Technology

Spatial. Sustainable. Seamless. Simple. Scalable

Gradient Magnetostatic Sensing (GMS™)

TECHNOLOGY PRINCIPLE

Patented technology
AMI (Advanced Magnetic Interaction) the start-up pioneering Augmented Interaction™ thanks to its unique technology protected by more than 130 international patents and based on 60 years of R&D in magnetometry at CEA LETI, a world-renowned institute for micro-nanotechnologies.

Advanced 3D Performances

3D Position accuracy

Up to 0.2 mm
with 0.1mm resolution
Absolute positionning
(no drift)

Range

Up to 20 cm
distance from the sensors

Report rate

Output data rate
up to 600 Hz

3D orientation accuracy

Up to 0.5° with
0.1° resolution

Range on orientation

360°
detection range

Low latency

5 ms
latency

RF, touch & wireless charging interference-proof

AMI's technology cannot be affected by radio frequencies (RFID, NFC, BLE, WIFI, 5G.....).

True 3D Sensing
with 5 Degrees Of Freedom.

While others focus only on X-Y detection, AMI goes further by capturing the full spatial behavior of tools, with 5 degrees of freedom (5DOF):
X, Y, Z, Roll, and Tilt.

Even when a magnet rotates, the generated field remains stable — enabling ultra-precise detection in all orientations.

Passive Magnetic Emitters

ANY SIZE, ANY SHAPE, ANY MATERIAL

Flexibility enables richer interaction behaviors while adapting naturally to various tools and form factors.

Shape	Dimensions	Material	Finish
Ring	Outer diameter from 10 to 25 mm Inner diameter from 6 to 15 mm	NdFeB	Nickel coating
Cylinder	Diameter from 5 to 12 mm	NdFeB or Ferrite	Nickel coating or machined (raw finish)
Disc	Diameter from 6 to 25 mm	NdFeB or Ferrite	Nickel coating or machined (raw finish)
Sphere	Diameters from 6 to 12 mm	NdFeB	Nickel coating

GMS™ Controler Performances

Capabilities	90 sensor @350Hz 2 accessories simultenaously 3 different magnet recognition (up to 6 different accessories)
Interface	USB C, CDC profile, AMI serial protocol
Architecture	1 computing MCU
Feature	Sensor data acquisition Sensor data processing (localisation of magnet, object recognition, stroke detection) External field filtering Customizable by AMI Possibility to merge GMS controler (customization by AMI)

FLEXIBLE RECEIVERS

Surface
Compatibility

PLASTIC

GLASS

ALUMINUM

WOOD

Based on magnetostatics, the sensing layer adapts to many surface types, as long as they are non-ferromagnetic.

Optimized for AMR (Anisotropic Magneto-Resistive) magnetometer sensors, the sensing architecture scales with each project.

Sensor type, count, and layout are adjusted based on surface size, material, and required precision, ensuring the right balance between performance, cost, and power consumption.