Eddy current probe

Abstract

The utility model discloses an eddy current probe, which relates to the technical field of eddy current probes and comprises a probe body, the outer side of the probe body is movably connected with a movable block, the other end of a connecting rod is fixedly connected with a fixing ring, and the inner side of a protective shell is connected with a protective film in a buckling manner. First movable grooves used in cooperation with the first springs and the connecting rods are formed in the inner sides of the fixing blocks. According to the utility model, the protective shell is pushed upwards, or the bottom of the protective shell is in contact with the outer surface of an object to be detected and the probe body is held to extrude downwards, so that the eddy current probe possibly encounters an obstacle or an irregular surface through relative motion of force, and the protective shell can stop or adjust the position in time before the probe is in contact with the object; the probe body can be protected against dust and water through the protective film, external impurities are effectively prevented from entering the probe body, sensitive elements and circuits of the probe body can be protected against damage, and the practicability and flexibility of the whole eddy current probe are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of eddy current probes, and particularly to an eddy current probe. Background Art

[0002] An eddy current probe is a non-contact sensor probe based on the principle of eddy current effect. It is mainly used to test the defects on the surface of conductors and detect damages and cracks in materials.

[0003] Inside the eddy current probe, there is a measuring coil, which is powered by a high-frequency oscillator to generate a high-frequency magnetic field. When the magnetic lines of force of the measuring coil radiate outward from the surface of the sensor housing, eddy currents will be induced on the surface of the metal workpiece to be measured opposite the sensor. The magnitude of these eddy currents is related to the gap between the workpiece to be measured and the measuring coil, and is also closely related to the physical properties (such as cracks, defects, etc.) of the surface of the workpiece to be measured. The eddy current probe can perform detection without contacting the surface of the workpiece to be measured, avoiding the wear and pollution that may be caused by traditional contact detection. The eddy current probe can quickly and accurately detect the defects and damages on the surface of the conductor, providing strong guarantee for the production of the manufacturing industry.

[0004] Eddy current probes are widely used in the manufacturing industry, especially in fields such as automobile manufacturing, aerospace, mechanical manufacturing, and rail transit. In automobile manufacturing, it is used to detect the surface quality of parts; in the aerospace field, it is used for the manufacturing and maintenance of heavy equipment such as airplanes and rockets; in mechanical manufacturing, it can detect crack defects on the surfaces of various mechanical parts; in the rail transit field, it is used to detect the catenary of electrified railway lines.

[0005] However, the eddy current probes in the prior art are directly exposed outside. Eddy current probes are usually relatively precise, and their surfaces and internal structures are easily affected by external physical factors such as collision and scratching. Moreover, during the use of the eddy current probe, the position is constantly adjusted to obtain more accurate measurement values. However, frequent adjustment of the detection distance may cause damage to the eddy current probe, making it inconvenient during use. Summary of the Utility Model

[0006] Based on this, the purpose of the present utility model is to provide an eddy current probe to solve the technical problem that the eddy current probes in the prior art are directly exposed outside, and eddy current probes are usually relatively precise, easily affected by collision and scratching, and frequent adjustment of the detection distance during detection may cause damage to the eddy current probe.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an eddy current probe, comprising a probe body, the internal structure of the probe body mainly comprising an eddy current coil, a probe shell, a printed circuit board, a power indicator light, a threshold indicator light, an output shielded cable, and a cable plug, a movable block is movably connected to the outside of the probe body, a protective shell used in conjunction with the probe body is fixedly connected to the outside of the movable block, a fixed block is fixedly installed on the outside of the probe body, a plurality of groups of connecting rods are movably installed in the fixed block, a first spring is fixedly connected between one end of the connecting rod and the fixed block, a fixing ring is fixedly connected to the other end of the connecting rod, a protective film is snap-connected to the inside of the protective shell, a plurality of groups of limit blocks used in conjunction with the fixing ring are fixedly installed on the inside of the bottom of the protective shell, and a first movable groove used in conjunction with the first spring and the connecting rod is opened on the inside of the fixed block.

