Array eddy current sensor channel consistency detection device

Abstract

The invention relates to an array eddy current sensor channel consistency detection device, which comprises a test block with defects; the clamping mechanism is used for clamping the array eddy current sensor; the moving mechanism is mechanically connected with the clamping mechanism and used for driving the clamping mechanism to move; the control module is electrically connected with the moving mechanism and the array eddy current sensor, and is used for executing the following steps: controlling the moving mechanism and the array eddy current sensor to work during detection, so that each sensing channel of the array eddy current sensor sequentially scans the defects of the test block at a set distance and a set angle; sensing signals output by all channels of the array eddy current sensor in the detection process are obtained, and a plurality of sensing signals are obtained; and generating a consistency detection result according to the plurality of sensing signals. According to the invention, whether the consistency of each sensing channel in the array eddy current sensor meets the use requirement can be efficiently and accurately detected.

Description

Technical Field

[0001] The present invention relates to the technical field of array eddy current sensors, and in particular to a device for detecting the channel consistency of an array eddy current sensor. Background Art

[0002] At present, array eddy current sensors have been widely used in the field of nuclear power detection. With the update of nuclear power equipment, various specifications and models of array eddy current sensors are required, and the performance of the array eddy current sensor determines the accuracy of the detection result. One of the core performances of the array eddy current sensor is channel consistency, that is, for the same defect, the smaller the deviation of the display effect of each channel, the better the channel consistency. The traditional testing method is to emit an excitation signal through a signal generator and input it to each receiving channel of the array eddy current sensor respectively. By comparing the receiving results, the consistency of each sensing channel is determined. However, detecting each sensing channel separately not only takes a long time, has low efficiency, and the detection process is cumbersome and repetitive, requiring manual scanning, which is not suitable for batch detection of instruments, but also the detection result is affected by the subjective judgment of the detection personnel, without a unified standard, resulting in a high risk of human error and low detection reliability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a device for detecting the channel consistency of an array eddy current sensor.

[0004] The technical solution adopted by the present invention to solve its technical problem is to construct a device for detecting the channel consistency of an array eddy current sensor, including:

[0005] A test block with a defect;

[0006] A clamping mechanism for clamping the array eddy current sensor;

[0007] A moving mechanism mechanically connected to the clamping mechanism for driving the clamping mechanism to move; and

[0008] A control module electrically connected to the moving mechanism and the array eddy current sensor, configured to perform the following steps:

[0009] During detection, control the moving mechanism and the array eddy current sensor to work, so that each sensing channel of the array eddy current sensor scans the defect of the test block at a set distance and a set angle in sequence;

[0010] Obtain the sensing signals respectively output by each channel of the array eddy current sensor during the detection process to obtain a plurality of sensing signals;

[0011] Generate a consistency detection result according to the plurality of sensing signals.

[0012] Preferably, the test block includes a flat plate, and a defect groove extending along the width direction of the flat plate is provided on the flat plate; the defect groove includes a groove.

[0013] Preferably, the moving mechanism includes:

[0014] a lead screw, the axial direction of which is parallel to the length direction of the flat plate;

[0015] a support assembly fixed on the flat plate;

[0016] a lead screw fixing assembly provided on the support assembly and rotatably connected to the lead screw;

[0017] a coupling;

[0018] a motor provided on the support assembly, meshed with the lead screw through the coupling, and also electrically connected to the control module, for driving the lead screw to rotate forward or backward based on the control of the control module;

[0019] a guide rail group provided on the support assembly; and

[0020] a load-carrying assembly, slidably connected to the guide rail group, meshed with the lead screw, and mechanically connected to the clamping mechanism. When the lead screw rotates, it drives the load-carrying assembly to slide on the guide rail group, thereby driving the clamping mechanism to translate along the length direction of the flat plate.

[0021] Preferably, the moving mechanism further includes:

[0022] a plurality of limit switches respectively provided at a plurality of set positions on the support assembly; wherein, the plurality of set positions are arranged and distributed along a direction parallel to the length direction of the flat plate; and

[0023] a position dial provided on the load-carrying assembly, for translating along with the load-carrying assembly, so as to trigger the limit switches at corresponding positions based on the stroke during the translation process;

[0024] The control module is also respectively electrically connected to the plurality of limit switches, and the control module is further configured to perform the following steps:

[0025] detect the triggering states of the plurality of limit switches;

[0026] determine the real-time position of the load-carrying assembly according to the triggering states;

[0027] judge whether the real-time position exceeds the set allowable stroke range;

[0028] When the real-time position exceeds the set allowable stroke range, control the motor to stop working.

