Acoustic emission sensor positioning tool

Abstract

The invention belongs to the field of machining assistance, and discloses a positioning tool for an acoustic emission sensor, which can enable the acoustic emission sensor to well cling and position a to-be-detected surface with a complex curved surface, greatly improve the stability of signal acquisition, and easily realize accurate signal acquisition. Comprising an acoustic emission sensor positioning tool, an adsorption assembly and a driving assembly, a movable fixing assembly comprises a fixing rod piece capable of rotating in a three-dimensional mode, the fixing rod piece fixes an acoustic sensor through a fixing part, and the adsorption assembly is coupled with the movable fixing assembly through a coupling side and adsorbed to a to-be-detected surface through a suction cup on the adsorption side. The driving assembly is used for driving the movable fixing assembly to move towards or away from a to-be-detected surface, the to-be-detected surface is provided with an adsorption area and a positioning area which are relatively independent, the suction cup is adsorbed in the adsorption area, the fixing part faces the positioning area, and the driving assembly drives the movable fixing assembly to move to drive the fixing rod piece to enable the acoustic sensor to be tightly attached to the positioning area to be positioned.

Description

Technical Field

[0001] This invention belongs to the field of machining assistance, and specifically relates to a positioning fixture for an acoustic emission sensor. Background Technology

[0002] Acoustic emission refers to the physical phenomenon in which a material or structure releases energy to generate elastic waves when subjected to external forces, changes in internal stress, or environmental influences. For an acoustic emission sensor to acquire acoustic emission signals, the surface of the material being measured must be in close contact with the sensor. This is crucial for obtaining clear and complete acoustic emission signals; in other words, the measurement accuracy of an acoustic emission sensor is closely related to its stable positioning on the surface being measured.

[0003] Currently, the mainstream connection methods for acoustic emission sensors are: 1. The acoustic emission sensor is positioned on the surface to be measured by binding it with tape; 2. It is positioned on the surface to be measured by adhesive; 3. It is positioned on the surface to be measured by adsorption after embedding a magnet at the bottom.

[0004] However, the binding method is only effective for flat or narrow test surfaces with small curvature. If these conditions are not met, the binding method is difficult to achieve stable positioning of the acoustic emission sensor. On the other hand, the adhesive or magnetic method requires a bonding reference surface or magnetic reference surface with good flatness. Therefore, the above methods are less stable for signal acquisition on complex curved surfaces and are difficult to achieve the expected acquisition accuracy. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a positioning fixture for an acoustic emission sensor, which enables the acoustic emission sensor to be well-fitted and positioned on the surface to be measured, which has a complex curved surface. This greatly improves the stability of the acquired signal and makes it easier to achieve accurate signal acquisition.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An acoustic emission sensor positioning fixture for positioning an acoustic emission sensor on a test surface includes: a movable fixing component including a three-dimensionally rotatable fixing rod, the fixing rod having a fixing part facing the test surface, the fixing rod fixing the acoustic sensor via the fixing part; an adsorption component having a coupling side and an adsorption side, the coupling side being coupled to the movable fixing component, the adsorption side being adsorbed onto the test surface via a suction cup; and a driving component coupled to the adsorption component for driving the movable fixing component to move toward or away from the test surface. The test surface has relatively independent adsorption areas and positioning areas, the suction cup adsorbs within the adsorption area, the fixing part faces the positioning area, and the driving component drives the movable fixing component to move, thereby causing the fixing rod to position the acoustic sensor against the positioning area.

[0007] Preferably, the present invention further includes a component carrier, and both the driving component and the movable fixing component are disposed on the component carrier, with the coupling side connected to the component carrier. The movable fixing component further includes a driving entity and a coupling entity. The fixing rod has a ball head opposite to the fixing part. The driving entity is disposed at the output end of the driving component. One end of the coupling entity is disposed on the driving entity, and the other end forms a ball seat part that is hinged to the ball head. Furthermore, the component carrier is a hollow box with a passage opening. The movable fixing component is located inside the component carrier, and the moving direction of the movable fixing component is taken as the clamping direction. The fixing rod, the passage opening, and the positioning area correspond along the clamping direction.

