emitting ultrasonic waves.

[0040] For each probe array element, the repetition frequency prf of transmitting ultrasonic waves is:

[0041]

[0042] Among them, d 异物 is the detection limit size of the ultrasonic probe unit during scanning detection, d 滤芯 is the diameter of the filter element for filtering the slurry in transit, and v is the flow rate of the slurry;

[0043] When the repetition frequency of each probe array element transmitting ultrasonic waves is configured as prf, the slurry flow distances corresponding to the signal sampling values ​​at the same sampling position points in any two adjacent slurry ultrasonic reflection signals of the probe array element are consistent.

[0044] When two ultrasonic linear array probes are used for scanning and testing, the ultrasonic scanning mode of the probe array elements in the ultrasonic linear array probes includes vertical offset scanning or inclined cross scanning.

[0045] A real-time detection system for slurry quality includes an ultrasonic probe unit and an ultrasonic detection processing device, wherein:

[0046] Performing ultrasonic testing on the slurry using an ultrasonic probe unit to generate target ultrasonic reflection information of the slurry after scanning and testing;

[0047] The ultrasonic detection and processing device processes the ultrasonic reflection information of the slurry target using the detection method described above to determine the quality status of the slurry.

[0048] The advantages of the present invention are as follows: the ultrasonic probe unit is used to scan and detect the slurry to obtain the target ultrasonic reflection information of the slurry. Thereafter, the reflection signal correlation array of each probe array element is calculated based on the target ultrasonic reflection information of the slurry. Then, the quality state of the slurry can be determined based on the reflection signal correlation array of all probe array elements, that is, the slurry quality can be detected in real time, thereby improving the detection efficiency and detection accuracy of the slurry quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The present invention is a flow chart of an embodiment of the quality detection of slurry.

[0050] Figure 2 The present invention is a flowchart of an embodiment of comparative analysis.

[0051] Figure 3 A schematic diagram of an embodiment of scanning detection by an ultrasonic probe unit of the present invention.

[0052] Figure 4 A schematic diagram of another embodiment of scanning detection by the ultrasonic probe unit of the present invention.

[0053] Figure 5 A schematic diagram of an embodiment of determining the length of a foreign body according to the present invention.

[0054] Figure 6 A schematic diagram of an embodiment of constructing a coordinate system of the present invention.

[0055] Explanation of the reference numerals: 1-first ultrasonic linear array probe, 2-second ultrasonic linear array probe, 3-probe array element, 4-foreign matter. DETAILED DESCRIPTION

[0056] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0057] In order to detect the slurry quality in real time, the present invention provides a real-time detection method for slurry quality, the real-time detection method comprising:

[0058] An ultrasonic probe unit is configured to scan and detect the slurry to generate slurry target ultrasonic reflection information after scanning and detecting, wherein:

[0059] The target ultrasonic reflection information of the slurry includes at least m groups of ultrasonic reflection signal groups of the slurry, wherein the m groups of ultrasonic reflection signal groups of the slurry are respectively generated by performing ultrasonic scanning on the slurry m times in sequence using an ultrasonic probe unit.

[0060] For any slurry ultrasonic reflection signal group, the slurry ultrasonic reflection signal group includes a plurality of slurry ultrasonic reflection signals, wherein one slurry ultrasonic reflection signal is collected by one probe array element 3 in the ultrasonic probe unit;

[0061] Based on the m groups of slurry ultrasonic reflection signal groups and the generation order of the m groups of slurry ultrasonic reflection signal groups, a reflection signal phase relationship array corresponding to each probe array element 3 is calculated, wherein:

[0062] For any reflection signal correlation array, it includes (m-1)*q reflection signal correlation coefficients, wherein each reflection signal correlation coefficient is generated by the sampling signal values ​​corresponding to two adjacent slurry ultrasonic reflection signals through correlation operation, and q is the number of sampling points of each slurry ultrasonic reflection signal;

[0063] The quality state of the slurry is determined based on the correlation array of the reflection signals of all the probe array elements 3, wherein the quality state of the slurry includes that there is no foreign matter 4 in the slurry or that there is foreign matter 4 in the slurry.

[0064] In order to be able to perform real-time quality detection on the slurry, the present invention is configured to perform ultrasonic scanning detection on the slurry, wherein, when performing ultrasonic scanning detection, an ultrasonic probe unit should be configured, and then the configured ultrasonic probe unit is used to scan and detect the slurry. It should be noted that when the ultrasonic probe unit is used to scan and detect the slurry, the slurry is generally in a flowing state. For example, the ultrasonic probe unit can be used to scan and detect the slurry transported in the conveying pipe. Therefore, when performing ultrasonic scanning detection on the slurry, the configured ultrasonic probe unit should be able to adapt to the flow of the slurry. The configuration of the ultrasonic probe unit can refer to the corresponding description below.

[0065] It should be noted that after ultrasonic scanning and detection of the slurry, the slurry target ultrasonic reflection information can be obtained, wherein the slurry target ultrasonic reflection information can be formed based on the ultrasonic reflection signal during the acquisition scanning and detection, such as Figure 1In one embodiment of the present invention, the slurry target ultrasonic reflection information should include at least m groups of slurry ultrasonic reflection signal groups. The number of slurry ultrasonic reflection signal groups in the slurry target ultrasonic reflection information can be selected according to actual needs to meet the quality inspection of the slurry. For example, one slurry target ultrasonic reflection information can include three groups of slurry ultrasonic reflection signal groups. In this case, the value of m should be 3.

[0066] Specifically, when the ultrasonic probe unit is used to perform an ultrasonic scan on the slurry, a group of slurry ultrasonic reflection signal groups will be generated. Generally, each group of slurry ultrasonic reflection signal groups includes the same number of slurry ultrasonic reflection signals, wherein one slurry ultrasonic reflection signal is obtained by collecting the ultrasonic reflection signal of a probe array element 3 in the ultrasonic probe unit. Therefore, the number of slurry ultrasonic reflection signals in the slurry ultrasonic reflection signal group generally corresponds to the number of the above-mentioned configured ultrasonic probe units.

