P&IDSeg-Net：一种面向管道仪器图的轻量化分割网络

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中图分类号：TP39 文献标志码：A

DOI： 10.7652/xjtuxb202605022 文章编号：0253-987X（2026）05-0226-11

P&IDSeg-Net： A Lightweight P&ID Segmentation Network

WANG Chenxi1 ，YANG Tingting²，ZHANG Tao³，ZOU Yuchen1 ， SHAO Huikail ， ZHONG Dexing1 （1. School of Automation Science and Engineering，Xi'an Jiaotong University，Xi'an 7l0049，China; 2. Department of Digital Technology，China General Nuclear Power Group，Shenzhen，Guangdong 5180oo，China; 3.CGN Intelligent Technology （Shenzhen） Co.，Ltd.，Shenzhen，Guangdong 5180oo，China）

Abstract： To enhance the performance of intelligent segmentation for piping and instrumentation diagrams（P&IDs），a lightweight segmentation network named P&IDSeg-Net is proposed. First，a channel-halved non-local attention module was designed to establish global dependencies in deep feature space，addressing the structural confusion between pipelines and instruments. Second， feature addition fusion was employed instead of channel concatenation for skip connections， further reducing the parameter count and adapting to small-scale datasets. Then， based on the lowgrayness characteristic of pipeline regions in P&.IDs ，a visual prompt-inspired grayscale mask weighted loss was constructed to focus the network on key foreground areas. Finally，the P& ID _Pipe dataset was collcted and manually annotated，and extensive experiments were conducted on this dataset. The results show that the proposed P& IDSeg-Net requires only 2. 181×107 parameters，demonstrating significant lightweight advantages，while achieving a mean intersection over union of 77.40% . Compared with mainstream segmentation methods，it achieves superior performance.

Keywords： P& ID segmentation; non-local attention; visual prompt; lightweight network

在工业设施的全生命周期管理中，管道和仪器图（P&ID）等工程图纸是整个流程的核心，其包含设备间的连接关系、工艺逻辑等重要信息，既是施工建造的基准蓝图，又是设施运维阶段工艺优化、安全评估和资产管理的关键依据。（剩余17936字）