Self-adaptive concrete cracking monitoring device and method thereof

Abstract

The invention discloses a self-adaptive concrete cracking monitoring device which comprises two wheel type vacuum adsorption wall-climbing vehicles, the two wheel type vacuum adsorption wall-climbing vehicles are arranged side by side, the bottom of each wheel type vacuum adsorption wall-climbing vehicle is fixedly connected with two sponge gaskets, and the ends, away from the wheel type vacuum adsorption wall-climbing vehicles, of the four sponge gaskets are fixedly connected with conducting strips. Conducting pieces at the bottoms of the two wheel type vacuum adsorption wall-climbing vehicles are jointly connected with a concrete intelligent self-monitoring system, a mechanical fixing and connecting assembly is connected between the two wheel type vacuum adsorption wall-climbing vehicles, and the concrete intelligent self-monitoring system is wirelessly connected with a storage medium. The invention further discloses a self-adaptive concrete cracking monitoring method. According to the self-adaptive concrete crack monitoring device and method, the problems that in the prior art, concrete cracks of the silo wall are manually monitored, the cost is high, the risk is large, the period is long, and tiny cracks are difficult to recognize are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of concrete cracking monitoring, and particularly relates to a self-adaptive concrete cracking monitoring device and a self-adaptive concrete cracking monitoring method. BACKGROUND

[0002] In the construction process of storage silos, concrete is often used as a building material for construction, but after the silo is subjected to various environmental influences, such as wind load, seismic load, environmental erosion, or material aging, etc., the stress concentration and deterioration of the silo wall are accelerated, and finally cracks appear in the silo wall. The expansion of the cracks not only threatens the safety of the structure but also may cause secondary disasters, resulting in significant economic losses and safety hazards. However, artificial monitoring of concrete cracks in the silo wall is costly, risky, time-consuming, and difficult to identify small cracks. SUMMARY

[0003] The present application aims to provide a self-adaptive concrete cracking monitoring device that solves the problem of high cost, high risk, long cycle, and difficulty in identifying small cracks in the artificial monitoring of concrete cracks in the silo wall in the prior art.

[0004] Another object of the present application is to provide a self-adaptive concrete cracking monitoring method.

[0005] The technical solution adopted by the present application is a self-adaptive concrete cracking monitoring device, which comprises two wheeled vacuum adsorption wall climbing vehicles, the two wheeled vacuum adsorption wall climbing vehicles are arranged side by side, each wheeled vacuum adsorption wall climbing vehicle is fixedly connected with two sponge gaskets at the bottom, the four sponge gaskets are fixedly connected with conductive sheets at the end away from the wheeled vacuum adsorption wall climbing vehicle, the conductive sheets at the bottom of the two wheeled vacuum adsorption wall climbing vehicles are jointly connected with a concrete intelligent self-monitoring system, a mechanical fixed connection assembly is connected between the two wheeled vacuum adsorption wall climbing vehicles, and the concrete intelligent self-monitoring system is wirelessly connected with a storage medium.

[0006] The present application has the following characteristics: Both of the two wheeled vacuum adsorption wall climbing vehicles are four-wheel rear-drive vehicles, the two wheeled vacuum adsorption wall climbing vehicles are each provided with an adsorption device at the abdomen, the two wheeled vacuum adsorption wall climbing vehicles are each provided with a drive wheel at the bottom, the two wheeled vacuum adsorption wall climbing vehicles are each provided with a fixing hole at the top, and the two fixing holes are jointly connected with the mechanical fixed connection assembly.

[0007] The intelligent self-monitoring system for concrete includes a first intelligent voltmeter, one end of which is connected via a wire to an inner conductive plate on the bottom of a wheeled vacuum adsorption wall-climbing vehicle, and the other end of which is connected via a wire to an inner conductive plate on the bottom of another wheeled vacuum adsorption wall-climbing vehicle. It also includes a fixed resistor, one end of which is connected via a wire to an outer conductive plate on the bottom of a wheeled vacuum adsorption wall-climbing vehicle, and the other end of which is connected via a wire to a power source. The other end of the power source is connected via a wire to an outer conductive plate on the bottom of another wheeled vacuum adsorption wall-climbing vehicle. Furthermore, it includes a second intelligent voltmeter, which is connected in parallel with the fixed resistor via a wire. The first intelligent voltmeter is wirelessly connected to a storage medium.

