Device and method for monitoring counter force of support in real time

Abstract

The invention discloses a real-time monitoring device and method for the counter-force of a support. The monitoring device comprises a support cushion box, a deformation monitoring device and a processor. The support cushion box comprises a top plate, a bottom plate and a plurality of cylindrical rubber pads; the deformation monitoring module comprises sliding rails and a laser projection panel which are arranged in pairs, and further comprises a laser transmitter, a driving mechanism and a data acquisition and transmission device. According to the real-time monitoring device for the counter-force of the support, a plurality of rubber pads which are arranged at intervals jointly bear a vertical load, a laser transmitter is arranged on one side of each rubber pad and transmits laser rays, a laser projection panel is arranged on the other side of each rubber pad and collects the laser rays which are not shielded by the rubber pads, and therefore the diameter of the compressed rubber pads can be obtained; then the vertical load Ni borne by each rubber pad and the total vertical load N of the whole support cushion box are directly calculated through a preset formula in the processor, and therefore the difference of the vertical loads in all the areas can be monitored, and a basis can be provided for follow-up safety and stability evaluation.

Description

TECHNICAL FIELD

[0001] The application relates to a support reaction force real-time monitoring device and method, and belongs to the civil engineering field. BACKGROUND

[0002] In the civil engineering field, the support position of a large structure, the support leg structure of a large hoisting device, the bottom fixing component of a construction temporary support system and the like all involve the use of support components, and effective real-time distribution data of the support internal force can provide key parameters for the overall mechanical performance and stability evaluation of the structure.

[0003] At present, for the support internal force of some large structures, some methods such as installing pressure sensors, displacement meters and the like in the support are used for conversion, the sensor arrangement is relatively complicated and is prone to failure, and once damaged, it is difficult to recover; for some large hoisting device support leg structures using hydraulic lifting, the readings of the hydraulic cylinders can also be used for approximate calculation. In the prior art, it is difficult to master the actual distribution of the support reaction force, and only the axial force can be monitored, and the eccentric force characteristics of the support cannot be obtained. For a large number of and generally existing ordinary support leg structures, to judge the overall stability, not only the force distribution of each support should be grasped, but also the eccentric force characteristics of each support are important. SUMMARY

[0004] The application provides a support reaction force real-time monitoring device and method, which can calculate the vertical load borne by each rubber pad and the overall vertical load borne by all rubber pads by monitoring the diameters of the deformed rubber pads, and can reflect the eccentric force characteristics of the support by the differences in the loads acting on the rubber pads.

[0005] To solve the above technical problems, the application comprises the following technical solutions:

[0006] A support reaction force real-time monitoring device comprises a support pad box, a deformation monitoring device and a processor.

[0007] The support pad box comprises a top plate, a bottom plate and S rows of parallelly arranged cylindrical rubber pads between the top plate and the bottom plate, and lubricating materials are arranged between the rubber pads and the top plate and the bottom plate.

[0008] The deformation monitoring module comprises pairs of sliding rails and laser projection panels, S pairs in total, the sliding rails and the laser projection panels being arranged in parallel and at intervals and located on both sides of the rubber pads in the same row; the deformation monitoring module further comprises laser emitters, a driving mechanism and a data acquisition and transmission device, each sliding rail is provided with a laser emitter, the driving mechanism can drive the laser emitters to move along the sliding rails, the laser projection panels are provided with light sensing elements capable of sensing laser lines, the light sensing elements can monitor the laser lines passing through the gaps of the rubber pads, and the data acquisition and transmission device can acquire light sensing data on the light sensing elements and send the light sensing data to a processor;

[0009] The processor can obtain the diameter D1 of the rubber pad according to the received light sensing data, and calculate the vertical load N acting on the i-th rubber pad i and the total vertical load N acting on the support pad box; wherein,

[0010]

[0011] N = ∑N i ;

[0012] In the formula, D i0 is the initial diameter of the i-th rubber pad, D i1 is the measured diameter of the i-th rubber pad calculated by the processor, μ is the Poisson's ratio of the rubber pad, and E is the elastic modulus of the rubber pad.

