Measuring rod for workpiece surface eddy current detection

Abstract

The invention discloses a measuring rod for workpiece surface eddy current detection, which comprises a probe rod, one end of the probe rod is rotatably connected with an adjusting rod through a rotating shaft, and the other end of the probe rod is connected with a base; the first adjusting assembly is arranged on the base, and the first adjusting assembly is used for controlling the rotation angle of the adjusting rod; the telescopic sleeve is telescopically arranged on the adjusting rod in the axial direction of the adjusting rod, and an eddy current detection probe used for detecting the surface of a workpiece is arranged at the end, away from the probe rod, of the telescopic sleeve; the second adjusting assembly is arranged on the base, and the second adjusting assembly controls the telescopic position of the telescopic sleeve on the adjusting rod, so that the position of the eddy current detection probe in the axial direction of the adjusting rod is controlled. The angle of the eddy current detection probe and the position of the eddy current detection probe in the axial direction of the adjusting rod can be adjusted, so that the eddy current detection probe can be tightly attached to the surface of a workpiece, the requirements of different measurement distances are met, and the detection accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of in-situ eddy current detection, in particular to a measuring rod for eddy current detection on a workpiece surface. Background Art

[0002] In-situ eddy current testing (ISC) is a significant technology that can quickly and effectively detect safety hazards in workpieces without affecting or altering their overall performance. However, in practice, it has been found that due to the confined space and varying curvature of the workpiece's outer surface, existing testing rods are prone to problems such as the probe failing to adhere to the workpiece surface (severely affecting test accuracy) or having a limited test area. Summary of the Invention

[0003] The object of the present invention is to provide a measuring rod for eddy current detection on the surface of a workpiece, so as to solve the existing technical defects and unmet technical requirements.

[0004] To achieve the above object, the present invention provides the following technical solutions: A measuring rod for eddy current detection on a workpiece surface, comprising A probe rod, one end of which is rotatably connected to an adjustment rod via a rotating shaft, and the other end of which is connected to a base; a first adjusting component, the first adjusting component being disposed on the base and being used to control the rotation angle of the adjusting rod; A telescopic sleeve is arranged on the adjusting rod so as to be telescopically extended along the axial direction of the adjusting rod, and an eddy current detection probe for detecting the surface of the workpiece is provided at the end of the telescopic sleeve away from the probe rod; The second adjusting component is arranged on the base, and the second adjusting component controls the telescopic position of the telescopic sleeve on the adjusting rod, thereby controlling the axial position of the eddy current detection probe on the adjusting rod.

[0005] Preferably, the telescopic sleeve is outer-circuited on the adjusting rod, a sliding groove is provided in the adjusting rod along its axial direction, the telescopic sleeve is fixedly connected to a slider, the slider is placed in the sliding groove, and the second adjusting component can drive the slider to slide in the sliding groove.

[0006] Preferably, the slider is fixedly connected to a third pull rope, and multiple sets of guide structures are provided in the slide groove. The two ends of the third pull rope pass around the multiple sets of guide structures and pass through the hollow probe rod, and the two ends of the third pull rope are connected to the second adjustment component. The movement of the two ends of the third pull rope is controlled by the second adjustment component to control the position of the slider in the slide groove.

[0007] Preferably, the third pull rope includes a first parallel section, which remains parallel to the axial direction of the adjustment rod under the guidance of multiple sets of guide structures, and the slider is fixedly connected to the first parallel section.

[0008] Preferably, the second adjustment component includes a winding wheel rotatably arranged on the base, and both ends of the third pull rope are respectively wound on the winding wheel in the same spiral direction. When the winding wheel rotates in the positive direction, one end of the third pull rope is wound on the winding wheel, and the other end of the third pull rope is released from the winding wheel. The rotation of the winding wheel is controlled by automatic control or manual rotation.

[0009] Preferably, a first pull rope and a second pull rope are further included, the head ends of the first pull rope and the second pull rope respectively pass through the hollow probe rod and are respectively connected to the two ends of the adjusting rod, the ends of the first pull rope and the second pull rope are respectively connected to the first adjusting component, and the first pull rope and the second pull rope are controlled by the first adjusting component to be pulled or released, thereby controlling the adjusting rod to rotate around the rotation axis.