[0067] As can be seen from the above description, the slurry target ultrasonic reflection information is generated by sequentially performing m ultrasonic scans on the slurry using the ultrasonic probe unit. Therefore, the m groups of slurry ultrasonic reflection signal groups have a strict generation order, such as the corresponding generation order of the m groups of slurry ultrasonic reflection signal groups is 1, 2, ..., m. After determining the generation order of the m groups of slurry ultrasonic reflection signal groups, the reflection signal correlation array corresponding to each probe array element 3 can be calculated. The following describes the method and process of calculating the reflection signal correlation array of each probe array element.

[0068] It can be seen from the above description that for any probe array element 3 in the ultrasonic probe unit, the slurry target ultrasonic reflection information includes m slurry ultrasonic reflection signals corresponding to the probe array element 3, and the m slurry ultrasonic reflection signals belong to m groups of slurry ultrasonic reflection signal groups. Therefore, the order of the m slurry ultrasonic reflection signals corresponding to each probe array element 3 can be consistent with the generation order of the m groups of slurry ultrasonic reflection signal groups. At this time, for each probe array element 3, it can be determined that the generation order of the slurry ultrasonic reflection signals is 1, 2, ..., m.

[0069] It should be understood that each slurry ultrasonic reflection signal is generated by sampling the ultrasonic reflection signal. Generally, each slurry ultrasonic reflection signal may correspond to q sampling position points, and each sampling position point corresponds to a sampling signal value, wherein the number of sampling position points q may be selected as required, such as by setting the sampling frequency, etc., and may be based on the need to meet the slurry quality detection requirements. Generally, the number of sampling position points corresponding to each slurry ultrasonic reflection signal is the same, that is, each slurry ultrasonic reflection signal is composed of the sampling signal values ​​corresponding to the q sampling position points.

[0070] In specific implementation, based on the m slurry ultrasonic reflection signals corresponding to each probe array element 3, the reflection signal correlation array of the probe array element 3 is calculated. It can be seen from the above description that the reflection signal correlation array of each probe array element 3 should include (m-1)*q reflection signal correlation coefficients, wherein each reflection signal correlation coefficient is generated by performing a correlation operation on the sampling signal values ​​of the same sampling position point in two adjacent slurry ultrasonic reflection signals. For example, the generation order of the two adjacent slurry ultrasonic reflection signals is sequence 1 and sequence 2, respectively. When performing a correlation operation, a sampling signal value corresponding to a sampling position point is selected in the slurry ultrasonic reflection signal with sequence 1. Thereafter, a sampling signal value of the same sampling position point is selected in the slurry ultrasonic reflection signal with sequence 2. The reflection signal correlation coefficient can be obtained after correlation calculation of the two selected sampling signal values. The calculation method of each other reflection signal correlation coefficient can refer to the description here.

[0071] Since the slurry target ultrasonic reflection information includes m groups of slurry ultrasonic reflection signal groups, when the reflection signal correlation coefficient is calculated in the above manner, q reflection signal correlation coefficients can be calculated for any two adjacent slurry ultrasonic reflection signals corresponding to each probe array element 3, so that based on the m groups of slurry ultrasonic reflection signal groups, (m-1)*q reflection signal correlation coefficients corresponding to each probe array element 3 can be calculated, and a reflection signal correlation array can be formed based on the (m-1)*q reflection signal correlation coefficients. It can be understood that the reflection signal correlation array of each probe array element 3 is a two-dimensional array, and the dimension of the two-dimensional array is (m-1)*q.

[0072] In specific implementation, when calculating the correlation coefficient of the reflected signal, a feasible calculation method is:

[0073]

[0074] Wherein, ρ is the correlation coefficient of the reflected signal, x is the sampling signal value of a sampling position point in the slurry ultrasonic reflection signal, y is the sampling signal value of the same sampling position point in the adjacent slurry ultrasonic reflection signal, and conj(y) is the conjugate of the sampling signal value y.

[0075] Specifically, the sampling signal value in each slurry ultrasonic reflection signal can be represented by a complex number. Therefore, for each determined sampling signal value corresponding to the slurry ultrasonic reflection signal, the conjugate corresponding to the sampling signal value can be calculated, and then the corresponding reflection signal correlation coefficient ρ can be calculated. Generally, the sampling signal value x is collected before the sampling signal value y, that is, the generation order of the slurry ultrasonic reflection signal where the sampling signal value x is located is located in front of the generation order of the slurry ultrasonic reflection signal where the sampling signal value y is located. For example, when the generation order of the slurry ultrasonic reflection signal where the sampling signal value x is located is 1, at this time, the generation order of the slurry ultrasonic reflection signal where the sampling signal value y is located should be 2. For other situations, please refer to the description here, and no examples will be given one by one.

[0076] After the reflection signal correlation array of each probe array element 3 is calculated in the above manner, the quality state of the slurry can be determined according to the reflection signal correlation array of all probe array elements 3. Generally, the determined quality state of the slurry at least includes that there is no foreign matter 4 in the slurry or that there is foreign matter 4 in the slurry. It should be understood that when the quality state of the slurry is determined, the real-time detection of the slurry quality is achieved.

[0077] When foreign matter 4 exists in the slurry, the particle size and type of the foreign matter 4 are not fixed, resulting in different amplitudes of the ultrasonic reflection signal. Therefore, a correlation matrix of the reflection signal corresponding to each probe array element 3 is generated through correlation operation. According to the characteristics of the correlation operation, the correlation operation is more sensitive to the signal difference, and thus the foreign matter 4 in the slurry can be effectively detected. However, the correlation operation has high requirements for the frame rate of the ultrasonic reflection signal. If the frame rate is too low, it is easy to miss the difference. However, the high frame rate cannot be blindly required, otherwise it will lead to too high cost consumption. The frame rate is the frequency at which the same probe array element 3 obtains the ultrasonic reflection signals of two adjacent slurries.

[0078] It is understandable that the slurry flow speeds of different production lines are different, and the flow speeds of slurries with different formulations on the same production line are also different. Therefore, considering the actual situation, when scanning and detecting the slurry, the scanning and detection state of the ultrasonic probe unit should be adjusted according to the flow rate of the slurry to ensure that the distances of the slurry corresponding to the adjacent frame data remain unchanged. Specifically, ensuring that the distances of the slurry flow of adjacent frame data remain unchanged specifically refers to the same flow distances of the slurry determined based on the signal sampling values ​​of the same sampling position points in any two slurry ultrasonic reflection signals, such as the slurry flow distance corresponding to a signal sampling value in the slurry ultrasonic reflection signal with a generation order of 2 and the signal sampling value of the same sampling position point in the slurry ultrasonic reflection signal with a generation order of 1, should be equal to the slurry flow distance corresponding to the corresponding signal sampling value in the slurry ultrasonic reflection signal with a generation order of 3 and the corresponding sampling signal value in the slurry ultrasonic reflection signal with a generation order of 2. Here, the corresponding signal sampling value specifically refers to the same sampling position point.

