Comparison between PI devices and opinion poll on the results

[surf-tech]

Hello
I would like to carry out a study to compare the device projects in this forum which are manufactured by amateurs and the results in the field. By knowing the members’ experiences about each device that was manufactured and taking notes, it is possible to know the advantages and disadvantages of each device. Then it will be easy ways to develop a device or participate in a new device project....It may be useful in one way or another for everyone.
The idea is still incomplete, and I need your opinions and suggestions so that the program is based on accurate scientific foundations...I am thinking of creating a set of tables containing the names of the devices divided into columns according to a set of technical and characteristics.
Are there any opinions and suggestions?

[bbsailor]

Hello
I would like to carry out a study to compare the device projects in this forum which are manufactured by amateurs and the results in the field. By knowing the members’ experiences about each device that was manufactured and taking notes, it is possible to know the advantages and disadvantages of each device. Then it will be easy ways to develop a device or participate in a new device project....It may be useful in one way or another for everyone.
The idea is still incomplete, and I need your opinions and suggestions so that the program is based on accurate scientific foundations...I am thinking of creating a set of tables containing the names of the devices divided into columns according to a set of technical and characteristics.
Are there any opinions and suggestions?

Surf-tech

Go to the Projects section. Scroll down to Project Competition. Then go to Competition by ivconic. Read this section to see issues discussed that are closely related to your proposal.

Once you read it, let us know how it compares to what you propose.

Thanks

Joseph J. Rogowski

[surf-tech]

Surf-tech

Go to the Projects section. Scroll down to Project Competition. Then go to Competition by ivconic. Read this section to see issues discussed that are closely related to your proposal.

Once you read it, let us know how it compares to what you propose.

Thanks

Joseph J. Rogowski

ok... thank you

[surf-tech]

I wanted to see the members' contributions here and their interaction for more information and a reminder of some projects that have been forgotten or to study some of the technical features of one of them. Or even evaluating the idea in general, I don’t know. Perhaps the topic is not very useful or that taking is more than giving..... Perhaps we will find a different starting point in order to think about a new project or benefit from what was previously published with some new information and advice that will only come After the experience

[bbsailor]

I wanted to see the members' contributions here and their interaction for more information and a reminder of some projects that have been forgotten or to study some of the technical features of one of them. Or even evaluating the idea in general, I don’t know. Perhaps the topic is not very useful or that taking is more than giving..... Perhaps we will find a different starting point in order to think about a new project or benefit from what was previously published with some new information and advice that will only come After the experience

Surf-tech

When comparing different metal detector designs, you need to minimize the technical variables so the results can be better compared. Here are some ways to approach this concept.

1. standard target sizes, time constants and orientations relative to a horizontal coil.
2. standard coil sizes and styles for each standard target size and time constant.
3. standard TX frequency range and integration levels and TX to RX delays.
4. standard test environment, indoor, outdoor, beach dry or wet, rocky streams, soil.
5. standard pulse induction detector style of design

Here is an example of what I found very good to use on NJ barrier island beaches, both wet and dry looking for coins. I used 15 inch diameter mono PI coil to cover more ground with each sweep than using a smaller coil. I found coins about 12 inches deep in both wet and dry sand. Rings were also an occasional found target.

My coin recovery method was this.
1. Long shaft shovel to dig targets.
2. One half inch wire mesh basket constructed like this.
a. Use a flexible pipe to make a 12 inch OD loop.
b. Cut wire mesh 15 inches tall by 38.5 inches long.
c. Cut the top 3 inches of alternate horizontal wire mesh to make the top 3 inches look like ladders so they can be easily bent over the top 12 inch pipe and secured by bending the top of the ladder around the wire mesh just below the pipe.
d. Cut a round circle of mesh about 13.5 inches in diameter. Make the outer edge of the outside circumference have fingers to secure to make the bottom of the basket.
3. Put a thin rope across the top of the basket and a long 4 to 6 foot rope.
4. Tie a 4 to 6 foot length of rope with a hook on the end. Secure the hook to a belt or a thick rope around your waist. This will allow you to drag the basket while detecting hand free or detach the basket to leave it in a hot spot to fill with targets from the shovel. You can shake the basket to get the sand out or place in where the ocean water sweeps up on the beach to get the sand out. Just secure the end of the rope to a wood stake in the sand to prevent the basket from being sucked into the ocean.

