Structural damage monitoring device suitable for bearing platform

Abstract

The utility model relates to a structural damage monitoring device suitable for a bearing platform. The deformation sensing module comprises a pressure sensor and a deformation sensing unit, and the pressure sensor is attached to the bearing area of the bearing surface of the bearing platform; the deformation sensing unit at least comprises two deformation sensors used for deformation monitoring, one deformation sensor is attached to the bearing surface of the bearing platform, the other deformation sensor is attached to the bearing back surface of the bearing platform, and the bearing back surface and the bearing surface are two corresponding surfaces of the bearing platform; the pressure sensor and the deformation sensing unit are prepared on the same monitoring substrate at least based on silk-screen printing, and when structural damage monitoring is conducted on the bearing platform, the two deformation sensors in the deformation sensing unit are connected to form a half-bridge circuit. According to the utility model, the structure damage monitoring of the bearing platform can be effectively realized, and the reliability and the monitoring precision of the structure damage monitoring are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a monitoring device, especially a structural damage monitoring device suitable for a bearing platform. BACKGROUND

[0002] At present, when detecting defects of parts, X spectrum analysis is generally adopted. When determining the defect state of the part by adopting X spectrum analysis, the following disadvantages exist: 1) inconvenience, X spectrum analysis needs large equipment, and the detection time is long; 2) danger, X spectrum analysis has health risks to operators; 3) limitation, X spectrum analysis can only detect the parts in a static state, and cannot detect the structural health state of the parts in operation.

[0003] The bearing platform is generally used for supporting loads. Since the weight of the load is large, it is necessary to monitor the structural damage of the bearing platform. Since the weight of the bearing platform is large, the corresponding X spectrum is not easy to obtain. Therefore, how to effectively realize the structural damage monitoring of the bearing platform is a technical problem to be solved at present. SUMMARY

[0004] The utility model discloses a kind of structural damage monitoring devices suitable for bearing platform, which can effectively realize the structural damage monitoring of bearing platform, improve the reliability and monitoring precision of structural damage monitoring.

[0005] According to the technical scheme provided by the utility model, a structural damage monitoring device suitable for bearing platform can be attached to the bearing platform, and at least includes a pressure sensor and a deformation sensing unit, wherein,

[0006] The pressure sensor is attached to the bearing area of the bearing surface of the bearing platform.

[0007] The deformation sensing unit includes at least two deformation sensors for deformation monitoring, wherein one deformation sensor is attached to the bearing surface of the bearing platform, and one deformation sensor is attached to the bearing back surface of the bearing platform. The bearing back surface and the bearing surface are two corresponding surfaces of the bearing platform.

[0008] The pressure sensor and the deformation sensing unit are prepared on the same monitoring substrate based on silk screen printing, wherein when the structural damage of the bearing platform is monitored, the two deformation sensors in the deformation sensing unit are connected into a half-bridge circuit.

[0009] The pressure sensor includes an array of pressure sensing units, wherein,

[0010] The pressure sensing units in the same row are connected to the same row of pressure sensing electrode lines, and the pressure sensing units in the same column are connected to the same column of pressure sensing electrode lines.

[0011] For each pressure sensing unit, at least a high-resistance conductive elastic block is included, wherein the high-resistance conductive elastic block is electrically connected to the row pressure sensing electrode line corresponding to the row and the column pressure sensing electrode line corresponding to the column.

[0012] The pressure sensor further comprises a monitoring and sensing insulating layer, wherein the monitoring and sensing insulating layer covers at least the arrayed pressure sensing units.

[0013] A waterproof and dustproof protective layer is arranged on the monitoring and sensing insulating layer, and the waterproof and dustproof protective layer covers the monitoring and sensing insulating layer.

[0014] The row pressure sensing electrode line and the column pressure sensing electrode line are prepared on the monitoring substrate by screen printing, wherein,

[0015] An insulating and isolating block of the sensing electrode line is further arranged on the monitoring substrate, and the row pressure sensing electrode line and the corresponding column pressure sensing electrode line are insulated and isolated by the insulating and isolating block of the sensing electrode line.

