Visual inspection has been widely used in electronics manufacturing, automotive manufacturing, medical printing and other industries. In the visual inspection, the camera generally works in the trigger mode. The trigger signal can be given by software or given by hardware. Our motion control card PCI-9014 takes full advantage of its hardware location comparison triggering capabilities, enabling rapid trigger acquisitions to achieve high-speed detection.
First, cooperate with the area camera
System Overview
Detect the surface character of the chip in the smart watch. The chip is placed on a tray tray of different specifications. The XY platform is used to drive the camera to take a "bow" shaped path (Figure 1) to trigger the camera to take pictures at different positions.
Detect each chip surface character.
Figure 1: Tray tray path diagram (5×4)
Hardware Environment: Figure 2: Surface Character Detection Device
PCI-9014 motion control card, smart camera, Panasonic A5 servo driver and motor
Application principle:
Traditional detection method: The XY platform stops after moving to a fixed coordinate point.
Software trigger signal. Disadvantages: slow speed, low efficiency
Advantages of using PCI-9014: Position comparison triggering on hardware. In the points A and B, set the position of the point to be compared, fill in the position comparison FIFO, and then when the X axis moves from point A to point B at a speed of 3m/s, when the position in the FIFO is detected, The hardware immediately gives a trigger signal to trigger the camera to take a picture. Fast, efficient, and increased productivity.
Second, cooperate with the line camera
System Overview:
Head contour size detection
Hardware environment:
PCI-9014 Motion Control Card, Sentech 16K Line Array Camera, Panasonic A5 Servo Drive, External Encoder
Application principle:
The principle of the line camera: shooting multiple lines into a picture. PCI-9014's location comparison FIFO's fixed size is 512 location points, each case needs to trigger tens of thousands of points, so in the process of running the axis needs to use the thread to write the position comparison point continuously, and trigger the line array through position comparison. The camera takes every line of pictures.
Figure 3: Location comparison trigger
The detection precision of the product size in the inspection system is very high, about 5 u. In this case, an external encoder is used to transfer the relative displacement information of the product and the camera to the motion control card PCI-9014. The X-axis runs at a speed of 1M pps. A hardware trigger signal is given at each point (100 pulse intervals) to be photographed to trigger the camera to take a picture. The location of the hardware trigger is pre-written into the FIFO of the comparator. The hardware position comparison trigger speed is 100ns to trigger the camera to take a picture once, and the camera completes the dimension detection.
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