Target device applied to machine vision measurement

Abstract

The utility model provides a target device applied to machine vision measurement, which comprises a fixing structure, the upper end of the fixing structure is detachably connected with a prism and an infrared reflection device, and the lower end of the fixing device is slidably connected with a first fixing piece and a second fixing piece. The target device is connected with the lower observation point position through the first fixing piece and the second fixing piece, single-machine-head three-dimensional displacement monitoring is achieved by arranging the prism and the infrared reflection device, the number of purchased movable machine vision mechanisms is effectively reduced, the cost is saved, and the deployment difficulty is lowered; effective analysis and calculation of large deformation such as deformation of small earth and rockfill dams and foundation pit cofferdams and slope instability can be realized; by arranging the movable first fixing piece and the movable second fixing piece, the device is suitable for measuring point positions under different conditions, and a professional observation pillar does not need to be arranged.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering measurement and monitoring technology, and in particular to a target device applied to machine vision measurement. Background Technology

[0002] The most fundamental characteristic of machine vision systems is that they improve production flexibility and automation. Machine vision is often used to replace human vision in hazardous working environments where manual operation is unsuitable or where human vision is insufficient. Furthermore, in large-scale, repetitive industrial production processes, machine vision inspection methods can significantly improve production efficiency and automation.

[0003] In the field of water conservancy engineering monitoring, hydraulic structures deform under their own weight due to soil consolidation and rheological properties of rockfill. Excessive deformation can lead to defects such as uneven settlement and cracks. Most large and medium-sized reservoirs have surface deformation monitoring facilities (observation piers) and conduct regular manual observations using total stations and levels. The accuracy of these observations is generally sufficient for dams with shorter lengths and stable bedrock on both banks, but lower for longer dams. Small reservoirs, however, generally lack other monitoring facilities besides water level gauges, and often suffer from a situation where facilities are available but no one is monitoring them. Surface deformation monitoring is primarily done manually. Therefore, reservoir projects generally suffer from insufficient safety monitoring facilities, inability to function properly, and low levels of automated monitoring.

[0004] Some reservoirs have implemented automated monitoring of surface deformation, such as image recognition-based deformation monitoring methods. These methods require a fixed camera, a target at the monitored area, and video surveillance to record images. Image recognition technology is then used to compare the target's positional changes over a period of time as the deformation at the measurement point. This automated method is relatively inexpensive and can clearly record the entire trajectory change of the measurement point to a certain extent. However, its drawback is that existing single-head recognition only measures displacement in two directions (up / down and left / right for images), lacking observation of the target's distance relative to the camera head. Therefore, it cannot simultaneously measure three-dimensional displacement with a single camera head (at least two movable cameras are needed to calculate the displacement), resulting in high costs and complex deployment. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a target device for machine vision measurement, which can solve the problem that traditional targets generally only observe the displacement of measuring points in two directions when applied to single-head recognition.

[0006] Therefore, the present invention adopts the following technical solution:

[0007] A target device for machine vision measurement includes a fixed structure, the upper end of which is detachably connected to a prism and an infrared reflector, and the lower end of which is slidably connected to a first fixing member and a second fixing member. The target device is connected to a lower observation point through the first fixing member and the second fixing member.

[0008] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0009] The fixed structure includes a target support rod, a target base is fixed to the lower end of the target support rod, and a target connecting frame is fixed to the upper end of the target support rod. One end of the target connecting frame is connected to the prism through a first connecting rod, and the other end of the target connecting frame is connected to the infrared reflecting device through a second connecting rod.

[0010] The target base is provided with a first limiting groove and a second limiting groove located on both sides of the target support rod. The first fixing member is slidably connected in the first limiting groove, and the second fixing member is slidably connected in the second limiting groove.

[0011] The target connecting frame, the target support rod, and the target base together form an "I" shaped structure, and the prism and the infrared reflecting device are symmetrically arranged about the target base.

[0012] The prism is threadedly fixed to the first connecting rod, and the infrared reflecting device is threadedly fixed to the second connecting rod.

[0013] The first fixing member and the second fixing member are threaded to the lower observation point.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: by setting a prism and an infrared reflection device to realize three-dimensional displacement monitoring of a single head, the number of movable machine vision mechanisms purchased is effectively reduced, saving costs and reducing deployment difficulty. It can effectively analyze and calculate large deformations such as deformation of small earth-rock dams, foundation pit cofferdams, and slope instability. By setting movable first and second fixing parts, it can adapt to different measuring point locations and does not require the setting of professional observation piers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a top view of the upper structure of this utility model.

[0017] Figure 3 This is a bottom view of the lower structure of this utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting this utility model. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] The present invention provides a target device for machine vision measurement, including a fixed structure. The upper end of the fixed structure is detachably connected to a prism 3 and an infrared reflector 8. The lower end of the fixed structure is slidably connected to a first fixing member 5 and a second fixing member 9. The target device is connected to the lower observation point through the first fixing member 5 and the second fixing member 9.

