Method and system for monitoring connection strength of moving coil and reinforced armor plate of vibrating table

Abstract

The invention discloses a method and system for monitoring the connection strength of a vibrating table moving coil and a reinforced armor plate, and the method comprises the steps: longitudinally and uniformly arranging a plurality of strain gauges and standard strain gauges on any section of the vibrating table moving coil along the inner and outer reinforced armor plates of the moving coil; the local debonding coefficient and the overall debonding coefficient between the inner-layer moving coil and the outer-layer moving coil and the reinforced armor plate are calculated on line in real time by using the numerical value of the strain gauge measured on line, the debonding degree between the inner-layer moving coil and the outer-layer moving coil and the reinforced armor plate is judged so as to monitor the connection strength, and meanwhile, an explanation whether the moving coil bears unbalance loading for a long time or not is given. According to the invention, online dynamic monitoring of the connection strength between the vibrating table moving coil and the reinforced armor plate can be realized, online evaluation of the use performance of the vibrating table moving coil can be realized, and the use reliability and safety of key parts of the vibrating table are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration tables, and in particular to a method and system for monitoring the connection strength between a vibration table moving coil and a reinforced armor plate. Background Art

[0002] In today's cutting-edge scientific exploration and rigorous engineering practice scenarios, electric vibration tables have become indispensable core experimental equipment in various fields, especially various types of high-thrust vibration tables. With their powerful driving force, they can accurately reproduce extremely complex vibration scenarios, providing reliable technical support for vibration durability tests of large components such as aerospace vehicles. As the core component of the electric vibration table, the dynamic coil drives the dynamic coil to move under the action of alternating current, thereby driving the vibration table surface to produce a precisely set vibration waveform. The dynamic coil is mainly composed of enameled wires bonded together with epoxy resin glue, and its performance plays a decisive role in the overall performance of the vibration table. In order to enhance the strength of the dynamic coil, the inner and outer sides of the dynamic coil are generally reinforced by bonding epoxy resin glue and reinforced carbon fiber armor plates.

[0003] When testing large test pieces in actual projects, high-thrust vibration tables often need to run continuously for a long time and withstand extreme vibration and impact loads. As a result, the bonding parts between the dynamic coil and the reinforced armor plate are continuously subjected to high-intensity vibration and impact loads. In addition, due to the complex alternating effect of the dynamic coil's operating temperature, the bonding connection performance between the dynamic coil and the reinforced armor plate gradually deteriorates over time. However, there is currently a general lack of methods that can monitor the connection strength of the dynamic coil and the reinforced armor plate in real time, resulting in the inability to accurately know the connection status between the dynamic coil and the reinforced armor plate during the long-term heavy-load test of the vibration table, affecting the output stability of the dynamic coil. At the same time, since the slight debonding between the dynamic coil and the armor plate in the early stage cannot be known, it often leads to the dynamic coil being unable to be repaired in time when there is a hidden danger of reduced connection strength. The subsequent heavy-load excitation operation will further increase the degree of debonding between the dynamic coil and the reinforced armor plate, which will cause debonding damage between the dynamic coil drive coil, and even cause irreversible physical damage to the mechanical structure of the vibration table, causing significant economic losses. Summary of the invention

[0004] In view of the above technical problems, the present invention proposes a method for monitoring the connection strength between a vibration table moving coil and a reinforced armor plate, comprising the following steps:

[0005] Step S1, randomly select a longitudinal section of the dynamic coil of the vibration table, record the longitudinal length of the dynamic coil under the section as L, divide the dynamic coil under the section into m equal parts along the longitudinal direction, and calculate the length from the bottom of the dynamic coil to the bottom of the dynamic coil. Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the inner layer L iStrain gauge, where: i = 1, 2, L, m;

[0006] The length from the bottom of the moving coil to the bottom of the section Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the outer layer R i Strain gauge, where: i = 1, 2, L, m;

[0007] At the position of length l from the bottom of the moving coil under the section, a standard strain gauge is arranged on the inner layer reinforcement armor plate and the outer layer reinforcement armor plate, respectively, and is recorded as inner layer L s Standard strain gauge and outer layer R s Standard strain gauges.

