Coating thickness gauge and multi-frequency eddy current probe self-adaptive scanner

Abstract

The invention belongs to the technical field of thickness measuring equipment, and particularly relates to a coating thickness gauge and a multi-frequency eddy current probe self-adaptive scanner. The detection assembly comprises an annular frame, an electromagnetic probe and an eddy current probe, the electromagnetic probe and the eddy current probe are fixedly installed at the two ends of the annular frame, an annular through groove is formed in the center of the annular frame, a center supporting column is movably installed in the annular through groove, and the two sides of the annular frame are annularly sleeved with U-shaped frames rotationally connected with the center supporting column; the electromagnetic probe and the eddy current probe rotate reversely in the U-shaped frame under the gravity of the electromagnetic probe and the eddy current probe, and the U-shaped frame is connected with a data connecting line used for being electrically connected with a machine body; and hardening the rubber sleeve so as to convert the data connecting line into a rigid state during inflation. According to the device, one-man operation can be more convenient in narrow space, the detection probes can be freely switched according to needs, meanwhile, the detection probes can be movably placed without the help of auxiliary equipment, the detection convenience and efficiency are improved, and the detection precision is improved.

Description

Technical Field

[0001] This invention belongs to the field of thickness measurement equipment technology, specifically relating to a coating thickness gauge and a multi-frequency eddy current probe adaptive scanner. Background Technology

[0002] A coating thickness gauge is a non-destructive testing instrument primarily used to measure the thickness of coatings or platings on the surface of metal substrates, and can simultaneously evaluate coating quality (such as uniformity and adhesion). Its working principle is mainly based on two core technologies: electromagnetic induction and eddy current methods, enabling accurate measurement of coating thickness. Magnetic thickness measurement, based on Faraday's law of electromagnetic induction, calculates thickness by measuring the change in magnetic induction intensity caused by the coating, and is suitable for non-magnetic coatings (such as aluminum, chromium, and rubber) on magnetic substrates (such as steel and iron). Eddy current thickness measurement utilizes high-frequency alternating current to generate eddy currents in a conductor, and infers coating thickness from changes in eddy currents; it is suitable for non-conductive layers (such as paint and plastics) on non-magnetic metal substrates (such as copper and aluminum).

[0003] Existing coating thickness gauges are generally equipped with two independent sensor probes. In practical measurement applications, due to the different materials and coatings of pipes, it is necessary to constantly replace the detection probes. However, some pipes are placed in confined spaces where it is impossible to reach with an arm, making probe placement cumbersome and requiring the use of rod-shaped supports or other equipment for auxiliary testing. After testing, if the detection probe needs to be replaced, the used probe must be removed and replaced with a new one. In confined spaces, this operation is not only cumbersome and affects testing efficiency, but also requires multiple people to cooperate. Poor coordination can also affect testing accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a coating thickness gauge and a multi-frequency eddy current probe adaptive scanner, which makes single-person operation more convenient in confined spaces, and allows for free switching of detection probes as needed. At the same time, it eliminates the need for auxiliary equipment to move and place the detection probes, thereby improving detection convenience and efficiency, and enhancing detection accuracy.

[0005] The specific technical solution adopted by this invention is as follows: A coating thickness gauge and a multi-frequency eddy current probe adaptive scanner, comprising: Organism; The detection assembly includes an annular frame and an electromagnetic probe and an eddy current probe fixedly installed at both ends of the annular frame. The annular frame has an annular through groove in the center and a central support column is movably installed therein. The two sides of the annular frame are fitted with U-shaped frames that are rotatably connected to the central support column, so that the electromagnetic probe and the eddy current probe can rotate upside down under their own gravity within the U-shaped frames. A magnetic attraction mechanism is provided between the annular frame and the central support column to hold the central support column at one end of the annular frame. A data connection line for electrical connection with the machine body is connected to the U-shaped frame. A hardened rubber sleeve is provided, which is wrapped around one end of the data connection cable near the U-shaped frame, and an inflation gap is provided between the two to convert the data connection cable into a rigid state when inflated.