[0008] Furthermore, the drive assembly includes a drive motor, a drive screw, and a drive slider. The drive motor and the drive screw are output coupled. The drive screw is set on the inner wall of the assembly carrier and its extension direction is parallel to the contact direction. The drive slider is fitted on the drive screw, and the drive entity is coupled with the drive slider.

[0009] Furthermore, the number of drive components is one pair, and the pair of drive screws are located on opposite side walls of the component carrier. The inner wall of the component carrier also forms a pair of opposite mating grooves that extend in the contact direction. The circumferential surface of the drive entity has four protrusions extending radially in a cross shape, the free ends of two of the protrusions are coupled to the drive slider, and the free ends of the other two protrusions are engaged with the mating grooves.

[0010] Furthermore, the component carrier includes an open carrier housing and a carrier cover plate that closes the carrier housing from the top, with the drive motor located on the upper surface of the carrier cover plate.

[0011] Furthermore, the carrier cover plate has a vertically extending through-hole, and the drive assembly also includes a coupling that passes through the through-hole. One end of the coupling is splined into the end of the drive screw, and the other end is fixedly sleeved on the output shaft of the drive motor by a connecting screw.

[0012] Furthermore, the drive assembly also includes a motor mounting base disposed on the carrier cover plate. The motor mounting base has a vertically extending and continuous motor positioning countersunk hole and a coupling channel from top to bottom. An assembly recess is formed on the side wall of the motor mounting base to open the coupling channel to the outside. The assembly recess serves as an operating space for the connecting screws. The drive motor is positioned inside the motor positioning countersunk hole, and the output shaft of the drive motor is coupled to the coupling within the coupling channel. Furthermore, the adsorption assembly includes a pair of scissor lift mechanisms, with two coupling rod ends on the coupling side and two fixed-distance rod ends on the adsorption side. The two fixed-distance rod ends are respectively provided with suction cups, and the pair of scissor lift mechanisms are adsorbed onto the surface to be tested through four suction cups.

[0013] Furthermore, the adsorption assembly also includes a pair of linear guides and two pairs of adjustable sliders corresponding to the scissor lift mechanism. The linear guides are fixed on the outer surface of the assembly carrier and located on opposite sides of the passage opening. The pair of adjustable sliders are fitted onto the linear guides. The ends of a pair of coupling rods of the scissor lift mechanism are respectively hinged onto the pair of adjustable sliders, and the pair of adjustable sliders can move towards or away from each other along the linear guides.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Because the acoustic emission sensor positioning fixture of the present invention includes an acoustic emission sensor positioning fixture, an adsorption component, and a driving component, the movable fixing component includes a three-dimensionally rotatable fixing rod, the fixing rod fixes the acoustic sensor through a fixing part, the adsorption component is coupled to the movable fixing component through a coupling side, and is adsorbed onto the surface to be measured by a suction cup on the adsorption side, the driving component is used to drive the movable fixing component to move toward or away from the surface to be measured, the surface to be measured has a relatively independent adsorption area and a positioning area, the suction cup is adsorbed in the adsorption area, the fixing part faces the positioning area, the driving component drives the movable fixing component to move, thereby driving the fixing rod to position the acoustic sensor close to the positioning area, therefore, under the premise of achieving overall positioning of the device through the suction cup, the present invention drives the acoustic emission sensor to move to the positioning area close to the surface to be measured by moving the fixing rod, thereby enabling the acoustic emission sensor to be well positioned close to the surface to be measured with complex curvature, greatly improving the stability of the acquired signal and making it easy to achieve accurate signal acquisition.

[0015] 2. Because the movable fixing component of the present invention also includes a driving entity and a coupling entity, the fixing rod has a ball head opposite to the fixing part, the driving entity is disposed at the output end of the driving component, one end of the coupling entity is disposed on the driving entity, and the other end forms a ball seat that is hinged to the ball head. That is, the three-dimensional rotation of the fixing rod is realized by the ball hinge connection between the fixing rod and the coupling entity, that is, the three-dimensional rotation of the acoustic emission sensor. In other words, when the acoustic emission sensor contacts the surface to be measured, under the continuous driving of the driving component, the acoustic emission sensor spontaneously makes adaptive posture adjustments to fit the curved surface of the surface to be measured, thereby better fitting the surface to be measured. Therefore, the present invention enables the acoustic emission sensor to adaptively and better fit the surface to be measured by setting the ball hinge.