[0079] Figure 1 An embodiment of adjusting the scanning detection state of the ultrasonic probe unit according to the slurry flow rate is shown in FIG. Figure 1 It can be known that the flow rate of the slurry can be measured by a velocity flow meter, and then the transmission sequence of the ultrasonic probe unit is adjusted according to the measured velocity flow value of the slurry, wherein adjusting the transmission sequence of the ultrasonic probe unit is to adjust the repetition frequency or time interval of the same probe array element 3 transmitting the ultrasonic signal to the slurry.

[0080] In one embodiment of the present invention, the repetition frequency prf of each probe array element transmitting ultrasonic waves is:

[0081]

[0082] Among them, d 异物 is the detection limit size of the ultrasonic probe unit during scanning detection, d 滤芯 is the diameter of the filter element for filtering the slurry in transit, and v is the flow rate of the slurry;

[0083] When the repetition frequency of each probe array element 3 transmitting ultrasonic waves is configured as prf, the slurry flow distances corresponding to the signal sampling values ​​at the same sampling position points in any two adjacent slurry ultrasonic reflection signals of the probe array element 3 are consistent.

[0084] Specifically, the detection limit size d when the ultrasonic probe unit performs scanning detection 异物 It is generally related to the ultrasonic scanning detection resolution of the probe array element 3 used. Generally, d 异物Generally, it can be 0.1mm. It should be noted that when the slurry is transported by the delivery pipe, a filter element can be set in the delivery pipe, and the filter element can be used to filter the slurry to improve the quality of the slurry. When the filter element is used to filter the slurry, the diameter of the filter element can be d 滤芯 , filter element diameter d 滤芯 It is generally related to the type of filter element used.

[0085] The unit of slurry flow rate v is generally mm / s, and the detection limit size d 异物 、Filter element diameter d 滤芯 The corresponding unit of measurement is mm. Therefore, according to the above method, the repetition frequency prf of each probe array element 3 emitting ultrasonic waves can be obtained. Thereafter, when the repetition frequency of each probe array element emitting ultrasonic waves is configured to be prf, the slurry flow distances corresponding to the signal sampling values ​​of the same sampling position points in any two adjacent slurry ultrasonic reflection signals of the probe array element 3 can be made consistent.

[0086] The method and process for determining the slurry quality state based on the correlation array of all reflection signals are described in detail below.

[0087] In one embodiment of the present invention, when determining the quality state of the slurry based on the reflection signal correlation array of each probe array element 3, it includes:

[0088] Based on the order of generating m groups of slurry ultrasonic reflection signal groups by ultrasonic scanning, a reflection signal correlation array of the current probe array element 3 is calculated and generated, wherein in the reflection signal correlation array, the reflection signal correlation coefficient of each column corresponds to the same sampling position point;

[0089] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when all reflection signal correlation coefficients are not lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there is no foreign matter in the area 4;

[0090] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there are n consecutive reflection signal correlation coefficients lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there is foreign matter 4 in the area, where 2≤n≤m-1;

[0091] Based on the reflection signal correlation array of all the probe array elements 3, when it is determined that there is a sampling position point corresponding to the slurry area whose quality state is that there is a foreign body 4 in the area, the quality state of the slurry is determined to be that there is a foreign body 4 in the slurry;

[0092] Based on the reflection signal correlation array of all the probe array elements 3, when the quality status of the slurry area corresponding to all the sampling position points is that the area has no foreign matter 4, the quality status of the slurry is determined to be that the slurry has no foreign matter 4.

[0093] It can be seen from the above description that the reflection signal correlation array of each probe array element 3 is a two-dimensional array. In the reflection signal correlation array, the reflection signal correlation coefficient of each column corresponds to the same sampling position point, that is, the reflection signal correlation coefficient of each column is generated by the correlation calculation of two adjacent sampling signal values ​​corresponding to the same sampling position point, such as the first reflection signal correlation coefficient of each column, which is generated by the correlation calculation of the first signal sampling value and the second signal sampling value of the same sampling position point, and the second reflection signal correlation coefficient of each column should be generated by the correlation calculation of the second signal sampling value and the third signal sampling value of the same sampling position point. Other situations are similar, and examples are not given here one by one. It can be understood that the first signal sampling value should belong to the slurry ultrasonic reflection signal with a generation number of 1, and the second signal sampling value should belong to the slurry ultrasonic reflection signal with a generation number of 2, that is, different signal sampling values ​​belong to different slurry ultrasonic reflection signals.

[0094] In one embodiment, in the reflection signal correlation array, the column numbers are 1 to q, column number 1 corresponds to the first sampling position point where the current probe array element 3 samples and generates the slurry ultrasonic reflection signal, and column number q corresponds to the qth sampling position point where the current probe array element 3 samples and generates the slurry ultrasonic reflection signal.

[0095] In a specific implementation, the distribution of the reflection signal correlation coefficients in the reflection signal correlation arrays of all the probe array elements 3 is consistent, thereby determining the reflection signal correlation array corresponding to each probe array element 3 .

[0096] It can be understood that the slurry ultrasonic reflection signal of each probe array element 3 represents the depth information of the slurry detection, that is, each sampling position point represents the information of the slurry detection. From the above description, it can be seen that a reflection signal correlation coefficient can be used to represent the situation of the slurry in two adjacent ultrasonic scans. When the reflection signal correlation coefficient is 1, it represents that there is no foreign matter 4 in the two adjacent ultrasonic scans of the current sampling position point. When the reflection signal correlation coefficient is less than 1, it represents that there is a foreign matter 4 in the two adjacent ultrasonic scans of the current sampling position point.

[0097] Generally, foreign matter 4 in the slurry may be interfering noise, bubbles or agglomerates, wherein agglomerates are larger particle aggregates formed by aggregation of small particles in the slurry. Therefore, when the quality state of the slurry in the present invention is that foreign matter 4 exists and the foreign matter 4 is not interfering noise, the foreign matter 4 should generally be agglomerates or bubbles.

