The Computer-Controlled 6-Axis Force/Torque Sensor Calibration & Verification Test Bench is a high-precision calibration platform specifically developed for the calibration, verification, and performance evaluation of six-axis force/torque (F/T) sensors.

Designed in accordance with GB/T 43199-2023, the system utilizes servo-electric loading technology to generate highly accurate forces and moments across all six axes. It supports both single-axis calibration and multi-axis combined loading, enabling comprehensive characterization of sensor performance under real-world operating conditions.

The platform automatically performs step loading, load holding, unloading, data acquisition, and report generation, significantly improving calibration efficiency and measurement consistency.

Widely used in humanoid robotics, industrial robots, collaborative robots, aerospace systems, precision automation, research institutes, and metrology laboratories, this system provides reliable traceability and validation for force/torque sensing applications.

Key Features & Advantages

Full 6-Axis Calibration Capability

The system calibrates all six measurement channels of a force/torque sensor:

• Fx (X-axis force)

• Fy (Y-axis force)

• Fz (Z-axis force)

• Mx (X-axis torque)

• My (Y-axis torque)

• Mz (Z-axis torque)

This enables complete sensor characterization from a single testing platform.

Supports Single-Axis and Combined Loading

Unlike traditional calibration equipment that applies loads in only one direction, the system supports:

• Single-axis calibration

• Dual-axis combined loading

• Multi-axis coupled loading

• Cross-axis interference verification

This better reflects actual robot operating conditions.

High-Precision Servo Loading

The servo-controlled loading mechanism provides:

• Stable force output

• Precise load control

• Excellent repeatability

• Dynamic and static calibration capability

Load holding accuracy can reach up to 3/100000, making it suitable for high-end sensor verification requirements.

Fully Automated Calibration Process

The software automatically executes:

• Step-by-step loading

• Automatic load holding

• Automatic unloading

• Data recording

• Calibration calculations

• Test report generation

This reduces operator influence and improves calibration consistency.

Standards-Compliant Design

The platform is designed based on:

• GB/T 43199-2023

Supporting standardized calibration procedures and traceable measurement verification.

Technical Specifications

Core Test Functions

Force Calibration Test

Applies known forces to verify sensor output accuracy.

Testing Logic:

The system applies precise reference loads and compares measured output against standard values.

Purpose:

Establish sensor calibration coefficients and verify measurement accuracy.

Torque Calibration Test

Applies calibrated moments around each rotational axis.

Testing Logic:

Known torques are generated and compared with sensor feedback signals.

Purpose:

Validate torque measurement performance across all rotational axes.

Multi-Axis Coupling Verification

Simultaneously applies forces and torques on multiple axes.

Testing Logic:

Real robotic applications rarely experience pure single-axis loading. Combined loading verifies sensor behavior under complex conditions.

Purpose:

Evaluate cross-axis coupling effects and measurement robustness.

Load Holding Stability Test

Maintains a constant force or torque over a specified duration.

Testing Logic:

Sensor output is continuously monitored while the applied load remains unchanged.

Purpose:

Assess measurement stability, drift characteristics, and long-term performance.

Repeatability Verification

Repeated loading and unloading cycles are performed automatically.

Testing Logic:

The same load profile is applied multiple times to evaluate output consistency.

Purpose:

Determine repeatability and measurement reliability.

Typical Applications

Humanoid Robots

• Wrist force sensor calibration

• Foot force sensor verification

• Whole-body force sensing validation

• Balance and contact force development

Industrial Robots

• End-effector force control calibration

• Assembly force monitoring validation

• Collaborative robot safety verification

Aerospace & Defense

• Precision force measurement calibration

• Structural testing instrumentation verification

Universities & Research Institutes

• Robotics research

• Force control algorithm development

• Sensor performance studies

Sensor Manufacturers

• Factory calibration

• Product verification

• Quality assurance testing

• Certification support

Why Multi-Axis Calibration Matters

Many force/torque sensors are calibrated using only single-axis loading. However, real-world robotic applications often involve simultaneous forces and moments acting on multiple axes.

For example:

• Robot grasping

• Human-robot interaction

• Walking and balance control

• Precision assembly

• Force-controlled manipulation

Multi-axis calibration provides a more realistic evaluation of sensor behavior and significantly improves measurement confidence in actual deployment.

FAQ

1. What is the purpose of a six-axis force/torque sensor calibration system?

The system establishes the relationship between applied reference loads and sensor outputs, ensuring accurate force and torque measurements across all six axes.

2. Why is multi-axis loading important?

In real robotic applications, forces and torques rarely occur independently. Multi-axis loading evaluates sensor performance under realistic combined-load conditions and helps identify cross-axis coupling effects.

3. What is cross-axis interference testing?

Cross-axis interference testing measures how a load applied on one axis affects readings on other axes. This is critical for high-precision robotic force control applications.

4. Which industries commonly use six-axis force sensors?

Typical applications include:

• Humanoid robots

• Collaborative robots

• Industrial automation

• Aerospace testing

• Medical robotics

• Precision assembly systems

• Research laboratories

5. How does automatic calibration improve accuracy?

Automated loading, holding, and unloading eliminate operator-induced variations, ensuring repeatable test conditions and more reliable calibration results.

6. Can the system generate calibration reports automatically?

Yes. The software automatically records all calibration data, performs calculations, and generates professional calibration reports that can be exported for quality documentation, certification records, and traceability purposes.

7. Why is calibration critical for humanoid robots?

Humanoid robots rely heavily on force feedback for balance control, object manipulation, walking stability, and human interaction. Accurate calibration ensures the robot can correctly interpret external forces and execute precise control actions.