[0016] 3. Because the inner wall of the component carrier of the present invention also forms a pair of opposing sliding grooves that both extend along the contact direction, and the peripheral surface of the driving entity has four protrusions extending radially in a cross shape, wherein the free ends of two of the protrusions are coupled to the driving slider, and the free ends of the other two protrusions are engaged with the sliding grooves, the present invention constrains the degrees of freedom of the movable fixed component in directions other than the contact direction by constraining the four protrusions of the driving entity, thereby making the movement of the movable fixed component more stable.

[0017] 4. Because the component carrier of the present invention includes a carrier shell with an open upper part and a carrier cover plate that closes the carrier shell from the top, and the drive motor is disposed on the upper surface of the carrier cover plate, since the drive motor is difficult to assemble if it is directly assembled inside or on top of the carrier shell due to its heavy weight, the present invention makes it easy to assemble the drive motor by placing it on the carrier cover plate.

[0018] 5. Because the carrier cover plate of the present invention has a vertically extending through-hole, and the drive assembly also includes a coupling, the coupling passes through the through-hole, one end of the coupling is splinedly inserted into the end of the drive screw, and the other end is fixedly sleeved on the output shaft of the drive motor by a connecting screw. That is, the coupling of the drive motor and the drive screw through the coupling only requires one thread lock, and it is easy to achieve that the thread lock direction is the same as that of the through-hole. Therefore, the present invention can easily achieve the coupling of the drive motor and the drive screw located on the inner and outer sides of the component carrier respectively by different connection forms at both ends of the coupling.

[0019] 6. Because the drive assembly of the present invention also includes a motor mounting base disposed on the carrier cover plate, the motor mounting base having a vertically extending and continuous motor positioning countersunk hole and a coupling channel from top to bottom, and an assembly recess formed on the side wall of the motor mounting base that opens the coupling channel to the outside, the assembly recess serves as an operating space for connecting screws, the drive motor is positioned inside the motor positioning countersunk hole, and the output shaft of the drive motor is coupled with the coupling within the coupling channel, therefore, by providing an assembly recess on the motor mounting base, the present invention can conveniently fasten the output shaft of the drive motor and the coupling within the coupling channel.

[0020] 7. Because the linear guide rail of the present invention is fixed on the outer surface of the component carrier and located on opposite sides of the through-hole, and a pair of adjustable sliders are fitted on the linear guide rail, and the pair of adjustable sliders can move towards or away from each other along the linear guide rail, the present invention can adjust the relative distance of the pair of adjustable sliders on the linear guide rail to realize the size of the adsorption area formed by the suction cup on the surface to be measured, thereby further improving the positioning flexibility. Attached Figure Description

[0021] Figure 1 A three-dimensional acoustic emission sensor positioning fixture according to an embodiment of the present invention Figure 1 .

[0022] Figure 2 A three-dimensional acoustic emission sensor positioning fixture according to an embodiment of the present invention Figure 2 .

[0023] Figure 3This is a partial cross-sectional view of the acoustic emission sensor positioning fixture according to an embodiment of the present invention (the mating groove is omitted).

[0024] Figure 4 This is an exploded view of the movable fixing component according to an embodiment of the present invention.

[0025] Figure 5 This is an exploded view of the driving component and component carrier according to an embodiment of the present invention.

[0026] Figure 6 This is an assembly diagram of the drive screw, drive slider, connecting seat, coupling, and tapered sleeve according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of a coupling according to an embodiment of the present invention.

[0028] Figure 8 This is an assembly diagram of the drive entity, drive screw, and mating groove according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the driving entity according to an embodiment of the present invention.

