A method and device for testing the stability of ultrasonic 3D scanning detection signals

Abstract

The present application relates to the technical field of composite material detection, and in particular to a method and device for testing the stability of ultrasonic 3D scanning detection signals. The ultrasonic 3D scanning detection signal stability testing method includes: fixing the composite material blade to be detected between a receiving transducer and a transmitting transducer for ultrasonic 3D scanning; moving the receiving transducer and the transmitting transducer to a set detection position point according to a set ultrasonic 3D scanning trajectory; acquiring multiple ultrasonic signals at each detection position point according to a set time difference, and determining the statistical values of the multiple ultrasonic signals, the statistical values including the mean, maximum and minimum values; determining the stability coefficient of each detection position point according to the statistical values, and grading the ultrasonic signal stability according to the mean of the stability coefficients of all detection position points. The present application can solve the problem of the difficulty in dynamic quantitative evaluation of ultrasonic 3D scanning imaging detection signals of composite material parts in real scenarios, and improve the accuracy of ultrasonic 3D scanning detection.

Description

Technical Field

[0001] The present application relates to the technical field of composite material detection, and in particular to a method and device for testing the stability of ultrasonic 3D scanning detection signals. Background Art

[0002] Composite blades are widely used in aero-engine manufacturing and are considered key components. These critical composite components often have very complex geometric shapes and internal laminate structures, requiring automated ultrasonic scanning inspection for quality and safety reasons.

[0003] Ultrasonic automated scanning testing requires water coupling and complex ultrasonic automated scanning equipment to capture test signals from composite blades. The signals from ultrasonic automated scanning are typically in the millivolt range and are particularly susceptible to influences such as water coupling, environmental electrical interference, and the misalignment of the probe and the composite blade during scanning. The larger and more complex the composite blade being tested, the harsher the electrical environment of the ultrasonic equipment, and the poorer the water coupling, the more severe the impact on the test signal, potentially resulting in inaccurate ultrasonic automated scanning results. These influences are particularly pronounced during ultrasonic 3D scanning of composite blades.

[0004] At present, in some ultrasonic 3D scanning equipment and detection practices, one method is to use homogeneous materials, such as organic glass plates, to evaluate the stability of ultrasonic signals. However, there is no comprehensive evaluation method and quantitative grading model for the detection signal stability in the actual ultrasonic 3D scanning scenario of composite blades being inspected. This has also affected the ultrasonic 3D automatic scanning detection effect and the accuracy of the detection results of composite blades. Summary of the Invention

[0005] The present application provides a method and device for testing the stability of an ultrasonic 3D scanning detection signal to solve the problems in the above-mentioned background technology.

[0006] In a first aspect, the present application provides a method for testing the stability of an ultrasonic 3D scanning detection signal, comprising:

[0007] The composite blade to be inspected is fixed between the receiving transducer and the transmitting transducer for ultrasonic 3D scanning;

[0008] Move the receiving transducer and transmitting transducer to the set detection position according to the set ultrasonic 3D scanning trajectory;

[0009] Acquire multiple ultrasonic signals at each detection position point according to the set time difference, and determine statistical values of the multiple ultrasonic signals, wherein the statistical values include a mean value, a maximum value, and a minimum value;

[0010] The stability coefficient of each detection position point is determined according to the statistical value, and the stability of the ultrasonic signal is graded according to the mean value of the stability coefficients of all the detection position points.

[0011] Furthermore, before the receiving transducer and the transmitting transducer are moved to the set detection position point according to the set ultrasonic 3D scanning trajectory, the method further includes:

[0012] Generate ultrasonic 3D scanning trajectory using scanning unit and , Two adjacent ultrasonic 3D scanning tracks and Stepping;

[0013] Determine the number of detection points , .

[0014] Furthermore, before acquiring multiple ultrasonic signals at each detection position point according to the set time difference, the method further includes:

[0015] According to the set ultrasound display reference value Determine the ultrasonic signal of the receiving transducer and transmits the ultrasonic signal of the transducer , .

[0016] Furthermore, the time difference , Indicates the distance between two adjacent detection points. is the ultrasonic 3D scanning speed of the transmitting transducer and the receiving transducer, is the acquisition coefficient.

[0017] Furthermore, determining the statistical values of the plurality of ultrasound signals includes:

[0018] Find each detection position point Corresponding Ultrasonic signal and or The mean , minimum value , maximum value .

