A method and system for monitoring the connection strength between a moving coil of a vibration table and a reinforcing armor plate

Abstract

The application discloses a kind of vibration table moving coil and reinforcing armor plate connection strength monitoring method and system, in vibration table moving coil arbitrary section along the inner and outer layer reinforcing armor plate of moving coil, longitudinal uniform arrangement multiple strain gauges and standard strain gauges are arranged on, utilize the strain gauge value of on-line measurement real-time on-line calculation inner and outer two layers moving coil and reinforcing armor plate between local debonding coefficient and integral debonding coefficient, judge the debonding degree between inner and outer layer moving coil and reinforcing armor plate, and then realize the monitoring of connection strength, simultaneously give the explanation whether moving coil is long-term under eccentric load condition.The application can realize the on-line dynamic monitoring of vibration table moving coil and reinforcing armor plate between connection strength, can carry out on-line evaluation to vibration table moving coil performance, improve vibration table key component use reliability and safety.

Description

Technical Field

[0001] This invention relates to the field of vibration table technology, specifically to a method and system for monitoring the connection strength between the moving coil of a vibration table and a reinforcing armor plate. Background Technology

[0002] In today's cutting-edge scientific exploration and rigorous engineering practices, electric vibration tables have become indispensable core experimental equipment in various fields. Especially high-thrust vibration tables, with their powerful driving force, can accurately reproduce extremely complex vibration scenarios, providing reliable technical support for the vibration resistance and durability testing of large components such as aerospace vehicles. The moving coil, as the core component of the electric vibration table, is driven by alternating current, thereby generating a precisely set vibration waveform on the table surface. The moving coil is mainly composed of enameled wires bonded together with epoxy resin, and its performance plays a decisive role in the overall performance of the vibration table. To enhance the strength of the moving coil, its inner and outer sides are generally reinforced with epoxy resin and reinforced carbon fiber armor plates.

[0003] In practical engineering testing of large test specimens, high-thrust vibration tables often need to operate continuously for extended periods, enduring extreme vibration and impact loads. As a result, the bonded area between the moving coil and the reinforcing armor plate is continuously subjected to high-intensity vibration and impact loads. Coupled with the complex alternating temperature of the moving coil, the bonding performance between the moving coil and the reinforcing armor plate gradually deteriorates over time. However, currently, there is a general lack of methods for real-time online monitoring of the connection strength between the moving coil and the reinforcing armor plate. This makes it impossible to accurately determine the connection status between the moving coil and the reinforcing armor plate during long-term heavy-load vibration table tests, affecting the output stability of the moving coil. Furthermore, because slight debonding between the moving coil and the armor plate in the early stages often goes undetected, it often leads to a failure to promptly repair any potential reduction in connection strength. Subsequent heavy-load vibration operations further exacerbate the debonding between the moving coil and the reinforcing armor plate, potentially causing debonding damage between the moving coil drive coils and even irreversible physical damage to the mechanical structure of the vibration table, resulting in significant economic losses. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a method for monitoring the connection strength between the moving coil of a vibration table and a reinforcing armor plate, comprising the following steps:

[0005] Step S1: Arbitrarily select a longitudinal section of the moving coil of the vibration table, and denote the longitudinal length of the moving coil under this section as L. Divide the moving coil under this section into m equal parts along the longitudinal direction, and measure the distance from the bottom of the moving coil from the bottom of this section. Starting from the position, sequentially, at intervals, on the inner reinforcing armor plates below this section... m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as inner layer L. iStrain gauge, where: i = 1, 2, L, m;

[0006] The distance from the bottom of the moving coil under this cross-section Starting from the position, sequentially at intervals on the outer reinforcing armor plate below this section. m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as outer layer R. i Strain gauge, where: i = 1, 2, L, m;

[0007] At a distance l from the bottom of the moving coil in this cross-section, a standard strain gauge is placed on both the inner and outer reinforcing armor plates, denoted as L for the inner layer and L for the outer layer, respectively. s Standard strain gauge and outer R s Standard strain gauge.