[0013] Further, the center point of the area on the bottom plate where the rubber pads are arranged is taken as the origin of the coordinate system, the direction of the row where the rubber pads are arranged is taken as the x-axis direction, and the direction perpendicular to the x-axis in the plane is taken as the y-axis direction to establish a two-dimensional coordinate system in the plane;

[0014] The processor can calculate the eccentricity e x , e y of the vertical load N and the bending moment M x around the y-axis, the bending moment M y around the x-axis, wherein:

[0015] e x = ∑N i ·x i / N;

[0016] e y = ∑N i ·y i / N;

[0017] M x = ∑(N i ·x i );

[0018] M y = ∑(N i ·yi );

[0019] In the formula, x i y i Let x and y be the center points of the i-th rubber pad, respectively.

[0020] Furthermore, a connecting plate is provided on one side of the support pad box, and the same end of the slide rail and the laser projection panel are fixedly connected by the connecting plate.

[0021] Furthermore, the side of the support pad box is provided with a flexible side plate, which is spliced ​​together end to end.

[0022] Furthermore, limiting grooves are provided at the top and bottom of the rubber pad, and tenons are provided at corresponding positions on the top and bottom plates, with the tenons inserted into the limiting grooves.

[0023] Accordingly, the present invention also provides a method for real-time monitoring of support reaction force, which employs the aforementioned real-time monitoring device for support reaction force, and specifically includes the following steps:

[0024] Step 1: Install a real-time support reaction force monitoring device at the bottom of the stressed component;

[0025] Step 2: Start the laser emitter. Start the drive mechanism to move the laser emitter along the slide rail. The photosensitive element monitors the laser line passing through the gap of the rubber pad. The data acquisition and transmission device collects the photosensitive data on the photosensitive element and sends the photosensitive data to the processor.

[0026] Step 3: The processor receives the light-sensing data, obtains the diameter D1 of the rubber pad, and calculates the vertical load N acting on the i-th rubber pad. i And the total vertical load N acting on the support pad box.

[0027] The present invention, by employing the above technical solution, has the following advantages and positive effects compared with the prior art: The real-time support reaction force monitoring device and method provided by the present invention uses several spaced rubber pads to jointly bear the vertical load. A laser emitter is set on one side of the rubber pads and emits a laser line, while a laser projection panel is set on the other side of the rubber pads to collect the laser line that is not blocked by the rubber pads. This allows the diameter of the rubber pads after compression to be obtained. Then, the vertical load N borne by each rubber pad is directly calculated using a formula preset in the processor. i The invention also measures the total vertical load N of the entire support pad box, thereby enabling the monitoring of differences in vertical load across different areas and providing a basis for subsequent safety and stability evaluation. In a preferred embodiment, the invention can also calculate key parameters such as the acting bending moment and eccentricity on the support pad box, which is more conducive to evaluating structural safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the support reaction real-time monitoring device in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the top plate, bottom plate, and rubber pad of the support pad box in one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of applying a vertical load to the top plate of a support pad box according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of a driving mechanism that moves a laser emitter according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the laser line received by the photosensitive element on the laser projection panel according to an embodiment of the present invention.

[0033] The numbers in the diagram are as follows:

[0034] 10-Support pad box; 11-Top plate; 12-Bottom plate; 13-Rubber pad; 14-Flexible side plate; 15-Limiting groove; 16-Dovetail; 17-Lubricating material;

[0035] 20-Deformation monitoring module; 21-Slide rail; 22-Laser projection panel; 23-Laser emitter; 24-Drive mechanism; 25-Data acquisition and transmission device; 26-Connecting plate;

[0036] 30 - Processor. Detailed Implementation

[0037] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed explanation of the real-time support reaction monitoring device and method provided by the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0038] Example 1

[0039] Combination Figure 1 and Figure 2 As shown, the real-time support reaction force monitoring device provided in this embodiment includes a support pad box 10, a deformation monitoring module 20, and a processor 30.