[0008] Step S2: Real-time recording of the inner layer L during the operation of the vibration table i Strain gauge, outer layer R i Strain gauge, inner layer L s Standard strain gauge, outer layer R s The strain value of the standard strain gauge is recorded as Real-time calculation of the unit strain value of the inner reinforced armor plate is ε L 、Unit strain value of outer reinforced armor plate ε 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 Local debonding coefficient between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0011]

[0012] Define the outer layer R0 strain gauge position as the outer layer moving coil bottom position, calculate the outer layer R i Strain gauge and outer layer R i-1 Local debonding coefficient between the outer layer dynamic coil and the reinforced 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 min, the upper limit of the outer layer debonding coefficient is λ max ,according to and The relationship between the value and the upper and lower limits of the inner and outer layer debonding coefficient is used to determine the connection strength between the dynamic coil and the inner and outer layer reinforced armor plates;

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

[0016]

[0017] According to μ L and μ R The relationship between the value and the upper and lower limits of the inner and outer layer debonding coefficient is used to determine the overall connection strength between the inner and outer layer dynamic coils and the reinforced armor plate;

[0018] Step S6: define the upper limit of the inner and outer layer connection strength deviation threshold δ max , the 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 Overall debonding coefficient with outer layer μ R The 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 the vibration table dynamic coil has long-term eccentric load during use. The specific steps are as follows:

[0021] If δ min <δ μ <δ max , indicating that there is no eccentric load on the dynamic coil of the vibration table during long-term use;

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

[0023] Furthermore, in step S4, the specific steps of judging the connection strength between the dynamic coil and the inner and outer reinforced armor plates are as follows:

[0024] Step S41: judging the connection strength between the inner layer dynamic coil and the reinforced armor plate, which is divided into the following three cases:

[0025] If satisfied Description Inner layer L i Strain gauge and inner layer Li-1 There is no debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high;

[0026] If satisfied Description Inner layer L i Strain gauge and inner layer L i-1 There is slight debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average;

[0027] If satisfied Description Inner layer L i Strain gauge and inner layer L i-1 There is severe debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor;

[0028] Step S42: judging the connection strength between the outer layer dynamic coil and the reinforced armor plate, which is divided into the following three cases:

[0029] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is no debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high;

[0030] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is slight debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average;

[0031] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is severe debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor;

[0032] Further, in step S5, the specific steps of judging the overall connection strength between the inner and outer layer dynamic coils and the reinforced armor plate are as follows:

[0033] Step S51: judging the overall connection strength between the inner layer dynamic coil and the reinforced armor plate, which is divided into the following three situations:

[0034] If 0<μ L <η min , indicating that there is no debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is high;

[0035] If η is satisfied min ≤μ L <η max, indicating that there is slight debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is average;

[0036] If μ is satisfied L ≥η max , indicating that there is severe debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is poor;

[0037] Step S52: judging the overall connection strength between the outer layer dynamic coil and the reinforced armor plate, which is divided into the following three situations:

[0038] If 0<μ R <λ min , indicating that there is no debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is high;

[0039] If λ is satisfied min ≤μ R <λ max , indicating that there is slight debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is average;

[0040] If μ is satisfied R ≥λ max , indicating that there is severe debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is poor.

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

[0042] Preferably, the inner layer L s Standard strain gauge and outer layer R s The range of the length l of the standard strain gauge from the bottom of the moving coil is

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

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

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

[0046] The present invention further discloses a vibration table dynamic coil and reinforced armor plate connection strength monitoring system, comprising a double-layer drive coil, an inner layer reinforced armor plate, an outer layer reinforced armor plate, a strain gauge, and an external control processing module. The double-layer drive coil is bonded to the inner layer reinforced armor plate and the outer layer reinforced armor plate respectively through epoxy resin, and the strain gauge is bonded and cured on the inner layer reinforced armor plate and the outer layer reinforced armor plate through epoxy resin glue. A plurality of strain gauges are electrically connected to the external control processing module through data lines, and the external control processing module adopts the vibration table dynamic coil and reinforced armor plate connection strength monitoring method.

[0047] Beneficial effects:

[0048] 1. The method for monitoring the connection strength between the dynamic coil and the reinforced armor plate of the vibration table proposed in the present invention can realize effective connection strength detection, and can detect when slight debonding occurs between the dynamic coil and the inner and outer reinforced armor plates, thereby realizing early warning to prevent the debonding from further aggravating the damage to the dynamic coil and causing serious damage to the instrument and equipment.

[0049] 2. The method for monitoring the connection strength between the dynamic coil and the reinforced armor plate of the vibration table proposed in the present invention can specifically determine the specific area of ​​debonding between the dynamic coil and the inner and outer layers of reinforced armor plates and the degree of debonding in the area, thereby obtaining the connection strength information between the dynamic coil and the inner and outer layers of reinforced armor plates.