[0008] Step S2: Record the inner layer L during the vibration table operation in real time. i Strain gauge, outer R i Strain gauge, inner layer L s Standard strain gauge, outer R s The strain values ​​of the standard strain gauges are recorded as follows: Real-time calculation of the unit strain value of the inner reinforcing armor plate is ε L The unit strain value ε of the outer reinforcing armor plate R The calculation formula is:

[0009]

[0010] Step S3: Define the position of the inner layer L0 strain gauge as the bottom position of the inner layer moving coil, and calculate the inner layer L... i Strain gauge and inner layer L i-1 The local debonding coefficient between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0011]

[0012] Define the position of the outer R0 strain gauge as the bottom position of the outer moving coil, and calculate the outer R... i Strain gauge and outer R i-1 The local debonding coefficient between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0013]

[0014] Step S4: Define the lower limit of the inner layer debonding coefficient as η min The upper limit of the inner layer debonding coefficient is η max The lower limit of the outer layer debonding coefficient is λ. minThe upper limit of the outer layer debonding coefficient is λ. max ,according to and The relationship between the numerical value and the upper and lower limits of the debonding coefficient between the inner and outer layers is used to determine the connection strength between the moving coil and the inner and outer reinforcing armor plates.

[0015] Step S5: Calculate the overall debonding coefficient μ of the inner layer. L Overall debonding coefficient of outer layer μ R The calculation formula is:

[0016]

[0017] According to μ L and μ R The relationship between the numerical value and the upper and lower limits of the debonding coefficient of the inner and outer layers is used to determine the overall connection strength between the moving coil of the inner and outer layers and the reinforcing armor plate.

[0018] Step S6: Define the upper limit of the threshold δ for the deviation of the inner and outer layer connection strength. max Lower limit of the inner and outer layer connection strength deviation threshold δ min Calculate the overall debonding coefficient μ of the inner layer. L Debonding coefficient μ of the outer layer R deviation ratio δ μ The calculation formula is:

[0019]

[0020] According to the deviation ratio δ μ The relationship between the upper and lower limits of the inner and outer layer connection strength deviation threshold is used to determine whether there is a long-term off-center load during the use of the moving coil of the vibration table. The specific steps are as follows:

[0021] If δ min <δ μ <δ max This indicates that there is no off-center load on the moving coil of the vibration table during long-term use;

[0022] If δ μ ≥δ max or δ μ ≤δ min This indicates that the moving coil of the vibration table is under eccentric loading during long-term use.

[0023] Furthermore, in step S4, the specific steps for determining the connection strength between the moving coil and the inner and outer reinforcing armor plates are as follows:

[0024] Step S41: Determine the connection strength between the inner moving coil and the reinforcing armor plate, which can be divided into three cases:

[0025] If satisfied Explanation of inner layer L i Strain gauge and inner layer Li-1 No debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength.

[0026] If satisfied Explanation of inner layer L i Strain gauge and inner layer L i-1 Slight debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average.

[0027] If satisfied Explanation of inner layer L i Strain gauge and inner layer L i-1 Severe debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength;

[0028] Step S42: Determine the connection strength between the outer moving coil and the reinforcing armor plate, which can be divided into three cases:

[0029] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 No debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength.

[0030] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 Slight debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average.

[0031] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 Severe debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength;

[0032] Furthermore, in step S5, the specific steps for determining the overall connection strength between the inner and outer moving coils and the reinforcing armor plate are as follows:

[0033] Step S51: Determine the overall connection strength between the inner moving coil and the reinforcing armor plate, and consider the following three cases:

[0034] If 0 < μ L <η min This indicates that there was no detachment between the inner moving coil and the reinforcing armor plate, and the overall connection strength was high.