[0008] The storage medium contains a calculation program that is adapted to the voltage data transmitted by the first and second smart voltmeters and is used to process the voltage data.

[0009] The mechanical fixing connection assembly includes a mechanical support, and two sliding fixing devices are fixed at both ends of the mechanical support by a snap-fit ​​device. The two sliding fixing devices move horizontally along the mechanical support and are respectively connected to the fixing holes of the two wheeled vacuum adsorption wall climbing vehicles.

[0010] Another technical solution adopted in this invention is an adaptive concrete cracking monitoring method, comprising the following steps: S1. Connect the power supply to the wire; S2. Install a fixed resistor on the power-on wire and install a second intelligent voltmeter on the wire, while installing a first intelligent voltmeter on another wire. S3. Attach conductive sheets to the ends of the two wires, connect the conductive sheets to the sponge pads, and then connect the sponge pads to the bottom of the two wheeled vacuum adsorption wall-climbing vehicles to form a combined device. S4 is connected to S3 via a mechanical fixed connection assembly to form a combined device; S5. Test and adjust the device, collect voltage data, and determine the degree of concrete cracking.

[0011] Another feature of the technical solution adopted in this invention is that: In S3, four conductive strips are respectively attached to four sponge pads one by one, and the bottoms of the two wheeled vacuum suction wall-climbing vehicles are each attached and fixed to the ends of two sponge pads away from the conductive strips.

[0012] In S4, when connecting the combined device through the mechanical fixed connection assembly, adjust the position of the sliding fixed device on the mechanical support so that the two wheeled vacuum adsorption wall-climbing vehicles are in a parallel position, and the conductive sheet is pressed tightly at the bottom of the wheeled vacuum adsorption wall-climbing vehicle.

[0013] Specifically, S5 involves the following process: During data collection, the first intelligent voltmeter wirelessly transmits the collected voltage data to the storage medium via a wire. The storage medium then processes the voltage data using a built-in calculation program to obtain the concrete resistivity change rate. p According to the rate of change of resistance p Due to their different properties, storage media divide resistance into four distinct ranges. α 1. α 2. α 3. α 4, α 1. α 2. α 3. α 4 corresponds to four different levels, when p ∈ α At time 1, it was determined that no cracks appeared in the concrete silo wall; p ∈ α At 2 o'clock, it was determined that there were tiny cracks in the concrete silo wall that were not easily observed by humans; p ∈ α At 3 o'clock, it was determined that long cracks that could be observed manually appeared in the concrete silo wall; p ∈ α At 4 o'clock, it is determined that the concrete silo wall has expanded cracks, and the degree of cracking is determined to be the most serious at this time.

[0014] Concrete resistivity change rate p The calculation process is as follows: The first intelligent voltmeter collects voltage data from the intelligent self-monitoring system of concrete in real time through wireless connection. The resistance of the inner electrode is obtained by the four-electrode method according to equations (1) and (2). (1); (2); In the formula, V 1. To measure the voltage across the fixed resistor, R 1 represents the value of the fixed resistor. I 1 represents the current value of the fixed resistor. V The potential difference between the electrodes being measured is... R The resistance of the area being measured; The concrete resistivity change rate is calculated according to equation (3). p ; (3); In the formula, R t is the area resistance measured at time t; R 0 represents the regional resistance measured when the concrete cracks.

[0015] The beneficial effects of this invention are: The adaptive concrete cracking monitoring device and method provided by this invention addresses the need for monitoring cracking in the hyperbolic arc-shaped concrete walls of silos. Utilizing the negative pressure adsorption and multi-directional movement capabilities of a wheeled vacuum adsorption climbing vehicle, combined with mechanical fixing components for parallel fixation and position adjustment, it can stably adapt to curved and vertical silo walls and achieve full-area mobile monitoring. A sponge pad ensures close contact between the conductive sheet and the concrete surface. Based on the four-electrode method of an intelligent concrete self-monitoring system, it collects resistance data in real time. Combined with a smart voltmeter's wireless transmission and storage medium calculation program, it can accurately calculate the rate of change of resistance to identify micro-cracks and classify them into four levels: "no cracking - micro-cracks - observable long cracks - expandable cracks." This solves the problems of high cost, high risk, and difficulty in identifying micro-cracks associated with traditional manual monitoring. Furthermore, by using intelligent monitoring and a climbing vehicle to replace high-altitude operations, it improves monitoring accuracy, timely early warning, and operational efficiency, providing reliable technical support for the safety protection of silo concrete walls. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the adaptive concrete cracking monitoring device of the present invention; Figure 2 This is a schematic diagram of the structure of the wheeled vacuum adsorption wall-climbing vehicle of the present invention; Figure 3 This is a side view of the wheeled vacuum adsorption wall-climbing vehicle of the present invention; Figure 4 This is a structural schematic diagram of the intelligent self-monitoring system for concrete of the present invention; Figure 5 This is a structural schematic diagram of the mechanical fixed connection assembly of the present invention.