[0016] The row pressure sensing electrode line and the column pressure sensing electrode line are both silver lines.

[0017] The deformation sensor comprises a deformation sensing main body, wherein,

[0018] The deformation sensing main body comprises a plurality of mutually parallel deformation sensing lines, and adjacent deformation sensing lines are connected by arc-shaped transition connection.

[0019] When the deformation sensing unit is attached to the load-bearing platform, the length direction of the deformation sensing line is consistent with the length direction of the load-bearing platform.

[0020] The monitoring and sensing insulating layer further covers the deformation sensing main body, so as to insulate and isolate the deformation sensing lines in the deformation sensing main body by the monitoring and sensing insulating layer.

[0021] All the deformation sensing lines, the row pressure sensing electrode line and the column pressure sensing electrode line converge at the first end of the monitoring substrate, and the pressure sensor is located at the second end of the monitoring substrate, wherein,

[0022] The direction in which the first end of the monitoring substrate points to the second end of the monitoring substrate is consistent with the length direction of the monitoring substrate.

[0023] The monitoring substrate comprises a PET film, a TPU film or a PI film, wherein,

[0024] The back surface of the monitoring substrate is provided with an attachment connection layer, and the monitoring substrate is attached and fixed to the load-bearing platform by the attachment connection layer.

[0025] The attachment connection layer comprises a double-sided adhesive layer.

[0026] The advantages of this invention are as follows: A pressure sensor is attached to the load-bearing area of ​​the load-bearing surface of the load-bearing platform, and a deformation sensor is attached to the load-bearing surface of the load-bearing platform, while another deformation sensor is attached to the load-bearing back side of the load-bearing platform. When monitoring structural damage to the load-bearing platform, the two deformation sensors in the deformation sensing unit are connected to form a half-bridge circuit. By using the pressure values ​​output by the pressure sensor and the pressure values ​​output by the deformation sensing unit, structural damage monitoring of the load-bearing platform can be achieved, thus effectively realizing structural damage monitoring of the load-bearing platform and improving the reliability and accuracy of structural loss monitoring. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of the structural damage monitoring device of this utility model.

[0028] Figure 2 This is a schematic diagram of one embodiment of the pressure sensor of this utility model.

[0029] Figure 3 for Figure 2 A schematic diagram of an embodiment of the AA-direction sectional view.

[0030] Figure 4 for Figure 2 A schematic diagram of an embodiment of the BB-direction cross-sectional view.

[0031] Figure 5 This is a schematic diagram of one embodiment of the deformation sensor of this utility model.

[0032] Figure 6 for Figure 5 A schematic diagram of an embodiment of the CC-direction sectional view.

[0033] Figure 7 This is a schematic diagram of one embodiment of the structural damage monitoring device of this utility model mounted on a support platform.

[0034] Explanation of reference signs: 1-monitoring substrate, 2-pressure sensor, 3-first deformation sensor, 4-second deformation sensor, 5-first deformation sensor first connecting end, 6-first deformation sensor second connecting end, 7-pressure sensor first connecting end, 8-pressure sensor second connecting end, 9-pressure sensor third connecting end, 10-pressure sensor fourth connecting end, 11-second deformation sensor first connecting end, 12-second deformation sensor second connecting end, 13-pressure sensing unit, 14-second column pressure sensing electrode line, 15-first row pressure sensing electrode line, 16-second row pressure sensing electrode line, 17-first column pressure sensing electrode line, 18-insulating spacer for sensing electrode line, 19-pasted connecting layer, 20-waterproof and dustproof protective layer, 21-monitoring sensor insulating layer, 22-high-resistance conductive elastic block, 23-deformation sensing line, 24-arc-shaped transition zone, 25-bearing platform, 26-load, 27-deformation sensing first lead-out electrode line, 28-deformation sensing second lead-out electrode line. DETAILED DESCRIPTION

[0035] The utility model will be further explained in combination with specific drawings and examples.