[0006] As a preferred embodiment, the magnetic attraction mechanism includes a limiting ring embedded in the inner wall of the annular frame and a magnetic ring sleeved on the central support column. The two semicircular ends of the limiting ring are made of magnetic material, and the remaining part is made of non-magnetic material. The outer diameter of the magnetic ring is the same as the maximum outer diameter of the central support column.

[0007] As a preferred embodiment, the two ends of the central support are fixedly connected to bearings that are fixedly embedded in the bottom of the U-shaped frame. The ends of the electromagnetic probe and the eddy current probe away from the annular frame are both fixedly equipped with counterweight rings, so that the two can rotate and reverse around the central support under the torque difference of the counterweight rings.

[0008] As a preferred embodiment, the central support column has an annular groove in the middle, and an electrical connecting ring is embedded in the groove. The electrical connecting ring is electrically connected to the data connection line. The ends of the electromagnetic probe and the eddy current probe near the annular frame are slidably embedded with electrical connecting ends connected to the electrical connecting ring. A limiting spring is installed on the electrical connecting end to limit its position so that it abuts against the inside of the electrical connecting ring.

[0009] As a preferred embodiment, the exposed end of the electrical connection head is hemispherical, the cross-section of the electrical connection ring is semi-circular, and the inner diameter of the annular groove on the electrical connection ring is the same as the radius of the exposed end of the electrical connection head.

[0010] As a preferred embodiment, the hardened sleeve includes an inner membrane and an outer membrane, as well as a braided layer between them. The inner and outer membranes are double-layered membranes made of PVC / PBO composite material or PVC / PVDF composite material, and their surfaces are coated with an aerogel coating to form a protective layer. The braided layer is made of polyester filaments, acrylic filaments, or glass fiber filaments interwoven into single warp threads, which are arranged in parallel between the inner and outer membranes. After inflation, the gas pressure is used to straighten the warp threads and convert the data connection line into a rigid state.

[0011] As a preferred embodiment, the inflatable end of the hardened rubber sleeve is provided with a spherical airbag, the top of the spherical airbag is provided with an inflation port, and an inflation hose connected to the inflation port is connected to the hardened rubber sleeve to inflate air into the gap between the hardened rubber sleeve and the data connection line. A one-way air valve for supplying gas to the spherical airbag is provided on one side of the top of the spherical airbag, and a manual vent valve for venting air between the inflation hose and the hardened rubber sleeve is installed at the top of the spherical airbag.

[0012] As a preferred embodiment, the inflatable hose has a semi-circular cross-section and wraps around the outer surface of the data connection cable, with the inflatable hose extending to the end of the data connection cable that is inserted into the body.

[0013] As a preferred embodiment, the device further includes a clamping assembly for holding and placing the device, comprising a watch strap worn on the wrist and an upper support detachably connected to the watch strap. A clamping plate is fixedly mounted on the top surface of the upper support. Symmetrical "V"-shaped side elastic clamping plates are integrally formed at both ends of the clamping plate. U-shaped elastic pieces for bending deformation are provided at the bends of the side elastic clamping plates and the clamping plate. An abutting elastic piece that abuts against the side of the device is provided at the top of the side elastic clamping plates.

[0014] As a preferred embodiment, the upper support has connecting grooves on both sides near the watch strap, and a connecting ring is rotatably connected to one end of the watch strap near the upper support. A connecting block embedded in the connecting groove is fixedly installed on the connecting ring, and connecting buckles and matching connecting holes are provided at the opposite ends of the two sets of watch straps.

[0015] The technical effects achieved by this invention are as follows: This invention utilizes a data connection cable that works in conjunction with a hardened rubber sleeve. In its uninflated state, the cable can be bent arbitrarily, allowing it to be inserted into confined spaces as needed. The electromagnetic probe and eddy current probe are then placed at the location of the pipe to be inspected. The hardened rubber sleeve allows for inflation into the gap between it and the data connection cable. The inflated gas pressure tauts the warp threads, transforming the mesh structure into a rigid framework. The membrane expands into a stable cylindrical pipe, allowing operators to control the inspection components using the rigid rubber sleeve and data connection cable, and move them to the desired position. One of the electromagnetic probes or the eddy current probe is then placed against the pipe surface for inspection. This design makes operation in confined spaces more convenient, eliminating the need for auxiliary equipment and thus improving inspection convenience and efficiency.

