A novel low-cost, high-precision sea temperature sensor for coral reef monitoring

Hendee, James C.; Amornthammarong, Natchanon; Gramer, Lewis J.; Gomez, A. M.

doi:10.5343/bms.2019.0050

Cited by 7 publications

(6 citation statements)

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“…When calibrated properly, a platinum resistance sensor can achieve accuracy of less than a 0.001 °C [ 69 ]. In addition, compared with other temperature sensors, platinum resistive sensors are smaller which means a faster response time [ 70 ]. Thermistors are also commonly used for temperature measurements.…”

Section: Temperature Sensorsmentioning

confidence: 99%

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CTD Sensors for Ocean Investigation Including State of Art and Commercially Available

Xiao

Zhang

Liu

et al. 2023

Sensors

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Over 70% of the earth’s surface is covered by oceans; globally, oceans provides a huge source of wealth to humans. In the literature, several sensors have been developed to investigate oceans. Electrical conductivity temperature depth (CTD) sensors were used frequently and extensively. Long-term accurate CTD data is important for the study and utilization of oceans, e.g., for weather forecasting, ecological evolution, fishery, and shipping. Several kinds of CTD sensors based on electrics, optical, acoustic wave and radio waves have been developed. CTD sensors are often utilized by measuring electrical signals. The latest progress of CTD sensors will be presented in order of performance. The principles, structure, materials and properties of many CTD sensors were discussed in detail. The commercially available CTD sensors were involved and their respective performances were compared. Some possible development directions of CTD sensors for ocean investigation are proposed.

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Section: Temperature Sensorsmentioning

confidence: 99%

“…The average error of the sensor is less than 2.9%. A high precision fiber optic Fabry-Perot pressure sensor with pressure sensitivity of 257.79 nm/MPa is introduced by Yanan Zhang [ 70 ]. This pressure sensor is based on an AB epoxy adhesive film.…”

Section: Depth Sensorsmentioning

confidence: 99%

CTD Sensors for Ocean Investigation Including State of Art and Commercially Available

Xiao

Zhang

Liu

et al. 2023

Sensors

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“…The sensitivity experiments for the temperature measurements involv cooling tests, and included separate systems for testing the water temp ; low-speed crystal oscillator 2 ; high-speed crystal oscillator 3 ; data storage chip 4 ; low-power linear voltage regulator chip 5 ; type-c data communication interface 6 ; rechargeable storage battery 7 ; TS-V1 temperature probe 8 ; ritanium alloy shell cap 9 ; titanium alloy shell bottle body Figure 2a ①). Meanwhile, a high-speed clock crystal (depicted in Figure 2a ③) supplies timing signals to the integrated internal counter.…”

Section: Experimental Design Of Measurement Parameters and Deployment...mentioning

confidence: 99%

“…In addition, satellites only measure the near-surface layer of the water body and may not reliably measure the potential impacts of the water temperature on benthic ecosystems. The combination of remote sensing with in situ methods can improve the quality of water temperature monitoring activities [7,8]. Previous studies have shown that water temperature records based on available in situ measurements are effective for many purposes provided there is sufficient instrument spacing and precision [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Smart Temperature Sensor Design and High-Density Water Temperature Monitoring in Estuarine and Coastal Areas

Wang,

Cai,

Jia

et al. 2023

Sensors

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Acquiring in situ water temperature data is an indispensable and important component for analyzing thermal dynamics in estuarine and coastal areas. However, the long-term and high-density monitoring of water temperature is costly and technically challenging. In this paper, we present the design, calibration, and application of the smart temperature sensor TS-V1, a low-power yet low-cost temperature sensor for monitoring the spatial–temporal variations of surface water temperatures and air temperatures in estuarine and coastal areas. The temperature output of the TS-V1 sensor was calibrated against the Fluke-1551A sensor developed in the United States and the CTD-Diver sensor developed in the Netherlands. The results show that the accuracy of the TS-V1 sensor is 0.08 °C, while sensitivity tests suggest that the TS-V1 sensor (comprising a titanium alloy shell with a thermal conductivity of 7.6 W/(m °C)) is approximately 0.31~0.54 s/°C slower than the CTD-Diver sensor (zirconia shell with thermal conductivity of 3 W/(m °C)) in measuring water temperatures but 6.92~10.12 s/°C faster than the CTD-Diver sensor in measuring air temperatures. In addition, the price of the proposed TS-V1 sensor is only approximately 1 and 0.3 times as much as the established commercial sensors, respectively. The TS-V1 sensor was used to collect surface water temperature and air temperature in the western part of the Pearl River Estuary from July 2022 to September 2022. These data wells captured water and air temperature changes, frequency distributions, and temperature characteristics. Our sensor is, thus, particularly useful for the study of thermal dynamics in estuarine and coastal areas.

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“…Although remote sensing offers broad-scale monitoring, it cannot distinguish individual coral colonies (Candela et al, 2021). In addition, expensive operational costs limit its widespread use (Hendee et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Fine-Grained Analysis of Coral Instance Segmentation using YOLOv8 Models

Hassanudin,

Utomo,

Apriyanto

2024

SinkrOn

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Within the geographical boundaries of Indonesia, coral reefs flourish as intricate ecosystems bustling with a variety of marine creatures that play a crucial role, in preserving biodiversity. However this delicate harmony faces threats from climate change and human activities, leading to the risk of species loss. Despite growing awareness surrounding these challenges effectively and swiftly monitoring conditions remains a task. Existing methods for assessing corals often fall short due to requiring extensive specialist knowledge, lacking large-scale coverage, and being costly to implement. To tackle these obstacles this research suggests an approach for automated reef monitoring using instance segmentation with a YOLOv8 model. Leveraging YOLOv8 segmentation capabilities enables efficient analysis of corals. A systematic process is employed involving data collection, preparation (including techniques like Histogram Equalization), training the model on a reef dataset, model evaluation and enhancing the segmentation mask. The outcomes reveal the YOLOv8m Pp model with 96.7% precision 95.9% recall rate and a mean Average Precision (mAP50) score of 98.2%. This study demonstrates the potential of YOLOv8 to accurately segment instances for monitoring reefs in Indonesia, hence facilitating improved conservation strategies.

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A novel low-cost, high-precision sea temperature sensor for coral reef monitoring

Cited by 7 publications

References 0 publications

CTD Sensors for Ocean Investigation Including State of Art and Commercially Available

CTD Sensors for Ocean Investigation Including State of Art and Commercially Available

Smart Temperature Sensor Design and High-Density Water Temperature Monitoring in Estuarine and Coastal Areas

Fine-Grained Analysis of Coral Instance Segmentation using YOLOv8 Models

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