"Machine vision led light source uses a lot, with since the 90s of the 20th century optoelectronics, automation and computer image processing technology rapid development, the machine vision led light source in including automobile manufacturing industry, many industries are more and more widely used. As a novel and practical sensing technology,image detection unit have in recent years to achieve product, some well-known manufacturers, such as American Cognex, Germany the Basler company have launched a variety specification is complete series of products, including LED light source, camera module, a processor and and the popularization and application of image detection technology is created favorable conditions. At the same time, the relevant standards promulgated not only regulate the production, but also for the user to select the appropriate detection unit in different situations, faster and better to provide a basis for systemdesign.
Compared to the, China in this regard is still in the initial stage, even in nearly 20 years obtained the rapid development of automobile manufacturing industry, the application of machine vision led light source is quite limited. However, the application of the new technology of LED light source in machine vision can be clearly seen through the following application.
Machine vision led light source is a important field of application is precision measurement of the detection system is mainly composed of optical system, CCD camera module and a computer processing system composition. The parallel beam from the LED source is illuminated to the detection part of the object, and the edge profile is made up of the mirror image and the image is processed by a computer to obtain the position of the edge of the object. If the object is to be measured to produce a displacement, and once again to measure the position of its edge, then the difference between the two position is the displacement. Obviously, if the two parallel edges of the object are measured in the same image, the difference between the two is the corresponding dimension.
The system very suitable for mass production of workpiece in online detection, especially when the measured object is small in size, shape is relatively simple, machine vision led light source can show its superiority. Electronic connector assembly comprises a connector of automobile electronic products is a typical example, their production efficiency and finished product size accuracy is higher, the former can reach hundreds of pieces per minute, followed the majority is in the order of magnitude of 0.01mm. Machine vision led light source to be measured, parts (PIN) the formation of image due to the strong contrast between its bright background, and has clear silhouette effect. Such an ideal image creates conditions for accurate measurement of the size and shape of the object.
Needs to be pointed out is, machine vision led light source while using the part by image edge detection, but according to the different situations of the workpiece, specific practices are still differences. The position information of the target parts (edge coordinates and starting corners) will be transmitted to the computer processing system to make the appropriate evaluation.
Camera module image detection technology for another instance is used in precision measurement tool preseter in. The traditional detection method is the combination of optical projection and grating digital display, which is used for targeting, which is used for measuring and reading. The whole process needs more manual participation, the operation personnel requirements are high, the efficiency is low. The new tool, which was born a few years ago, has been combined with the LED light source, grating technology, computer software and hardware, automatic control technology and so on, which makes the traditional work way has been changed. And the main reason is that the machine vision LED light source instead of the traditional optical projection, which completely changed the original work mode.
In this novel instrument, as in axial movement guide Z, X and C (rotary) were equipped with a linear and circular gratings, measured the tool along the center line of the turntable (c axis) 0 installation. Machine vision LED light sensor is located in the fork on both sides, which is across the center line of the turntable. A LED light source is placed at one end of the bracket, and the other end is a camera module, which is read by the camera.
Detection of surface defects in the mass production of automobiles, motorcycles, such as internal combustion engine industry. So far, the artificial visual approach. This method is not only low efficiency, high labor intensity, and the specified in the standard process of quantitative assessment requirements is often difficult to accurately perform, thus influence effective supervision on the quality of the products.We are focus on the special LED and application module on the medical lighting and UV market.please contact us:kevin@sunerled.com or http://www.sunerled.com/English/