As humanoid robots move from prototypes to mass production, the position feedback devices inside their joints are facing unprecedented challenges: tighter space, more complex operating conditions, and higher precision requirements. Traditional magnetic encoders are susceptible to electromagnetic interference and carry demagnetization risks at high temperatures; optical encoders are vulnerable to oil, dust, and condensation. Inductive encoders based on the eddy current principle solve these problems at the physical level through non-contact measurement—no wear-prone parts, resistance to vibration and shock, resistance to oil and dust, resistance to magnetic interference, maintenance-free, and stable operation over a wide temperature range of −40°C to +105°C.

▲ From humanoid robots, collaborative robots, and robot dogs to servo systems, full-scenario inductive encoder solutions.

Vicvac Inductive Encoder Product Line—As a dedicated innovator in inductive encoder technology, Vicvac has launched three core product series: single-turn absolute, mechanical gear multi-turn, and same-side dual encoder, fully covering robot joints, servo systems, and other application scenarios.

Product Matrix

Single-Turn Absolute Encoder INC Series

• 360° absolute angle detection, resolution up to 23 bit

• Absolute accuracy ±100 arcseconds, repeat accuracy ±10 arcseconds

• RS485 Tamagawa protocol, supports flying-lead cable solution

• Suitable for humanoid robot, collaborative robot, and robot dog joints

Mechanical Gear Multi-Turn Encoder IMC Series

• Single-turn 17–23 bit, mechanical multi-turn 16 bit, repeat accuracy ±5 arcseconds

• Pure mechanical gear structure memorizes multi-turn position; no data loss after power-off, battery-free maintenance

• Physical storage, completely avoiding the risks of multi-turn data loss and memory corruption

• Ultra-thin design, purpose-built for servo drives

Same-Side Dual Encoder IDC Series

• Same-side, same-plane dual-ring feedback: outer ring 17 bit / inner ring 19 bit

• Repeat accuracy ±10 arcseconds, supports RS485/BiSS protocol

• Extra-large hollow bore: power and signal cables can be routed through the joint interior, making wiring safer

• Ultra-narrow tracks: leave space for the motor and reducer, with pseudo multi-turn function

From shoulders, elbows, and wrists to hips, knees, and ankles, and from dexterous hands to precision turntables, a humanoid robot often needs dozens of encoders. Only by choosing the right technology route can every movement be smooth, precise, and reliable.

Automotive-Grade Quality

As robots move toward large-scale mass production, reliability cannot remain merely laboratory data. Vicvac's confidence comes from automotive-grade standards:

Automotive-grade product reliability validation—products have completed full reliability validation according to automotive-grade standards, including high/low temperature, vibration and shock, EMC, and more, far exceeding general industrial requirements.

Automotive-grade quality management system—from R&D and production to outgoing inspection, automotive-grade quality management is implemented throughout to ensure consistency in mass delivery.

Million-unit project experience—accumulated development and mass-production experience in million-unit automotive-grade inductive projects.

Joint validation with leading customers—Vicvac has carried out collaborative testing and validation with leading customers, and product performance has been fully verified under real operating conditions and in mass-production environments.

The rigorous automotive-grade standards are now fully transferred to every process of inductive encoders—giving the “precision nerves” of robot joints the reliable genes of mass production from day one.

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