Design and Study on the Automatic Extrusion Device for Curved Chassis of Vibratory Feeder

2012 ◽  
Vol 198-199 ◽  
pp. 1298-1301
Author(s):  
Liang Han ◽  
Jia Li ◽  
Lei Xiang Zhang
Keyword(s):  
Hydraulic System ◽  
Experimental Studies ◽  
Control Unit ◽  
Control Technology ◽  
Proportional Control ◽  
Vibratory Feeder ◽  
Potential Benefits ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Micro Control Unit

Vibratory feeder is a device which is used to arrange small workpieces in neat rows and convey them from one place to another by vibratory feeding. It has been playing a key role in automation production. According to manufacturing equipments for the chassis of vibratory bowl feeder, this paper makes studies mainly in the followings: (1) introduces the principle of the vibratory feeder briefly, (2) the mechanical structure of the automatic extrusion device for curved chassis of vibratory feeder is designed, including frame, moulds and guiding mechanism, (3) static analysis, mould stress analysis are done by using the finite software ANSYS, (4) based on the electro-hydraulic proportional control technology, a hydraulic system is designed, (5) a control system based on STC89C52RC MCU(Micro Control Unit) is given. The problems of automatic extrusion for the curved chassis of vibratory feeder are successfully solved through the theoretical and experimental studies, which achieves the expected design goals and fills in a gap in this field in China, which brings great economic and social potential benefits and has wide application prospect.

Design of Hydraulic System of Sway Machine Based on Electro-Hydraulic Proportional Control Technology

2012 ◽  
Vol 510 ◽  
pp. 34-38
Author(s):  
Yun Li ◽  
Jin Wei Fan ◽  
Xing Li Gao ◽  
Xiao Feng Wang
Keyword(s):  
Hydraulic System ◽  
Production Efficiency ◽  
Control Valve ◽  
Control Technology ◽  
Variable Speed ◽  
Motor Speed ◽  
Hydraulic Motor ◽  
Proportional Control ◽  
Improve Design ◽  
Automatic Adjustment

According to the problems of hydraulic system of sway machine, such as commissioning and maintenance are inconvenient, impact of change direction is big, system speed is slow, production efficiency is low, etc. It used electro-hydraulic proportional control valve to improve design in hydraulic system of sway machine. Application of electro-hydraulic proportional control valve has realized automatic adjustment of the hydraulic motor speed; it is effective to solve variable speed movement of sway machine frame and no impact of changing direction smooth. Commissioning and maintenance of sway machine are more convenient, and it improves performance of sway machine.

Hydraulic System Research of the Pumping Unit Based on Electro-Hydraulic Proportional Control Technology

2013 ◽  
Vol 373-375 ◽  
pp. 1340-1344 ◽  
Author(s):  
Lin Jiang Chang ◽  
Shu Zhong Lin ◽  
Hong Wu Zheng
Keyword(s):  
Mathematical Model ◽  
Hydraulic System ◽  
Control Technology ◽  
Current Signal ◽  
System Research ◽  
Unit Load ◽  
Running Speed ◽  
Proportional Control ◽  
Working Principle ◽  
Pumping Unit

Trapezoidal curve is selected as the hydraulic pumping unit load running speed curve. Designed a new hydraulic system of hydraulic pumping unit according to the electro hydraulic proportional control technology and then expounded its working principle, in which the electro-hydraulic proportional directional throttle valve have been used. The system is feasible on the theory by analyzing its mathematical model. It would meet the requirement of hydraulic pumping unit and realize the advantages of it via controlling the input current signal of the amplifier.

Force Analysis of a Vibratory Bowl Feeder for Automatic Assembly

2004 ◽  
Vol 127 (4) ◽  
pp. 637-645 ◽  
Author(s):  
Richard Silversides ◽  
Jian S Dai ◽  
Lakmal Seneviratne
Keyword(s):  
Angular Displacement ◽  
Geometric Model ◽  
Leaf Spring ◽  
Automatic Assembly ◽  
Force Analysis ◽  
Vibratory Feeder ◽  
The Moment ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Resultant Forces

This paper investigates the vibratory bowl feeder for automatic assembly, presents a geometric model of the feeder, and develops force analysis, leading to dynamical modeling of the vibratory feeder. Based on the leaf-spring modeling of the three legs of the symmetrically arranged bowl of the feeder, and equating the vibratory feeder to a three-legged parallel mechanism, the paper reveals the geometric property of the feeder. The effects of the leaf-spring legs are transformed to forces and moments acting on the base and bowl of the feeder. Resultant forces are obtained based upon the coordinate transformation, and the moment analysis is produced based upon the orthogonality of the orientation matrix. This reveals the characteristics of the feeder, that the resultant force is along the z-axis and the resultant moment is about the z direction and further generates the closed-form motion equation. The analysis presents a dynamic model that integrates the angular displacement of the bowl with the displacement of the leaf-spring legs. Both Newtonian and Lagrangian approaches are used to verify the model, and an industrial case-based simulation is used to demonstrate the results.