[0016] This invention, by setting up a clamping component, allows the device to be worn on the operator's arm using a strap, while the device body is horizontally clamped onto the clamping plate. This frees up one of the operator's hands, allowing them to hold the spherical airbag and continuously squeeze it to supply gas when needed. Meanwhile, the operator's other hand can hold the hardened rubber sleeve, enabling one operator to complete the testing operation and improving testing efficiency.

[0017] This invention utilizes a combination of a ring frame, a U-shaped frame, and a central support pillar to allow the electromagnetic probe and the eddy current probe to rotate around the central pillar. When the data connection cable and the hardened sleeve are in a rigid state, lifting and slightly tilting the ring frame utilizes the torque difference between the upper and lower counterweight rings to rotate the upper end of the ring frame downwards until it returns to a vertical position. This allows for switching between the electromagnetic probe and the eddy current probe to inspect pipes of different materials. Simultaneously, an electrical connection end and an electrical connection ring are designed to change the electrical connection state under downward pressure, enabling switching between the electromagnetic probe and the eddy current probe during testing without needing to remove the testing space for replacement, thus improving testing efficiency and accuracy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the detection component in an embodiment of the present invention; Figure 3 This is an exploded view of the detection component in an embodiment of the present invention; Figure 4 This is a schematic diagram of the U-shaped frame in an embodiment of the present invention; Figure 5 This is a schematic diagram of the combined structure of the ring frame and the central support column in an embodiment of the present invention; Figure 6This is a schematic diagram of the central support structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the ring frame structure in an embodiment of the present invention; Figure 8 In this invention Figure 2 Side sectional view; Figure 9 In this invention Figure 2 Another side sectional view; Figure 10 This is a schematic diagram of the structure of the hardened rubber sleeve in an embodiment of the present invention; Figure 11 In this invention Figure 10 Top sectional view; Figure 12 This is a schematic diagram of the clamping component in an embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Organism; 2. Detection components; 21. Annular frame; 22. Electromagnetic probe; 23. Eddy current probe; 24. U-shaped frame; 25. Central support; 26. Data connection cable; 27. Bearing; 28. Counterweight ring; 29. ​​Electrical connection ring; 210. Magnet ring; 211. Limiting ring; 212. Electrical connection end; 213. Limiting spring; 3. Hardened rubber sleeve; 31. Inflation hose; 32. Balloon airbag; 33. One-way valve; 34. Inflation port; 35. Manual deflation valve; 4. Clamping components; 41. Watch strap; 42. Upper support; 43. Clamping plate; 44. Side elastic clamping plate; 45. U-shaped elastic sheet; 46. Abutting elastic sheet; 47. Connecting ring; 48. Connecting block; 49. Connecting groove; 410. Connecting buckle. Detailed Implementation

[0020] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0021] like Figures 1-12As shown, a coating thickness gauge and a multi-frequency eddy current probe adaptive scanner include a body 1, a detection component 2 connected to the body 1, and a hardened rubber sleeve 3 for changing the state of the detection component 2. The detection component 2 includes an annular frame 21 and an electromagnetic probe 22 and an eddy current probe 23 fixedly installed at both ends of the annular frame 21. This allows the device to alternately use the electromagnetic probe 22 and the eddy current probe 23 at both ends of the annular frame 21 during testing. At the same time, the hardened rubber sleeve 3 can change from a soft state to a rigid state when inflated, allowing the operator to control and change the position of the detection component 2 by swinging the rigid hardened rubber sleeve 3 in a confined space. This enables precise testing of a specified location on a pipeline in a confined space.

[0022] See attached document Figures 2-9 To enable the electromagnetic probes 22 and eddy current probes 23 at both ends of the annular frame 21 to stably alternate when needed, the detection assembly 2 also includes a U-shaped frame 24. The U-shaped frame 24 is fitted around both sides of one end of the annular frame 21. The annular frame 21 has an annular groove in its center and a central support column 25 is movably installed therein. The two ends of the central support column 25 are rotatably connected to the U-shaped frame 24 through bearings 27. By fixing the bearings 27 to both ends of the central support column 25 and both sides of the bottom of the U-shaped frame 24, the central support column 25 can rotate around the bottom of the U-shaped frame 24, reducing rotational resistance. This allows the electromagnetic probes 22 and eddy current probes 23 at both ends of the annular frame 21 to rotate and switch around the bottom of the U-shaped frame 24 to detect pipes of different materials when needed.