[0019] Furthermore, determining the stability coefficient of each detection position point according to the statistical value includes:

[0020] Find Ultrasonic signal and or Chinese Satisfaction Number of , ;

[0021] According to the formula Calculate each detection position point Ultrasonic signal and or The stability coefficient .

[0022] Furthermore, the grading of the ultrasonic signal stability according to the mean value of the stability coefficient of all detection positions includes:

[0023] If the mean stability coefficient If it is greater than or equal to the first set value, it is rated as Class A, indicating that the ultrasonic signal is very stable;

[0024] If the mean stability coefficient If it is greater than or equal to the second set value and less than the first set value, it is evaluated as Class B, indicating that the ultrasonic signal is stable;

[0025] If the mean stability coefficient If it is greater than or equal to the third set value and less than the second set value, it is evaluated as Class C, indicating that the ultrasonic signal is relatively stable;

[0026] If the mean stability coefficient If it is greater than or equal to the fourth set value and less than the third set value, it is evaluated as Class D, indicating that the ultrasonic signal is basically stable;

[0027] If the mean stability coefficient If it is less than the fourth set value, it is evaluated as Class E, indicating that the ultrasonic signal is unstable.

[0028] In a second aspect, the present application provides an ultrasonic 3D scanning detection signal stability testing device, which is used to implement the ultrasonic 3D scanning detection signal stability testing method described above; the ultrasonic 3D scanning detection signal stability testing device includes a receiving transducer, a transmitting transducer, and a scanning unit;

[0029] The receiving transducer is used to receive the transmission signal from the composite material blade being tested The transmitting transducer is used to transmit ultrasonic signals to the composite blade being tested. , and is used to receive ultrasonic reflection signals from the composite blade being tested ;

[0030] The scanning unit is used to generate an ultrasonic 3D scanning trajectory of the composite blade being inspected , driving the receiving transducer and the transmitting transducer to perform ultrasonic 3D scanning on the composite material blade being inspected according to the generated scanning trajectory.

[0031] Furthermore, it also includes an ultrasound unit, an imaging unit and a water coupling unit;

[0032] The ultrasonic unit is used to provide a receiving signal to the receiving transducer and Preprocessing and digital conversion, providing the transmitting transducer with the transmitting signal and Preprocessing and digital transformation;

[0033] The imaging unit is used to construct a detection position point and ultrasonic reflection signal and ultrasound transmission signal The mapping relationship between them is generated, and the ultrasonic reflection detection signal point cloud is generated. and ultrasonic transmission detection signal point cloud , and based on and Record and display ultrasonic test results;

[0034] The water coupling unit is used to provide water spray coupling for the receiving transducer and the transmitting transducer.

[0035] Furthermore, the scanning unit is also used to provide the imaging unit with position signals of the receiving transducer and the transmitting transducer.

[0036] The above technical solution of this application has the following advantages:

[0037] The first aspect of the present application provides a method for testing the stability of ultrasonic 3D scanning detection signals. By fixing the composite blade to be inspected between a receiving transducer and a transmitting transducer for ultrasonic 3D scanning, the receiving transducer and the transmitting transducer are moved to a set detection position point according to a set ultrasonic 3D scanning trajectory, multiple ultrasonic signals of each detection position point are obtained according to a set time difference, and statistical values of the multiple ultrasonic signals are determined. The statistical values include a mean, a maximum value, and a minimum value. The stability coefficient of each detection position point is determined according to the statistical values, and the stability of the ultrasonic signal is graded according to the mean value of the stability coefficients of all detection position points. This method can solve the problem of difficult dynamic quantitative evaluation of ultrasonic 3D scanning imaging detection signals of composite parts in real scenarios, and improve the accuracy of ultrasonic 3D scanning detection.

[0038] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 Schematic diagram of the ultrasonic 3D scanning detection signal stability testing device provided in this application.

[0041] Reference numerals: 1. Receiving transducer; 2. Transmitting transducer; 3. Ultrasonic unit; 4. Imaging unit; 5. Scanning unit; 6. Water coupling unit; 7. Composite blade to be inspected. DETAILED DESCRIPTION

[0042] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0043] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0044] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0045] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present application include a particular feature, structure, or characteristic described in conjunction with that embodiment. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized. "Multiple" means "two or more."

