New Assessment Technique for LHD Vehicle Visibility
CIM Edmonton 2004
Indranil Bhattacherya, Matthew Haywood, Tammy Eger,
Over the last three decades, the number of LHD vehicles used in underground mines of Ontario has increased with the industry moving towards more mechanized mining methods. The growing level of mechanization and technology has benefited both workers and companies in Ontario. However, the design of the LHD vehicle and operating conditions contribute to restricted visibility from the operator’s position. The inability of the equipment operator to see clearly (i.e. people, objects or hazards) around the machine has contributed to a number of accidents including fatal injuries.
In order to identify vehicle design characteristics resulting in restricted and blocked sightlines, visibility assessments are traditionally completed in the field using a light filament technique. Past researchers have used the light filament technique to collect obscuration zones around the equipment and to produce a 2D chart of this information. The 2D shadow diagrams have been useful in highlighting potential equipment problems and have been performed repeatedly to show the result of redesigning a piece of equipment. The light filament method involves manually collecting data and requires a level of judgement to be used. As a result the method is susceptible to include errors and requires around three hours to complete. Repeat tests have been performed with the light filament method which has enabled a quantification of the typical errors obtained. The objective of the current research is twofold; firstly to develop a rapid method for field visibility data collection using a laser scanner and secondly to compare results of repeat tests for both light filament and laser scanning methods. A MENSI GS100 laser scanner along with Pointscape and 3Dipsos software has been used to collect visibility information and process the data. Results of this research indicate that a laser scanner can be successfully used to rapidly evaluate the visibility profile of an LHD vehicle. Machine design can then be assessed using these results.
Equipment, Virtual Reality, mobile, Visibility, Laser Scanning