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Will
 Will
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Posted by: @wamagee
Posted by: @will

If the waterproof HC-SR04 sensors won't work in the 4" tube, you could try drilling small hole in each of the tank caps and mounting a sensor in each. The wires could be trailed over to the control system and the capacitive sensors could be installed on the 4" tube (if it's still worth installing).

The HC-SR04 sensors are not waterproof so I am assuming that you are talking about Waterproof sensors that were demoed by bill a week or so ago. Correct me if I am wrong.

No, that's correct, that's why I qualified it with "waterproof" HC-sR04 (I'm just too lazy to go back and replay the video to get the correct identification of it 🙂

The particular Waterproof sensor I am looking at has a very long minimum distance. So if used inside the lid will force us to keep maximum water levels much lower. Possibly 12+" 30.5 cm. There is another waterproof sensor Bill demoed that might have a shorter minimum distance, but significantly more expensive.  We'll see!

Could you fit a foot long section of the 6" pipe over the top openings and mount the sensor on top of that ? That'd lift it up away from the water without limiting the tank capacity unnecessarily.


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WAMagee
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Posted by: @will

Could you fit a foot long section of the 6" pipe over the top openings and mount the sensor on top of that ? That'd lift it up away from the water without limiting the tank capacity unnecessarily.

Interesting thought. And I am now scratching my head trying to figure out a way to test it.  But first I am going to see if they work in the 4" Measurement Stack.

 

First thought is would returning sound waves find their way back up the 6" pipe?

 

Return Sound Waves Hitting Top Of Tank

 


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Will
 Will
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Posted by: @wamagee
Posted by: @will

Could you fit a foot long section of the 6" pipe over the top openings and mount the sensor on top of that ? That'd lift it up away from the water without limiting the tank capacity unnecessarily.

Interesting thought. And I am now scratching my head trying to figure out a way to test it.  But first I am going to see if they work in the 4" Measurement Stack.

Yes, the 4" pipe would still be best

 First thought is would returning sound waves find their way back up the 6" pipe?

I believe they should. The sound would exit the tube downwards towards the water and start to curve out from the bottom of the tube (moving equal distance in the same time would cause the ones moving straighter out of the tube to get farther down towards the water than the sound spreading out to the side).

That wave would then bounce off the water surface and form another curved wave heading back upwards towards the bottom of the pipe. Once inside it'd be a much smaller front but the wave would be forced back up towards the receiver.


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Will
 Will
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Posted by: @wamagee
Posted by: @will

Could you fit a foot long section of the 6" pipe over the top openings and mount the sensor on top of that ? That'd lift it up away from the water without limiting the tank capacity unnecessarily.

Interesting thought. And I am now scratching my head trying to figure out a way to test it. 

Just cut a piece of the 4" pipe cut to about the same length as the minimum distance for the sensor. Clamp it pointing vertical about 46" off the floor, put one of the HC-Sr04s on the top and take measurements through the pipe.

If the 4" tube work, the 6" should work better (larger area for return signal). You can slide cardboard boxes of different sizes (possibly stacked) under the assembly to simulate different water levels.

If that works then you can be reasonably certain that the 6" pipe will also allow enough sound back through the pipe to work.


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WAMagee
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Posted by: @will

Just cut a piece of the 4" pipe cut to about the same length as the minimum distance for the sensor. Clamp it pointing vertical about 46" off the floor, put one of the HC-Sr04s on the top and take measurements through the pipe.

If the 4" tube work, the 6" should work better (larger area for return signal). You can slide cardboard boxes of different sizes (possibly stacked) under the assembly to simulate different water levels.

If that works then you can be reasonably certain that the 6" pipe will also allow enough sound back through the pipe to work.

Thx a bunch for all the thoughts. Once I receive the JSN-SR04T (Waterproof Ultrasonic) I will be doing some testing and as one test unfolds its data the next steps will be thought through. Goal is to get "Measuring Stack" set up in garage and actually start developing the code to deliver reasonably accurate water level measurements to the tank water loading system. These accurate water level measurements are critical.

Between now and when I get the JSN-SR04T (Waterproof Ultrasonic) there is not a lot to do since how I go forward will depend on decisions based on testing. For sure will share all results as they unfold.


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Will
 Will
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@wamagee 

OK, I'm going to unsubscribe from this thread now and wait for the parts to start arriving and for testing to begin.

I'm not qualified to handle the tech specs on pumps and valves like @byron is, so I doubt if I can add any meaningful input to that aspect of your research.

Please let me know if anything interesting or problematical or anything like that (outside of the previous discussions) shows up.

I don't imagine you'll have any problems with programming 🙂


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WAMagee
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Posted by: @will

Please let me know if anything interesting or problematical or anything like that (outside of the previous discussions) shows up.

@will For sure and when I get some testing results on the sensors I will reference you.  And a big thanks for all your input so far, it has been invaluable!


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byron
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Posted by: @will

I'm not qualified to handle the tech specs on pumps and valves like @byron is

Whoa up lad, you elevate me above my station.  I've just a general DIY knowledge of those things.  But indeed the next instalment will be the test results concerning the sensors @wamagee will be undertaking.

And @wamagee, I hope the LIDAR sensor you've got will also have quick test as well as the waterproof ultrasonic sensors.  

Do let us know how this turns out.  


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Will
 Will
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Posted by: @byron
Posted by: @will

I'm not qualified to handle the tech specs on pumps and valves like @byron is

Whoa up lad, you elevate me above my station.  I've just a general DIY knowledge of those things.

Well, thats a huge jump up from my position not even being able to distinguish between pictures of them, let alone use them 🙂


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WAMagee
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You both underestimate yourselves, huge underestimate!
 
Posted by: @byron

Whoa up lad, you elevate me above my station.  I've just a general DIY knowledge of those things.  But indeed the next instalment will be the test results concerning the sensors

Posted by: @will

Well, thats a huge jump up from my position not even being able to distinguish between pictures of them, let alone use them

 

 

 


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Will
 Will
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@wamagee 

Don't confuse ability to tinker with theory/code and ability to tinker with hardware 🙂


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byron
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Posted by: @will

@wamagee 

Don't confuse ability to tinker with theory/code and ability to tinker with hardware 🙂

No no, don't 'tinker' with hardware..?   just hit it with a bloody big hammer! 


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WAMagee
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HELP!
Posted by: @byron

FYI @will

And @wamagee, I hope the LIDAR sensor you've got will also have quick test as well as the waterproof ultrasonic sensors.

 

Look at Pic!

LiDAR Connection Issue

 


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Will
 Will
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Posted by: @byron

No no, don't 'tinker' with hardware..?   just hit it with a bloody big hammer! 

Ah yes, the "universal adapter" 🙂


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Will
 Will
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Posted by: @wamagee
HELP!

Look at Pic!

LiDAR Connection Issue

 

My first thought was - does it unplug at the top and, if so, is that a more standard plug ?


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