[0098] In order to meet the universality of foreign body 4 detection, a reflection signal correlation coefficient threshold can be set. Generally, the reflection signal correlation coefficient threshold can be a value close to 1, such as the reflection signal correlation coefficient threshold can generally be set to 0.8. Of course, the reflection signal correlation coefficient threshold can also be set to other values, which is based on whether it can meet the detection accuracy requirements for the slurry. After setting the reflection signal correlation coefficient threshold, when the reflection signal correlation coefficient is not less than the reflection signal correlation coefficient threshold, it can be considered that the current reflection signal correlation coefficient can be regarded as satisfying the above "state when the reflection signal correlation coefficient is 1", which means that there is no foreign body 4; when the reflection signal correlation coefficient is lower than the reflection signal correlation coefficient threshold, it can be considered that the current reflection signal correlation coefficient can satisfy the above "state when the reflection signal correlation coefficient is less than 1", which means that there is a foreign body 4.

[0099] It should be understood that when ultrasonic scanning is performed on the slurry, the position of each probe array element 3 remains fixed, so each probe array element 3 corresponds to a slurry area in the slurry, and the corresponding slurry area should be related to the position of the probe array element 3. At the same time, each sampling position point reflects the depth state of the corresponding slurry area. In one embodiment of the present invention, the reflection signal correlation array of each probe array element 3 is calculated. When the correlation coefficients of all reflection signals are not lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current probe array element 3 is that there is no foreign matter 4 in the area.

[0100] For the m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there are n consecutive reflection signal correlation coefficients lower than the reflection signal correlation coefficient threshold value, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there is foreign matter 4 in the area, wherein there are n consecutive reflection signal correlation coefficients, specifically refers to the same column in the reflection signal correlation array, and the n reflection signal correlation coefficients are arranged continuously, such as the n consecutive reflection signal correlation coefficients may be the first reflection signal correlation coefficient in the current column to the nth reflection signal correlation coefficient in the current column, or may be the second reflection signal correlation coefficient in the current column to the n+1th reflection signal correlation coefficient in the current column. The continuous state of the n reflection signal correlation coefficients may be determined according to actual conditions, and please refer to the description here for details.

[0101] In specific implementation, n should be at least 2. When n is 2, among the m-1 reflection signal correlation coefficients in the same column, there are at least two consecutive reflection signal correlation coefficients that are lower than the reflection signal correlation coefficient threshold. When n is other values, please refer to the corresponding instructions here.

[0102] It can be seen from the above description that the quality state of the slurry area in the corresponding slurry is determined by a probe array element 3. After the quality state of the slurry area corresponding to each probe array element 3 is determined, the quality state of the slurry under the current slurry target ultrasonic reflection information can be further determined according to the quality state of the slurry area corresponding to all probe array elements 3. Generally, as long as there is a sampling position point corresponding to the slurry area whose quality state is that there is foreign matter 4 in the area, the quality state of the slurry is determined to be that there is foreign matter 4 in the slurry; when the quality states of the slurry areas corresponding to all sampling position points of all slurry ultrasonic reflection signals are that there is no foreign matter 4 in the area, the quality state of the slurry is determined to be that there is no foreign matter 4 in the slurry.

[0103] In one embodiment of the present invention, when determining the quality state of the slurry based on the reflection signal correlation array of each probe array element 3, it also includes:

[0104] For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there is a reflection signal correlation coefficient lower than the reflection signal correlation coefficient threshold, and the number of reflection signal correlation coefficients that are continuously lower than the reflection signal correlation coefficient threshold is less than n, it is determined that there is interference noise in the quality state of the slurry area corresponding to the current probe array element 3;

[0105] When it is determined that the quality state of the slurry area is that interference noise exists, the existing interference noise is eliminated.

[0106] It can be seen from the above description that in order to effectively detect the slurry, the scanning frame rate of each probe array element 3 is configured. Since the frame rate of the scanning detection is high enough, for the m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there are n consecutive reflection signal correlation coefficients lower than the reflection signal correlation coefficient threshold, it can be determined that the area corresponding to the slurry is the area where there is foreign matter 4. On the contrary, according to electronic interference and noise randomness, it often appears only once in a row at the same position and will not continue to appear. Therefore, when the number of reflection signal correlation coefficients that are continuously lower than the reflection signal correlation coefficient threshold is less than n, it can be determined that there is interference noise in the quality state of the corresponding slurry area.

[0107] In specific implementation, when it is determined that the quality state of the slurry is that there is interference noise, the existing interference noise should be eliminated. Excluding the interference noise is as follows: Figure 1 In the process of eliminating interference noise signals, the interference noise can be ignored. It can be understood that after eliminating the interference noise, the accuracy of slurry quality detection can be improved.

[0108] It can be understood that since the slurry is in a flowing state, when the slurry is subjected to quality inspection, a plurality of slurry target ultrasonic reflection information will be generated through scanning inspection by the ultrasonic probe unit, wherein the state of each slurry target ultrasonic reflection information should be consistent, such as each slurry target ultrasonic reflection information includes m groups of slurry ultrasonic reflection signal groups.

[0109] It should be noted that there will be some identical slurry ultrasonic reflection signal groups in the ultrasonic reflection information of two adjacent slurry targets. For example, the two adjacent slurry target ultrasonic reflection information are respectively called the previous slurry target ultrasonic reflection information and the next slurry target ultrasonic reflection information. When the next slurry target ultrasonic reflection information is formed, the slurry ultrasonic reflection signal group ranked 2 to m in the previous slurry target ultrasonic reflection information may be included. At this time, the slurry ultrasonic reflection signal group ranked 2 in the previous slurry target ultrasonic reflection information should be ranked 1 in the next slurry target ultrasonic reflection information, and the other corresponding rankings are adjusted in turn.

[0110] In specific implementation, the situation of the slurry target ultrasonic reflection information can refer to the above description. After obtaining new slurry target ultrasonic reflection information, the above processing is performed on the new slurry target ultrasonic reflection information, that is, the reflection signal correlation array corresponding to each probe array element 3 is calculated, and the reflection signal correlation array corresponding to each probe array element 3 is calculated. The method of determining the slurry quality state based on the reflection signal correlation array can refer to the above corresponding description, which will not be repeated here.

