Method for monitoring bonding state of moving coil of large-thrust vibration shaker, and moving coil structure

Abstract

Disclosed in the present invention are a method for monitoring a bonding state of a moving coil of a large-thrust vibration shaker, and a moving coil structure. A plurality of strain gauges are evenly arranged at intervals in the axial direction of a driving coil on an inner metal armor plate corresponding to the driving coil, and the plurality of strain gauges are located at the same circumferential position of the driving coil; and whether debonding occurs between the driving coil and the inner metal armor plate is determined by means of a change in a stress value measured by each strain gauge; and the degree of debonding can be further determined by means of the ratio of the stress exceeding a normal fluctuation range. The method for monitoring a bonding state of a moving coil of a large-thrust shaker and the moving coil structure of the present invention can detect slight debonding between the driving coil and the metal armor plates on two sides, thereby realizing early warning and avoiding further deterioration of problems.

Description

A method for monitoring the bonding state of the moving coil in a high-thrust vibration table and the moving coil structure Technical Field

[0001] This invention relates to the field of vibration table technology, specifically to a method for monitoring the bonding state of the moving coil of a high-thrust vibration table and the structure of the moving coil. Background Technology

[0002] Electric vibration tables are widely used in reliability research and testing of complete products and components in industries such as aviation, aerospace, weaponry, electronics, shipbuilding, machinery, energy, chemical engineering, and instrumentation. The moving coil is one of the key components of an electric vibration table, primarily used to drive the table surface to move and generate vibration. The moving coil of an electric vibration table is generally made of enameled wire bonded and cured with epoxy resin to inner and outer carbon fiber metal armor plates connected to the moving coil frame, thus transmitting the driving force of the moving coil to the dynamic table surface in real time through the moving coil frame.

[0003] As electric vibration tables become larger, the demand for thrust is increasing dramatically. For high-thrust vibration tables, the drive coil structure, which generates the driving force, often bears high-frequency, strong vibrations and heavy loads during daily operation. In actual use, the drive coil often detaches from the carbon fiber metal armor plate due to insufficient bonding strength, and then separates from the drive coil frame, causing damage to the drive coil.

[0004] Currently, there is a general lack of structures or methods in various high-thrust electric vibration table moving coil structures that can monitor the bonding state between the driving moving coil and the metal armor plates on both sides in real time. In actual use, when slight debonding of the driving moving coil occurs, there is no timely warning, which affects the generation of vibration table thrust and the accuracy of testing.

[0005] Furthermore, due to the failure to carry out timely maintenance, the detachment of the drive coil from the metal armor plates on both sides may worsen, potentially damaging the drive coil, causing significant damage to the equipment, and resulting in substantial economic losses. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a method and structure for monitoring the bonding state of the moving coil in a high-thrust vibration table. This method can detect the bonding when the degree of debonding between the driving moving coil and the metal armor plates on both sides is still relatively slight, enabling early warning and preventing the problem from worsening.

[0007] To achieve the above-mentioned technical objectives, the present invention employs the following technical means:

[0008] A method for monitoring the bonding state of the moving coil on a high-thrust vibration table includes the following steps:

[0009] Step S1: Divide the drive coil into n equal parts along its axial length. The length of each part is recorded as one unit length. Starting from a position one unit length away from the bottom of the drive coil, attach a strain gauge to the inner metal armor plate every unit length. The attaching position corresponds to the division point of the drive coil. Attach a total of n strain gauges and number them 1, 2, 3...n.

[0010] Step S2: Based on the strain gauge number, let the actual stress at the i-th drive coil equidistant point where the strain gauge is attached be σ. i (i = 1, 2... n), real-time monitoring of the actual stress σ of each strain gauge i The unit stress value σ at each position of the metal armor plate is obtained by equation (1).

[0011]

[0012] Step S3: Set the first stress relative deviation boundary coefficient η1; set the second stress relative deviation boundary coefficient η2; set the third stress relative deviation boundary coefficient η3; set the fourth stress relative deviation boundary coefficient η4; the relationship between the four stress relative deviation boundary coefficients is η1 < η2 < η3 < η4.

