A PCB Sensor for Status Monitoring of Stored Food Stocks

Dean, Robert N.; Craven, Jeffery D.; Guertal, Elizabeth A.; Varnavas, Kosta

doi:10.1109/lsens.2019.2902837

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…Sensors. Low-cost fringing fields capacitive sensors using conventional metal grids or PCB fabrication techniques have been successfully presented for many applications, like soils [10], cereal grains [11], air [12,13], and human skin [14].…”

Section: Principle Of Operation Of Fringing Field Capacitivementioning

confidence: 99%

Fringing Field Capacitive Smart Sensor Based on PCB Technology for Measuring Water Content in Paper Pulp

Morais

Carvalhaes-Dias²,

Duarte

et al. 2020

Journal of Sensors

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We present a capacitive smart sensor based on printed circuit board (PCB) technology to measure the amount of water content in a paper pulp at the wet end of a paper machine. The developed sensor incorporates in the same PCB the signal processing circuits. It is a handheld portable device, and its output is sent to the reading equipment using a Bluetooth wireless connection, providing to the sensor’s operator ease of mobility around the wet end of a paper machine. The prototype was tested in a laboratory, using a wire mesh to emulate the end of a paper machine, and we were able to measure and easily detect when it reaches the water content in the range of 90% to 92%, as required in the paper fabrication process. Standard deviation of the capacitance measurements at various moisture levels is four orders of magnitude smaller than the mean. The smart sensor was tested in the 20°C to 40°C temperature range, in a paper pulp with a gravimetric water content of 91%. Since the variation of capacitance with temperature is practically linear, we propose a simple linear compensation equation to correct the observed sensitivity with the temperature. To keep the signal processing circuits small, low cost, simple, and robust, a novel direct interface sensor to microcontroller circuit technique was used to make the capacitive measurement, allowing for measuring small capacitance deviations without high-frequency oscillators. It was shown that it is possible to integrate the signal processing circuits in the top layer of the PCB interdigitated sensor without adding noise or degrading the performance of the capacitive sensor.

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Section: Principle Of Operation Of Fringing Field Capacitivementioning

confidence: 99%

Fringing Field Capacitive Smart Sensor Based on PCB Technology for Measuring Water Content in Paper Pulp

Morais

Carvalhaes-Dias²,

Duarte

et al. 2020

Journal of Sensors

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“…Fringing field capacitive sensors have been used in numerous applications for moisture-sensing agricultural commodities such as corn kernels (Dean et al, 2019), wheat grain (McIntosh and Casada, 2008), as well as materials such as paper pulp (Morais et al, 2020) and soil (Goswami et al, 2019). A fringing field capacitive sensor consists of repeated coplanar electrodes over the substrate.…”

Section: Introductionmentioning

confidence: 99%

Measurement of moisture contents in concrete blocks using fringing field spiral capacitive sensors

Oommen

Philip

2023

Transactions of the Institute of Measurement and Control

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This work reports the design and development of a fringing field, planar capacitive sensor with spiral configuration for measuring moisture contents in concrete blocks, following printed circuit board technology. This method is non-destructive, non-intrusive, cost effective, and provides rapid results. The performances of the fabricated sensors are evaluated with experiments on three different types of concrete blocks. The measured capacitance values are plotted against moisture contents in concrete blocks, measured following the standard gravimetric method. As moisture contents in concrete blocks increase from 0% to 11.34%, the corresponding interelectrode capacitance, which is a measure of the moisture contents, is found to increase by nearly 74%, providing high moisture content sensitivity for the method. The results of the measurements are presented and the implications of the results discussed in the paper. A comparison of the relevant technical parameters of the present system with those of existing technologies are also presented and discussed.

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“…has worked upon the technology for storing the food grains after post harvesting in [5]. Sensor based warehouse monitoring has been studied in [6,7]. Mona Haji has studied the major role of technology in the food PriMera Scientific Engineering https://primerascientific.com/psen IOT based Smart Food Grain Storage Monitoring System for Silos using Google Apps Script 15 storage monitoring system [8].…”

Section: Introductionmentioning

confidence: 99%

IOT based Smart Food Grain Storage Monitoring System for Silos using Google Apps Script

2023

PSEN

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This work is carried out to develop a system to maintain silos in a safe and hygienic environment to store food grains by monitoring them at regular intervals. We keep track of the parameters in the silo such as temperature, humidity, and carbon-di-oxide level concentrations. Values recorded at regular intervals of time help us analyze and visualize the data and observethe effects of these parameters on the food grains stored, while providing protection against pests, rodents and other organisms that can affect the yield. It has also been observed that while the grains are stored in such silos, due to the natural processes we have a lot of carbon-di-oxide concentration in the silos which has caused many fatal deaths of farmers. This issue has been mitigated in this work by implementing an emergency procedure which will be activated to open the grain bin and release the toxic gases from the silo. Through this work, we believe we can innovate in the grain storage space and solve the problems faced by the farmers.

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A PCB Sensor for Status Monitoring of Stored Food Stocks

Cited by 13 publications

References 20 publications

Fringing Field Capacitive Smart Sensor Based on PCB Technology for Measuring Water Content in Paper Pulp

Fringing Field Capacitive Smart Sensor Based on PCB Technology for Measuring Water Content in Paper Pulp

Measurement of moisture contents in concrete blocks using fringing field spiral capacitive sensors

IOT based Smart Food Grain Storage Monitoring System for Silos using Google Apps Script

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