Wireless sensors for quality monitoring and management of stored grain inventories

Aby, Guy Roger

doi:10.31274/etd-20200902-0

Cited by 1 publication

(1 citation statement)

References 20 publications

(27 reference statements)

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“…In recent years, advancements in sensor technology have provided grain storage operators with two primary options for temperature monitoring: cable-based sensors and wireless sensors [1]. Cable-2 based sensors utilize physical cables that traverse through the grain mass with sensors located at some predetermined location, while wireless sensors (cableless) offer options for sensors to be randomly distributed within the stored grain mass [2][3][4]. Understanding the comparative effectiveness of these sensor types and their relationship with the number and distribution of sensors in different silo sizes is a critical aspect of optimizing grain storage operations.…”

Section: Introductionmentioning

confidence: 99%

Number of Sensors Needed to Achieve Reliable Aeration Cooling During the Fall Harvest and Monitoring of Grain Quality During the Non-Aerated Storage Period Based on Predicted Temperatures in a Grain Mass Using Cable-Based Sensors Versus Wireless Sensors a

Aby¹,

Maier²

2023

Preprint

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Monitoring the quality of stored bulk grain is generally done using temperature cables hung from silo roofs. Little investigation has been done into the effects of number of sensors and their placement in terms of reliability of the monitoring system with regard to making stored grain quality management decisions. A previously developed 3D finite element simulation model was verified and used to investigate these aspects. In the first study, a silo was loaded with about 228.6 Mg (9000 bushels) of maize and six temperature cables were placed in the grain mass. The maize was aerated continuously for a period of two weeks, and the cable sensor temperatures were compared to the predicted temperatures which were in close agreement with the observed readings. The standard error of prediction ranged from 2.0 to 3.7°C. In the second study, 15 and 30 sensors were placed at manufacturer recommended depths and horizontal locations in the grain mass of three silo sizes (i.e., 11x11, 14.6x14.6 and 14.6x18.3 m diameter by eave height). The average grain temperatures predicted by the 15 and 30 sensors over a one-year simulation period were compared to the average grain temperatures predicted for the entire grain mass (1968, 3052, and 3204 mesh nodes). The number of sensors needed to monitor stored grain temperatures reliably in the three silo sizes investigated heavily depended on whether the aeration control strategy achieved a sufficiently low temperature by the time the aeration fans were turned off and sealed ahead of the non-aerated storage period. Fifteen or 30 sensors were sufficient to monitor grain temperatures during the aeration cooling period but for the two larger silo sizes more than 30 sensors would be needed during the storage period. As silo size increased, and surface-to-volume ratio decreased, grain temperatures remained lower during the storage period. Results support the best management practice recommendation of leaving cooled grain cold and not warming it up in the spring ahead of storage into the summer.

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Section: Introductionmentioning

confidence: 99%

Number of Sensors Needed to Achieve Reliable Aeration Cooling During the Fall Harvest and Monitoring of Grain Quality During the Non-Aerated Storage Period Based on Predicted Temperatures in a Grain Mass Using Cable-Based Sensors Versus Wireless Sensors a

Aby¹,

Maier²

2023

Preprint

View full text Add to dashboard Cite

show abstract

Wireless sensors for quality monitoring and management of stored grain inventories

Abstract: 4.3.4 Experiment 4: Determine the equilibrium moisture content in maize samples as a function of temperature and relative humidity measured by the precision sensor and compare against the wireless sensors .

Cited by 1 publication

References 20 publications

Number of Sensors Needed to Achieve Reliable Aeration Cooling During the Fall Harvest and Monitoring of Grain Quality During the Non-Aerated Storage Period Based on Predicted Temperatures in a Grain Mass Using Cable-Based Sensors Versus Wireless Sensors a

Number of Sensors Needed to Achieve Reliable Aeration Cooling During the Fall Harvest and Monitoring of Grain Quality During the Non-Aerated Storage Period Based on Predicted Temperatures in a Grain Mass Using Cable-Based Sensors Versus Wireless Sensors a

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