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Hi folks,
Some questions on possible detector array arrangements.
I am gong to start building my towed array assembly, and I want to make sure I'm going down the right path before I start.
Currently, I was planning to build 6 pulse detectors with separate mono coils. These coils would be placed next to each other in a staggered pattern like so:
-O O O
--O O O
To give me a scan coverage that overlaps.
I was going to enable each PI circuit for perhaps 100ms, disable, and move on to the next circuit and repeat. Each circuit would provide a separate detection output that I would read for intensity, i.e depth.
Since I will be moving slowly, I would "scan" as I'm going, and not have the circuits interfere with each other, and allow each coil to be tuned to that particular circuit.
I want to make sure this seems reasonable, or if anyone can point out any potential issues I might have. I know I would basically only get an all-metal scan, with perhaps only the ability to detect depth.
I would really also like the ability to discriminate as well, which I cant really do with Pulse Induction. If I used something besides PI, such as VLF, which can discriminate, would I be able to sequence the circuits like the pulse? Or would turning the VLF circuits on and off like that not be stable? To turn off the PI circuit I will simply clamp the reset pin on the 555 which will disable the transmit and subsequent sampling. Would I be able to do something similar with a VLF setup?
What would be a good VLF design to do something like this? I am intending to initially use 6 Surf PI boards. If that works, I will start customizing a board design around that design as the base.
Any ideas?
Some questions on possible detector array arrangements.
I am gong to start building my towed array assembly, and I want to make sure I'm going down the right path before I start.
Currently, I was planning to build 6 pulse detectors with separate mono coils. These coils would be placed next to each other in a staggered pattern like so:
-O O O
--O O O
To give me a scan coverage that overlaps.
I was going to enable each PI circuit for perhaps 100ms, disable, and move on to the next circuit and repeat. Each circuit would provide a separate detection output that I would read for intensity, i.e depth.
Since I will be moving slowly, I would "scan" as I'm going, and not have the circuits interfere with each other, and allow each coil to be tuned to that particular circuit.
I want to make sure this seems reasonable, or if anyone can point out any potential issues I might have. I know I would basically only get an all-metal scan, with perhaps only the ability to detect depth.
I would really also like the ability to discriminate as well, which I cant really do with Pulse Induction. If I used something besides PI, such as VLF, which can discriminate, would I be able to sequence the circuits like the pulse? Or would turning the VLF circuits on and off like that not be stable? To turn off the PI circuit I will simply clamp the reset pin on the 555 which will disable the transmit and subsequent sampling. Would I be able to do something similar with a VLF setup?
What would be a good VLF design to do something like this? I am intending to initially use 6 Surf PI boards. If that works, I will start customizing a board design around that design as the base.
Any ideas?
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