[0111] In one embodiment of the present invention, an ultrasonic probe unit is arranged in the conveying direction of the slurry, wherein:

[0112] The ultrasonic probe unit includes two ultrasonic linear array probes, probe array elements 3 are distributed on the ultrasonic linear array probes, and the distribution direction of the probe array elements 3 on each ultrasonic linear array probe is perpendicular to the conveying direction of the slurry;

[0113] When the quality state of the slurry area is determined to be the presence of foreign matter 4 in the slurry based on the reflection signal correlation array of at least one probe array element 3, the slurry is subjected to foreign matter state analysis processing to determine the length of the foreign matter 4 in the slurry after the foreign matter state analysis processing.

[0114] Figure 3 and Figure 4An embodiment of the ultrasonic probe unit used in the present invention is shown in the figure, wherein the two ultrasonic linear array probes in the ultrasonic probe unit are respectively a first ultrasonic linear array probe 1 and a second ultrasonic linear array probe 2, wherein when scanning and detecting the slurry, the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2 are parallel to each other, and a plurality of probe array elements 3 are arranged in the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2. Generally, the number of probe array elements 3 in the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2 is preferably equal, and the arrangement directions of the plurality of probe array elements 3 are consistent.

[0115] It is understandable that the number of probe array elements 3 is based on the need to effectively cover the ultrasonic scanning of the slurry. The number of slurry ultrasonic reflection signals in each group of slurry ultrasonic reflection signals should be consistent with the total number of probe array elements 3 included in the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2.

[0116] In a specific implementation, when the slurry is transported, the transport direction of the slurry is perpendicular to the arrangement direction of the probe array elements 3 and the corresponding connection direction between the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2. Figure 3 and Figure 4 In the process, the slurry is transported in a direction perpendicular to Figure 3 and Figure 4 conveying in the direction of. Figure 6 An embodiment of constructing a coordinate system based on an ultrasonic probe unit and a slurry conveying direction is shown in the figure, wherein the x direction is the arrangement direction of the plurality of probe array elements 3, the y direction is the direction of the line connecting the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2, and the z direction is the slurry conveying direction.

[0117] It should be noted that when two ultrasonic linear array probes are used for scanning and detection, the ultrasonic scanning method of the probe array elements in the ultrasonic linear array probe includes vertical offset scanning or inclined cross scanning, wherein: Figure 3 An embodiment of vertical staggered scanning is shown in FIG. Figure 4 An embodiment of the inclined cross scanning is shown in FIG. The following is an example of how the ultrasonic probe unit scans and detects the slurry.

[0118] Specifically, when scanning and detecting the slurry, the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2 can be configured in an aligned state. At this time, the probe array elements 3 at corresponding positions in the first ultrasonic linear array probe 1 and the second ultrasonic linear array probe 2 can be in an aligned arrangement state or in a staggered arrangement state. Figure 3 and Figure 4 An embodiment of the staggered arrangement is shown in FIG.

[0119] During ultrasonic detection scanning, the probe array elements 3 in the same ultrasonic linear array probe should sequentially transmit ultrasonic signals to the slurry, and then receive the slurry ultrasonic reflection signals reflected by the slurry. Figure 3 and Figure 4 The probe array elements 3 are configured from left to right in sequence to transmit ultrasonic reflection signals in turn and receive corresponding slurry ultrasonic reflection signals. Generally, after the probe array elements 3 in the two ultrasonic linear array probes transmit ultrasonic signals to the slurry and receive corresponding slurry ultrasonic reflection signals, an ultrasonic scan is completed. It can be seen from the above description that a group of slurry ultrasonic reflection signal groups can be obtained at this time, and the number of slurry ultrasonic reflection signals in the slurry ultrasonic reflection signal group is consistent with the total number of all probe array elements 3 in the ultrasonic probe unit.

[0120] Figure 3 , a state of vertical misalignment scanning is shown, in which the ultrasonic signal emitted by the probe array element 3 is perpendicular to the direction in which the probe array elements 3 are arranged in the ultrasonic linear array probe; Figure 4 FIG. 1 shows a state of inclined cross scanning, in which the ultrasonic signal emitted by the probe array element 3 is in an inclined state, that is, not perpendicular to the arrangement direction of the probe array element 3. It should be noted that when using Figure 3 When using the vertical staggered scanning method, the line density can be increased, the imaging quality can be higher, and the imaging resolution can be improved; when using Figure 4 When the tilted cross scanning is performed, the speckle noise can be suppressed, the imaging quality can be further improved, the noise interference can be reduced, and the success rate of detecting foreign matter 4 in the slurry can be increased.

[0121] It should be noted that, during an ultrasonic scanning process, all probe array elements 3 should adopt the same scanning method, such as vertical offset scanning or inclined cross scanning. During ultrasonic scanning, the probe array elements 3 can be configured to emit vertical ultrasonic signals or inclined ultrasonic signals by using commonly used technical means in the technical field. The specific configuration scanning method will not be described here by example.

[0122] Specifically, the quality state of the slurry area is determined to be the presence of foreign matter 4 in the slurry based on the reflection signal correlation array of at least one probe array element 3, that is, based on the ultrasonic reflection information of a slurry target, the quality state of the slurry area can be determined to be the presence of foreign matter 4 in the slurry, wherein the manner of determining the quality state of the slurry area as the presence of foreign matter 4 in the slurry can refer to the corresponding description above. When there is foreign matter 4 in the slurry, it can be known from the above description that the foreign matter 4 can be agglomerates or bubbles, and the slurry is subjected to foreign matter state analysis processing to determine the size of the foreign matter 4 in the slurry after the foreign matter state analysis processing.

