Measuring robot performance in autonomous delivery systems: why torque testing matters
Autonomous delivery robots are no longer a futuristic concept. From university campuses in the US to growing trials across the UK, these robots are already being tested in real-world environments where they must navigate complex routes, avoid obstacles, and transport goods safely and efficiently.
Behind every successful autonomous robot is rigorous engineering and testing. For design engineers, one of the key challenges is how to accurately monitor and measure robot performance, particularly when it comes to movement, load handling, and safety. This is where torque measurement and testing play a critical role.
The engineering challenge of autonomous delivery robots
Delivery robots operate in environments that are unpredictable and constantly changing. Typical challenges include:
- Navigating narrow pathways and busy pedestrian areas
- Detecting and avoiding static and moving obstacles
- Travelling over varying terrain such as slopes, kerbs, and uneven surfaces
- Carrying food or packages securely without spillage or damage
Each of these factors places mechanical and electrical demands on the robot’s drive system. Engineers must ensure that motors, gearboxes, and wheels work together efficiently - and safely - under all expected operating conditions.
Why measuring torque is critical in robot design
Torque is a fundamental parameter when designing and validating robotic mobility systems. It directly influences how a robot accelerates, climbs slopes, carries loads, and responds to resistance.
By measuring torque during development and testing, engineers can:
- Validate motor and drivetrain selection for real-world operating loads
- Ensure consistent performance when carrying varying payloads
- Identify inefficiencies or excessive mechanical stress in gearboxes and joints
- Improve safety, particularly when robots interact with people in public spaces
Without accurate torque data, robots may struggle with mobility, experience premature component wear, or pose safety risks during operation.
Monitoring robot performance in real-world testing
During testing, torque measurement allows engineers to compare expected performance with actual behaviour. For example:
- How much torque is required when the robot starts moving from rest?
- How does torque change when navigating inclines or uneven surfaces?
- What happens to torque demand when the robot is fully loaded versus empty?
These insights help engineers refine control algorithms, optimise energy efficiency, and ensure reliable operation over long periods of use.
For autonomous delivery robots operating continuously throughout the day, even small improvements in efficiency or mechanical design can result in significant gains in reliability and battery life.
Video: Food delivery robot
From campus delivery to UK trials
While early deployments of food delivery robots have been seen on university campuses in the US, similar technologies are now gaining momentum in the UK. Trials of autonomous delivery robots - and drones - are underway in selected areas, including towns such as Darlington.
As these systems move closer to widespread adoption, the demand for robust testing and measurement will only increase. Public environments require exceptionally high standards of safety, repeatability, and performance - all of which depend on accurate measurement during the design and validation stages.
Real-world UK trials of autonomous delivery
Across the UK, autonomous delivery technologies are moving beyond pilot stages. Companies such as Evri are trialling wheeled-legged robots to handle “last 100-yard” parcel delivery in Barnsley - tackling kerbs and uneven terrain with AI-driven navigation.
In Greater Manchester, Trafford Council has expanded robot delivery services that navigate pavements using sensor-based mapping and obstacle avoidance.
Retailers including Co-op have deployed Starship robotic grocery deliveries across Yorkshire, with thousands of households now able to schedule autonomous drop-offs via app.
On the aerial side, Amazon has begun test flights from its Darlington fulfilment centre as it prepares for the first UK drone deliveries under its Prime Air service - working with local authorities and the Civil Aviation Authority to bring autonomous drones into public use.
The role of torque sensors in robotics testing
High-quality torque sensors enable engineers to capture precise, repeatable data from motors and drivetrains during both laboratory and field testing. When integrated into a test setup, they provide real-time insight into how a robot responds to load changes, terrain variation, and operational demands.
For robotics engineers, this data supports:
- Faster design iteration
- Improved confidence in system performance
- Reduced risk during deployment in public spaces
Designing safer, more reliable autonomous robots
Autonomous delivery robots must do more than simply move from point A to point B. They must do so safely, efficiently, and consistently, even in challenging environments.
By incorporating torque measurement into the design and testing process, engineers gain the data they need to optimise mobility, protect mechanical components, and ensure safe interaction with the public. As robot delivery trials expand across the UK, this type of performance monitoring will play an essential role in turning promising prototypes into reliable, real-world solutions.
Frequently Asked Questions (FAQ)
Q: Why is torque testing important for delivery robots?
A: Torque testing ensures that a robot’s motors and drivetrains can handle expected loads, navigate varying terrain, and operate safely, which is critical for performance and reliability.
Q: Can these robots carry food safely over uneven surfaces?
A: Yes, torque measurement and mobility testing help engineers fine-tune the robot’s movement to prevent spillage or damage while maintaining stability on different terrains.
Q: Are autonomous delivery robots being tested in the UK?
A: Yes, trials are underway in several areas, including pavement-based robots in towns like Barnsley and Wakefield, as well as drone delivery testing in Darlington.
Q: How does real-world testing differ from lab testing?
A: Real-world testing introduces unpredictable elements such as pedestrians, kerbs, slopes, and surface variations. Torque measurement in these conditions provides data that lab simulations alone cannot fully replicate.
Q: What role do torque sensors play in design optimisation?
A: Torque sensors provide precise, repeatable measurements that help engineers refine control algorithms, reduce mechanical stress, improve efficiency, and enhance safety before public deployment.
Food delivery robot – how to find out more
- Torque and robotics:
- Products:
- Read about our range of torque sensors and torque transducers.
- Contact us:
- Please get in touch to discuss how we can help with your latest robotics project.
About Interface Force Measurement Solutions
Interface Force Measurements Ltd is a UK-based engineering specialist in force, torque, and pressure measurement systems. As the master distributor and technical centre for Interface load cells across the UK, Ireland, the Middle East, and North Africa, we do far more than simply supply products - we design, build, and support complete measurement solutions tailored to customer applications.
Our newly established UK calibration laboratory represents a major investment in UK capability. It enables us to provide comprehensive in-house calibration, testing, and verification services, to our customers. While ensuring every solution we deliver meets the highest international standards. This facility reinforces our commitment to supporting UK industry with precision, reliability, and fast turnaround times.
Working with world-class partners such as Interface, DDM Sensor Solutions, AMTI Force Measurement Systems, GP:50 Pressure Sensors, and XSENSOR Intelligent Dynamic Sensing, we integrate cutting-edge transducers, sensors, and instrumentation into fully engineered systems.
All of our partners share our values of quality, reliability, and customer focus. Whether you need a standard transducer, a custom-designed force measurement system, or complete system calibration and support, Interface Force Measurements provides manufacturer-grade solutions with UK-based technical expertise and service.
