CN204720036U - Photoelectric detection teaching experiment platform - Google Patents

Abstract

The utility model discloses a photoelectric detection teaching experiment platform, which comprises a box body, a base is installed in the box body, a lifting table and a bracket are arranged on the base, T-shaped light source brackets are respectively installed at both ends of the base; a CCD camera is installed on the bracket , the CCD camera is connected to the image processing unit; the image plane of the CCD camera is parallel to the lifting platform and the optical axis of the CCD camera is perpendicular to the lifting platform; an LED area array light source is installed under the CCD camera, and the LED area array light source is installed on T On the type light source bracket, a point laser and a line laser are installed on the LED area light source. The lifting table of the utility model, on the one hand, is used as a placing platform, and on the other hand, cooperates with point lasers and line lasers to provide conditions for laser triangulation experiments and three-dimensional measurement experiments. The irradiation direction of the point laser and the line laser is consistent with that of the LED area light source, and the irradiation angle can be adjusted to ensure uniform illumination. The utility model has the advantages of simple operation, accurate observation and low cost, can fully exercise students' practical ability and improve teaching quality.

Description

Photoelectric detection teaching experiment platform

technical field

The utility model belongs to the technical field of machine vision image measurement and pattern recognition, in particular to a photoelectric detection teaching experiment platform.

Background technique

In recent years, with the rapid development of image recognition and processing technology, major universities have successively offered courses related to machine vision and image processing. This type of course requires students to study theoretically and use machine vision and image processing technology to solve some engineering problems, such as one-dimensional displacement measurement, object size measurement and recognition classification. However, most of the relevant teaching at present is only at the level of theoretical teaching, and there are not many conditions and environments for students to conduct experiments and operate them by themselves, resulting in students' lack of hands-on practical ability, which is not conducive to the quality of teaching.

Utility model content

Aiming at the deficiencies of the above-mentioned prior art, the utility model provides an innovative experimental platform for photoelectric detection teaching that can fully exercise students' practical ability, is simple to operate, low in production cost, and high in precision.

In order to achieve the above-mentioned technical purpose, the technical scheme adopted in the utility model is as follows:

A photoelectric detection teaching experiment platform, including a box body, a base is installed in the box, a lifting platform and a bracket are arranged on the base, T-shaped light source brackets are respectively installed at both ends of the base; a CCD camera is installed on the bracket, and the CCD camera and image The processing unit is connected; the image plane of the CCD camera is parallel to the lifting platform and the optical axis of the CCD camera is perpendicular to the lifting platform; an LED area array light source is installed under the CCD camera, and the LED area array light source is installed on the T-shaped light source bracket. Install point lasers and line lasers on the LED area light source.

The adjustment range of the lifting platform is 0.1mm-60mm.

Described support comprises vertical support and horizontal support, and the lower end of vertical support is fixed on the base, and the upper end of vertical support is equipped with horizontal support, and horizontal support moves up and down on vertical support, and CCD camera is installed on horizontal support, The CCD camera moves left and right on a horizontal support.

The utility model adjusts the best shooting position of the CCD camera through the left and right movement of the CCD camera on the horizontal support and the up and down movement of the horizontal support on the vertical support. The angle of the area array light source can make the photo effect better and make the observation more accurate. The utility model is provided with a lifting platform on the base that can be lifted and lowered with a certain precision in the vertical direction. On the one hand, it is used as a platform for placing observation objects, and on the other hand, it cooperates with point lasers and line lasers on the LED surface array light source. Laser triangulation experiment and three-dimensional measurement experiment provide conditions. The irradiation direction of the point laser and the line laser is consistent with that of the LED area light source, and the irradiation angle can be adjusted to ensure uniform illumination. The utility model has the advantages of simple operation, accurate observation and low cost, can fully exercise students' practical ability and improve teaching quality.

Description of drawings

Fig. 1 is the front view of embodiment 1.

Fig. 2 is the left view of embodiment 1.

Detailed ways

Embodiment 1: As shown in Figure 1-2, a photoelectric detection teaching experiment platform includes a box body 1, a base 2 is installed in the box body 1, and a lifting platform 3 and a bracket are arranged on the base 2. T-shaped light source brackets 6 are respectively installed at both ends of the base 2 .