[0050] 3. The method for monitoring the connection strength between the dynamic coil and the reinforced armor plate of the vibration table proposed in the present invention can not only obtain the local debonding degree between the dynamic coil and the inner and outer layers of the reinforced armor plates, but also obtain the overall debonding degree between the dynamic coil and the inner and outer layers of the reinforced armor plates, thereby determining whether the dynamic coil of the vibration table is in an eccentric load stress state for a long time.

[0051] 4. The method for monitoring the connection strength between the dynamic coil of the vibration table and the reinforced armor plate proposed in the present invention has low cost, and the cost of the strain gauge is relatively low, which has obvious cost advantages and is suitable for large-scale applications and long-term monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the overall scheme of the invented method for monitoring the connection strength between the moving coil and the reinforced armor plate;

[0053] Figure 2 The present invention is a flow chart of the method for monitoring the connection strength between the moving coil and the reinforced armor plate. DETAILED DESCRIPTION

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

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

[0056] Step S1, randomly select a longitudinal section of the dynamic coil of the vibration table, record the longitudinal length of the dynamic coil under the section as L, divide the dynamic coil under the section into m equal parts along the longitudinal direction, the value of m is determined by the longitudinal length of the dynamic coil, the value range of m is 5-8, and the length from the bottom of the dynamic coil under the section is Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the inner layer L i Strain gauge, where: i = 1, 2, L, m;

[0057] The length from the bottom of the moving coil to the bottom of the section Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the outer layer R i Strain gauge, where: i = 1, 2, L, m;

[0058] At the position of length l from the bottom of the moving coil under the section, a standard strain gauge is arranged on the inner layer reinforcement armor plate and the outer layer reinforcement armor plate, respectively, and is recorded as inner layer L s Standard strain gauge and outer layer R s Standard strain gauge. Since the stress on each position of the moving coil increases from the bottom of the moving coil upward along its longitudinal direction on the same section of the moving coil, the strain generated also increases. Therefore, the closer to the bottom of the moving coil, the smaller the possibility of debonding between the inner and outer layers of the reinforced armor plates, and the higher the connection strength, so the standard strain gauge is arranged on the inner and outer layers of the reinforced armor plates corresponding to the position l away from the bottom of the moving coil. The value range of l is

[0059] Step S2: Real-time recording of the inner layer L during the operation of the vibration table i Strain gauge, outer layer R i Strain gauge, inner layer L s Standard strain gauge, outer layer R s The strain value of the standard strain gauge is recorded as Real-time calculation of the unit strain value of the inner reinforced armor plate is ε L 、Unit strain value of outer reinforced armor plate ε 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-1Local debonding coefficient between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions The calculation formula is

[0062]

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

[0064]

[0065] It should be noted that the stress on the bottom of the dynamic coil is small, and the resulting strain is also small and can be ignored. 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 0.1~0.15; the upper limit of the inner layer debonding coefficient is η max , η max The value range of is 0.2~0.3; the lower limit of the outer layer debonding coefficient is λ min ,λ min The value range is 0.1~0.15; the upper limit of the outer layer debonding coefficient is λ max ,λ max The value range is 0.2~0.3; for different vibration tables, during their operation, the fluctuation of stress values ​​of each strain gauge on the inner and outer reinforced armor plates is different, so the range of variation of each debonding coefficient is given;

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

[0068] Step S41: judging the connection strength between the inner layer dynamic coil and the reinforced armor plate, which is divided into the following three cases:

[0069] If satisfied Description Inner layer L i Strain gauge and inner layer L i-1 There is no debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high;

[0070] If satisfied Description Inner layer L i Strain gauge and inner layer L i-1There is slight debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average;

[0071] If satisfied Description Inner layer L i Strain gauge and inner layer L i-1 There is severe debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor;

[0072] Step S42: judging the connection strength between the outer layer dynamic coil and the reinforced armor plate, which is divided into the following three cases:

[0073] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is no debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high;

[0074] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is slight debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average;

[0075] If satisfied Description Outer R i Strain gauge and outer layer R i-1 There is severe debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor;

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

[0077]

[0078] It should be noted that the average values ​​of the local debonding coefficients of the inner layer and the outer layer are calculated using the local debonding coefficients of the inner layer and the outer layer respectively, and the average values ​​are used as the overall debonding coefficient of the inner and outer layers. This method is relatively simple and reasonable.