[0010] Preferably, the first adjustment assembly includes two sets of linear motion mechanisms, the moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope and the second pull rope, and the two linear motion mechanisms use automatic or manual methods to control the movement of their moving ends.

[0011] Preferably, the end of the eddy current detection probe is connected to an eddy current sensor via a ball joint, and the eddy current sensor can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

[0012] Preferably, a limiting protrusion is provided on one side of the eddy current detection probe, the height of the limiting protrusion exceeds that of the eddy current sensor, the eddy current detection probe is movably installed on the telescopic sleeve along the axial direction of the telescopic sleeve, and an elastic element is provided between the telescopic sleeve and the eddy current detection probe. The elastic element gives the eddy current detection probe an elastic force to pop outward or pull inward, so that the limiting protrusion abuts against the edge of the workpiece, and the detection surface of the eddy current sensor is attached to the surface of the workpiece.

[0013] Preferably, a camera for observation is provided inside the limiting protrusion, and an observation channel is provided through the limiting protrusion along the axial direction of the camera.

[0014] The beneficial effects of the present invention are: The first adjustment component controls the adjustment rod to rotate a certain angle to adjust the angle of the eddy current detection probe, so that the angle between the eddy current detection probe and the edge of the workpiece to be detected is close to vertical, creating conditions for the subsequent eddy current sensor to fit the detection surface; the second adjustment component controls the telescopic sleeve to move along the axial direction of the adjustment rod to adjust the position of the eddy current detection probe on the axial direction of the adjustment rod, thereby adapting to the needs of different measurement distances; through the combination of the ball joint structure and the elastic element, the angle of the eddy current sensor can be adaptively adjusted and can accurately fit the surface of the workpiece, while protecting the eddy current sensor from excessive pressure, thereby improving the accuracy of detection; When the overall structure of the measuring rod is completely retracted, the eddy current detection probe, telescopic sleeve, adjustment rod and probe rod will become a slender rod-shaped structure, which can be inserted into the inner cavity of the equipment through the narrow detection hole. The eddy current detection probe performs eddy current detection on the surface of the workpiece in the inner cavity without disassembling the overall structure of the equipment, thereby realizing rapid in-situ detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 Schematic diagram of the base structure of Example 1; Figure 3 This is an exploded view of the telescopic sleeve structure of Example 1; Figure 4 A side sectional view of the adjustment rod of Example 1; Figure 5 Schematic diagram of the structure of the eddy current detection probe of Example 1; Figure 6 Schematic diagram of the eddy current detection probe structure of Example 2; Figure 7 This is a schematic diagram of the structure of the manual control replacement solution of Example 1; Figure 8 This is a schematic diagram of the first installation structure of the eddy current detection probe of Example 3; Figure 9 This is a schematic diagram of the second installation structure of the eddy current detection probe of Example 3; Figure 10 This is the detection status diagram of the eddy current detection probe during the actual detection process; Figure 11 This is a state diagram of the first eddy current testing probe detecting a workpiece; Figure 12 This is a state diagram of the second type of eddy current testing probe inspecting a workpiece. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0017] like Figure 10 In the actual detection environment, the operator needs to pass the probe rod 1 through the narrow detection hole 002 into the internal sealed space of the equipment, and then the eddy current detection probe on the probe rod 1 performs eddy current detection on the surface of the workpiece 001 inside the equipment. There is no need to disassemble the overall structure of the equipment, and rapid in-situ detection can be achieved.

[0018] like Figures 1 to 5 A measuring rod for eddy current detection on the surface of a workpiece includes a probe rod 1, a first adjustment component 6, a telescopic sleeve 3 and a second adjustment component 7. One end of the probe rod 1 is rotatably connected to the adjustment rod 2 through a rotating shaft 101 set at the end of the probe rod 1, and the other end of the probe rod 1 is connected to a base 5; the first adjustment component 6 is set on the base 5, and the first adjustment component 6 is used to control the rotation angle of the adjustment rod 2.

[0019] It also includes a first pull rope 9 and a second pull rope 10. The head ends of the first pull rope 9 and the second pull rope 10 respectively pass through the hollow probe rod 1 and are respectively connected to the two ends of the adjusting rod 2. The ends of the first pull rope 9 and the second pull rope 10 are respectively connected to the first adjusting component 6. The first adjusting component 6 controls the first pull rope 9 and the second pull rope 10 to be pulled or released, thereby controlling the adjusting rod 2 to rotate around the rotating axis 101.