[0008] By adopting the above technical solution, when in use, the protective shell is pushed upward, or the bottom of the protective shell is brought into contact with the outer surface of the object to be measured and the probe body is held and squeezed downward. Through the relative movement of force, when the protective shell moves upward or the probe body is squeezed downward, the connecting rod and the fixing ring will both contact and relatively squeeze the protective film. The protective film is made of plastic, so the protective film will be stretched open by the fixing ring until the probe body can pass through the protective film. At the same time, the position of the probe body can be adjusted according to actual use. If the probe body needs to fit with the object to be measured, the probe body is continued to be squeezed downward until the fixing ring contacts the limit block. The resistance of the limit block to the fixing ring is greater than the resistance of the protective film to the fixing ring. Therefore Through the mutual cooperation between the first spring, the connecting rod and the first movable groove, the connecting rod can be retracted into the fixed block. At this time, the fixing ring will move from the bottom of the probe body to the outside of the probe body, and then the probe body can completely fit the object to be measured. This structure is conducive to solving the problem that in the current probe body detection process, the eddy current probe may encounter obstacles or irregular surfaces, and the protective shell can stop or adjust the position in time before the probe contacts these objects, thereby avoiding collision and damage. The protective film can make the probe body dustproof and waterproof, effectively preventing external impurities from entering the interior of the probe body, and protecting the sensitive components and circuits of the probe body from damage, thereby improving the practicality and flexibility of the entire eddy current probe.

[0009] The utility model is further configured that a clamping block used in conjunction with the movable block is movably arranged on the outer side of the probe body in a symmetrical structure, and an unlocking block used in conjunction with the clamping block is arranged on the outer side of the movable block.

[0010] By adopting the above technical solution, the arranged clamping block and unlocking block are beneficial for the staff to use the probe body to work. The protective shell can move upward and achieve the self-locking effect, enabling the probe body to work normally. After the detection of the probe body is completed, the movable block can be unlocked through the unlocking block, and the movable block and the protective shell are reset to the initial position to protect the eddy current probe.

[0011] The present utility model is further arranged such that the unlocking block is made of soft rubber material, a second spring is fixedly connected inside the unlocking block, and one end of the second spring is fixedly connected with a ejector pin for cooperating with the clamping block.

[0012] By adopting the above technical solution, when the unlocking block is made of soft rubber material, it has a certain deformation effect, enabling the second spring and the ejector pin to better cooperate and exert an extrusion effect on the clamping block, thereby achieving the unlocking effect.

[0013] The present utility model is further arranged such that a second movable groove for cooperating with the clamping block is formed inside the movable block, the ejector pin can move inside the second movable groove, and the outer side of the clamping block is of a hemispherical structure.

[0014] By adopting the above technical solution, the arranged second movable groove enables the clamping block with a hemispherical structure to be clamped into the second movable groove to achieve the self-locking effect. When unlocking is required, the clamping block is extruded by the ejector pin until the clamping block retracts to the inner side of the probe body, and then the protective shell can be reset to continue protecting the probe body.

[0015] The present utility model is further arranged such that a plurality of convex blocks are fixedly installed inside the movable block, and a sliding groove for cooperating with the convex blocks is formed on the outer side of the probe body.

[0016] By adopting the above technical solution, the mutual cooperation between the arranged convex blocks and the sliding groove is beneficial for the staff to bring the bottom surface of the protective shell into contact with the object to be measured and press downward, enabling the movable block and the protective shell to move upward flexibly until the probe body fits against the outer surface of the object to be measured.

[0017] The present utility model is further arranged such that a protective ring is fixedly installed on the outer side of the bottom of the protective shell, the protective ring is made of rubber material, and the limiting block is located below the fixed ring.