[0013] Given that the normal range of stress at the i-th drive coil division point is (η3~η4)iσ, determine in real time whether η3iσ≤σ i To determine whether ≤η4iσ holds true, we need to check whether there is any debonding between the drive coil and the inner metal armor plate, where i = 1, 2, 3…n.

[0014] Beneficial effects: During the normal operation of the vibration table, the stress on the armor plate will fluctuate, that is, the stress may increase slightly or decrease slightly, but it will fluctuate within a certain range. When the stress value on the armor plate exceeds the normal range, it can be determined that the drive coil and the armor plate have debonded. The present invention provides a method for monitoring the bonding state of the moving coil of a high-thrust vibration table. By attaching strain gauges to the inside of the metal armor plate, when debonding occurs between the drive coil and the metal armor plate, even a very small relative displacement or deformation can cause a change in the resistance value of the strain gauge. The degree of debonding can be further determined by the proportion of stress exceeding the normal fluctuation range. The greater the proportion of stress deviating from the normal range, the more severe the debonding.

[0015] In an optional implementation, in step S3, if the actual stress at the first drive coil division point does not satisfy η3σ≤σ1≤η4σ, then it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. Specifically:

[0016] Step A: Calculate the relative deviation δ1 of the stress at the equal division points of the first drive coil;

[0017] Step B: When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil and the inner metal armor plate.

[0018] When η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate of this segment;

[0019] When δ1 < η1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate.

[0020] Beneficial effects: The present invention further discusses the case where the actual stress at the first drive coil division point does not satisfy η3σ≤σ1≤η4σ separately, because in this case, the debonding can only occur between the drive coil below the first drive coil division point and the inner metal armor plate. The degree of debonding can be judged by the range of the relative deviation δ1 of the stress at the first drive coil division point.

[0021] In an optional implementation, in step S3, if the actual stress at the k-th drive coil division point does not satisfy η3kσ≤σ k If η ≤ 4kσ, then determine whether the stress magnitude at its adjacent (k-1)th point is within the given normal range, according to η3(k-1)σ ≤ σ. k-1 Whether ≤η4(k-1)σ holds true is used to determine if there is a region of detachment between the drive coil and the inner metal armor plate, k=2,3…n.

[0022] Beneficial effect: When the actual stress at the kth drive coil division point does not satisfy η3kσ≤σ k When ≤η4kσ, the region where debonding will inevitably occur between the drive coil and the inner armor plate can be determined by further judging whether the stress magnitude at the (k-1)th point of the adjacent point is within the given normal range, k=2,3…n.

[0023] In an alternative implementation, if η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ holds, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the (k-1)th driving coil division point and the kth driving coil division point. Specifically:

[0024] C1. Calculate the relative deviation δ of the stress at the equally spaced points of the k-th driving coil. k ;

[0025] C2, when η2≤δ k When η<3, it is determined that there is slight debonding between the drive coil and the inner metal armor plate; when η<1≤δ k When η < 2, it is determined that moderate debonding has occurred between the drive coil and the inner metal armor plate; when δ is satisfied... kWhen η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate of this segment.

[0026] Beneficial effect: If η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ holds, it means that there is no debonding between the driving coil and the inner armor plate in the area below the (k-1)th driving coil division point, but debonding between the driving coil and the inner armor plate occurs between the (k-1)th driving coil division point and the kth driving coil division point.

[0027] In an alternative implementation, if η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ is not true, then sequentially check whether the stress values ​​at points k-2, k-3, ..., 1 are within the normal range, until the stress value σ at point m. m Satisfying η3mσ≤σ m When ≤η4mσ, stop further judgment and obtain the value of m, m<k-1. Based on the range of the value of m, determine the area where debonding occurs between the drive coil and the inner metal armor plate. Specifically:

[0028] If m ≥ 1, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the division point of the m-th driving coil and the division point of the (m+1)-th driving coil, and the relative deviation δ of the stress at the division point of the (m+1)-th driving coil is calculated according to the formula for relative stress deviation. m+1 When η2≤δ m+1 If η<3, then it is determined that there is slight debonding between the drive coil and the inner metal armor plate; if η<1 ≤ δ m+1 When η < 2, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate; when δ is satisfied... m+1 If η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate in this segment;

[0029] If m≥1 does not exist, it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. The relative deviation δ1 of the stress at the first drive coil division point is calculated according to the stress relative deviation formula. When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil segment and the inner metal armor plate; when η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil segment and the inner metal armor plate; when δ1<η1 is satisfied, it is determined that there is severe debonding between the drive coil segment and the inner metal armor plate.

