Abstract: Considering the non-contact characteristics of safety monitoring for cultural heritage buildings,this paper proposes a non-contact continuous monitoring method.The method first establishes a 3D virtual spatial grid according to the specific conditions of the monitoring object,then constructs a rigorous surveying reference network based on the strict spatial geometric relationships between the spatial grid and ground monitoring benchmarks.Continuous monitoring is achieved using the non-contact measurement function of high-precision total stations.The deformation of monitoring points corresponding to spatial grid nodes is determined through the rigorous spatial geometric relationships between spatial grid nodes and ground benchmarks,combined with distance changes from each measurement.Simulations and actual monitoring cases verify the feasibility and effectiveness of this method,which provides a practical monitoring solution for cultural heritage monitoring.This method is also applicable to continuous monitoring of other similar buildings and structures.

Key words: non-contact, continuous monitoring, 3D virtual spatial grid