一种基于FlexiForce的多点阵列式压力采集系统
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摘要
设计一种基于FlexiForce薄膜式压力传感器多点阵列式采集系统。该系统将FlexiForce薄膜式压力传感器输出的阻值变化变为电压信号并具有一定的放大作用,同时支持多路选择功能,实现了8×8路压力采集。采用VC++编写上位机软件界面,显示压力数据及图像,最后导出数据对整个系统的性能进行评估分析。实验结果表明,系统电压值随着压力的增加而下降,压力的平稳增加和降低时不会出现跳跃、突变等现象,零压力时电压保持在5 V,最小电压值保持在1 V左右,经过计算,最终误差均满足FleixForce薄膜压力传感器1%的误差范围。
A multi-point array acquisition system based on the FlexiForce thin-film pressure sensor is designed. The system can convert the resistance output by the FlexiForce thin-film pressure sensor into voltage signals with a certain amplification.Meanwhile,the system can support the multichannel selection function and realize 8×8 channel pressure acquisition. The VC++is used to compile for the software interface of the upper computer,so as to display pressure data and image. The data is exported to evaluate and analyze the performance of the whole system. The experimental results show that the voltage value of the system decreases with the increase of pressure,phenomena like jump and mutation do not occur as the pressure increases or decreases steadily,the voltage maintains at 5 V when the pressure is zero,the minimum voltage value maintains at about 1 V,and the calculation results show that all the final errors are below 1%,which meets the error scope of the FleixForce thin-film pressure sensor.
A multi-point array acquisition system based on the FlexiForce thin-film pressure sensor is designed. The system can convert the resistance output by the FlexiForce thin-film pressure sensor into voltage signals with a certain amplification.Meanwhile,the system can support the multichannel selection function and realize 8×8 channel pressure acquisition. The VC++is used to compile for the software interface of the upper computer,so as to display pressure data and image. The data is exported to evaluate and analyze the performance of the whole system. The experimental results show that the voltage value of the system decreases with the increase of pressure,phenomena like jump and mutation do not occur as the pressure increases or decreases steadily,the voltage maintains at 5 V when the pressure is zero,the minimum voltage value maintains at about 1 V,and the calculation results show that all the final errors are below 1%,which meets the error scope of the FleixForce thin-film pressure sensor.
引文
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[11]王梦,葛斌,徐明哲,等.基于单片机的多通道足底压力采集系统设计[J].电子科技,2017,30(9):30?33.WANG Meng,GE Bin,XU Mingzhe,et al. Design of multi?channel thin film pressure sensor system based onPIC18F4550 platform[J]. Electronic science and technology,2017,30(9):30?33.
[2] ZANG Yaping,DI Chong’an,ZHU Daoben. Flexible suspend?ed gate organic thin?film transistors for multi?functional applica?tions[C]//Proceedings of the 6th International Conference onNanoscience&Technology. Beijing:[s.n.],2015:355?356.
[3]宋敬卫,付广春,马献国.基于STM32的多路电压采集研究[J].电子世界,2013(12):55?56.SONG Jingwei,FU Guangchun,MA Xianguo. Voltage acquisi?tion research based on STM32[J]. Electronics world, 2013(12):55?56.
[4]徐科军.传感器的线性度指标综述[J].电气电子教学学报,2016,38(4):70?71.XU Kejun. An overview for linearity indexes of sensors[J].Journal of electrical&electronic education,2016,38(4):70?71.
[5] YOU Minghui,YU Xinyu,SUN Qixiang,et al. Analysis anddesign of amplifying circuit resisting temperature disturbance ofthe food material electric heating equipment[C]//Proceedingsof the 4th International Conference on Machinery,Materialsand Information Technology Applications. Hampton:AtlanticPress,2016:842?845.
[6]邓重一.基于MPX2100型压力传感器的高精度数据采集系统[J].传感器世界,2005,11(3):29?33.DENG Chongyi. Design of high accuracy data collecting systembased on MPX2100 type pressure sensor[J]. Sensor world,2005,11(3):29?33.
[7]叶洪海,李丽敏.基于单片机的多路数据采集系统的设计与实现[J].佳木斯大学学报(自然科学版),2008,26(4):545?547.YE Honghai,LI Limin. Design and realization of multi?chan?nel data acquisition system based on single?chip microcomputer[J]. Journal of Jiamusi University(Natural science edition),2008,26(4):545?547.
[8]郭亨礼,林友德.传感器实用电路[M].上海:上海科学技术出版社,1992.GUO Hengli, LIN Youde. Practical circuit of sensor[M].Shanghai:Shanghai Scientific&Technical Publishers,1992.
[9]唐德礼,王襄.单片机学习机及编程器的设计与制作[J].现代电子技术,2005,28(12):117?120.TANG Deli,WANG Xiang. Designing on single chip microcom?puter learning machine and programmer[J]. Modern electronicstechnique,2005,28(12):117?120.
[10]唐国红.基于VC++的单片机编程器软件的设计[J].现代电子技术,2007,30(8):126?128.TANG Guohong. The software design of single chip program?mer based on VC++[J]. Modern electronics technique,2007,30(8):126?128.
[11]王梦,葛斌,徐明哲,等.基于单片机的多通道足底压力采集系统设计[J].电子科技,2017,30(9):30?33.WANG Meng,GE Bin,XU Mingzhe,et al. Design of multi?channel thin film pressure sensor system based onPIC18F4550 platform[J]. Electronic science and technology,2017,30(9):30?33.