[0046] The purpose of this application is to propose a method and device for testing the stability of ultrasonic 3D scanning detection signals in response to the requirements and current deficiencies of detection signal stability in ultrasonic 3D scanning detection of composite blades, and to provide a quantitative test and evaluation method and a grading model for detection signal stability to improve the ultrasonic 3D scanning detection effect of composite blades, so as to improve the accuracy of ultrasonic 3D scanning detection of composite blades and the reliability of detection results, reduce the risk of missed detection and misjudgment, and improve the comprehensive optimization efficiency of the ultrasonic 3D scanning detection system.

[0047] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0048] An embodiment of the present application provides a method for testing the stability of an ultrasonic 3D scanning detection signal, which specifically includes the following steps: fixing a composite material blade to be inspected between a receiving transducer and a transmitting transducer for ultrasonic 3D scanning; moving the receiving transducer and the transmitting transducer to a set detection position point according to a set ultrasonic 3D scanning trajectory; acquiring multiple ultrasonic signals at each detection position point according to a set time difference, and determining statistical values of the multiple ultrasonic signals, wherein the statistical values include a mean, a maximum value, and a minimum value; determining a stability coefficient for each detection position point based on the statistical values, and grading the stability of the ultrasonic signal according to the mean of the stability coefficients of all detection position points.

[0049] In the ultrasonic 3D scanning process of composite parts, homogeneous material plates, such as organic glass plates, are currently partially used to evaluate the stability of ultrasonic signals. The main shortcomings are: 1) The shape and position characteristics of the homogeneous material plates are completely different from those of the actual composite parts being tested, and the results obtained are difficult to represent the characteristics and stability of the ultrasonic 3D scanning detection signals of the actual composite parts; 2) The relative position of the homogeneous material plate and the ultrasonic 3D scanning probe part is fixed, which makes it difficult to reflect the actual scene of the actual composite parts during the ultrasonic 3D scanning process and the impact of the shape and position deviation between the probe and the composite parts being tested; 3) The water distance between the homogeneous material plate and the probe is fixed, which makes it difficult to reflect the impact of the detection signal caused by the water coupling changes and deviations during the ultrasonic 3D scanning process of the actual composite parts; 4) There is a lack of detection signal stability evaluation methods and quantitative grading models based on the real detection environment and detection parts of the ultrasonic 3D scanning equipment, which is not conducive to improving the ultrasonic 3D scanning detection effect of composite parts.

[0050] In response to these shortcomings, the present application combines the real environment of complex composite blades and ultrasonic 3D scanning detection equipment, and proposes a method for testing the stability of ultrasonic 3D scanning detection signals of geometrically complex composite blades, which are more susceptible to comprehensive interference such as electromagnetic interference, water coupling, and shape and position deviation. Based on the evaluation principle of multiple factors fusion, a method for testing the stability of ultrasonic 3D scanning detection signals is proposed, which solves the problem of difficult dynamic quantitative evaluation of ultrasonic 3D scanning imaging detection signals of composite parts in real scenarios, thereby providing a quantitative detection and evaluation method and a grading model for improving the ultrasonic 3D scanning detection effect of composite blades, and significantly improving the accuracy and actual detection effect of ultrasonic 3D scanning detection.

[0051] In some embodiments, before moving the receiving transducer and the transmitting transducer to the set detection position point according to the set ultrasonic 3D scanning trajectory, the method further includes: generating the ultrasonic 3D scanning trajectory using the scanning unit and , Two adjacent ultrasonic 3D scanning tracks and Step; determine the number of detection position points , .

[0052] In some embodiments, before acquiring multiple ultrasonic signals of each detection position point according to the set time difference, the method further includes: Determine the ultrasonic signal of the receiving transducer and transmits the ultrasonic signal of the transducer , .

[0053] In some embodiments, the time difference , Indicates the distance between two adjacent detection points. is the ultrasonic 3D scanning speed of the transmitting transducer and the receiving transducer, is the acquisition coefficient.

[0054] In some embodiments, determining the statistical values of the plurality of ultrasonic signals includes: finding the value of each detection position point Corresponding Ultrasonic signal and or The mean , minimum value , maximum value .

[0055] In some embodiments, determining the stability coefficient of each detection position point according to the statistical value includes: finding Ultrasonic signal and or Chinese Satisfaction Number of , According to the formula Calculate each detection position point Ultrasonic signal and or The stability coefficient .