[0036] In order to effectively realize the structural damage monitoring of the bearing platform 25, improve the reliability and monitoring precision of structural damage monitoring, the utility model provides a kind of structural damage monitoring device suitable for bearing platform 25, specifically, the structural damage monitoring device can be pasted on bearing platform 25, at least including pressure sensor 2 and deformation sensing unit, wherein,

[0037] Pressure sensor 2 is pasted on the bearing area of the bearing surface of bearing platform 25;

[0038] Deformation sensing unit at least includes two deformation sensors for deformation monitoring, wherein one deformation sensor is pasted on the bearing surface of bearing platform 25, and one deformation sensor is pasted on the bearing back surface of bearing platform 25, and the bearing back surface and the bearing surface are two corresponding surfaces of bearing platform 25;

[0039] Pressure sensor 2 and deformation sensing unit are prepared on the same monitoring substrate 1 at least based on silk screen printing, wherein when structural damage monitoring is carried out on bearing platform 25, two deformation sensors in deformation sensing unit are connected into half-bridge circuit.

[0040] It should be noted that the load bearing platform 25 can be a commonly used platform form, and the load bearing platform 25 generally has at least one load bearing surface, and a load bearing area is arranged on the load bearing surface, and the load 26 can be placed on the load bearing area to realize the load bearing support of the load 26. In order to be able to monitor the structural damage of the load bearing platform 25, the structural damage monitoring device of the utility model should be attached to the load bearing platform 25, and then the structural damage monitoring of the load bearing platform 25 can be realized, as shown in Figure 7 .

[0041] In order to realize the structural damage monitoring of the load bearing platform 25, the structural damage monitoring device at least includes a pressure sensor 2 and a deformation sensing unit, the pressure sensor 2 should be attached to the load bearing area, and then when the load bearing platform 25 is loaded, the load 26 should be placed on the pressure sensor 2, as shown in Figure 7 . The deformation sensing unit at least includes two deformation sensors, and generally, the deformation sensing unit can be formed based on the two deformation sensors, Figure 1 and Figure 7 An embodiment for forming the deformation sensing unit by using two deformation sensors is shown in the figure, and the two deformation sensors are respectively a first deformation sensor 3 and a second deformation sensor 4, wherein the first deformation sensor 3 and the second deformation sensor 4 can be used to monitor the deformation of the load bearing platform 25.

[0042] In specific implementation, one deformation sensor should be attached to the load bearing surface, and the other deformation sensor should be attached to the load bearing back surface of the load bearing platform 25, and generally, the load bearing back surface is the non-load bearing surface of the load bearing platform 25, and the load bearing back surface is in direct correspondence with the load bearing surface, as shown in Figure 7 . Figure 7 In the figure, the first deformation sensor 3 is placed on the load bearing surface of the load bearing platform 25, and the second deformation sensor 4 is placed on the load bearing back surface of the load bearing platform 25.

[0043] In an embodiment of the utility model, the pressure sensor 2 and the deformation sensing unit are at least prepared on the same monitoring substrate 1 based on silk screen printing, as shown in Figure 1 When the pressure sensing unit 2 and the deformation sensing unit are prepared on the monitoring substrate 1, in order to be able to adapt to the load bearing platform 25, the monitoring substrate 1 can be cut according to the position attached to the load bearing platform 25, so that the pressure sensor 2, the first deformation sensor 3 and the second deformation sensor 4 can be effectively attached to the corresponding area, such as the pressure sensor 2 can be effectively attached to the load bearing area.

[0044] It should be noted that the pressure sensor 2 is used to monitor the real-time pressure change of the load-bearing area, and is used to judge the working state of the structure damage monitoring device; based on the pressure value output by the pressure sensor 2, it can be determined that the load-bearing platform 25 is currently in a "load" state or a "no load" state. The first deformation sensor 3 and the second deformation sensor 4 are used to detect the bending of the load-bearing platform 25 due to the load, and the output signal is proportional to the bending degree. The deformation degree at different positions can be monitored through the first deformation sensor 3 and the second deformation sensor 4, and the real-time three-dimensional shape of the load-bearing platform 25 can be obtained.

