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基于电容式传感器的纸张数测量系统研究与设计

《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

Title:: Research and design of paper quantity measurement system based on capacitive sensor

作者:: 侯志伟1; 杜青青1; 包理群2; 1.兰州石化职业技术大学电子电气工程学院,甘肃兰州 730060；
2.兰州工业学院电子信息工程学院,甘肃兰州 730050

Author(s):: HOU Zhiwei1; DU Qingqing1; BAO Liqun2; 1.College of Electronic and Electrical Engineering, Lanzhou Petrochemical University of Vocational Technology, Gansu Lanzhou 730060;
2.College of Electronics and Information Engineering, Lanzhou institute of technology, Gansu Lanzhou 730050, China

Keywords:: paper quantity; micro-displacement; capacitive sensor; DDS module; STM32 processor; ADC sampling

摘要:: 针对两平行极板间距微位移的方法来测量纸张数的实际问题，该文提出了一种基于变极距型电容式传感器的测量系统。采用两块50 mm×50 mm单面覆铜板作为电容传感器探头，DDS模块产生的正弦激励信号经过两级集成运放放大和乙类推挽功率放大后加载至积分运放电路，进一步通过调理电路将输出的信号由STM32处理器片内ADC采样量化和数字滤波后计算出幅度值，根据标定不同纸张数的幅度值进行数据处理分析，从而得出待测纸张数量。实验结果表明，该纸张数测量系统综合准确率为99.6%，能够有效、准确地实现测量纸张数的实际工程应用需求。

Abstract:: In view of the practical problem of measuring the quantity of sheets by the method of micro-displacement of the distance between the two parallel polar plates, this paper proposes a measuring system based on the variable polar distance capacitive sensor. Two 50mmX50mm single-sided copper clad laminates are used as capacitive sensor probes. Load the sinusoidal excitation signal to the integrating circuit, generated by the DDS module, and amplified by two-stage integrated operational amplifier and class B push-pull power. The output signal is further converted by the conditioning circuit, calculated the amplitude value through the amplitude value of the calibrated different quantity of sheets, after on-chip ADC of STM32 processor sampling quantization and digital filtering, thus obtain the quantity of sheets to be measured. The experimental results show that the comprehensive accuracy rate of the paper quantity has reached to 99.6% using the measurement system, it can effectively and accurately meet the actual engineering application requirements of measuring paper quantity.

[1]田涵雨,田昌元,靳怡心,等.纸张计数系统设计[J].传感器与微系统,2021,40(08):85-87+91.

[2]邱华林,肖昌炎,蒋仕龙.最小曲率法与峰值检测相结合的纸张计数算法[J].电子测量与仪器学报,2017,31(09):1475-1480.

[3]王鑫,张子轩,张雨鑫,等.基于STM32和卡尔曼滤波的纸张计数系统设计[J].仪表技术与传感器,2021(04):93-96+101.

[4]戴嵘,肖昌炎.图像频域分析与相关性度量相结合的叠层纸张数量检测[J].中国图象图形学报,2016,21(12):1644-1651.

[5]叶慧雯,郭新年,季陈,等.基于机器视觉的答题卡计数系统[J].南京理工大学学报,2020, 44(05):608-613.

[6]薛龙辉,秦会斌,华咏竹.基于FDC2214纸张数量测量系统设计[J].传感器与微系统,2021, 40(06):95-97+100.

[7]刘波,谢锐.电容式扭矩传感器的微小电容检测系统设计[J].传感器与微系统,2022,41(01): 93-95+100.

[8]肖青伟,段发阶,黄婷婷,等.电容式高频振动幅值测量方法研究[J].仪表技术与传感器,2020(09):106-111.

[9]于殿泓,李晶.埋线探测系统的微小电容检测电路设计[J].传感器与微系统,2020,39(04):107-109+117.

[10]孙亚星,黄帅铭,王宇鹏,等.基于电容传感器的手势识别系统设计[J].自动化仪表,2020,41(02):10-13+19.

[11]胡惠文,魏榕山.基于Sigma-Delta调制的电容传感器设计[J].传感器与微系统,2019,38(06): 109-111+114.

[12]侯志伟,包理群.基于STM32的多重ADC采样技术研究与应用[J].工业仪表与自动化装置,2019(03):28-32.

备注/Memo:: 收稿日期：2022-03-02
基金项目：
甘肃省自然科学基金(20JR5RA377)；
甘肃省高等学校创新基金项目(2021A-224)；
甘肃省高等学校创新基金项目(2021B-392)
作者简介：侯志伟（1987），男，硕士，讲师，主要研究方向为数字信号处理及计算机应用技术。

更新日期/Last Update: 1900-01-01