CN-224203195-U - Slump detection device based on binocular vision

CN224203195UCN 224203195 UCN224203195 UCN 224203195UCN-224203195-U

Abstract

The utility model relates to the technical field of concrete detection, in particular to a slump detection device based on binocular vision, which comprises a test platform and a slump test cylinder, wherein the top end of the test platform is provided with scale marks for detecting slump, the two ends of the scale marks of the test platform are provided with telescopic components for synchronously lifting the slump test cylinder, the top end of the test platform is provided with a shooting component, and the opposite side of the shooting component is provided with a solid color background plate. The utility model adopts non-contact measurement, avoids errors caused by unstable contact or adhesion in the traditional contact measurement, can reduce interference to concrete, improves the stability and accuracy of measurement, and high-precision reading, namely, through the arrangement of a binocular camera and a pure-color background plate, the precision of slump reading can be improved by utilizing a multi-step image processing and matching algorithm, the slump measurement with high precision can be realized, and the requirement of high-precision detection is met.

Inventors

GAO FENG
Hong Quncun
GU JIANRONG
SHI JUNHONG
HONG PENG
Sha Wangjie
YANG WEI
WANG MINGYUAN

Assignees

上海环岛混凝土制品有限公司

Dates

Publication Date: 20260505
Application Date: 20250519

Claims (6)

1. The slump detection device based on binocular vision is characterized by comprising a test platform (7) and a slump test cylinder (4), wherein the top end of the test platform (7) is provided with a scale mark for detecting slump, the two ends of the scale mark of the test platform (7) are provided with telescopic components for synchronously lifting the slump test cylinder (4), the top end of the test platform (7) is provided with a shooting component for shooting concrete at multiple angles, and the opposite side of the shooting component is provided with a solid-color background plate (3).
2. The slump detection device based on binocular vision according to claim 1, wherein the shooting component is a binocular camera (1), and a plurality of characteristic points (5) used for positioning as a reference are arranged on one side end face of the solid color background plate (3) facing the binocular camera (1).
3. The binocular vision-based slump detection device according to claim 1, wherein the solid color background plate (3) is vertically arranged at the top end of the test platform (7) through a plurality of detachable connecting blocks.
4. The binocular vision-based slump detection device according to claim 1, wherein the telescopic component is a telescopic rod (2), a test barrel clamp (6) is detachably arranged on the outer side of the slump test barrel (4), and two ends of the test barrel clamp (6) are in transmission connection with the telescopic rods (2) on two sides respectively.
5. The binocular vision-based slump detection device according to claim 4, wherein a position sensor (8) is arranged on one side of the telescopic assembly, and the position sensor (8) controls the opening of the shooting assembly through a control module.
6. The binocular vision-based slump detection device according to claim 5, wherein when the bottom end of the slump test cylinder (4) is attached to the test platform (7), the sensing end of the position sensor (8) and the test cylinder clamp (6) are mutually extruded.

Description

Slump detection device based on binocular vision Technical Field The utility model relates to the technical field of concrete detection, in particular to a slump detection device based on binocular vision. Background In existing concrete slump tests, inaccuracy of manual readings and errors caused by contact measurements are major problems. The manual reading relies on measuring staff to measure the height difference between the height of the slump barrel and the highest point of concrete after slump by using a graduated scale after lifting the slump barrel, and the process is easily influenced by human factors, such as the angle of sight, the levelness or the verticality of the graduated scale, and the like, so that the reading error is larger. Differences in test procedures of different operators, such as the speed of the bucket and the swing amplitude, can also cause deviations in slump formation results. Furthermore, manual reading accuracy is typically only on the order of millimeters and is prone to error due to fatigue or inexperience. Contact measurement methods also have significant drawbacks. When the measuring tool is in direct contact with the concrete, pressure or disturbance may be applied to the concrete, resulting in deformation of the concrete, affecting the accuracy of the measurement results. Concrete may also adhere to the measuring tool, especially in the case of high-viscosity concrete, which adhesion phenomenon may further interfere with the accuracy of the measurement. These problems indicate that the conventional slump test method has obvious defects in terms of precision and stability, and is difficult to meet the requirement of high-precision detection. In the existing concrete slump test patents, a part of devices may cause a certain damage or interference to concrete, thereby affecting the accuracy of the test results. For example, some devices may cause deformation of the concrete surface or disturbance of the internal structure due to direct contact with the concrete when lifting the slump cone or measuring the concrete surface. Such contact measurements may not only change the natural slump state of the concrete, but may also introduce additional errors due to the adhesion between the measuring tool and the concrete. These problems make it difficult to meet the actual demands of contact measurement in a high-precision-required scene, and therefore, improvement of measurement means to reduce interference with concrete is an important direction of current research. Patent CN114858800a adopts a binocular vision method to detect concrete slump, and although an advanced image processing technology is utilized, some problems still exist in practical application. First, the point set constraints of this patent are inadequate, failing to adequately account for the impact of environmental factors on the measurement results. For example, in a complex field environment, light changes, background interference, and camera view angle deviation may all cause erroneous judgment, thereby affecting the accuracy of measurement. In addition, the patent may not accurately identify and match feature points when dealing with irregularities of the concrete surface, further reducing the reliability of the measurement. These problems indicate that although binocular vision has certain advantages, it still needs to be further optimized in practical applications to improve its robustness and measurement accuracy in complex environments. Therefore, it is necessary to invent a slump detection device based on binocular vision to solve the above problems. Disclosure of utility model In order to solve the defects of the prior art, the utility model aims to provide a slump detection device based on binocular vision, which solves the problem that in a complex field environment in the actual use process, factors such as light change, background interference, visual angle deviation of a camera and the like can cause misjudgment, thereby influencing measurement accuracy. In order to achieve the above object, the present utility model adopts the following technical scheme: The utility model provides a slump detection device based on binocular vision, includes test platform and slump test cylinder, test platform's top is provided with the scale mark that is used for detecting the slump, test platform scale mark's both ends are provided with the flexible subassembly that is used for synchronous lifting slump test cylinder, the shooting subassembly that is used for carrying out the multi-angle shooting to the concrete is installed on test platform's top, shooting subassembly's offside is provided with the solid background board. As a preferable scheme of the utility model, the shooting component is a binocular camera, and a plurality of characteristic points used for positioning as a reference are arranged on one side end surface of the pure-color background plate facing the binocular camera. As a preferable scheme o