1、 本本 科科 毕毕 业业 设设 计 (论文)计 (论文) 学 院 电气与信息工程学院 专 业 电气工程及其自动化 I 单相液晶双向电能表单相液晶双向电能表 Single-phase LCD two-way watt-hour meter 摘摘 要要 该系统主要由显示模块、键盘模块、时钟模块、存储模块、通讯模块、CPU 模块、CS5460A 电能表芯片模块和前端电路调理模块部分组成。前端电路调理模 块采用 220V/5V 的电压互感器和 50A/25mA 电流互感器和精密电阻实现对市电的 转换,并采用 RC 滤波网络滤波,然后采用由美国 CRYSTAL 公司的新型电能计量 芯片 CS5460 芯
2、片实现对电流、电压和电能的测量与转换;时钟模块采用 DS1302 时钟芯片为系统提供时钟基准,存储模块采用 AT24C02,为系统提供数据存储; 显示模块用 LCD12864 液晶,指示模块使用 LED 发光二极管,指示正向电能和负 向电能,通信模块采用 Max485 芯片,并利用 MSP430 组成的 CPU 模块控制所有芯 片的工作、测量、计算电能,送往显示模块和存储模块进行实时显示和存储。 关键字:关键字:CS5460A;MSP430;485 通讯;LCD12864;DS1302 II Abstract This system is mainly revealed the module,
3、 keyboard module, clock module, store module, communicate module, CPU module, CS5460A electric energy meter chip module and front circuit look after the part of the module to make up. The front circuit recuperates the module and adopts electric current mutual inductor and 220V/5V electric current mu
4、tual inductor and accurate resistance of 50A/25mA to realize the conversion of the city electricity, and adopt RC to strain the wave network and strain the wave, then adopt measure chip, CS5460 of chip, realize to electric current, voltage, measurement and conversion of electric energy by new electr
5、ic energy of Company, CRYSTAL of U.S.A.; The clock module adopts DS1302 clock chip to offer the clock basis for system, stores the module and adopts AT24C02, offer the data for system to store; Reveal the module uses LCD12864 liquid crystal, Instruction module USES LED light emitting diode, instruct
6、ions, positive electricity and negative electricity ,the communication module adopts Max485 chip, and utilize CPU module that MSP430 makes up to control the work of all chips; Measure, calculate electric energy, send to is shown the module and stores the module and pays revealing and storing in real time. Keywords: CS5460A; MSP430; 485communication;LCD12864;DS1302 III 目目 录录 第一章第一章 绪论绪论 -