量程0~5V直流数字电压表 - 图文

is responsible for Organization training, and implementation, and check; 12, master workshops annual economic indicators of implementation, reporting to financial health on a regular basis; 13, is responsible for the daily oversight in the allocation and use of funds; 14, responsible for all Department statistics, collecting, sorting, reporting of accounting reports; 15, the company responsible for the supervision of the Treasury, including the \d grade\y, a library of materials, products for regular inventory handling, sampling, storage monitoring, the picking work, and provide the inventory report, and make the appropriate accounting treatment; 16, responsible for waste and recycling, transportation and settlement; 17, is responsible for all product sales accounting functions; 18, responsible for the company's raw materials, auxiliary materials, account management; 19, is responsible for the flow of control of all assets of the company, according to the changes in accounting treatment offixed assets and assets to the departments responsible for clearing, settlement and asset monthly report submitted to the asset management section of the Finance Department of the company organized on a company-wide special inspection of asset management; 20, according to the company's business activities, monthly projects involved in the business activities of the company (including expenses, business management, cost control, cash flow, revenue, etc) financial analysis, provide a basis for decisions for the company, the business of the company responsible for monitoring, forecasting and risk analysis; 21, responsible for the settlement of transactions with the Bank; 22, is

电子作品设计报告

项目名称： 量程0~5V直流数字电压表 学 院： 机电工程学院 专 业： 应用电子技术 班 级: 姓 名： 学 号： 指导老师：

is responsible for Organization training, and implementation, and check; 12, master workshops annual economic indicators of implementation, reporting to financial health on a regular basis; 13, is responsible for the daily oversight in the allocation and use of funds; 14, responsible for all Department statistics, collecting, sorting, reporting of accounting reports; 15, the company responsible for the supervision of the Treasury, including the \d grade\y, a library of materials, products for regular inventory handling, sampling, storage monitoring, the picking work, and provide the inventory report, and make the appropriate accounting treatment; 16, responsible for waste and recycling, transportation and settlement; 17, is responsible for all product sales accounting functions; 18, responsible for the company's raw materials, auxiliary materials, account management; 19, is responsible for the flow of control of all assets of the company, according to the changes in accounting treatment offixed assets and assets to the departments responsible for clearing, settlement and asset monthly report submitted to the asset management section of the Finance Department of the company organized on a company-wide special inspection of asset management; 20, according to the company's business activities, monthly projects involved in the business activities of the company (including expenses, business management, cost control, cash flow, revenue, etc) financial analysis, provide a basis for decisions for the company, the business of the company responsible for monitoring, forecasting and risk analysis; 21, responsible for the settlement of transactions with the Bank; 22, is 一 方案论证：

方案一：最简单的方式就是采用ICL7106模数转换转换后直接显示，

方案二：被测电压经过ADC0804模数转换后,经过AT89S51的处理,显示于数码管上. 方案三：被测电压经过ADC0804模数转换后,其数值再经过缓冲器传送到AT89C51芯片内,经过处理将数值显示在数码管上 论证：

方案二、三都采用AT89S51作为控制，作为一种新型的处理器，可以通过智能的方式，可以进行扩展，而且能够具有自动控制功能。而方案一没采用控制，方案一可控性差，方案三有增加成本，所以选用方案二较为合适。

二 硬件设计及说明

1、原理图设计

R121KR131KR141KR1511K2+5VEBC2BC3C1+5V12RESETSW93EQ31+5VQ2Q1Q08+U11234567891011131215141617P10(T2)P11(T2EX)P12P13P14P15(MOSI)P16(MISO)P17(SCK)RESETP3.0(RXD)P3.1(TXD)P3.2(INT0)P3.3(INT1)P3.4(T0)P3.5(T1)P3.6WRP3.7RDX1X2VCCP0.0(AD0)P01(AD1)P02(AD2)P03(AD3)P04(AD4)P05(AD5)P06(AD6)P07(AD7)EA/VPP20(A8)P21(A9)P22(A10)P23(A11)P24(A12)P25(A13)P26(A14)P27(A15)PSENALE/PGND403938373635343332312122232425262728293020R4R5100R6100R7100R8100R9100R10100R11100100117421105310KR0aDPYabcfbgdeecdfdpgdpDS1aDPYabcfbgdeecdfdpgaDPYabcfbgdeecdfdpgaDPYabcfbgdeecdfdpgC2Y1C31918J121+5VC5SWC6+5V20321VinVrefVin6Vin(-)VccREFJ27Vin(+)8Vref9R110KR310KA-GNDlsbDB0DB1DB2DB3DB4DB5DB6msbDB7INTR18171615141312115123Vref/2194CLK-INU2R210KC410GNDCLK-RCSRDWR6