[0040] The support pad box 10 includes a top plate 11, a bottom plate 12, and several cylindrical rubber pads 13 arranged in parallel rows (S is a known natural number) between the top plate 11 and the bottom plate 12. The bottom plate 12 can be made of thick steel plate and can be considered a rigid structure, while the top plate 11 can be made of a material with a certain degree of flexibility, such as thin steel plate or rubber plate. The elastic modulus of the rubber pads 13 is selected as needed, and the thickness and number of the rubber pads 13 are also set as needed. A lubricating material 17 is provided between the rubber pads 13 and the top plate 11 and the bottom plate 12. For example, the lubricating material 17 can be made of polytetrafluoroethylene (PTFE). Coating PTFE on the top of the bottom plate 12 and the bottom of the top plate 11 can form a coating with an extremely low coefficient of friction. This arrangement ensures that after the rubber pads 13 are compressed, the top and bottom ends of the rubber pads 13 are almost unrestrained by the top plate 11 and the bottom plate 12, and the deformation of the rubber pads 13 is more uniform.

[0041] Combination Figures 1 to 3 As shown, when a vertical load is applied to the top plate 11, the rubber pad 13 will be compressed and deformed. For example, if the initial height of a rubber pad 13 is H0 and the initial diameter is D0, and the height after compression is H1 and the diameter is D1, the height difference before and after compression is ΔH and the diameter difference is ΔD, satisfying: ΔH = H0 - H1, ΔD = D1 - D0. Utilizing the significant Poisson effect of rubber material after compression deformation, by accurately measuring the lateral diameter change ΔD of the rubber pad 13, the vertical height change ΔH can be directly calculated based on the principles of material mechanics, satisfying:

[0042]

[0043] In the formula, μ is the Poisson's ratio of the rubber pad.

[0044] The vertical load N acting on the rubber pad 13 can then be calculated. i ,in:

[0045]

[0046] in Substitute A and ΔH into N. i After obtaining the calculation formula, N can be calculated. i .

[0047] In the formula, E is the elastic modulus of the rubber pad 13.

[0048] Of course, if the rubber pad 13 is considered to have a constant volume, it can also be assumed that the volume before and after compression is the same. By accurately measuring the D1 of the rubber pad 13 after compression, the height H1 after compression can be calculated, and the change in height ΔH before and after compression can be calculated using the formula. Calculate the vertical load N acting on the rubber pad 13. i .

[0049] Combination Figures 1 to 5 As shown, the deformation monitoring module 20 and processor 30 are used to obtain the diameter D1 of the compressed rubber pad 13. Specifically, the deformation monitoring module 20 includes paired slide rails 21 and laser projection panels 22, with S pairs of slide rails 21 and laser projection panels 22 arranged parallel and spaced apart, located on both sides of the rubber pads 13 in the same row. The deformation monitoring module 20 also includes a laser emitter 23, a drive mechanism 24, and a data acquisition and transmission device 25. Each slide rail 21 is equipped with a laser emitter 23, and the drive mechanism 24 can drive the laser emitter 23 to move along the slide rail 21. The laser projection panel 22 is equipped with a photosensitive element that can sense laser lines. The photosensitive element can detect laser lines passing through the gaps in the rubber pads 13. The data acquisition and transmission device 25 can collect the photosensitive data from the photosensitive element and send the photosensitive data to the processor 30. The processor can obtain the diameter D1 of the rubber pad 13 based on the received photosensitive data. Figure 4 As shown, the laser emitter 23 continuously emits laser lines during its movement. The portion of the laser line not blocked by the rubber pad 13 can be detected by the light-sensing components on the laser projection panel 22, while the portion blocked by the rubber pad 13 will not be detected by the light-sensing components on the laser projection panel 22. Figure 5 In the middle, several photosensitive lines are formed on the laser projection panel 22, and the distance between two adjacent photosensitive lines is D1.