[0123] In one embodiment of the present invention, when performing abnormal state analysis and processing, it includes:

[0124] Based on the reflection signal correlation array of the probe array element 3, the correlation coefficient statistics of each sampling position point are calculated, and the probe array element correlation coefficient statistics information is generated based on the correlation coefficient statistics of each sampling position point, wherein:

[0125] For the reflection signal correlation coefficient of any sampling position point, when the reflection signal correlation coefficient is lower than the reflection signal correlation coefficient threshold, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 1; otherwise, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 0;

[0126] Adding all correlation coefficient state identification signals corresponding to the same sampling position point, and taking the accumulated value of all correlation coefficient state identification signals as the correlation coefficient statistical value of the current sampling position point;

[0127] Generate probe array element correlation coefficient statistics based on correlation coefficient statistics of all sampling position points;

[0128] For the probe element correlation coefficient statistical information of any probe element 3, when any correlation coefficient statistical value in the probe element correlation coefficient statistical information is not lower than the correlation coefficient statistical threshold, a sampling position point corresponding to the correlation coefficient statistical value is configured as a target sampling position point;

[0129] For each slurry target ultrasonic reflection information, all target sampling position points are clustered to determine the centroid position of all foreign bodies 4 corresponding to the current slurry target ultrasonic reflection information after clustering processing;

[0130] For any two adjacent slurry target ultrasonic reflection information, the centroid positions of the bubbles corresponding to the two slurry target ultrasonic reflection information are compared and analyzed to determine the continuous scanning detection number of each foreign body 4 after the comparison and analysis;

[0131] Based on the number of consecutive scan detections of each foreign object 4, the length of the foreign object 4 is calculated.

[0132] As can be seen from the above description, for each slurry target ultrasonic reflection information, the reflection signal correlation array of each probe array element 3 can be calculated. As in the above description, the reflection signal correlation array of each probe array element 3 includes (m-1)*q reflection signal correlation coefficients, and the (m-1)*q reflection signal correlation coefficients are arranged in a two-dimensional array. Based on the reflection signal correlation array of each probe array element 3, the probe array element correlation coefficient statistical information should be calculated.

[0133] In order to calculate the correlation coefficient statistics of each sampling position point, the correlation coefficient state identification signal corresponding to each reflection signal correlation coefficient should be determined. Specifically, when determining the value of the correlation coefficient state identification signal, the reflection signal correlation coefficient should be compared with the reflection signal correlation coefficient threshold. If the reflection signal correlation coefficient is lower than the reflection signal correlation coefficient threshold, the corresponding correlation coefficient state identification signal value is configured to 1; otherwise, the correlation coefficient state identification signal value is configured to 0, thereby obtaining m-1 correlation coefficient state identification signals corresponding to each sampling position point.

[0134] For any sampling position point, after obtaining the m-1 correlation coefficient state identification signals corresponding to the sampling position point, the m-1 correlation coefficient state identification signals can be accumulated, and the accumulated value can be used as the correlation coefficient statistic of the current sampling position point. In specific implementation, when the values ​​of the m-1 correlation coefficient state identification signals are all 1, the corresponding correlation coefficient statistic should be m-1; when the values ​​of the m-1 correlation coefficient state identification signals are all 0, the corresponding correlation coefficient statistic should be 0. When the values ​​of the m-1 correlation coefficient state identification signals are other cases, the corresponding correlation coefficient statistic can be calculated, and examples are not given one by one here.

[0135] For the reflection signal correlation array of each probe array element 3, the probe array element correlation coefficient statistical information corresponding to each reflection signal correlation array can be calculated by the above method. From the above description, it can be seen that the probe array element correlation coefficient statistical information includes q correlation coefficient statistical values, and one correlation coefficient statistical value corresponds to one sampling position point. It can be understood that the number of correlation coefficient statistical values ​​in the probe array element correlation coefficient statistical information is consistent with the number of sampling position points of each slurry ultrasonic reflection signal, and the relevant information statistical values ​​are in one-to-one correspondence with the sampling position points.

[0136] For the correlation coefficient statistical information of each probe array element, when any correlation coefficient statistical value is not lower than the correlation coefficient statistical threshold, the sampling position point corresponding to the correlation coefficient statistical value is configured as the target sampling position point. Specifically, the correlation coefficient statistical threshold can be selected as needed, such as the correlation coefficient statistical threshold can be m-1, m-2 or m-3, which is related to the value of m and the accuracy requirement of slurry ultrasonic detection. For example, the correlation coefficient statistical threshold can be set to m-1.

[0137] It can be understood that when the sampling position point is configured as a target sampling position point, it can be determined that the quality state of the slurry area determined by the current target sampling position point is that the slurry has foreign matter 4. After all the target sampling position points are determined, the position coordinates of the target sampling position points are clustered, so that the centroid positions of all foreign matter 4 can be determined after the clustering process. Specifically, it can be known from the above description that the foreign matter 4 can generally be agglomerates or bubbles.

[0138] In one embodiment of the present invention, clustering processing is performed on all target sampling location points, and the clustering processing method includes one of meanshift algorithm, k-means clustering, hierarchical clustering, DBSCAN clustering, GMM clustering, spectral clustering or OPTICS clustering.

[0139] It is understandable that during clustering, the clustering algorithm used can be selected as needed to meet the needs of clustering analysis. The corresponding clustering methods and clustering processes of meanshift algorithm, k-means clustering, hierarchical clustering, DBSCAN clustering, GMM clustering, spectral clustering, and OPTICS clustering can be consistent with the existing cardinality and will not be repeated here.

[0140] It should be noted that, based on the distribution of the sampling position points and the size of the foreign matter 4 in the slurry, a clustering threshold should be set, and then the clustering analysis method can cluster the position coordinates of the target sampling position points, so that the corresponding cluster position can be determined after clustering, wherein the cluster position is the centroid position of a foreign matter 4. In specific implementation, for each target sampling position point, the position coordinates of the target sampling position point can be determined by the technical means commonly used in the technical field, and then clustering processing can be performed, wherein the method and process of clustering analysis of the position coordinates of the target sampling position points can be consistent with the prior art, and will not be repeated here.

[0141] In specific implementation, the above operation is performed for each slurry target ultrasonic reflection information, and the centroid position of each slurry ultrasonic reflection information corresponding to the foreign body 4 can be obtained. Thereafter, for any two adjacent slurry target ultrasonic reflection information, the centroid positions of the two slurry target ultrasonic reflection information corresponding to the foreign body 4 are compared and analyzed, such as Figure 2 As shown, Figure 2 In the input of two adjacent centroid position coordinates each time, specifically, the centroid positions of the foreign bodies corresponding to the ultrasonic reflection information of two adjacent slurry targets are input, that is, the centroid positions of the two input foreign bodies 4 should correspond to the ultrasonic reflection information of two adjacent slurry targets respectively.

