8
Temposonics
®
GTE Analog ATEX / NEC / CEC
Operation Manual
4.1 Functionality and system design
Product designation
• Position sensor Temposonics
®
G-Series
Sensor model
• Temposonics
®
GTE (rod sensor)
Stroke length
• Stroke length: 50…2540 mm (2…100 in.)
Output signal
• Analog
Application
Temposonics
®
position sensors are used for measurement and
conversion of the length (position) variable in the elds of automated
systems and mechanical engineering.
The GTE type sensors consist of several (in this case two) independent
sensor channels in one housing for redundancy. That means, they
contain two waveguides, two independent electronics and two output
cables.
The adjustment of the setpoints (null/span) is possible in 100 % of
the electronical stroke length with 50 mm (2 in.) minimum distance
between each setpoint.
The GTE sensors are designed as sensors to be embedded into
hydraulic cylinders. This means that part of the mechanical protection
is done by the hydraulic cylinder rather than by the sensor itself.
Principle of operation and system construction
The absolute, linear position sensors provided by MTS Sensors
rely on the company’s proprietary Temposonics
®
magnetostrictive
technology, which can determine position with a high level of
precision and robustness.
Each Temposonics
®
position sensor consists of a ferromagnetic
waveguide, a position magnet, a strain pulse converter and supporting
electronics. The magnet, connected to the object in motion in the
application, generates a magnetic eld at its location on the waveguide.
A short current pulse is applied to the waveguide. This creates a
momentary radial magnetic eld and torsional strain on the waveguide.
The momentary interaction of the magnetic elds releases a torsional
strain pulse that propagates the length of the waveguide. When the
ultrasonic wave reaches the end of the waveguide it is converted
into an electrical signal. Since the speed of the ultrasonic wave in the
waveguide is precisely known, the time required to receive the return
signal can be converted into a linear position measurement with both
high accuracy and repeatability.
Fig. 2: Time-of-ight based magnetostrictive position sensing principle
4. Product description and commissioning
5
3
1
2
4
Measurement cycle
1 Current pulse generates magnetic eld
2
Interaction with position magnet eld
generates torsional strain pulse
3 Torsional strain pulse propagates
4 Strain pulse detected by converter
5 Time-of- ight converted into position
Sensing element (waveguide)
Position magnet (magnetic eld)
Torsional strain pulse converter
To Next Page
Loading...