[0030] Beneficial effect: If η3(k-1)σ≤σ k-1The condition ≤η4(k-1)σ is not true, indicating that there is a region of detachment between the driving coil and the inner armor plate below the (k-1)th driving coil division point. Therefore, it is necessary to continue judging downwards to determine the region where detachment must occur with the inner armor plate. If m≥1, it indicates that there is detachment between the driving coil and the inner metal armor plate between the mth and (m+1)th driving coil division points, while there is no detachment between the driving coil and the inner armor plate below the mth driving coil division point. If m≥1 does not exist, it indicates that there must be detachment between the driving coil and the inner metal armor plate below the 1st driving coil division point, and this causes the stress values ​​at all division points from the 1st to the kth driving coil division point to be outside the normal range.

[0031] In one optional embodiment, the relative deviation of the stress at the equally spaced points of the drive coil is δ. i (i=1,2…n), the relative deviation δ of the stress at the equally spaced points of each driving coil i The calculation formula is:

[0032] in,

[0033] σ ei The theoretical stress at the equally spaced points of the drive coils of each strain gauge bonded to the metal armor plate is obtained by equation (2).

[0034] σ ei =iσ (2).

[0035] Beneficial effect: By dividing the difference between the theoretical stress and the actual stress at each equally divided point of the drive coil by the theoretical stress, the deviation between the actual stress and the theoretical stress can be obtained. The greater the deviation, the more severe the debonding between the drive coil and the inner metal armor plate in the area corresponding to the equally divided point of the drive coil.

[0036] In one optional embodiment, the first stress relative deviation boundary coefficient η1 is 0.65 < η1 ≤ 0.75; the second stress relative deviation boundary coefficient η2 is 0.75 < η2 ≤ 0.85; the third stress relative deviation boundary coefficient η3 is 0.85 < η3 ≤ 0.95; and the fourth stress relative deviation boundary coefficient η4 is 0.95 < η4 ≤ 1.05.

[0037] Beneficial effect: Different high-thrust vibration tables have different stress fluctuations on their armor plates during normal operation, therefore, the ranges of four stress relative deviation boundary coefficients are given.

[0038] In one optional embodiment, taking into account the influence of the axial length of the vibration table drive coil and the number of bonded strain gauges on the bonding strength, the number of bonded strain gauges is 5 to 10.

[0039] The present invention further discloses a moving coil structure for a high-thrust vibration table capable of monitoring the bonding state, comprising a moving coil frame, a drive coil, an inner metal armor plate, an outer metal armor plate, and strain gauges; wherein the inner and outer metal armor plates are fixed on the left and right sides of the moving coil frame.

[0040] The drive coil is connected to the moving coil frame and is clamped and fixed by the inner metal armor plate and the outer metal armor plate;

[0041] The strain gauges are fixed to the inner metal armor plate, and there are multiple strain gauges. The multiple strain gauges are evenly spaced along the axial direction of the inner metal armor plate, and the multiple spaced strain gauges are located at the same circumferential position on the inner metal armor plate.

[0042] In one optional embodiment, the inner metal armor plate and the outer metal armor plate are respectively bonded and cured onto the moving coil frame with epoxy resin adhesive;

[0043] The drive coil is bonded and cured onto the moving coil frame with epoxy resin adhesive;

[0044] The strain gauge is bonded and cured to the inner metal armor plate with epoxy resin adhesive.

[0045] In summary, the present invention provides a method and structure for monitoring the bonding state of the driving coil in a high-thrust vibration table. This method can effectively detect the debonding between the driving coil and the metal armor plates on both sides. Furthermore, it can determine the degree of debonding by measuring the proportion of stress exceeding the normal fluctuation range. This allows for early detection when the debonding between the driving coil and the inner metal armor plate is still relatively minor, enabling early warning and preventing the problem from worsening. Attached Figure Description

[0046] Figure 1 is a schematic diagram of the moving coil structure of the present invention;

[0047] 1. Moving coil frame; 2. Outer metal armor plate; 3. Drive coil; 4. Inner metal armor plate; 5. Strain gauge.