[0029] Preferably, the support assembly includes:

[0030] Two support arms, respectively installed on both sides of the flat plate; and

[0031] A fixing plate, mechanically connected to the two support arms, for fixing the lead screw fixing assembly, the motor, the guide rail group and the plurality of limit switches.

[0032] Preferably, the lead screw fixing assembly includes:

[0033] A first support seat, installed on the fixing plate and rotatably connected to the end of the lead screw away from the coupling; and

[0034] A second support seat, installed on the fixing plate and rotatably connected to the coupling.

[0035] Preferably, the load-carrying assembly includes:

[0036] A connecting member, engaged with the lead screw and slidably connected to the guide rail group; and

[0037] An adapter plate, one end of which is connected to the connecting member and can be adjusted longitudinally back and forth, and the other end of which is mechanically connected to the clamping mechanism.

[0038] Preferably, the clamping mechanism includes:

[0039] A holding member, mechanically connected to the load-carrying assembly;

[0040] A first clamping arm, rotatably connected to the holding member;

[0041] A second clamping arm, rotatably connected to the holding member; and

[0042] A driving member, for driving the first clamping arm and the second clamping arm to release or clamp the array eddy current sensor.

[0043] Preferably, the holding member includes a structural body, the top of the structural body is mechanically connected to the load-carrying assembly, and a cavity is provided at the bottom of the structural body;

[0044] The first clamping arm includes a first connecting rod disposed in the cavity and rotatably connected to the structural body, and a first abutting portion mechanically connected to the first end of the first connecting rod and exposed outside the cavity;

[0045] The second clamping arm includes a second connecting rod disposed in the cavity and rotatably connected to the structural body, and a second abutting portion mechanically connected to the first end of the second connecting rod and exposed outside the cavity and opposite to the first abutting portion;

[0046] The driving member includes a threaded rod, a nut and a rotatable part respectively arranged at two ends of the threaded rod. The threaded rod is inserted into the cavity with the nut exposed. The threaded rod is screwed to the second end of the first connecting rod, and the rotatable part is rotatably connected to the second end of the second connecting rod. The threaded rod is used to drive the first connecting rod and the second connecting rod to rotate in opposite directions in the cavity, so as to drive the first abutting part and the second abutting part to perform an opening and closing action, thereby loosening or clamping the array eddy current sensor.

[0047] Preferably, the step of generating a consistency detection result according to the plurality of sensing signals includes:

[0048] Calculating the amplitude difference between the largest amplitude and the smallest amplitude among the plurality of sensing signals to calculate the deviation percentage of the amplitude difference from the largest amplitude;

[0049] Calculating the phase difference between the largest phase and the smallest phase among the plurality of sensing signals;

[0050] Judging whether the deviation percentage is less than a set percentage threshold, and judging whether the phase difference is less than a set phase threshold;

[0051] When the deviation percentage is less than the set percentage threshold and the phase difference is less than the set phase threshold, the consistency detection results of each sensing channel are determined to be qualified;

[0052] When the deviation percentage is not less than the set percentage threshold or the phase difference is not less than the set phase threshold, the consistency detection results of each sensing channel are determined to be unqualified.

[0053] Implementing the present invention has the following beneficial effects: providing an array eddy current sensor channel consistency detection device, which can efficiently and accurately detect whether the consistency of each sensing channel in the array eddy current sensor meets the usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0055] Figure 1 is a schematic structural diagram of an array eddy current sensor channel consistency detection device in an embodiment of the present invention;

[0056] Figure 2 is a circuit structure block diagram of an array eddy current sensor channel consistency detection device in an embodiment of the present invention;

[0057] Figure 3 is a schematic structural diagram of a test block in an embodiment of the present invention;

[0058] Figure 4 is a schematic structural diagram of a clamping mechanism in an embodiment of the present invention;

[0059] Figure 5 is a cross-sectional view of the clamping mechanism in an embodiment of the present invention;

[0060] Figure 6 is a schematic structural diagram of a moving mechanism in an embodiment of the present invention;

[0061] Figure 7 is Figure 6 a schematic structural diagram of the enlarged clamping mechanism, defect groove and array eddy current sensor in the embodiment;

[0062] Figure 8 is Figure 6 a schematic structural diagram of the moving mechanism in another angle in the embodiment;

[0063] Figure 9 is a schematic structural diagram of a load-carrying component in an embodiment of the present invention;

[0064] Figure 10 is Figure 9 a front view of the load-carrying component in the embodiment;

[0065] Figure 11 is Figure 9 a schematic structural diagram of the load-carrying component in another angle in the embodiment;

[0066] Figure 12 is Figure 6 a rear view of the moving mechanism in the embodiment;

[0067] Figure 13 is Figure 12 a schematic structural diagram of the enlarged position dial and limit switch in the embodiment;

[0068] Figure 14 is a schematic structural diagram of a fixing plate in an embodiment of the present invention;

[0069] Figure 15 is a schematic structural diagram of a support arm in an embodiment of the present invention. Detailed Embodiments

[0070] For a clearer understanding of the technical features, objectives and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0071] It should be noted that the flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the described order. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined. Therefore, the actual execution order may change according to the actual situation.