[0017] In the figure, 1. Wheeled vacuum adsorption wall-climbing vehicle, 11. Fixing hole, 12. Adsorption device, 13. Drive wheel, 2. Sponge pad, 3. Intelligent self-monitoring system for concrete, 31. First intelligent voltmeter, 32. Power supply, 33. Fixed resistor, 34. Second intelligent voltmeter, 4. Mechanical fixing connection assembly, 41. Mechanical support, 42. Sliding fixing device. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] The adaptive concrete cracking monitoring device provided by this invention, such as Figure 1As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, arranged side by side. Each vehicle 1 has two sponge pads 2 fixed to its bottom. Conductive plates are fixed to the ends of the four sponge pads 2 furthest from the vehicle 1. The conductive plates at the bottom of both vehicles 1 are connected to a concrete intelligent self-monitoring system 3. A mechanical fixing connection assembly 4 connects the two vehicles 1. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium. The contact between the conductive plates and the concrete surface creates a current loop for the entire system. Figure 2 , 3 As shown, both wheeled vacuum suction wall-climbing vehicles 1 are four-wheeled rear-wheel drive vehicles. Each vehicle 1 has a suction device 12 located on its underside and drive wheels 13 at its bottom. The suction device 12 creates internal and external negative pressure, causing the vehicle 1 to adhere to the wall surface. Driven by the drive wheels 13, the vehicle moves in multiple directions on the wall surface. Each vehicle 1 has a fixing hole 11 at its top, which is connected to a mechanical fixing connection assembly 4. Figure 4 As shown, the intelligent self-monitoring system 3 for concrete includes a first intelligent voltmeter 31. One end of the first intelligent voltmeter 31 is connected via a wire to the inner conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1, and the other end is connected via a wire to the inner conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1. It also includes a fixed resistor 33. One end of the fixed resistor 33 is connected via a wire to the outer conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1, and the other end is connected via a wire to a power supply 32. The other end of the power supply 32 is connected via a wire to the outer conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1. It also includes a second intelligent voltmeter 34, which is connected in parallel with the fixed resistor 33 via a wire. The first intelligent voltmeter 31 is wirelessly connected to a storage medium. The storage medium stores a calculation program adapted to the voltage data transmitted by the first and second intelligent voltmeters 31 and 34 for processing the voltage data. Figure 5 As shown, the mechanical fixed connection assembly 4 includes a mechanical bracket 41. Both ends of the mechanical bracket 41 are fixed with sliding fixing devices 42 by snap-fit ​​devices. The two sliding fixing devices 42 move horizontally along the mechanical bracket 41 and are respectively connected to the fixing holes 11 of the two wheeled vacuum adsorption wall climbing vehicles 1.

[0020] Example 1 The adaptive concrete cracking monitoring device proposed in this embodiment, such as Figure 1As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, which are arranged side by side. Each wheeled vacuum adsorption wall-climbing vehicle 1 has two sponge pads 2 fixed to its bottom. Each of the four sponge pads 2 has a conductive sheet fixed to one end away from the wheeled vacuum adsorption wall-climbing vehicle 1. The conductive sheets at the bottom of the two wheeled vacuum adsorption wall-climbing vehicles 1 are connected to a concrete intelligent self-monitoring system 3. The two wheeled vacuum adsorption wall-climbing vehicles 1 are connected by a mechanical fixing connection assembly 4. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium.