Described support comprises vertical support 4-1 and horizontal support 4-2, and the lower end of vertical support 4-1 is fixed on the base 2, and the upper end of vertical support 4-1 is equipped with horizontal support 4-2, and horizontal support 4 -2 moves up and down on the vertical support 4-1, a CCD camera 5 is installed on the horizontal support 4-2, and the CCD camera 5 moves left and right on the horizontal support 4-2. Move left and right on the horizontal support 4-2 by the CCD camera 5 and move up and down on the vertical support 4-1 by the horizontal support 4-2 to adjust the best shooting position of the CCD camera 5. The CCD camera 5 is connected to the image processing unit 10 .

The image plane of the CCD camera 5 is parallel to the platform of the lifting platform 3 and the optical axis of the CCD camera 5 is perpendicular to the surface of the platform of the lifting platform 3 . An LED area array light source 7 is installed below the CCD camera 5 , and the LED area array light source 7 is installed on a T-shaped light source bracket 6 . A spot laser 8 and a line laser 9 are installed on the LED area array light source 7 . The irradiation direction of the point laser 8 and the line laser 9 is consistent with that of the LED area array light source 7 to ensure uniform illumination.

Wherein, the adjustment range of the lifting platform 3 is 0.1mm-60mm.

Described image processing unit 10 comprises four experimental modules, and the first experimental module is laser triangulation distance measurement, helps the student understand the principle and measurement system of single-point laser triangulation method distance measurement; The second experimental module is object length measurement, An innovative method of roughly measuring the length of an object is proposed to help students understand the calibration and image processing process in machine vision; the third experimental module is radius measurement, which helps students understand the application principles and methods of machine vision in three-dimensional measurement. And let students have a better understanding of camera calibration and image processing; the fourth experimental module is cotton recognition, which focuses on letting students learn the application of image processing in photoelectric detection. Each experimental module has a corresponding operation window.

The operation window of the laser triangulation ranging experiment module includes a code window and a processing result window, and the code window includes zero calibration and measurement.

The window of the object length measurement experiment module includes a code window, a parameter window and a processing result window, and the code window includes calibration and measurement.

The window of the radius measurement experiment module includes a code window and a processing result window. The code window includes internal calibration, external calibration, radius acquisition and processing results.

The cotton recognition experiment includes a code window, an image window and a processing result window, and the code window includes image acquisition and image processing.

Through these experiments, students can deeply understand and master the theoretical knowledge of machine vision and image processing technology in photoelectric detection in combination with applications, so that students can have a more intuitive experience of it, improve students' hands-on practical ability and innovation ability, and also cultivate students. Students explore their interest and ability to learn knowledge.

Embodiment 2: A kind of photoelectric detection teaching experiment platform, comprises box body, and base is installed in the box body, and lifting table and support are arranged on the base, and T-shaped light source support is respectively installed on the two ends of base; CCD camera is installed on the support, The CCD camera is connected to the image processing unit; the image plane of the CCD camera is parallel to the lifting platform and the optical axis of the CCD camera is perpendicular to the lifting platform; an LED area array light source is installed under the CCD camera, and the LED area array light source is installed on a T-shaped On the light source bracket, a spot laser and a line laser are installed on the LED area light source. Wherein, the adjustment range of the lifting platform is 0.1mm-60mm.

Claims (3)

1. A photoelectric detection teaching experiment platform, characterized in that: it includes a box body (1), a base (2) is installed in the box body (1), and a lifting platform (3) and a bracket are arranged on the base (2), and the base T-shaped light source brackets (6) are installed at both ends of (2); a CCD camera (5) is installed on the bracket, and the CCD camera (5) is connected to the image processing unit (10); the image plane of the CCD camera (5) is connected to the The table surface of the lifting table (3) is parallel and the optical axis of the CCD camera (5) is perpendicular to the table surface of the lifting table (3); an LED area array light source (7) is installed under the CCD camera (5), and an LED area array light source (7) It is installed on the T-shaped light source bracket (6), and a point laser (8) and a line laser (9) are installed on the LED area array light source (7). 2. The photoelectric detection teaching experiment platform according to claim 1, characterized in that: the adjustment range of the lifting platform (3) is 0.1mm-60mm. 3. The photoelectric detection teaching experiment platform according to claim 1 or 2, characterized in that: the support includes a vertical support (4-1) and a horizontal support (4-2), and the vertical support (4-1) The lower end is fixed on the base (2), the upper end of the vertical support (4-1) is equipped with a horizontal support (4-2), and the horizontal support (4-2) moves up and down on the vertical support (4-1), A CCD camera (5) is installed on the horizontal support (4-2), and the CCD camera (5) moves left and right on the horizontal support (4-2).