How to choose a suitable 3D vision sensor, we have some advice (Ⅰ)

Do you know how to choose a suitable 3D vision sensor?

With the advancement of the development process of the manufacturing industry, the complexity of the production process, the cumbersome degree of the process, and the speed of product iteration have reached a new height, and after solving the problem of recruitment gap and capacity efficiency with robots, how to achieve high-quality production, high-efficiency production, flexible production, etc. has posed challenges to automation.

In the past 40 years, with the rapid development of 2D industrial vision technology, robots have been able to complete repetitive work such as assembly, handling, and inspection with the assistance of machine vision, but with the enrichment of scenes, the application limitations have been continuously highlighted, and more targeted products and solutions are needed to break the technical barrier of 2D vision, 3D Vision technology came into being.

So, how to choose a suitable 3D vision product, what kind of scene needs to use 3D vision, we have a little suggestion, listen to us to give you nagging.

1. The necessity of using 3D vision

The first thing that must be admitted is that no single visual solution is a panacea, but we can surely find the most suitable.

Due to the long-term development and iteration, 2D visionhas become increasingly standardized in hardware design and software algorithms, and can cope with most production scene needs, but due to the limitations of imaging principles, it can only provide users with two-dimensional plane information of the target object (that is, X, Y axial information If you encounter a situation where you need to obtain depth information about the object, or locate or measure the volume on the surface, you will not be able to advance.

3D vision is currently the closest solution to the human eye, in addition to seeing the target object, it can also achieve positioning recognition in multiple dimensions. The actual industrial site is more complex than the scenarios listed below, users want to achieve intelligent production of robots in more scenes, the requirements for visual accuracy and beat are getting higher and higher, and the vision system as the eyes and brain of the robot   will inevitably develop rapidly under such demand-oriented, giving the robot deeper perception ability.

Scenes that 2D vision can't handle

a. When you encounter special-shaped workpieces, surface recognition, motion recognition, volume measurement, etc., and need to obtain depth (Z-axis) information

b. When there is spatial rotation of the workpiece, accurate positioning needs to obtain rotation angle (such as Rx/Ry/Rz) information

c. Unable to provide a high-quality, stable light source construction environment

d. A low-contrast (edge data) scenario similar to the black workpiece being measured on a black background

2. What workpieces can 3D vision be applicable to?

Different sizes

Large workpieces

Small workpieces

Thin pipe fittings

• Provide hardware and algorithm strategies of different specifications for workpieces of different sizes, sizes, thicknesses;

• ALSONTECH has the industry's largest baseline high-precision sensor AT-S1000-02A-W, which meets the user's requirements for one-time imaging of large-size workpieces, the maximum remote field of view can reach 3570 ×2877@3900mm, and still maintains millimeter-level accuracy, easily realizing the positioning and handling needs of large diesel engine sand cores and large stacks;

• The AT-S1000-07C, a high-precision grating structured light sensor with fast imaging of small workpieces such as bolts, obtains non-destructive point clouds at close range, and the accuracy can reach ±0.03mm, which meets the needs of precision assembly and other scenarios;

• It can extract the complete outer contour of the thin tube as thin as 0.7mm, and has the function of extracting the center of mass and the center of the circle, and guides the robot to complete the axial identification feeding.

Different characteristics

Shaped workpieces

Flat workpieces

Highly reflective tube fittings

• Provide hardware and algorithm strategies of different specifications for workpieces of different shapes and materials;

  ALSONTECH has the industry's only binocular laser product line AT-S1000-0XA, with a wide field of view covering a variety of sizes,

  without fear of workpiece reflection, and can obtain a complete high-quality point cloud with clear edge contours under strong light;

• The algorithm is complete, extracting the features of special-shaped workpieces, quickly matching, even if complex workpieces are placed disorderly,

  the optimal grabbing scheme can be obtained through offline simulation software, helping users quickly land projects, avoid operational risks, and reduce the investment of expensive tooling

Different colors

At the daily production site, in addition to the characteristics, materials, and sizes of workpieces, the appearance color is also different, and a qualified visual product should have the ability to identify workpieces of various colors. At present, all ALSONTECH products can accurately identify various colors, through the color card test, you can see that the obtained point cloud data is flat, without defects, and the most "light-absorbing" black is not a problem.

Swatch and point cloud effects

Application cases

• Large leaf spring loading--- AT-S1000-01A 3D vision system

Large field of view, high precision, one imaging to complete the workpiece positioning, parallel work high beat

• Highly reflective wheel parts loading---AT-S1000-04A 3D vision system

Line laser imaging, no fear of reflection, high precision, parallel work high beat

• Automotive headlamp loading and testing --- AT-S1000-01A 3D vision system

It can cope with the reflection of the plastic surface of the headlamp and complete the energization detection under complex structure

•Black engine block feeding--- AT-S1000-04A 3D vision system

The robot arm is mounted flexibly, and the pure black workpiece can be precisely positioned

• Small seal loading---AT-S1000-01A 3D vision system

Small black workpieces are stacked on top of each other, and the vision can cope with out-of-order grabbing

How to choose the right 3D vision product in a complex environment?

What process requirements can 3D vision meet?

Find the answer in   next article!