Tunnel image modeling control point marker

Abstract

The utility model provides a kind of tunnel image modeling control point sign, belong to measuring device technical field, including luminous sign cloth, luminous sign cloth includes: waterproof cloth;Reflective cloth is laminated on waterproof cloth;Reflective cloth is provided with multiple luminous lamp pearl;Transparent waterproof membrane is laminated on reflective cloth;And power supply device, for the power supply of multiple luminous lamp pearl.The utility model of a kind of tunnel image modeling control point sign adopts luminous lamp pearl+the special display unit of reflective cloth, can provide clear identifiable control point position in weak light tunnel environment;And the cloth surface of luminous sign cloth has certain flexibility and tenacity, can be attached tunnel arc-shaped cave wall and keep flat, improve the precision of control point position measurement, identification, to further improve the precision of image three-dimensional modeling result in tunnel.

Description

Technical Field

[0001] This utility model belongs to the field of measuring device technology, and more specifically, it relates to a control point marker for tunnel image modeling. Background Technology

[0002] With the development of remote sensing photogrammetry technology, digital image processing technology for tunnel inspection has become increasingly mature. The automatic acquisition of optical, lidar, and infrared image data using specialized integrated equipment, followed by information extraction from the acquired image data using digital image processing algorithms, has enabled intelligent detection of tunnel defects and has become one of the important technical means for tunnel inspection.

[0003] To ensure the coordinate accuracy of the acquired images for modeling, control points need to be set up before photography. After obtaining the precise coordinates of these points, the model is given real geospatial coordinates and dimensions through methods such as control point adjustment.

[0004] The tunnel is characterized by the absence of GNSS signals, low light levels, and curved walls. Traditional cloth and paint control point markers are insufficient for high-precision measurements under low-light conditions, and the markers are difficult to discern on the acquired images, making it hard to visually determine their accurate location during point placement. Furthermore, rigid materials such as survey markers are difficult to apply to the tunnel walls, easily leading to problems such as model defacement, inaccurate coordinate dimensions, and damage to the tunnel walls. Utility Model Content

[0005] The purpose of this utility model is to provide a control point marker for tunnel image modeling. This marker is suitable for control point identification in low-light environments in tunnels. It can be fixed on flat surfaces or attached to curved tunnel walls, and is a control point marker that can achieve accurate measurement of points inside tunnels.

[0006] To achieve the above objectives, this utility model provides a control point marker for tunnel image modeling, comprising a luminous marker cloth; the luminous marker cloth includes:

[0007] Waterproof cloth;

[0008] A reflective fabric is layered on top of the waterproof fabric; the reflective fabric is equipped with multiple LED beads.

[0009] A transparent waterproof membrane is layered on the reflective fabric; and,

[0010] A power supply device for supplying power to the plurality of the light-emitting LED beads.

[0011] Furthermore, the waterproof fabric has Velcro on the side opposite to the reflective fabric.

[0012] Furthermore, the reflective fabric includes four centrally symmetrical reflective areas. Two adjacent reflective areas use two brightly colored and highly contrasting fabric surfaces, while two opposite reflective areas use fabric surfaces of the same color. The fabric surface color in each light-emitting area is the same as the light-emitting color of the light-emitting LED beads set in that area.

[0013] Furthermore, the four reflective areas of the reflective fabric are distributed in alternating red and yellow patterns.

[0014] Furthermore, the wires connecting the multiple light-emitting LED beads are disposed in the interlayer between the waterproof fabric and the reflective fabric.

[0015] Furthermore, the power supply device can be placed in the interlayer between the waterproof cloth and the reflective cloth, or it can be led out from one side of the luminous marking cloth.

[0016] Furthermore, the wire is connected to the power supply device.

[0017] Furthermore, the power supply device is powered by a button battery.

[0018] Furthermore, it also includes a simple frame, the periphery of which is fixed to the simple frame, and the simple frame is provided with a connection port for connecting the base device.

[0019] Furthermore, both the luminous marker cloth and the simple frame are quadrilaterals. The four corners of the luminous marker cloth are provided with cloth fixing holes, and the four corners of the simple frame are provided with fixing holes corresponding to the cloth fixing holes. Fixing screws pass through the cloth fixing holes and the fixing holes to fix the luminous marker cloth and the simple frame.