[0050] Based on the diameter D1 of the rubber pad 13, the processor 30 calculates the vertical load N acting on the i-th rubber pad 13. i and the total vertical load N acting on the support pad 10; where,

[0051]

[0052] N=∑N i ;

[0053] In the formula D i0 Let D be the initial diameter of the i-th rubber pad 13. i1 The measured diameter of the i-th rubber pad 13 is calculated by the processor 30, μ is the Poisson's ratio of the rubber pad 13, and E is the elastic modulus of the rubber pad 13; if the number of rubber pads 13 is T, then i = 1, 2, ..., T.

[0054] In one specific embodiment, a two-dimensional coordinate system is established with the center point of the area on the base plate 12 where the rubber pads 13 are set as the origin of the coordinate system, the direction of the row of rubber pads 13 as the x-axis, and the direction perpendicular to the x-axis in the plane as the y-axis. If the rubber pads 13 are evenly distributed on the base plate 12, the center point of the base plate 12 can also be used as the origin of the coordinate system. The processor 30 can calculate the eccentricity e of the vertical load N. x e y and the bending moment M about the y-axis x Bending moment M about the x-axis y ,in:

[0055] e x =∑N i ·x i / N;

[0056] e y =∑N i ·y i / N;

[0057] M x =∑(N i ·x i );

[0058] M y =∑(N i ·y i );

[0059] In the formula, x i y i Let x and y be the center points of the i-th rubber pad 13, respectively.

[0060] Therefore, this embodiment can accurately obtain the bending moment and eccentricity of the vertical load on the support pad box.

[0061] In one specific embodiment, a connecting plate 26 is provided on one side of the support pad box 10, and the same end of the slide rail 21 and the laser projection panel 22 are fixedly connected by the connecting plate 26. In the event of a malfunction such as damage to the laser emitter 23, the laser projection panel 22, or the guide rail, the connecting plate 26 can be directly removed to repair or replace the slide rail 21, the laser projection panel 22, or the laser emitter 23. Furthermore, the drive mechanism 24 is fixed to one end of the slide rail 21, and the data acquisition and transmission device 25 is located at the other end of the slide rail 21. This arrangement allows the deformation monitoring module 20 to be formed as a single unit, and removing the connecting plate 26 allows the entire deformation monitoring module 20 to be removed, facilitating repair or replacement.

[0062] In one specific embodiment, flexible side plates 14 are provided on all four sides of the support pad box 10, and the flexible side plates 14 are spliced ​​together end to end. In this embodiment, the flexible side plates 14 can form a sealed structure, protecting the deformation monitoring module 20 from the influence of moisture, dust, etc. in the environment. Furthermore, the flexible side plates do not bear the vertical load on the top plate 11, thus not affecting the measurement accuracy. The flexible side plates 14 are also easy to disassemble, without affecting the maintenance of the deformation monitoring module 20.

[0063] In one specific embodiment, in order to facilitate fixing the position of the rubber pad 13, limiting grooves 15 are provided at the top and bottom of the rubber pad 13, and tenons 16 are provided at corresponding positions of the top plate 11 and the bottom plate 12. The tenons 16 are inserted into the limiting grooves 15 so that the position of the center point of the rubber pad 13 remains unchanged.

[0064] Example 2

[0065] This embodiment provides a method for real-time monitoring of support reaction force, using the real-time support reaction force monitoring device from Embodiment 1, and specifically includes the following steps:

[0066] Step 1: Install a real-time support reaction monitoring device at the bottom of the stressed component.

[0067] For example, common load-bearing components in civil engineering include structural supports, outriggers of large hoisting equipment, and bottom fixing components of large support systems, but they can also be other types of load-bearing components.

[0068] Step 2: Start the laser emitter 23 and start the drive mechanism 24 to move the laser emitter 23 along the slide rail 21. The photosensitive element monitors the laser line passing through the gap of the rubber pad 13. The data acquisition and transmission device 25 collects the photosensitive data on the photosensitive element and sends the photosensitive data to the processor 30.

