Volumetric characterisation of waste deposits generated during the production of fertiliser derived from phosphoric rock by using LiDAR and electrical resistivity tomography

Martínez-Segura, Marcos A.; Vásconez-Maza, Marco D.; García-Nieto, María C.

doi:10.1016/j.scitotenv.2020.137076

Cited by 22 publications

(16 citation statements)

References 21 publications

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“…It was needed to adopt a singular procedure as the crypt of Saint Joseph is a fragile and sensitive archaeological building posing a real challenge for conventional ERT measurements. In this way, www.videleaf.com through the scientific literature, the employ of Wenner-Schlumberger array [1][2][3]18] or dipole-dipole array [4,7,19] is commonplace since they provide an excellent signal to noise ratio without compromising the investigation depth. Moreover, in recent indoor investigations, the employ of flat electrodes is being of common use [20] mainly because they do not compromise the floor conditions.…”

Section: Electrical Resistivity Tomographymentioning

confidence: 99%

“…As a result, geophysics has been extensively used in geology, mining, environmental studies, hydrogeology, agriculture, forensics, civil engineering, e.g. [1][2][3][4][5][6], and where their use in archaeology has not been different due to their proved capabilities. In fact, applied geophysics in archaeology is carried out in the early stages of a subsurface investigation, before any other invasive actions that could damage potential hidden structures, as a useful tool to guide and support all the whole process [7,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites A Case Study

Vásconez-Maza¹,

Martínez‐Pagán²,

Aktarakçi³

et al. 2021

Prime Archives in Material Science

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Section: Electrical Resistivity Tomographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites A Case Study

Vásconez-Maza¹,

Martínez‐Pagán²,

Aktarakçi³

et al. 2021

Prime Archives in Material Science

View full text Add to dashboard Cite

“…It was needed to adopt a singular procedure as the crypt of Saint Joseph is a fragile and sensitive archaeological building posing a real challenge for conventional ERT measurements. In this way, through the scientific literature, the employ of Wenner-Schlumberger array [1][2][3]13] or dipole-dipole array [4,6,14] is commonplace since they provide an excellent signal to noise ratio without compromising the investigation depth. Moreover, in recent indoor investigations, the employ of flat electrodes is being of common use [15] mainly because they do not compromise the floor conditions.…”

Section: Electrical Resistivity Tomographymentioning

confidence: 99%

“…As a result, geophysics has been extensively used in geology, mining, environmental studies, hydrogeology, agriculture, forensics, civil engineering, e.g. [1][2][3][4][5], and where their use in archaeology has not been different due to their proved capabilities. In fact, applied geophysics in archaeology is carried out in the early stages of a subsurface investigation, before any other invasive actions that could damage potential hidden structures, as a useful tool to guide and support all the whole process [6,7].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites: A Case Study

Vásconez-Maza

Martínez‐Pagán

Aktarakçi³

et al. 2020

Preprint

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This communication reports an improvement of the quality of the electrical data obtained from the application of electrical resistivity tomography method on archaeological studies. The electrical contact between ground and electrode enhances significantly by using carbomer-based gel during the electrical resistivity tomography measurements. Not only does the gel promote the conservation of the building surface under investigation, but it also virtually eliminates the necessity of conventional spike electrodes, which in many archaeological studies are inadequate or not permitted. Results evidenced an enhancement in the quality of the electrical data obtained in the order of thousands of units compared with those without using the carbomer-based gel. The potential and capabilities of this affordable gel make it appropriate to be applied to other geoelectrical studies beyond archaeological investigations. Moreover, it might solve corrosion issues on conventional spike electrodes, and electrical multicore cables usually provoked for added saltwater attempting to improve the electrical contact.

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“…It is also important to mention that LIDARs fixed on the ground are already extensively used for mapping and volume estimation. 24,25 The robotic system presented and evaluated in this article consists of (i) a quadrotor equipped with a commercial visual/inertial/sonar system 26 for low-level state estimation and a 3D LIDAR for localization and stockpile inventory, and (ii) a software that processes the data collected by the drone and provides the inventory of the warehouse. Both, the drone and the software, are automatic and require minimum human intervention.…”

Section: Introductionmentioning

confidence: 99%

An aerial robotic system for inventory of stockpile warehouses

Gago

Pereira

2021

Engineering Reports

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This article describes the development and evaluation of an aerial robotic system for smart inventory of stockpile warehouses. The system was developed to automatically measure piles of different bulk materials, such as phosphorus and potassium compounds, which are stored in bays of different sizes inside a warehouse. This warehouse configuration is very common among fertilizer and animal food industries in Brazil. While an inventory can be executed by a human technician, the insalubrious environment, the imprecision of the manual volume estimation, and the time spent by the technician to access the information motivate the automation of the process. The proposed system uses a multirotor electrical drone that navigates autonomously inside the warehouse while it acquires light detection and ranging (LIDAR) point cloud data. This data is used to build a three-dimensional (3D) model of the environment, which is then processed to identify the stockpiles of material and calculate their volumes.Since the environment is GPS-denied and its characteristics, including symmetry, illumination and texture, do not favor visual-or LIDAR-based localization, a drone navigation strategy that relies on relative positioning with respect to simple structures of the warehouse was developed. This article also presents our approach for autonomous stockpile volume estimation, which was numerically evaluated both in simulation and with real data, yielding in accuracy and precision of about 98%. The results presented in the article show that the aerial system is able to substitute the previously adopted manual procedure, highly increasing its accuracy, repeatably and safety, and drastically reducing its time of execution and cost.

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Volumetric characterisation of waste deposits generated during the production of fertiliser derived from phosphoric rock by using LiDAR and electrical resistivity tomography

Cited by 22 publications

References 21 publications

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites A Case Study

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites A Case Study

Enhancing Electrical Contact with a Commercial Polymer for Electrical Resistivity Tomography on Archaeological Sites: A Case Study

An aerial robotic system for inventory of stockpile warehouses

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