[0021] Example 2 The adaptive concrete cracking monitoring device proposed in this embodiment, such as Figure 1 As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, arranged side by side. Each vehicle 1 has two sponge pads 2 fixed to its bottom. Conductive sheets are fixed to the ends of the four sponge pads 2 furthest from the vehicle 1. The conductive sheets at the bottom of both vehicles are connected to a concrete intelligent self-monitoring system 3. A mechanical fixing connection assembly 4 connects the two vehicles. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium. Figure 2 , 3 As shown, both wheeled vacuum adsorption wall-climbing vehicles 1 are four-wheel rear-wheel drive vehicles. Both wheeled vacuum adsorption wall-climbing vehicles 1 are equipped with adsorption devices 12 on their undersides. Both wheeled vacuum adsorption wall-climbing vehicles 1 are equipped with drive wheels 13 at their bottoms. Both wheeled vacuum adsorption wall-climbing vehicles 1 are equipped with fixing holes 11 on their tops. The two fixing holes 11 are adapted to and connected to the mechanical fixing connection assembly 4.

[0022] Example 3 The adaptive concrete cracking monitoring device proposed in this embodiment, such as Figure 1 As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, arranged side by side. Each vehicle 1 has two sponge pads 2 fixed to its bottom. Conductive sheets are fixed to the ends of the four sponge pads 2 furthest from the vehicle 1. The conductive sheets at the bottom of both vehicles are connected to a concrete intelligent self-monitoring system 3. A mechanical fixing connection assembly 4 connects the two vehicles. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium. Figure 2 , 3 As shown, both wheeled vacuum adsorption wall-climbing vehicles 1 are four-wheel rear-wheel drive vehicles. Each of the two vehicles 1 has an adsorption device 12 located on its underside, drive wheels 13 located at its bottom, and fixing holes 11 located on its top. Both fixing holes 11 are connected to the mechanical fixing connection assembly 4. Figure 4As shown, the intelligent self-monitoring system 3 for concrete includes a first intelligent voltmeter 31. One end of the first intelligent voltmeter 31 is connected to the inner conductive plate at the bottom of a wheeled vacuum adsorption wall-climbing vehicle 1 via a wire, and the other end of the first intelligent voltmeter 31 is connected to the inner conductive plate at the bottom of another wheeled vacuum adsorption wall-climbing vehicle 1 via a wire. It also includes a fixed resistor 33. One end of the fixed resistor 33 is connected to the outer conductive plate at the bottom of a wheeled vacuum adsorption wall-climbing vehicle 1 via a wire, and the other end of the fixed resistor 33 is connected to a power supply 32 via a wire. The other end of the power supply 32 is connected to the outer conductive plate at the bottom of another wheeled vacuum adsorption wall-climbing vehicle 1 via a wire. It also includes a second intelligent voltmeter 34, which is connected in parallel with the fixed resistor 33 via a wire. The first intelligent voltmeter 31 is wirelessly connected to a storage medium.

[0023] Example 4 The adaptive concrete cracking monitoring device proposed in this embodiment, such as Figure 1 As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, arranged side by side. Each vehicle 1 has two sponge pads 2 fixed to its bottom. Conductive sheets are fixed to the ends of the four sponge pads 2 furthest from the vehicle 1. The conductive sheets at the bottom of both vehicles are connected to a concrete intelligent self-monitoring system 3. A mechanical fixing connection assembly 4 connects the two vehicles. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium. Figure 2 , 3 As shown, both wheeled vacuum adsorption wall-climbing vehicles 1 are four-wheel rear-wheel drive vehicles. Each of the two vehicles 1 has an adsorption device 12 located on its underside, drive wheels 13 located at its bottom, and fixing holes 11 located on its top. Both fixing holes 11 are connected to the mechanical fixing connection assembly 4. Figure 4 As shown, the intelligent self-monitoring system 3 for concrete includes a first intelligent voltmeter 31. One end of the first intelligent voltmeter 31 is connected to the inner conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1 via a wire, and the other end of the first intelligent voltmeter 31 is connected to the inner conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1 via a wire. It also includes a fixed resistor 33. One end of the fixed resistor 33 is connected to the outer conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1 via a wire, and the other end of the fixed resistor 33 is connected to a power supply 32 via a wire. The other end of the power supply 32 is connected to the outer conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1 via a wire. It also includes a second intelligent voltmeter 34, which is connected in parallel with the fixed resistor 33 via a wire. The first intelligent voltmeter 31 is wirelessly connected to a storage medium. The storage medium stores a calculation program adapted to the voltage data transmitted by the first intelligent voltmeter 31 and the second intelligent voltmeter 34 for processing the voltage data.

