Eddy-current linear position sensor
An eddy-current linear position sensor delivers a signal
proportional to the linear position of a metallic cursor
fi xed to a moving part. Primary and secondary windings are printed on a common printed circuit (PCB). The primary windings are energized to generate a high frequency magnetic fi eld, which leads to eddy currents in the cursor. The eddy currents modify the coupling between primary and secondary windings depending on the position of the cursor. An ASIC is used to condition the signal, generally mounted on the PCB that also carries the printed coil windings.
Electricfil UPCOMING technologies
Characteristics
- Stroke up to 50 mm
- Temperatures up to 150°C
- Typical accuracy: ± 2%
- Response time: 1 ms
- Airgap up to 2.0 mm
- Size: stroke length + 30 mm
- Integrated diagnostics
- Non-contact sensing
- Totally insensitive to external magnetic fields
- Optional redundancy
Electricfil knowhow
- Integration in sensor clusters or mechatronic modules
- Wide range of packages and interfaces
- Fully programmable sensors
Application domains
Par domaine
Par application
- LVDT
- Hall position sensor
- Eddy-current position sensor
- Hall position switch
- VR speed/position sensor
- Active Hall-GMR sensor
- Oil temperature
- Multi-sensor modules
- Ignition wire set
- Integrated ignition units
- Integrated ignit.coil & wire set
- Pencil coils
- Eddy-current speed sensor
- Smart battery sensor
- Hall current sensor
- Temperature sensor
- Active speed/position sensor
- Active speed/pos./direction
- Magnetic ring system
- Magnetic ring module
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- En Europe
- En Amérique
- En Asie et Océanie