[0048] Figure 2 is a schematic diagram of the monitoring method of the present invention;

[0049] Figure 3 shows the strain gauge attachment and the numbering of each division point;

[0050] Figure 4 is a flowchart for judging the situation where the stress at the first drive coil division point is not within the normal range and the stress at each drive coil division point is within the normal range.

[0051] Figure 5 is a flowchart for judging the situation where the stress at the kth driving coil dividing point is not within the normal range, k = 2, 3...n. Detailed Implementation

[0052] The present invention will be further described below with reference to the embodiments in the accompanying drawings, so that those skilled in the art can better understand and implement the present invention, but the embodiments are not intended to limit the present invention.

[0053] As shown in Figure 4, the present invention provides a method for monitoring the bonding state of the moving coil of a high-thrust vibration table, comprising the following steps:

[0054] Step S1: Divide the drive coil into n equal parts along its axial length. The length of each part is recorded as one unit length. Starting from a position one unit length away from the bottom of the drive coil, attach a strain gauge to the inner metal armor plate every unit length. The attaching position corresponds to the division point of the drive coil. Attach a total of n strain gauges and number them 1, 2, 3...n.

[0055] Step S2: Based on the strain gauge number, let the actual stress at the i-th drive coil equidistant point where the strain gauge is attached be σ. i (i = 1, 2... n), real-time monitoring of the actual stress σ of each strain gauge i The unit stress value σ at each position of the metal armor plate is obtained by equation (1).

[0056]

[0057] Step S3: Set the first stress relative deviation boundary coefficient η1; set the second stress relative deviation boundary coefficient η2; set the third stress relative deviation boundary coefficient η3; set the fourth stress relative deviation boundary coefficient η4; the relationship between the four stress relative deviation boundary coefficients is η1 < η2 < η3 < η4.

[0058] Given that the normal range of stress at the i-th drive coil division point is (η3~η4)iσ, determine in real time whether η3iσ≤σ i To determine whether ≤η4iσ holds true, we need to check whether there is any debonding between the drive coil and the inner metal armor plate, where i = 1, 2, 3... n.

[0059] This invention discloses a method for monitoring the adhesion state of the driving coil in a high-thrust vibration table. Strain gauges are highly sensitive to minute strains; when debonding occurs between the driving coil and the metal armor plate, even a very small relative displacement or deformation can cause a change in the strain gauge's resistance value. During normal operation of the vibration table, the stress on the armor plate fluctuates—it may increase or decrease slightly—but it will fluctuate within a certain range. When the stress value on the armor plate exceeds this normal range, it can be determined that debonding has occurred between the driving coil and the armor plate. The degree of debonding can be further determined by the proportion of stress exceeding the normal fluctuation range; the greater the proportion of stress deviating from the normal range, the more severe the debonding. This invention defines four relative stress deviation boundary coefficients to determine whether the degree of debonding is mild, moderate, or severe.

[0060] In an optional embodiment, in step S3, if the actual stress at the first drive coil division point does not satisfy η3σ≤σ1≤η4σ, then it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. Specifically:

[0061] Step A: Calculate the relative deviation δ1 of the stress at the equal division points of the first drive coil;

[0062] Step B: When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil and the inner metal armor plate.

[0063] When η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate of this segment;

[0064] When δ1 < η1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate.

[0065] It is understood that the present invention further discusses the case where the actual stress at the first drive coil division point does not satisfy η3σ≤σ1≤η4σ separately, because this case can only be caused by debonding between the drive coil below the first drive coil division point and the inner metal armor plate. The degree of debonding can be determined by the range of the relative deviation δ1 of the stress at the first drive coil division point.

[0066] As shown in Figure 5, in the method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to the present invention, where k = 2, 3...n, the method for determining the situation where the stress at the kth equally spaced point of the driving coil is not within the normal range is as follows:

[0067] In step S3, if the actual stress at the kth driving coil division point does not satisfy η3kσ≤σ kIf η ≤ 4kσ, then determine whether the stress magnitude at its adjacent (k-1)th point is within the given normal range, according to η3(k-1)σ ≤ σ. k-1 The condition ≤η4(k-1)σ is used to determine if there is a region of debonding between the drive coil and the inner metal armor plate. If the actual stress at the k-th equally spaced point of the drive coil does not satisfy η3kσ≤σ, then... k When ≤η4kσ, the present invention determines the area where debonding will inevitably occur between the drive coil and the inner armor plate by further judging whether the stress magnitude of the adjacent point k-1 is within the given normal range.

