VDW Verein Deutscher Werkzeugmaschinenfabriken e.V.

The LFS system consists of a Drag Force Flow (DFF) sensor, the Lenterra Optical Interrogator (LOI) and a ruggedised laptop with bespoke
software.

The system provides an in-line, real-time assesssment of powder flow enabling improvements in process understanding and manufacturing efficiency in various industries.

FEATURES

• In-line, real-time measurement of material properties and temperature
• Multi-directional sensitivity
• Chemically resistant construction
• Fibre optic connectivity

APPLICATIONS

• High Shear Wet Granulation
• Blending
• Feeding
• Spray drying / drying

HOW IT WORKS

The DFF sensor consists of a hollow pillar mounted on a stationary base, containing two optical strain gauges, Fibre Bragg Gratings (FBGs). The LOI is connected to the FBGs via a fibre optic cable and continuously monitors the FBG spectra. When the pillar is deflected by flow, one FBG becomes extended and the other one is compressed, leading to a shift in wavelength spectra. A larger deflection results in a greater shift.

When the probe is immersed in a moving powder or material, the DFF sensor bends under the force of the flow. The magnitude of the deflection is continuously measured and quantifies the drag force in realtime, which is a function of material properties such as size, density, adhesion and strength, allowing operators to assess material properties in-process.

BENEFITS

• Enhance process understanding
• Improve product quality and consistency
• Optimise cycle times
• Accelerate / simplify scale up
• Minimise ‘out of specification’ material and rework
• Improve compliance
• Reduce costs (rework, resample, retesting etc.)

For more information please visit the Freeman Technology website.