A building crack detection device and method

Abstract

The present invention discloses a building crack detection device, which includes an identification module, a camera, a processor module, a power supply module, a storage module and a touch screen. The touch screen, the storage module, the power supply module and the camera are all electrically connected to the processor module. The identification module includes an identification mechanism embedded in the building and a card reader-writer, and the card reader-writer is electrically connected to the processor module. At the same time, a detection method based on the above device is disclosed. By using the above building crack detection device and method, the positioning, width detection and trend judgment of building crack detection points can be realized, and the detection is convenient and accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of crack detection, and in particular to a building crack detection device and method. Background Art

[0002] Due to factors such as construction, materials, and age, cracks and fissures often exist in parts such as walls, floors, beams, and columns during the construction and use of buildings, which are related to the health and lifespan of the buildings, and even the safety of the residents. The detection of crack widths, dynamic monitoring, and trend judgment for key parts are important components of building health assessment.

[0003] Currently, the more commonly used methods for crack width detection mainly include visual inspection method, feeler gauge detection method, ultrasonic method, and photograph magnification observation method. The visual inspection method and feeler gauge rely on manual work and experience, and the detection error is large. The ultrasonic detection method is easily affected by external interference. The photograph magnification observation method is relatively accurate. However, none of the above methods can solve two problems: positioning and reference, that is, the position information of the detection points cannot be saved, which is not convenient for comparing with historical data to obtain the width trend change. Secondly, the reference cannot be determined. For example, when using the photograph magnification observation method, a detector camera needs to be fixed on the defect surface, and the distance between the camera lens and the surface to be inspected of the building should be the same to achieve the accuracy of the built-in reference scale in the image, which is inconvenient in actual application. Summary of the Invention

[0004] The purpose of the present invention is to provide a building crack detection device and method, which can achieve the positioning, width detection, and trend judgment of building crack detection points, and the detection is convenient and accurate.

[0005] To achieve the above purpose, the present invention provides a building crack detection device, including an identification module, a camera, a processor module, a power supply module, a storage module, and a touch screen. The touch screen, storage module, power supply module, and camera are all electrically connected to the processor module. The identification module includes an identification mechanism embedded in the building and a card reader / writer, and the card reader / writer is electrically connected to the processor module.

[0006] Preferably, the identification mechanism includes an embedding tube, a plug, an identification label, and a reference external head. The reference external head is fixed at the top of the embedding tube. An identification label is arranged inside the embedding tube, and a plug is fixed at the open end of the embedding tube.

[0007] Preferably, the reference external head is a circular structure or a square structure with a central engraved line. A bonding layer is arranged on the side of the reference external head connected to the embedding tube. A glass protection tube or a plastic protection tube is arranged outside the identification label. The plug is connected to the open end of the embedding tube by threading or interference fit.

[0008] Preferably, the card reader and the touch screen are both connected to the processor module through USB interfaces, and the camera is connected to the processor module through a MIPI camera interface.

[0009] A detection method based on the above-mentioned building crack detection device is as follows:

[0010] Step S1: Determine the position of the identification mechanism and write the identification mechanism number;

[0011] Step S2: Collect crack pictures with the identification mechanism and transmit them to the processor unit for display;

[0012] Step S3: Calculate the crack width according to the ratio of the reference external head to the crack, and bind and store the width data with the number;

[0013] Step S4: During the crack inspection process, read the number, historical crack width and pictures of the identification label through the card reader;

[0014] Step S5: Collect crack pictures with the identification mechanism, transmit them to the processor unit, calculate the crack width, compare and calculate it with the historical width, and bind and store the width data with the number;

[0015] Step S6: Display the change trend of the crack width through the touch screen and determine the change trend.

[0016] Preferably, drill a hole near the crack, place the identification mechanism with the identification label in the hole and fix it on the wall through the bonding layer, input the number through the touch display screen, and write the number into the identification label through the card reader.

[0017] Preferably, the gray gradient descent method is used to detect the image width of the crack contour and the image width of the reference external head contour. The actual crack width calculation formula is as follows:

[0018]

[0019] Among them, h1 is the image width of the crack contour, h2 is the image width of the reference external head contour, and R is the radius of the reference external head.

[0020] Preferably, the change trend includes an unchanged trend and an increasing trend, and the increasing trend includes increasing speed data.

[0021] Therefore, the present invention adopts the above-mentioned building crack detection device and method, and has the following beneficial effects:

[0022] (1) Bind the identification mechanism with the building crack to realize the positioning of the building crack detection point.

[0023] (2) The detection is carried out by comparing the reference external head with the crack width, which is convenient to operate. There is no limit to the distance between the camera and the building, and the width detection is more convenient and accurate. At the same time, trend prediction is carried out to facilitate the staff to discover potential safety hazards in time.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a building crack detection device of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the identification mechanism of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the embedded pipe of the present invention;

[0028] Figure 4 It is a flowchart of a building crack detection method of the present invention.

