赵燕东,梁超,杜升.基于含水率与温度补偿的土壤pH值在线实时检测系统[J].农业机械学报,2019,50(3):159-167.
ZHAO Yandong,LIANG Chao,DU Sheng.Online Real-time Detection System of Soil pH Value Based on Moisture and Temperature Compensation[J].Transactions of the Chinese Society for Agricultural Machinery,2019,50(3):159-167.
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基于含水率与温度补偿的土壤pH值在线实时检测系统   [下载全文]
Online Real-time Detection System of Soil pH Value Based on Moisture and Temperature Compensation   [Download Pdf][in English]
投稿时间:2018-09-26  
DOI:10.6041/j.issn.1000-1298.2019.03.017
中文关键词:  土壤; pH值  锑电极  在线实时检测系统  补偿  最小二乘法
基金项目:国家重点研发计划项目(2017YFD0600901)、北京市科技计划项目(Z161100000916012)和北京市共建项目专项
作者单位
赵燕东 北京林业大学
城乡生态环境北京实验室 
梁超 北京林业大学
林业装备与自动化国家林业局重点实验室 
杜升 北京林业大学
城乡生态环境北京实验室 
中文摘要:针对目前常用土壤pH值传感器在测量过程中受土壤含水率和温度影响较大的问题,设计了带有温度、含水率补偿模型的锑电极土壤pH值在线实时检测系统。利用最小二乘法对pH值和测量结果进行线性分析,补偿土壤pH值测量误差。试验结果表明,经过补偿之后,由温度和含水率变化导致的pH值测量误差至少可降低84.5%,pH值测量值随温度和含水率的变化幅度不超过±0.1。与市场产品ZD-18型土壤酸度计、HYSWR-ARC-12V型土壤含水率传感器、水银温度计对比研究得出,3项指标线性拟合决定系数均达到0.99以上。为了确保自然环境下土壤pH值测量的适用性,探索了系统在使用过程中土壤含水率的阈值与测量精度,表明在土壤体积含水率大于5%的情况下均可有效测量。试验表明,在pH值3.06~10.36范围之内,本系统可有效测量,检测误差为-1.53%~3.51%,满足土壤pH值实时在线测量要求。
ZHAO Y  ong  LIANG Chao  DU Sheng
Beijing Forestry University;Beijng Laboratory of Urban and Rural Environment,Beijing Forestry University;State Forestry Administration Key Laboratory of Forestry Equipment and Automation and Beijing Forestry University;Beijng Laboratory of Urban and Rural Environment
Key Words:soil  pH value  antimony electrode  online real time detection system  compensation  least square method
Abstract:With the rapid development of detection technology, a variety of pH value detection methods was invented. However, there were many pH value detection techniques, but few of them can be used in field. Thus a soil pH value online real time detection system in this situation was designed. It was found that the measurement of pH value sensor was greatly influenced by soil moisture and temperature. In order to reduce the influence of soil moisture and temperature on soil pH value measurement, a model of moisture and temperature compensation for pH value sensor was proposed. Soil pH value measurement values were linearly analyzed by the least square method with soil moisture and temperature. The results showed that the absolute error of pH value measurement caused by temperature and soil moisture was reduced by more than 84.5%, and the variation range of pH value measurement was not more than ±0.1. Compared with ZD-18 soil acidity meter, HYSWR-ARC-12V soil moisture sensor and mercury thermometer, three determinant coefficients were all above 0.99. It proved that the performance of the system was equivalent to mature products. In order to ensure the applicability of soil pH value measurement in natural environment, it was explored that the threshold of soil moisture for pH value sensor was effectively measured, which proved that the pH value sensor can be effectively used when the soil volume moisture was more than 5%. Experiments showed that the pH value sensor can be effectively measured in the range of 3.06~10.36, and the detection error was -1.53%~3.51%. The design of a high accuracy soil pH value online real time detection system was realized.

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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