[0035] If η is satisfied min ≤μ L <η maxThis indicates that there is slight debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is average.

[0036] If μ is satisfied L ≥η max This indicates that there is severe debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is poor.

[0037] Step S52: Determine the overall connection strength between the outer moving coil and the reinforcing armor plate, which can be divided into the following three cases:

[0038] If 0 < μ R <λ min This indicates that there was no detachment between the outer moving coil and the reinforcing armor plate, and the overall connection strength was high.

[0039] If λ is satisfied min ≤μ R <λ max This indicates that there is slight debonding between the outer moving coil and the reinforcing armor plate, and the overall connection strength is average.

[0040] If μ is satisfied R ≥λ max This indicates that there is severe debonding between the outer moving coil and the reinforcing armor plate, resulting in poor overall connection strength.

[0041] Preferably, the number of equal divisions m along the longitudinal direction of the moving coil ranges from 5 to 8.

[0042] Preferably, the inner layer L s Standard strain gauge and outer R s The range of values ​​for the standard strain gauge distance *l* from the bottom of the moving coil is:

[0043] Preferably, the lower limit η of the inner layer debonding coefficient min The value range is 0.1 to 0.15, and the upper limit of the inner layer debonding coefficient η is... max The value range is 0.2 to 0.3.

[0044] Preferably, the lower limit λ of the outer layer debonding coefficient min The value range is 0.1 to 0.15, and the upper limit of the outer layer debonding coefficient λ is... max The value range is 0.2 to 0.3.

[0045] Preferably, the upper limit of the threshold for the deviation of the inner and outer layer connection strength is δ. max The value range is 1.1 to 1.2, and the lower limit of the inner and outer layer connection strength deviation threshold δ min The value range is 0.8 to 0.9.

[0046] This invention further discloses a vibration table moving coil and reinforcing armor plate connection strength monitoring system, including a double-layer drive coil, an inner reinforcing armor plate, an outer reinforcing armor plate, strain gauges, and an external control processing module. The double-layer drive coil is bonded to the inner and outer reinforcing armor plates respectively with epoxy resin. The strain gauges are bonded and cured to the inner and outer reinforcing armor plates with epoxy resin adhesive. Multiple strain gauges are electrically connected to the external control processing module via data lines. The external control processing module adopts the vibration table moving coil and reinforcing armor plate connection strength monitoring method described above.

[0047] Beneficial effects:

[0048] 1. The method for monitoring the connection strength between the moving coil and the reinforcing armor plate proposed in this invention can effectively detect the connection strength. It can detect slight debonding between the moving coil and the inner and outer reinforcing armor plates, thus providing early warning and preventing further damage to the moving coil and causing major damage to the instrument and equipment.

[0049] 2. The method for monitoring the connection strength between the moving coil of the vibration table and the reinforcing armor plate proposed in this invention can specifically determine the specific area of ​​debonding between the moving coil and the inner and outer reinforcing armor plates, as well as the degree of debonding in that area, thereby obtaining the connection strength information between the moving coil and the inner and outer reinforcing armor plates.

[0050] 3. The method for monitoring the connection strength between the moving coil of the vibration table and the reinforcing armor plate proposed in this invention can not only determine the degree of local debonding between the moving coil and the inner and outer reinforcing armor plates, but also the degree of overall debonding between the moving coil and the inner and outer reinforcing armor plates, thereby determining whether the moving coil of the vibration table is under eccentric load for a long time.

