Laser flight detection method and implementation for sag of electric power overhead cable

Abstract

The invention discloses a laser flight detection method and implementation for the sag of an electric power overhead cable, and the method comprises the steps: enabling a rotor aircraft to fly to a position above a detected overhead cable through an airborne laser radar / distance measuring sensor of the rotor aircraft, and carrying out the measurement; then screening measurement data, wherein the measurement data are used for calculating the sag of the aerial cable and the distance to the ground; 1) the measuring method for a certain measuring point of any cable includes the steps that the rotorcraft keeps the flight height and the flight speed unchanged, and transversely sweeps the cable at a constant speed in the flight detection plane in the direction perpendicular to the trend of the cable; meanwhile, the laser radar / distance measuring sensor emits a detection laser beam sequence which is perpendicular to the flight detection plane and faces downwards, and cable and obstacle height data below the flight detection plane are continuously obtained; and 2) measurement data is screened by using a fuzzy filter to obtain effective data.

Description

technical field [0001] The invention belongs to the application of unmanned aerial vehicles in the detection of overhead cables, in particular to a laser flight detection technology and implementation method for the sag of electric power overhead cables. Background technique [0002] Aerial cables are the main implementation form of power transmission lines, which have the characteristics of large span, long distance, wide coverage area, complex and diverse terrain and landform. The sag, height from the ground and its distribution of power cables will have a direct impact on the safe and stable operation of the power system, and are also important indicators for power line construction and system operation. There are many influencing factors, and the influencing mechanism is relatively complex. Abnormalities and changes such as the stress of the conductor, icing, ambient wind speed, topography of the covered area, and moving objects will cause obvious changes in the cable sa...

AI Technical Summary

Problems solved by technology

[0007] Typical position detection methods include image detection methods, global navigation satellite positioning detection methods, sonar / microwave detection methods, etc. These methods are less affected by terrain, landform, temperature, climate, span, etc., and the detection is convenient and efficient. It can achieve high precision; at the same time, there are problems such as complex operation and structure of the system, high cost, long-distance complex environment communication, high-precision GPS positioning system, and high-quality image acquisition and recognition algorithms and systems.

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