[0020] Furthermore, the simple frame is made of stainless steel strips spliced ​​together, and the connection port is located on the lower side of the simple frame and is a threaded connection port.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] This utility model provides a special display unit for control point markers in tunnel image modeling, which uses luminous LED beads and reflective cloth. This unit can provide clear and identifiable control point locations in low-light tunnel environments. Furthermore, the luminous marker cloth has a certain degree of flexibility and toughness, which allows it to conform to the curved tunnel wall and remain flat, improving the accuracy of control point location measurement and identification, and thus enhancing the accuracy of 3D image modeling results within the tunnel. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the overall structure of a tunnel image modeling control point marker provided in Embodiment 1 of this utility model;

[0025] Figure 2 for Figure 1 A front view structural diagram;

[0026] Figure 3 for Figure 1 A schematic diagram of the rear view structure;

[0027] Figure 4 This is a schematic diagram of a simplified frame provided in Embodiment 2 of this utility model.

[0028] The following are the labeling elements in the figure:

[0029] 1. Illuminated sign cloth, 101. Reflective cloth, 102. Waterproof cloth, 103. Illuminated LED beads, 104. Transparent waterproof membrane, 105. Velcro, 106. Power supply device, 107. Cloth fixing hole, 2. Simple frame, 201. Stainless steel strip, 202. Fixing hole, 203. Connection port. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] Please see Figures 1-4 The present invention will now describe a tunnel image modeling control point marker provided by an embodiment of the present invention.

[0035] Example 1

[0036] In one embodiment of this utility model, a control point marker for tunnel image modeling under low-light conditions includes a luminous marker cloth 1. The luminous marker cloth 1 includes: a waterproof cloth 102, a reflective cloth 101, a transparent waterproof membrane 104, and a power supply device 106. The reflective cloth 101 is layered on the waterproof cloth 102; multiple light-emitting LED beads 103 are disposed on the reflective cloth 101; the transparent waterproof membrane 104 is layered on the reflective cloth 101; and the power supply device 106 is used to supply power to the multiple light-emitting LED beads 103.

[0037] In this embodiment of the utility model, a control point marker for tunnel image modeling is used by attaching and fixing the luminous marker cloth 1 to the curved tunnel wall. When the external light source is insufficient, the power supply device 106 is turned on, supplying power to the luminous LED beads 103, causing the luminous LED beads 103 to be in an luminous state. Due to the special display unit of luminous LED beads 103 + reflective cloth 101, the control point position can be clearly identified in a low-light tunnel environment; and the cloth surface of the luminous marker cloth 1 has a certain degree of flexibility and toughness, which can fit the curved tunnel wall and remain flat, improving the accuracy of control point position measurement and identification, and thus improving the accuracy of the three-dimensional image modeling results inside the tunnel.

[0038] In this embodiment, the light-emitting lamp bead 103 can be an LED soft light bead, and a waterproof cloth 102 is used on the bottom surface of the reflective cloth 101. The size of the waterproof cloth 102 is the same as the overall size of the reflective cloth 101. The edges of the reflective cloth 101 and the waterproof cloth 102 are smoothly connected and fixed, with an opening on one edge, forming a sandwich between the two cloths. The reflective cloth 101 is the main visual interpretable feature of the luminous marking cloth 1. A transparent waterproof film 104 is pasted on its front side, that is, the entire outer surface of the marking cloth is covered with a transparent waterproof film 104, and the transparent waterproof film 104 is attached to the surface of the marking cloth.

[0039] Furthermore, in this embodiment, the waterproof cloth 102 has Velcro 105 on the side opposite to the reflective cloth 101. Specifically, the outermost back of the marker has several horizontal Velcro strips, wherein the A-side Velcro 105 is fixed to the back of the luminous marker cloth 1, and a B-side Velcro is provided to be aligned and pasted with the A-side Velcro 105. When the luminous marker cloth 1 is directly fixed to the tunnel wall for use, the B-side Velcro needs to be pasted to the tunnel wall first with an adhesive, and then the A-side Velcro 105 connecting the luminous marker cloth 1 is pasted to the B-side. In one embodiment, before photogrammetric data collection in the tunnel, i.e. before placing the control point markers, the B-side Velcro is prepared separately, and its back is pasted flat on the curved surface of the tunnel wall with adhesive. Then, the three horizontally fixed A-side Velcro strips 105 on the back of the luminous marker cloth 1 are pasted onto the B-side Velcro, and the luminous marker cloth 1 is adjusted to fit against the curved surface of the tunnel wall. The luminous marker cloth 1 is made of a material with moderate softness and toughness, which can conform to the curved tunnel wall and is not easily wrinkled or deformed. In this embodiment, the luminous marker cloth 1 is fixed by Velcro 105, which is convenient to place without damaging the inner wall of the tunnel, and is easy to place and use repeatedly. It is environmentally friendly, easy to use and low in cost.

