How do visual metal detectors differ from others?
Imaging detectors collect data and present it in a detailed report to the user. These detectors create 3D images supported with graphics, and help the user to meet the target with accuracy and precision. This, naturally saves considerable time by providing the user information to reach decisions on whether deep digs are necessary or not.
However, even the most advanced technology is not sufficient to provide an accurate and consistent image of the under the soil merely by providing signals, without any digging. No such technology exists yet.
However, Treasure Scanners using advanced technology are capable of determining the points where the signal begins and ends, on the basis of the type and power of the signal from the metal object, determining the reflection timing and attenuation of the signal through the application of advanced algorithms to come up with a color 3D representation on the screen.
Such images help the user ascertain the depth, dimensions, and type of the object in detail.
Imaging scanners process all measurements and data received during a scan, and come up with the parameters. High-efficiency processors and advanced software making use of the data available, guarantee a focus on the target, an accurate analysis of the environmental conditions, and an image-assisted search.
One should be aware that non-imaging detectors would provide the user only limited information regarding the scans and scan results.
On the other hand, there are certain simpler detectors, claiming to be imaging detectors, yet built on the principle of magnetometer, will usually provide only superficial results. The limited settings as well as reporting and real-time 3D video capabilities of such detectors will deprive the user of accurate results, comfort, accurate digging and depth data.
There are even detectors which present data from a database, without any reference to the real-time measurements taken, purely for deceptive purposes.
Some firms even go as far as trying to make an impression of "quality" in their products, by combining the detector with some popular and widely relied technological instruments such as computers, tablets or mobile phones.
These use slogans such as “We promise a clear picture of the under the soil”, and tend to market some accessories such as 3D Glasses along with the devices.
These are purely marketing stunts, and are aimed towards deceiving the customers. Such deceptive claims will not suffice to hide the defects and weaknesses of the detector marketed.
Sensitive and multi-dimensional research on imaging of gold deposits in particular were carried out by the scientists combining more than one technologies as part of the project "Hope" initiated by European Space Studies Center in 1999. The primary purpose of the research was to develop a mine scanning device equipped with extra sensors to provide imaging functions during identification and determination process, albeit in a form similar to a metal detector.
The project was concluded in year 2002 as it was judged that the research did not yield adequate results.
The project prototypes were able to identify a 30-40 cm wide anti-tank mine only in the range of 2-8 cm depth, whereas no image was acquired after the depth of 8-10 cm.
The objects the researchers themselves buried could be spotted and visualized only under specific conditions, and then again "with doubt" after a depth of 2-4 cm. This shows that obtaining images from under the soil, however crude they may be, is beyond the capabilities of today's technology. Unfortunately, the technology available don't allow us to achieve imaging of land mines, which is a crucial threat to human life in times of peace and war, precluding an easy way for their clearance.
However, graphs produced on the basis of sent or reflected signals allow us to generate real-time 3D graphs and reports to allow comparison against the reference values of metals, and to provide guidance to the user. This represents the most advanced Detection Technology of the day.
Imaging making use of the satellite technology as well as GPRS, providing under the soil images and coming up with results over the data are also among the detector marketing methods observed so far.
A comprehensible image received from a very advanced satellite would have a resolution of at most, 2-3 meters at the earth surface level. It is almost impossible to discern smaller objects. In a nutshell, it is not possible to obtain information or data regarding what lies under the soil using satellite imaging technology.
In particular, the ability to detect variations in soil composition and signal refraction, to operate in a consistent and stable manner over rough terrain, to analyze data using a combination of a powerful processor and software, and to present the data to the user in a very short time frame are among the features reserved for Imaging Detectors.
Therefore, real-time Imaging Detectors are clearly superior to simple metal detectors and other systems which claim similar characteristics.
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