[0030] In the diagram: 100. Acoustic emission sensor positioning fixture; D. Adhesion direction; 10. Component carrier; 11. Carrier housing; 111. Mating groove; 112. Through-hole; 113. Drive setting wall; 12. Carrier cover plate; 121. Through-shaft hole; 20. Adsorption assembly; 21. Linear guide rail; 21a. Stop pit; 22. Adjustable slider; 22a. Stop screw; 23. Scissor lift mechanism; 23a. Coupling rod end; 23b. Fixed distance rod end; 24. Suction cup; P1. First air tube; 30. Movable fixing assembly; 31. Drive entity; 311. Protruding rod; 311a. Mating end; 311b. Connecting end; 32. Coupling entity; 33. Fixing rod. Components, 33a, ball head, 33b, fixed part, P2, second air pipe, 40, drive assembly, 41, drive motor, 42, drive screw, 42a, end spline, 43, drive slider, 44, connecting seat, B, bearing, 45, coupling, 45a, C-type elastic ring, C, connecting screw, 46, motor mounting seat, 46a, motor positioning countersunk hole, 46b, assembly notch, 47, mounting seat cover, 47a, closing cover skirt. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the acoustic emission sensor positioning fixture of the present invention. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0032] The acoustic emission sensor positioning fixture in this embodiment is used to firmly position the acoustic emission sensor (not shown in the figure) on the surface to be measured (not shown in the figure). Specifically, the surface to be measured is a complex curved surface. like Figures 1 to 3 As shown, the acoustic emission sensor positioning fixture 100 includes a component carrier 10, an adsorption component 20, a movable fixing component 30, and a driving component 40.

[0033] The component carrier 10 is a hollow box. The component carrier 10 is placed on the surface to be tested through the adsorption component 20. The movable fixing component 30 is located inside the component carrier 10. The driving component 40 is coupled to the adsorption component 20 through the component carrier 10. The driving component 40 is used to drive the movable fixing component 30 to move toward or away from the surface to be tested.

[0034] The moving direction of the movable fixing component 30 is taken as the contacting direction D. Specifically, the component carrier 10 has a rectangular outer contour, and the bottom surface of the component carrier 10 is perpendicular to the contacting direction D.

[0035] The component carrier 10 includes a detachable carrier housing 11 and a carrier cover plate 12.

[0036] The upper part of the carrier housing 11 is open, and it has a pair of mating grooves 111 and a through opening 112. Specifically, the carrier housing 11 is formed by four rectangular side walls and a bottom plate, that is, the top is completely open. The pair of mating grooves 111 are respectively provided on a pair of opposite inner walls of the carrier housing 11. The extension direction of the pair of mating grooves 111 is parallel to the contact direction D. The through opening 112 is formed on the bottom plate of the carrier housing 11.

[0037] The carrier cover plate 12 covers the top of the carrier housing 11 from the top. The carrier cover plate 12 has a vertically extending through hole 121. The drive assembly 40 passes through the through hole 121. Specifically, there is a pair of through holes 121. The pair of through holes 121 are located near a pair of opposing inner walls of the carrier housing 11. The pair of opposing inner walls are used as drive setting walls 113. The drive setting walls 113 are not the inner walls where the sliding groove 111 is located.

[0038] The adsorption component 20 has a coupling side and an adsorption side, and the coupling side is coupled to the movable fixed component 30 through the component carrier 10.

[0039] The adsorption assembly 20 includes a linear guide rail 21, an adjustable slider 22, a scissor lift mechanism 23, and a suction cup 24. The adsorption side is adsorbed onto the surface to be tested by the suction cup 24.

[0040] Two linear guides 21 are fixed on the bottom surface of the component carrier 10, located on opposite sides of the passage 12 and parallel to each other. Each linear guide 21 is correspondingly equipped with a pair of adjustable sliders 22, and the pair of adjustable sliders 22 can move towards or away from each other along the linear guide 21. Specifically, the adjustable sliders 22 and the linear guides 21 are in a guide shoe-guided fit. Multiple evenly distributed stop pits 21a are formed in the extension direction of the linear guide 21. The adjustable sliders 22 have stop through holes (not shown in the figure) leading to the linear guides 21. When the adjustable sliders 22 move on the linear guides 21, they are selectively aligned with a stop pit 21a through the stop through hole, and a stop screw 22a is inserted into the stop through hole and into the stop pit 21a, thereby realizing the positioning of the adjustable sliders 22 on the linear guides 21.

