LabVIEW應用於自動化土壤三軸 K0試驗系統之開發

Development of an Automatic K0 Triaxial Testing System with LabVIEW

林琬芳(Wang-Fang Lin)

指導教授 ： 魏敏樺

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00269

摘要

隨著精密儀器和自動化控制科技的日新月異，著手進行三軸自動化系統的構建，以利工程實務上之需，是一項重大的突破，除了截取傳統三軸儀器的優點外，更利用先進的軟體撰寫，加深了自動化系統對大地工程界的影響。其中包含有硬體設備(感應、處理、控制單元)和管理軟體(計讀、分析、回饋)組合而成之伺服系統，以期在試驗上達到簡便、有效、精確的目的。土壤三軸 試驗是一門先進的試驗技術，國內針對此方向的研究甚少，但其重要性在大地工程的實務中已佔有不可輕忽的地位。
本研究先於本校自行研發一套可進行土壤 試驗之自動化三軸儀器。配合圖控程式LabVIEW7.1的數據擷取及回饋控制，達成在實驗室內模擬現地土層的自然壓密行為，以求得靜止土壓力係數 值。為保持試體側向不變形之 狀態( )，除了要選擇高解析度的量測儀器和控制系統外，對於偵測試體之體積變化、調整三軸室內之圍壓以及壓密速率和階段時間的決定將是本系統在籌組時所考慮的主要因素。此開發出來的系統具有人性化之操作介面，可以簡便快速方式實驗，而自行撰寫之軟體也能配合試驗者之需求，隨時依需要進行修改。結果顯示，此儀器可解決人為控制操作之不便，且提供較能符合試驗過程的需要之系統；試驗求得的 值，與Jaky提出的經驗公式比較，得到極高的可靠性，也證明本系統能實際應用於工程實務上。

關鍵字

LabVIEW自 ； 動化系統 ； 三軸試驗 ； 壓密

並列摘要

Abstract

Title: Development of an Automatic Triaxial Testing System with LabVIEW
School: National Taipei University of Technology, Taiwan
Institute: Civil and Disaster Prevention Engineering Pages: 148
Time: August, 2008 Degree: Master
Researcher: W. F. Lin Advisor: M. W. Gui

Keywords: LabVIEW, Automatic System, Triaxial Test,
K0 Consolidation

Due to the advancement of instrument action and automatic controlling technology, setting up an automatic triaxial testing system in a research laboratory is an important requirement. Laboratory triaxial testing is an advanced testing technique but it is rarely conducted in Taiwan but importance on Geotechnical Engineering project has been not neglect.
This reseach is to invent an Automatic traxial testing system. With graphic language LabVIEW that can use data get and controling test. It can simulate the behavior of natural consolidation of soil layers in the laboratory. It can get coefficient of earth pressure at rest value. Because of it must maintain the K0 condition of no lateral deformation ( ). Besides choose high resolution of measure instrument and controlling sytem, and to measure volume change of sample, to adjust chamber pressure of traxial cell, consolide rate and time of stage must be main factor during the develop system. This work interface of system is user-friendly, be able to use the way of simple and high-speed to test. The value of compare with Jaky equation, get higher dependability. It proves this system can apply to engineering project.

並列關鍵字

LabVIEW ； Automatic System ； Triaxial Test ； K0Consolidation

參考文獻

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