[0056] In some embodiments, the step of grading the stability of the ultrasonic signal according to the mean value of the stability coefficient of all detection positions includes: if the mean value of the stability coefficient is If the stability coefficient is greater than or equal to the first set value, it is rated as Class A, indicating that the ultrasonic signal is very stable; if the stability coefficient average If the stability coefficient is greater than or equal to the second set value and less than the first set value, it is rated as Class B, indicating that the ultrasonic signal is stable; if the stability coefficient average If the stability coefficient is greater than or equal to the third set value and less than the second set value, it is rated as Class C, indicating that the ultrasonic signal is relatively stable; if the stability coefficient average If the stability coefficient is greater than or equal to the fourth set value and less than the third set value, it is rated as Class D, indicating that the ultrasonic signal is basically stable; if the stability coefficient average If it is less than the fourth set value, it is evaluated as Class E, indicating that the ultrasonic signal is unstable.

[0057] The present application also provides an ultrasonic 3D scanning detection signal stability test device for implementing the ultrasonic 3D scanning detection signal stability test method described above; the ultrasonic 3D scanning detection signal stability test device includes a receiving transducer, a transmitting transducer and a scanning unit; the receiving transducer is used to receive the transmission signal from the composite material blade being tested. The transmitting transducer is used to transmit ultrasonic signals to the composite blade being tested. , and is used to receive ultrasonic reflection signals from the composite blade being tested The scanning unit is used to generate an ultrasonic 3D scanning trajectory of the composite blade being tested , driving the receiving transducer and the transmitting transducer to perform ultrasonic 3D scanning on the composite material blade being inspected according to the generated scanning trajectory.

[0058] In some embodiments, the system further comprises an ultrasound unit, an imaging unit and a water coupling unit; the ultrasound unit is used to provide a receiving signal and a receiving transducer Preprocessing and digital conversion, providing the transmitting transducer with the transmitting signal and Preprocessing and digital transformation; the imaging unit is used to construct the detection position point and ultrasonic reflection signal and ultrasound transmission signal The mapping relationship between them is generated, and the ultrasonic reflection detection signal point cloud is generated. and ultrasonic transmission detection signal point cloud , and based on and The ultrasonic detection results are recorded and displayed in an image; the water coupling unit is used to provide water spray coupling for the receiving transducer and the transmitting transducer.

[0059] In some embodiments, the scanning unit is further configured to provide the imaging unit with position signals of the receiving transducer and the transmitting transducer.

[0060] The hardware structure used to implement the ultrasonic 3D scanning detection signal stability test method is as follows: Figure 1 As shown, it mainly consists of a receiving transducer 1, a transmitting transducer 2, an ultrasonic unit 3, an imaging unit 4, a scanning unit 5, a water coupling unit 6, etc. The composite blade 7 to be inspected is fixed on a special inspection tool. The water coupling unit 6 provides water spray coupling to the receiving transducer 1 and the transmitting transducer 2 through the water channel 1A and the water channel 2A respectively; the receiving transducer 1 is used to receive the transmission signal from the composite blade 7 to be inspected , upper right corner mark Indicates ultrasonic transmission, the transmitting transducer 2 is used to transmit ultrasonic signals to the composite blade 7 being tested , and is used to receive ultrasonic reflection signals from the composite blade 7 being tested , Indicates the location of the transmitting transducer 2 Detection location points , upper right corner mark Indicates ultrasonic reflection; the ultrasonic unit 3 is used to provide the receiving transducer 1 with a receiving signal and Preprocessing and digital conversion, providing transmission signal and Preprocessing and digital transformation.

[0061] The scanning unit 5 is composed of a dual six-axis scanning mechanism. Under the action of its control unit, it is used to drive the receiving transducer 1 and the transmitting transducer 2 to perform ultrasonic 3D scanning on the composite material blade 7 to be inspected according to a given scanning trajectory. The scanning unit 5 is also used to generate an ultrasonic 3D scanning trajectory of the composite material blade 7 to be inspected. , realizes ultrasonic 3D scanning of the receiving transducer 1 and the transmitting transducer 2, and provides the position signals of the receiving transducer 1 and the transmitting transducer 2 to the imaging unit 4; the imaging unit 4 is used to construct the detection position point and ultrasonic reflection signal and ultrasound transmission signal The mapping relationship between them is generated, and the ultrasonic reflection detection signal point cloud is generated. and ultrasonic transmission detection signal point cloud , and based on and Record and display ultrasonic test results. Figure 1 The hardware can also use water immersion coupling, and the ultrasonic reflection mode, transmission mode and multi-mode ultrasonic 3D scanning detection method can be selected according to the actual detection requirements.