[0041] There is a pair of scissor lift mechanisms 23, each scissor lift mechanism 23 is coupled to a linear guide rail 21, and the scissor lift mechanism 23 has a coupling side (not shown in the figure) and an adsorption side (not shown in the figure).

[0042] The coupling side includes two coupling rod ends 23a, and the adsorption side includes two fixed-distance rod ends 23b. The two fixed-distance rod ends 23b are respectively provided with suction cups 24. The two coupling rod ends 23a are respectively hinged on a pair of adjustable sliders 22. A pair of scissor-type lifting mechanisms 23 are adsorbed onto the surface to be measured by four suction cups 24. When the two adjustable sliders 22 move to form different spacings, the spacing of the corresponding suction cups 24 is also different. Specifically, the four suction cups 24 are the four corner points of a rectangle, and each suction cup 24 is connected to the first air pipe P1. Air is drawn from the suction cups 24 through the first air pipe P1 to achieve the adsorption of the suction cups 24 onto the surface to be measured.

[0043] The surface to be tested has relatively independent adsorption areas and positioning areas, and the suction cups 24 are adsorbed within the adsorption areas. Specifically, the total area occupied by the four suction cups 24 on the surface to be tested is the adsorption area, and the projection area of ​​the opening 12 on the surface to be tested along the adhesion direction D is the positioning area.

[0044] like Figure 4 and Figure 5 As shown, the movable fixing component 30 includes a driving entity 31, a coupling entity 32, and a fixing rod 33, and the fixing rod 33, the through opening 12, and the positioning area correspond along the contact direction D.

[0045] The circumferential surface of the drive body 31 has four protrusions 311 extending radially in a cross shape. The free ends of two of the protrusions 311 are coupled to the drive assembly 40, and the free ends of the other two protrusions 311 are engaged with the mating grooves 111. Specifically, the two protrusions 311 coupled to the drive assembly 40 extend along a straight line, and the free ends of the two protrusions 311 each form a connecting end 311b, which is coupled to the drive assembly 40 by screwing. The two protrusions 311 engaged with the mating grooves 111 extend along another straight line, and the free ends of the two protrusions 311 each form a mating end 311a that is engaged with the mating grooves. The two straight lines form the diagonals of a square.

[0046] The coupling entity 32 extends along the contact direction D, with one end disposed on the driving entity 31 and the other end forming a ball seat portion (not shown in the attached figure).

[0047] The fixing rod 33 has a ball head 33a and a fixing part 33b. The ball head 33a is ball-jointed with the ball seat part, so that the fixing rod 33 can rotate three-dimensionally relative to 32. The fixing rod 33 fixes the sound sensor through the fixing part 33b, and the fixing part 33b faces the positioning area. Specifically, the fixing part 33b is an adsorption suction cup. The adsorption suction cup is connected to the second air pipe P2. Air is drawn from the adsorption suction cup through the second air pipe P2 to realize the adsorption of the sound sensor by the adsorption suction cup.

[0048] like Figures 6 to 9 As shown, there is a pair of drive components 40, corresponding to a pair of through holes 121. The drive component 40 includes a drive motor 41, a drive screw 42, a drive slider 43, a coupling 45, and a motor mounting base 46.

[0049] The drive motor 41 and the motor mounting base 46 are both located on the upper surface of the carrier cover plate 12. The drive screw 42 and the drive slider 43 are both located inside the carrier housing 11. The coupling 45 passes through the shaft through hole 121, and its two ends are located on the inner and outer sides of the carrier housing 11, respectively.

