Research on 3D reconstruction technology of large‐scale substation equipment based on NeRF

Abstract

The high‐quality 3D model is the key to digital twin and visualization. Here, the neural radiation field (NeRF) is applied to greatly improve the speed and accuracy of 3D reconstruction of large‐scale substation equipment. The incremental SFM algorithm is used to accurately position the camera in open scenes, and the frame extraction experiment indicates that the single angle increment should not be greater than 8°. The reconstruction test is carried out on the power transformer and high‐voltage experimental equipment following the circular shooting track for instant‐NGP (a variant of NeRF). Compared with the traditional 3D reconstruction method, the speed of reconstruction is accelerated by 23–55 times, and the fidelity is improved by 2–3 times. Also, the deployment scheme of NeRF in the digital twin technology of large‐scale substation equipment is proposed. The experimental results verify the effectiveness and feasibility of NeRF in practical application.

3D Reconstruction of Ancient Buildings Using UAV Images and Neural Radiation Field with Depth Supervision

“…S(x, y) = σ xy + C 3 σ x σ y + C 1 (10) where µ denotes the mean, σ denotes the variance and C 1 , C 2 and C 3 denote the constants used to keep the formula stable; the σ x σ y in the above formula is calculated as follows:…”

“…2024, 16, 473 2 of 23 made 3D solid building reconstruction a reality. However, existing tilt photogrammetrybased 3D reconstruction methods are slow and entail substantial time overheads [10]. Dense reconstruction, which involves matching all or most of the pixels in multiple images, demands extensive data processing and often redundant computations, resulting in an overall low reconstruction efficiency.…”

Immovable Cultural Relics Preservation Through 3D Reconstruction Using NeRF

“…NeRF in Substation Equipment: In the field of substation equipment, Shaotong Pei [8] has proposed the application of NeRF for the reconstruction of large-scale substation equipment. In the context of the digital twin architecture, data visualization plays a crucial role in displaying the sensing and simulation data through a 3D model of power equipment.…”