[0045] In specific implementation, the pressure sensor 2 can use a half-bridge circuit to detect the output state of the pressure sensor 2, and the pressure sensor 2 outputs the pressure value in the form of voltage. During operation, the output of the pressure sensor 2 is continuously monitored through the half-bridge circuit. The pressure sensor 2 has a preheating time of 3 seconds after starting, and the voltage output by the pressure sensor 2 is stabilized. The current voltage is saved as the initial value, which is "no signal". After that, the voltage change caused by the load 26 is "signal". When the pressure sensor 2 is disconnected, the voltage output by the pressure sensor 2 monitored by the half-bridge circuit is infinite, so it can be judged as "sensor damage signal".

[0046] The first deformation sensor 3 and the second deformation sensor 4 are connected into a half-bridge circuit, wherein the voltage across the first deformation sensor 3 is used as the sensor signal, and the first deformation sensor 3 and the second deformation sensor 4 are connected into a half-bridge circuit. The connection mode can refer to the corresponding description below.

[0047] When the load-bearing platform 25 is subjected to structural damage monitoring, the following provisions can be made. Specifically, when there is no load 26 on the load-bearing platform 25, the voltage corresponding to the output of the pressure sensor 2 is "no signal". When the load-bearing platform 25 is bent and deformed, the voltage detected by the deformation sensing unit changes, and the changed voltage is "signal". It can be understood that when the load-bearing platform 25 is bent to different degrees, the size of the deformation type obtained by using the half-bridge circuit will be different, and the signal "warning value" is the voltage output by the first deformation sensor 3 when the load-bearing platform 25 is bent to an unworkable state. In specific implementation, according to the type of the load-bearing platform 25, the warning value can be determined by calibration or other methods. The specific determination method and process can be consistent with the prior art, which will not be described here.

[0048] Specifically, based on the output voltage of the pressure sensor 2 and the voltage output by the deformation sensing unit, when the load-bearing platform 25 is subjected to structural damage monitoring, the following provisions can be made:

[0049]

[0050]

[0051] The above gives an embodiment of using the pressure sensor 2 and the deformation sensing unit to monitor the structural damage of the load bearing platform 25. The specific conditions of the pressure sensor 2 and the deformation sensor are described below.

[0052] In an embodiment of the utility model, the pressure sensor 2 includes pressure sensing units 13 in array distribution, wherein,

[0053] The pressure sensing units 13 in the same row are connected with the same row pressure sensing electrode line, and the pressure sensing units in the same row are connected with the same column pressure sensing electrode line.

[0054] For each pressure sensing unit 13, at least a high-resistance conductive elastic block 22 is included, wherein the high-resistance conductive elastic block 22 is electrically connected with the corresponding row pressure sensing electrode line in the row and the corresponding column pressure sensing electrode line in the column.

[0055] The pressure sensor 2 includes a plurality of pressure sensing units 13, Figure 2 In the embodiment of the pressure sensor 2 shown in the figure, it can be seen from the figure that the pressure sensor 2 includes four pressure sensing units 13, and the four pressure sensing units 13 are in the form of array distribution in two rows and two columns. When the pressure sensor 2 includes other number of pressure sensing units 13 and corresponding array distribution form, reference can be made to Figure 2 and the description herein, which will not be illustrated one by one. It should be noted that the range and reliability of the load 26 pressure sensing can be improved by the plurality of pressure sensing units 13.

[0056] In order to lead out the pressure sensing unit 13, the corresponding row pressure sensing electrode line and column pressure sensing electrode line should be provided on the monitoring substrate 1, wherein the row pressure sensing electrode line and column pressure sensing electrode line are both silver lines, and the row pressure sensing electrode line and column pressure sensing electrode line can be prepared on the monitoring substrate 1 by screen printing process.