[0018] By adopting the above technical solution, when the arranged protective ring is made of a rubber ring, it is beneficial for placing the probe body, either lying flat or vertically, and can provide protective support for the eddy current probe. Secondly, during work, the protective ring can assist the staff to more easily detect the object to be measured.

[0019] The present utility model is further configured such that a connecting ring is fixedly connected to the outer side of the protective film, a clamping groove for cooperating with the connecting ring is formed in the protective shell, the protective film is made of four groups of hard film sheets, and the inner diameter of the fixing ring is larger than the outer diameter of the probe body.

[0020] By adopting the above technical solution, the mutual cooperation between the provided clamping groove and the connecting ring is beneficial to fixing the protective film in the protective shell to play a role in protecting the probe body. When the protective film is made of four groups of hard film sheets, it is beneficial to cooperate with the fixing ring to open the protective film, so that the probe body can pass through the protective film for use during operation. And when the inner diameter of the fixing ring is larger than the outer diameter of the probe body, the probe body can flexibly pass through the fixing ring, which is beneficial to making the probe body fully fit with the object to be measured during detection.

[0021] In summary, the present utility model mainly has the following beneficial effects:

[0022] 1. The present utility model can adjust the position of the probe body according to the actual use situation. If the probe body needs to be fitted with the object to be measured, the probe body is further pressed downward until the fixing ring contacts the limit block. The resistance of the limit block to the fixing ring is greater than the resistance of the protective film to the fixing ring. Therefore, through the mutual cooperation of the first spring, the connecting rod and the first movable groove, the connecting rod can be retracted into the fixing block. At this time, the fixing ring will move from below the probe body to the outside of the probe body, and then the probe body can be fully fitted with the object to be measured. With this structure, it is beneficial to solve the problem that during the detection process of the current probe body, the eddy current probe may encounter obstacles or irregular surfaces, and the protective shell can stop or adjust the position in time before the probe contacts these objects, thereby avoiding collision and damage. The protective film can play a role in dust and water protection for the probe body, effectively preventing external impurities from entering the inside of the probe body, protecting the sensitive components and circuits of the probe body from damage, and improving the practicability and flexibility of the entire eddy current probe;

[0023] 2. The mutual cooperation between the provided clamping groove and the connecting ring in the present utility model is beneficial to fixing the protective film in the protective shell to play a role in protecting the probe body. When the protective film is made of four groups of hard film sheets, it is beneficial to cooperate with the fixing ring to open the protective film, so that the probe body can pass through the protective film for use during operation. And when the inner diameter of the fixing ring is larger than the outer diameter of the probe body, the probe body can flexibly pass through the fixing ring, which is beneficial to making the probe body fully fit with the object to be measured during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a first perspective schematic view of the overall structure of the present utility model;

[0025] Figure 2 is a second perspective schematic view of the overall structure of the present utility model;

[0026] Figure 3 is a schematic cross-sectional structure diagram of the present utility model;

[0027] Figure 4 is a schematic diagram of the first perspective of the disassembled structure of the present utility model;

[0028] Figure 5 is a schematic diagram of the second perspective of the disassembled structure of the present utility model.

[0029] In the figure: 1, probe body; 2, protective shell; 3, protective ring; 4, limit block; 5, protective film; 6, chute; 7, clamping block; 8, movable block; 9, convex block; 10, unlocking block; 11, fixed block; 12, first spring; 13, connecting rod; 14, first movable groove; 15, fixed ring; 16, connecting ring; 17, card slot; 18, second movable groove; 19, second spring; 20, ejector pin. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0031] The internal structure of the probe body mainly includes an eddy current coil, a probe housing, a position adjustment thread, a printed circuit board, a power indicator light, a threshold indicator light, an output shielded cable, and a cable plug. Through the mutual cooperation between the eddy current coil, the probe housing, the printed circuit board, the power indicator light, the threshold indicator light, the output shielded cable, and the cable plug, the eddy current coil generates and induces an electromagnetic field, and each electronic component is connected and adjusted through the printed circuit board to ensure the accurate transmission and processing of signals. Then, visual feedback is provided through the power indicator light and the threshold indicator light to help the staff understand the working state of the probe body and whether the preset threshold is reached. Finally, the output shielded cable and the cable plug are cooperated to transmit the signal of the probe to the data processing unit to ensure the integrity and anti-interference of the signal. The combination of these components enables the eddy current probe to accurately measure and monitor physical quantities such as the position and vibration of an object.