[0142] When conducting comparative analysis, the main thing is to determine the number of continuous scans for each foreign body. Figure 2 A schematic diagram of an embodiment of the present invention for comparative analysis is shown in FIG. Figure 2It can be seen that when performing comparative analysis, comparative analysis conditions should be set, and the comparative analysis conditions can be: whether the adjacent time corresponding to the two foreign bodies 4 is the interval time PRI, and whether the length of the two foreign body center positions meets the comparative analysis threshold; specifically, the comparative analysis threshold is generally related to the situation of the foreign bodies 4 in the slurry, such as the comparative analysis threshold can be set to 0.1mm, and the interval time PRI can be calculated in the following way, and the specific details can be referred to the corresponding description below. It can be understood that when there are multiple foreign bodies 4, a corresponding comparative analysis should be performed on each foreign body 4, and the comparative analysis situation can be referred to the description here.

[0143] Depend on Figure 2 It can be seen that for any foreign body 4, when it does not satisfy Figure 2 When the comparative analysis conditions shown in , the continuous scanning detection number of the current foreign body 4 is output, Figure 2 The num in is the number of continuous scan detections. Figure 2 When the comparative analysis conditions shown in , the comparative analysis should be maintained. For example, a comparative analysis is currently performed on the foreign matter 4 corresponding to the first slurry target ultrasonic reflection information and the second slurry target ultrasonic reflection information. When the comparative analysis conditions are met, the foreign matter 4 corresponding to the second slurry target ultrasonic reflection information and the third slurry target ultrasonic reflection information should be subjected to corresponding comparative analysis until the comparative analysis conditions are no longer met, and the continuous scanning detection number of each foreign matter 4 is obtained.

[0144] It should be noted that if the ultrasonic reflection information of a certain slurry target determines that there is no foreign body 4 in the slurry, then when performing the above comparative analysis, it can be determined that the above comparative analysis conditions are not met. When the slurry quality is detected in real time, the above process is repeated to determine the quality state of the slurry. When foreign bodies are present, the continuous scanning detection number of each foreign body 4 can be determined, and then the length of the foreign body 4 can be calculated based on the continuous scanning detection number.

[0145] In one embodiment of the present invention, when it is determined that there is a foreign body 4 in the slurry, the length of the foreign body 4 is calculated based on the time trajectory of the foreign body 4, and then:

[0146]

[0147] Wherein, dd is the length of the foreign body 4, v is the flow rate of the slurry, num is the number of continuous scanning detections, and prf is the repetition frequency of each probe array element in the ultrasonic linear array probe emitting ultrasonic waves.

[0148] From the above description, it can be known that the quality state in the slurry can be qualitatively analyzed according to the correlation array of the reflection signal of each probe array element 3. When it is determined that there is a foreign body 4, the size of the foreign body 4 cannot be determined. When the above foreign body state analysis process is adopted, the length of the foreign body 4 can be calculated according to the foreign body time trajectory.

[0149] Specifically, the frequency prf of ultrasonic waves emitted by each probe element 3 in the ultrasonic linear array probe can be determined by referring to the operation of the ultrasonic probe unit configured above, and the flow rate v of the slurry can be measured by the velocity flow meter described above. It can be seen from the description of the foreign body state analysis and processing that the number of continuous scanning detections of each foreign body 4 can be counted after the foreign body state analysis and processing. It can be seen from the above description that after the foreign body state analysis and processing, the length of the foreign body 4 can be calculated based on the foreign body time trajectory. Generally, the unit of measurement of the length of the foreign body 4 is mm.

[0150] As can be seen from the above description, the foreign matter 4 can generally be agglomerates or bubbles. Figure 5 An embodiment of determining the length of the foreign body 4 is shown in FIG.

[0151] In summary, a real-time detection system for slurry quality includes an ultrasonic probe unit and an ultrasonic detection processing device, wherein:

[0152] Performing ultrasonic testing on the slurry using an ultrasonic probe unit to generate target ultrasonic reflection information of the slurry after scanning and testing;

[0153] The ultrasonic detection and processing device processes the ultrasonic reflection information of the slurry target using the detection method described above to determine the quality status of the slurry.

[0154] Specifically, the ultrasonic detection processing device can be an existing commonly used microprocessor, such as an FPGA, etc. The type of the ultrasonic detection processing device can be selected according to the needs, so as to cooperate with the ultrasonic probe unit to realize the detection of the slurry quality. The situation of the ultrasonic probe unit can refer to the corresponding description above. It can be seen from the above description that the ultrasonic probe unit can be used to obtain the slurry target ultrasonic reflection signal. Thereafter, the ultrasonic detection processing device can process the slurry target ultrasonic reflection information to determine the quality state of the slurry. The method and process of determining the quality state of the slurry can refer to the above description.

[0155] It should be noted that the ultrasonic detection and processing device can also be used to set an ultrasonic probe unit to perform ultrasonic scanning of the slurry. For example, the ultrasonic probe unit can be configured to use the above-mentioned vertical offset scanning or inclined cross scanning. The specific configuration method of the ultrasonic probe unit can be consistent with the prior art and will not be repeated here.

Claims

1. A real-time detection method for slurry quality, characterized in that: The real-time detection method comprises: An ultrasonic probe unit is configured to scan and detect the slurry to generate slurry target ultrasonic reflection information after scanning and detecting, wherein: The target ultrasonic reflection information of the slurry includes at least m groups of ultrasonic reflection signal groups of the slurry, wherein the m groups of ultrasonic reflection signal groups of the slurry are respectively generated by performing ultrasonic scanning on the slurry m times in sequence using an ultrasonic probe unit. For any slurry ultrasonic reflection signal group, the slurry ultrasonic reflection signal group includes a plurality of slurry ultrasonic reflection signals, wherein one slurry ultrasonic reflection signal is collected by one probe array element in the ultrasonic probe unit; Based on the m groups of slurry ultrasonic reflection signal groups and the generation order of the m groups of slurry ultrasonic reflection signal groups, a reflection signal phase relationship array corresponding to each probe array element is calculated, wherein: For any reflection signal correlation array, it includes (m-1)*q reflection signal correlation coefficients, wherein each reflection signal correlation coefficient is generated by the sampling signal values ​​corresponding to two adjacent slurry ultrasonic reflection signals through correlation operation, and q is the number of sampling points of each slurry ultrasonic reflection signal; The quality state of the slurry is determined based on an array of reflection signal correlations of all probe array elements, wherein the quality state of the slurry includes that there is no foreign matter in the slurry or that there is foreign matter in the slurry.

