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Home/In-Situ Particle Detection

In-Situ Particle Detection

MTI Sales2017-12-07T14:40:26+00:00

Amplitude | Bending, Tensile & Compression | Depth | Dimensions | Displacement | Distance | Level | Metrology | Positioning | Presence/Absence | Robot Guide | Surface | Thickness | Tolerances

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In-Situ Particle Detection

Measurement Type

Presence/Absence

Description

Introduction: 

Foreign particles in food stuffs, plant produce, grains, etc. can lead to customer dissatisfaction when the items are packaged for sale. In some cases — it can be dangerous.

Opportunity: 

A major cigarette producer contacted MTI Instruments requesting a system to detect extraneous material, metal, plastic, filter fiber, and other contaminants.


Background: 

A cigarette’s dielectric footprint is controlled by the tobacco packing density, moisture content and the type of tobacco leaf.

  • – packing density is controlled by the manufacturing equipment and generally remains constant
  • – moisture is tightly controlled in the process and shouldn’t be a factor
  • – type of tobacco is generally predetermined and consistent as well

Since those three variables form the dielectric signature any contamination or deviation will show as an anomaly. 


Solution:

MTI proposed its new Digital Accumeasure TM amplifier with a dielectric probe having a 15 mm measuring range. The dielectric probe passes a 16 kHz electric field through the cigarette cylinder; this generates a signal proportional to the thickness of the cigarette. A new dielectric detection program was integrated, with the included Software Development Kit, to measure any deviation from nominal thickness. Foreign particles would appear as fast transient anomalies in the cigarette thickness. These anomalies were further characterized and alarm states were implemented. 

 

Contaminant Detection


MTI’s capacitance probes can be used to measure the thickness or density of many different kinds of substances from cloth to glass. They are a safe replacement for Beta Gauges, which have nuclear radiation sources and difficult regulatory requirements. For more information see Technology Principles on Capacitance Sensors. Call on us for some smoking hot deals on capacitance probes, Accumeasure TM amplifiers, and associated equipment.

Let our applications engineers light up your workload!

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