Autonomous Navigation in High-Risk Environments Requires Accuracy in Sensing

The transition from experimental R&D to the mass deployment of autonomous platforms is accelerating. Autonomy has expanded beyond the predictable laboratory or controlled environment.

Engineers and innovators are pushing the boundaries of what machines can achieve by deploying autonomous systems in the most unforgiving environments on Earth, from the crushing pressures of the deep sea to the hazardous, unpredictable terrain of remote industrial sites. Add to this the growing demand for autonomous space vehicles and robotics, and the prospects are vast.

For these machines to operate successfully without human intervention, they require more than mere spatial awareness. They need to understand the physical forces acting on them in real time to make split-second safety decisions. They need precision sensing capabilities designed for use in hazardous locations.

Interface provides ruggedized load cells and multi-axis force technologies that are integrated into operational systems to expand autonomous platform applications in extreme environments. As detailed in our latest case study, Autonomous Systems in Harsh Environments Require Exact Force Measurement, autonomy has a wide range of use cases across industries beyond driverless cars.

Autonomous Platforms in Extreme Environments

Where are autonomous platforms in development, testing, and actual use today? Here are examples of these systems that are known to Interface.

Subsea Energy and Infrastructure

• Pipeline Integrity: Swarms of autonomous underwater vehicles (AUVs) continuously monitor deep-sea oil and gas pipelines to detect ruptures or leaks using real-time force and visual data.
• Wellhead Maintenance: Autonomous systems perform dexterous repairs and valve adjustments on subsea equipment where high hydrostatic pressure prevents human diving.

Nuclear Decommissioning and Power

• Radiation Mapping: Ground vehicles equipped with multi-axis sensors autonomously navigate contaminated zones to map alpha, beta, and gamma radiation levels without exposing operators.
• Reactor Inspection: Small-scale robots navigate the interior of nuclear reactors to inspect structural tiles and support systems in high-temperature, high-radiation zones.

 Mining and Subterranean Exploration

• Autonomous Drilling: Large-scale robotic drilling platforms utilize force sensors to optimize bit pressure and wellbore placement in deep-mining operations.
• Search and Rescue (SAR): Legged robots explore unstable, smoke-filled, or collapsed tunnels to locate survivors and map hazardous subterranean terrain following industrial accidents.

 Aerospace and Space Exploration

• Planetary Rovers: Autonomous platforms navigate irregular, low-gravity terrain to collect geological samples and conduct structural testing on extraterrestrial surfaces, as highlighted in our Rover Wheel Torque Monitoring application
• High-Altitude Weather Sensing: Autonomous UAVs measure extreme updrafts and wind speeds near volcanic activity to improve atmospheric forecasting and disaster prevention.

 Industrial Decontamination

• Hazardous Waste Handling: Autonomous mobile manipulators identify, lift, and transport chemical or biological waste in sealed environments, ensuring precise load distribution to prevent spills.
• Refinery Security: Autonomous “robot dogs” patrol hazardous processing plants to monitor gas leaks and structural fatigue in areas with restricted human access.

Discovering Autonomous Platform Challenges and Solutions

Maritime Autonomous Rescue Vehicles

In search-and-rescue operations, autonomous underwater vehicles (AUVs) must navigate extreme hydrostatic pressure while maintaining precise propulsion. The challenge lies in the environment’s unpredictability. Propellers and thrusters encounter varying water resistance and hydrodynamic loads that can lead to mechanical fatigue or catastrophic failure if unmonitored.

To solve this challenge, engineers use the Interface T2 Ultra Precision Shaft-Style Rotary Torque Transducer. This sensor is designed for contactless data transmission, enabling torque measurement during high-speed thruster operation (up to 15,000 RPM) with a combined error of 0.1%. When paired with the SI-USB4 4-Channel USB Interface Module, the system provides a high-resolution, 16-bit data stream directly to the AUV’s control unit. This real-time feedback enables the autonomous system to optimize energy consumption and dynamically adjust thruster output, ensuring mission success in the expansive reaches of the ocean. Read: Water Rescue Robot.

Terrestrial Inspections Require Stability in Hazardous Zones

The oil and gas industry increasingly relies on autonomous quadrupedal “robot dogs” to inspect refineries and offshore platforms. These environments are characterized by uneven steel grating, steep stairs, and slippery surfaces, where a single misstep could result in the loss of expensive equipment or a safety hazard.

Engineers have integrated the Interface LBM Compression Load Button Load Cell into the feet of these robotic explorers. Despite their small footprint, these stainless-steel sensors can manage capacities up to 50,000 lbf, providing vital data on ground contact forces and weight distribution.

Using the WTS-AM-1E Wireless Strain Bridge Transmitter keeps the robot completely untethered. The data is beamed via a WTS-BS-6 Wireless Telemetry Dongle to a remote monitoring station, allowing the robot’s onboard AI to adjust its gait and balance instantly as it transitions from flat concrete to rugged industrial terrain. Learn more in the Autonomous Robot Dog app note.

The Hybrid Shift to Validating Multi-Axis Stress

One of the most complex advancements is the rise of hybrid humanoid robots capable of switching between fully autonomous and remote-controlled modes. These machines must perform high-load mechanical operations, such as turning stubborn underwater valves or operating heavy salvage tools. The stress placed on robotic joints during these transitions is immense and multi-directional.

To manage this complexity, Interface provides the 6A55RI 6-Axis Robot Flange Force-Torque Sensor. Unlike standard sensors that measure a single force, the 6A55RI captures simultaneous data across three force axes and three torque moments. Integrated directly into the robot’s limb flanges, it uses an EtherCAT P interface to transmit power and high-speed data through a single cable. The sensor ensures that the robot’s control system has a comprehensive map of mechanical stress at every joint, preventing over-torque and extending the platform’s operational life. Learn more: Underwater Humanoid Robot.

Engineering a Reliable Autonomous Future

The data provided by Interface hazardous locations load cells, torque transducers, and multi-axis sensors is engineered for the specific demands of extreme environments and autonomous platforms. By integrating these ruggedized technologies, developers are shortening development cycles and increasing the reliability of mission-critical applications.

TIP: learn more in our Hazardous Locations ATEX 101.

Whether it is a subsea drone or a terrestrial inspector, the goal remains the same: providing the physical data necessary for autonomy to thrive, reducing the risk to humans and our world.

Contact the Interface Application Engineers to explore your sensor requirements for autonomous platforms.