機電工程因其所包含的元件及設備種類多元、介面整合性及專業性高等特性，是為整個工程專案中較難以施作之工項，現今營造業缺工情形日益漸增，而當於現地進行機電工程之放樣作業時，需要多人協作測量進行放樣點位標註，因此所耗費之人力過多，除此之外目前現場施工還是大多仰賴2D平面圖及經驗使用傳統測量工具進行作業，且機電工程之施工圖複雜，可能會造成作業人員因圖紙標註不易理解、3D立體概念不足，造成放樣作業流程中費時費力，亦可能因介面整合不佳導致現場施作空間不足的問題發生，導致放樣點位測量之準確度降低，後續進行機電管線及設備安裝的施作則會因為誤差累加導致無法安裝到指定的位置，花費了更多時間進行修正導致工程成本提高亦或工期延宕等問題發生。
本研究為了使混合實境技術能夠有效輔助於機電系統放樣工程的施作流程，對管線擬定準確的放樣點位與施工輔助規劃，解決了放樣作業皆須多人協作的問題，亦結合了語音辨識、雲端資料即時資料庫等雲端應用，有效的協助作業流程的進行首先使用 IDEF0 解析機電系統放樣作業之資訊及操作需求、作業流程以及常見流程問題，建立符合吊架及施工架規範之系統，接著利用分析結果歸納出後續混合實境系統開發之功能需求並建構雲端資料庫流程，及與MR系統連結之規範，提出一套結合語音辨識及雲端應用之混合實境機電系統放樣工程施工作業系統，以符合機電系統放樣工程需求，提升BIM模型於現地之應用性外，並同時改善現地放樣作業之施作效率及準確率。

Mechanical and electrical engineering is a difficult project to implement in the entire engineering project due to the diverse types of components and equipment it contains, interface integration and high professionalism. In the staking operation of MEP system, multiple people are required to collaborate to measure and mark the staking points, so it consumes too much manpower. In addition, the current on-site construction still mostly relies on 2D plans and experience to use traditional measuring tools for operation, and MEP system. The complexity of the construction drawings may cause the operators to be difficult to understand due to the drawing annotations and the lack of 3D three-dimensional concepts, resulting in time-consuming and labor-intensive staking operations. It may also cause the problem of insufficient on-site construction space due to poor interface integration, resulting in staking points. The accuracy of the measurement is reduced, and the subsequent installation of mechanical and electrical pipelines and equipment will not be able to be installed at the designated location due to the accumulation of errors. It takes more time to make corrections, resulting in increased engineering costs or delays in the construction period.
In order to enable the mixed reality technology to effectively assist the implementation process of the MEP system stakeout project, this study formulates accurate stakeout points and construction assistance planning for the pipeline, and solves the problem that multiple people are required to collaborate in stakeout operations. Cloud applications such as identification and cloud data real-time database can effectively assist the operation process. First, use IDEF0 to analyze the information and operation requirements, operation process and common process problems of the mechanical and electrical system staking operation, and establish a system that meets the specifications of hangers and construction frames. Then, using the analysis results to summarize the functional requirements of the subsequent mixed reality system development and build the cloud database process, as well as the specification for connecting with the MR system, and propose a mixed reality MEP system staking engineering construction operation system combining speech recognition and cloud applications , in order to meet the needs of mechanical and electrical system staking engineering, enhance the applicability of the BIM model in the field, and at the same time improve the efficiency and accuracy of the on-site lofting operation.

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