[0057] In specific implementation, the pressure sensing units 13 in the same row are connected with the same row pressure sensing electrode line, and the pressure sensing units in the same row are connected with the same column pressure sensing electrode line. Figure 2 In the embodiment, the two pressure sensing units 13 above are taken as the first row, and the remaining two pressure sensing units 13 are taken as the second row. At this time, the two pressure sensing units 13 in the first row are electrically connected with the first row pressure sensing electrode line 15 at the same time, and the two pressure sensing units 13 in the second row are electrically connected with the second row pressure sensing electrode line 16 at the same time. Similarly, Figure 2The two pressure sensing units 13 on the left side are designated as the first column, and the two pressure sensing units on the right side are designated as the second column. At this time, the two pressure sensing units 13 in the first column are simultaneously electrically connected to the pressure sensing electrode line 17 of the first column, and the two pressure sensing units 13 in the second column are simultaneously electrically connected to the pressure sensing electrode line 14 of the second column.

[0058] right Figure 2 As can be seen from the above description, the pressure sensor 2 shown in the figure should include four electrode lines, specifically: the first row of pressure sensing electrode lines 15, the second row of pressure sensing electrode lines 16, the first column of pressure sensing electrode lines 17, and the second column of pressure sensing electrode lines 14.

[0059] In order to achieve pressure sensing, by Figure 3 It is understood that each pressure sensing unit 13 should include at least one high-resistance conductive elastic block 22. Pressure sensing can be achieved using the high-resistance conductive elastic block 22. At this time, each high-resistance conductive elastic block 22 should be connected to the corresponding row pressure sensing electrode line and column pressure sensing electrode line. The corresponding connection status can be referred to Figure 2 , Figure 3 And the above explanation.

[0060] The following example illustrates the principle of pressure sensing using a high-resistance conductive elastic block 22. Specifically, the high-resistance conductive elastic block 22 can be made by mixing and baking conductive particles and an elastic polymer. The conductive particles are uniformly distributed and adhered by the polymer material. When the conductive particles within the high-resistance conductive elastic block 22 form a path, they exhibit a resistance value. When the load 26 presses on the corresponding pressure sensing unit 13, the corresponding high-resistance conductive elastic block 22 is compressed, the distance between the internal conductive particles decreases, resulting in a decrease in resistance. The degree of decrease corresponds one-to-one with the pressure magnitude, thereby achieving pressure sensing. The specific manufacturing process and procedures for making the high-resistance conductive elastic block 22 by mixing and baking conductive particles and an elastic polymer are consistent with existing technologies and will not be elaborated here.

[0061] In one embodiment of the present invention, the pressure sensor 2 further includes a monitoring and sensing insulating layer 21, wherein the monitoring and sensing insulating layer 21 covers at least the arrayed pressure sensing units 13.

[0062] A waterproof and dustproof protective layer 20 is provided on the monitoring and sensing insulation layer 21, and the waterproof and dustproof protective layer 20 covers the monitoring and sensing insulation layer 21.

[0063] When the pressure sensor 2 is formed by the array distributed pressure sensing units 13, in order to ensure the reliability of the different pressure sensing units 13, the pressure sensor 2 can further comprise a monitoring sensing insulation layer 21, the monitoring sensing insulation layer 21 at least covers the array distributed pressure sensing units 13, of course, the monitoring sensing insulation layer 21 can also cover the area where the entire pressure sensor 2 is located. The monitoring sensing insulation layer 21 can adopt the commonly used insulation material, and the purpose of insulation isolation is achieved. In addition, the waterproof and dustproof protective layer 20 is arranged on the monitoring sensing insulation layer 21, the waterproof and dustproof protective layer 20 can be used for waterproof and dustproof protection of the pressure sensor 2, and the waterproof and dustproof protective layer 20 can adopt the commonly used waterproof and dustproof material, and the specific material type can be selected according to the needs, so as to meet the waterproof and dustproof needs.