[0062] The ultrasonic 3D scanning detection signal stability test and evaluation method and steps are as follows:

[0063] 1) Detection point position signal selection method

[0064] Based on the ultrasonic 3D scanning trajectory generated by the scanning unit 5 and , Two adjacent ultrasonic 3D scanning tracks and Step by step, move the receiving transducer 1 and the transmitting transducer 2 to the Detection location points ,here, , The number of detection position points, Detection location points The coordinates of Detection location points The posture coordinates of . According to the geometric characteristics of the composite blade 7 to be tested, it is determined according to formula (1): :

[0065] (1)

[0066] Here, the rate coefficient , determined through testing based on the geometrical characteristics and ply characteristics of the composite material blade 7 being tested.

[0067] 2) Set ultrasound parameters

[0068] Through the ultrasonic unit 3, the ultrasonic parameters are set according to formula (2) so that the ultrasonic signal from the receiving transducer 1 and transmits the ultrasonic signal of transducer 2 Satisfy the requirements of formula (2):

[0069] (2)

[0070] here, It is the reference value for ultrasound display and is determined according to the test requirements.

[0071] 3) Obtaining ultrasonic assessment signals

[0072] use Figure 1 The equipment shown has the function of ultrasonic 3D scanning and detecting composite material parts, according to the determined ultrasonic 3D scanning trajectory and , move the receiving transducer 1 and the transmitting transducer 2 to the corresponding detection positions in turn , according to formula (3) Get each detection location point Corresponding Ultrasonic signal and or , in which the reflection method ultrasonic 3D scanning detection is used to obtain , when conducting 3D ultrasonic scanning test using transmission method, obtain , when multi-mode ultrasonic 3D scanning detection, simultaneously obtain and .

[0073] (3)

[0074] here, Indicates the distance between two adjacent detection points. is the ultrasonic 3D scanning speed of the transmitting transducer 2 and / or the receiving transducer 1, is the acquisition coefficient.

[0075] 4) Find each detection position point Corresponding Ultrasonic signal and or The mean , minimum value , maximum value .

[0076] According to formula (4), for each detection position point Corresponding Ultrasonic signal and or Calculate and find Ultrasonic signal and or The number of items that satisfy formula (4) .

[0077] (4)

[0078] Current signal fluctuation bandwidth Or take , is the threshold signal fluctuation bandwidth, which is determined according to the detection requirements.

[0079] According to formula (5), calculate each detection position point Ultrasonic signal and or The stability coefficient .

[0080] (5)

[0081] A total of Stability coefficient: ,right Find the mean , minimum value , maximum value .

[0082] 5) Ultrasonic signal stability determination and classification method

[0083] , rated as Grade A, indicating that the ultrasound signal is very stable;

[0084] , rated as Grade B, indicating that the ultrasound signal is stable;

[0085] , rated as grade C, indicating that the ultrasound signal is relatively stable;

[0086] , rated as D, indicating that the ultrasound signal is basically stable;

[0087] , rated as E, indicating that the ultrasound signal is unstable.

[0088] When the ultrasonic signal stability is evaluated as Class D and Class E, it is necessary to comprehensively optimize the ultrasonic 3D scanning detection environment, including electromagnetic interference, water coupling, shape and position deviation, ultrasonic electronic unit, and equipment wiring rationality.

[0089] This application addresses the problem that ultrasonic 3D scanning detection signals of composite parts are affected by comprehensive interference such as electromagnetic interference, water coupling, and form and position deviation, and there is a lack of effective testing and evaluation methods and grading models for quantitatively evaluating the stability of detection signals. Based on the evaluation principle of multiple factors fusion considerations, a method for testing the stability of ultrasonic 3D scanning detection signals is proposed. This solves the problem that the stability of ultrasonic 3D scanning imaging detection signals of composite parts is difficult to dynamically quantify and evaluate, thereby providing a testing and quantitative evaluation method and a grading model for the stability of ultrasonic signals, and an evaluation method for improving the ultrasonic 3D scanning detection effect of composite parts. This is very helpful to improve the accuracy of ultrasonic 3D scanning detection results and defect detection capabilities, and guide the comprehensive design of ultrasonic 3D detection equipment for composite parts and the comprehensive optimization of electromagnetic interference, water coupling, form and position deviation, etc.

[0090] It should be noted that the information interaction, execution process, etc. between the above-mentioned modules / units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment section and will not be repeated here.