图 1 数字电压表原理图

is responsible for Organization training, and implementation, and check; 12, master workshops annual economic indicators of implementation, reporting to financial health on a regular basis; 13, is responsible for the daily oversight in the allocation and use of funds; 14, responsible for all Department statistics, collecting, sorting, reporting of accounting reports; 15, the company responsible for the supervision of the Treasury, including the \d grade\y, a library of materials, products for regular inventory handling, sampling, storage monitoring, the picking work, and provide the inventory report, and make the appropriate accounting treatment; 16, responsible for waste and recycling, transportation and settlement; 17, is responsible for all product sales accounting functions; 18, responsible for the company's raw materials, auxiliary materials, account management; 19, is responsible for the flow of control of all assets of the company, according to the changes in accounting treatment offixed assets and assets to the departments responsible for clearing, settlement and asset monthly report submitted to the asset management section of the Finance Department of the company organized on a company-wide special inspection of asset management; 20, according to the company's business activities, monthly projects involved in the business activities of the company (including expenses, business management, cost control, cash flow, revenue, etc) financial analysis, provide a basis for decisions for the company, the business of the company responsible for monitoring, forecasting and risk analysis; 21, responsible for the settlement of transactions with the Bank; 22, is

功能硬件分析：

该原理图由三个模块构成，51最小系统，ADC0804信号采集转换，数码管显示模块。 主要芯片51单片机AT89S52的P3口与ADC0804的输出口相连，用P1口作为输出与数码管相连，输出驱动信号，而用P0口的四脚输出扫描信号，整个芯片就这样控制着各个模块。

2、PCB设计 如图：

图 2 PCB设计图

三．软件设计及说明

用编程软件keil编写代码，系统程序的具体代码见附录1

is responsible for Organization training, and implementation, and check; 12, master workshops annual economic indicators of implementation, reporting to financial health on a regular basis; 13, is responsible for the daily oversight in the allocation and use of funds; 14, responsible for all Department statistics, collecting, sorting, reporting of accounting reports; 15, the company responsible for the supervision of the Treasury, including the \d grade\y, a library of materials, products for regular inventory handling, sampling, storage monitoring, the picking work, and provide the inventory report, and make the appropriate accounting treatment; 16, responsible for waste and recycling, transportation and settlement; 17, is responsible for all product sales accounting functions; 18, responsible for the company's raw materials, auxiliary materials, account management; 19, is responsible for the flow of control of all assets of the company, according to the changes in accounting treatment offixed assets and assets to the departments responsible for clearing, settlement and asset monthly report submitted to the asset management section of the Finance Department of the company organized on a company-wide special inspection of asset management; 20, according to the company's business activities, monthly projects involved in the business activities of the company (including expenses, business management, cost control, cash flow, revenue, etc) financial analysis, provide a basis for decisions for the company, the business of the company responsible for monitoring, forecasting and risk analysis; 21, responsible for the settlement of transactions with the Bank; 22, is 程序流程图如下：

display开始声明变量声明变量设定扫描信号读取ADC转换结果显示数据处理呼叫显示函数 主程序流程图读取显示区数组转换显示编码输出/延迟4个字？YES10次？YES返回NONO显示函数流程图

四．作品调试

1、测试仪器：万能表、稳压电源。 2、测试方法：测量法。 3、测试结果：

输入电压 输出电压 1 1.5 3 4 1.025 1.579 3.056 4.031 根据测试结果分析，输出的电压值要比输入电压值相对偏高（约0.1V），造成测量的精准度不高，输出电压不稳定，未达到产品的标准，造成其原因可能有以下两点： 1. 没有外加稳压电路，造成输入电压不稳定。

2. 制作工艺水平不高，电路设计不好，以致在电压过路时有干扰。 改进方法：

1.外加直流稳压系统，保证输入电压稳定。

2.提高制作水平，按产品要求设计电路，减小干扰。

心得与总结：

此次作品的设计，提高了我们电路设计和制作水平，积累了有效地制作和设计经验。经过各组员交流和讨论，虽然整体上未达到产品的标准，不过，用稳压电源提供工作电压时，测量电压是相当稳定，而且数码管显示明亮。此次作品的设计，提高了我们电路设计和制作水平，积累了有效地制作和设计经验，使我们在今后制作作品时更能考虑周到，为我们下个学期毕业设计奠定了一定的基础。

附录1：代码