Robust Radar-Based Distance Control for Paving Automation
In paving operations, precise distance control between the material transfer vehicle (MTV) and the paver is critical to maintain alignment of the conveyor over the hopper. Misalignment can result in material spillage, uneven hopper filling, and paving defects. An equipment manufacturer sought a robust sensor that could operate reliably in the demanding environment of hot-mix asphalt paving.
Challenge
Due to the challenging environment, finding a suitable distance sensor was difficult. Laser-based distance sensors were tested to manage spacing; however, high temperature and dust caused interference, leading to unreliable readings and system faults. The laser sensors also required regular cleaning and recalibration, increasing maintenance.
Solution
After rigorous testing, ABM’s rugged non-contact radar level sensor was selected and integrated into the MTV’s rear control system. The radar provides continuous distance measurement to the paver, unaffected by heat, dust, or vibration.
Advantages for OEM Integration:
- Environmental Resilience: Immune to heat, dust and condensation
- Maintenance-Free: No manual lens cleaning or compressed air cleaning required
- High Reliability: Stable output on noisy, vibration-heavy and mobile equipment
- Control System Compatibility: Easily interfaces with the machine control system
- Robust Design: Housing with IP68 rating, suitable for outdoor environments and machinery wash down
Results
After replacing the laser-based system with ABM’s radar, improved stability in the paving control logic, reduced system faults, and elimination of conveyor alignment errors were reported. The radar has operated through multiple paving seasons without sensor-related downtime.
Conclusion
For automation and control systems in construction machinery, ABM’s non-contact radar offers a field-proven solution. Its resistance to environmental interference and maintenance-free operation make it well-suited for various spacing, alignment, and distance applications in the construction industry.
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Fast Response Radar Level Sensor R-FR
Radar Sensors
