The hardware of AOI detection equipment is generally divided into six parts:
1. Computer host, AOI equipment development, the computer is a rare resource, taking into account the stability of the equipment, and the earlier AOI equipment to the docking port special requirements, the market early AOI equipment is almost the same as the industrial control computer, referred to as industrial control Machines; the most famous in Guangdong province is Yanxiang. In recent years, with the development of computer technology, especially the popularity of usb2.0, and the status quo of the stability of domestic computer hardware, many manufacturers have considered the pressure of cost, and the development of computer technology, the configuration of the computer part basically. To align with commercial computers, out of AOI equipment also includes smt peripheral equipment such as wave soldering, reflow soldering and so on!
2. Cameras, AOI cameras are divided into line camera and area camera according to the mode of capturing images. Line scan camera is a progressive scanning method. The advantages of AOI using this type of camera are that the detection speed is relatively fast, there is no pause in the detection process, and the time is saved. The disadvantage is that the detection speed of a single small plate is relatively low. Slower; poorer image reproducibility, difficulty in adjusting the angle of lighting, and higher false positive rate; the area camera adopts a single image capturing method; the advantage is that the image is reducible, playing well. The light angle is easy to adjust and it is easy to get a clearer image. Therefore, most manufacturers of AOI on the market use the area camera.
3. The light source; The light source is the eye of the AOI device, and the quality of the light source is the first step in determining the strength of the AOI detection capability. At present, domestic AOI suppliers use color-coaxial bowl-shaped light sources on AOI equipment; the advantage is that the images are easier to distinguish clearly. Most foreign AOI equipment manufacturers use monochromatic coaxial bowl light sources; the advantage is that the images are more realistic. The AOI detection equipment of the line camera configuration we mentioned earlier uses an ordinary fluorescent light source, which is currently used by mainstream manufacturers.
4. The screw; AOI device transmission device generally consists of a screw and guide rails. Currently, there are two kinds of screw rods in the market: cast screw rods and grinding screw rods. The casting screw rods are easy to process and inexpensive. The AOI suppliers who require cost performance generally use it, and the grinding screw rods have high machining accuracy. The high cost is generally used in AOI devices that require high detection accuracy.
5. Motors; AOI currently uses three types of motors: linear motors, servo motors, and stepping motors; linear motors are highly accurate and expensive, and suppliers that use linear motors to configure AOI equipment are relatively few. Servomotor accuracy is second only to linear motors. It is the best choice for the mainstream AOI testing equipment in the market. Of course, there is no absolute, the accuracy of the stepping motor is low, but the price is very low, and the occasions and enterprises that do not require high detection accuracy are equipped with AOI equipment. When using a stepper motor.
6. The body; is the carrier of all components of the AOI equipment Some suppliers call the chassis or rack, etc., the role of a single, is a fixed AOI equipment components, hardware structure carrier to achieve AOI detection function
The above is part of the hardware structure of the AOI device. In the next section we will talk about the software structure of the AOI device.
For more information, please visit: Features of AOI Optical Inspection Technology
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