[0072] In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the accompanying drawings and are constructed and operated in a specific orientation. This is only for the convenience of describing the technical solution and does not indicate that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0073] Figure 1 is a schematic structural diagram of an array eddy current sensor channel consistency detection device in an embodiment of the present invention. Figure 2 is a circuit structure block diagram of an array eddy current sensor channel consistency detection device in an embodiment of the present invention. This array eddy current sensor channel consistency detection device can efficiently and accurately detect whether the consistency of each sensing channel in the array eddy current sensor meets the usage requirements.

[0074] Please refer to Figure 1 and Figure 2 , this array eddy current sensor channel consistency detection device can include a test block 1, a clamping mechanism 2, a moving mechanism 3, and a control module 4.

[0075] The test block 1 is provided with a defect. The defect is sensed by the array eddy current sensor 10 as the target. It can be understood that, compared with the excitation signal emitted by the signal generator in the traditional detection method, the method of directly sensing the defect by the array eddy current sensor 10 to obtain the output signals of each sensing channel is closer to the working state of the array eddy current sensor 10 during daily use, which helps to improve the detection accuracy.

[0076] In one embodiment, please refer to Figure 3 , the test block 1 can include a flat plate 11, and a defect groove 111 extending along the width direction of the flat plate 11 is provided on the flat plate 11. The defect groove 111 includes defects in the form of a groove, a convex groove, or a crack, etc. The defect groove 111 is preferably a groove. Further, in order to improve the detection accuracy, the part of the flat plate 11 except the defect groove 111 should be kept as consistent as possible and free of defects. Therefore, the flat plate 11 can be a cuboid-shaped metal plate, and the tester can use a grinding device to chisel out a groove (the groove can be a through groove) extending along the width direction of the flat plate 11 on the flat plate 11, so as to obtain the test block 1.

[0077] The clamping mechanism 2 is used to clamp the array eddy current sensor 10.

[0078] In one embodiment, referring to Figure 4 , the clamping mechanism 2 may include a holder 21, a first clamping arm 22, a second clamping arm 23, and a driving member 24.

[0079] The holder 21 is mechanically connected to the load component 37 of the moving mechanism 3, so that when the moving mechanism 3 translates, the holder 21 can be driven to translate together.

[0080] In one embodiment, referring to Figure 5 , the holder 21 may include a structure body 211. The top of the structure body 211 is mechanically connected to the load component 37 of the moving mechanism 3. A cavity 212 for accommodating the first clamping arm 22, the second clamping arm 23, and the driving member 24 is provided at the bottom of the structure body 211. In this embodiment, the top of the structure body 211 can be screwed to the load component 37 of the moving mechanism 3 through bolts, so that the entire clamping mechanism 2 can be detached from the moving mechanism 3 for assembly and maintenance of the clamping mechanism 2. Of course, the structure body 211 can also be connected to the moving mechanism 3 in a welding form.

[0081] The first clamping arm 22 is rotatably connected to the holder 21.

[0082] In one embodiment, referring to Figure 5 , the first clamping arm 22 may include a first connecting rod 221 and a first abutting portion 222. The first connecting rod 221 is disposed in the cavity 212. The middle of the first connecting rod 221 is rotatably connected to the structure body 211. The first end of the first connecting rod 221 is mechanically connected to the first abutting portion 222, and the first abutting portion 222 is exposed outside the cavity 212. Among them, the first connecting rod 221 and the first abutting portion 222 may be an integral structure.

[0083] The second clamping arm 23 is rotatably connected to the holder 21, and the second clamping arm 23 is disposed opposite to the first clamping arm 22.

[0084] In one embodiment, referring to Figure 5 , the second clamping arm 23 may include a second connecting rod 231 and a second abutting portion 232. The second connecting rod 231 is disposed in the cavity 212. The middle of the second connecting rod 231 is rotatably connected to the structure body 211. The first end of the second connecting rod 231 is mechanically connected to the second abutting portion 232, and the second abutting portion 232 is exposed outside the cavity 212. Among them, the second connecting rod 231 and the second abutting portion 232 may be an integral structure.

