A comprehensive detection system for high-speed guardrails

Abstract

The utility model discloses a kind of comprehensive detection systems for high-speed guardrail. The system is installed on highway guardrail production line, including front detection system and 3D scanning detection system;The front detection system is used to measure the width and thickness of raw material board, including thickness detection unit and width detection unit;The 3D scanning detection system is used for full-size detection after high-speed guardrail production is completed.The utility model realizes the multi-dimensional size detection of guardrail from raw material to shaped part, effectively solves the problem of low detection efficiency and incomplete data in the prior art, while reducing manual intervention, improving the measurement accuracy, reliability and stability of detection data, and providing quantitative data support for guardrail quality control and construction installation.

Description

Technical Field

[0001] This utility model belongs to the field of product size inspection technology, specifically relating to a comprehensive inspection system for highway guardrails. Background Technology

[0002] Currently, there are various technologies and methods for testing the specifications and dimensions of highway guardrails. These existing technologies have played an important role in quality control, construction and installation, and safety assurance of highway guardrails, but they also have certain limitations.

[0003] Manual visual inspection and measuring tool testing: Inspectors directly observe the appearance defects of the guardrail panels with the naked eye, such as scratches and deformations; and use measuring tools such as micrometers, thickness gauges, and calipers to measure the key dimensions of the guardrail panels. This inspection method is inefficient and cannot meet the rapid inspection needs of guardrail panels on large-scale highway sections; the inspection results are greatly affected by human factors, resulting in limited inspection accuracy.

[0004] Two-dimensional vision inspection: This method uses an industrial camera to capture two-dimensional images of the guardrail, and then analyzes the images using image processing algorithms to identify surface defects, edge contours, and other information. However, this method is limited to detecting planar information of the guardrail and cannot acquire three-dimensional data in the height direction. It also struggles to accurately detect defects with depth variations (such as depressions and protrusions). Furthermore, it has limited ability to describe the overall shape and spatial relationships of the guardrail, and cannot comprehensively assess its installation accuracy and spatial orientation.

[0005] Non-destructive testing: Technologies such as ultrasonic testing and magnetic particle testing identify specific types of defects inside and on the surface of guardrails through physical characteristics. However, they cannot cover appearance quality, dimensional accuracy, and overall shape assessment. Furthermore, the testing process is complex and relies on professional personnel, making it unsuitable for large-scale rapid on-site testing. Utility Model Content

[0006] To address the problems of low dimensional inspection efficiency, large human error, and incomplete inspection coverage in existing highway guardrail inspection methods, this utility model provides a comprehensive inspection system for highway guardrails, which can achieve efficient, accurate, and comprehensive inspection of guardrail specifications and dimensions.

[0007] The comprehensive testing system for highway guardrail panels is installed on the highway guardrail panel production line and includes a pre-testing system and a 3D scanning testing system. The pre-testing system measures the width and thickness of the raw material panels, including a thickness measurement unit and a width measurement unit. The 3D scanning testing system performs full-size testing on the highway guardrail panels after production is complete.

[0008] The thickness detection unit consists of three sets of point laser displacement sensors and laser diodes, symmetrically arranged above and below the conveying path of the raw material sheet before rolling.

[0009] The width detection unit is a set of linear laser displacement sensors, arranged directly above both sides of the raw material plate.

[0010] The 3D scanning and inspection system consists of three linear guide rails and three 3D scanners mounted on and sliding along them. The three linear guide rails are arranged parallel to the short side of the guardrail, along both ends and the middle of the long side of the guardrail, on the frame of the palletizer. The three 3D scanners slide along the linear guide rails to scan and obtain information on aperture diameter, aperture position, corrugation size, and angle.

[0011] This invention enables multi-dimensional dimensional inspection of guardrail panels from raw materials to finished products, effectively solving the problems of low inspection efficiency and incomplete data in existing technologies. At the same time, it reduces manual intervention, improves the measurement accuracy, reliability and stability of inspection data, and provides quantitative data support for guardrail panel quality control and construction installation. Attached Figure Description

[0012] Figure 1 Schematic diagram of a comprehensive testing system for highway guardrails; Figure 2 Diagram showing the installation location of the thickness detection unit; Figure 3 Diagram showing the installation location of the width detection unit; Figure 4 A schematic diagram of the installation of a 3D scanning and inspection system; In the diagram: 1-thickness detection unit, 2-width detection unit, 3-3D scanning detection system, 4-3D scanner, 5-roller press, 6-palletizer. Detailed Implementation

[0013] Example 1 See Figure 1-4 The comprehensive inspection system for highway guardrail panels in this embodiment is installed on the highway guardrail panel production line and includes a pre-inspection system and a 3D scanning inspection system. The pre-inspection system is used to measure the width and thickness of the raw material panels, including a thickness detection unit and a width detection unit. The 3D scanning inspection system is used to perform full-size inspection after the highway guardrail panels are produced.

[0014] The thickness detection unit consists of three sets of point laser displacement sensors and laser diodes, symmetrically arranged directly above and below the conveying path of the raw material sheet before rolling. The working principle of the thickness detection unit is as follows: the laser diode projects a visible light spot onto the surface of the sheet; the light reflected (diffusely reflected) from the spot forms an image within the sensor. When the sheet thickness changes, the distance difference between the sensor and the object being measured causes a corresponding change in the laser reflection angle, resulting in a change in the imaging position within the sensor, thereby calculating the sheet thickness data.

[0015] The width detection unit consists of a set of line laser displacement sensors, arranged directly above both sides of the raw material sheet. The line laser displacement sensor is based on the principle of laser triangulation measurement, performing two-dimensional contour detection on the sheet surface. A lens amplifies the laser beam to form a static laser line, which is then projected onto the sheet surface. A receiving lens group projects the diffuse reflection light from this laser line onto a CCD array, recording the sheet width dimension in real time.

[0016] The 3D scanning and inspection system consists of three linear guide rails and three 3D scanners mounted on and sliding along them. The three linear guide rails are arranged parallel to the short side of the guardrail, along both ends and the middle of the long side of the guardrail, on the frame of the palletizer. The three 3D scanners slide along the linear guide rails to scan and obtain information on aperture diameter, aperture position, corrugation size, and angle.

Claims

1. A comprehensive testing system for highway guardrails, characterized in that, The system is installed on the highway guardrail production line and includes a pre-inspection system and a 3D scanning inspection system. The pre-inspection system is used to measure the width and thickness of the raw material panels, including a thickness detection unit and a width detection unit. The 3D scanning inspection system is used to perform full-size inspection after the highway guardrail panels are produced.

2. The comprehensive testing system for highway guardrails according to claim 1, characterized in that, The thickness detection unit consists of three sets of point laser displacement sensors and laser diodes, symmetrically arranged directly above and below the conveying path of the raw material sheet before rolling.

3. The comprehensive testing system for highway guardrails according to claim 1, characterized in that, The width detection unit is a set of linear laser displacement sensors, arranged directly above both sides of the raw material plate.

4. The comprehensive testing system for highway guardrails according to claim 1, characterized in that, The 3D scanning and detection system consists of three linear guide rails and three sets of 3D scanners mounted on them and sliding along them; the three linear guide rails are arranged on the frame of the palletizer, parallel to the short side of the guardrail and at both ends and the middle of the long side of the guardrail.

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