scholarly journals Recognition of Operating States of a Medium-Sized Mobile Machine

2013 ◽  
Author(s):  
Tomi Krogerus ◽  
Mika Hyvönen ◽  
K Raivio ◽  
Kalevi Huhtala
Keyword(s):  
Mobile Machine

RATIONALIZATION OF THE UNIT FOR DIAGNOSING THE FLOW RATE OF HYDRAULIC EQUIPMENT FOR MOBILE MACHINES

2020 ◽  
Author(s):  
A.N. Sirotenko ◽  
◽  
S.A. Partko
Keyword(s):  
Flow Rate ◽  
Strength Analysis ◽  
Sensor Design ◽  
Flow Meter ◽  
Threaded Connection ◽  
Hydraulic Equipment ◽  
Mobile Machine

The article presents a strength analysis of the flowmeter design used in the diagnostics nodes of mobile machine hydraulic units. The connection of the flow meter housing with the bracket has been simplified and adapted for a more robust sensor design, taking into account the strength and tightness of the threaded connection. The tightness of the applied sealing method is confirmed by the analysis of the stressstrain state of the connection parts and confirmed practically.

scholarly journals A Progressively Advancing Curriculum for Robotics Education – The Case of Toin University of Yokohama –

2006 ◽  
Vol 18 (2) ◽  
pp. 215-221
Author(s):  
Yasuo Hayashibara ◽  
◽  
Takeshi Agui ◽  
Takahiro Ito ◽  
Motoyoshi Ohaba ◽  
...  
Keyword(s):  
Practical Experience ◽  
First Year ◽  
Trial And Error ◽  
First Year Students ◽  
Robotics Education ◽  
Hands On ◽  
Elective Course ◽  
Second Year ◽  
Real World Problems ◽  
Mobile Machine

We detail an educational program implemented at Toin University of Yokohama in which lab and workshop courses on automated mechanics, from basics to applications, are offered consecutively during the first three undergraduate years. Engineering is a discipline concerned with practical real-world problems, but students rarely have the chance to gain enough practical experience to effectively understanding engineering. At our department, first- to third-year students may take several hands-on courses for fabricating machines – first-year students build an automatic mobile machine, second-year students write computer programs to control the position of a robot, and some third-year students design and fabricate an entire robot from the bottom up. An elective course on robot fabrication enables students to choose individual theme. Students experience failures and discover better ways by trial and error through these processes.

Wireless Starting System and Emergency Stop for Teleoperated Hydraulic Mobile Machine

2004 ◽  
Author(s):  
Jarno R. A. Uusisalo ◽  
Albert Raneda ◽  
Jani M. Vilenius ◽  
Kalevi J. Huhtala
Keyword(s):  
Control System ◽  
Wireless Local Area Network ◽  
Data Transfer ◽  
Local Area Network ◽  
Diagnostic System ◽  
Cost Effective ◽  
Area Network ◽  
Safe Place ◽  
Emergency Stop ◽  
Mobile Machine

A small general-purpose teleoperated hydraulic mobile machine is studied at the Institute of Hydraulics and Automation at the Tampere University of Technology. Thanks to teleoperation, the operator of the machine is able to be in safe place during the driving when necessary. However, the actions of the machine can be dangerous for the people or the objects in the environment if problems appear for instance in the control system. On that account, safety issues must be considered carefully. Special attention has to be paid to stop the machine and start the engine again once the machine has recovered from an error situation. The goal of this paper is to describe the design and implementation of different kind of solutions to start and stop the machine wirelessly. The emergency stop can be activated through the wireless connection by the operator or by the automatic diagnostic system of the hydraulic mobile machine. The control system monitors the state of several hydraulic components such as hydraulic valves and motors by means of sensors during the operations of machine. The machine is teleoperated by using WLAN (Wireless Local Area Network) connection. The developed wireless starting system and emergency stop is totally independent of the WLAN link. In the first prototype of the wireless starting system and emergency stop, the wireless connection is carried out by using commercial, cost effective RF (Radio Frequency) modules. The data transfer protocol which is used by the modules is designed for this application. Protocol implementation is carried out with microcontrollers. Another version of the wireless starting system and emergency stop is carried out by using radio modems. The modems have better properties than the cost effective RF modules used in the first prototype due to their higher RF output power. Programmatically carried out automatic emergency stop, which stops the machine, if the WLAN connection between the control station and the machine breaks, is discussed. In that case, the independent wireless emergency stop connection is not needed. Implementations of the system are introduced in this paper. Also, some testing results and user experiences are described. Properties of these different implementations are compared: cost of the system, range, reliability and complexity of the implementation. By means of the studied results the most suitable solution to start the engine and stop the actions of the machine is chosen.

Between Two Line Follower Stand Before the Barrier Mobile Robot-Design and Implementation

2017 ◽  
Vol 5 (2) ◽  
pp. 433
Author(s):  
Abdülkadir Çakir ◽  
Amal Ali Sreawi
Keyword(s):  
Mobile Robot ◽  
Human Life ◽  
People With Disabilities ◽  
Robot Design ◽  
Human Intervention ◽  
Design And Implementation ◽  
Black Surface ◽  
Mobile Machine

A Between two line follower stand before the barrier mobile robot is a mobile machine that can detect and follow between two line drawn on the floor. Generally, the path can be white lines on a black surface or it can be black lines on a white surface. Today robot is very important in our life because it can do everything without human intervention, especially for difficult or danger works. Therefore in this research we will going to design robot that able to walk between two lines, and at the same time, this robot can pass the barriers that facing it. We conclude from this that this robot can help in many areas, such as to be a helper in hazardous work or in the transport of materials that are dangerous to human life, Or that this robot be helpful for people with disabilities where carts industry able to navigate seamlessly, also can use this robot in military actions.

Effect of the Immersion Level of a Virtual Loader Simulator on the Sense of Presence

2011 ◽  
Author(s):  
Jukka Kuusisto ◽  
Asko Ellman ◽  
Taina Kaapu ◽  
Tarja Tiainen
Keyword(s):  
Stereoscopic Display ◽  
User Performance ◽  
Motion Platform ◽  
Sense Of Presence ◽  
University Of Technology ◽  
Machine Industry ◽  
One Simulator ◽  
And Training ◽  
Large Work ◽  
Mobile Machine

In mobile machine industry, work machine simulators can be used to save time and costs in product development and training. However, investing into expensive or difficult-to-use technology should be avoided if it does not affect measurable user performance or feeling of presence. At Tampere University of Technology, a virtual loader simulator has been constructed in an three-wall walk-in virtual environment. The goal of this research was to investigate how the immersivity of the simulator affects testers’ feeling of presence. A total of 25 test users performed two test runs each with different simulator setups, and the presence level of each user was evaluated by a questionnaire after both runs. The results indicate that switching from 2D view to 3D stereoscopic display did not significantly affect the sense of presence. However, with the motion platform, the test users reported clearly higher presence ratings than without it. In addition, we examined some effects of the users’ backgrounds: Test users who had experience from driving large work machines reported lower presence ratings than those without such experience. The sense of presence for frequent computer players was higher than for non-players, but only in one simulator setup.

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