[0020] The first adjustment assembly 6 includes two sets of linear motion mechanisms, the moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope 9 and the second pull rope 10, and the two linear motion mechanisms are automatically or manually controlled to move their moving ends.

[0021] Specifically, the two linear motion mechanisms use an automatic method to control the movement of their moving ends. The linear motion mechanism is a threaded rod 601 threadedly mounted on the mounting block 605. One end of the two threaded rods 601 is respectively connected to the first pull rope 9 and the second pull rope 10 in a circumferential rotation. The circumferential rotation connection adopts a bearing swivel structure to prevent the threaded rod 601 from causing the first pull rope 9 and the second pull rope 10 to curl when rotating. The other end of the threaded rod 601 is fixedly connected to the output shaft of the first drive motor 602. Two guide rails 603 are provided on the base 5. The two first drive motors 602 are respectively slidably arranged on the corresponding guide rails 603. The first drive motor 602 drives the threaded rod 601 to rotate forward and reverse, driving the threaded rod 601 to move back and forth on the mounting block 605, thereby pulling or releasing the first pull rope 9 or the second pull rope 10, which is used to control the rotation angle of the adjustment rod 2. When the threaded rod 601 moves, the threaded rod 601 will drive the first drive motor 602 to move on the guide rail 603. Alternatively, the two linear motion mechanisms may be replaced by linear motion modules, electric push rods, hydraulic push rods, or pneumatic push rods.

[0022] As an alternative, the two linear motion mechanisms are manually controlled to move their motion ends, as shown in the following example: Figure 7 As shown, the end of the threaded rod 601 is fixedly connected to the knob 604 , and the operator controls the forward and reverse rotation of the threaded rod 601 by rotating the knob 604 , thereby pulling or releasing the first pull rope 9 or the second pull rope 10 .

[0023] The telescopic sleeve 3 is telescopically arranged on the adjusting rod 2 along the axial direction of the adjusting rod 2, and an eddy current detection probe 4 for detecting the surface of the workpiece is provided at the end of the telescopic sleeve 3 away from the probe rod 1; the second adjustment component 7 is arranged on the base 5, and the second adjustment component 7 controls the telescopic position of the telescopic sleeve 3 on the adjusting rod 2, thereby controlling the axial position of the eddy current detection probe 4 on the adjusting rod 2.

[0024] The telescopic sleeve 3 is outer-mounted on the adjusting rod 2 , and a slide groove 201 is provided in the adjusting rod 2 along its axial direction. The telescopic sleeve 3 is fixedly connected to a slider 202 , and the slider 202 is placed in the slide groove 201 . The second adjusting component 7 can drive the slider 202 to slide in the slide groove 201 .

[0025] The slider 202 is fixedly connected to the third pull rope 8. Multiple guide structures are provided within the chute 201. These guide structures may be one or a combination of guide posts and guide wheels. The ends of the third pull rope 8 pass through the multiple guide structures before passing through the hollow probe 1. Both ends of the third pull rope 8 are connected to the second adjustment assembly 7. The second adjustment assembly 7 controls the movement of the ends of the third pull rope 8 and thereby the position of the slider 202 within the chute 201. The third pull rope 8 includes a first parallel section 801. Guided by the multiple guide structures, the first parallel section 801 remains parallel to the axis of the adjustment rod 2. The slider 202 is fixedly connected to the first parallel section 801.

[0026] The second adjustment component 7 includes a winding wheel 701 rotatably arranged on the base 5, and both ends of the third pull rope 8 are respectively wound on the winding wheel 701 in the same spiral direction. When the winding wheel 701 rotates in the positive direction, one end of the third pull rope 8 is wound on the winding wheel 701, and the other end of the third pull rope 8 is released from the winding wheel 701. When the winding wheel 701 rotates in the reverse direction, one end of the third pull rope 8 is released from the winding wheel 701, and the other end of the third pull rope 8 is wound on the winding wheel 701. The winding wheel 701 is controlled to rotate automatically or manually. Specifically, the winding wheel 701 is controlled to rotate in an automatic control manner, and includes a second drive motor 702, which is fixedly arranged on the base 5. The winding wheel 701 is coaxially fixedly connected to the output shaft of the second drive motor 702, and the winding wheel 701 is driven to rotate by the second drive motor 702.

