庞昌乐,刘晓,陈理,刘良.基于LabVIEW的实验室厌氧发酵产气在线监测系统[J].农业机械学报,2016,47(10):215-220,301.
Pang Changle,Liu Xiao,Chen Li,Liu Liang.Online Gas Metering System for Laboratory Scale Anaerobic Fermentation Based on LabVIEW[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(10):215-220,301.
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基于LabVIEW的实验室厌氧发酵产气在线监测系统   [下载全文]
Online Gas Metering System for Laboratory Scale Anaerobic Fermentation Based on LabVIEW   [Download Pdf][in English]
投稿时间:2016-02-04  
DOI:10.6041/j.issn.1000-1298.2016.10.028
中文关键词:  厌氧发酵  微量产气  在线监测  LabVIEW
基金项目:国家高技术研究发展计划(863计划)项目(2012AA101803)
作者单位
庞昌乐 中国农业大学 
刘晓 中国农业大学 
陈理 中国农业大学 
刘良 南开大学 
中文摘要:针对实验室厌氧发酵试验周期长、产气速率低、人工测量产气量劳动强度大的问题,根据排水法原理,设计了基于LabVIEW软件平台的微量产气在线监测系统,实现了系统标定、测量液体自动添加和补充、产气量实时测量、累积产气曲线实时显示和监测数据自动存储等功能。厌氧发酵试验测试结果表明:在线监测数据与人工测量数据对比,相对误差平均值为-2.30%,相对误差最大值为-3.03%,该系统具有良好的准确度和稳定性,可满足实验室厌氧发酵试验微量产气实时监测的需求。
Pang Changle  Liu Xiao  Chen Li  Liu Liang
China Agricultural University,China Agricultural University,China Agricultural University and Nankai University
Key Words:anaerobic fermentation  low gas flow rate  online monitoring  LabVIEW
Abstract:Biogas yield represents a key parameter for evaluating the stability of fermentation process. In laboratory scale anaerobic fermentation experiments, the gas flow rate is generally low and the experimental period lasts long. In order to solve the problems of labor intensity and low efficiency caused by manual measurement, a system for online gas metering for low gas flow rate with high resolution and friendly interface was developed following the principle of liquid displacement. The system was designed based on the LabVIEW software. Various functions were achieved, including automatic calibration, automatic refilling the displaced liquid to compensate the loss from evaporation, real-time pressure and temperature compensation for volume, generating, displaying, storing accumulated gas production curve and data in real-time, etc. Finally, fermentation experiment was conducted to validate the system’s performance. Test results showed an average relative error of -2.30% and a maximum relative error of -3.03% compared with manual measurement, which indicated a high measurement accuracy of the system. Moreover, the results were stable even in the continuous long run for 80h, indicating a good performance at operational stability. In conclusion, the system can satisfy the need of real-time gas metering for laboratory scale anaerobic digesters, and it had great practical value.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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