[0050] The motor mounting base 46 is disposed on the upper surface of the carrier cover plate 12. The motor mounting base 46 has a vertically extending and continuous motor positioning countersunk hole 46a and a coupling channel (not shown in the figure). The drive motor 41 is positioned inside the motor positioning countersunk hole 46a. The coupling channel corresponds vertically to the through shaft hole 121. The output shaft of the drive motor 41 extends into the interior of the coupling channel. In this embodiment, the drive assembly 40 also includes a mounting base cover 47 that closes the motor positioning countersunk hole 46a from the top.

[0051] A mounting recess 46b is formed on the side wall of the motor mounting base 46 to open the coupling channel to the outside. In this embodiment, a pair of closed cover skirts 47a are formed on the opposite lower edge of the mounting base cover 47. When the mounting base cover 47 closes the motor positioning countersunk hole 46a, the closed cover skirts 47a cooperate with the mounting recess 46b.

[0052] The drive screw 42 is disposed on the inner wall of the carrier housing 11 and extends in a direction parallel to the contact direction D. The drive slider 43 is disposed on the drive screw 42. The drive entity 31 is coupled to the drive slider 43. Specifically, the pair of drive screws 42 of the pair of drive components 40 correspond to the pair of through holes 131 in the vertical direction. The top and bottom ends of the drive screw 42 are connected to the drive mounting wall 113 and the bottom surface through the connecting seat 44. The drive screw 42 and the connecting seat 44 are coupled through the bearing B. The pair of drive sliders 43 are coupled to the drive entity 31 through the pair of connecting ends 311b. In this embodiment, the drive screw 42, the drive slider 43, the connecting seat 44 and the bearing B are pre-assembled into a whole and then assembled onto the inner wall of the carrier housing 11.

[0053] One end of the coupling 45 is inserted into the end spline of the drive screw 22, and the other end of the coupling 45 is a C-type elastic ring 45a, which is sleeved with the output shaft of the drive motor 41 in the coupling coupling channel, and the C-type elastic ring 45a is tightened by the connecting screw C. That is, the drive motor 41 is coupled to the output of the drive screw 42 through the coupling 45, and the mounting notch 46a is used as the operating space for operating the connecting screw C with a screwdriver. Specifically, the top of the drive screw 22 forms an end spline 42a, and the coupling 45 is sleeved with the end spline 42a through an internal spline (not shown in the figure) at one end.

[0054] In this embodiment, after assembling the drive screw 42 and drive body 31 inside the carrier housing 11 and completing the engagement of one end of the coupling 45 with the end spline 43a, the carrier housing 12 is covered by the carrier cover plate 12, so that the other ends of the pair of couplings 45 pass through the carrier housing 11 through the pair of shaft through holes 121. At this time, the opening of the coupling channel of the motor mounting base 46 is aligned with the shaft through hole 121, and the motor mounting base 46 is installed on the upper surface of the carrier cover plate 12, so that the coupling 45 passes through the coupling channel. The output shaft of the drive motor 41 is inserted into the C-type elastic ring 45a. Externally, the screwdriver is used to install the notch 46b, and the C-type elastic ring 45a is tightened and fixed on the output shaft of the drive motor 41. Finally, the motor positioning countersunk hole 46a is closed with the mounting base cover 47, thereby completing the assembly of the drive assembly 40.

[0055] The driving component 40 drives the movable fixing component 30 to move through the driving entity 31, thereby moving the acoustic sensor adsorbed on the fixing part 33b to the positioning area and positioning the acoustic sensor close to the positioning area. Specifically, when the acoustic sensor contacts the positioning area and the positioning area is a complex curved surface, the acoustic sensor will adaptively adjust its posture along the complex curved surface under the continuous driving of the fixing rod 33, thereby better fitting the surface to be measured for positioning.

[0056] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A positioning fixture for an acoustic emission sensor, used to firmly position the acoustic emission sensor on the surface to be measured, characterized in that, include: The movable fixing assembly includes a three-dimensionally rotatable fixing rod having a fixing portion facing the surface to be measured, through which the fixing rod fixes the acoustic sensor. The adsorption assembly has a coupling side and an adsorption side, the coupling side being coupled to the movable fixing assembly, and the adsorption side being adsorbed onto the surface to be tested via a suction cup. A driving component, coupled to the adsorption component, is used to drive the movable fixing component to move toward or away from the surface to be tested. The surface to be tested has a relatively independent adsorption area and a positioning area. The suction cup is adsorbed in the adsorption area, the fixing part faces the positioning area, and the driving component moves the movable fixing component by driving the fixing rod to position the sound sensor close to the positioning area.

