Measuring soil compaction and soil behavior under the tractor tire using strain transducer

Shahgholi, Gholamhossein; Abuali, Mohammadreza

doi:10.1016/j.jterra.2015.02.007

Cited by 26 publications

(17 citation statements)

References 9 publications

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“…From Figure 9, the deformed body at the HST1 under the different speed was found that the lateral deformation reduced when the speed increased (6.5 and 8 km/h) and the total average difference deformation rates (compared with 5 km/h) were 2.1% and 4.8%, respectively. This result was in accordance with the research of Shahgholi and Abuali [11]. The maximum shear strain during the front wheel moved over the SST and the 2 HSTs was greater owing to the soil structure was loose (bulk density # 1 g/cm 3 ), so the soil was easier compression and obviously differed from the rear wheel.…”

Section: Velocity Effects Upon Soil Properties and Stress-strain Relationssupporting

confidence: 90%

“…The results showed that the initial applied pressure, from the circular plate at the center, was less and the rotation angle of HST remained unchanged until the compression force reached to 40 kPa, the angular displacement would be increased (HST2) and decreased (HST1) stability in the range of 130-300 s (Figure 6). The values of the 2 HSTs in Figure 6 were manifested opposite directions due to the lateral soil movement [11]. At the one quarter from the center of the soil box, the circular plate could cover the left and right of the HST1 (Figure 3(a)) and found that the most soil surface around the HST1 was strongly vertical sank and the occurrence of the lateral displacement appeared slightly when the higher load was applied.…”

Section: Validation and Evaluation The Hstmentioning

confidence: 98%

“…Wiermann et al [10] took the displacement transducer system (DTS) associated with the SST to estimate the soil movement while the machinery that had the various dynamic loads moved and indicated that the soil was displaced in both vertical and horizontal directions. The linear potentiometer was mounted at the end-plate and put down following the mutually orthogonal system [11]. From this procedure, there was no significant difference between the bulk density that measured by the potentiometer and the core sampling.…”

Section: Introductionmentioning

confidence: 99%

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Design of horizontal shear strain instrument for co-estimation of soil stress-strain

Kulketwong

Thungsotanon

2020

E3S Web Conf.

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This study aimed to design and fabricate the horizontal shear strain transducer (HST) for measuring the soil strain under the agricultural machinery traffic by using a rotary potentiometer which was an angular strain change detector. The angular movable mechanism was calibrated and evaluated the characteristics of the instrument in the laboratory, and found that the non-linearity and the hysteresis were 4.56 and 4.42%, respectively. Furthermore, the strain measurement device was buried in the field to compare the shear strain at varying tractor velocities (5, 6.5 and 8 km/h). For all vehicle speed at the first passage, the shear strain and soil bulk density obviously increased, whereas the final moisture content decreased; as a result, the lower velocity caused higher shear strain.

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Section: Velocity Effects Upon Soil Properties and Stress-strain Relationssupporting

confidence: 90%

Section: Validation and Evaluation The Hstmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Design of horizontal shear strain instrument for co-estimation of soil stress-strain

Kulketwong

Thungsotanon

2020

E3S Web Conf.

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“…For a tractor driving on the soft soil, the lower the inflation pressure in the tires is, the shallower the track and the lower the rolling resistance are. With enlargement of the contact area between tires and soil, the tractor has less negative impact on the soil, and the result is less compacted soil under the tracks (Ani et al 2018;Shahgholi, Abuali 2015).…”

Section: Literature Reviewmentioning

confidence: 99%

Impact of the Inflation Pressure of the Tires on Lead of Front Drive Wheels and Movement Resistance Force of Tractors

Janulevičius

Gurevičius

2019

Transport

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The transmission of mechanical front-wheel drive tractors normally has a front axle lead ratio, which is equal to 1.5…2.5%. Naturally, when ballast masses are added to the tractor or when inflation pressure in the tires is reduced, distortion of the tires is inevitable, which changes the lead of the front wheels. In this paper, we present the impact of tire inflation pressures on the lead front drive wheels and movement resistance force when the tractor travelled with a front drive axle enabled and was engine braking with the fuel supply off. It was found that the variation in front and rear tires inflation pressure combination can significantly change the lead of the front drive wheels. For the tested tractor up to 6.9%. The result is that when the tractor travelled with the front axle enabled and was engine braking, the engine-braking efficiency decreases with increasing lead of the front wheels. Front (slipping) wheels create the opposite-direction torque, which is transferred to the rear wheels through the tractor’s front-rear axle drive system. Additional losses of the engine braking occur in transmission due to power circulation, and the result is that the tractor wheels receive less braking torque from the engine.

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“…The efficiency of this approach is low and the accuracy is poor. With the rapid development of science and technology, GPS measurement has become a convenient approach and is widely used in agricultural machinery navigation, positioning and operational area measurements (Langer et al, 2015;Shahgholi & Abuali, 2015). In the measurement of a field area, GPS has become an important measurement tool that has completely changed the traditional approach to operations, reduced labor, and improved production efficiency (Mehta & Tewari, 2015;Lee et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Measurement and Analysis of a Field Area Based on an Adaptive Kalman Filter

Fang

Wang

Zhong³

2017

Eng. Agríc.

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This paper proposed the use of an adaptive Kalman filter (AFK) to improve Global Positioning System (GPS) positioning accuracy to measure a tractor operational area. First, we used MATLAB to identify the operation trajectory. Then, we used different colors to show the area of operation. Finally, we used an image-processing method to calculate the effective operational area, actual operational area, and repeat and omission rates. We used these rates to evaluate the tractor efficiency. The experiment indicated that the Kalman filter improved the accuracy of GPS single-point positioning. To test the GPS area-measurement precision, field area measurements were taken. We used GPS to measure standard figures and some irregular figures. The results indicate that the area measurement relative error was 2.09%. The measurement accuracy increased with the increasing measurement area. The field test results indicated that the most efficient farming method was alternative tillage and the second most efficient was spindle tillage. The omission rate under back tillage was highest and its operational efficiency was lowest.

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Measuring soil compaction and soil behavior under the tractor tire using strain transducer

Cited by 26 publications

References 9 publications

Design of horizontal shear strain instrument for co-estimation of soil stress-strain

Design of horizontal shear strain instrument for co-estimation of soil stress-strain

Impact of the Inflation Pressure of the Tires on Lead of Front Drive Wheels and Movement Resistance Force of Tractors

Measurement and Analysis of a Field Area Based on an Adaptive Kalman Filter

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