Automated steering intelligence is actually data and networking. The basis for this is data acquisition, which is a critical step. Data acquisition usually relies on sensors or vision systems. The key part of the vision system is the high precision optical waveplate. Its performance is directly related to the sharpness of the image acquired by the data, and the definition directly affects the difficulty and accuracy of subsequent data processing. So let's talk about it today: optical lens.
Area array camera / line array camera
For still detection or general low speed detection, the area array camera is preferred, and linear array cameras are considered for special applications such as large-format high-speed motion or roller motion.
Optical lens resolution
The resolution actually refers to the number of camera pixels, which is usually tens of thousands of pixels, but in the detection, it is not necessary to pursue too high pixels, the pixel height will bring the frame rate down, the image processing is slow When selecting, it can be selected according to the accuracy requirements of the project. The accuracy of the project occupies 1 pixel in the image as the basic requirement, and the engineer with weaker software level can choose 3 pixels or more.
VUV grade LiF optics frame rate
Select the static detection as much as possible, so the cost of the whole project will be reduced a lot, but it will bring about a decline in detection efficiency. For those who have motion, use a frame exposure camera, and the line exposure camera will cause the image to be distorted. For the specific frame rate selection, High-speed cameras should be chosen blindly. Although high-speed cameras have high frame rates, they generally require externally enhanced light illumination. The high cost and image processing speed are also very stressful. It needs to be determined according to the relative motion speed, as long as it is within the detection area. The object to be measured can be captured, for example, the field of view with a length of 1 meter is observed, and the object to be measured passes through the field of view at a speed of 10 m/s, and the object to be measured can be completely captured at a speed of 10-12 frames per second. However, the same speed through the 0.1 meter field of view, you need a camera 100-120 frames / sec.
Optical lens color
In the industrial visual inspection, we generally recommend the use of black and white cameras, because software processing is generally converted to grayscale data for processing, and industrial color cameras are converted by Bayer algorithm, and there are certain colors with real colors. gap.
Optical lens chip type, size and pixel size
As far as the current industry status is concerned, for the case of high image quality requirements or poor ambient illumination, it is recommended to use CCD sensors and select optical waveplate manufacturer with larger pixel sizes. Of course, as the industry develops, the gap between CCD and CMOS is also In the gradual reduction, CMOS changes the resolution (ROI) more flexible, the same resolution, and higher speed.