[0027] As an alternative, the winding wheel 701 is controlled by manual rotation, specifically as follows Figure 7 As shown, a rotating handle 703 is provided on the winding wheel 701, and the operator drives the winding wheel 701 to rotate forward and reverse by rotating the handle 703.

[0028] The end of the eddy current detection probe 4 is connected to the eddy current sensor 401 through a ball joint. The eddy current sensor 401 can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

[0029] A limiting protrusion 402 is provided on one side of the eddy current detection probe 4. The height of the limiting protrusion 402 exceeds that of the eddy current sensor 401, so that the limiting protrusion 402 rests on the edge of the workpiece, and the detection surface of the eddy current sensor 401 is attached to the surface of the workpiece to detect the surface of the workpiece.

[0030] A camera 403 for observation is provided inside the limiting protrusion 402 , and an observation channel is provided through the limiting protrusion 402 along the axial direction of the camera 403 . Example 2

[0031] This embodiment refers to the working principle of embodiment 1, with the following differences: like Figure 6 and Figure 12 As shown, a groove 404 is provided on the side of the eddy current detection probe 4, the eddy current sensor 401 is connected to the top of the groove 404 through a ball joint structure, and the camera 403 is arranged at the bottom of the groove 404. The eddy current detection probe 4 can be hooked onto the surface of the workpiece 001 through the groove 404, and the detection surface of the eddy current sensor 401 is attached to the surface of the workpiece to detect the surface of the workpiece. Example 3

[0032] This embodiment refers to the working principles of embodiment 1 and embodiment 2, with the following differences: The eddy current detection probe 4 is movably mounted on the telescopic sleeve 3 along the axial direction of the telescopic sleeve, and an elastic element is provided between the eddy current detection probe 4 and the telescopic sleeve 3, which gives the eddy current detection probe 4 an elastic force to pop outward or pull inward.

[0033] Specifically: the eddy current detection probe 4 is arranged on the telescopic sleeve 3 through a pin structure so as to be telescopically extended along the axial direction of the telescopic sleeve 3. The pin structure prevents the eddy current detection probe 4 from rotating relative to the axis of the telescopic sleeve 3. The elastic element is a spring 301. One end of the spring 301 is abutted against or fixedly connected to the eddy current detection probe 4, and the other end of the spring 301 is abutted against or fixedly connected to the telescopic sleeve 3.

[0034] like Figure 8As shown, when the elastic element gives the eddy current detection probe 4 an elastic force to pop outward, one end of the spring 301 is against the eddy current detection probe 4, and the other end of the spring 301 is against the telescopic sleeve 3. When the eddy current detection probe 4 contacts the workpiece 001 to be detected, the spring 301 is compressed to protect the eddy current sensor from excessive pressure. At the same time, when the probe rod 1 drives the eddy current detection probe 4 to slide along the edge of the workpiece 001 to be detected, the spring 301 always exerts a certain thrust on the eddy current detection probe 4 through its own elastic force, so that the detection surface of the eddy current sensor is always pressed against the surface of the workpiece 001 to be detected, realizing the elastic adaptive expansion and contraction of the eddy current detection probe 4, greatly improving the accuracy of detection. Figure 11 The figure shows the state of the eddy current detection probe 4 when detecting the workpiece 001.

[0035] like Figure 9 As shown, when the elastic element applies an elastic force to the eddy current detection probe 4 to pull inward, one end of the spring 301 is fixedly connected to the eddy current detection probe 4, and the other end of the spring 301 is fixedly connected to the telescopic sleeve 3. When the eddy current detection probe 4 hooks the surface of the workpiece 001 to be detected through the groove, the spring 301 is stretched to protect the eddy current sensor from excessive pressure. At the same time, when the probe rod 1 drives the eddy current detection probe 4 to slide along the edge of the workpiece 001 to be detected, the spring 301 always exerts a certain pulling force on the eddy current detection probe 4 through its own elastic force, so that the detection surface of the eddy current sensor is always pressed against the surface of the workpiece 001 to be detected, realizing the elastic adaptive expansion and contraction of the eddy current detection probe 4, greatly improving the accuracy of detection. Figure 12 The figure shows the state of the eddy current detection probe 4 when detecting the workpiece 001.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A measuring rod for eddy current detection on a workpiece surface, characterized in that: include A probe rod, one end of which is rotatably connected to an adjustment rod via a rotating shaft, and the other end of which is connected to a base; a first adjusting component, the first adjusting component being disposed on the base and being used to control the rotation angle of the adjusting rod; A telescopic sleeve is arranged on the adjusting rod so as to be telescopically extended along the axial direction of the adjusting rod, and an eddy current detection probe for detecting the surface of the workpiece is provided at the end of the telescopic sleeve away from the probe rod; The second adjusting component is arranged on the base, and the second adjusting component controls the telescopic position of the telescopic sleeve on the adjusting rod, thereby controlling the axial position of the eddy current detection probe on the adjusting rod.

