CN115932055A - Flexible ultrasonic array detection system for non-open inner cavity of composite material structure - Google Patents
Flexible ultrasonic array detection system for non-open inner cavity of composite material structure Download PDFInfo
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- CN115932055A CN115932055A CN202310021844.3A CN202310021844A CN115932055A CN 115932055 A CN115932055 A CN 115932055A CN 202310021844 A CN202310021844 A CN 202310021844A CN 115932055 A CN115932055 A CN 115932055A
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Abstract
The invention relates to the technical field of nondestructive testing, in particular to a flexible ultrasonic array detection system for a non-open inner cavity of a composite material structure. The flexible ultrasonic array transducer is pulled by the flexible ultrasonic scanner, so that the flexible ultrasonic array transducer is moved and scanned along the linear direction, and then signals of an array wafer of the flexible ultrasonic array transducer are transmitted to the ultrasonic array unit for processing. The ultrasonic automatic scanning detection of the composite material non-open inner cavity with different lengths is realized, the ultrasonic quick automatic scanning detection of the composite material structure non-open inner cavity inner reinforcing ribs can be completed through one-time scanning, the detection automation degree is high, the detection efficiency is high, the detection result can be recorded and visualized, the defect location is easy to detect, the detection result is influenced little by the technical state and the subjective factors of a detector, and the detectability and the detection efficiency of the composite material structure non-open inner cavity inner reinforcing ribs and the reliability of detection are obviously improved.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to a flexible ultrasonic array detection system for a non-open inner cavity of a composite material structure.
Background
The composite material structure non-open inner cavity is a very important structural form, and the quality requirement on the composite material structure non-open inner cavity is very high. In order to ensure the quality of the non-open cavity, 100% non-destructive testing of the composite structure non-open cavity is required. Because the composite material structure non-open inner cavity has narrow space and long-size geometric characteristics, the existing composite material structure non-open inner cavity structure detection mainly adopts an ultrasonic reflection method, and in order to realize detection of the composite material structure non-open inner cavity coverage, ultrasonic scanning needs to be carried out on inaccessible positions in the composite material structure non-open inner cavity.
Referring to fig. 1, the current ultrasonic testing method includes: the ultrasonic transducer 2 is stretched into the non-open inner cavity 1 of the composite material structure in a manual scanning mode through the scanning rod, the ultrasonic transducer 2 is stretched into the non-open inner cavity from the open end of the composite material structure, the ultrasonic transducer 2 is driven by the scanning rod, ultrasonic manual scanning detection on the reinforcing ribs is achieved, and scanning detection on the reinforcing ribs of the non-open inner cavity of the composite material structure is achieved. It has the main disadvantages that: (1) The ultrasonic transducer 2 usually adopts a single crystal probe, so that the detection efficiency is low and the labor intensity is high; (2) Coverage scanning of the reinforcing ribs of the non-open inner cavity 1 of the composite material structure is difficult to accurately realize, so that detection omission is easily caused; (3) The ultrasonic detection has low automation degree, the detection result is greatly influenced by the technical state and subjective factors of a detector, and the detection is easy to miss; (4) The detection result cannot be recorded and visualized, so that the reliability of the detection result is influenced; and (5) the defect is difficult to locate.
As an improvement, ultrasonic automatic scanning detection is adopted. The current more conventional ultrasonic detection method is as follows: through the design of a special scanning mechanism, the ultrasonic transducer 2 extends into the composite material structure from the open end of the non-open inner cavity 1 to scan the reinforcing ribs. The main defects are as follows:
(1) When the non-open inner cavity 1 of the composite material structure exceeds more than 1m and even reaches 20m, the mechanical rigidity and strength of the scanning mechanism are difficult to ensure that the transducer can accurately and automatically scan and detect the reinforcing ribs in the non-open inner cavity 1 of the composite material structure and detect the defect positioning requirement by ultrasonic, so that the detection effect and the reliability of the detection result are influenced, and the reliable detection of the non-open inner cavity 1 of the composite material structure is difficult to realize; and (2) the detection efficiency is low.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides a flexible ultrasonic array detection system for a non-open inner cavity of a composite material structure, which solves the technical problems of low detectability, detection efficiency and detection reliability of reinforcing ribs in the non-open inner cavity of the composite material structure.