[0024] Example 5 The adaptive concrete cracking monitoring device proposed in this embodiment, such as Figure 1 As shown, the system includes two wheeled vacuum adsorption wall-climbing vehicles 1, arranged side by side. Each vehicle 1 has two sponge pads 2 fixed to its bottom. Conductive sheets are fixed to the ends of the four sponge pads 2 furthest from the vehicle 1. The conductive sheets at the bottom of both vehicles are connected to a concrete intelligent self-monitoring system 3. A mechanical fixing connection assembly 4 connects the two vehicles. The concrete intelligent self-monitoring system 3 is wirelessly connected to a storage medium. Figure 2 , 3 As shown, both wheeled vacuum adsorption wall-climbing vehicles 1 are four-wheel rear-wheel drive vehicles. Each of the two vehicles 1 has an adsorption device 12 located on its underside, drive wheels 13 located at its bottom, and fixing holes 11 located on its top. Both fixing holes 11 are connected to the mechanical fixing connection assembly 4. Figure 4 As shown, the intelligent self-monitoring system 3 for concrete includes a first intelligent voltmeter 31. One end of the first intelligent voltmeter 31 is connected via a wire to the inner conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1, and the other end is connected via a wire to the inner conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1. It also includes a fixed resistor 33. One end of the fixed resistor 33 is connected via a wire to the outer conductive plate on the bottom of a wheeled vacuum suction wall-climbing vehicle 1, and the other end is connected via a wire to a power supply 32. The other end of the power supply 32 is connected via a wire to the outer conductive plate on the bottom of another wheeled vacuum suction wall-climbing vehicle 1. It also includes a second intelligent voltmeter 34, which is connected in parallel with the fixed resistor 33 via a wire. The first intelligent voltmeter 31 is wirelessly connected to a storage medium. The storage medium stores a calculation program adapted to the voltage data transmitted by the first and second intelligent voltmeters 31 and 34 for processing the voltage data. Figure 5 As shown, the mechanical fixed connection assembly 4 includes a mechanical bracket 41. Both ends of the mechanical bracket 41 are fixed with sliding fixing devices 42 by snap-fit ​​devices. The two sliding fixing devices 42 move horizontally along the mechanical bracket 41 and are respectively connected to the fixing holes 11 of the two wheeled vacuum adsorption wall climbing vehicles 1.

[0025] Example 6 The adaptive concrete cracking monitoring method proposed in this embodiment, based on the aforementioned adaptive concrete cracking monitoring device, includes the following steps: S1. Connect the power supply to the wire; S2. Install a fixed resistor on the power-on wire and install a second intelligent voltmeter on the wire, while installing a first intelligent voltmeter on another wire. S3. Attach conductive sheets to the ends of the two wires, connect the conductive sheets to the sponge pads, and then connect the sponge pads to the bottom of the two wheeled vacuum adsorption wall-climbing vehicles to form a combined device. S4 is connected to S3 via a mechanical fixed connection assembly to form a combined device; S5. Test and adjust the device, collect voltage data, and determine the degree of concrete cracking.

[0026] Example 7 The adaptive concrete cracking monitoring method proposed in this embodiment, based on the aforementioned adaptive concrete cracking monitoring device, includes the following steps: S1. Connect the power supply to the wire; S2. Install a fixed resistor on the power-on wire and install a second intelligent voltmeter on the wire, while installing a first intelligent voltmeter on another wire. S3. Attach conductive sheets to the ends of the two wires, connect the conductive sheets to the sponge pads, and then connect the sponge pads to the bottom of the two wheeled vacuum adsorption wall-climbing vehicles to form a combined device. In S3, four conductive strips are respectively attached to four sponge pads one by one, and the bottom of each of the two wheeled vacuum suction wall climbing vehicles is attached and fixed to the ends of two sponge pads away from the conductive strips. S4 is connected to S3 via a mechanical fixed connection assembly to form a combined device; S5. Test and adjust the device, collect voltage data, and determine the degree of concrete cracking.