[0085] The driving member 24 cooperates with the first clamping arm 22 and the second clamping arm 23, and the driving member 24 is used to drive the first clamping arm 22 and the second clamping arm 23 to release or clamp the array eddy current sensor 10.

[0086] In one embodiment, please refer to Figure 5 , the driving member 24 may include a threaded rod 241, and a nut 242 and a rotatable portion 243 respectively disposed at both ends of the threaded rod 241. The threaded rod 241 is inserted into the cavity 212 and the nut 242 is exposed outside the cavity 212. The threaded rod 241 is screwed to the second end of the first connecting rod 221, and the rotatable portion 243 is rotatably connected to the second end of the second connecting rod 231. The threaded rod 241 is used to drive the first connecting rod 221 and the second connecting rod 231 to rotate in opposite directions within the cavity 212, so as to drive the first abutting portion 222 and the second abutting portion 232 to perform opening and closing actions, thereby realizing the action of releasing or clamping the array eddy current sensor 10.

[0087] Further, the nut 242 and the threaded rod 241 may be an integral structure. One end of the threaded rod 241 away from the nut 242 is rotatably connected to the rotatable portion 243, so that the rotatable portion 243 can swing slightly up and down along the radial direction of the threaded rod 241.

[0088] Please refer to Figure 5 , the working principle of the clamping mechanism 2 is as follows: The operator can drive the threaded rod 241 to rotate by rotating the nut 242. When the threaded rod 241 rotates, the second end of the first connecting rod 221 and the second end of the second connecting rod 231 will approach or separate from each other. It is easy to understand that when the two approach each other, the clamping mechanism 2 performs a releasing action, and when the two separate from each other, the clamping mechanism 2 performs a clamping action.

[0089] To avoid interfering with the rotation of the first clamping arm 22 and the second clamping arm 23, as Figure 4 and Figure 5 shown, a through groove is provided at the bottom of the structure body 211 to form the cavity 212.

[0090] The moving mechanism 3 is mechanically connected to the clamping mechanism 2. The moving mechanism 3 is used to drive the clamping mechanism 2 to move, so that each sensing channel of the array eddy current sensor 10 clamped by the clamping mechanism 2 can sense the defects on the test block 1 at the same distance and the same angle, that is, to ensure that the sensing objects and the environments of each sensing channel are as consistent as possible, so as to ensure the detection accuracy.

[0091] In one embodiment, please refer to Figure 6 , the moving mechanism 3 may include a lead screw 31, a support assembly 32, a lead screw fixing assembly 33, a coupling 34, a motor 35, a guide rail group 36 and a load-carrying assembly 37.

[0092] Specifically, the lead screw fixing assembly 33, the motor 35, and the guide rail group 36 are all arranged on the support assembly 32. The lead screw 31 is rotatably connected to the lead screw fixing assembly 33 so that the lead screw 31 is installed on the support assembly 32, and the axial direction of the lead screw 31 and the guiding direction of the guide rail group 36 are parallel to the length direction of the flat plate 11. The lead screw 31 is also meshed with the motor 35 through a coupling 34. The load-carrying assembly 37 is slidably connected to the guide rail group 36, meshed with the lead screw 31, and mechanically connected to the clamping mechanism 2. The motor 35 is also electrically connected to the control module 4. The motor 35 is used to drive the lead screw 31 to rotate forward or backward based on the control of the control module 4. When the lead screw 31 rotates, it will drive the load-carrying assembly 37 to slide along the length direction of the flat plate 11 on the guide rail group 36, thereby driving the clamping mechanism 2 to translate along the length direction of the flat plate 11. The support assembly 32 is fixed on the flat plate 11 to keep the position of the defect relative to the support assembly 32 unchanged. After the clamping mechanism 2 clamps the array eddy current sensor 10, please refer to Figure 7 , when the motor 35 rotates, it will drive the array eddy current sensor 10 to translate along the length direction A of the flat plate 11 or in the opposite direction. The arrow B corresponds to the sensing angles of the respective sensing channels of the array eddy current sensor 10. When the array eddy current sensor 10 translates to be directly opposite the defect groove 111, each sensing channel will sense the defect groove 111 in sequence at the same height and the same angle, ensuring that the sensing objects and the environments of the respective sensing channels are consistent.

[0093] Of course, the moving mechanism 3 can also be replaced by a robotic arm, but the control accuracy of the robotic arm is relatively poor, which will have a certain impact on the detection accuracy.