(2) Technical scheme
An embodiment of the present invention provides a flexible ultrasonic array detection system for a non-open inner cavity of a composite material structure, including: the system comprises a flexible ultrasonic array transducer, a flexible ultrasonic scanner and an ultrasonic array unit; the bottom of the flexible ultrasonic array transducer is provided with an array wafer for being arranged in a non-open inner cavity of the composite material structure to scan the detected reinforcing ribs; the flexible ultrasonic scanner comprises two groups of flexible ultrasonic scanners which are respectively arranged at two ends of the non-open inner cavity of the composite material structure, and the flexible ultrasonic scanners are respectively connected with the front flexible connecting end and the rear flexible connecting end of the flexible ultrasonic array transducer through flexible connecting wires and used for drawing the flexible ultrasonic array transducer so as to enable the flexible ultrasonic array transducer to move along the linear direction for scanning; the ultrasonic array unit is arranged outside the non-open inner cavity of the composite material structure and is connected with the array wafer through an ultrasonic signal connecting end arranged on the flexible ultrasonic array transducer so as to process signals of the array wafer.
Furthermore, the flexible ultrasonic array transducer further comprises a flexible rod and a guide wheel, one end of the flexible rod is connected with the top of the flexible ultrasonic array transducer, and the other end of the flexible rod is connected with the guide wheel.
Furthermore, the flexible rod comprises a left flexible rod and a right flexible rod, the left flexible rod and the right flexible rod are symmetrically arranged at the top of the flexible ultrasonic array transducer respectively and are connected with a left guide wheel and a right guide wheel respectively.
Further, the external dimension of the flexible ultrasonic array transducer meets the design formula: m = H ± K 1 ；N＝W±K 2 (ii) a Wherein M is the height of the flexible ultrasonic array transducer, N is the width of the flexible ultrasonic array transducer, H is the height of the reinforcing rib of the detected composite material structure in the non-open inner cavity, and W is the width of the reinforcing rib of the detected composite material structure in the non-open inner cavity; k is 1 Is a vertical mechanical coefficient, K 2 Horizontal mechanical coefficients.
Further, flexible ultrasonic scanner includes motor, flexible seat and support, the motor is installed on the top of flexible seat, just the pivot of motor is connected with the rolling axle down, four angles of the lower extreme of flexible seat are provided with respectively the support, the height-adjustable of support, one side of flexible seat is equipped with the outlet, the one end of flexible connecting wire is fixed on the rolling axle, and the other end passes through the outlet with the preceding flexible connection end of flexible ultrasonic array transducer is connected, the length of flexible connecting wire and the length phase-match of the non-uncovered inner chamber of combined material structure.
Further, the motor includes an encoder for detecting a rotation angle of the motor and a rotation controller for controlling the rotation angle of the motor.
Further, the ultrasonic array unit comprises an ultrasonic array instrument host, a motor control connecting seat, an encoder connecting seat and an ultrasonic array signal connecting seat, wherein the motor control connecting seat, the encoder connecting seat and the ultrasonic array signal connecting seat are respectively arranged on the ultrasonic array instrument host, the motor control connecting seat is electrically connected with the rotary controller, the encoder connecting seat is electrically connected with the encoder, and the ultrasonic array signal connecting seat is electrically connected with the ultrasonic signal connecting end.
Furthermore, four corners of the lower end of the ultrasonic array instrument host are respectively provided with an instrument support, and the height of the instrument support is adjustable.
And the power supply is composed of a rechargeable battery pack and provides working power supply for the flexible ultrasonic array transducer, the flexible ultrasonic scanner and the ultrasonic array unit.
