Research Square (Research Square), Год журнала: 2024, Номер unknown
Опубликована: Сен. 16, 2024
Язык: Английский
Research Square (Research Square), Год журнала: 2024, Номер unknown
Опубликована: Сен. 16, 2024
Язык: Английский
Agriculture, Год журнала: 2025, Номер 15(11), С. 1200 - 1200
Опубликована: Май 31, 2025
Chili pepper (Capsicum annuum L.), a globally important economic crop, faces production challenges characterized by high labor intensity, cost, and inefficiency. Intelligent technologies offer key opportunities for sector transformation. This review begins outlining the diversity of major chili cultivars, differences in quality indicators, resulting specific harvesting needs. It then reviews recent progress intelligent perception, recognition, automation within industry. For perception covers evolution from traditional image processing to deep learning-based methods (e.g., YOLO Mask R-CNN achieving mAP > 90% studies) detection, segmentation, fine-grained cultivar identification, analyzing performance optimization complex environments. In terms automation, we systematically discuss principles feasibility different mechanized machines, consider potential vision-based keypoint detection point localization picking, explore motion planning control robots robotic systems incorporating diverse end-effectors like soft grippers or cutting mechanisms algorithms such as RRT) well seed cleaning/separation techniques simulations CFD DEM) equipment optimization. The main current research are listed including environmental adaptability/robustness, efficiency/real-time performance, multi-cultivar adaptability/flexibility, system integration, cost-effectiveness. Finally, future directions given multimodal sensor fusion, lightweight models, edge computing applications) hope guiding growth
Язык: Английский
Процитировано
0Agriculture, Год журнала: 2024, Номер 14(6), С. 815 - 815
Опубликована: Май 23, 2024
The complex mechanical system of a rice combine harvester not only has various excitation sources, but also, the vibration transmission path between each working device and contribution characteristics to frame are clear, so it is difficult perform reduction design for sharp frame. Therefore, based on comparison improvement multiple classical transfer analysis methods, this paper analyzed by discrete time matrix method operating method. In Experimental section, through characteristic experiment firstly, obtained power spectrum variation most needed optimized in under condition. Secondly, simulation exciting force, we damping areas that needs be optimized. Finally, optimization connected with experiment, force was performed. results displayed maximum change value acceleration cutting table decreased from 7.862 m·s−2 3.522 m·s−2, decreasing 55.2%, peak amplitude multipoint test cab 5.4, 5.3, 1.7 2.0 μm, respectively, which significantly reduced, effect significant. This study provides theoretical support
Язык: Английский
Процитировано
2Agriculture, Год журнала: 2024, Номер 14(8), С. 1433 - 1433
Опубликована: Авг. 22, 2024
Strong impacts and vibrations exist in various structures of rice combine harvesters harvesting, so the bolt connection structure on is prone to loosening failure, which would further affect service life working efficiency device structure. In this paper, based vibration signal acquisition experiment vibrating screen harvester, failure feature identification studied. According sensitivity analysis results primary extraction time-frequency feature, most features have limitations bolts. Therefore, establishment a high-dimensional matrix multivariate fusion matrix, validity set was verified whale optimization algorithm. And then, SVM method mapping kernel functions, trained by LIBSVM classification decision model. The identify success rates time domain A, frequency B, WOA-VMD energy entropy C, normalized G are 64.44%, 74.44%, 81.11%, more than 90%, respectively, can reflect applicability state matrix. This paper provided theoretical basis for harvester feature.
Язык: Английский
Процитировано
2Biomimetics, Год журнала: 2024, Номер 9(7), С. 427 - 427
Опубликована: Июль 13, 2024
In this study, based on the principles of bionics, we fabricated a bionic non-smooth concave pit structure shoulders friction stir welding tools and detected thermal cycling curve, downforce, torque tool in process. We tested wear loss weight analyzed surface morphology shoulder surfaces after for 200 m. This study found that as distance between pits decreased number increased, maximum torque, temperature process showed decreasing trend. As speed no matter how changed, downforce decreased, while peak cycle increased. The experimental results show significantly reduced. lowest with interval 1.125 mm was only 0.1529 g, which is 27% lower than conventional tool. Our observations amount aluminum swarf gradually declined increasing density uneven pits. chips adhered to mm. Therefore, biomimetic structures have better resistance adhesion resistance.
Язык: Английский
Процитировано
1Agriculture, Год журнала: 2024, Номер 14(11), С. 1960 - 1960
Опубликована: Ноя. 1, 2024
The self-propelled straw pickup baler in agricultural work is responsible for collecting and compressing to facilitate transportation storage, while reducing waste environmental pollution. Like other equipment, the a complex mechanical system. During operation, its excitation characteristics under multi-source stimuli coupling of various components are not yet clear. This paper analyzed mechanics property each component established balance equations. Based on equations, structures were studied. Through experiments signals from multiple devices different operating conditions, vibration obtained. revealed that Z direction particularly evident. experiments, effective Z-direction signal value left front chassis exceeds 7 m·s2, right it increases 1.995 m·s2 7.287 indicating most intense direction. It was also found that, at driver’s cab, values two response points, 11 12, both exceed m·s2. data indicate significant vibrations occur longitudinal vertical directions. Using Signal Analyzer module MATLAB processing, prominent filtered consist combustion harmonics continuous low-frequency compression mechanism. periodic reciprocating motion crank-slider mechanism causes sustained impacts frame, leading changes amplitude chassis. Thus, reduction mechanism’s key overall machine.
Язык: Английский
Процитировано
1Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
0Agriculture, Год журнала: 2024, Номер 14(7), С. 1174 - 1174
Опубликована: Июль 18, 2024
The bolts and connections of each working part a rice combine harvester can suffer from severe instantaneous impacts alternating loads, these strong loads cause fracture fatigue failure the bolt face even loosening, detachment, bolt. main vibration directions most complex parts in under time-variable multiload excitation were obtained through analysis response signals terms time-domain frequency–domain characteristics via experiment. This study revealed that random peak value vibrating screen is 12.5622, which impact collision standard. For screen, local 4-Y direction was load destroying connection (the reached 60.57 m/s2, 96.91 m/s2) energy intensity 4-Z mainly concentrated at 12.42 maximum three 109~115.68 m/s2), so bolted are vulnerable to destruction. Therefore, kinetic model microscopic established centralized mass method explore structures subjected multiple thus providing mathematical for identifying features based on static characteristics.
Язык: Английский
Процитировано
0Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology, Год журнала: 2024, Номер unknown
Опубликована: Авг. 26, 2024
Three-body wear is the primary mechanism in friction pair between groove side and scraper. This study quantitatively investigates effect of textures on three-body under different factor combinations through abrasive experiments. The results indicate that significantly reduce samples. reduction rate sample reaches 41% optimal combination. Width, depth, tilt angle influence loss. Among these factors, width exhibits a negative change loss, while depth show positive effects. Additionally, there are interactive effects loss as well angle. process to was qualitatively analyzed by discrete element method (DEM) simulation. Combined with morphologies, wear-resistant explored. can mitigate severity wear, contact area particles samples, alter movement enhance resistance. Meanwhile, serve guiding modify direction transform sliding motion coal into rolling motion, converting continuous “face-face” intermittent “point-face” “line-face” contacts. provides novel ideas theoretical foundations for designs mining machinery equipment.
Язык: Английский
Процитировано
0Research Square (Research Square), Год журнала: 2024, Номер unknown
Опубликована: Сен. 16, 2024
Язык: Английский
Процитировано
0