[0094] In one embodiment, please refer to Figure 6 , the support assembly 32 may include two support arms 321 and a fixing plate 322. The two support arms 321 are respectively installed on both sides of the flat plate 11 (not shown), and the support arms 321 can be fixed by welding, screwing, etc. The fixing plate 322 is mechanically connected to the two support arms 321. The lead screw fixing assembly 33, the motor 35, the guide rail group 36, and multiple limit switches 38 are all installed and fixed on the fixing plate 322.

[0095] In one embodiment, please refer to Figure 6 , the lead screw fixing assembly 33 may include a first support seat 331 and a second support seat 332. The first support seat 331 is installed on the fixing plate 322 and is rotatably connected to the end of the lead screw 31 away from the coupling 34. The second support seat 332 is installed on the fixing plate 322 and is rotatably connected to the coupling 34. It can be understood that the functions of the first support seat 331 and the second support seat 332 are to support the lead screw 31 so that the lead screw 31 can rotate on the two support seats while being installed on the fixing plate 322.

[0096] In one of the embodiments, please refer to Figure 8 , the guide rail group 36 may include two guide rails, which are respectively mounted on the fixing plate 322 and are slidably connected to the load component 37. The guiding directions of the two guide rails are parallel to the length direction of the flat plate 11.

[0097] In one embodiment, please refer to Figure 8 and Figure 9 , the load component 37 may include a connecting member 371 and an adapter plate 372.

[0098] The connecting member 371 meshes with the lead screw 31 and is slidably connected to the guide rail group 36.

[0099] In one embodiment. Please refer to Figure 9 , the connecting member 371 may include a sliding plate 3711, a nut block 3713, and four guide blocks 3712. The nut block 3713 and each guide block 3712 are respectively mechanically connected to the sliding plate 3711 and fixed on the sliding plate 3711. The nut block 3713 also meshes with the lead screw 31 to achieve transmission. The four guide blocks 3712 are respectively slidably connected to the two guide rails in pairs of two. The sliding plate 3711 is also mechanically connected to the adapter plate 372.

[0100] Please refer to Figure 10 , one end of the adapter plate 372 is connected to the sliding plate 3711 in the connecting member 371 and reciprocally adjusted longitudinally on the sliding plate 3711. The other end of the adapter plate 372 is mechanically connected to the clamping mechanism 2. It should be noted that "longitudinally" is consistent with the direction perpendicular to the flat plate 11.

[0101] In one embodiment, please refer to Figure 10 and Figure 11 , the adapter plate 372 may include a first plate member 3721 and a second plate member 3722. Two capsule-shaped through holes 3723 are provided in parallel at one end of the first plate member 3721, and bolts can be used to pass through the two capsule-shaped through holes 3723 to mount the first plate member 3721 to the sliding plate 3711. The other end of the first plate member 3721 is connected to the second plate member 3722, and the second plate member 3722 is also mechanically connected to the clamping mechanism 2 (which can be achieved by logical means). Among them, the first plate member 3721 and the second plate member 3722 may be an integral structure.

[0102] Please refer to Figure 10, in this embodiment, the inspector can adjust the longitudinal height of the adapter plate 372 by controlling the locking position of the bolt after passing through the capsule-shaped through hole 3723, so as to adjust the height of the clamping mechanism 2, and further ensure that the height of the array eddy current sensor 10 is appropriate when sensing the defect groove 111. Usually, the distance between the array eddy current sensor 10 and the defect groove 111 is just in contact. Of course, this height can also be equal to the distance between the array eddy current sensor 10 and the sensed target when it is installed on site.

[0103] The control module 4 is electrically connected to the moving mechanism 3 and the array eddy current sensor 10, and is used to execute the following steps S1 to S3.

[0104] Step S1 includes: controlling the moving mechanism 3 and the array eddy current sensor 10 to work during detection, so that each sensing channel of the array eddy current sensor 10 scans the defects of the test block 1 in sequence at a set distance and a set angle. Specifically, the control module 4 can control the motor 35 in the moving mechanism 3 to work, so that the clamping mechanism 2 translates along direction A (please refer to Figure 7 ), meanwhile, the control module 4 will also control the array eddy current sensor 10 to be in a working state to wait for detecting the defect groove 111.

[0105] Step S2 includes: obtaining the sensing signals respectively output by each channel of the array eddy current sensor 10 during the detection process to obtain a plurality of sensing signals.

[0106] Step S3 includes: generating a consistency detection result according to the plurality of sensing signals.

