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目錄第一章基本原理 ................................................... 1-1 1.1 感測器之一般概念 .............................................................. 1-1 1.2 感測器之線性特性 .............................................................. 1-3 1.3 信號處理電路 ...................................................................... 1-4 第二章基本原理與相關電路 ................................ 2-1 2.1 類比輸出型液位與壓力量測 ................................................ 2-1 2.2 ON/OFF 型液位量測 ............................................................ 2-4 2.3 數位式液位量測 (BCD 數字顯示 ) ......................................... 2-9 2.4 數位式液位量測 (8bit 數位輸出 ) .......................................... 2-12 2.5 流量率量測 ( 十進位數字顯示 ) ............................................. 2-14 2.6 流量率類比量測 .................................................................. 2-17 2.7 容量量測 ............................................................................. 2-19 2.8 液位和流量控制器 .............................................................. 2-20 2.9 電路校正 ............................................................................. 2-26 第三章程序控制 ................................................... 3-1 3.1 概述 .................................................................................... 3-1 3.2 控制系統設計 ...................................................................... 3-9 3.3 控制器設定調整 .................................................................. 3-14 3.4 比例控制器 ......................................................................... 3-16 3.5 PI 與 PID 控制器 ................................................................. 3-17
第四章特性實驗 ................................................... 4-1 4.1 液位感測器信號處理電路特性實驗 ..................................... 4-1 4.2 閾值檢測器之特性量測 ....................................................... 4-6 4.3 以示波器檢測閾值檢測器之特性 ......................................... 4-8 4.4 檢測閾值檢測器具磁滯時之特性曲線 .................................. 4-10 4.5 以單閾值檢測液位 .............................................................. 4-12 4.6 以磁滯檢測液位 .................................................................. 4-14 4.7 繪出電壓 / 頻率轉換器之特性 ............................................... 4-16 4.8 以七節顯示器為輸出之液位轉換器特性實驗 ....................... 4-19 4.9 類比 / 數位轉換器之分析 ...................................................... 4-22 4.10 以 8bit 數位輸出測量液位 ................................................... 4-25 4.11 流量率之量測 ...................................................................... 4-28 4.12 時基週期之量測 .................................................................. 4-31 4.13 頻率 / 電壓轉換器動作之檢查 ............................................... 4-33 4.14 以類比輸出分析流量率感測器 ............................................ 4-36 4.15 容積感測器之特性曲線實驗 ................................................ 4-39 4.16 流量與容積之關係 .............................................................. 4-42 4.17 比例控制輸出電壓波形及比例常數之量測 .......................... 4-45 4.18 積分器控制器輸出電壓波形及時間常數 .............................. 4-47 4.19 微分控制器輸出電壓波形及時間常數之量測 ....................... 4-49 4.20 比例 - 積分器控制器輸出電壓波形之量測 .......................... 4-20 4.21 PID 控制器輸出電壓波形之量測 ......................................... 4-53 4.22 閉迴路液位自動控制實驗 .................................................... 4-55 4.23 閉迴路流量率自動控制實驗 ................................................ 4-58
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