[0068] In an alternative embodiment, if η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ holds, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the (k-1)th driving coil division point and the kth driving coil division point. Specifically:

[0069] C1. Calculate the relative deviation δ of the stress at the equally spaced points of the k-th driving coil. k ;

[0070] C2, when η2≤δ k When η<3, it is determined that there is slight debonding between the drive coil and the inner metal armor plate; when η<1≤δ k When η < 2, it is determined that moderate debonding has occurred between the drive coil and the inner metal armor plate; when δ is satisfied... k When η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate of this segment.

[0071] It is understandable that if η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ holds, it means that there is no debonding between the driving coil and the inner armor plate in the area below the (k-1)th driving coil division point, but debonding between the driving coil and the inner armor plate occurs between the (k-1)th driving coil division point and the kth driving coil division point.

[0072] In an alternative embodiment, if η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ is not true, then sequentially check whether the stress values ​​at points k-2, k-3, ... 1 are within the normal range, until the stress value σ at point m. m Satisfying η3mσ≤σ m When ≤η4mσ, stop further judgment and obtain the value of m, m<k-1. Based on the range of the value of m, determine the area where debonding occurs between the drive coil and the inner metal armor plate. Specifically:

[0073] If m ≥ 1, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the division point of the m-th driving coil and the division point of the (m+1)-th driving coil, and the relative deviation δ of the stress at the division point of the (m+1)-th driving coil is calculated according to the formula for relative stress deviation. m+1 When η2≤δ m+1 If η<3, then it is determined that there is slight debonding between the drive coil and the inner metal armor plate; if η<1 ≤ δ m+1 When η < 2, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate; when δ is satisfied... m+1 If η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate.

[0074] If m≥1 does not exist, it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. The relative deviation δ1 of the stress at the first drive coil division point is calculated according to the stress relative deviation formula. When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil segment and the inner metal armor plate; when η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil segment and the inner metal armor plate; when δ1<η1 is satisfied, it is determined that there is severe debonding between the drive coil segment and the inner metal armor plate.

[0075] It is understandable that if η3(k-1)σ≤σ k-1 The condition ≤η4(k-1)σ is not true, indicating that there is a region of detachment between the driving coil and the inner armor plate below the (k-1)th driving coil division point. Therefore, it is necessary to continue judging downwards to determine the region where detachment must occur with the inner armor plate. If m≥1, it indicates that there is detachment between the driving coil and the inner metal armor plate between the mth and (m+1)th driving coil division points, while there is no detachment between the driving coil and the inner armor plate below the mth driving coil division point. If m≥1 does not exist, it indicates that there must be detachment between the driving coil and the inner metal armor plate below the 1st driving coil division point, and this causes the stress values ​​at all division points from the 1st to the kth driving coil division point to be outside the normal range.

[0076] In one optional embodiment, taking into account the influence of the axial length of the vibration table drive coil and the number of bonded strain gauges on the bonding strength, the number of bonded strain gauges is 5 to 10.

[0077] In an optional embodiment, the relative deviation of the stress at the equally spaced points of the drive coil is δ. i (i=1,2…n), the relative deviation δ of the stress at the equally spaced points of each driving coil i The calculation formula is:

[0078] in,

[0079] σ ei The theoretical stress at the equally spaced points of the drive coils of each strain gauge bonded to the metal armor plate is obtained by equation (2).

[0080] σ ei =iσ (2).

[0081] It is understandable that by dividing the difference between the theoretical stress and the actual stress at each equal division point of the drive coil by the theoretical stress, the deviation between the actual stress and the theoretical stress can be obtained. The greater the deviation, the more severe the debonding between the drive coil and the inner metal armor plate in the area corresponding to the equal division point of the drive coil.

