Abstract：The system is controlled by AT89C51 single chip microcomputer as the core, and is composed of self-made capacitive sensor, counting circuit and display circuit. The paper is placed between the two plates of the capacitive sensor to make the dielectric constant of the capacitive sensor change. The detection circuit is connected with the two plates of the capacitive sensor through two shielding wires to collect the changing pulse signal and generate the square wave signal with stable period through the oscillation circuit. Square wave enters the MCU to compile and count, and finally the digital tube displays the number of paper in a short time.The system is easy to control and operate, and can be used for small and medium-sized paper counting.
17A 520052；2017年度河南省科技攻关课题“大型多冰盘方冰制冰机的研发”，项目编号：172102210438；2020年度河南省高等学校重点科研项目“基于图像分析的数字图像作品自动评判系统研究”，项目编号：20B520027；河南省教育科学“十三五”规划 2019年度一般课题新工科背景下民办高校计算机类专业校企合作效能研究，项目编号：〔2019〕- JK G H Y B- 0361。
作者简介: 胡辉（1981-），男，河南邓州人，讲师，研究方向为电子及自动化控制技术。
引用本文:
胡辉. 基于单片机的纸张计数显示装置设计[J]. 电脑与电信, 2021, 1(7): 1-4.
HU Hui. Design of Paper Counting Display Device Based on Single Chip Microcomputer. Computer & Telecommunication, 2021, 1(7): 1-4.
2021, Vol. 1 
