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I propose we to write and edit an collaborative article "How should EMI sensors work" on the same way as are continuous improved articles in Wikipedia. Our article is intended for amateur designers of metal detectors to compose block diagram of a most sophisticated sensor, which must be superior in sensitivity and information for target. The sophisticated sensor will be used in a future metal detector GLEANER, which can glean, ie it can find targets in the places that have already been searched by other metal detectors.
If writing and editing of such an article goes well, we will proceed the same way (by collectively writing and editing articles) to design block diagram for GLEANER. Of these articles, we can determine a Wikibook "Textbook on Design of Metal Detectors".
The attached block diagram represents signal flow in an EM induction sensing network consisting of: matrix (ground), target in the matrix and sensor having TX coil and RX coil. The diagram is in principle imperfect because it is TWO PORT with only one output signal. To determine the spectral characteristic H(f) of target, we need two signals, shown in diagram as output function Y (f) and input function X (f) in the frequency domain. In the time domain the port functions are y(t) and x(t).
The aim of this article is an initial knowledge:
- What signals delivers now and must deliver the future EMI sensor for RX,
- Analysis of the shortcomings of the shown twoport network,
- Analysis of how to amend the advantages and disadvantages of one special case named "monocoil", when the same coil performs the roles of both TX and RX windings,
- Analysis of advantages and disadvantages of expanding the number of TX coils and/or RX coils, for example GRADIOMETER, Differential sensor TWIN LOOP.
- To draw conclusions and give advice on how should operate EMI sensors designed for hypersensitive and most informatve metal detector.
Since the artcle should look like those in Wikipedia, let's start with
Contents [hide]:
1. Description of the displayed block diagram.
2. Information objective of EMI sensor.
3.
4.
....
Y. See also
Z. External links
I'll start writing the first section in a subsequent posting. Expect comments and suggestions.
If writing and editing of such an article goes well, we will proceed the same way (by collectively writing and editing articles) to design block diagram for GLEANER. Of these articles, we can determine a Wikibook "Textbook on Design of Metal Detectors".
The attached block diagram represents signal flow in an EM induction sensing network consisting of: matrix (ground), target in the matrix and sensor having TX coil and RX coil. The diagram is in principle imperfect because it is TWO PORT with only one output signal. To determine the spectral characteristic H(f) of target, we need two signals, shown in diagram as output function Y (f) and input function X (f) in the frequency domain. In the time domain the port functions are y(t) and x(t).
The aim of this article is an initial knowledge:
- What signals delivers now and must deliver the future EMI sensor for RX,
- Analysis of the shortcomings of the shown twoport network,
- Analysis of how to amend the advantages and disadvantages of one special case named "monocoil", when the same coil performs the roles of both TX and RX windings,
- Analysis of advantages and disadvantages of expanding the number of TX coils and/or RX coils, for example GRADIOMETER, Differential sensor TWIN LOOP.
- To draw conclusions and give advice on how should operate EMI sensors designed for hypersensitive and most informatve metal detector.
Since the artcle should look like those in Wikipedia, let's start with
Contents [hide]:
1. Description of the displayed block diagram.
2. Information objective of EMI sensor.
3.
4.
....
Y. See also
Z. External links
I'll start writing the first section in a subsequent posting. Expect comments and suggestions.
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