[0051] 4. The method for monitoring the connection strength between the moving coil of the vibration table and the reinforcing armor plate proposed in this invention has a low cost and the strain gauge has a relatively low cost, which has a significant cost advantage and is suitable for large-scale application and long-term monitoring. Attached image description:

[0052] Figure 1 A schematic diagram of the overall scheme for the method of monitoring the connection strength between the moving coil and the reinforcing armor plate of the invention;

[0053] Figure 2 This is a flowchart of a method for monitoring the connection strength between the moving coil and the reinforcing armor plate, which is the subject of this invention. Detailed implementation method:

[0054] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0055] This invention provides a method for monitoring the bonding state, comprising the following steps:

[0056] Step S1: Arbitrarily select a longitudinal section of the moving coil of the vibration table, and denote the longitudinal length of the moving coil under this section as L. Divide the moving coil under this section into m equal parts along the longitudinal direction. The value of m is determined by the length of the moving coil in the longitudinal direction, and the value of m ranges from 5 to 8. The distance from the bottom of the moving coil under this section is... Starting from the position, sequentially, at intervals, on the inner reinforcing armor plates below this section... m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as inner layer L. i Strain gauge, where: i = 1, 2, L, m;

[0057] The distance from the bottom of the moving coil under this cross-section Starting from the position, sequentially at intervals on the outer reinforcing armor plate below this section. m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as outer layer R. i Strain gauge, where: i = 1, 2, L, m;

[0058] At a distance l from the bottom of the moving coil in this cross-section, a standard strain gauge is placed on both the inner and outer reinforcing armor plates, denoted as L for the inner layer and L for the outer layer, respectively. s Standard strain gauge and outer R s Standard strain gauges. Because the stress on the moving coil increases sequentially upwards from the bottom along its longitudinal direction on the same cross-section, the resulting strain also increases sequentially. Therefore, the closer to the bottom of the moving coil, the lower the likelihood of debonding between the inner and outer reinforcing armor plates, and the higher the connection strength. Thus, standard strain gauges are placed on the inner and outer reinforcing armor plates at a distance *l* from the bottom of the moving coil. The value of *l* ranges from...

[0059] Step S2: Record the inner layer L during the vibration table operation in real time. i Strain gauge, outer R i Strain gauge, inner layer L s Standard strain gauge, outer R s The strain values ​​of the standard strain gauges are recorded as follows: Real-time calculation of the unit strain value of the inner reinforcing armor plate is ε L The unit strain value ε of the outer reinforcing armor plate R The calculation formula is:

[0060]

[0061] Step S3: Define the position of the inner layer L0 strain gauge as the bottom position of the inner layer moving coil, and calculate the inner layer L... i Strain gauge and inner layer L i-1The local debonding coefficient between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0062]

[0063] Define the position of the outer R0 strain gauge as the bottom position of the outer moving coil, and calculate the outer R... i Strain gauge and outer R i-1 The local debonding coefficient between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0064]

[0065] It should be noted that the stress at the bottom of the moving coil is relatively small, and the resulting strain is also small and negligible. Therefore, it can be considered that...

[0066] Step S4: Define the lower limit of the inner layer debonding coefficient as η min η min The value range is 0.1 to 0.15; the upper limit of the inner layer debonding coefficient is η. max η max The value range is 0.2 to 0.3; the lower limit of the outer layer debonding coefficient is λ. min , λ min The value range is 0.1 to 0.15; the upper limit of the outer layer debonding coefficient is λ. max , λ max The value range is 0.2 to 0.3; for different vibration tables, the stress values ​​of each strain gauge on the inner and outer reinforcing armor plates fluctuate differently during their operation, so the range of each debonding coefficient is given.

[0067] according to and The relationship between the numerical value and the upper and lower limits of the debonding coefficient between the inner and outer layers is used to determine the connection strength between the moving coil and the inner and outer reinforcing armor plates. The specific steps are as follows:

[0068] Step S41: Determine the connection strength between the inner moving coil and the reinforcing armor plate, which can be divided into three cases:

[0069] If satisfied Explanation of inner layer L i Strain gauge and inner layer L i-1 No debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength.

[0070] If satisfied Explanation of inner layer L i Strain gauge and inner layer L i-1Slight debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average.