[0107] In one embodiment, the step of generating a consistency detection result according to the plurality of sensing signals may include: calculating the amplitude difference between the largest amplitude and the smallest amplitude among the plurality of sensing signals to calculate the deviation percentage of the amplitude difference from the largest amplitude; calculating the phase difference between the largest phase and the smallest phase among the plurality of sensing signals; judging whether the deviation percentage is less than the set percentage threshold, and judging whether the phase difference is less than the set phase threshold; when the deviation percentage is less than the set percentage threshold and the phase difference is less than the set phase threshold, the consistency detection result of each sensing channel is determined to be qualified; when the deviation percentage is not less than the set percentage threshold or the phase difference is not less than the set phase threshold, the consistency detection result of each sensing channel is determined to be unqualified.

[0108] It should be noted that the largest amplitude refers to the sensing signal with the largest amplitude among the plurality of sensing signals, the smallest amplitude refers to the sensing signal with the smallest amplitude among the plurality of sensing signals, the largest phase refers to the sensing signal with the largest phase among the plurality of sensing signals, and the smallest phase refers to the sensing signal with the smallest phase among the plurality of sensing signals. In addition, the calculation methods of the amplitude and phase of each sensing signal please refer to the prior art and will not be elaborated here.

[0109] In one embodiment, the expression of the percentage deviation can be: C = ΔA / Amax * 100%, where C represents the percentage deviation, ΔA represents the amplitude difference, and Amax represents the maximum amplitude.

[0110] Optionally, the setting range of the set percentage threshold is 1% to 3%, and the setting range of the set percentage threshold is 1% to 3%. Among them, the set percentage threshold is preferably 3%, and the set phase threshold is preferably 5°.

[0111] In one embodiment, please refer to Figure 12 , the moving mechanism 3 may further include a position dial 39 and a plurality of limit switches 38.

[0112] The plurality of limit switches 38 are respectively arranged at a plurality of set positions on the fixed plate 322 in the support assembly 32. Among them, the plurality of set positions are arranged and distributed along the length direction parallel to the flat plate 11. The position dial 39 is arranged on the nut block 3713 of the load-carrying assembly 37. The position dial 39 is used to follow the translation of the load-carrying assembly 37 to trigger the corresponding limit switch 38 at a corresponding position during the translation process. Specifically, the limit switch 38 can be an existing opposed photoelectric sensor. Please refer to Figure 13 , when the load-carrying assembly 37 translates to the set position of a certain limit switch 38, the position dial 39 will block the limit switch 38, making the limit switch 38 unable to perform normal opposed radiation, which is equivalent to triggering the limit switch 38.

[0113] Correspondingly, please refer to Figure 2 , the control module 4 is also electrically connected to the plurality of limit switches 38 respectively. The control module 4 is further configured to perform the following steps: detect the trigger states of the plurality of limit switches 38; determine the real-time position of the load-carrying assembly 37 according to the trigger states; judge whether the real-time position exceeds the set allowable travel range; when the real-time position exceeds the set allowable travel range, control the motor 35 to stop working. Specifically, please refer to Figure 12, assuming that when the motor 35 rotates forward, the nut block 3713 moves horizontally to the right. The leftmost limit switch 38 can be defined as the zero-limit side limit switch, the second limit switch 38 from the left can be defined as the zero-point limit switch, the rightmost limit switch 38 can be defined as the end-limit side limit switch, and the second limit switch 38 from the right can be defined as the end-point limit switch. When the zero-limit side limit switch is triggered, it indicates that the nut block 3713 has moved to the left limit and exceeded the allowable stroke range. To prevent the nut block 3713 from colliding with the first support base 331, the control module 4 will immediately control the motor 35 to stop working and only allow the motor 35 to rotate forward. When the end-limit side limit switch is triggered, it indicates that the nut block 3713 has moved to the right limit and exceeded the allowable stroke range. To prevent the nut block 3713 from colliding with the coupling 34, the control module 4 will immediately control the motor 35 to stop working and only allow the motor 35 to rotate in reverse. When the zero-point limit switch is triggered, it indicates that the nut block 3713 has moved to the zero point. When the end-point limit switch is triggered, it indicates that the nut block 3713 has moved to the end point.

[0114] In order to reduce the amount of sensed signals, in one embodiment, the number of limit switches 38 can be five. Correspondingly, the limit switch 38 located in the middle position (i.e., the remaining limit switches 38) can also be defined as the defect-location limit switch. When the defect-location limit switch is triggered, it indicates that the nut block 3713 is close to the defect groove 111. The control module 4 can control the array eddy current sensor 10 to work only when the defect-location limit switch is triggered.

