Research on Measurement Technology of Moisture Content by Radio Frequency Method Based on Helical Antenna

2021 ◽  
Author(s):  
Dang Ruirong ◽  
Zong Li ◽  
Yang Pei ◽  
Cao Feng
Keyword(s):  
Moisture Content ◽  
Radio Frequency ◽  
Measurement Technology ◽  
Helical Antenna ◽  
Frequency Method

scholarly journals Rapid determination of meat moisture content using radio-frequency dielectric measurement

IEEE Access ◽  
2018 ◽  
pp. 1-1 ◽  
Author(s):  
Jianxu Wang ◽  
Lifeng Fan ◽  
Qiao Zhou ◽  
Jinhai Li ◽  
Pengfei Zhao ◽  
...  
Keyword(s):  
Moisture Content ◽  
Radio Frequency ◽  
Rapid Determination ◽  
Dielectric Measurement

scholarly journals Dielektrické vlastnosti zemědělských produktů a některé jejich aplikace

2008 ◽  
Vol 54 (No. 2) ◽  
pp. 104-112 ◽  
Author(s):  
S.O Nelson
Keyword(s):  
Dielectric Properties ◽  
Moisture Content ◽  
Radio Frequency ◽  
Fruits And Vegetables ◽  
Agricultural Products ◽  
Dielectric Heating ◽  
Quality Factors ◽  
Poultry Products ◽  
Microwave Dielectric ◽  
Microwave Dielectric Heating

The use of dielectric properties of agricultural products for sensing moisture in grain and seed and their application in radio-frequency and microwave dielectric heating is discussed briefly. Values for the dielectric properties of a number of products, including grain and seed, fruits and vegetables, and poultry products, are presented graphically to show the dependence of these properties on frequency, moisture content, and temperature. The potential for using the dielectric properties to sense quality factors other than moisture content is also considered.

Battery Storage Based Convict Tracking of Embedded Platform

2020 ◽  
pp. 193-196
Author(s):  
John De Britto C ◽  
Nagarajan S ◽  
Senthil Kumar R
Keyword(s):  
Heart Rate ◽  
Radio Frequency ◽  
Real Time ◽  
Control Room ◽  
Battery Storage ◽  
Frequency Method ◽  
Embedded Platform ◽  
The World ◽  
Secure Unit ◽  
The Law

There are many law writers in the world, Jail is the spot wherever all the law breakers are put behind the poles There are many probabilities in secure unit that convicts can run away from lockup. There are many types of machinery obtainable in and around the world, none of the effects helps to cut the probabilities of avoidance from the lock up, so we formed a system to keep the convict from avoidance from jail because lockup safety is also the municipal safety in the world. We used RF (Radio F, Actuator frequency) method to guard the lockup. essentially, in a set of connections the space between a pair of nodes is projected from the Radio Frequency (RF). So, we used this scheme to real time monitor the distance between the convict and the control room and we can observe the convicts heart rate. Once convicts try to cross the limit of the jail it gives the awareness to the control room.

In-Plane Moisture Content and Specific Gravity Evaluation of Oriented Strandboard Using a Radio Frequency Technique

2010 ◽  
Vol 60 (7) ◽  
pp. 622-628 ◽  
Author(s):  
Xiaojian Liu ◽  
Jilei Zhang ◽  
J. Patrick Donohoe ◽  
Philip H. Steele
Keyword(s):  
Specific Gravity ◽  
Moisture Content ◽  
Radio Frequency ◽  
Oriented Strandboard

Fine Structure ofn=3Hydrogen by a Radio-Frequency Method

1956 ◽  
Vol 103 (2) ◽  
pp. 313-314 ◽  
Author(s):  
W. E. Lamb ◽  
T. M. Sanders
Keyword(s):  
Fine Structure ◽  
Radio Frequency ◽  
Frequency Method

scholarly journals Quality of Milled Rice from Large-Scale Dried Paddy Rice by Hot Air Combined with Radio Frequency Heating

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2277
Author(s):  
Karn Chitsuthipakorn ◽  
Sa-nguansak Thanapornpoonpong
Keyword(s):  
Moisture Content ◽  
Radio Frequency ◽  
Block Design ◽  
Specific Energy Consumption ◽  
Brown Rice ◽  
Convective Drying ◽  
Control Treatment ◽  
Rf Heating ◽  
Drying Time ◽  
Hot Air

A scaled-up process for paddy drying was developed using hot air (HA) combined with radio frequency (RF) heating. The study was conducted using hot air (control treatment) arranged in descending order in four temperature levels, namely 80 °C at moisture content of 25–26%, 70 °C at moisture content of 20–25%, 60 °C at moisture content of 17–20%, and 50 °C at moisture content of 13–17%, as well as with hot air combined with radio frequency (HA/RF) at different paddy temperatures (45–60 °C) by adjusting the appropriate RF energy when passing through RF heating chamber, namely HA/RF45, HA/RF50, HA/RF55, and HA/RF60. Each treatment was performed in three replicates and data were statistically analyzed in a randomized complete block design. The quality attributes of paddies affected by the drying process were assessed: fissure percentage, color, milling quality, and sensory evaluation. The drying efficiency showed that the drying time and the specific energy consumption could be decreased by up to 54.44% and 23.17% at HA/RF60 and HA/RF45, respectively. As the RF heating temperature increased, the fissure percentage of brown rice kernels at HA/RF45 and HA was not significantly impacted. Regarding color evaluation, combining RF heating and convective drying at all given conditions could be statistically applied in terms of the b*, WI, and ΔE* value. Considering the milling yield of HA as the baseline, head rice yield was maximized at HA/RF45, while bran yield reached the maximum at HA/RF60. The liking score of cooked rice after it was dried using the HA method was the highest. This study concludes that the HA/RF45 was the most appropriate drying condition, and this may provide preliminary exposure to the industrial drying of paddies.

scholarly journals Effects of Moisture, Temperature, and Salt Content on the Dielectric Properties of Pecan Kernels During Microwave and Radio Frequency Drying Processes

Foods ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 385 ◽  
Author(s):  
Zhang ◽  
Li ◽  
Cheng ◽  
Wang ◽  
Ding ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Moisture Content ◽  
Radio Frequency ◽  
Salt Content ◽  
Rf Heating ◽  
Dielectric Heating ◽  
Time Histories ◽  
Properties Of Materials ◽  
Content Range ◽  
Temperature Time

Dielectric properties of materials influence the interaction of electromagnetic fields with and are therefore important in designing effective dielectric heating processes. We investigated the dielectric properties (DPs) of pecan kernels between 10 and 3000 MHz using a Novocontrol broadband dielectric spectrometer in a temperature range of 5–65 °C and a moisture content range of 10–30% wet basis (wb) at three salt levels. The dielectric constant (ε′) and loss factor (ε′′) of the pecan kernels decreased significantly with increasing frequency in the radio frequency (RF) band, but gradually in the measured microwave (MW) band. The moisture content and temperature increase greatly contributed to the increase in the ε′ and ε′′ of samples, and ε′′ increased sharply with increasing salt strength. Quadratic polynomial models were established to simulate DPs as functions of temperature and moisture content at four frequencies (27, 40, 915, and 2450 MHz), with R2 > 0.94. The average penetration depth of pecan kernels in the RF band was greater than that in the MW band (238.17 ± 21.78 cm vs. 15.23 ± 7.36 cm; p < 0.01). Based on the measured DP data, the simulated and experimental temperature-time histories of pecan kernels at five moisture contents were compared within the 5 min RF heating period.

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