[0040] Furthermore, the reflective fabric 101 in this embodiment includes four centrally symmetrical reflective areas. Adjacent reflective areas use two brightly colored, high-contrast fabric surfaces, while opposite reflective areas use the same color fabric surface. The fabric surface color within each light-emitting area is the same as the light-emitting color of the LED beads 103 disposed within that area. Thus, using two brightly colored, high-contrast fabric surfaces in adjacent reflective areas improves the reflective effect, facilitating clearer and more identifiable control point locations in low-light tunnel environments.

[0041] Specifically, in one embodiment, the reflective fabric 101 is square in shape, and the reflective area is evenly divided into four triangular areas by connecting the diagonals. The four triangular reflective areas of the reflective fabric 101 are distributed in alternating red and yellow colors. A 5cm wide plain-colored fabric is spliced ​​on the outside of the reflective areas. Several holes are evenly punched in each area of ​​the reflective fabric 101, and an LED soft light emission bead 103 of the same color as the fabric surface of that area is fixed in each hole. Preferably, six LED soft light emission beads 103 are evenly fixed in each triangular area, and the fabric surface of the reflective fabric 101 that contacts the back of each light emission bead 103 is perforated. The wires of the light emission beads 103 pass through the perforations and are placed in the interlayer between the reflective fabric 101 and the waterproof fabric 102, and are connected to a small power supply device 106.

[0042] LED light-emitting beads 103 are connected to wires and a power supply device 106 at the rear. In use, the wires and power supply device 106 can be placed within the interlayer between the reflective fabric 101 and the underlying waterproof fabric 102, or they can extend from the side of the luminous marker fabric 1. In one embodiment, the power supply device 106 is placed at the bottom of the interlayer between the waterproof fabric 102 and the reflective fabric 101, and the wires connecting the multiple light-emitting beads 103 are located within the interlayer between the waterproof fabric 102 and the reflective fabric 101, with the wires electrically connected to the power supply device 106. In another embodiment, the wires connecting the multiple light-emitting beads 103 are located within the interlayer between the waterproof fabric 102 and the reflective fabric 101, with one end of the wire extending from one side of the luminous marker fabric 1 and electrically connected to the power supply device 106. That is, the power supply device 106 can be connected to the wires of the light-emitting beads 103 through the openings on the sides of the reflective fabric 101 and the waterproof fabric 102, and is suspended on the outside of the luminous marker fabric 1. In this embodiment, when the light-emitting lamp 103 is damaged during use, the lamp can be replaced through the opening on the side of the reflective cloth 101 and the waterproof cloth 102.

[0043] Furthermore, the power supply device 106 in this embodiment is powered by a button battery. That is, a button battery is installed in the small power supply device 106, making the power supply device 106 powered by a button battery compact, portable, and easy to replace.

[0044] In this embodiment, after the photographic data collection for one section is completed, the luminous marker cloth 1 can be peeled off from the Velcro on side B and used to place markers in the next section using the same method, thus achieving the reuse of control point markers. After data collection is completed and tunnel impact matching and modeling are performed, the center of the reflective area of ​​the marker should be identified on the computer through visual interpretation, and the points should be reinforced and the aerial triangulation should be densified. This will control and correct the coordinates and shape of the model, improving the simulation accuracy of the model.

[0045] Example 2

[0046] Based on Embodiment 1, the control point marker in this embodiment further includes a simple frame 2. The periphery of the luminous marker cloth 1 is fixed to the simple frame 2, and the simple frame 2 is provided with a connection port 203 for connecting the base device. The base device can be a pole, base, tripod, etc. The luminous marker cloth 1 can be connected to the pole, base, tripod, etc. through the simple frame 2, and the luminous marker cloth 1 can be fixed and flattened. The luminous marker cloth 1 is supported by the simple frame 2, realizing the vertical and suspended arrangement of the control point marker.

[0047] In one embodiment, both the luminous marker cloth 1 and the simple frame 2 are quadrilaterals. The overall size of the simple frame 2 is the same as the fabric size of the luminous marker cloth 1. The four corners of the luminous marker cloth 1 are provided with fabric fixing holes 107. The four corners of the simple frame 2 and the positions corresponding to the fabric fixing holes 107 are provided with fixing holes 202. Fixing screws pass through the fabric fixing holes 107 and fixing holes 202 to fix the luminous marker cloth 1 and the simple frame 2.

