MTS Sensors Temposonics R Series Datasheet

Magnetostrictive, Absolute, Non-contact
R-Series Models RP and RH
EtherCAT Industrial Ethernet Interface
®
Model RP Profile-style position sensor
FEATURES
„ Linear, Absolute Measurement
„ LEDs For Sensor Diagnostics
„ Superior Accuracy, Resolution down to 1 µm
„ Non-Contact Sensing Technology
„ Linearity Deviation Less Than 0.01%
„ Repeatability Within 0.001%
„ Direct EtherCAT Interface, Position + Velocity
„ 100 µs Position / Velocity Update Time, Regardless of
Overall Stroke Length
BENEFITS
„ Rugged Industrial Sensor
„ Position + Velocity Measurements For Up to 20 Magnets
APPLICATIONS
„ Continuous Operation In Harsh Industrial Conditions
„ High Pressure Conditions
„ For Accurate, High-Speed, Simultaneous Multi-Position
and Velocity Measurements
TYPICAL INDUSTRIES
„ Factory Automation
„ Fluid Power
„ Plastic Injection and Blow Molding
„ Material Handling and Packaging
EtherCAT is a registered trademark and patented technology licenced by
®
Beckhoff Automation GmbH, Germany
Temposonics
Linear-Position Sensors
Data Sheet
®
Model RH Rod-style position sensor
Time-based Magnetostrictive position sensing principle
Movable position magnet
Magnetic field encompasses
entire waveguide - generated
by the interrogation pulse
Interrogation
Return wire
Waveguide
Strain-Pulse detector
Bias magnet
Benefits of Magnetostriction
Temposonics linear-position sensors use the time-based magneto-
strictive position sensing principle developed by MTS. Within the
sensing element, a sonic-strain pulse is induced in a specially designed
magnetostrictive waveguide by the momentary interaction of two
magnetic fields. One field comes from a movable permanent magnet
that passes along the outside of the sensor. The other field comes
from an "interrogation" current pulse applied along the waveguide.
The resulting strain pulse travels at sonic speed along the waveguide
and is detected at the head of the sensing element.
The position of the magnet is determined with high precision and
speed by accurately measuring the elapsed time between the applica-
tion of the interrogation pulse and the arrival of the resulting strain
pulse with a high-speed counter. The elapsed time measurement is
directly proportional to the position of the permanent magnet and is
an absolute value. Therefore, the sensor's output signal corresponds
to absolute position, instead of incremental, and never requires
recalibration or re-homing after a power loss. Absolute, non-contact
sensing eliminates wear, and guarantees the best durability and output
repeatability.
All specifications are subject to change. Contact MTS for specifications and
engineering drawings that are critical to your application. Drawings contained
in this document are for reference only. Go to http://www.mtssensors.com for
the latest support documentation and related media.
®
SENS O RS
Document Part Number
551074 Revision B
Magnetic field from
position magnet
Interaction of magnetic
fields causes waveguide to
generate a strain pulse