High voltage transmission lines remote distance inspection system

In order to meet the demand of automation in high voltage transmission lines inspection and improve its precision, a remote distance inspection system is developed which is based on laser ranging and image processing technology. This system is used to detect the secure distance between transmission lines and object below it and scale of objects. Remote distance inspection system includes upper position computer and lower position machine. The lower position machine consisted of high revolution camera, two laser rangers, digital compass and GPS, these devices sent images, distance, attitude and location information to upper position computer. Measurement formulas derived from imaging principle. Upper position computer completes image process, measurement and other information management automatically. System structure is designed with light weight feature and total mass is 4kg, it is available on vehicle and unmanned aerial vehicle. System control software is developed with C++ language, inspection image and datum are recorded for the automated management. The system have been tested over a distance of 52m, 89m and 132m from objects, results show that the percent relative error is +1.9%, −2.2%, +2.9%, respectively. The high accuracy performance of this system is proved.