World Grain - June 2020 - 74

TECHNICAL PROFILE: SILO MONITORING 2.0

with grain of elevated moisture and
temperature. A sudden small rise of
the CO2 prescribes an unstable condition. We have silo B with grain of low
moisture and temperature. A higher
CO2 concentration is recorded but the
algorithm doesn't issue an alert since
the grain condition is deemed good.

PHOSPHINE FUMIGATIONS
MONITORING
Traditional methods of monitoring systems for fumigation applications employ toxic gas sensors that use suction.
These kinds of sensors are bulky, hard
to use, have low sample frequency and
often involve human interaction making
them prone to human error.
Advances in technology now permit
their replacement by wireless sensors,
such as the ones developed by Centaur
Analytics. An importance of precisely
PRQLWRULQJ D IXPLJDWLRQ LV WKH ÀXFtuation of the phosphine concentration.
7KH IXPLJDQW FRQFHQWUDWLRQ ÀXFWXDWHV
between night and day, sometimes drop74

June 2020 / World Grain / www.World-Grain.com

Photos courtesy of Centaur

MONITORING GRAIN MOVEMENTS
It is vital for silo managers to be able
to monitor the quantity of the available product. For grain silos, a fill
level sensor is commonly used. A
fill level sensor is a contactless radar system that measures the distance
between the sensor (usually mounted
on the silo roof) and the grain surface
accurately.
To translate the measured distance to
total grain mass stored one should consider the following variables:
x Grain bulk density (varies with moisture content).
x Pack factor (varies with grain height).
x Grain surface shape (varies with
the operation: loading, emptying).
The real-time monitoring of the product
quantity in a silo includes an advanced
algorithm that considers the above parameters and translates the distance meaVXUHG E\ WKH ¿OO OHYHO VHQVRU WR DFFXUDWH
calculations of the grain mass and volume. Monitoring grain in real time with
precision supports a unique traceability system.


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World Grain - June 2020

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http://digital.world-grain.com/sosland/wg/2009_08_01
http://digital.world-grain.com/sosland/wg/2009_07_01
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