智能壓力傳感器系統設計

電子機電論文編號:JD705  論文字數:14044,頁數:34

第一章 引言 5
1.1 壓力傳感器概述 5
1.1.1 壓力傳感器的定義 5
1.1.2 壓力傳感器的分類 5
1.2 智能壓力傳感器的概述 6
1.2.1 智能壓力傳感器的定義 6
1.2.2 智能壓力傳感器的類型 6
1.2.3 壓阻式壓力傳感器的工作原理 7
1.2.4 智能壓力傳感器的功能 7
1.2.5 智能壓力傳感器的特點 8
第二章 設計總體方案介紹 9
2.1 設計目的 9
2.2 設計要求 9
2.3 設計方案 9
2.4 工作流程圖 11
第三章 各部分電路及元器件介紹 12
3.1 電源部分 12
3.1.1 三端穩壓器 12
3.2 信號放大部分 16
3.2.1 OP27運放芯片介紹 17
3.2.2 三運放拓撲儀用放大電路的工作原理 20
3.3  AD轉換及數據處理部分 22
3.3.1 AD574簡介 23
3.3.2 AT89C51單片機簡介 28
3.4 數據顯示部分 30
3.5 報警部分電路 31
附錄 32
附錄1 智能壓力傳感器電路原理圖 32
結 論 33
致 謝 34
參考文獻 35
書籍資料： 35
電子文獻： 35

摘要
隨著計算機測控系統特別是多傳感器計算機測控系統的發展，智能傳感器系統作為一個與之相應的新興研究方向，正受到人們越來越多的關注。然而，雖然近年來它的研究與開發已取得一定成果，但還遠遠不能滿足實際需求，尤其在壓力測量領域更是急待發展。隨著壓力測控系統的發展，現有的傳統壓力傳感器已無法滿足要求，而集信息采集、信息處理和數字通信功能于一身，能自主管理，具有智能化特性的智能壓力傳感器系統已成為生產實踐發展迫切需求。
本文對智能壓力傳感器系統理論及其在壓力測量方面的應用進行了深入研究，并對其智能化功能、硬件配置進行了全面的設計。系統采用集成度高，功能強大的新型微處理器控制，其內部集成了大量的模擬和數字外圍模塊,具有很強的數據處理能力。電路內配置了為實現多功能智能化所必需的硬件，并全部采用低價格、小體積器件，再與傳感元件組裝在一起，從而使整個系統在保證智能化功能的前提下，具有體積小、成本低、一體化和抗干擾能力強的特點。

關鍵詞：智能傳感器；壓力；微處理器,

Design of Smart Sensor for Pressure Measurement
Abstract

With the development of computer control system, especially of the system with multi-sensor, the intelligent sensor or smart sensor, as a new research field, is attracting more and more people's attention. Although some achievement in the field has been obtained recently, the results are far from application requirements, even worse in the measurement of pressure area. With the development of a pressure control system, the existing traditional pressure sensor has not met the need, however the smart sensor that has the functions of data collection, information processing, digital communication and self-governing has been imminent demand of the development of productive practice.
After the theory of smart sensors for pressure measurement has been deeply studied, and its overall design of intelligent functions and hardware are also described in detail in this paper. A microprocessor with powerful functions and higher integration is used as the main control unit. Large numbers of analog and digital peripheral circuits have been also integrated inside, so the microprocessor has the powerful ability of data processing. All components of the sensor, some of which are necessary for the multiple and intelligent functions, are selected ones with low cost and small package. All circuits are designed in a piece of PCB and the PCB is installed with the pressure detector together. The smart sensor then obtains the advantages of small dimension, low cost and higher anti-disturbance ability.

Keywords: smart sensor；pressure；microprocessor