Further, the ultrasonic automatic scanning detection device also comprises a supporting seat, wherein the non-open inner cavity of the composite material structure is placed on two or more supporting seats, so that the ultrasonic automatic scanning detection is convenient to carry out.
(3) Advantageous effects
In summary, the flexible ultrasonic array transducer is pulled by the flexible ultrasonic scanner, so that the flexible ultrasonic array transducer is moved along a linear direction for scanning, and then signals of an array wafer of the flexible ultrasonic array transducer are transmitted to the ultrasonic array unit for processing. The ultrasonic automatic scanning detection of the composite material non-open inner cavities with different lengths is realized, the ultrasonic quick automatic scanning detection of the reinforcing ribs in the composite material structure non-open inner cavities can be completed by one-time scanning, the detection automation degree is high, the detection efficiency is high, the detection is not easy to miss, the labor intensity is low, and the environment is protected; the detection result can be recorded and visualized, the defect can be easily detected and positioned, the detection result is slightly influenced by the technical state and subjective factors of a detector, and the detectability and the detection efficiency of the reinforcing ribs in the non-open inner cavity of the composite material structure and the detection reliability are obviously improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a composite structure with no open cavity.
FIG. 2 is a schematic diagram of a connection relationship of a flexible ultrasonic array inspection system for a composite structure with an open lumen.
FIG. 3 is a schematic diagram of a flexible ultrasonic array transducer for a composite structure non-open lumen flexible ultrasonic array inspection system.
FIG. 4 is a schematic diagram of a flexible ultrasonic array transducer and a flexible ultrasonic scanner for a flexible ultrasonic array inspection system for a non-open lumen composite structure.
In the figure: 1. the composite structure is not an open cavity; 2. an ultrasonic transducer; 3. a flexible ultrasonic array transducer; 4. a flexible ultrasound scanner; 5. an ultrasound array unit; 30. a left flexible rod; 31. a right flexible rod; 32. a left guide wheel; 33. a right guide wheel; 40. a motor; 41. a flexible seat; 42. a support; 43. a winding shaft; 44. a flexible connecting line; 45. an encoder; 46. a rotation controller; 50. an instrument support; 6. a power source; 7. and (4) supporting the base.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations and improvements in the parts, components and connection means, without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2 to 4, an embodiment of the present invention provides a flexible ultrasonic array inspection system for a composite structure with an open cavity, including: a flexible ultrasonic array transducer 3, a flexible ultrasonic scanner 4 and an ultrasonic array unit 5;
the bottom of the flexible ultrasonic array transducer 3 is provided with an array wafer for being arranged in the non-open inner cavity 1 of the composite material structure to scan the detected reinforcing ribs. The array wafer comprises n piezoelectric wafers, and the calculation formula of n is as follows:
w is the width of the piezoelectric wafer, L is the length of the side edge of the reinforcing rib of the composite material structure non-open inner cavity 1, and delta w is the distance between two adjacent piezoelectric wafers. The array wafer is composed of n piezoelectric wafers and covers the whole cross section of the reinforcing rib of the non-open inner cavity 1 of the detected composite material structure, so that the ultrasonic scanning of the cross section of the whole reinforcing rib can be realized without scanning the cross section of the reinforcing rib by a probe. The length of the piezoelectric wafer is 8-20 mm, and the width of the piezoelectric wafer is 0.8-3 mm. The thickness of the piezoelectric wafer is determined according to the required frequency, the frequency is determined according to the thickness and the material characteristics of the non-open cavity 1 of the detected composite material structure and the detected defect requirement, and the frequency is selected between 5MHz and 10MHz generally.
The flexible ultrasonic scanner 4 comprises two groups which are respectively arranged at two ends of the composite material structure non-open inner cavity 1, and is respectively connected with the front flexible connecting end and the rear flexible connecting end of the flexible ultrasonic array transducer 3 through flexible connecting lines 44, the flexible ultrasonic array transducer 3 is pulled, the flexible ultrasonic array transducer 3 is selected through the flexible ultrasonic scanner 4 to be scanned and detected along one end of the composite material structure non-open inner cavity 1, and the flexible ultrasonic array transducer 3 is also selected through the flexible ultrasonic scanner 4 to be scanned and detected along the other end of the composite material structure non-open inner cavity 1, so that the flexible ultrasonic array transducer 3 moves, is scanned and scanned along the linear direction.