[0023] Furthermore, the two ends of the annular groove at the center of the annular frame 21 are semi-circular, with the inner diameter being the same as the outer diameter of the central support 25. Simultaneously, the length of the vertical portion in the middle is not less than the diameter of the central support 25. Correspondingly, counterweight rings 28 are fixedly installed at the ends of the electromagnetic probe 22 and the eddy current probe 23 away from the annular frame 21. Therefore, when the U-shaped frame 24 and the annular frame 21, along with the electromagnetic probes 22 and eddy current probes 23 at both ends, are lifted as a whole, and when the central support 25 deviates from the center of gravity of the annular frame 21 and is located at its bottom, the counterweight rings 28 at both ends of the electromagnetic probes 22 and the eddy current probes 23 act... There is a difference in torque on the annular frame 21. The torque generated by the top counterweight ring 28 is greater than that generated by the bottom. As a result, when it is slightly tilted, the top probe will rotate downward around the central support 25 until it reaches the bottom, so that the end with the larger torque is located at the bottom. This completes the alternation of the upper and lower positions of the electromagnetic probe 22 and the eddy current probe 23. When it is inconvenient to remove and replace the probe in a confined space, the two can be quickly rotated and reversed to switch between them. This method can be used to detect pipes made of different materials. The switching is convenient and simple, and the efficiency is higher, thereby improving the detection efficiency.

[0024] See attached document Figures 2-5 To ensure more stable switching between the electromagnetic probe 22 and the eddy current probe 23 at both ends of the annular frame 21, a limiting ring 211 is embedded in the inner wall of the annular frame 21. Correspondingly, a magnetic ring 210 is fitted onto the central support 25. The limiting ring 211 is made of magnetic metal, allowing the central support 25 to be stably attached to one end of the annular frame 21 under magnetic attraction. This stability is maintained even as the annular frame 21 rotates, ensuring that the axis of rotation remains unchanged during the switching process between the electromagnetic probe 22 and the eddy current probe 23. The process is more stable. When the central support 25 is magnetically attracted to the bottom of the annular frame 21 by the magnetic ring 210, when the annular frame 21 tilts slightly, the probe at the top will rotate downward around the central support 25 under the action of the counterweight ring 28. At the same time, the central support 25 is stably attracted to its original position under the action of magnetic attraction. After the probe at the top rotates to the bottom, the central support 25 will be transferred to the top of the annular frame 21. At this time, the torque on the bottom end is large, so there will be no more rotation between the upper and lower ends, thus completing the conversion between the upper and lower probes.

[0025] See attached document Figure 1 , Figure 10 as well as Figure 11 To facilitate easier control of the detection component 2 in confined spaces, a data connection cable 26 for electrical connection with the main body 1 is connected to the U-shaped frame 24. A hardened rubber sleeve 3 is wrapped around the end of the data connection cable 26 near the U-shaped frame 24, with an inflation gap between them. During inflation, gas continuously fills this gap, gradually suspending the hardened rubber sleeve 3 and the data connection cable 26 into a rigid state. This allows the operator to insert the flexible hardened rubber sleeve 3 and the data connection cable 26 into the confined space to reach the designated position. Further inflation then suspends them, allowing the operator to directly control the movement of the detection component 2, similar to using a rod-like device. This enables more precise control of the detection component 2, achieving accurate detection of designated positions without the need for other equipment, making operation more convenient.