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

[0080] Step S51: judging the overall connection strength between the inner layer dynamic coil and the reinforced armor plate, which is divided into the following three situations:

[0081] If 0<μ L <ηmin , indicating that there is no debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is high;

[0082] If η is satisfied min ≤μ L <η max , indicating that there is slight debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is average;

[0083] If μ is satisfied L ≥η max , indicating that there is severe debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is poor;

[0084] Step S52: judging the overall connection strength between the outer layer dynamic coil and the reinforced armor plate, which is divided into the following three situations:

[0085] If 0<μ R <λ min , indicating that there is no debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is high;

[0086] If λ is satisfied min ≤μ R <λ max , indicating that there is slight debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is average;

[0087] If μ is satisfied R ≥λ max , indicating that there is severe debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is poor.

[0088] Step S6: define the upper limit of the inner and outer layer connection strength deviation threshold δ max , δ max The value range of is 1.1~1.2; the lower limit of the inner and outer layer connection strength deviation threshold δ min , δ min The value range of is 0.8~0.9; calculate the overall debonding coefficient μ of the inner layer L Overall debonding coefficient with outer layer μ R The 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 the vibration table dynamic coil has long-term eccentric load during use. The specific steps are as follows:

[0091] If δ min <δ μ <δmax , indicating that there is no eccentric load on the dynamic coil of the vibration table during long-term use;

[0092] If δ μ ≥δ max or δ μ ≤δ min , indicating that the dynamic coil of the vibration table has an eccentric load during long-term use;

[0093] If δ is satisfied min <δ μ <δ max , indicating that the connection strength between the dynamic coil and the inner and outer armor plates is similar, and the forces on both sides of the dynamic coil are similar, that is, there is no unbalanced load in the dynamic 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 dynamic coil and the inner and outer layers of armor plates, and the force conditions on both sides of the dynamic coil are different, that is, there is an unbalanced load on the dynamic coil during long-term use.

[0094] The present invention also provides a vibration table dynamic coil and reinforced armor plate connection strength monitoring system, including a double-layer drive coil, an inner layer reinforced armor plate, an outer layer reinforced armor plate, a strain gauge, and an external control processing module. The double-layer drive coil is bonded to the inner layer reinforced armor plate and the outer layer reinforced armor plate respectively through epoxy resin, and the strain gauge is bonded and cured on the inner layer reinforced armor plate and the outer layer reinforced armor plate through epoxy resin glue. A plurality of strain gauges are electrically connected to the external control processing module through data lines, and the external control processing module adopts the vibration table dynamic coil and reinforced armor plate connection strength monitoring method.

[0095] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Various changes that can be made within the knowledge scope of technicians in the relevant technical field 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 a vibration table moving coil and a reinforced armor plate, characterized in that: The following steps are involved: S1. Randomly select a longitudinal section of the dynamic coil of the vibration table, record the longitudinal length of the dynamic coil under the section as L, divide the dynamic coil under the section into m equal parts along the longitudinal direction, and calculate the length from the bottom of the dynamic coil to the bottom of the dynamic coil. Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the inner layer L i Strain gauge, where: i = 1, 2, L, m; The length from the bottom of the moving coil to the bottom of the section Starting from the position of m strain gauges are arranged in sequence toward the top of the moving coil, and are respectively denoted as the outer layer R i Strain gauge, where: i = 1, 2, L, m; At the position of length l from the bottom of the moving coil under the section, a standard strain gauge is arranged on the inner layer reinforcement armor plate and the outer layer reinforcement armor plate, respectively, and is recorded as inner layer L s Standard strain gauge and outer layer R s Standard strain gauges; S2, real-time recording of the inner layer L during the operation of the vibration table i Strain gauge, outer layer R i Strain gauge, inner layer L s Standard strain gauge, outer layer R s The strain value of the standard strain gauge is recorded as Real-time calculation of the unit strain value of the inner reinforced armor plate is ε L 、Unit strain value of outer reinforced armor plate ε R , the calculation formula is S3, define the inner layer L0 strain gauge position as the bottom position of the inner layer moving coil, calculate the inner layer L i Strain gauge and inner layer L i-1 Local debonding coefficient between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions The calculation formula is Define the outer layer R0 strain gauge position as the outer layer moving coil bottom position, calculate the outer layer R i Strain gauge and outer layer R i-1 The local debonding coefficient μ between the outer layer dynamic coil and the reinforced armor plate in the corresponding area 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 value and the upper and lower limits of the inner and outer layer debonding coefficient is used to determine the connection strength between the dynamic coil and the inner and outer layer reinforced armor plates; S5. Calculate the overall debonding coefficient μ of the inner layer L , the overall debonding coefficient of the outer layer μ R , the calculation formula is According to μ L and μ R The relationship between the value and the upper and lower limits of the inner and outer layer debonding coefficient is used to determine the overall connection strength between the inner and outer layer dynamic coils and the reinforced armor plate; S6. Define the upper limit of the inner and outer layer connection strength deviation threshold δ max , the 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 Overall debonding coefficient with outer layer μ R The 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 the vibration table dynamic coil has long-term eccentric load during use. The specific steps are as follows: If δ min <δ μ <δ max , indicating that there is no eccentric load on the dynamic coil of the vibration table during long-term use; If δ μ ≥δ max or δ μ ≤δ min This indicates that the dynamic coil of the vibration table is overloaded during long-term use.

