當今社會科技的飛速發(fā)展，智能和便捷已經(jīng)成為人們的日常訴求?，F(xiàn)在放大電路在使用過程中經(jīng)常出現(xiàn)故障，并且需要測試電路數(shù)據(jù)，但是大多數(shù)是手動進行測試，一定程度上影響了工作效率。

為了測量數(shù)據(jù)更安全更便捷，針對手動測試的不足，本設計做出了一種基于STC89C51的簡易電路特性測試系統(tǒng)。其技術上利用STC89C51單片機作為控制核心，由單片機中控模塊、ADC轉換模塊、顯示模塊、開關模塊、穩(wěn)壓模塊、濾波模塊和報警模塊組成。該系統(tǒng)主要實現(xiàn)給定放大電路參數(shù)（輸入阻抗、輸出阻抗、放大倍數(shù)）和元器件故障自動測試功能，彌補了手動測試的不足。

關鍵詞：STC89C51單片機；電路特性測試；便捷

ABSTRACT

With the rapid development of science and technology in today's society, intelligence and convenience have become People's Daily demands. Now the amplifier circuit often fails in the use process, and needs to test the circuit data, but most of the test is manually, which affects the work efficiency to a certain extent.

In order to measure the data more secure and more convenient, aiming at the shortcomings of manual testing, this design has made a simple circuit characteristic tester system based on STC89C51.Technically,?it?uses?STC89C51?MCU?as?the?control?core,?which?is?composed?of?MCU?central?control?module,?ADC?conversion?module,?display?module,?switch?module,?voltage?regulator?module,?filter?module?and?alarm?module.The?system?mainly?realizes?the?automatic?measurement?function?of?given?amplifier?circuit?parameters?(input?impedance,?output?impedance,?amplification)?and?component?faults,?which?makes?up?for?the?shortage?of?manual?testing.

Key words：STC89C51 microcontroller；Circuit?characteristic?test；convenience

第1章 前言....................................................... 1

? 1.1 研究背景....................................................... 1

? 1.2 發(fā)展前景....................................................... 1

第2章 設計內(nèi)容方案....................................................... 1

? 2.1 系統(tǒng)總體設計思路....................................................... 1

? 2.2設計方案....................................................... 2

第3章 系統(tǒng)硬件設計....................................................... 2

? 3.1 單片機中控模塊....................................................... 3

3.1.1 單片機引腳圖及引腳定義....................................................... 3

3.1.2最小系統(tǒng)....................................................... 5

? 3.2 數(shù)據(jù)轉換模塊....................................................... 6

3.2.1 ADC模數(shù)轉換電路原理圖....................................................... 7

3.2.2 ADC管腳定義....................................................... 7

? 3.3 顯示模塊....................................................... 7

3.3.1電子屏顯示模塊(LCD1602)....................................................... 7

3.3.2 LCD1602引腳定義....................................................... 8

? 3.4開關模塊....................................................... 8

? 3.5濾波模塊....................................................... 9

? 3.6 穩(wěn)壓模塊....................................................... 9

? 3.7 故障告警模塊...................................................... 10

? 3.8 總體設計...................................................... 11

第4章 系統(tǒng)軟件設計...................................................... 12

? 4.1 開發(fā)環(huán)境...................................................... 12

? 4.2 系統(tǒng)程序流程圖...................................................... 13

??? 4.2.1 顯示模塊流程圖...................................................... 13

??? 4.2.2 ADC0832數(shù)據(jù)讀取流程圖...................................................... 14

??? 4.2.3總體工作流程圖...................................................... 15

第5章 系統(tǒng)調試...................................................... 16

結論...................................................... 17

參考文獻...................................................... 18

致謝...................................................... 19

附錄...................................................... 20