[0032] Next, the embodiments of the present utility model will be described according to its overall structure.

[0033] An eddy current probe, as Figures 1-5As shown, it includes a probe body 1, a movable block 8 is movably connected to the outer side of the probe body 1, a protective shell 2 used in conjunction with the probe body 1 is fixedly connected to the outer side of the movable block 8, a fixed block 11 is fixedly installed on the outer side of the probe body 1, multiple groups of connecting rods 13 are movably installed in the fixed block 11, a first spring 12 is fixedly connected between one end of the connecting rod 13 and the fixed block 11, and a fixing ring 15 is fixedly connected to the other end of the connecting rod 13, a protective film 5 is snap-connected to the inner side of the protective shell 2, multiple groups of limit blocks 4 used in conjunction with the fixing ring 15 are fixedly installed on the inner side of the bottom of the protective shell 2, and a first movable groove 14 used in conjunction with the first spring 12 and the connecting rod 13 is opened on the inner side of the fixed block 11.

[0034] When in use, push the protective shell 2 upward, or make the bottom of the protective shell 2 contact with the outer surface of the object to be measured and hold the probe body 1 to squeeze downward. Through the relative movement of force, when the protective shell 2 moves upward or the probe body 1 is squeezed downward, the connecting rod 13 and the fixing ring 15 will contact and relatively squeeze the protective film 5. The protective film 5 is made of plastic, so the protective film 5 will be stretched open by the fixing ring 15 until the probe body 1 can pass through the protective film 5. At the same time, the position of the probe body 1 can be adjusted according to actual use. If the probe body 1 needs to fit the object to be measured, the probe body 1 continues to be squeezed downward until the fixing ring 15 contacts the limit block 4. The resistance of the limit block 4 to the fixing ring 15 is greater than the resistance of the protective film 5 to the fixing ring 15. The mutual cooperation between the first spring 12, the connecting rod 13 and the first movable groove 14 can retract the connecting rod 13 into the fixed block 11. At this time, the fixing ring 15 will move from the bottom of the probe body 1 to the outside of the probe body 1, and then the probe body 1 can completely fit the object to be measured. This structure is conducive to solving the problem that during the current detection process of the probe body 1, the eddy current probe may encounter obstacles or irregular surfaces, and the protective shell 2 can stop or adjust the position in time before the probe contacts these objects, thereby avoiding collision and damage. The protective film 5 can achieve the effect of dustproof and waterproof for the probe body 1, effectively preventing external impurities from entering the interior of the probe body 1, and protecting the sensitive components and circuits of the probe body 1 from damage, thereby improving the practicality and flexibility of the entire eddy current probe.

[0035] Furthermore, the setting of the locking block 7 and the unlocking block 10 facilitates the protective shell 2 to move upward and achieve a self-locking effect when the staff uses the probe body 1 to work, so that the probe body 1 can work normally. After the detection of the probe body 1 is completed, the movable block 8 can be unlocked through the unlocking block 10, so that the movable block 8 and the protective shell 2 are reset to the initial position to protect the eddy current probe. When the unlocking block 10 is made of soft rubber material, it has a certain deformation effect, so that the second spring 19 and the top column 20 can better cooperate, and the locking block 7 is squeezed, thereby achieving the unlocking effect.