[0027] Example 8 The adaptive concrete cracking monitoring method proposed in this embodiment, based on the aforementioned adaptive concrete cracking monitoring device, includes the following steps: S1. Connect the power supply to the wire; S2. Install a fixed resistor on the power-on wire and install a second intelligent voltmeter on the wire, while installing a first intelligent voltmeter on another wire. S3. Attach conductive sheets to the ends of the two wires, connect the conductive sheets to the sponge pads, and then connect the sponge pads to the bottom of the two wheeled vacuum adsorption wall-climbing vehicles to form a combined device. In S3, four conductive strips are respectively attached to four sponge pads one by one, and the bottom of each of the two wheeled vacuum suction wall climbing vehicles is attached and fixed to the ends of two sponge pads away from the conductive strips. S4 is connected to S3 via a mechanical fixed connection assembly to form a combined device; In S4, when connecting the combined device through the mechanical fixed connection assembly, adjust the position of the sliding fixed device on the mechanical support so that the two wheeled vacuum adsorption wall-climbing vehicles are in a parallel position and the bottom of the wheeled vacuum adsorption wall-climbing vehicles presses the conductive sheet. S5. Test and adjust the device, collect voltage data, and determine the concrete cracking situation. Specifically, S5 involves the following process: During data collection, the first intelligent voltmeter wirelessly transmits the collected voltage data to the storage medium via a wire. The storage medium then processes the voltage data using a built-in calculation program to obtain the concrete resistivity change rate. p According to the rate of change of resistance p Due to their different properties, storage media divide resistance into four distinct ranges. α 1. α 2. α 3. α 4, α 1. α 2. α 3. α 4 corresponds to four different levels, when p ∈ α At time 1, it was determined that no cracks appeared in the concrete silo wall; p ∈ α At 2 o'clock, it was determined that there were tiny cracks in the concrete silo wall that were not easily observed by humans; p ∈ α At 3 o'clock, it was determined that long cracks that could be observed manually appeared in the concrete silo wall; p ∈ α At 4 o'clock, it was determined that the concrete silo wall had cracks that could be expanded, and at this time the cracking degree was determined to be the most serious. Concrete resistivity change rate p The calculation process is as follows: The first intelligent voltmeter collects voltage data from the intelligent self-monitoring system of concrete in real time through wireless connection. The resistance of the inner electrode is obtained by the four-electrode method according to equations (1) and (2). (1); (2); In the formula, V 1. To measure the voltage across the fixed resistor, R 1 represents the value of the fixed resistor. I 1 represents the current value of the fixed resistor. V The potential difference between the electrodes being measured is... R The resistance of the area being measured; The concrete resistivity change rate is calculated according to equation (3). p ; (3); In the formula, Rt is the area resistance measured at time t; R 0 represents the regional resistance measured when the concrete cracks.

Claims

1. An adaptive concrete cracking monitoring device, characterized in that, The system includes two wheeled vacuum adsorption wall-climbing vehicles (1), which are arranged side by side. Each wheeled vacuum adsorption wall-climbing vehicle (1) has two sponge pads (2) fixed to its bottom. Each of the four sponge pads (2) has a conductive sheet fixed to one end away from the wheeled vacuum adsorption wall-climbing vehicle (1). The conductive sheets at the bottom of the two wheeled vacuum adsorption wall-climbing vehicles (1) are connected to a concrete intelligent self-monitoring system (3). The two wheeled vacuum adsorption wall-climbing vehicles (1) are connected by a mechanical fixing connection assembly (4). The concrete intelligent self-monitoring system (3) is wirelessly connected to a storage medium.

2. The adaptive concrete cracking monitoring device according to claim 1, characterized in that, Both of the wheeled vacuum adsorption wall climbing vehicles (1) are four-wheel rear-wheel drive vehicles. Both of the wheeled vacuum adsorption wall climbing vehicles (1) are equipped with adsorption devices (12) on their undersides. Both of the wheeled vacuum adsorption wall climbing vehicles (1) are equipped with drive wheels (13) at their bottoms. Both of the wheeled vacuum adsorption wall climbing vehicles (1) are equipped with fixing holes (11) at their tops. Both fixing holes (11) are adapted to and connected to the mechanical fixing connection assembly (4).

3. The adaptive concrete cracking monitoring device according to claim 2, characterized in that, The intelligent self-monitoring system (3) for concrete includes a first intelligent voltmeter (31), one end of which is connected to an inner conductive plate at the bottom of a wheeled vacuum adsorption climbing vehicle (1) via a wire, and the other end of which is connected to an inner conductive plate at the bottom of another wheeled vacuum adsorption climbing vehicle (1) via a wire. The system also includes a fixed resistor (33), one end of which is connected to an outer conductive plate at the bottom of a wheeled vacuum adsorption climbing vehicle (1) via a wire, and the other end of which is connected to a power supply (32) via a wire. The other end of which is connected to an outer conductive plate at the bottom of another wheeled vacuum adsorption climbing vehicle (1) via a wire. The system also includes a second intelligent voltmeter (34), which is connected in parallel with the fixed resistor (33) via a wire. The first intelligent voltmeter (31) is wirelessly connected to a storage medium.

