目录
第 1 章 绪论................................................................................1
1.1 选题背景与意义 ..............................................................1
1.2 电子秤的研究现状及发展趋势 .....................................1
1.3 本设计的主要工作 ..........................................................2
第 2 章 系统的组成及工作原理 ............................................3
2.1 系统的组成........................................................................3
2.2 系统的工作原理 ...............................................................3
第 3 章 系统硬件设计.............................................................4
3.1 主控芯片 STC89C52 单片机基本系统.........................4
..............................................................................................4
..............................................................................................4
..............................................................................................4
..............................................................................................5
3.2 A/D 转换芯片 HX711 接口电路的设计 ......................5
..............................................................................................6
..............................................................................................7
3.3 压电传感器的设计........................................................10
............................................................................................10
............................................................................................10
............................................................................................11
3.4 显示电路设计 ................................................................12