[0026] Based on the above structure, when switching between the electromagnetic probe 22 and the eddy current probe 23 for detection in a confined space (assuming the electromagnetic probe 22 is located at the bottom for detection), since the probe needs to contact the pipe, the hardened rubber sleeve 3 in its rigid state and the data connection cable 26 are used to vertically press the electromagnetic probe 22 against the pipe surface. At this time, under the action of downward pressure, the central support 25 will slide to the lowest end of the annular frame 21 and be magnetically attracted there by the magnetic ring 210. Then, when the operator needs to switch probes, they only need to lift the entire detection assembly 2 and tilt it slightly in any direction. At this time, the eddy current probe 23 located at the top will directly rotate downward around the central support 25 under the action of the weight ring 28. At the same time, the central support 25 is stably attracted to its original position under the action of magnetic attraction. In this way, the eddy current probe 23 will rotate downward around the central support 25 under the action of the weight ring 28. After probe 23 rotates to the bottom, the central support 25 will move to the top of the annular frame 21. At this time, the torque on the bottom end is large, so there will be no more rotation between the upper and lower ends. This completes the switch between the upper and lower probes. When testing again, the eddy current probe 23 needs to be pressed against the pipe surface again. Under the action of the pushing force, the central support 25 will slide to the lowest end of the annular frame 21 again, thereby realizing the switch of the center of gravity. In this way, when the operator lifts the detection component 2 again, the switch between the electromagnetic probe 22 and the eddy current probe 23 can be completed again. This allows for convenient and efficient switching between the two during use, following the work process. When working in confined spaces, there is no need to remove and replace the probe before inserting it, which greatly improves the detection efficiency and makes it more convenient for the operator to control, thus improving the detection accuracy.

[0027] For further details, please refer to the appendix. Figure 7 To make the central support 25 move more efficiently within the annular frame 21 and to ensure more stable adhesion at both ends, the two semicircular ends of the limiting ring 211 are made of magnetic material, while the rest is made of non-magnetic material. At the same time, the outer diameter of the magnetic ring 210 is the same as the maximum outer diameter of the central support 25. Thus, when the central support 25 moves to both ends within the annular frame 21, it will be affected by the magnetic attraction at both ends, enabling it to move quickly to both ends and adhere to them, without moving to the middle of the annular frame 21, making it easier to change its state.

[0028] See attached document Figures 2-5To switch the electrical connection for data transmission during the switching process between the electromagnetic probe 22 and the eddy current probe 23, an annular groove is provided in the middle of the central support 25, and an electrical connection ring 29 is embedded in the groove. The electrical connection ring 29 and the data connection line 26 are electrically connected via a wire hidden within the U-shaped frame 24 and the central support 25. Simultaneously, both the electromagnetic probe 22 and the eddy current probe 23 have an electrical connection end 212 slidably embedded at the end near the annular frame 21, connected to the electrical connection ring 29. A limiting spring 213 is installed on the end 212 to limit its position. When the central support 25 is attracted to one end by the magnetic attraction of the magnet ring 210, the electrical connection end 212 will be embedded in the electrical connection ring 29 to realize electrical connection and data transmission with the probe at that end. At the same time, the limiting spring 213 will be compressed under the action of contact pressure. Then, the rebound force of the limiting spring 213 will make the electrical connection end 212 stably abut against the inside of the electrical connection ring 29, so that the connection will not be broken, thus ensuring the stability of the electrical connection.

[0029] It should be noted that the electromagnetic probe 22 is equipped with a support frame, an electromagnetic core, an electromagnetic induction coil, and an electromagnetic circuit board. The electrical connection terminal 212 is electrically connected to the electromagnetic circuit board to complete data and current transmission. Similarly, the eddy current probe 23 is also equipped with a support frame, an eddy current magnetic core, an eddy current induction coil, and an eddy current circuit board. Another electrical connection terminal 212 is electrically connected to the eddy current circuit board to complete data and current transmission. Thus, during the switching between the two, the transmission of current and data can be guaranteed in real time, ensuring a stable connection with the body 1 for detection.

[0030] Furthermore, to ensure that the electrical connection end 212 and the electrical connection ring 29 do not affect the rotation of the central support 25, the exposed end of the electrical connection end 212 is hemispherical, and the cross-section of the electrical connection ring 29 is semi-circular. The inner diameter of the annular groove on the electrical connection ring 29 is the same as the radius of the exposed end of the electrical connection end 212. This allows the electrical connection end 212 to rotate synchronously inside the electrical connection ring 29 when the central support 25 rotates, thus preventing them from interfering with each other. In this embodiment, two magnet rings 210 are symmetrically arranged on both sides of the electrical connection ring 29, making the magnetic attraction force more uniform and maintaining balance at both ends, thereby ensuring the adsorption and rotational stability of the central support 25 at both ends of the U-shaped frame 24.