Study of a Vibratory Feeder with Repulsive Surface Which Has Directional Characteristic

1980 ◽  
Vol 102 (1) ◽  
pp. 94-101 ◽  
Author(s):  
S. Okabe ◽  
Y. Yokoyama
Keyword(s):  
Experimental Studies ◽  
Directional Characteristic ◽  
Vibratory Feeder ◽  
The Mean ◽  
Theoretical Results

This paper treats the motion of a particle on a vibratory feeder whose track has directional characteristic in repulsive motion, for examples, obliquely bristled track, obliquely sliced track and so on. Under some assumptions, the practical equation for predicting the mean conveying velocity is shown and the relations between conveying condition and the mean conveying velocity are clarified theoretically. These relations are shown in various diagrams. Referring these diagrams, the optimum conveying conditions are discussed also. The theoretical results show that the mean conveying velocity is considerably larger than that of the ordinary feeder. The theoretical results are confirmed by experimental studies.

Design of Human Machine Interface Based on ARM and Linux

2012 ◽  
Vol 241-244 ◽  
pp. 2714-2717
Author(s):  
Kun Zhang ◽  
Xi Wei Peng
Keyword(s):  
Low Cost ◽  
Hardware Design ◽  
Control Unit ◽  
Embedded Linux ◽  
Human Machine Interface ◽  
Device Drivers ◽  
Machine Interface ◽  
Micro Control Unit

In order to provide more convenient options for users and developers, the design of Human Machine Interface (HMI) based on ARM and embedded Linux is put forward. It makes full use of multiple peripherals of ARM and flexibility of Linux OS. Firstly, hardware design of the HMI system is presented. Then methods of embedded Linux transplanting and the device drivers programming are discussed. Finally, running results and applications of the designed HMI are considered. The design combines the features of traditional HMI and Micro Control Unit (MCU) HMI, including low cost, rich interfaces and easy programming.

scholarly journals Simulation of dynamics of hydraulic system with proportional control valve

2016 ◽  
Vol 114 ◽  
pp. 02008 ◽  
Author(s):  
Adam Bureček ◽  
Lumír Hružík ◽  
Martin Vašina
Keyword(s):  
Hydraulic System ◽  
Control Valve ◽  
Proportional Control

scholarly journals Advancing Knowledge on the Health Consequences of Discrimination: The Potential of Virtual Reality

2021 ◽  
Author(s):  
P. Priscilla Lui ◽  
Elizabeth Stringer ◽  
Ernest Jouriles
Keyword(s):  
Virtual Reality ◽  
Indigenous Peoples ◽  
Experimental Studies ◽  
People Of Color ◽  
Science Method ◽  
Comprehensive Understanding ◽  
Causal Pathways ◽  
Innovative Method ◽  
Potential Benefits ◽  
Methodological Approaches

Objectives: Racism and discrimination drive racial and ethnic health disparities, and are robust markers for a host of health outcomes in People of Color and Indigenous Peoples (POCI). A comprehensive understanding of possible causal pathways by which racism and discrimination lead to POCI’s health disadvantages is a critical step toward reducing disparities and promoting health equity. Experimental methods can help researchers delineate these causal pathways. In this manuscript, we illustrate how virtual reality (VR) can be used by researchers in experimental studies to advance discrimination science. Method: We summarize current findings on health effects of discrimination. We describe common methodological approaches that have been employed in discrimination science and discuss some of their limitations. Arguments for the potential benefits of using VR to advance discrimination science are provided. Results: VR has the potential to facilitate ecologically valid experiments that examine individuals’ responses to racism and discrimination-related experiences in real-time. Conclusions: VR offers scientists an innovative method that can be used in experimental studies to help delineate how racism and discrimination might lead to health problems in POCI. Still, VR is new to discrimination science; thus, research is necessary to empirically delineate advantages and possible disadvantages of using VR in studies on discrimination.

Research and Analysis of a Portable Precision Temperature Sensor

2014 ◽  
Vol 945-949 ◽  
pp. 1924-1931
Author(s):  
Hai Qing Yao ◽  
Heng Cao ◽  
Fei Jiang ◽  
Bo Sun
Keyword(s):  
Temperature Sensor ◽  
Low Cost ◽  
Current Source ◽  
Control Unit ◽  
Constant Current ◽  
Interference Signal ◽  
Constant Current Source ◽  
Differential Signal ◽  
Precision Temperature ◽  
Micro Control Unit

Based on the excellent performance of Pt100, a portable low-cost precision temperature sensor has been designed, whose core chips are REF03, AD8603, AD7788 and precision resistors. Constant current source (CCS) for 4-wire Pt100 is constituted by REF03, AD8603 and precision resistors. AD7788 measures the differential signal on Pt100 and suppresses the common mode interference signal. Analysis software running on the micro control unit (MCU) filters the digital code from AD7788, and then calculates the current temperature value according to the resistance-temperature mathematical model of Pt100. Analysis and experimental results show that the temperature measurement accuracy of the sensor can reach ±1°C within the range of 0°C-650°C.

Sign in / Sign up

Export Citation Format

Share Document