Nuclear Power Plant Turbine Steam Humidity Measuring Method Based On Image Technology

Currently the world's nuclear power plants are commonly used in the pressurized water reactors (PWR) reactor, the boiling water reactor, a heavy water reactor, the reactor cooled fast reactor and improved. the most widely used pressurized water reactors. PWR type used in the steam turbine is saturated. Turbine, with the superheated steam gradually expanding their homework, lower pressure, the saturation region resulting from spontaneous condensation. some steam condenses into water, a very small drop in the form of suspension, forming wet steam.At present, the main tracer measurement, light scattering, thermodynamics and image measurement method. Image measurement using high-speed camera technology acquisition wet steam images using image processing method of obtaining water droplet diameter, speed, distribution parameters, which is the water droplet size map is the most direct and reliable technology. Image measurement is to detect and image as a vector to be used to transmit information, or the means of measurement.The article introduces the method of measuring image steam generator and steam turbine steam exports to the side and water droplet size measurement device Act. Detailed account of the principle of the optical microscope and camera system designed optical microscopy. And the use of objects away from the center optical method in to improve the accuracy of images; The small size also steam the rapid flow of water droplets. Dicam-Pro use high-speed camera image, it has a very short exposure time. Integrated Device also the image can be measured most of the drop diameter; To obtain the steam generator and steam turbine internal images use of a straight rod design a fiberoptic endoscopy and endoscopic probe. Papers image acquisition system design based on the DM642. Through digital video camera images to obtain the data interface, in order to reduce the data transmission and storage. JPEG still image compression standard used for the compressed image data compression method. Photo will be left after the pass through Ethernet Remote server. PC server for image analysis of the photo went through filtering, edge extraction and refining process, such as pretreatment, Binary again, closed the region to fill the boundary tracing, image segmentation, every drop of water can be treated, such as separation from the photos; Indirect measurement of the use of pixel drop diameter measurement, droplet size distribution histogram to map out steam. The final estimate of steam humidity and other parameters. Papers probe system and the image acquisition system designed for the image processing method has been validated, given by the steam out of steam and humidity drop size distribution started in the process.