[0115] In one embodiment, please refer to Figure 12 and Figure 14 , a rectangular through-hole 3221 is provided in the fixing plate 322. The first support base 331, the second support base 332, and the motor 35 are installed on the first side of the fixing plate 322, so as to be arranged on the first side of the lead screw 31. A part of the nut block 3713 passes through the rectangular through-hole 3221 and meshes with the lead screw 31. The part of the nut block 3713 that does not pass through is mechanically connected to the sliding plate 3711, so that the sliding plate 3711 is installed on the second side of the fixing plate 322 (opposite to the first side of the fixing plate 322). The purpose of this embodiment is to reasonably distribute the equipment weights on both sides of the fixing plate 322 to minimize the load on the two support arms 321.

[0116] Since a relatively heavy motor is provided on the first side of the lead screw 31, in order to improve the supporting performance of the support arm 321 on this side, in one embodiment, please refer to Figure 15, each support arm 321 may include a first support plate 3211 and a second support plate 3212. The first support plate 3211 may be rectangular, and the second support plate 3212 may be right-angled triangular. The upper part of the first side of the first support plate 3211 is mechanically connected to the fixed plate 322. One of the triangular sides of the second support plate 3212 is closely mounted on the second side of the first support plate 3211 (opposite to the first side of the first support plate 3211), and the other triangular side of the second support plate 3212 is flush with the lower part of the first support plate 3211 for connecting the flat plate 11.

[0117] In one embodiment, refer to Figure 1 , the array eddy current sensor channel consistency detection device may further include a scale 5. The scale 5 is used to be placed on the test block 1 (i.e., the flat plate 11). Since the sizes of different types of array eddy current sensors 10 may be different, in order to facilitate more accurately determining the position of the defect feature in the sensing signal, during the detection process, the detector can place the scale 5 on the test block 1 based on a certain rule. Specifically, the scale 5 is parallel to the length direction of the flat plate 11. When the nut block 3713 moves to the zero point, the zero point of the scale 5 coincides with the center line of the array eddy current sensor 10. In this way, the distance between the center line of the array eddy current sensor 10 and the defect groove 111 in the length direction of the flat plate 11 can be determined by observing the scale 5, which is equivalent to the distance that the array eddy current sensor 10 needs to be translated during the detection process (denoted as the theoretical translation distance). It can be understood that the staff can input the theoretical translation distance into the control module 4 through the man-machine operation module, so that the control module 4 can combine the translation speed of the nut block 3713, the theoretical translation distance, and the triggering moment of the limit switch at the defect to determine the approximate waveform position containing the defect feature in the sensing signals output by each sensing channel, which helps to improve the detection accuracy.

[0118] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0119] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered as exceeding the scope of the present invention.

[0120] The steps of the methods or algorithms described in combination with the embodiments disclosed herein can be directly implemented by hardware, software modules executed by a processor, or a combination of the two. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field.

[0121] It can be understood that the above embodiments only represent the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can also be made, all of which belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An array eddy current sensor channel consistency detection device, characterized in that, Comprising: A test block (1) with defects; A clamping mechanism (2) for clamping an array eddy current sensor; A moving mechanism (3) mechanically connected to the clamping mechanism (2) for driving the clamping mechanism (2) to move; And A control module (4) electrically connected to the moving mechanism (3) and the array eddy current sensor, for performing the following steps: Controlling the moving mechanism (3) and the array eddy current sensor to work during detection, so that each sensing channel of the array eddy current sensor scans the defects of the test block (1) in sequence at a set distance and a set angle; Obtaining the sensing signals respectively output by each channel of the array eddy current sensor during the detection process to obtain a plurality of sensing signals; Generating a consistency detection result according to the plurality of sensing signals.

2. The array eddy current sensor channel consistency detection device according to claim 1, wherein The test block (1) includes a flat plate (11), and a defect groove (111) extending along the width direction thereof is provided on the flat plate (11); the defect groove (111) includes a groove.

3. The array eddy current sensor channel consistency detection device according to claim 2, wherein, The moving mechanism (3) includes: A lead screw (31) whose axial direction is parallel to the length direction of the flat plate (11); A support assembly (32) fixed on the flat plate (11); A lead screw fixing assembly (33) provided on the support assembly (32) and rotatably connected to the lead screw (31); A coupling (34); A motor (35) provided on the support assembly (32), meshed with the lead screw (31) through the coupling (34), and also electrically connected to the control module (4), for driving the lead screw (31) to rotate forward or backward based on the control of the control module (4); A guide rail group (36) provided on the support assembly (32); and A load-carrying assembly (37) slidably connected to the guide rail group (36), meshed with the lead screw (31), and mechanically connected to the clamping mechanism (2). When the lead screw (31) rotates, it drives the load-carrying assembly (37) to slide on the guide rail group (36), thereby driving the clamping mechanism (2) to translate along the length direction of the flat plate (11).