[0071] If satisfied Explanation of inner layer L i Strain gauge and inner layer L i-1 Severe debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength;

[0072] Step S42: Determine the connection strength between the outer moving coil and the reinforcing armor plate, which can be divided into three cases:

[0073] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 No debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength.

[0074] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 Slight debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average.

[0075] If satisfied Explain the outer layer R i Strain gauge and outer R i-1 Severe debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength;

[0076] Step S5: Calculate the overall debonding coefficient μ of the inner layer. L Overall debonding coefficient of outer layer μ R The calculation formula is:

[0077]

[0078] It should be noted that the method of calculating the average value of the local debonding coefficients of the inner and outer layers by using the local debonding coefficients of the inner and outer layers respectively, and then using this average value as the overall debonding coefficient of the inner and outer layers, is relatively simple and reasonable.

[0079] Furthermore, according to μ L and μ R The relationship between the numerical value and the upper and lower limits of the debonding coefficient between the inner and outer layers is used to determine the overall connection strength between the moving coils of the inner and outer layers and the reinforcing armor plate. The specific steps are as follows:

[0080] Step S51: Determine the overall connection strength between the inner moving coil and the reinforcing armor plate, and consider the following three cases:

[0081] If 0 < μ L <ηmin This indicates that there was no detachment between the inner moving coil and the reinforcing armor plate, and the overall connection strength was high.

[0082] If η is satisfied min ≤μ L <η max This indicates that there is slight debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is average.

[0083] If μ is satisfied L ≥η max This indicates that there is severe debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is poor.

[0084] Step S52: Determine the overall connection strength between the outer moving coil and the reinforcing armor plate, which can be divided into the following three cases:

[0085] If 0 < μ R <λ min This indicates that there was no detachment between the outer moving coil and the reinforcing armor plate, and the overall connection strength was high.

[0086] If λ is satisfied min ≤μ R <λ max This indicates that there is slight debonding between the outer moving coil and the reinforcing armor plate, and the overall connection strength is average.

[0087] If μ is satisfied R ≥λ max This indicates that there is severe debonding between the outer moving coil and the reinforcing armor plate, resulting in poor overall connection strength.

[0088] Step S6: Define the upper limit of the threshold δ for the deviation of the inner and outer layer connection strength. max δ max The value range is 1.1 to 1.2; the lower limit of the inner and outer layer connection strength deviation threshold δ min δ min The value range is 0.8 to 0.9; calculate the overall debonding coefficient μ of the inner layer. L Debonding coefficient μ of the outer layer R deviation ratio δ μ The calculation formula is:

[0089]

[0090] According to the deviation ratio δ μ The relationship between the upper and lower limits of the inner and outer layer connection strength deviation threshold is used to determine whether there is a long-term off-center load during the use of the moving coil of the vibration table. The specific steps are as follows:

[0091] If δ min <δ μ <δmax This indicates that there is no off-center load on the moving coil of the vibration table during long-term use;

[0092] If δ μ ≥δ max or δ μ ≤δ min This indicates that the moving coil of the vibration table is under eccentric loading during long-term use.

[0093] If δ is satisfied min <δ μ <δ max This indicates that the connection strength between the moving coil and the inner and outer armor plates is similar, and the force conditions on both sides of the moving coil are similar, meaning that there is no eccentric load on the moving coil during long-term use; if δ is satisfied... μ ≥δ max or δ μ ≤δ min This indicates that there is a difference in the connection strength between the moving coil and the inner and outer armor plates, and the force conditions on both sides of the moving coil are different, that is, there is an off-center load on the moving coil during long-term use.

[0094] This invention also provides a vibration table moving coil and reinforcing armor plate connection strength monitoring system, including a double-layer drive coil, an inner reinforcing armor plate, an outer reinforcing armor plate, strain gauges, and an external control processing module. The double-layer drive coil is bonded to the inner and outer reinforcing armor plates respectively with epoxy resin. The strain gauges are bonded and cured to the inner and outer reinforcing armor plates with epoxy resin adhesive. Multiple strain gauges are electrically connected to the external control processing module via data lines. The external control processing module adopts the vibration table moving coil and reinforcing armor plate connection strength monitoring method described above.

