Design of a adding liquid instrument control system for sample pretreatment

Authors

WANG Zheng-jia, School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068 , China ；Hubei Key Lab of Modern Manufacture Quality Engineering, Wuhan, Hubei 430068 , China
LV Zhao-xiong, School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068 , China ；Hubei Key Lab of Modern Manufacture Quality Engineering, Wuhan, Hubei 430068 , China
ZHAI Zhong-sheng, School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068 , China ；Hubei Key Lab of Modern Manufacture Quality Engineering, Wuhan, Hubei 430068 , China
ZHAO Hai-tao, Hubei Tri-Ring Forging Co., Ltd., Xiangyang, Hubei 441000 , China
HE Jia-qi, School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068 , China
WANG Chao, School of Mechanical Engineering, Hubei University of Technology, Wuhan, Hubei 430068 , China ；Hubei Key Lab of Modern Manufacture Quality Engineering, Wuhan, Hubei 430068 , China

Abstract

When manual testing food and chemical samples, there are problems such as large pretreatment errors and low efficiency. In order to solve those problems, a adding liquid instrument control system for sample pretreatment was designed. The system adopts PLC as the main controller, and the software and hardware of the system were designed according to the control demand analysis of the pretreatment instruments. Combined the characteristics of the S-type acceleration and deceleration algorithm and non-contact liquid addition method. By controlling the acceleration of the deceleration phase during the liquid addition process for the droplet hanging on the tip falling off better, a segmented motor control model suitable for adding liquid was proposed. Finally, the fitting analysis and error compensation were performed on the dosing volume. The experimental results showed that the adding liquid error is within ±0.5%. less than the specified ±1%, whitch satisfies the adding liquid precision requirements of the pretreatment instrument, and has 96 sample positions, which is suitable for pretreatment of large batches of samples.

Publication Date

4-28-2020

First Page

110

Last Page

114

DOI

10.13652/j.issn.1003-5788.2020.04.020

Recommended Citation

Zheng-jia, WANG; Zhao-xiong, LV; Zhong-sheng, ZHAI; Hai-tao, ZHAO; Jia-qi, HE; and Chao, WANG (2020) "Design of a adding liquid instrument control system for sample pretreatment," Food and Machinery: Vol. 36: Iss. 4, Article 20.
DOI: 10.13652/j.issn.1003-5788.2020.04.020
Available at: https://www.ifoodmm.cn/journal/vol36/iss4/20

References

[1] 刘家常,刘芳芳.仪器分析中的样品前处理技术[J].食品研究与开发,2012(9):236-238.
[2] 周晓萍,汪雨,邵鹏,等.高效前处理装置及快速检测仪器在第三方检测实验室中的应用[J].分析仪器,2017(5):77-80.
[3] 周洋平.高精度微量液体加样装置的设计[D].重庆:重庆大学,2013:8-9.
[4] 刘爽.全自动生化分析仪精密取样系统的研究与开发[D].沈阳:东北大学,2014:7-10.
[5] 田丹.全自动多通道高精度分液系统设计与实现[D].重庆:重庆大学,2017:18-22.
[6] 赵明俐.基于FPGA的自动加样器设计与实现[D].重庆:重庆大学,2015:6-8.
[7] 韩慧,倪荣军,孙计赞.基于PLC食品检测实验室自动加液装置的设计与实现[J].食品与机械,2014,30(1):130-132.
[8] 李湘伟,刘尉.基于PLC控制的全自动在线清洗系统的设计[J].食品与机械,2015,31(6):130-133.
[9] 肖亚男,周哲海,郭阳宽,等.非接触式微量加样方法研究[J].自动化仪表,2017,38(3):79-81.
[10] 李志杰,蔡力钢,刘志峰.加加速度连续的S型加减速规划算法[J].计算机集成制造系统,2019,25(5):1 192-1 201.
[11] 万娟,张莉,张冰洋,等.基于TMCM-6110和LabVIEW的全自动酶联免疫前处理仪的设计[J].制造业自动化,2016,38(10):1-6.