[0091] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0092] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for testing the stability of ultrasonic 3D scanning detection signals, characterized in that: include: The composite blade to be inspected is fixed between the receiving transducer and the transmitting transducer for ultrasonic 3D scanning; Move the receiving transducer and transmitting transducer to the set detection position according to the set ultrasonic 3D scanning trajectory; Acquire multiple ultrasonic signals at each detection position point according to the set time difference, and determine statistical values of the multiple ultrasonic signals, wherein the statistical values include a mean value, a maximum value, and a minimum value; Determining the stability coefficient of each detection position point according to the statistical value, and grading the stability of the ultrasonic signal according to the mean value of the stability coefficients of all detection position points; The determining of the statistical values of the plurality of ultrasound signals comprises: Find each detection position point Corresponding Ultrasonic signal and or The mean , minimum value , maximum value ; Determining the stability coefficient of each detection position point according to the statistical value includes: Find Ultrasonic signal and or Chinese Satisfaction Number of , ; According to the formula Calculate each detection position point Ultrasonic signal and or The stability coefficient .

2. The ultrasonic 3D scanning detection signal stability testing method according to claim 1, characterized in that: Before the receiving transducer and the transmitting transducer are moved to the set detection position point according to the set ultrasonic 3D scanning trajectory, the method further includes: Generate ultrasonic 3D scanning trajectory using scanning unit and , Two adjacent ultrasonic 3D scanning tracks and Stepping; Determine the number of detection points , .

3. The ultrasonic 3D scanning detection signal stability testing method according to claim 2, characterized in that: Before acquiring multiple ultrasonic signals of each detection position point according to the set time difference, the method further includes: According to the set ultrasound display reference value Determine the ultrasonic signal of the receiving transducer and transmits the ultrasonic signal of the transducer , .

4. The ultrasonic 3D scanning detection signal stability testing method according to claim 3, characterized in that: The time difference , Indicates the distance between two adjacent detection points. is the ultrasonic 3D scanning speed of the transmitting transducer and the receiving transducer, is the acquisition coefficient.

5. The ultrasonic 3D scanning detection signal stability testing method according to claim 4, characterized in that: The grading of the ultrasonic signal stability according to the mean value of the stability coefficient of all detection positions includes: If the mean stability coefficient If it is greater than or equal to the first set value, it is rated as Class A, indicating that the ultrasonic signal is very stable; If the mean stability coefficient If it is greater than or equal to the second set value and less than the first set value, it is evaluated as Class B, indicating that the ultrasonic signal is stable; If the mean stability coefficient If it is greater than or equal to the third set value and less than the second set value, it is evaluated as Class C, indicating that the ultrasonic signal is relatively stable; If the mean stability coefficient If it is greater than or equal to the fourth set value and less than the third set value, it is evaluated as Class D, indicating that the ultrasonic signal is basically stable; If the mean stability coefficient If it is less than the fourth set value, it is evaluated as Class E, indicating that the ultrasonic signal is unstable.

6. An ultrasonic 3D scanning detection signal stability test device, characterized in that: Used to implement the ultrasonic 3D scanning detection signal stability test method according to any one of claims 1 to 5; the ultrasonic 3D scanning detection signal stability test device includes a receiving transducer, a transmitting transducer and a scanning unit; The receiving transducer is used to receive the transmission signal from the composite material blade being tested The transmitting transducer is used to transmit ultrasonic signals to the composite blade being tested. , and is used to receive ultrasonic reflection signals from the composite blade being tested ; The scanning unit is used to generate an ultrasonic 3D scanning trajectory of the composite blade being inspected , driving the receiving transducer and the transmitting transducer to perform ultrasonic 3D scanning on the composite material blade being inspected according to the generated scanning trajectory.

7. The ultrasonic 3D scanning detection signal stability testing device according to claim 6, characterized in that: Also included are an ultrasound unit, an imaging unit, and a water coupling unit; The ultrasonic unit is used to provide a receiving signal to the receiving transducer and Preprocessing and digital conversion, providing the transmitting transducer with the transmitting signal and Preprocessing and digital transformation; The imaging unit is used to construct a detection position point and ultrasonic reflection signal and ultrasound transmission signal The mapping relationship between them is generated, and the ultrasonic reflection detection signal point cloud is generated. and ultrasonic transmission detection signal point cloud , and based on and Record and display ultrasonic test results; The water coupling unit is used to provide water spray coupling for the receiving transducer and the transmitting transducer.

8. The ultrasonic 3D scanning detection signal stability testing device according to claim 7, characterized in that: The scanning unit is further configured to provide the imaging unit with position signals of the receiving transducer and the transmitting transducer.

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