Special eddy current sensor probe for gap detection

Abstract

The utility model discloses a special eddy current sensor probe for gap detection, which relates to the technical field of sensors and comprises a support plate, two corresponding surfaces of the support plate are respectively provided with a measuring coil and a shielding piece, and the shielding pieces are arranged between the measuring coils and the support plate; supporting rods which are symmetrically arranged are arranged on the two sides of the measuring coil; in the supporting state, the maximum distance between the opposite faces of the supporting rod and the supporting plate is larger than the maximum distance between the opposite faces of the measuring coil and the supporting plate. When the support rod stretches into the gap, the side edge of the support rod is provided with a driving mechanism for guiding the support rod to move relative to the measuring coil along the measuring direction of the probe; the driving mechanism can drive the supporting rod to move to the position between the measuring coil and the shielding piece. The measuring coil can be prevented from being contacted with the clearance surface, and the detection precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field, concretely is a kind of gap detection special eddy current sensor probe. BACKGROUND

[0002] In the assembly process of equipment, the gap detection problem of two planes is often encountered;Among them, the eddy current sensor is widely used in the gap detection between metal material planes due to the advantages of non-contact measurement, fast response speed, strong environmental adaptability and the like.

[0003] As the utility model patent with publication number CN217541802U proposes an eddy current sensor, which detects the gap width through two measurement coils arranged on the opposite side walls of the support plate. However, the gap to be detected in industrial scenarios is often narrow, and the sensor probe needs to be inserted into the narrow gap to ensure effective coupling of the measurement coil with the two side planes. Moreover, due to the limited operating space and detection process, the probe usually needs to be operated by the staff, and after being inserted into the gap, it is easy to shake due to hand tremor, friction of the inner wall of the gap, and other factors. This shaking can cause unintended contact between the measurement coil and the gap side wall, which not only may cause physical damage to the coil, but also can disrupt the stable distribution of the eddy current field, causing the measurement signal to drift and affecting the accuracy of the measurement data. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of gap detection special eddy current sensor probe to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of gap detection special eddy current sensor probe, including support plate, the support plate two corresponding faces are all installed with measurement coil and shielding piece, the shielding piece is set between measurement coil and support plate;The measurement coil both sides are provided with the support rod that is arranged symmetrically;

[0006] In the supporting state, the maximum distance between the support rod and the opposite surface of the support plate is greater than the maximum distance between the measurement coil and the opposite surface of the support plate;

[0007] When exploring the gap, the side edge of the support rod is provided with a driving mechanism for guiding its movement relative to the measurement coil along the measurement direction of the probe;The driving mechanism can drive the support rod to move between the measurement coil and the shielding piece.

[0008] As a further scheme of the utility model, the driving mechanism includes a sliding block, a connecting rod, a traction rope and a driving piece; the sliding block is in sliding connection with the support plate; an elastic piece for resetting the sliding block is installed on the sliding block; the connecting rod is hingedly connected with the sliding block and the support rod at two ends respectively and is used for converting the movement of the sliding block into the movement of the support rod; one end of the traction rope is fixed with the sliding block and the other end extends to the outside of the support plate; the driving piece is used for driving the one end of the traction rope on the outside of the support plate to move to the side away from the support plate.

[0009] As a further scheme of the utility model, the elastic piece includes a spring, and the spring is connected with the sliding block and the support plate at two ends respectively.

[0010] As a further scheme of the utility model, the driving piece includes a linear driving unit, and the output end of the linear driving unit is connected with the one end of the traction rope away from the sliding block.

[0011] As a further scheme of the utility model, the driving piece includes a fixed plate, a handle and a guide mechanism; the fixed plate is arranged on the outside of the support plate; the one end of the traction rope away from the sliding block is fixed with the fixed plate; the handle is fixedly connected with the fixed plate; and the guide mechanism is used for guiding the relative movement of the fixed plate and the support plate.

[0012] As a further scheme of the utility model, the guide mechanism includes a slide rod, the slide rod is in sliding connection with the fixed plate, one end of the slide rod is fixedly connected with the support plate, and the other end of the slide rod extends to the outside of the handle through the handle.

[0013] As a further scheme of the utility model, a slide groove is formed through the support plate, and the sliding block is slidably installed in the slide groove.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The probe can be stably stopped in the gap, and the measurement coil can stably detect the gap width, because the distance between the outer sidewalls of the two measurement coils is greater than the gap width, after the support rod is in abutment with the gap surface, the support rod is located outside the measurement coil, the measurement coil can be prevented from contacting the gap surface, and the detection precision is ensured; in the non-working state of the probe, the support rod is located outside the measurement coil, and can replace the measurement coil to contact the bearing surface, and the measurement coil can be prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a general structure schematic view of the utility model;

[0017] Figure 2 It is a general structure top view schematic view of the utility model;

[0018] Figure 3 is a front view of the overall structure of the utility model;

[0019] Figure 4 is a working state schematic view of the utility model;

[0020] Figure 5 is a sliding block structure schematic view of the utility model.

