The Transmission Line Protection System Based On 3D-Imaging Ladar And CT Energy Harvesting Technology

The transmission line security is threatened greatly by external destruction.However,the existing transmission lines prevention methods cannot achieve automatically and real-time detection.In terms of this issue,the thesis puts forward a transmission line protection method based on laser ranging and image processing,and the real-time detection system including hardware and software system is implemented.The external destruction detection prototype has also been manufactured.With the prototype,lots of imaging experiments has been carried out.The experiment results indicate that the transmission line protection system can detect the target automatically and in real-time.Firstly,the related theory and technology of imaging ladar has been analyzed in this dissertation.Then discussed the three different kinds of ranging methods.Including laser triangulation method,pulsed laser ranging method,phase laser ranging method,and the dissertation adopts pulsed laser ranging mode.In order to reduce the measuring error,a reflected laser discriminating method has been proposed.Secondly,Combined with the image processing theory and the paired-sample t-test theory,a target auto-recognition method has been proposed in the parameter space based on the point cloud data.A distance transform algorithm has been proposed to transform the original data into a depth-image.Then the image processing theory is discussed in detail.In order to detect the target automatically,the image registration method based on features has been proposed.On the basis of the analysis above,a kind of image registration algorithm based on Hough transformation has been put forward,establish the model of similarity measurement.Finally,the CT energy harvesting device is developed based on the analysis of the output power characteristic.The real-time detection system including hardware and software system is developed.To test the target automatic recognition effect and the imaging effect,lots of imaging experiments has been carried out with the prototype.In the experiments,take the objects such as buildings and engineering trucks as the imaging target.The depth-image has not been distorted compared with the actual objects.The results shows that the real-time transmission line protection system can automatic detect the target successfully.