Capturing and processing for large dimension measurement of large transformers

The CCD sensor is the important part of the automatic measurement system with high accuracy of direct pointing. Because the target of measurement system is the complicated silicon-steel sheet with no more than 0.5 mm thickness for the large transformer, the routine projection aiming cannot work easily for the complicated figure. For the measurement of large transformers´ silicon-steel sheet, a new aiming method with the CCD sensor is developed. In this method, the system´s aiming mechanism is the special CCD sensor, and the conventional aiming line is supposed as the virtual line and the center of CCD sensor´s picture is regarded as original of coordinate. The complicated images of large transformers´ silicon-steel sheet are captured fast by the CCD sensor and by image processing, and we can determine the edge, then the image can be processed as well as automatically by the error correction, so the aiming velocity and the accuracy are increased. At the same time, all the operations, such as image capture, image processing and control signal sending, are integrated in one operation environment, and the error correction calculation for the CCD sensor with fast aim is completed by computers automatically. The capturing and signal processing for large dimension measurement is very important and useful to the modern manufacturing industry and application. The image signal processing error correction method for CCD camerawork can overcome the artificial pointing error in the conventional method.