[0031] See attached document Figure 10 and Figure 11In order to allow for the inflation and deflation of the air gap between the hardened rubber sleeve 3 and the data connection cable 26 as needed (i.e., switching between a rigid state), this embodiment is provided with a spherical airbag 32 (hand-held type), which is located at the inflation end of the hardened rubber sleeve 3. The top of the spherical airbag 32 is provided with an inflation port 34, and an inflation hose 31 connected to the hardened rubber sleeve 3 is connected to the inflation port 34. This allows the operator to continuously squeeze the spherical airbag 32 with their hand, so that air can be injected into the gap between the hardened rubber sleeve 3 and the data connection cable 26 through the inflation hose 31, thereby using air pressure to convert it into a rigid state.

[0032] Furthermore, a one-way valve 33 is provided on one side of the top of the spherical airbag 32 for supplying gas to the spherical airbag 32. When the spherical airbag 32 returns to its original shape, gas is drawn into it through the one-way valve 33. Then, when squeezed by the palm, the gas is discharged from the inflation port 34 and enters the inflation gap between the hardened rubber sleeve 3 and the data connection cable 26 through the inflation hose 31. The spherical airbag 32 is continuously squeezed until the hardened rubber sleeve 3 and the data connection cable 26 gradually become rigid. Secondly, after use, a manual exhaust valve 35 is installed at the top of the spherical airbag 32. By pressing the manual exhaust valve 35 with a finger, the air between the inflation hose 31 and the hardened rubber sleeve 3 can be expelled, thus making it soft and easy to remove from confined testing spaces, making operation more convenient for staff.

[0033] It should be noted that the hardened sleeve 3 includes an inner membrane and an outer membrane, as well as a braided layer between them. The inner and outer membranes are double-layered membranes made of PVC / PBO composite material or PVC / PVDF composite material. In this embodiment, PVC / PBO composite material is selected, which can improve the elastic deformation capability and weather resistance of the hardened sleeve 3. At the same time, its surface is coated with an aerogel coating to form a protective layer to ensure airtightness and prevent air leakage. Meanwhile, the braided layer is made of polyester filament, acrylic filament, or glass fiber filament interwoven into single-strand warp threads (polyester filament is used in this embodiment), and arranged in parallel between the inner and outer membranes. After inflation, the gas pressure straightens the warp threads, and the mesh structure is transformed into a rigid skeleton. The membrane expands into a stable cylindrical pipe, allowing the operator to control the detection component 2 through the data connection line 26 in the rigid state of the hardened sleeve 3, and move it to the required position as needed. Then, one of the electromagnetic probe 22 and the eddy current probe 23 is placed against the pipe surface to detect it. This makes the device easier to operate in a confined space, and does not require auxiliary equipment, thereby improving the convenience and efficiency of detection.

[0034] Furthermore, the inflatable hose 31 has a semi-circular cross-section and wraps around the outer surface of the data connection cable 26. At the same time, the inflatable hose 31 extends to the end of the data connection cable 26 that is inserted into the body 1, so that the data connection cable 26 and the inflatable hose 31 are integrated. Thus, when the operator pulls the control data connection cable 26, the two can be controlled simultaneously, making the device more convenient to use.

[0035] See attached document Figure 1 and Figure 12 To enable a single operator to operate the device, this embodiment also includes a clamping assembly 4, which comprises a wristband 41 and an upper support 42 detachably connected to the wristband 41. A clamping plate 43 is fixedly mounted on the top surface of the upper support 42, and both ends of the clamping plate 43 are integrally formed with symmetrical, figure-eight-shaped side elastic clamping plates 44. By providing U-shaped elastic pieces 45 for bending deformation at the bends between the side elastic clamping plates 44 and the clamping plate 43, and by providing abutment elastic pieces 46 at the top of the side elastic clamping plates 44 that abut against the side of the machine body 1, the machine body 1 can be clamped by the lateral deformation of the side elastic clamping plates 44. Between the two, the device is held and stabilized by the rebound force. At the same time, the device is worn on the wrist by the strap 41, and the clamping plate 43 is parallel to the arm, so that the clamped body 1 is perpendicular to the wrist. Its size is not large and its width is limited, so it will not affect the movement of the wrist and palm. This allows the hand holding the body 1 to also hold the spherical airbag 32 placed next to it. This ensures that the staff can operate the spherical airbag 32 in real time with one hand and observe the data on the body 1 at the same time, while the other hand stably controls the detection component 2 for detection. This allows one person to complete the entire detection work without the cooperation of other staff, reducing labor requirements.

