Pesticide spray is a widely used chemical control method to minimize biological disasters in the agriculture industry. It important evaluate efficacy and quality of pesticide sprayer, however, it cannot be conveniently achieved due lack accessibility sprayed droplets intensity associated work. This paper proposes novel method, based on an image processing-based approach, assess quality. The proposed uses combination algorithms criteria functions; such as, maximum between-cluster variance...

Early detection of water stress is essential for orchard management; however, existing methods are unable to accurately monitor individual plant status over large areas, and the shaded nature kiwifruit orchards further complicates monitoring root soil moisture content (RSMC). In this study, we used multilayer perceptron (MLP) canopy vegetation indices, estimated by unmanned aerial vehicle remote sensing, predict RSMC at a depth 40 cm during fruit expansion stage in Kiwi (August 2021 2022)....

Purpose Omnidirectional mobile platforms are still plagued by the problem of heading deviation. In four-Mecanum-wheel systems, this arises from phenomena dynamic imbalance and slip Mecanum wheels while driving. The purpose paper is to analyze mechanism omnidirectional motion using wheels, with aim enhancing precision. A proportional-integral-derivative (PID) setting control algorithm based on a radial basis function (RBF) neural network model introduced. Design/methodology/approach study,...

To realize applications involving low speed and high torque in the high-performance actuator industry, especially aerospace field, we propose a novel 70H traveling wave rotary ultrasonic motor (TRUM) with an outer diameter of 70 mm aperture ratio 53% (the between diameter). The power transmission mechanism stator rotor is analyzed, method for realizing low-speed–high-torque characteristics TRUMs proposed. ANSYS software used to simulate modal parameters stator, β normal amplitude tangential...

Extraction and segmentation of kiwifruit vine range is an important part precision agriculture in orchard. In this paper, depth semantic traditional machine learning are used to segment extract vines from orthophoto images, the accuracy image quality based on pspnet, SVM random forest classification another test set compared. Experimental results show that although mean pixel deep slightly lower than segmentation, better pixels more continuous. The method effectively developed UAV remote...

It is important to obtain accurate information about kiwifruit vines monitoring their physiological states and undertake precise orchard operations. However, because are small cling trellises, have branches laying on the ground, numerous challenges exist in acquisition of data for vines. In this paper, a canopy distribution prediction model proposed basis low-altitude unmanned aerial vehicle (UAV) images deep learning techniques. First, location plants vine extracted from high-precision...

The stators of hollow-type traveling wave ultrasonic motors have certain problems stemming from their complex and hollow structures, significant differences between the two orthogonal modal frequencies, incomplete separation design model interferential model, low-vibration amplitude, localized inner stress during vibration, etc. In this paper, a dimensional parameterized finite elemental for motor was established by utilizing method. Afterwards, assurance criteria were used to identify...

Control moment gyro (CMG) that driven by traveling wave hollow ultrasonic motor have the closed loop stability control and multi objective angle fixed locking precision in large speed range demand. In this paper, a mathematical model of system type is established. Then taking into account nonlinear characteristics gyroscope system. A robust strategy designed using fuzzy Takagi-Sugeno theory, then semi experimental platform established according to obtained frame parameters. Finally,...

Abstract In order to realize the establishment of unknown terrain map in indoor environment ROS wheeled mobile robot, this article uses Lidar, Raspberry Pi and other hardware build environment, robot is built by URDF model, model configured. Differential controller, keyboard control node, etc. Establish simulation use different environments visually simulate two optimization algorithms SLAM algorithm construction map. explore effect SLAM’s on graphics, based filter graph are introduced...

Abstract China is a one of the largest countries producing kiwifruit, and there are many kinds kiwifruit in China. The identification varieties has important application value automatic picking robots sorting factories. paper studies classification based on deep learning, deployment model Jetson Nano artificial intelligence development board. A portable device used for was designed developed. This studied selection various parts shell. shell obtained through 3D printer, assembled parts, kiwi...

Appropriate vibration parameters can improve the efficiency of harvesting, so selection harvesting is very important. In this paper, stress olive fruit analyzed, and tree tested simulated. Design-Expert 12.0 used for experimental design, The diameter, height angle main branches were selected as test factors, optimal frequency force evaluation indexes. determines through modal analysis; optimum determined by harmonic response analysis test. quadratic polynomial regression model obtained....

Abstract An apple pluck port based on negative pressure suction force can realize contactless plucking and also reduce possible damage to the apple. Accordingly, in this study, a strength type pneumatic was designed basis of Tesla valve. First, low air block for mechanization valve structure at intersection between main curved passageway theoretically modelled analyzed. Then, flow speed distribution were analyzed three different types parameters under various distances from apple; fluent...

At present, the application of parallel picking robot has been very popular, but there are some problems in actual life that mechanization efficiency is not high enough. In this paper, through analysis structure design existing four-bar Delta laboratory, combined with kinematics robot, forward solution and inverse carried out. With Monte Carlo method as research MATLAB simulation tool, workspace simulated, effective optimized for size driven arm driving respectively, so proportion reaches...

Purpose The purpose of this study is to test a chassis robot on rugged road cargo handling. Design/methodology/approach Attitude solution D-H series gyroscope speed and acceleration sensor. Findings In identical experimental environments, hexapodal robots experience smaller deviations when using four-footed propulsive gait from typical three-footed for forward motion; the same distance but at different speeds, deviation basically keeps itself within range advances with four-foot gait;...

The accurate recognition and location of apple can realize the precise picking apples. Aiming at solving problem Apple rapid positioning, this paper uses algorithm on YOLOv4 target detection model to extract features dataset train deep-learning. Moreover, it combines monocular camera user interface, finally realizes a positioning system based final loss value trained is only 3.872, which shows that performs well in positioning.

At present, the typical tripod gait of a hexapod robot has large deviation from direction motion. In this thesis, characteristics and experimental results are analyzed, causes summarized; Then, kinematics model robot's monopod is established, theoretical equation lateral slip obtained by combining mechanical analysis foot. Finally, essence synthetically analyzing data friction experiment foot pressure experiment. Experiments show that when walks in plane acrylic force plate, both left right...

At present, the forward-flapping gait of a hexapod robot has large deviation from direction motion. This thesis compared and analyzed force acting on foot in quadruped-propulsive gait, mechanism robot's straight-line walking is obtained by theoretical analysis; Then through analysis experiment, lateral obtained. Finally, experiment results show that can solve problem well.

Assessment of pronunciation has long been established as an integral component speaking assessment, usually combined with other dimensions such fluency, lexico-grammatical resources and topic development to generate overall score for the section in major English tests.Few studies have focused on assessment per se, which plays a critical role pedagogical context pre-service teacher training.This study attempts develop diagnostic rating scale purpose instruction practice provide supporting...