MICRONOR introduces the world’s first commercially-available
absolute Fiber Optic Position Sensor (FOPS). The Model MR330 series position
sensor is an innovative all-optical design immune to any electro-magnetic
interference such as lightening, radiation, magnetic fields and other harsh
environmental conditions. The fiber optic aspect of the sensor also makes it
perfectly suited for long distance position sensing over hundreds of meters
without being affected by ground loop problems. The FOPS system is based on
Micronor’s years of research, innovation and patents in fiber optic sensing
technology.
The new absolute FOPS uses a novel optical technique embedded
in a passive sensor and active controller connected by a duplex fiber optic
link. The controller transmits a burst of light to the code disk in the sensor
which accurately modulates the spectral components of the light based on
angular position. The position information is imprinted in the optical spectrum
of the light and guided back to the controller for a precise position readout.
The sensor requires no electrical power and houses no electronic components
whatsoever.
The MR330’s accuracy and EMI immunity make it an ideal
sensor for applications that require precise motion control and position
measurement in challenging environments: oil rigs, satellite antennas, solar
panel arrays, actuator systems, transportation systems, steel mills and medical
instrumentation. The sensor is also classified as a “simple apparatus” and meets
ATEX requirements for use in mines and other hazardous environments. The sensor’s
immunity to lightning make it especially suited for outdoor applications such
as wind turbines and antennas.
This innovative product measures absolute angular position
from 0° to 360° with 13-bit (8192 count) resolution at speeds exceeding 2500
rpm. A complete system consists of the MR332 Passive Sensor, and MR330
Controller which interconnect via a duplex fiber optic link. The fiber cable
used is readily available industry standard 62.5/125µm multimode fiber with Duplex
LC connections. The MR330 controller is powered by 24 VDC and features multiple
built-in interfaces and protocols for position read-out making it compatible
with most any motion systems.
The MR330 controller’s powerful embedded processor and
firmware offers an extended set of built-in functions and multiple interface
options not available in conventional encoders or resolvers. The Model MR330-1
SSI Controller offers SSI, USB, RS485 Serial, Modbus RTU, two analog outputs
(4-20mA and ±10V) and two digital set points.