[0036] It should be noted that the upper support 42 has connecting grooves 49 on both sides near the watch strap 41. At the same time, the end of the watch strap 41 near the upper support 42 is rotatably connected to a connecting ring 47, and a connecting block 48 embedded in the connecting groove 49 is fixedly installed on the connecting ring 47, making it detachable so that the watch strap 41 can be replaced when it is damaged. In addition, the opposite ends of the two sets of watch straps 41 are provided with connecting buckles 410 and matching connecting holes, so that the wearing length of the watch strap 41 can be adjusted according to the thickness of the staff's arms to fit different staff.

[0037] The working principle of this invention is as follows: When in use, first wear the clamping component 4 on your wrist through the watch strap 41, then clamp the body 1 between the side elastic plates 44, and use the hand in this position to hold the spherical airbag 32. Then, use the other hand to control the position of the detection component 2 through the hardened rubber sleeve 3 and the data connection cable 26, insert it into the narrow detection space, and move it roughly to the desired position.

[0038] Secondly, the spherical airbag 32 is continuously squeezed to fill the gap between the hardened rubber sleeve 3 and the data connection line 26 through the inflation hose 31 until it is converted into a rigid state by air pressure. At this time, the detection component 2 can be precisely controlled by the hardened rubber sleeve 3 and the data connection line 26 in the rigid state, and it can be precisely moved to the position to be detected. Then, the detection component 2 is pushed down so that one of the probes touches the surface of the pipe for detection.

[0039] Finally, when probe switching is required, simply lift the entire detection assembly 2 and tilt it slightly in any direction. The eddy current probe 23 at the top will then rotate downwards around the central support 25 under the weight of the counterweight ring 28. Simultaneously, the central support 25 will be stably held in its original position by magnetic attraction. After the eddy current probe 23 rotates to the bottom, the central support 25 will then be positioned at the top of the ring frame 21. At this point, the torque at the bottom is greater, preventing further rotation between the upper and lower ends. This completes the switching between the upper and lower probes. When testing again... The eddy current probe 23 needs to be pressed against the pipe surface again. Under the action of the pushing force, the central support 25 will slide to the lowest end of the annular frame 21 again, thereby realizing the switching of the center of gravity. In this way, when the operator lifts the detection component 2 again, the switching between the electromagnetic probe 22 and the eddy current probe 23 can be completed again until the detection is completed. Then, the air between the air hose 31 and the hardened rubber sleeve 3 can be discharged by pressing the manual exhaust valve 35 with a finger, thereby changing it to a soft state, making it easy to take out from the narrow detection space, making the operation more convenient and efficient for the operator, and the detection more accurate.

[0040] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A coating thickness gauge and a multi-frequency eddy current probe adaptive scanner, characterized in that, include: Body (1); The detection component (2) includes an annular frame (21) and an electromagnetic probe (22) and an eddy current probe (23) fixedly installed at both ends of the annular frame (21). The annular frame (21) has an annular through groove in the center and a central support column (25) is movably installed in it. The two sides of the annular frame (21) are fitted with U-shaped frames (24) that are rotatably connected to the central support column (25), so that the electromagnetic probe (22) and the eddy current probe (23) can rotate upside down under their own gravity within the U-shaped frame (24). A magnetic attraction mechanism is provided between the annular frame (21) and the central support column (25) for maintaining the central support column (25) at one end of the annular frame (21); The U-shaped frame (24) is connected to a data connection line (26) for electrical connection with the body (1). A hardened rubber sleeve (3) is wrapped around one end of the data connection line (26) near the U-shaped frame (24), and an inflation gap is provided between the two to convert the data connection line (26) into a rigid state when inflated.

2. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 1, characterized in that: The magnetic attraction mechanism includes a limiting ring (211) embedded in the inner wall of the annular frame (21) and a magnet ring (210) sleeved on the central support (25). The two semicircular ends of the limiting ring (211) are made of magnetic material, while the rest is made of non-magnetic material. The outer diameter of the magnet ring (210) is the same as the maximum outer diameter of the central support (25).

3. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 1, characterized in that: The central support column (25) has bearings (27) fixedly connected to both ends of the U-shaped frame (24) and embedded in the bottom end. Both the electromagnetic probe (22) and the eddy current probe (23) are fixedly mounted with a counterweight ring (28) at the end away from the annular frame (21), so that the two rotate and reverse around the central support (25) under the torque difference of the counterweight ring (28).

4. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 1, characterized in that: The central support (25) has an annular groove in the middle, and an electrical connection ring (29) is embedded in the groove. The electrical connection ring (29) is electrically connected to the data connection line (26). Both the electromagnetic probe (22) and the eddy current probe (23) have an electrical connection end (212) slidably embedded at one end near the annular frame (21) that is connected to the electrical connection ring (29). The electrical connection end (212) is equipped with a limiting spring (213) for limiting its position so that it abuts against the inside of the electrical connection ring (29).

5. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 4, characterized in that: The exposed end of the electrical connection head (212) is hemispherical, the cross-section of the electrical connection ring (29) is semi-circular, and the inner diameter of the annular groove on the electrical connection ring (29) is the same as the radius of the exposed end of the electrical connection head (212).

6. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 1, characterized in that: The hardened rubber sleeve (3) includes an inner membrane, an outer membrane, and a braided layer between them; The inner membrane and the outer membrane are a double-layer membrane body composed of a PVC / PBO composite material or a PVC / PVDF composite material, and a protective layer is formed by coating an aerogel coating on the surface; The braided layer is woven into a single-strand warp with polyester filaments, acrylic filaments or fiberglass filaments, and is arranged parallel between the inner and outer membranes, so that after inflation, the warp is straightened by gas pressure to convert the data connection line (26) into a rigid state.

7. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 1, characterized in that: A spherical airbag (32) is arranged at the inflation end of the hardened rubber sleeve (3); An inflation port (34) is arranged at the top of the spherical airbag (32), and an inflation hose (31) connected to the hardened rubber sleeve (3) is connected to the inflation port (34) to fill air into the gap between the hardened rubber sleeve (3) and the data connection line (26); A one-way air valve (33) for supplying gas to the spherical airbag (32) is arranged on one side at the top of the spherical airbag (32); A manual exhaust valve (35) for discharging the air between the inflation hose (31) and the hardened rubber sleeve (3) is installed at the top end of the spherical airbag (32).

8. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 7, characterized in that: The cross-section of the inflation hose (31) is semicircular and wraps around the outer surface of the data connection line (26); The inflation hose (31) extends to one end of the data connection line (26) inserted into the body (1).

9. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 8, characterized in that: It further includes a clamping component (4) for clamping and placing the body (1), which includes a watchband (41) worn on the wrist and an upper support (42) detachably connected to the watchband (41); A clamping plate (43) is fixedly installed on the top surface of the upper support (42), and symmetric "eight”-shaped side elastic clamping plates (44) are integrally formed at both ends of the clamping plate (43); A U-shaped elastic sheet (45) for bending deformation is arranged at the bending part of the side elastic clamping plate (44) and the clamping plate (43); A contact elastic sheet (46) that contacts the side surface of the body (1) is arranged at the top end of the side elastic clamping plate (44).

10. The coating thickness gauge and multi-frequency eddy current probe adaptive scanner according to claim 9, characterized in that: Connection grooves (49) are opened on both sides of the upper support (42) close to the watchband (41); A connection ring (47) is rotatably connected to one end of the watchband (41) close to the upper support (42), and a connection block (48) embedded in the connection groove (49) is fixedly installed on the connection ring (47); Connection buttons (410) and matching connection holes are arranged at the opposite ends of the two watchbands (41).

Images