[0036] In this embodiment, the second movable slot 18 is provided to enable the hemispherical structure of the clamping block 7 to be clamped into the second movable slot 18 to achieve the effect of self-locking. When unlocking is required, the clamping block 7 is squeezed by the ejector pin 20 until the clamping block 7 retracts inside the probe body 1, so that the protective shell 2 can be reset and continue to protect the probe body 1. The mutual cooperation between the convex block 9 and the sliding slot 6 is beneficial for the staff to make the bottom surface of the protective shell 2 contact the object to be measured and squeeze downward, so that the movable block 8 and the protective shell 2 can move upward flexibly until the probe body 1 fits against the outer surface of the object to be measured. When the protective ring 3 is made of a rubber ring, it is beneficial for placing the probe body 1, either lying flat or vertically, which can play a role in protecting and supporting the eddy current probe. Secondly, during operation, the protective ring 3 can assist the staff to more easily detect the object to be measured. Finally, the mutual cooperation between the clamping slot 17 and the connecting ring 16 is beneficial for fixing the protective film 5 inside the protective shell 2 to protect the probe body 1. When the protective film 5 is made of four groups of hard film sheets, it is beneficial to cooperate with the fixing ring 15 to open the protective film 5 so that the probe body 1 can pass through the protective film 5 during operation. When the inner diameter of the fixing ring 15 is larger than the outer diameter of the probe body 1, the probe body 1 can flexibly pass through the fixing ring 15, which is beneficial for the probe body 1 to be completely attached to the object to be measured during detection.

[0037] Although the embodiments of the present invention have been shown and described, this specific embodiment is only an explanation of the present invention and not a limitation thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not make creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An eddy current probe, comprising a probe body (1), characterized in that: A movable block (8) is movably connected to the outside of the probe body (1). A protective shell (2) used in cooperation with the probe body (1) is fixedly connected to the outside of the movable block (8). A fixed block (11) is fixedly installed on the outside of the probe body (1). A plurality of connecting rods (13) are movably installed in the fixed block (11). A first spring (12) is fixedly connected between one end of the connecting rod (13) and the fixed block (11). The other end of the connecting rod (13) is fixedly connected to a fixed ring (15). A protective film (5) is snap-connected to the inner side of the protective shell (2). A plurality of limit blocks (4) used in cooperation with the fixed ring (15) are fixedly installed on the inner side of the bottom of the protective shell (2). A first movable groove (14) used in cooperation with the first spring (12) and the connecting rod (13) is formed in the inner side of the fixed block (11).

2. The eddy current probe according to claim 1, wherein: On the outside of the probe body (1), a clamping block (7) used in cooperation with the movable block (8) is movably arranged in a symmetric structure. An unlocking block (10) used in cooperation with the clamping block (7) is arranged on the outside of the movable block (8).

3. The eddy current probe according to claim 2, characterized in that: The unlocking block (10) is made of soft rubber material. A second spring (19) is fixedly connected inside the unlocking block (10). One end of the second spring (19) is fixedly connected to a ejector pin (20) used in cooperation with the clamping block (7).

4. The eddy current probe according to claim 3, wherein: A second movable groove (18) used in cooperation with the clamping block (7) is formed in the movable block (8). The ejector pin (20) can move in the second movable groove (18). The outside of the clamping block (7) is of a hemispherical structure.

5. The eddy current probe according to claim 1, wherein: A plurality of convex blocks (9) are fixedly installed on the inner side of the movable block (8). A sliding groove (6) used in cooperation with the convex blocks (9) is formed on the outside of the probe body (1).

6. The eddy current probe according to claim 1, characterized in that: A protective ring (3) is fixedly installed on the outside of the bottom of the protective shell (2). The protective ring (3) is made of rubber material. The limit block (4) is located below the fixed ring (15).

7. The eddy current probe according to claim 1, wherein: A connecting ring (16) is fixedly connected to the outside of the protective film (5). A clamping groove (17) used in cooperation with the connecting ring (16) is formed in the protective shell (2). The protective film (5) is made of four groups of hard film sheets. The inner diameter of the fixed ring (15) is larger than the outer diameter of the probe body (1).

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