2. A measuring rod for eddy current detection on a workpiece surface according to claim 1, characterized in that: The telescopic sleeve is outer-mounted on the adjusting rod, a sliding groove is provided in the adjusting rod along its axial direction, the telescopic sleeve is fixedly connected with a slider, the slider is placed in the sliding groove, and the second adjusting component can drive the slider to slide in the sliding groove.

3. A measuring rod for eddy current detection on a workpiece surface according to claim 2, characterized in that: The slider is fixedly connected to a third pull rope, and multiple sets of guide structures are provided in the slide groove. The two ends of the third pull rope pass around the multiple sets of guide structures and pass through the hollow probe rod, and the two ends of the third pull rope are connected to the second adjustment component. The movement of the two ends of the third pull rope is controlled by the second adjustment component to control the position of the slider in the slide groove.

4. A measuring rod for eddy current detection on a workpiece surface according to claim 3, characterized in that: The third pull rope includes a first parallel section, which is kept parallel to the axis direction of the adjustment rod under the guidance of multiple sets of guide structures, and the slider is fixedly connected to the first parallel section.

5. The measuring rod for eddy current detection on a workpiece surface according to claim 3, characterized in that: The second adjustment component includes a winding wheel rotatably arranged on the base, and both ends of the third pull rope are respectively wound on the winding wheel in the same spiral direction. When the winding wheel rotates in the positive direction, one end of the third pull rope is wound on the winding wheel, and the other end of the third pull rope is released from the winding wheel. The rotation of the winding wheel is controlled by automatic control or manual rotation.

6. The measuring rod for eddy current detection on a workpiece surface according to claim 1, characterized in that: It also includes a first pull rope and a second pull rope, the head ends of the first pull rope and the second pull rope respectively pass through the hollow probe rod and are respectively connected to the two ends of the adjustment rod, and the ends of the first pull rope and the second pull rope are respectively connected to the first adjustment component, and the first adjustment component controls the first pull rope and the second pull rope to be pulled or released, thereby controlling the adjustment rod to rotate around the rotation axis.

7. A measuring rod for eddy current detection on a workpiece surface according to claim 6, characterized in that: The first adjustment assembly includes two sets of linear motion mechanisms, the moving ends of the two linear motion mechanisms are respectively connected to the ends of the first pull rope and the second pull rope, and the two linear motion mechanisms are controlled to move their moving ends automatically or manually.

8. The measuring rod for eddy current detection on a workpiece surface according to claim 1, characterized in that: The end of the eddy current detection probe is connected to an eddy current sensor via a ball joint. The eddy current sensor can rotate around the center of the ball joint within a set angle range to achieve adaptive floating.

9. The measuring rod for eddy current detection on a workpiece surface according to claim 8, characterized in that: A limiting protrusion is provided on one side of the eddy current detection probe, and the height of the limiting protrusion exceeds that of the eddy current sensor. The eddy current detection probe is movably installed on the telescopic sleeve along the axial direction of the telescopic sleeve, and an elastic element is provided between the telescopic sleeve and the eddy current detection probe. The elastic element gives the eddy current detection probe an elastic force to pop outward or pull inward, so that the limiting protrusion abuts against the edge of the workpiece, and the detection surface of the eddy current sensor is in contact with the surface of the workpiece.

10. The measuring rod for eddy current detection on a workpiece surface according to claim 9, characterized in that: A camera for observation is provided inside the limiting protrusion, and an observation channel is provided through the limiting protrusion along the axial direction of the camera.

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