2. A method for monitoring the connection strength between a vibration table moving coil and a reinforced armor plate according to claim 1, characterized in that: In step S4, the specific steps of judging the connection strength between the dynamic coil and the inner and outer reinforced armor plates are as follows: S41. Determine the connection strength between the inner dynamic coil and the reinforced armor plate, which can be divided into the following three cases: If 0<μ Li <η min , indicating that the inner layer L i Strain gauge and inner layer L i-1 There is no debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high; If η is satisfied min ≤μ Li <η max , indicating that the inner layer L i Strain gauge and inner layer L i-1 There is slight debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average; If μ is satisfied Li ≥η max , indicating that the inner layer L i Strain gauge and inner layer L i-1 There is severe debonding between the inner layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor; S42. Determine the connection strength between the outer dynamic coil and the reinforced armor plate, which can be divided into the following three situations: If 0<μ Ri <λ min , indicating that the outer layer R i Strain gauge and outer layer R i-1 There is no debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is high; If λ is satisfied min ≤μ Ri <λ max , indicating that the outer layer R i Strain gauge and outer layer R i-1 There is slight debonding between the outer layer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is average; If μ is satisfied Ri ≥λ max , indicating that the outer layer R i Strain gauge and outer layer R i-1 There is severe debonding between the outer dynamic coil and the reinforced armor plate in the corresponding area between the strain gauge positions, and the connection strength is poor.

3. A method for monitoring the connection strength between a vibration table moving coil and a reinforced armor plate according to claim 1, characterized in that: In step S5, the specific steps of determining the overall connection strength between the inner and outer layer dynamic coils and the reinforced armor plate are as follows: S51. Determine the overall connection strength between the inner dynamic coil and the reinforced armor plate, which can be divided into the following three situations: If 0<μ L <η min , indicating that there is no debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is high; If η is satisfied min ≤μ L <η max , indicating that there is slight debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is average; If μ is satisfied L ≥η max , indicating that there is severe debonding between the inner dynamic coil and the reinforced armor plate, and the overall connection strength is poor; S52. Determine the overall connection strength between the outer dynamic coil and the reinforced armor plate, which can be divided into the following three situations: If 0<μ R <λ min , indicating that there is no debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is high; If λ is satisfied min ≤μ R <λ max , indicating that there is slight debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is average; If μ is satisfied R ≥λ max , indicating that there is severe debonding between the outer dynamic coil and the reinforced armor plate, and the overall connection strength is poor.

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

5. The method for monitoring the connection strength between the dynamic coil and the reinforced armor plate of a vibration table according to claim 1 is characterized in that: Inner layer L s Standard strain gauge and outer layer R s The range of the length l of the standard strain gauge from the bottom of the moving coil is 6. A method for monitoring the connection strength between a vibration table moving coil and a reinforced armor plate according to claim 1, characterized in that: Lower limit of inner layer debonding coefficient η min The value range of is 0.1~0.15, and the upper limit of the inner layer debonding coefficient η max The value range is 0.2~0.

3.

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

3.

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

2.

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

9.

10. A vibration table dynamic coil and reinforced armor plate connection strength monitoring system, comprising a double-layer drive coil, an inner reinforced armor plate, an outer reinforced armor plate, a strain gauge, and an external control processing module, wherein the double-layer drive coil is bonded to the inner reinforced armor plate and the outer reinforced armor plate respectively by epoxy resin, and the strain gauge is bonded and cured on the inner reinforced armor plate and the outer reinforced armor plate by epoxy resin glue, and a plurality of the strain gauges are electrically connected to the external control processing module by data lines, characterized in that: The external control processing module adopts a method for monitoring the connection strength between the dynamic coil and the reinforced armor plate of a vibration table as described in any one of claims 1 to 9.

Images