基于Pcap01模块电路的A4纸张页数测量系统  

A4 paper page number measurement system based on Pcap01 module circuit

作　　者：韩春杰[1] 姜继帅 袁建 荆国林[2] Han Chunjie;Jiang Jishuai;Yuan Jian;Jing Guolin(College of Physics&Electronic Engineering,Northeast Petroleum University,Daqing 163000,China;College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163000,China)

机构地区：[1]东北石油大学物理与电子工程学院,大庆163000 [2]东北石油大学化学化工学院,大庆163000

出　　处：《国外电子测量技术》2022年第1期76-80,共5页Foreign Electronic Measurement Technology

基　　金：黑龙江省高等教育教学改革项目(SJGZ20200035)资助。

摘　　要：根据生产生活需求设计一种基于Pcap01电容检测电路为核心的纸张测量系统,该系统采用STM32F103单片机作为主控芯片。介绍了电容测量原理及系统的软、硬件设计。装置外部的测量模块使用等面积的两块单面覆铜板作为检测电容的两级,纸张放置在两极板之间,电容检测电路就会测量出两极板间电容值的变化,再将电信号转换成数字信号通过SPI串行口通信传递给单片机进行处理,经过有限次的自校准学习,实现对不同数量的纸张进行精确测量,最终将处理完的结果在LCD12864液晶显示屏上显示。多次重复测量,最终结果的误差在可控范围内。通过曲线拟合得到拟合公式,表达出电容与纸张数之间的对应关系。实际测试表明,该装置系统完善、机械结构稳定、成本低廉、显示迅速、便于操作使用。According to the production and living needs,a paper measuring device based on Pcap01 capacitance detection circuit is designed,with STM32 F103 microcontroller as the main control chip.The principle of capacitance measurement and the hardware and software design of the system are introduced.The measurement module outside the device uses two single-sided copper clad plates of equal area as the two-stage capacitance detection.When the paper is placed between the two plates,the capacitance detection circuit will measure the change of capacitance value between the two plates,and then convert the electrical signal into a digital signal which is transmitted to the microcontroller through SPI serial port communication for processing.After limited self-calibration learning,accurate measurements of different amounts of paper are made,and the results of processing are displayed on the LCD12864 screen.Repeated measurements have resulted in a controllable error.Fitting formula is obtained by curve fitting,and the corresponding relationship between capacitance and paper number is expressed.The actual test shows that the device has perfect system,stable mechanical structure,low cost,fast display and easy operation.

关 键 词：纸张测量 Pcap01 STM32F103单片机 电容检测 曲线拟合 

分 类 号：TN710[电子电信—电路与系统]