[0021] Reference signs are as follows:

[0022] 1-supporting plate, 2-measuring coil, 3-shield, 4-supporting rod, 5-sliding block, 6-connecting rod, 7-spring, 8-pulling rope, 9-fixing plate, 10-grip, 11-sliding rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-5 The utility model provides a kind of technical solutions: a gap detection special eddy current sensor probe, including supporting plate 1, supporting plate 1 two corresponding faces are equipped with measuring coil 2 and shield 3, shield 3 is set between measuring coil 2 and supporting plate 1;Measuring coil 2 both sides are equipped with the supporting rod 4 of symmetrical arrangement;

[0025] In supporting state, the maximum distance (L2) between supporting rod 4 and the opposite face of supporting plate 1 is greater than the maximum distance (L1) between measuring coil 2 and the opposite face of supporting plate 1. Figure 4 Figure 4

[0026] In the gap of exploration, the side of supporting rod 4 is equipped with the driving mechanism for guiding its movement along the probe measuring direction relative to measuring coil 2;Driving mechanism can drive supporting rod 4 to move between measuring coil 2 and shield 3.

[0027] Reference Figure 4 ​​, the probe is inserted into the gap, the driving mechanism drives the support rod 4 to move to between the measuring coil 2 and the shielding 3 before the probe is inserted into the gap, at this time, the width of the probe is equal to the distance between the outer walls of the two measuring coils 2, so that the probe can be conveniently inserted into the gap, and after the probe is inserted into the detection position, the driving mechanism drives the support rod 4 to move away from the support plate 1, and the support rod 4 can move to the outside of the measuring coil 2 and abut against the gap surface; through the abutment of the support rods 4 on the two opposite side walls of the support plate 1 and the two gap surfaces, the probe can be stably stopped in the gap, and the measuring coil 2 can stably detect the width of the gap; since the distance between the outer walls of the two measuring coils 2 is greater than the width of the gap, after the support rod 4 abuts against the gap surface, the support rod 4 is located outside the measuring coil 2, which can avoid the contact between the measuring coil 2 and the gap surface, and ensure the detection accuracy; since the probe is thin, it can only be placed flat in the non-working state, as shown in Figure 3 , in the non-working state of the probe, the support rod 4 is located outside the measuring coil 2, which can replace the contact between the measuring coil 2 and the bearing surface, and can avoid damage to the measuring coil 2.

[0028] Further, as shown in Figures 2-5 , the driving mechanism includes a sliding block 5, a connecting rod 6, a traction rope 8 and a driving member; the sliding block 5 is slidably connected with the support plate 1; the sliding block 5 is provided with an elastic member for resetting; the connecting rod 6 is hingedly connected with the sliding block 5 and the support rod 4 at two ends, and is used for converting the movement of the sliding block 5 into the movement of the support rod 4; one end of the traction rope 8 is fixed with the sliding block 5, and the other end extends to the outside of the support plate 1; the driving member is used for driving the end of the traction rope 8 located outside the support plate 1 to move away from the support plate 1; before the probe is inserted into the gap, the driving member drives the end of the traction rope 8 located outside the support plate 1 to move away from the support plate 1, and the connecting end of the traction rope 8 and the sliding block 5 drives the sliding block 5 to move outward, and the sliding block 5 drives the support rod 4 to move to the side close to the support plate 1 through the connecting rod 6, as shown in Figure 4 ; after the probe is inserted into the gap, the driving member cancels the pulling force applied to the traction rope 8, and the sliding block 5 moves to the side close to the initial position under the action of the elastic member, until the support rod 4 abuts against the gap surface; the driving mechanism of the embodiment can make the support rod 4 stop at any position outside the measuring coil 2, and the probe can be clamped in gaps of different widths under the elastic pressure of the elastic member, so that the probe can stably work in gaps of different widths.

[0029] Further, as shown in Figure 2 , the elastic member includes a spring 7, and the two ends of the spring 7 are connected with the sliding block 5 and the support plate 1 respectively; the spring 7 is used for resetting the sliding block 5.

[0030] Further, the driving member comprises a linear driving unit, an output end of the linear driving unit is connected with the end of the traction rope 8 far away from the sliding block 5; the linear driving unit can be a cylinder or the like, the linear driving unit is installed on the outer side of the support plate 1, and the linear driving unit does not extend into the gap and only acts on the movement of the end of the traction rope 8 far away from the sliding block 5.