4. The array eddy current sensor channel consistency detection device according to claim 3, wherein The moving mechanism (3) further includes: A plurality of limit switches (38) respectively provided at a plurality of set positions on the support assembly (32); wherein, the plurality of set positions are arranged and distributed along the length direction parallel to the flat plate (11); and A position dial (39) provided on the load-carrying assembly (37) for translating along with the load-carrying assembly (37) to trigger the limit switches (38) at corresponding positions based on the stroke during the translation; The control module (4) is also electrically connected to the plurality of limit switches (38) respectively, and the control module (4) is further used for performing the following steps: Detecting the triggering states of the plurality of limit switches (38); Determining the real-time position of the load-carrying assembly (37) according to the triggering states; Judging whether the real-time position exceeds the set allowable stroke range; When the real-time position exceeds the set allowable stroke range, controlling the motor (35) to stop working.

5. The array eddy current sensor channel consistency detection device according to claim 4, characterized in that, The support assembly (32) includes: Two support arms (321), respectively installed on both sides of the flat plate (11); and A fixing plate (322), mechanically connected to the two support arms (321), for fixing the lead screw fixing assembly (33), the motor (35), the guide rail group (36) and the multiple limit switches (38).

6. The array eddy current sensor channel consistency detection device according to claim 5, wherein The lead screw fixing assembly (33) includes: A first support seat (331), installed on the fixing plate (322) and rotatably connected to the end of the lead screw (31) far from the coupling (34); and A second support seat (332), installed on the fixing plate (322) and rotatably connected to the coupling (34).

7. The array eddy current sensor channel consistency detection device according to claim 4, wherein The load-carrying assembly (37) includes: A connecting member (371), engaged with the lead screw (31) and slidably connected to the guide rail group (36); and An adapter plate (372), one end of which is connected to the connecting member (371) and can be adjusted longitudinally back and forth, and the other end of which is mechanically connected to the clamping mechanism (2).

8. The array eddy current sensor channel consistency detection device according to claim 4, characterized in that The clamping mechanism (2) includes: A holding member (21), mechanically connected to the load-carrying assembly (37); A first clamping arm (22), rotatably connected to the holding member (21); A second clamping arm (23), rotatably connected to the holding member (21); and A driving member (24), for driving the first clamping arm (22) and the second clamping arm (23) to loosen or clamp the array eddy current sensor.

9. The array eddy current sensor channel consistency detection device according to claim 8, characterized in that The holding member (21) includes a structure body (211), the top of the structure body (211) is mechanically connected to the load-carrying assembly (37), and a cavity (212) is provided at the bottom of the structure body (211); The first clamping arm (22) includes a first connecting rod (221) disposed in the cavity (212) and rotatably connected to the structure body (211), and a first abutting portion (222) mechanically connected to the first end of the first connecting rod (221) and exposed outside the cavity (212); The second clamping arm (23) includes a second connecting rod (231) disposed in the cavity (212) and rotatably connected to the structure body (211), and a second abutting portion (232) mechanically connected to the first end of the second connecting rod (231) and exposed outside the cavity (212) and opposite to the first abutting portion (222); The driving member (24) includes a threaded rod (241), a nut (242) and a rotatable part (243) respectively provided at both ends of the threaded rod (241). The threaded rod (241) is inserted into the cavity (212) with the nut (242) exposed. The threaded rod (241) is screwed to the second end of the first connecting rod (221), and the rotatable part (243) is rotatably connected to the second end of the second connecting rod (231). The threaded rod (241) is configured to drive the first connecting rod (221) and the second connecting rod (231) to rotate in opposite directions within the cavity (212), so as to drive the first abutting part (222) and the second abutting part (232) to perform an opening and closing action, thereby loosening or clamping the array eddy current sensor.

10. The array eddy current sensor channel consistency detection device according to any one of claims 1 to 9, characterized in that, The step of generating a consistency detection result according to the plurality of the sensing signals includes: Calculating an amplitude difference between the maximum amplitude and the minimum amplitude among the plurality of the sensing signals to calculate a deviation percentage of the amplitude difference from the maximum amplitude; Calculating a phase difference between the maximum phase and the minimum phase among the plurality of the sensing signals; Judging whether the deviation percentage is less than a set percentage threshold and judging whether the phase difference is less than a set phase threshold; When the deviation percentage is less than the set percentage threshold and the phase difference is less than the set phase threshold, setting the consistency detection results of the respective sensing channels as qualified; When the deviation percentage is not less than the set percentage threshold or the phase difference is not less than the set phase threshold, setting the consistency detection results of the respective sensing channels as unqualified.

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