[0021] The fixed structure includes a target support rod 4, a target base 6 is fixed at the lower end of the target support rod 4, a target connecting frame 1 is fixed at the upper end of the target support rod 4, one end of the target connecting frame 1 is connected to a prism 3 through a first connecting rod 2, and the other end of the target connecting frame 1 is connected to an infrared reflecting device 8 through a second connecting rod 7.

[0022] The target base 6 is provided with a first limiting groove 10 and a second limiting groove 11 located on both sides of the target support rod 4. A first fixing member 5 is slidably connected in the first limiting groove 10, and a second fixing member 9 is slidably connected in the second limiting groove 11.

[0023] The lower observation points can be observation piers, wave walls, slopes, foundation pits, tunnels, etc. The selection of points is based on the actual shape and installation surface characteristics of the observation points. Therefore, the first fixing component 5 and the second fixing component 9 are designed to slide on the target support rod 4 to adjust the fixed position, without the need to set up professional observation piers. Due to the different observation environment, accuracy and objects, the size of the prism 3 and infrared reflector 8 can also be selected according to the actual situation. At the same time, the equipped fixing structure can be adjusted according to the actual situation of the project.

[0024] The target connecting frame 1, the target support rod 4, and the target base 6 together form an "I" shaped structure, and the prism 3 and the infrared reflector 8 are symmetrically arranged about the target base 6.

[0025] In this embodiment, the first connecting rod 2, the second connecting rod 7 and the target connecting frame 1 at the top can be formed by welding or by an integrated structure.

[0026] Prism 3 is threadedly fixed to the first connecting rod 2, and infrared reflector 8 is threadedly fixed to the second connecting rod 7, facilitating assembly and disassembly.

[0027] The first fixing component 5 and the second fixing component 9 are threaded to the lower observation point, which facilitates assembly and disassembly and can adapt to any form of measuring point fixing.

[0028] The measurement process of the target device applied to machine vision measurement according to this utility model is as follows:

[0029] A mobile or fixed machine vision head (single head) captures images of the target device of this invention. Image recognition technology identifies the images of the prism 3 on the target at different observation times. By comparing the images before and after, the two-dimensional deformation values ​​of the target within the image range (which can be considered as the up-down and left-right directions) are calculated. An infrared emitter and a ranging calculation program are integrated on the single head. The infrared emitter emits infrared rays to the infrared reflector 8, thereby calculating the distance between the single head and the target device of this invention, thus obtaining the third-dimensional displacement data (which can be considered as the front-back direction). By comparing the difference in the distance between the two points at different observation times, the displacement change of the target during this time period is obtained. By integrating the above three-dimensional displacement deformation, three-dimensional deformation monitoring of the single head is realized.

[0030] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the target device of this utility model for machine vision measurement, and can produce the positive effects described in this utility model.

[0031] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "connected," and "sleeve-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism 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. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0033] Furthermore, in practicing the claims of this utility model, those skilled in the art can understand and influence variations to the disclosed embodiments through a study of the drawings, the disclosure, and the appended claims. Additionally, in the claims and description, words such as "comprising" and "containing" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are covered by the scope of the claims of the present utility model, and will not be listed here.

Claims

1. A target device for machine vision measurement, comprising a fixed structure, wherein a prism (3) and an infrared reflector (8) are detachably connected to the upper end of the fixed structure, and a first fixing member (5) and a second fixing member (9) are slidably connected to the lower end of the fixed structure, and the target device is connected to the lower observation point through the first fixing member (5) and the second fixing member (9).

2. A target device for machine vision measurement according to claim 1, characterized in that, The fixed structure includes a target support rod (4), a target base (6) is fixed at the lower end of the target support rod (4), a target connecting frame (1) is fixed at the upper end of the target support rod (4), one end of the target connecting frame (1) is connected to the prism (3) through a first connecting rod (2), and the other end of the target connecting frame (1) is connected to the infrared reflecting device (8) through a second connecting rod (7).

3. A target device for machine vision metrology as claimed in claim 2, wherein, The target base (6) is provided with a first limiting groove (10) and a second limiting groove (11) located on both sides of the target support rod (4). The first fixing member (5) is slidably connected in the first limiting groove (10), and the second fixing member (9) is slidably connected in the second limiting groove (11).

4. A target device for machine vision measurement according to claim 2, wherein, The target connecting frame (1), the target support rod (4), and the target base (6) together form an "I" shaped structure. The prism (3) and the infrared reflector (8) are symmetrically arranged about the target base (6).

5. A target device for machine vision measurement according to claim 2, wherein, The prism (3) is threadedly fixed to the first connecting rod (2), and the infrared reflecting device (8) is threadedly fixed to the second connecting rod (7).

6. A target device for machine vision measurement as claimed in claim 1, characterized in that, The first fixing member (5) and the second fixing member (9) are threaded to the lower observation point.

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