[0095] 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 connection strength between the moving coil of a vibration table and a reinforcing armor plate, characterized in that, Includes the following steps: S1. Arbitrarily select a longitudinal section of the moving ring of the vibration table, and denote the longitudinal length of the moving ring under this section as L. Divide the moving ring under this section into m equal parts along the longitudinal direction, and measure the distance from the bottom of the moving ring to the section. Starting from the position, sequentially, at intervals, on the inner reinforcing armor plates below this section... m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as inner layer L. i Strain gauge, where: i = 1, 2, L, m; The distance from the bottom of the moving coil under this cross-section Starting from the position, sequentially at intervals on the outer reinforcing armor plate below this section. m strain gauges are arranged sequentially at a distance of m towards the top of the moving coil, denoted as outer layer R. i Strain gauge, where: i = 1, 2, L, m; At a distance l from the bottom of the moving coil in this cross-section, a standard strain gauge is placed on both the inner and outer reinforcing armor plates, denoted as L for the inner layer and L for the outer layer, respectively. s Standard strain gauge and outer R s Standard strain gauge; S2. Real-time recording of the inner layer L during vibration table operation. i Strain gauge, outer R i Strain gauge, inner layer L s Standard strain gauge, outer R s The strain values ​​of the standard strain gauges are recorded as follows: Real-time calculation of the unit strain value of the inner reinforcing armor plate is ε L The unit strain value ε of the outer reinforcing armor plate R The calculation formula is: S3. Define the position of the inner layer L0 strain gauge as the bottom position of the inner layer moving coil, and calculate the inner layer L... i Strain gauge and inner layer L i-1 The local debonding coefficient between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions The calculation formula is Define the position of the outer R0 strain gauge as the bottom position of the outer moving coil, and calculate the outer R... i Strain gauge and outer R i-1 The local debonding coefficient μ between the outer moving coil and the reinforcing armor plate in the corresponding region between the strain gauge positions Ri The calculation formula is: S4. Define the lower limit of the inner layer debonding coefficient as η. min The upper limit of the inner layer debonding coefficient is η max The lower limit of the outer layer debonding coefficient is λ. min The upper limit of the outer layer debonding coefficient is λ. max According to μ Li and μ Ri The relationship between the numerical value and the upper and lower limits of the debonding coefficient between the inner and outer layers is used to determine the connection strength between the moving coil and the inner and outer reinforcing armor plates. S5. Calculate the overall debonding coefficient μ of the inner layer. L Overall debonding coefficient of outer layer μ R The calculation formula is: According to μ L and μ R The relationship between the numerical value and the upper and lower limits of the debonding coefficient of the inner and outer layers is used to determine the overall connection strength between the moving coil of the inner and outer layers and the reinforcing armor plate. S6. Define the upper limit of the threshold for the deviation between the inner and outer layer connection strength δ. max Lower limit of the inner and outer layer connection strength deviation threshold δ min Calculate the overall debonding coefficient μ of the inner layer. L Debonding coefficient μ of the outer layer R deviation ratio δ μ The calculation formula is: According to the deviation ratio δ μ The relationship between the upper and lower limits of the inner and outer layer connection strength deviation threshold is used to determine whether there is a long-term off-center load during the use of the moving coil of the vibration table. The specific steps are as follows: If δ min <δ μ <δ max This indicates that there is no off-center load on the moving coil of the vibration table during long-term use; If δ μ ≥δ max or δ μ ≤δ min This indicates that the moving coil of the vibration table is under eccentric loading during long-term use.

2. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, In step S4, the specific steps for determining the connection strength between the moving coil and the inner and outer reinforcing armor plates are as follows: S41. Determine the connection strength between the inner moving coil and the reinforcing armor plate, and consider the following three cases: If 0 < μ Li <η min This indicates that the inner layer L i Strain gauge and inner layer L i-1 No debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength. If η is satisfied min ≤μ Li <η max This indicates that the inner layer L i Strain gauge and inner layer L i-1 Slight debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average. If μ is satisfied Li ≥η max This indicates that the inner layer L i Strain gauge and inner layer L i-1 Severe debonding occurred between the inner moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength; S42. Determine the connection strength between the outer moving coil and the reinforcing armor plate, and consider the following three cases: If 0 < μ Ri <λ min This indicates that the outer R i Strain gauge and outer R i-1 No debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating high connection strength. If λ is satisfied min ≤μ Ri <λ max This indicates that the outer R i Strain gauge and outer R i-1 Slight debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, and the connection strength was average. If μ is satisfied Ri ≥λ max This indicates that the outer R i Strain gauge and outer R i-1 Severe debonding occurred between the outer moving coil and the reinforcing armor plate in the corresponding area between the strain gauge positions, indicating poor connection strength.

3. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, In step S5, the specific steps for determining the overall connection strength between the inner and outer moving coils and the reinforcing armor plate are as follows: S51. Determine the overall connection strength between the inner moving coil and the reinforcing armor plate, and consider the following three cases: If 0 < μ L <η min This indicates that there was no detachment between the inner moving coil and the reinforcing armor plate, and the overall connection strength was high. If η is satisfied min ≤μ L <η max This indicates that there is slight debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is average. If μ is satisfied L ≥η max This indicates that there is severe debonding between the inner moving coil and the reinforcing armor plate, and the overall connection strength is poor. S52. Determine the overall connection strength between the outer moving coil and the reinforcing armor plate, and consider the following three cases: If 0 < μ R <λ min This indicates that there was no detachment between the outer moving coil and the reinforcing armor plate, and the overall connection strength was high. If λ is satisfied min ≤μ R <λ max This indicates that there is slight debonding between the outer moving coil and the reinforcing armor plate, and the overall connection strength is average. If μ is satisfied R ≥λ max This indicates that there is severe debonding between the outer moving coil and the reinforcing armor plate, resulting in poor overall connection strength.

4. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, The value of m, which divides the moving coil into equal parts along the longitudinal direction, ranges from 5 to 8.

5. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, Inner layer L s Standard strain gauge and outer R s The range of values ​​for the standard strain gauge distance *l* from the bottom of the moving coil is:

6. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, Lower limit η of inner layer debonding coefficient min The value range is 0.1 to 0.15, and the upper limit of the inner layer debonding coefficient η is... max The value range is 0.2 to 0.

3.

7. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, Lower limit λ of outer layer debonding coefficient min The value range is 0.1 to 0.15, and the upper limit of the outer layer debonding coefficient λ is... max The value range is 0.2 to 0.

3.

8. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, Upper limit of the inner and outer layer connection strength deviation threshold δ max The value range is 1.1 to 1.

2.

9. The method for monitoring the connection strength between the moving coil of a vibration table and the reinforcing armor plate according to claim 1, characterized in that, Lower limit δ of inner and outer layer connection strength deviation threshold min The value range is 0.8 to 0.

9.

10. A vibration table moving coil and reinforcing armor plate connection strength monitoring system, comprising a double-layer drive coil, an inner reinforcing armor plate, an outer reinforcing armor plate, strain gauges, and an external control processing module, wherein the double-layer drive coil is bonded to the inner and outer reinforcing armor plates respectively with epoxy resin, and the strain gauges are bonded and cured to the inner and outer reinforcing armor plates with epoxy resin adhesive, and multiple strain gauges are electrically connected to the external control processing module via data lines, characterized in that... The external control processing module adopts a method for monitoring the connection strength between the moving coil of the vibration table and the reinforcing armor plate as described in any one of claims 1 to 9.

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