The wire mesh size chosen will not let the smallest US coin, a dime, slip through the mesh opening on the diagonal. This basket allows a very fast and efficient way to beach hunt for coins.

Joseph J. Rogowski

[surf-tech]

Surf-tech

When comparing different metal detector designs, you need to minimize the technical variables so the results can be better compared. Here are some ways to approach this concept.

1. standard target sizes, time constants and orientations relative to a horizontal coil.
2. standard coil sizes and styles for each standard target size and time constant.
3. standard TX frequency range and integration levels and TX to RX delays.
4. standard test environment, indoor, outdoor, beach dry or wet, rocky streams, soil.
5. standard pulse induction detector style of design

Here is an example of what I found very good to use on NJ barrier island beaches, both wet and dry looking for coins. I used 15 inch diameter mono PI coil to cover more ground with each sweep than using a smaller coil. I found coins about 12 inches deep in both wet and dry sand. Rings were also an occasional found target.

My coin recovery method was this.
1. Long shaft shovel to dig targets.
2. One half inch wire mesh basket constructed like this.
a. Use a flexible pipe to make a 12 inch OD loop.
b. Cut wire mesh 15 inches tall by 38.5 inches long.
c. Cut the top 3 inches of alternate horizontal wire mesh to make the top 3 inches look like ladders so they can be easily bent over the top 12 inch pipe and secured by bending the top of the ladder around the wire mesh just below the pipe.
d. Cut a round circle of mesh about 13.5 inches in diameter. Make the outer edge of the outside circumference have fingers to secure to make the bottom of the basket.
3. Put a thin rope across the top of the basket and a long 4 to 6 foot rope.
4. Tie a 4 to 6 foot length of rope with a hook on the end. Secure the hook to a belt or a thick rope around your waist. This will allow you to drag the basket while detecting hand free or detach the basket to leave it in a hot spot to fill with targets from the shovel. You can shake the basket to get the sand out or place in where the ocean water sweeps up on the beach to get the sand out. Just secure the end of the rope to a wood stake in the sand to prevent the basket from being sucked into the ocean.

The wire mesh size chosen will not let the smallest US coin, a dime, slip through the mesh opening on the diagonal. This basket allows a very fast and efficient way to beach hunt for coins.

Joseph J. Rogowski

Thank you Mr Joseph J. Rogowski for your wonderful contribution... Yes, this is what I mean, but I wanted it to be a collective idea to start with a program that we agree on and benefit from...We will see if someone else participates with us with a proposal, setting standard conditions, or dividing devices into groups with common or similar characteristics.

[surf-tech]

This is a message to everyone who has experience in the industry or experiences in the field... We invite you to share your opinion and experience. For the idea to be useful to everyone, initially I put this table as a preliminary example... but I expect that there are things that must be added or corrected.
The answers are to different tests
1 test in air
2 Ordinary soil
3 Mineralized or highly mineralized soil
4 Test in nature with different terrain
We know that not everyone can do all of these tests, but at least try one
Conclusion: He mentions the type of experiment and then records the results as in the table
Another thing remains to divide the devices into groups or set technical conditions for each group...what do you think?

[surf-tech]

like this

[Carl-NC]

I don't think you will ever get any meaningful results.

[surf-tech]

I don't think you will ever get any meaningful results.

hi Mr Carl ok. I will abandon him...I hope to present the best in future articles

[cristiano.sar]

Not exactly about this, by I created a website (https://metaldetectingfinds.com) where people can add their finds and information related to them, like the detector used, soil type, depth, type of object. The plan is to collect data so in the future it could be used for comparisons like that. You can check a little demo here:

For now the only item registered is my little slag I have found with a Felezjoo PI

[surf-tech]

Not exactly about this, by I created a website (https://metaldetectingfinds.com) where people can add their finds and information related to them, like the detector used, soil type, depth, type of object. The plan is to collect data so in the future it could be used for comparisons like that. You can check a little demo here:

For now the only item registered is my little slag I have found with a Felezjoo PI

Good job, I wish you success....On the contrary, there is no significant difference because the goal is to collect more accurate information and data in the post-manufacturing stage.One thing I was thinking about is comparing the results to the technical differences

[surf-tech]

The manufacturing stage is part of a long period of dealing with the metal detector, and after this period may be the most important