2. The real-time detection method of slurry quality according to claim 1 is characterized in that: Based on the reflection signal correlation array of each probe array element, the quality status of the slurry is determined, including: Based on the order of generating m groups of slurry ultrasonic reflection signal groups by ultrasonic scanning, a reflection signal correlation array of the current probe array element is calculated and generated, wherein in the reflection signal correlation array, the reflection signal correlation coefficient of each column corresponds to the same sampling position point; For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when all reflection signal correlation coefficients are not lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there is no foreign matter in the area; For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there are n consecutive reflection signal correlation coefficients lower than the reflection signal correlation coefficient threshold, it is determined that the quality state of the slurry area corresponding to the current sampling position point is that there are foreign objects in the area, where 2≤n≤m-1; Based on the correlation array of the reflected signals of all the probe array elements, when it is determined that there is a sampling position point corresponding to the slurry area with a quality state that the area has foreign matter, the quality state of the slurry is determined to be the slurry with foreign matter; Based on the correlation array of the reflected signals of all the probe array elements, when the quality status of the slurry area corresponding to all the sampling position points is that the area has no foreign matter, it is determined that the quality status of the slurry is that the slurry has no foreign matter.

3. The real-time detection method of slurry quality according to claim 2 is characterized in that: Based on the reflection signal correlation array of each probe array element, the quality state of the slurry is determined, which also includes: For m-1 reflection signal correlation coefficients belonging to the same sampling position point, when there is a reflection signal correlation coefficient lower than the reflection signal correlation coefficient threshold, and the number of reflection signal correlation coefficients that are continuously lower than the reflection signal correlation coefficient threshold is less than n, it is determined that there is interference noise in the quality state of the slurry area corresponding to the current probe array element 3; When it is determined that the quality state of the slurry area is that interference noise exists, the existing interference noise is eliminated.

4. The real-time detection method of slurry quality according to claim 2 is characterized in that: An ultrasonic probe unit is arranged in the conveying direction of the slurry, wherein: The ultrasonic probe unit includes two ultrasonic linear array probes, probe array elements are distributed on the ultrasonic linear array probes, and the distribution direction of the probe array elements on each ultrasonic linear array probe is perpendicular to the conveying direction of the slurry; When the quality state of the slurry area is determined to be abnormal in the slurry based on the correlation array of the reflected signal of at least one probe array element, the slurry is subjected to abnormal state analysis processing. When it is determined after the abnormal state analysis processing that the abnormality in the slurry is foreign matter in the slurry, the length of the foreign matter is calculated.

5. The real-time detection method of slurry quality according to claim 4 is characterized in that: When analyzing and processing abnormal conditions, it includes: Based on the correlation array of the reflected signal of the probe array element, the correlation coefficient statistics of each sampling position point are calculated, and the correlation coefficient statistics of the probe array element are generated based on the correlation coefficient statistics of each sampling position point, wherein, For the reflection signal correlation coefficient of any sampling position point, when the reflection signal correlation coefficient is lower than the reflection signal correlation coefficient threshold, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 1; otherwise, the correlation coefficient state identification signal corresponding to the current reflection signal correlation coefficient is configured to 0; Adding all correlation coefficient state identification signals corresponding to the same sampling position point, and taking the accumulated value of all correlation coefficient state identification signals as the correlation coefficient statistical value of the current sampling position point; Generate probe array element correlation coefficient statistics based on correlation coefficient statistics of all sampling position points; For probe element correlation coefficient statistical information of any probe element, when any correlation coefficient statistical value in the probe element correlation coefficient statistical information is not lower than the correlation coefficient statistical threshold, configuring a sampling position point corresponding to the correlation coefficient statistical value as a target sampling position point; For each slurry target ultrasonic reflection information, all target sampling position points are clustered to determine the centroid position of all foreign bodies corresponding to the current slurry target ultrasonic reflection information after clustering processing; For any two adjacent slurry target ultrasonic reflection information, the centroid positions of the bubbles corresponding to the two slurry target ultrasonic reflection information are compared and analyzed to determine the continuous scanning detection number of each foreign object after the comparison and analysis; Based on the number of consecutive scan detections of each foreign object, the length of the foreign object is calculated.

6. The real-time detection method of slurry quality according to claim 5 is characterized in that: All target sampling locations are clustered, and the clustering method includes one of meanshift algorithm, k-means clustering, hierarchical clustering, DBSCAN clustering, GMM clustering, spectral clustering or OPTICS clustering.

7. The real-time detection method of slurry quality according to claim 5 is characterized in that: When it is determined that there is foreign matter in the slurry, the length of the foreign matter is calculated based on the time trajectory of the foreign matter, and then: Wherein, dd is the length of the foreign body, v is the flow rate of the slurry, num is the number of continuous scanning detections, and prf is the repetition frequency of each probe array element in the ultrasonic linear array probe emitting ultrasonic waves.

8. The real-time detection method of slurry quality according to claim 7 is characterized in that: For each probe array element, the repetition frequency prf of transmitting ultrasonic waves is: Among them, d 异物 is the detection limit size of the ultrasonic probe unit during scanning detection, d 滤芯 is the diameter of the filter element for filtering the slurry in transit, and v is the flow rate of the slurry; When the repetition frequency of each probe array element transmitting ultrasonic waves is configured as prf, the slurry flow distances corresponding to the signal sampling values ​​at the same sampling position points in any two adjacent slurry ultrasonic reflection signals of the probe array element are consistent.

9. The real-time detection method of slurry quality according to any one of claims 4 to 8, characterized in that: When two ultrasonic linear array probes are used for scanning and testing, the ultrasonic scanning mode of the probe array elements in the ultrasonic linear array probes includes vertical offset scanning or inclined cross scanning.

10. A real-time detection system for slurry quality, characterized in that: It includes an ultrasonic probe unit and an ultrasonic detection processing device, wherein: Performing ultrasonic testing on the slurry using an ultrasonic probe unit to generate target ultrasonic reflection information of the slurry after scanning and testing; The ultrasonic detection and processing device processes the ultrasonic reflection information of the slurry target using the detection method described in any one of claims 1 to 9 to determine the quality status of the slurry.

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