The ultrasonic array unit 5 is arranged outside the non-open inner cavity 1 of the composite material structure and is connected with the array wafer through an ultrasonic signal connecting end arranged on the flexible ultrasonic array transducer 3 so as to process signals of the array wafer. The flexible ultrasonic array transducer 3 is dragged by the flexible ultrasonic scanner 4, so that the flexible ultrasonic array transducer 3 moves along a linear direction for scanning, and then signals of an array wafer of the flexible ultrasonic array transducer 3 are transmitted to the ultrasonic array unit 5 for processing. The ultrasonic automatic scanning detection of the composite material non-open inner cavities with different lengths is realized, the ultrasonic rapid automatic scanning detection of the reinforcing ribs in the composite material structure non-open inner cavity 1 can be completed by one-time scanning, the detection automation degree is high, the detection efficiency is high, the omission is not easy to occur, the labor intensity is low, and the environment is protected; the detection result can be recorded and visualized, the defect is easy to detect and position, the detection result is influenced little by the technical state and subjective factors of a detector, and the detectability and the detection efficiency of the reinforcing ribs in the non-open inner cavity 1 of the composite material structure and the reliability of detection are obviously improved.
In some embodiments, the flexible ultrasonic array transducer 3 further comprises a flexible rod and a guide wheel, one end of the flexible rod is connected with the top of the flexible ultrasonic array transducer 3, and the other end of the flexible rod is connected with the guide wheel. In order to enable the array wafer to be in better contact with the surface of the detected reinforcing rib, the flexible rod is used for realizing self-adaptive adjustment in the vertical direction, namely the array wafer is in contact with the bottom of the non-open inner cavity 1 of the composite material structure, the guide wheel at the other end of the flexible rod is in contact with the top of the non-open inner cavity 1 of the composite material structure, and tensioning is achieved to a certain degree, so that the array wafer is always in contact with the surface of the detected reinforcing rib in the scanning process, and a stable ultrasonic wave transmitting and receiving state is formed.
Further, the flexible rod includes left flexible rod 30 and right flexible rod 31, the flexible rod can be the telescopic link of installing the spring, left side flexible rod 30 and right flexible rod 31 symmetry respectively set up the top of flexible supersound array transducer 3 to connect left side leading wheel 32 and right side leading wheel 33 respectively, make in the removal process both sides atress more balanced, the leading wheel can reduce the kinetic friction force that the contact produced simultaneously, thereby makes things convenient for the removal of flexible supersound array transducer 3.
In some embodiments, the dimensions of the flexible ultrasound array transducer 3 satisfy the design formula: m = H ± K 1 ；N＝W±K 2 (ii) a Wherein M is the height of the flexible ultrasonic array transducer 3, and N is the height of the flexible ultrasonic array transducer 3The width H is the height of the reinforcing rib of the detected composite material structure non-open inner cavity 1, and W is the width of the reinforcing rib of the detected composite material structure non-open inner cavity; k is 1 Is a vertical mechanical coefficient, K 2 Horizontal mechanical coefficients. The size is ensured to be proper, the flexible ultrasonic array transducer 3 can be conveniently placed in the non-open inner cavity 1 of the composite material structure, and meanwhile, good stability can be ensured.