2. The acoustic emission sensor positioning fixture according to claim 1, characterized in that, Also includes: The component carrier, wherein both the driving component and the movable fixing component are disposed on the component carrier, and the coupling side is connected to the component carrier. The movable fixing assembly further includes a driving entity and a coupling entity, and the fixing rod has a ball head opposite the fixing part. The driving entity is disposed at the output end of the driving component, one end of the coupling entity is disposed on the driving entity, and the other end forms a ball seat portion that is hinged to the ball head.

3. The acoustic emission sensor positioning fixture according to claim 2, characterized in that: in, The component carrier is a hollow box with an opening. The movable fixing component is located inside the component carrier, and the moving direction of the movable fixing component is taken as the contacting direction. The fixing rod, the passage opening, and the positioning area correspond to each other along the contacting direction.

4. The acoustic emission sensor positioning fixture according to claim 3, characterized in that: in, The drive assembly includes a drive motor, a drive screw, and a drive slider. The drive motor is output-coupled with the drive screw. The drive screw is disposed on the inner wall of the assembly carrier and extends in a direction parallel to the contact direction. The drive slider is fitted onto the drive screw. The driving entity is coupled to the driving slider.

5. The acoustic emission sensor positioning fixture according to claim 4, characterized in that: in, The number of drive components is one pair, and the pair of drive screws are located on opposite side walls of the component carrier. The inner wall of the component carrier also forms a pair of opposing sliding grooves that both extend in the contact direction. The circumferential surface of the drive entity has four protrusions extending radially in a cross shape, wherein the free ends of two of the protrusions are coupled to the drive slider, and the free ends of the other two protrusions are engaged with the mating groove.

6. The acoustic emission sensor positioning fixture according to claim 4, characterized in that: in, The component carrier includes a carrier shell that is open at the top and a carrier cover that closes the carrier shell from the top, and the drive motor is disposed on the upper surface of the carrier cover.

7. The acoustic emission sensor positioning fixture according to claim 6, characterized in that: in, The carrier cover plate has a vertically extending through-hole. The drive assembly also includes a coupling that passes through the through-hole. One end of the coupling is splined into the end of the drive screw, and the other end is fixedly sleeved on the output shaft of the drive motor by a connecting screw.

8. The acoustic emission sensor positioning fixture according to claim 7, characterized in that: in, The drive assembly also includes a motor mounting base disposed on the carrier cover plate. The motor mounting base has a vertically extending, continuous top-to-bottom motor positioning countersunk hole and a coupling channel. A mounting recess is formed on the side wall of the motor mounting base, which opens the coupling channel to the outside and serves as an operating space for the connecting screws. The drive motor is positioned inside the motor positioning countersunk hole, and the output shaft of the drive motor is coupled to the coupling within the coupling coupling channel.

9. The acoustic emission sensor positioning fixture according to claim 3, characterized in that: in, The adsorption assembly includes a pair of scissor lift mechanisms. The coupling side includes two coupling rod ends, and the adsorption side includes two fixed-distance rod ends. The two fixed-distance rod ends are respectively provided with suction cups. The pair of scissor lift mechanisms are adsorbed onto the surface to be tested by the four suction cups.

10. The acoustic emission sensor positioning fixture according to claim 9, characterized in that: in, The adsorption assembly also includes a pair of linear guides and two pairs of adjustable sliders corresponding to the scissor lift mechanism. The linear guide rail is fixed on the outer surface of the component carrier and located on opposite sides of the passage opening. A pair of adjustable sliders are fitted on the linear guide rail. The ends of a pair of coupling rods of the scissor lift mechanism are respectively hinged on the pair of adjustable sliders. The pair of adjustable sliders can move towards or away from each other along the linear guide rail.

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