Design of and Experiment on Reciprocating Inter-Row Weeding Machine for Strip-Seeded Rice

Wang, Yu; Xi, Xiaobo; Chen, Meng; Shi, Yangjie; Yifu, Zhang; Zhang, Baofeng; Qu, Jiwei; Zhang, Ruihong

doi:10.3390/agriculture12111956

Cited by 6 publications

(8 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on information derived from references [38,39], when rice seedlings are mechanically transplanted, the standard row spacing is 300 mm, with a plant spacing of 150 mm, and the paddy fields are typically submerged in water to a depth ranging from 30 to 50 mm. Following the transplantation of rice seedlings, it is crucial to ensure that they are uniformly distributed, arranged neatly, and aligned in straight rows.…”

Section: Rice Planting and Weed Control Agricultural Requirements In ...mentioning

confidence: 99%

A Combined Paddy Field Inter-Row Weeding Wheel Based on Display Dynamics Simulation Increasing Weed Mortality

Wang,

Liu,

Yang

et al. 2024

Agriculture

View full text Add to dashboard Cite

Weeds compete with rice for sunlight and nutrients and are prone to harboring pathogens, leading to reduced rice yields. Addressing the issues of low weeding efficiency and weed mortality rates in existing inter-row weeding devices, the study proposes the design of a combination paddy field inter-row weeding wheel. The device’s operation process is theoretically analyzed based on the weed control requirements in the northeastern region of China, leading to the determination of specific structural parameters. This research conducted experiments on the mechanical properties of weed cutting to obtain geometric parameters for paddy field weeds. It was found that the range for the cutting gap of the dynamic–fixed blade is between 0.6 mm to 1.4 mm and the cutting angle is between 5° to 15°, resulting in the lowest peak cutting force for weeds. Using LS-DYNA R12.0.0 dynamic simulation software, a fluid–structure interaction (FSI) model of the weeding wheel–water–soil system was established. By employing the central composite experimental design principle and considering the soil stir rate and coupling stress as indicators, the optimal structural parameter combination for the device is obtained: a dynamic–fixed blade cutting gap of 1.4 mm, a cutting angle of 10.95°, and a dynamic blade install angle of −3.44°. Field experiments demonstrated that the device achieved an average weeding rate of 89.7% and an average seedling damage rate of 1.9%, indicating excellent performance. This study contributes to improving weed mortality rates and provides valuable guidance for inter-row mechanical weeding technology.

show abstract

Section: Rice Planting and Weed Control Agricultural Requirements In ...mentioning

confidence: 99%

A Combined Paddy Field Inter-Row Weeding Wheel Based on Display Dynamics Simulation Increasing Weed Mortality

Wang,

Liu,

Yang

et al. 2024

Agriculture

View full text Add to dashboard Cite

show abstract

“…For this simulation, four values of 9.7 Hz, 12.7 Hz, 15.7 Hz, and 18.7 Hz were selected and compared with the optimal excitation frequency of 12.7 Hz. The simulation time was set to 5 s, with 1000 steps to ensure higher accuracy [43][44][45][46].…”

Section: Rigid-flexible Coupling Model Analysismentioning

confidence: 99%

Analysis and Optimized Design of Rigid–Flexible Coupling Characteristics of Crab Apple Picking Machines and Crab Apple Trees

Zhao,

Su,

Zhang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

In recent years, with the gradual expansion of the planting area for Chinese crab apple trees, the traditional method of picking crab apples has become inadequate due to its large workload, low efficiency, and high cost. To address this issue, this paper presents the design of a trunk-type vibration picker specifically for crab apple picking. The design process began with a modal analysis and a harmonic response analysis of a crab apple tree using Ansys Workbench. Through these analyses, the optimal excitation frequency for the crab apple tree was determined to be 12.7 Hz. Subsequently, the picker was designed, and its key components underwent modal and stress analyses. A comparison revealed no resonance between the picker and the key components, ensuring the feasibility of the picker. To further evaluate the performance of the picker, a rigid–flexible coupling analysis was conducted using Adams. This analysis determined the acceleration response curves of the lateral branch points of the crab apple tree at various excitation frequencies: 9.7 Hz, 12.7 Hz, 15.7 Hz, and 18.7 Hz. Finally, field trials were carried out to validate the reliability of the data obtained from Adams. The results showed that the lateral branch point acceleration increased with higher excitation frequencies. However, when the optimal excitation frequency of 12.7 Hz was reached, the lateral branch point acceleration decreased. This indicated that the most effective vibration frequency for picking crab apples was 12.7 Hz.

show abstract

“…Sometimes, row crops in inter-row zones are cultivated with units with a frontmounted cultivator [24,25]. But, like many rear-row tillers, they have relatively small operating widths and are often used at relatively low operating speeds [26,27].…”

Section: Introductionmentioning

confidence: 99%

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Findura,

Nadykto,

Kyurchev

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Due to the negative impact of chemical inter-row weed control on the environment, mechanical weed control is increasingly used in practice. Machine-tractor units (MTU) are used with the row cultivator’s rear and frontal central position for its implementation. We have designed a unit in which side cultivators are used along with the central one. This paper considers the transverse movement kinematics of such an MTU’s outside right and left cultivators’ working devices in the horizontal plane. The present emulation of side machines is made by changing the longitudinal coordinate of their location relative to the tractor’s front and rear axles. Calculations have established that the frontal cultivator responds more intensively to the control action by changing the turning angle of the tractor’s steering wheels. However, if the value of this parameter is less than 2.75°, a rear-mounted cultivator is preferred, because in this case, the values of lateral deviations for the external, left, and right working device are smaller. When the turning angle of tractor wheels is from 1° to 3° (typical for MTU row work), a threefold increase in the working width of the cultivator causes a slight antiphase deviation in its external working devices (an increase or decrease in the amplitude of these deviations does not exceed 4%). The model that we have developed allows us to select the values of the MTU design parameters for which the lateral displacement will be very small (close to zero). As the turning angle of the tractor wheels increases to 3°, the external left and right working devices of the cultivators react inversely. This means that in the case of the rear machine, the values of lateral displacements increase, while in the case of the front machine, they decrease. At a turning angle of the tires of the tractor wheels close to 2.5°, the lateral displacements for the rear and front machines are the same.

show abstract

Design of and Experiment on Reciprocating Inter-Row Weeding Machine for Strip-Seeded Rice

Cited by 6 publications

References 10 publications

A Combined Paddy Field Inter-Row Weeding Wheel Based on Display Dynamics Simulation Increasing Weed Mortality

A Combined Paddy Field Inter-Row Weeding Wheel Based on Display Dynamics Simulation Increasing Weed Mortality

Analysis and Optimized Design of Rigid–Flexible Coupling Characteristics of Crab Apple Picking Machines and Crab Apple Trees

Transverse Movement Kinetics of a Unit for Inter-Row Crops—Case Study: Cultivator Unit

Contact Info

Product

Resources

About