[0064] In an embodiment of the utility model, the row pressure sensing electrode line and the column pressure sensing electrode line are prepared on the monitoring substrate 1 by silk screen printing, wherein,

[0065] The row pressure sensing electrode line and the corresponding column pressure sensing electrode line are insulated and separated by the sensing electrode line insulation separation block 18 arranged on the monitoring substrate 1.

[0066] Specifically, the row pressure sensing electrode line and the column pressure sensing electrode line are printed by the silk screen printing process, which can be consistent with the prior art, and will not be described here. In addition, the high-resistance conductive elastic block 22 can be prepared by silk screen printing. Figure 2 It can be seen that the row pressure sensing electrode line and the corresponding column pressure sensing electrode line generally exist in space intersection, in order to improve the reliability, the row pressure sensing electrode line and the corresponding column pressure sensing electrode line are insulated and separated by the sensing electrode line insulation separation block 18, as shown in Figure 2 and Figure 4 .

[0067] In an embodiment of the utility model, the deformation sensor comprises a deformation sensor main body, wherein,

[0068] The deformation sensor main body comprises a plurality of mutually parallel deformation sensing lines 23, and adjacent deformation sensing lines 23 are connected through arc-shaped transition connection;

[0069] When the deformation sensing unit is attached to the bearing platform 25, the length direction of the deformation sensing line 23 is consistent with the length direction of the bearing platform 25.

[0070] In specific implementation, the two deformation sensors in the deformation sensing unit can generally adopt the same structure form, of course, the deformation sensors in the deformation sensing unit can also adopt different forms, and the same form is preferably adopted, so that the same monitoring substrate 1 can be conveniently prepared. Figure 5An embodiment of the deformation sensor is shown in the figure, and it can be seen from the figure that the deformation sensor body includes a plurality of deformation sensor lines 23, and the number of the deformation sensor lines 23 can be selected according to requirements, Figure 5 An embodiment in which the deformation sensor body includes four deformation sensor lines 23 is shown in the figure.

[0071] It should be noted that the deformation sensor lines 23 in the deformation sensor body should be connected in series as a whole, and in the figure, the adjacent deformation sensor lines 23 are connected through arc-shaped transition connections, specifically, the arc-shaped transition connections are connected through arc-shaped transition regions 24, and the arc-shaped transition regions 24 are generally not prepared through the same process step as the deformation sensor lines 23, and specifically, the arc-shaped transition regions 24 are prepared to meet the requirements of connecting the deformation sensor lines 23 in series.

[0072] In order to realize deformation measurement of the load platform 25, when the deformation sensor unit is attached to the load platform 25, the length direction of the deformation sensor line 23 is consistent with the length direction of the load platform 25. The deformation sensor line 23 can adopt the same form as the high-resistance conductive elastic block 22 described above, that is, the deformation sensor line 23 can be prepared by mixing and baking conductive particles and elastic polymers. When the deformation sensor is attached to the load platform 25, the load platform 25 will be bent downward due to the weight of the load 26, which will cause the deformation sensor line 23 to be elongated, the distance between the conductive particles in the deformation sensor line 23 will be increased, and the resistance of the deformation sensor body will be increased, thereby realizing the monitoring of the deformation of the load platform 25.

[0073] In order to lead out the deformation sensor body, the deformation sensor should also include a deformation sensor first lead-out electrode line 27 and a deformation sensor second lead-out electrode line 28, wherein the deformation sensor first lead-out electrode line 27 and the deformation sensor second lead-out electrode line 28 are respectively electrically connected to the two ends of the deformation sensor body, and the deformation sensor first lead-out electrode line 27 and the deformation sensor second lead-out electrode line 28 can also generally be silver electrodes and can be prepared through screen printing.

