Design and experiment of a portable field steady-state rheometer of soil

ZHANG Guozhong; XIA Jingjiu; DAI Sheng; HUANG Enlin; JI Ruijie; CAO Yongkang; WANG Hongchang

doi:10.13300/j.cnki.hnlkxb.2026.03.028

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Design and experiment of a portable field steady-state rheometer of soil

Food science and agricultural engineering | 更新时间：2026-11-05

- Design and experiment of a portable field steady-state rheometer of soil
- Journal of Huazhong Agricultural University Vol. 45, Issue 3, Pages: 304-313(2026)
- 作者机构：
  
  华中农业大学工学院/农业农村部长江中下游农业装备重点实验室，武汉 430070
- 作者简介：
- 基金信息：
- DOI：10.13300/j.cnki.hnlkxb.2026.03.028
  CLC： S237
- Received：25 October 2025，
  
  Published：25 May 2026
- 稿件说明：
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张国忠，夏经久，戴胜，等.便携式田间土壤稳态流变测量仪的设计与试验［J］.华中农业大学学报，2026，45（3）：304‐313.

ZHANG Guozhong,XIA Jingjiu,DAI Sheng,et al.Design and experiment of a portable field steady-state rheometer of soil[J].Journal of Huazhong Agricultural University,2026,45(03):304-313.
张国忠，夏经久，戴胜，等.便携式田间土壤稳态流变测量仪的设计与试验［J］.华中农业大学学报，2026，45（3）：304‐313. DOI： 10.13300/j.cnki.hnlkxb.2026.03.028.

ZHANG Guozhong,XIA Jingjiu,DAI Sheng,et al.Design and experiment of a portable field steady-state rheometer of soil[J].Journal of Huazhong Agricultural University,2026,45(03):304-313. DOI： 10.13300/j.cnki.hnlkxb.2026.03.028.

摘要

为实现水田土壤流变特性的便携式快速准确测定，设计一种基于稳态剪切原理的便携式土壤稳态流变测量仪。该仪器由平行板式转子测量夹具、动态扭矩传感器、伺服电机及工控屏组成，基于“3/4

法”修正原理推导出修正公式，可测得被测土壤整体黏度；采用LabVIEW平台开发上位机进行数据采集与处理，可实现稳态速率扫描与稳态时间扫描2种测试模式。相同剪切条件下与实验室流变仪的对比试验结果显示，自研流变仪在传感、控制与信号采集环节具有良好的稳定性与准确性，能够有效反映被测土壤的本构关系及稳态流变特征。田间试验结果显示，在稳态时间扫描模式下，剪切应力随剪切时间延长呈幂函数形式衰减并逐渐稳定，反映土壤在连续剪切作用下的结构破坏与重排过程；在稳态速率扫描模式下，剪切应力随剪切速率增大先快速下降后趋于稳定，在70 s⁻¹与150 s⁻¹阶段，土壤表现出典型的剪切稀化特性。

Abstract

A portable steady-state rheometer of soil was designed based on the steady shear principle to achieve the portable，rapid，and accurate measurement of rheological properties of paddy soil.The instrument consisted of a parallel-plate rotor measuring fixture，a dynamic torque sensor，a servo motor，and an industrial control panel.A modified formula based on the 3/4

correction principle was derived to correct the non-uniform shear field in the parallel-plate configuration，allowing the measurement of the apparent bulk viscosity of the soil tested.LabVIEW platform was used to develop an upper-computer system to obtain and process data，and achieve two testing modes including steady-state rate sweep and steady-state time sweep.The results of comparative calibration test with laboratory rheometer under the same conditions of shear showed that the designed rheometer had good stability and accuracy in sensing，control，and signal acquisition，and can effectively reflect the constitutive relationship and steady-state rheological characteristics of the soil tested.The results of field test showed that the stress of shear decreased in a power function form with the increase of shear time and gradually approached a stable value under the mode of steady-state time sweep，reflecting the structural breakdown and rearrangement process of soil under continuous shear.The stress of shear initially decreased rapidly with the increase of shear rate and then tended to stabilize under the mode of steady-state rate sweep.The soil exhibited typical characteristics of shear-thinning at shear rate of 70 s⁻¹ and 150 s⁻¹.It will provide a reliable and repeatable experimental approach for investigating the steady-state rheological characteristics of paddy soil.

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