TPL is an add-on module to a central control system. It measures transverse road profiles and calculates the rut/depression depth (mm).
It can be operated in conjunction with other modules to collect a wide variety of condition and asset data simultaneously.
This vehicle mounted unit can operate from 0 - 120 km/h. This makes it extremely practical for large scale surveys as it requires no traffic management.
Utilising a highspeed device like the TPL can significantly increase productivity. Unlike manual site measurements, the TPL can be deployed to survey 100% of a network which leads to more reliable analysis and decision making.
The TPL is equipped with precision laser sensors to give you transverse profile. 9- point laser sensor and a full 15-point laser sensors.
The laser sensors are positioned to offer the height accuracy of laser based equipment and also maintains much of its robustness and cost-effective price. The TPL is available in two options with 15-point laser sensors and with 9-point laser sensors, with the 15-point laser TPL providing higher accuracy transverse profile. If requested, the number of sensors can be customized to suit the specifications of a project or available budget.
Applications
• Small and large scale network surveys
• Post-construction quality surveys
• Routine condition surveying for maintenance planning
Special Features:
• Collect transverse profiles and automatically calculate wheel path rutting over a whole network
• No need for expensive traffic management when surveying at traffic speeds
• 15-point or 9-point laser option available
• Expand with additional modules to collect other pavement or asset data in a single run, e.g. Laser Profilers for roughness (IRI) and macro-texture
• Proven in tough conditions
• Easily serviceable
• No expensive annual factory calibration required
Installation & Maintenance
The TPL does not require a specialized vehicle and can be installed on most locally available vehicles with only minor fabrication.
Once installed the main TPL unit is easily removed for secure storage.
The TPL does not need to be shipped to DCL for annual calibration. Instead a simple onsite calibration is performed to ensure the accuracy and reliability of data.
Components
• TPL unit
• Power and communication cables
• Reference straight-edge
• Mounting beams
Operational Principle
The TPL is user friendly and requires little to no input during surveys.
The user defines an interval to collect transverse profiles (e.g. 1 profile per metre).
These raw profiles are then analysed to calculate rut depths using a simulated 2 m straight edge method.
Specifications
Applicable standards: ASTM E1703
Sensor type: Laser
Number of sensors (contact points): 15 or 9 (custom configurations available on request)
Sensor Spacing: 250
Sensor resolution: 0.05 mm
Mounting height: 300 mm
Range: +/-250 mm
File Format: Generic MS Access databases (.mdb)
Environmental: IP67
Weight: 25 kg
Profile width: 3.5 m
Unit width: 2.2 m