[0074] When the deformation sensor adopts Figure 5 In the embodiment shown in the figure, when the first deformation sensor 3 and the second deformation sensor 4 are connected into a half-bridge circuit, the deformation sensor first lead-out electrode line 27 of the first deformation sensor 3 is connected to a power supply, the deformation sensor second lead-out electrode line 28 of the first deformation sensor 3 is connected in series with the deformation sensor first lead-out electrode line 27 of the second deformation sensor 4, and the deformation sensor second lead-out electrode line 28 of the second deformation sensor 4 is grounded.

[0075] In an embodiment of the utility model, the monitoring sensor insulating layer 21 is also capped on the deformation sensor body, so as to insulate and isolate the deformation sensor lines 23 in the deformation sensor body by using the monitoring sensor insulating layer 21. In an embodiment of the utility model, the monitoring sensor insulating layer 21 is also capped on the deformation sensor body, so as to insulate and isolate the deformation sensor lines 23 in the deformation sensor body by using the monitoring sensor insulating layer 21.

[0076] In order to improve the reliability of the deformation sensing line 23, the monitoring sensing insulating layer 21 also covers at least the deformation sensing body, generally, the monitoring sensing insulating layer 21 should effectively cover the monitoring substrate 1, and of course, the waterproof and dustproof protective layer 20 should also be arranged on the monitoring sensing insulating layer 21.

[0077] In an embodiment of the utility model, all the deformation sensing line 23, the row pressure sensing electrode line and the column pressure sensing electrode line converge at the first end of the monitoring substrate 1, and the pressure sensor 2 is located at the second end of the monitoring substrate 1, wherein,

[0078] The direction of the first end of the monitoring substrate 1 pointing to the second end of the monitoring substrate 1 is consistent with the length direction of the monitoring substrate 1.

[0079] Figure 1 And Figure 7 An embodiment in which the deformation sensing line 23, the row pressure sensing electrode line and the column pressure sensing electrode line converge at the first end of the monitoring substrate 1 is shown in the utility model, specifically, as known from the above description, when converging at the first end of the monitoring substrate 1, mainly the first row pressure sensing electrode line 15, the second row pressure sensing electrode line 16, the first column pressure sensing electrode line 17, the second column pressure sensing electrode line 14, the two deformation sensing first lead-out electrode lines 27 and the two deformation sensing second lead-out electrode lines 28 converge at the first end of the monitoring substrate 1.

[0080] Figure 1 In the utility model, after convergence, the first deformation sensor first connecting end 5 connected with the deformation sensing first lead-out electrode line 27 of the first deformation sensor 3, the first deformation sensor second connecting end 6 connected with the deformation sensing second lead-out electrode line 28 of the first deformation sensor 3, the pressure sensor first connecting end 7 connected with the first row pressure sensing electrode line 15, the pressure sensor second connecting end 8 connected with the second row pressure sensing electrode line 16, the pressure sensor third connecting end 9 connected with the first column pressure sensing electrode line 17, the pressure sensor fourth connecting end 10 connected with the second column pressure sensing electrode line 14, the second deformation sensor first connecting end 11 connected with the deformation sensing first lead-out electrode line 27 of the second deformation sensor 4 and the second deformation sensor second connecting end 12 connected with the deformation sensing second lead-out electrode line 28 of the second deformation sensor 4 can be obtained.

[0081] It can be understood that after converging at the first end of the monitoring substrate 1, the thickness of the stress sensing area of the structural damage monitoring device can be ensured to be uniform, and the outer surface is flat.

[0082] In one embodiment of the utility model, the monitoring substrate 1 comprises a PET (polyethylene terephthalate) film, a TPU (thermoplastic polyurethane elastomer film) or a PI (polyimide) film, wherein,

[0083] The back of the monitoring substrate 1 is provided with a mounting connecting layer 19, and the monitoring substrate 1 is fixed on the load-bearing platform 25 through the mounting connecting layer 19.

[0084] In specific implementation, the monitoring substrate 1 can also adopt other materials, and the type of the material adopted by the monitoring substrate 1 can be selected according to requirements. The mounting connecting layer 19 comprises a double-sided adhesive layer, and the monitoring substrate 1 can be conveniently and quickly mounted on the load-bearing platform 25 through the mounting connecting layer 19.