[0029] Reference Signs

[0030] 1. Embedded pipe; 2. Reference external head; 21. Adhesive layer; 3. Identification label; 4. Plug. Detailed Embodiments

[0031] Embodiment

[0032] Figure 1 It is a schematic structural diagram of a building crack detection device of the present invention, Figure 2 It is a schematic structural diagram of the identification mechanism of the present invention, Figure 3 It is a schematic structural diagram of the embedded pipe of the present invention, as Figures 1-3As shown in the figure, a building crack detection device includes an identification module, a camera, a processor module, a power supply module, a storage module, and a touch screen. The touch screen, the storage module, the power supply module, and the camera are all electrically connected to the processor module. The processor module uses the ZYNQ7000 development board of ALINX company as the main board, equipped with an original MIPI camera interface, an HDMI output interface, a USB2.0 Host interface, an SD card slot, and a gigabit Ethernet interface. The camera uses a 4K high-resolution low-distortion zoom camera, which is connected to the USB port of the development board to capture crack images and transmit them to the development board. The touch screen uses a capacitive touch screen, which is connected to the USB port of the development board through a USB cable for touch signal communication and is connected to the HDMI output interface for camera image output and user interaction. The identification module includes an identification mechanism embedded in the building and a card reader-writer. The card reader-writer is electrically connected to the processor module. The card reader-writer uses an RFID ultra-high frequency reader-write module, which is connected to the USB port of the development board for signal communication to read or write RFID tags. The identification mechanism includes an embedding tube 1, a plug 4, an identification tag 3, and a reference external head 2. The reference external head 2 is fixed at the top of the embedding tube 1. The identification tag 3 is arranged inside the embedding tube 1. A plug 4 is fixed at the open end of the embedding tube 1. The embedding tube 1 is used to set the identification tag 3 in the wall and has a certain protective effect. The embedding tube 1 is of millimeter size, very small, and drilling on non-porous building surfaces will not affect the crack morphology. The reference external head 2 is a circular structure or a square structure with a central engraved line. In this embodiment, the reference external head 2 with a circular structure is adopted. A bonding layer 21 is arranged on one side of the reference external head 2 connected to the embedding tube 1. A glass protection tube or a plastic protection tube is arranged outside the identification tag 3. The plug 4 is connected to the open end of the embedding tube 1 by thread or interference fit.

[0033] A detection method based on the above building crack detection device is as follows:

[0034] Step S1: Determine the position of the identification mechanism and write the identification mechanism number. Drill a hole near the crack, place the identification mechanism with the identification tag in the hole and fix it on the wall through the bonding layer. Input the number through the touch display screen and write the number into the identification tag through the card reader-writer.

[0035] Step S2: Collect the crack pictures with the identification mechanism and transmit them to the processor unit for display.

[0036] Step S3: Calculate the crack width according to the ratio of the reference external head to the crack, and bind and store the width data with the number.

[0037] Step S4: During the crack inspection process, read the number, historical crack width, and pictures of the identification tag through the card reader-writer.

[0038] Step S5: Collect crack images with an identification mechanism, transmit them to the processor unit, calculate the crack width, compare it with the historical width, and store the width data bound with the number.

[0039] Step S6: Display the crack width change trend through the touch screen and determine the change trend. The change trend includes an unchanged trend and an increasing trend, and the increasing trend includes the calculation of the increasing speed.

[0040] The image width of the crack contour and the image width of the reference external head contour are detected by using the gray gradient descent method. The actual crack width calculation formula is as follows:

[0041]

[0042] Among them, h1 is the image width of the crack contour, h2 is the image width of the reference external head contour, and R is the radius of the reference external head. Comparing the reference external head with the crack width for detection is convenient to operate, there is no limit to the distance between the camera and the building, the width detection is more convenient and accurate, and at the same time, trend prediction is carried out, which is convenient for the staff to discover potential safety hazards in time.

[0043] Therefore, the present invention adopts the above-mentioned building crack detection device and method to realize the positioning, width detection and trend judgment of building crack detection points, and the detection is convenient and accurate.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A building crack detection device, characterized in that: It includes an identification module, a camera, a processor module, a power supply module, a storage module, and a touch screen. The touch screen, storage module, power supply module, and camera are all electrically connected to the processor module. The identification module includes an identification mechanism embedded in a building and a card reader / writer, and the card reader / writer is electrically connected to the processor module; The identification mechanism includes an embedding tube, a plug, an identification label, and a reference external head. The reference external head is fixed at the top of the embedding tube. An identification label is arranged inside the embedding tube, and a plug is fixed at the open end of the embedding tube; on one side where the reference external head is connected to the embedding tube, there is an adhesive layer. A glass protection tube or a plastic protection tube is arranged outside the identification label, and the plug is connected to the open end of the embedding tube by threading or interference fit.

2. The building crack detection device according to claim 1, wherein: The reference external head is a circular structure or a square structure with a central engraved line.

3. A building crack detection device according to claim 1, characterized in that: Both the card reader / writer and the touch screen are connected to the processor module through USB interfaces, and the camera is connected to the processor module through a MIPI camera interface.

4. A detection method for a building crack detection device based on any one of the above claims 1-3, characterized in that, The specific steps are as follows: Step S1: Determine the position of the identification mechanism and write the identification mechanism number; Step S2: Collect crack pictures with the identification mechanism and transmit them to the processor unit for display; Step S3: Calculate the crack width according to the ratio between the reference external head and the crack, and bind and store the width data with the number; Step S4: During the crack inspection process, read the number, historical crack width, and pictures of the identification label through the card reader / writer; Step S5: Collect crack pictures with the identification mechanism, transmit them to the processor unit, calculate the crack width, compare and calculate it with the historical width, and bind and store the width data with the number; Step S6: Display the crack width change trend through the touch screen and determine the change trend.

5. The detection method according to claim 4, characterized in that: Drill a hole near the crack, place the identification mechanism with the identification label in the hole and fix it on the wall surface through the adhesive layer. Input the number through the touch display screen, and write the number into the identification label through the card reader / writer.

6. The detection method according to claim 5, characterized in that: Use the gray gradient descent method to detect the image width of the crack contour and the image width of the reference external head contour. The actual crack width calculation formula is as follows: Among them, h1 is the image width of the crack contour, h2 is the image width of the reference external head contour, and R is the radius of the reference external head.

7. The detection method according to claim 6, wherein: The change trend includes an unchanged trend and an increasing trend, and the increasing trend includes increasing speed data.

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