An In-Situ Assessment of Wood-in-Service Using Microwave Technologies, with a Focus on Assessing Hardwood Power Poles

Brodie, Graham; Thanigasalam, Deepan Babu; Farrell, Peter M.; Kealy, Allison; French, J. R. J.; Ahmed, Berhan M.

doi:10.3390/insects11090568

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…It is unclear whether they can attack denser timbers, but the results indicate that the device has a limited ability to detect infestations in denser timbers. While this would be a limitation in larger timbers and poles (Brodie et al, 2021), it poses less of an issue in building components. Subsequent trials using 38 mm thick radiata pine samples with densities ranging from 392 to 781 kg/m 3 showed that the device could only detect termites in samples with densities less than or equal to 512 kg/m 3 (Table 4).…”

Section: Effect Of Wood Density and Grain Orientationmentioning

confidence: 99%

Non-destructive Detection of an Invasive Drywood Termite, Cryptotermes brevis (Blattodea: Kalotermitidae), in Timber

McDonald¹,

Fitzgerald²,

Hassan

et al. 2022

Sociobiology

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Reliable drywood termite detection in structures is challenging but is critical for effective management. A microwave-based non-destructive method was evaluated for detecting termite activity. This study evaluated factors affecting the ability of this device to reliably detect Cryptotermes brevis in timber. The device displayed a high probability of successfully detecting C. brevis in naturally infested boards. The system detected termites 97% of the time when used at the highest sensitivity level, while producing few false positives. The number of termites did not affect detection ability, and detectable signals were produced even when a single termite was present. Detection success decreased with both increasing wood density and testing perpendicular to the grain in abrupt transition timber species. The device detected termites to a maximum depth of 45 mm in southern pine (Pinus spp.), but sensitivity declined with increased wood density with the detection limit declining to only 20 mm in denser Tasmanian oak (Eucalyptus spp). The device could only detect termites in samples with densities between 392 to 511 kg/m3 in 38 mm thick radiata pine samples. The results support the ability of microwaves to reliably detect C. brevis in timber.

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Section: Effect Of Wood Density and Grain Orientationmentioning

confidence: 99%

Non-destructive Detection of an Invasive Drywood Termite, Cryptotermes brevis (Blattodea: Kalotermitidae), in Timber

McDonald¹,

Fitzgerald²,

Hassan

et al. 2022

Sociobiology

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show abstract

“…The HB 100 Doppler radar sensor is widely used for motion detection thanks to its low cost and high reliability [11][12]. Recently, the HB 100 sensor was used for additional functions such as underground metal detection [13] or wooden pole inspection in forests [14]. Unfortunately, up to now, there are very few studies on the use of the sensor for detecting additive materials in concrete.…”

Section: Introductionmentioning

confidence: 99%

A Non-destructive Radar Device for Detecting Additive Materials in Concrete

Quy,

Dao,

Trung

2023

Eng. Technol. Appl. Sci. Res.

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The use of electronic devices based on electromagnetic waves is promising for inspecting additives in structural concrete. However, the existing commercial devices are high-cost and do not publicly provide circuit design information. To overcome this issue, this study designed a low-cost nondestructive testing device with a radar sensor, using an HB-100 radar sensor module to generate and receive the radar wave. A suitable bandpass filter was used to suppress electrical noise in the received signal, an Arduino board was used for signal processing, and the measured data were displayed on a computer. The output at the IF pin of the sensor module presents the Doppler frequency and absorbance of the target materials. The device was tested to detect additives inside the concrete. An additive material can be recognized by the fact that the obtained signal magnitudes are different with different additive materials. The findings in this study can contribute to making a low-cost nondestructive testing device based on radar technology for structural concrete inspection.

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Agricultural Engineering

Brodie

2022

Agritech: Innovative Agriculture Using Microwaves and Plasmas

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An In-Situ Assessment of Wood-in-Service Using Microwave Technologies, with a Focus on Assessing Hardwood Power Poles

Cited by 6 publications

References 23 publications

Non-destructive Detection of an Invasive Drywood Termite, Cryptotermes brevis (Blattodea: Kalotermitidae), in Timber

Non-destructive Detection of an Invasive Drywood Termite, Cryptotermes brevis (Blattodea: Kalotermitidae), in Timber

A Non-destructive Radar Device for Detecting Additive Materials in Concrete

Agricultural Engineering

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