[0031] Further, as shown in Figures 2-4 the driving member comprises a fixed plate 9, a handle 10 and a guiding mechanism; the fixed plate 9 is arranged on the outer side of the support plate 1; the end of the traction rope 8 far away from the sliding block 5 is fixed with the fixed plate 9; the handle 10 is fixedly connected with the fixed plate 9; the guiding mechanism is used for guiding the relative movement of the fixed plate 9 and the support plate 1; as shown in Figure 3 when the staff holds the handle 10, the support plate 1 can be pushed to move to the left side, since the length of the traction rope 8 is fixed, when the support plate 1 and the fixed plate 9 move relatively, the traction rope 8 drives the sliding block 5 to move to the outer side, so that the support rod 4 moves to the side close to the support plate 1; compared with using the linear driving unit, the driving member of the embodiment has the advantages of simple structure, easy operation and low cost.

[0032] Further, as shown in Figures 2-4 the guiding mechanism comprises a sliding rod 11, the sliding rod 11 is slidably connected with the fixed plate 9, one end of the sliding rod 11 is fixedly connected with the support plate 1, and the other end extends to the outer side of the handle 10 through the handle 10; the staff can hold the handle 10 and push the sliding rod 11 to the left side, so that the support plate 1 moves to the left side relative to the fixed plate 9.

[0033] Further, as shown in Figure 2 and Figure 5 a sliding groove is formed through the support plate 1, and the sliding block 5 is slidably arranged in the sliding groove; the sliding groove penetrates through the two measuring surfaces of the support plate 1.

[0034] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus including a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gap detection dedicated eddy current sensor probe, comprising a support plate (1), a measuring coil (2) and a shield (3) are installed on both corresponding surfaces of the support plate (1), the shield (3) is arranged between the measuring coil (2) and the support plate (1); characterized in that: The measuring coil (2) is provided with support rods (4) arranged symmetrically on both sides of the measuring coil (2); In the supporting state, the maximum distance between the support rods (4) and the opposite surface of the support plate (1) is greater than the maximum distance between the measuring coil (2) and the opposite surface of the support plate (1); The side edge of the support rod (4) is provided with a driving mechanism for guiding the movement of the support rod (4) relative to the measuring coil (2) in the probe measuring direction; In the probe gap state, the driving mechanism can drive the support rod (4) to move between the measuring coil (2) and the shielding element (3).

2. A gap detection eddy current sensor probe according to claim 1, characterised in that: The driving mechanism comprises a sliding block (5), a connecting rod (6), a traction rope (8) and a driving element; the sliding block (5) is in sliding connection with the support plate (1); the sliding block (5) is provided with an elastic element for resetting the sliding block (5); the connecting rod (6) is hingedly connected to the sliding block (5) and the support rod (4) at both ends, and is used for converting the movement of the sliding block (5) into the movement of the support rod (4); one end of the traction rope (8) is fixed to the sliding block (5), and the other end extends to the outside of the support plate (1); the driving element is used for driving the end of the traction rope (8) located outside the support plate (1) to move away from the support plate (1).

3. A gap detection eddy current sensor probe according to claim 2, characterised in that: The elastic element comprises a spring (7), and both ends of the spring (7) are connected to the sliding block (5) and the support plate (1).

4. A gap detection eddy current sensor probe according to claim 2, characterized in that: The driving element comprises a linear drive unit, and an output end of the linear drive unit is connected to the end of the traction rope (8) away from the sliding block (5).

5. A gap detection eddy current sensor probe dedicated for use with a gap detection system according to claim 2, characterized in that: The driving element comprises a fixed plate (9), a handle (10) and a guide mechanism; the fixed plate (9) is arranged outside the support plate (1); the end of the traction rope (8) away from the sliding block (5) is fixed to the fixed plate (9); the handle (10) is fixedly connected to the fixed plate (9); and the guide mechanism is used for guiding the relative movement of the fixed plate (9) and the support plate (1).

6. A gap detection eddy current sensor probe according to claim 5, characterised in that: The guide mechanism comprises a sliding rod (11), the sliding rod (11) is in sliding connection with the fixed plate (9), one end of the sliding rod (11) is fixedly connected to the support plate (1), and the other end of the sliding rod (11) extends to the outside of the handle (10) through the handle (10).

7. A gap detection eddy current sensor probe dedicated for use with a gap detection system according to claim 2, characterized in that: The support plate (1) is provided with a through sliding groove, and the sliding block (5) is slidingly installed in the sliding groove.

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