4. The adaptive concrete cracking monitoring device according to claim 3, characterized in that, The storage medium stores a calculation program that is adapted to the voltage data transmitted by the first smart voltmeter (31) and the second smart voltmeter (34) and is used to process the voltage data.

5. The adaptive concrete cracking monitoring device according to claim 4, characterized in that, The mechanical fixed connection assembly (4) includes a mechanical bracket (41). Both ends of the mechanical bracket (41) are fixed with sliding fixing devices (42) by buckle devices. The two sliding fixing devices (42) move horizontally along the mechanical bracket (41). The two sliding fixing devices (42) are respectively connected to the fixing holes (11) of the two wheeled vacuum adsorption wall climbing vehicles (1).

6. An adaptive concrete cracking monitoring method, characterized in that, The adaptive concrete cracking monitoring device according to claim 5 includes the following steps: S1. Connect the power supply to the wire; S2. Install a fixed resistor on the power-on wire and install a second intelligent voltmeter on the wire, while installing a first intelligent voltmeter on another wire. S3. Attach conductive sheets to the ends of the two wires, connect the conductive sheets to the sponge pads, and then connect the sponge pads to the bottom of the two wheeled vacuum adsorption wall-climbing vehicles to form a combined device. S4 is connected to S3 via a mechanical fixed connection assembly to form a combined device; S5. Test and adjust the device, collect voltage data, and determine the degree of concrete cracking.

7. The adaptive concrete cracking monitoring method according to claim 6, characterized in that, In S3, four conductive sheets are respectively attached to four sponge pads one by one, and the bottoms of the two wheeled vacuum adsorption wall-climbing vehicles are each attached and fixed to the ends of two sponge pads away from the conductive sheets.

8. The adaptive concrete cracking monitoring method according to claim 6, characterized in that, In step S4, when connecting the combined device through the mechanical fixing connection assembly, the position of the sliding fixing device on the mechanical support is adjusted so that the two wheeled vacuum adsorption wall-climbing vehicles are in a parallel position and the conductive sheet is pressed tightly at the bottom of the wheeled vacuum adsorption wall-climbing vehicle.

9. The adaptive concrete cracking monitoring method according to claim 6, characterized in that, Specifically, S5 involves the following process: During data collection, the first intelligent voltmeter wirelessly transmits the collected voltage data to a storage medium via a wire. The storage medium then processes the voltage data using a built-in calculation program to obtain the concrete resistivity change rate. ρ According to the rate of change of resistance ρ Due to their different properties, storage media divide resistance into four distinct ranges. α 1. α 2. α 3. α 4, α 1. α 2. α 3. α 4 corresponds to four different levels, when ρ ∈ α At time 1, it was determined that no cracks appeared in the concrete silo wall; ρ ∈ α At 2 o'clock, it was determined that there were tiny cracks in the concrete silo wall that were not easily observed by humans; ρ ∈ α At 3 o'clock, it was determined that long cracks that could be observed manually appeared in the concrete silo wall; ρ ∈ α At 4 o'clock, it is determined that the concrete silo wall has expanded cracks, and the degree of cracking is determined to be the most serious at this time.

10. The adaptive concrete cracking monitoring method according to claim 9, characterized in that, The rate of change of concrete resistance ρ The calculation process is as follows: The first intelligent voltmeter collects voltage data from the intelligent self-monitoring system of concrete in real time through wireless connection. The resistance of the inner electrode is obtained by the four-electrode method according to equations (1) and (2). （1）； （2）； In the formula, V 1. To measure the voltage across the fixed resistor, R 1 represents the value of the fixed resistor. I 1 represents the current value of the fixed resistor. V The potential difference between the electrodes being measured is... R The resistance of the area being measured; The concrete resistivity change rate is calculated according to equation (3). ρ ; （3）； In the formula, R t is the area resistance measured at time t; R 0 represents the regional resistance measured when the concrete cracks.

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