In some embodiments, the flexible ultrasound scanner 4 includes a motor 40, a flexible seat 41 and a support 42, the motor 40 is installed at the top end of the flexible seat 41, a winding shaft 43 is connected to the motor 40 with its rotating shaft facing downward, the support 42 is respectively disposed at four corners of the lower end of the flexible seat 41, the height of the support 42 is adjustable, one side of the flexible seat 41 is equipped with an outlet, one end of the flexible connecting wire 44 is fixed on the winding shaft 43, the other end of the flexible connecting wire is connected to the front flexible connecting end of the flexible ultrasound array transducer 3 through the outlet, and the length of the flexible connecting wire 44 matches the length of the non-open cavity 1 of the composite material structure. The motor 40 rotates to drive the winding shaft 43 to wind the flexible connecting line 44 so as to draw the flexible ultrasonic array transducer 3 to approach the flexible ultrasonic scanner 4, thereby realizing the mobile scanning of the flexible ultrasonic array transducer 3.
In some embodiments, the motor 40 includes an encoder 45 and a rotation controller 46, the encoder 45 is used for detecting the rotation angle of the motor 40, the rotation controller 46 is used for controlling the rotation angle of the motor 40, and the combination of the encoder 45 and the rotation controller 46 realizes the closed-loop control of the motor 40, so as to accurately move the distance of the flexible ultrasonic array transducer 3.
In some embodiments, the ultrasonic array unit 5 includes an ultrasonic array instrument host, a motor 40 control connecting seat, an encoder 45 connecting seat, and an ultrasonic array signal connecting seat, the motor 40 control connecting seat, the encoder 45 connecting seat, and the ultrasonic array signal connecting seat are respectively disposed on the ultrasonic array instrument host, the motor 40 control connecting seat is electrically connected to the rotation controller 46, the encoder 45 connecting seat is electrically connected to the encoder 45, and the ultrasonic array signal connecting seat is electrically connected to the ultrasonic signal connecting seat. The movement of the flexible ultrasonic array transducer 3 is controlled through the ultrasonic array instrument host, and the transmission/reception, detection and image display of ultrasonic array signals are carried out on the flexible ultrasonic array transducer 3.
In some embodiments, the four corners of the lower end of the ultrasonic array instrument main unit are respectively provided with an instrument support 50, and the height of the instrument support 50 is adjustable, so that the ultrasonic array instrument main unit can adapt to the requirements of various fields, and a stable operating environment is obtained.
In some embodiments, the ultrasonic diagnosis device further comprises a power supply 6, wherein the power supply 6 is formed by a rechargeable battery pack and provides an operating power supply 6 for the flexible ultrasonic array transducer 3, the flexible ultrasonic scanner 4 and the ultrasonic array unit 5, so that the ultrasonic diagnosis device can adapt to the requirements of various fields and has better flexibility.
In some embodiments, the ultrasonic automatic scanning detection device further comprises a supporting seat 7, the composite material structure non-open inner cavity 1 is placed on two or more supporting seats 7, and the supporting seat 7 can conveniently fix and level the composite material structure non-open inner cavity 1 so as to facilitate ultrasonic automatic scanning detection.
The embodiment is as follows:
the method comprises the steps of selecting flexible ultrasonic array transducers 3 with n =32, 64 and 128, wherein the length of each wafer is respectively three specifications of 8 mm, 10 mm and 20mm, the width delta w of each wafer is respectively three specifications of 0.8, 1 and 2, the frequency is selected to be two types of 5MHz and 7.5MHz, and a series of flexible ultrasonic array scanning detection tests are respectively completed on internal reinforcing ribs of a non-open cavity 1 with a composite material structure of 1m, 3m, 5m and 15m in length.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A flexible ultrasonic array inspection system for a non-open lumen of a composite structure, comprising: the system comprises a flexible ultrasonic array transducer, a flexible ultrasonic scanner and an ultrasonic array unit;
the bottom of the flexible ultrasonic array transducer is provided with an array wafer for being arranged in a non-open inner cavity of the composite material structure to scan the detected reinforcing ribs;
the flexible ultrasonic scanner comprises two groups of flexible ultrasonic scanners which are respectively arranged at two ends of the non-open inner cavity of the composite material structure, and the flexible ultrasonic scanners are respectively connected with the front flexible connecting end and the rear flexible connecting end of the flexible ultrasonic array transducer through flexible connecting wires and used for drawing the flexible ultrasonic array transducer so as to enable the flexible ultrasonic array transducer to move along the linear direction for scanning;
the ultrasonic array unit is arranged outside the non-open inner cavity of the composite material structure and is connected with the array wafer through an ultrasonic signal connecting end arranged on the flexible ultrasonic array transducer so as to process signals of the array wafer.