Claims

1. A structural damage monitoring device for a load bearing platform, characterized by, The structural damage monitoring device can be attached to the load-bearing platform and comprises at least a pressure sensor and a deformation sensing unit, wherein, The pressure sensor is attached to the load-bearing area of the load-bearing surface of the load-bearing platform; The deformation sensing unit comprises at least two deformation sensors for deformation monitoring, wherein one deformation sensor is attached to the load-bearing surface of the load-bearing platform, and one deformation sensor is attached to the load-bearing back surface of the load-bearing platform, which is the opposite surface of the load-bearing surface of the load-bearing platform; The pressure sensor and the deformation sensing unit are prepared on the same monitoring substrate based on at least screen printing, wherein when the load-bearing platform is subjected to structural damage monitoring, the two deformation sensors in the deformation sensing unit are connected into a half-bridge circuit.

2. The structural damage monitoring apparatus for a load bearing platform according to claim 1, wherein: The pressure sensor comprises an array of pressure sensing units, wherein, The pressure sensing units in the same row are connected to the same row pressure sensing electrode line, and the pressure sensing units in the same row are connected to the same column pressure sensing electrode line; For each pressure sensing unit, at least a high-resistance conductive elastic block is included, wherein the high-resistance conductive elastic block is electrically connected to the corresponding row pressure sensing electrode line and the corresponding column pressure sensing electrode line.

3. The structural damage monitoring apparatus for a load bearing platform according to claim 2, wherein: The pressure sensor further comprises a monitoring sensing insulating layer, wherein the monitoring sensing insulating layer covers at least the array of pressure sensing units; A waterproof and dustproof protective layer is provided on the monitoring sensing insulating layer, which covers the monitoring sensing insulating layer.

4. The structural damage monitoring apparatus for a load bearing platform according to claim 2, wherein: The row pressure sensing electrode line and the column pressure sensing electrode line are prepared on the monitoring substrate by screen printing, wherein, An insulating isolation block for the sensing electrode line is also provided on the monitoring substrate, which insulates and isolates the row pressure sensing electrode line and the corresponding column pressure sensing electrode line.

5. The structural damage monitoring apparatus for a load bearing platform according to claim 4, wherein: The row pressure sensing electrode line and the column pressure sensing electrode line are both silver lines.

6. The structural damage monitoring apparatus for a load bearing platform according to claim 3, wherein: The deformation sensor comprises a deformation sensing body, wherein, The deformation sensing body comprises a plurality of mutually parallel deformation sensing lines, and adjacent deformation sensing lines are connected by arc-shaped transition connections; When the deformation sensing unit is attached to the load-bearing platform, the length direction of the deformation sensing lines is consistent with the length direction of the load-bearing platform.

7. The structural damage monitoring apparatus for a load bearing platform according to claim 6, wherein: The monitoring sensing insulating layer also covers the deformation sensing body to insulate and isolate the deformation sensing lines in the deformation sensing body.

8. The structural damage monitoring apparatus for a load bearing platform according to claim 7, wherein: All the deformation sensing lines, row pressure sensing electrode lines, and column pressure sensing electrode lines converge at the first end of the monitoring substrate, and the pressure sensor is located at the second end of the monitoring substrate, wherein, The direction of the first end of the monitoring substrate pointing to the second end of the monitoring substrate is consistent with the length direction of the monitoring substrate.

9. A structural damage monitoring apparatus for a load bearing platform according to any one of claims 1 to 8, characterised in that: The monitoring substrate comprises a PET film, a TPU film, or a PI film, wherein, The back surface of the monitoring substrate is provided with an attachment connection layer, and the monitoring substrate is attached and fixed to the load-bearing platform through the attachment connection layer.

10. The structural damage monitoring apparatus for a load bearing platform of claim 9, wherein: The attachment connection layer comprises a double-sided adhesive layer.

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