[0048] In one embodiment, the simple frame 2 is assembled from stainless steel strips 201. A threaded connection port 203 is located on the lower side of the simple frame 2 and is compatible with threaded connectors on other uprights, bases, tripods, etc. Specifically, the main body of the simple frame 2 consists of five stainless steel strips 201 (two horizontal strips, two vertical strips, and one diagonal strip). Each stainless steel strip 201 has a fixing hole 202 at its overlapping ends, which is then secured with screws and nuts after alignment. A downward-facing threaded connection port 203 is fixed to the bottom center of the horizontal stainless steel strip 201 at the bottom of the simple frame 2. Therefore, the simple frame 2 in this embodiment is a detachable structure, allowing the individual stainless steel strips 201 that make up the frame to be disassembled and stored for easy transport.

[0049] When it is necessary to set up vertical or suspended control signs for control and measurement, first assemble the detachable simple frame 2 according to the above structure, align the four fixing holes 107 of the luminous sign cloth 1 with the four corner fixing holes 202 of the simple frame 2, and fix them with screws and nuts.

[0050] Select a suitable tripod, support rod, or other base, align and tighten the threaded connector at its top with the threaded connection port 203 of the simple frame 2, then move and place the base in the designated position, and use the control mark as described in Example 1.

[0051] The luminous marker cloth 1 in this embodiment, when used in conjunction with the detachable simple frame 2 and the base device, can be used to arrange and measure vertical and suspended control points, thereby expanding the application scenarios and fields. It has good adaptability and strong versatility, and the frame is simple and detachable, making it very convenient to carry when conducting field measurements.

[0052] The control point marker in this embodiment consists of two parts: a luminous marker cloth 1 and a detachable simple frame 2. It has the advantages of strong applicability, simple deployment and operation, good reusability, and no damage to the tunnel wall.

[0053] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A control point marker for tunnel image modeling, characterized in that, Includes luminous marker cloth; the luminous marker cloth includes: Waterproof cloth; A reflective fabric is layered on top of the waterproof fabric; the reflective fabric is equipped with multiple LED beads. A transparent waterproof membrane is layered on the reflective fabric; and, A power supply device for supplying power to the plurality of the light-emitting LED beads.

2. The tunnel image modeling control point marker as described in claim 1, characterized in that, The waterproof fabric has Velcro on the side opposite to the reflective fabric.

3. The tunnel image modeling control point marker as described in claim 1, characterized in that, The reflective fabric includes four centrally symmetrical reflective areas. Two adjacent reflective areas use two brightly colored and highly contrasting fabric surfaces, while two opposite reflective areas use the same color fabric surface. The fabric surface color in each light-emitting area is the same as the light-emitting color of the light-emitting LED beads set in that area.

4. A tunnel image modeling control point marker as described in claim 3, characterized in that, The four reflective areas of the reflective fabric are distributed in alternating red and yellow patterns.

5. A tunnel image modeling control point marker as described in claim 1, characterized in that, The power supply device is placed in the interlayer between the waterproof cloth and the reflective cloth, and the wires connecting the multiple light-emitting beads are arranged in the interlayer between the waterproof cloth and the reflective cloth. The wires are electrically connected to the power supply device.

6. A tunnel image modeling control point marker as described in claim 1, characterized in that, The wires connecting the multiple light-emitting LED beads are arranged in the interlayer between the waterproof cloth and the reflective cloth, and one end of the wire is led out from one side of the light-emitting marking cloth and electrically connected to the power supply device.

7. A tunnel image modeling control point marker as described in any one of claims 1-6, characterized in that, The power supply device is powered by a button battery.

8. A tunnel image modeling control point marker as described in any one of claims 1-6, characterized in that, It also includes a simple frame, the periphery of which is fixed to the simple frame, and the simple frame is provided with a connection port for connecting the base device.

9. A tunnel image modeling control point marker as described in claim 8, characterized in that, Both the luminous marker cloth and the simple frame are quadrilaterals. The four corners of the luminous marker cloth are provided with cloth fixing holes. The four corners of the simple frame are provided with fixing holes corresponding to the cloth fixing holes. Fixing screws pass through the cloth fixing holes and the fixing holes to fix the luminous marker cloth and the simple frame.

10. A tunnel image modeling control point marker as described in claim 9, characterized in that, The simple frame is made of stainless steel strips, and the connection port is located on the lower side of the simple frame and is a threaded connection port.

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