[0069] Without the rubber pad 13 blocking the light, the light sensing data is a complete line segment. However, because part of the laser line is blocked by the rubber pad 13, the light sensing data consists of several light sensing line segments. The number of line segments is the number of rubber pads 13 in that row plus 1.

[0070] Step 3: The processor 30 receives the light-sensing data, obtains the diameter D1 of the rubber pad 13, and calculates the vertical load N acting on the i-th rubber pad 13. i And the total vertical load N acting on the support pad box 10.

[0071] Let D be the initial diameter and the measured diameter after compression of the i-th rubber pad 13. i0 D i1 Then we have:

[0072]

[0073] N=∑N i .

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A real-time monitoring device for support reaction force, characterized in that, Includes bearing pad box, deformation monitoring device and processor; The support pad box includes a top plate, a bottom plate, and several cylindrical rubber pads arranged in parallel in an S row between the top plate and the bottom plate. Lubricating material is provided between the rubber pads and the top plate and the bottom plate. The deformation monitoring module includes paired slide rails and laser projection panels, with a total of S pairs. The slide rails and laser projection panels are arranged in parallel and spaced apart, and are located on both sides of the same row of rubber pads. The deformation monitoring module also includes a laser emitter, a drive mechanism, and a data acquisition and transmission device. Each slide rail is equipped with a laser emitter, and the drive mechanism can drive the laser emitter to move along the slide rail. The laser projection panel is equipped with a photosensitive element that can sense laser lines. The photosensitive element can detect laser lines passing through the gaps in the rubber pads. The data acquisition and transmission device can collect the photosensitive data on the photosensitive element and send the photosensitive data to the processor. The processor can obtain the diameter D1 of the rubber pad based on the received light-sensing data, and calculate the vertical load N acting on the i-th rubber pad. i and the total vertical load N acting on the support pad box; where, N=∑N i ; In the formula D i0 Let D be the initial diameter of the i-th rubber pad. i1 Let μ be the measured diameter of the i-th rubber pad calculated by the processor, μ be the Poisson's ratio of the rubber pad, and E be the elastic modulus of the rubber pad.

2. The real-time support reaction force monitoring device as described in claim 1, characterized in that, A two-dimensional coordinate system is established with the center point of the area where the rubber pads are set on the base plate as the origin of the coordinate system, the direction of the row where the rubber pads are located as the x-axis direction, and the direction perpendicular to the x-axis in the plane as the y-axis direction. The processor can calculate the eccentricity e of the vertical load N. x e y and the bending moment M about the y-axis x Bending moment M about the x-axis y ,in: e x =∑N i ·x i / N; and y =∑N i ·and i / N; M x =∑(N i ·x i ); M y =∑(N i ·y i ); In the formula, x i y i Let x and y be the center points of the i-th rubber pad, respectively.

3. The real-time support reaction force monitoring device as described in claim 1, characterized in that, A connecting plate is provided on one side of the support pad box, and the same end of the slide rail and the laser projection panel are fixedly connected by the connecting plate.

4. The real-time support reaction force monitoring device as described in claim 1, characterized in that, The side of the support pad box is provided with a flexible side plate, which is spliced ​​together end to end.

5. The real-time support reaction force monitoring device as described in claim 1, characterized in that, Limiting grooves are provided at the top and bottom of the rubber pad, and tenons are provided at corresponding positions on the top and bottom plates, with the tenons inserted into the limiting grooves.

6. A method for real-time monitoring of support reaction force, characterized in that, The real-time support reaction force monitoring device as described in any one of claims 1 to 5 specifically includes the following steps: Step 1: Install a real-time support reaction force monitoring device at the bottom of the stressed component; Step 2: Start the laser emitter. Start the drive mechanism to move the laser emitter along the slide rail. The photosensitive element monitors the laser line passing through the gap of the rubber pad. The data acquisition and transmission device collects the photosensitive data on the photosensitive element and sends the photosensitive data to the processor. Step 3: The processor receives the light-sensing data, obtains the diameter D1 of the rubber pad, and calculates the vertical load N acting on the i-th rubber pad. i And the total vertical load N acting on the support pad box.

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