[0082] In an optional embodiment, the first stress relative deviation boundary coefficient η1 is 0.65 < η1 ≤ 0.75; the second stress relative deviation boundary coefficient η2 is 0.75 < η2 ≤ 0.85; the third stress relative deviation boundary coefficient η3 is 0.85 < η3 ≤ 0.95; and the fourth stress relative deviation boundary coefficient η4 is 0.95 < η4 ≤ 1.05.

[0083] As shown in Figures 1 and 2, the present invention further provides a moving coil structure for a high-thrust vibration table capable of monitoring the bonding state between the drive coil and the metal armor plates on both sides, including a moving coil frame 1, a drive coil 3, an inner metal armor plate 4, an outer metal armor plate 2, and strain gauges 5; wherein, the inner metal armor plate 4 and the outer metal armor plate 2 are bonded and cured on the moving coil frame 1 with epoxy resin adhesive; the drive coil 3 is bonded and cured on the moving coil frame 1 with epoxy resin adhesive and is clamped and fixed by the inner metal armor plate 4 and the outer metal armor plate 2; the strain gauges 5 are bonded and cured on the inner metal armor plate 4 with epoxy resin adhesive, and the strain gauges 5 are pasted at the same circumferential position at different axial positions of the inner metal armor plate 4, with multiple strain gauges 5 being pasted at equal intervals.

[0084] In summary, the present invention provides a method and structure for monitoring the bonding state of the driving coil in a high-thrust vibration table. This method can effectively detect the debonding between the driving coil and the metal armor plates on both sides. Furthermore, it can determine the degree of debonding by measuring the proportion of stress exceeding the normal fluctuation range. This allows for early detection when the debonding between the driving coil and the inner metal armor plate is still relatively minor, enabling early warning and preventing the problem from worsening.

[0085] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes that can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention are all within the protection scope of the claims of the present invention.

Claims

1. A method for monitoring the bonding state of the moving coil of a high-thrust vibration table, characterized in that, Includes the following steps: Step S1: Divide the drive coil into n equal parts along its axial length. The length of each part is recorded as one unit length. Starting from a position one unit length away from the bottom of the drive coil, attach a strain gauge to the inner metal armor plate every unit length. The attaching position corresponds to the division point of the drive coil. Attach a total of n strain gauges and number them 1, 2, 3...n. Step S2: Based on the strain gauge number, let the actual stress at the i-th drive coil equidistant point where the strain gauge is attached be σ. i (i = 1, 2... n), real-time monitoring of the actual stress σ of each strain gauge i The unit stress value σ at each equally spaced point of the driving coil on the metal armor plate is obtained by equation (1). Step S3: Set the first stress relative deviation boundary coefficient η1; set the second stress relative deviation boundary coefficient η2; set the third stress relative deviation boundary coefficient η3; set the fourth stress relative deviation boundary coefficient η4; four The relative stress deviation boundary coefficients are in the following order: η1 < η2 < η3 < η4. Given that the normal range of stress at the i-th drive coil dividing point on the metal armor plate is (η3~η4)iσ, determine in real time whether η3iσ≤σ. i To determine whether ≤η4iσ holds true, we need to check whether there is any debonding between the drive coil and the inner metal armor plate, where i = 1, 2, 3…n.

2. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 1, characterized in that, In step S3, if the actual stress at the first drive coil division point does not satisfy η3σ≤σ1≤η4σ, then it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. Specifically: Step A: Calculate the relative deviation δ1 of the stress at the equal division points of the first drive coil; Step B: When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil and the inner metal armor plate. When η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate of this segment; When δ1 < η1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate.

3. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 1, characterized in that, In step S3, if the actual stress at the kth driving coil dividing point on the metal armor plate does not satisfy η3kσ≤σ k If η ≤ 4kσ, then determine whether the stress magnitude at its adjacent (k-1)th point is within the given normal range, according to η3(k-1)σ ≤ σ. k-1 Whether ≤η4(k-1)σ holds true is used to determine if there is a region of detachment between the drive coil and the inner metal armor plate, k=2,3…n.

4. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 3, characterized in that, If η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ holds, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the (k-1)th driving coil division point and the kth driving coil division point. Specifically: C1. Calculate the relative deviation δ of the stress at the equally spaced points of the k-th driving coil. k ; C2, when η2≤δ k When η<3, it is determined that there is slight debonding between the drive coil and the inner metal armor plate; when η<1≤δ k When η < 2, it is determined that moderate debonding has occurred between the drive coil and the inner metal armor plate; when δ is satisfied... k When η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate of this segment.

5. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 3, characterized in that, If η3(k-1)σ≤σ k-1 If ≤η4(k-1)σ is not true, then sequentially check whether the stress values ​​at points k-2, k-3, ... 1 are within the normal range, until the stress value σ at point m. m Satisfying η3mσ≤σ m When ≤η4mσ, stop further judgment and obtain the value of m, m<k-1. Based on the range of the m value, determine the area where debonding occurs between the drive coil and the inner metal armor plate. Specifically, If m ≥ 1, then it is determined that there is debonding between the driving coil and the inner metal armor plate between the division point of the m-th driving coil and the division point of the (m+1)-th driving coil, and the relative deviation δ of the stress at the division point of the (m+1)-th driving coil is calculated according to the formula for relative stress deviation. m+1 When η2≤δ m+1 If η < 3, it is determined that there is slight debonding between the drive coil and the inner metal armor plate of this segment; When η1≤δ m+1 If η < 2, it is determined that there is moderate debonding between the drive coil and the inner metal armor plate in this segment; When δ is satisfied m+1 If η < 1, it is determined that there is severe debonding between the drive coil and the inner metal armor plate in this segment; If m≥1 does not exist, it is determined that the drive coil below the first drive coil division point has debonded from the inner metal armor plate. The relative deviation δ1 of the stress at the first drive coil division point is calculated according to the stress relative deviation formula. When η2≤δ1<η3 is satisfied, it is determined that there is slight debonding between the drive coil segment and the inner metal armor plate; when η1≤δ1<η2 is satisfied, it is determined that there is moderate debonding between the drive coil segment and the inner metal armor plate; when δ1<η1 is satisfied, it is determined that there is severe debonding between the drive coil segment and the inner metal armor plate.

6. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 1, characterized in that, The relative deviation of the stress at the equally spaced points of the drive coil is δ. i (i=1,2…n), the relative deviation δ of the stress at the equally spaced points of each driving coil i The calculation formula is: in, σ ei The theoretical stress at each equally spaced point of the driving coil on the metal armor plate is calculated using equation (2). s ei = iσ (2).

7. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 1, characterized in that, The first stress relative deviation boundary coefficient η1 is 0.65 < η1 ≤ 0.75; The second stress relative deviation boundary coefficient η2 is 0.75 < η2 ≤ 0.85; The third stress relative deviation boundary coefficient η3 is 0.85 < η3 ≤ 0.95; The fourth stress relative deviation boundary coefficient η4 is 0.95 < η4 ≤ 1.

05.

8. The method for monitoring the bonding state of the moving coil of a high-thrust vibration table according to claim 1, characterized in that, The number of the bonded strain gauges is 5 to 10.

9. A moving coil structure for a high-thrust vibration table, applied to the method for monitoring the bonding state of the moving coil of a high-thrust vibration table as described in any one of claims 1 to 8, characterized in that, It includes a moving coil frame (1), a drive coil (3), an inner metal armor plate (4), an outer metal armor plate (2), and a strain gauge (5); wherein the inner metal armor plate (4) and the outer metal armor plate (2) are fixed on the left and right sides of the moving coil frame (1); The drive coil (3) is connected to the moving coil frame (1) and is clamped and fixed by the inner metal armor plate (4) and the outer metal armor plate (2); The strain gauges (5) are fixed on the inner metal armor plate (4), including multiple strain gauges (5) which are evenly spaced along the axial direction of the inner metal armor plate (4), and the multiple spaced strain gauges (5) are located at the same circumferential position on the inner metal armor plate.

10. The moving coil structure of the high-thrust vibration table according to claim 9, characterized in that, The inner metal armor plate (4) and the outer metal armor plate (2) are respectively bonded and cured onto the moving coil skeleton (1) with epoxy resin adhesive; The drive coil (3) is bonded and cured onto the moving coil frame (1) with epoxy resin adhesive; The strain gauge (5) is bonded and cured onto the inner metal armor plate (4) with epoxy resin adhesive.

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