2. A flexible ultrasonic array inspection system for a non-open lumen of a composite structure according to claim 1 wherein the flexible ultrasonic array transducer further comprises a flexible rod and a guide wheel, one end of the flexible rod being connected to the top of the flexible ultrasonic array transducer and the other end of the flexible rod being connected to the guide wheel.
3. The system of claim 2, wherein the flexible rods comprise a left flexible rod and a right flexible rod, and the left flexible rod and the right flexible rod are symmetrically arranged on the top of the flexible ultrasonic array transducer and are respectively connected with a left guide wheel and a right guide wheel.
4. A flexible ultrasonic array inspection system for a non-open cavity of a composite structure according to claim 3 wherein the dimensions of the flexible ultrasonic array transducer satisfy the design formula:
M＝H±K 1
N＝W±K 2
wherein M is the height of the flexible ultrasonic array transducer, N is the width of the flexible ultrasonic array transducer, H is the height of the reinforcing rib of the detected composite material structure in the non-open inner cavity, and W is the width of the reinforcing rib of the detected composite material structure in the non-open inner cavity; k is 1 Is the vertical mechanical coefficient, K 2 Horizontal mechanical coefficients.
5. The system according to claim 1, wherein the flexible ultrasonic scanner comprises a motor, a flexible seat and a support, the motor is mounted at the top end of the flexible seat, a winding shaft is connected to the rotating shaft of the motor in a downward direction, the support is arranged at each of four corners of the lower end of the flexible seat, the height of the support is adjustable, a wire outlet is arranged at one side of the flexible seat, one end of the flexible connecting wire is fixed to the winding shaft, the other end of the flexible connecting wire is connected with the front flexible connecting end of the flexible ultrasonic array transducer through the wire outlet, and the length of the flexible connecting wire is matched with that of the non-open cavity of the composite structure.
6. A flexible ultrasonic array inspection system for a non-open cavity of a composite structure as claimed in claim 5 wherein the motor includes an encoder to detect the angle of rotation of the motor and a rotation controller to control the angle of rotation of the motor.
7. The system of claim 6, wherein the ultrasonic array unit comprises an ultrasonic array instrument host, a motor control connecting seat, an encoder connecting seat and an ultrasonic array signal connecting seat, the motor control connecting seat, the encoder connecting seat and the ultrasonic array signal connecting seat are respectively arranged on the ultrasonic array instrument host, the motor control connecting seat is electrically connected with the rotation controller, the encoder connecting seat is electrically connected with the encoder, and the ultrasonic array signal connecting seat is electrically connected with the ultrasonic signal connecting seat.
8. The system of claim 7, wherein instrument supports are respectively arranged at four corners of the lower end of the ultrasonic array instrument main frame, and the height of each instrument support is adjustable.
9. The system of claim 1, further comprising a power source comprising a rechargeable battery pack for providing operating power to the flexible ultrasound array transducer, the flexible ultrasound scanner, and the ultrasound array unit.
10. A flexible ultrasonic array inspection system for a non-open cavity of a composite structure according to any one of claims 1 to 9 further comprising a support base, wherein the non-open cavity of the composite structure is disposed on two or more of the support bases to facilitate automatic scanning and inspection by ultrasound.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310021844.3A CN115932055A (en) | 2023-01-07 | 2023-01-07 | Flexible ultrasonic array detection system for non-open inner cavity of composite material structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310021844.3A CN115932055A (en) | 2023-01-07 | 2023-01-07 | Flexible ultrasonic array detection system for non-open inner cavity of composite material structure |
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| CN202310021844.3A Pending CN115932055A (en) | 2023-01-07 | 2023-01-07 | Flexible ultrasonic array detection system for non-open inner cavity of composite material structure |
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