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FIBER OPTICAL ACCELEROMETER

MEMS SENSOR HEAD for OEM integration

Sercalo's fiber optic accelerometer (FOA) is an opto-mechanical acceleration sensor. The standard measurement direction is along the axial direction. A different variant in the same form factor is available for radial measurement.

The sensing device is a micromechanical Silicon mirror (MEMS) which deflects a light beam proportional to the acceleration.

# FEATURES APPLICATIONS
1 • Reliable • Vibration sensing in harsh environment
2 • Insensitive to magnetic and electrical fields • Transformers and high voltage systems
3 • Antennas and Telecom Systems
4 • Aerospace
5 • Sensor Network

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MEMS SENSOR HEAD for OEM integration

Sercalo's fiber optic accelerometer (FOA) is an opto-mechanical acceleration sensor.

The sensing device is a micromechanical Silicon mirror (MEMS) which deflects a light beam proportional to the acceleration. It can be placed in a harsh environment and is separated from the measurement electronics by optical fibers.

The standard measurement direction is along the axial direction. A different variant in the same form factor is available for radial measurement.

The sensor head is available in a housing of either stainless steel or ceramic material (MACOR).

The steel housing is hermetically sealed and has a laser welded collimator. No epoxy is present in the optical path. This ensures an outstanding long term stability.

The miniature package withstands rugged environments and is intended for integration in customer defined packages.

The component is compliant to RoHS requirements 2015/863/EU.

TECHNICAL SPECIFICATIONS

 UnitMinTypMax
Sensor  
Max Frequency (-3dB bandwidth) Hz 1100    
Minimum frequency  Hz 0.5    
Linearity (dB/g) between 10 – 500 Hz  %     3
Maximum Acceleration Range g     40
Maximum Shock Acceleration g     1500
Noise Density µg/µHz     100
Sensitivity  dB/g   0.06  
Temperature range FOAS  °C -40    85
Temperature range c-FOAS  °C -40   155
Temperature coefficient Sensitivity  %/°C   tbd  
Temperature coefficient bias  dB/°C Canceled out by electronics (autotune)
Signal Conditioner (EB-FOA card)
Nominal Sensitivity (Interface) mV/g   100  
Power Supply V 11.5 12 12.5
Output Impedance     10
Amplitude Non-linearity % 2.6 3.3 1
Transverse Sensitivity %     3
Temperature Range °C -40   85
Size mm 100x160
General Specifications
Immunity - 100% passive sensing design
Humidity %RH 0   95
Material of Sensor Head - Stainless Steel or MACOR
Optical Fiber Type - Multimode 100/125mm
Sensor Head Dimensions: Length x Diameter mm 28 x 6
RoHS Compliance   2015/863/EU (no exceptions)

     

 

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  Rue des Draizes 5,
     CH 2000 Neuchâtel
     Switzerland
  + 41 32 732 15 20
  + 41 32 732 15 29
  info@sercalo.com

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