Caught-in injury protection system for wood chippers.
Ammons-DE; Powers-JR; Newbraugh-BH
NOIRS 2003-Abstracts of the National Occupational Injury Research Symposium 2003, October 28-30, Pittsburgh, Pennsylvania. Pittsburgh, PA: National Institute for Occupational Safety and Health, 2003 Oct; :82
Data from the Census of Fatal Occupational Injuries from 1992 1997 show that there have been 920 deaths due to a worker being caught in running machinery. The data also shows that 225 of these occurred while the workers were servicing, loading, or clearing material from the machine. To address the need for improved worker safety and decrease the likelihood of being caught in running machinery, the Division of Safety Research, National Institute for Occupational Safety and Health, integrated a proximity warning and shutoff circuit into a simulated wood chipper. The project began as a radio frequency based intervention for caught-in injuries and evolved into a capacitive proximity sensor that provides warning and shutoff signals when the worker enters the chipper's feed chute. The capacitive proximity sensor consists of two subsystems. The first subsystem consists of sensing electrodes integrated into the feed chute of the chipper. The second subsystem is a programmable control circuit used to detect warning and shutoff levels and activate the corresponding alarms and shutoff mechanisms respectively. The capacitive proximity sensor has undergone laboratory testing in a simulated feed chute. Field testing of the sensor is scheduled to begin in 2004. The overall design of the safety system as well as the results of the lab testing will be discussed.
Injury-prevention; Injuries; Occupational-hazards; Mortality-rates; Safety-measures; Forestry-workers; Forestry; Traumatic-injuries; Accident-prevention
Abstract; Conference/Symposia Proceedings
Research Tools and Approaches: Control Technology and Personal Protective Equipment
NOIRS 2003-Abstracts of the National Occupational Injury Research Symposium 2003, October 28-30, Pittsburgh, Pennsylvania