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Characterizing Rigging Crew Proximity to Hazards on Cable Logging Operations Using GNSS-RF: Effect of GNSS
1Forest Operations Research Lab, College of Natural Resources, University of Idaho, 875 Perimeter Drive, Moscow, ID 83844-1133, USA; robk@uidaho.edu.
Forests
|April 13, 2019
Summary
Logging remains a dangerous job. This study quantifies worker-hazard proximity using Global Navigation Satellite System-Radio Frequency (GNSS-RF) transponders, finding canopy interference impacts real-time safety monitoring.
Area of Science:
- Occupational Safety and Health
- Forestry Engineering
- Geospatial Analysis
Background:
- Logging is a high-fatality occupation with known hazards.
- Quantifying worker-hazard proximity is crucial for improving safety protocols.
- Existing safety education emphasizes safe distances but lacks precise positional data.
Purpose of the Study:
- To quantify the spatial relationships between logging crew workers and common cable logging hazards.
- To assess the impact of positioning error on real-time geofence safety applications in logging operations.
- To evaluate how different forest stand conditions affect the accuracy of Global Navigation Satellite System (GNSS) data.
Main Methods:
- Utilized GNSS-RF transponders for real-time monitoring of rigging crew workers and logging hazards (log loader, skyline carriage, snag).
- Collected positioning data across three active logging operations.
- Simulated GNSS positioning errors based on stand conditions (mature stands vs. clearcuts) and applied them to operational data to assess impact on safety status.
Main Results:
- Root mean squared error for GNSS positioning was 11.08 m in mature stands and 3.37 m in clearcuts.
- Simulated positioning errors in mature stands altered the perceived worker safety status in six out of nine scenarios.
- Positioning errors in clearcuts affected safety status in only one scenario, highlighting the impact of canopy cover.
Conclusions:
- Canopy-associated GNSS error significantly affects the reliability of real-time geofence safety applications.
- Single-constellation American Global Positioning System transponders are particularly susceptible to error in mature forest stands.
- Accurate worker positioning is essential for effective real-time safety monitoring in hazardous logging environments.
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