Detection object in water

Projects General Guidance
1

Hello guys, i want to detect object in water. For example when laser line touches object in water (not in sea, rock in water cup), i want to get signal like 0 and 1. I don t even need distance. Just want to see when distance have changed, i want to see. How can i do that? My object that i want to detect is not big that much.

2

Hello abceyhun

Welcome to the worldbest Arduino forum ever.

Use a cam simply.

Have a nice day and enjoy coding in C++.

3

Can you recommend cam for me which i can use in my project. Also, I am looking for something cheap

4

Displacement ?
Weight ?
Beam pass-through / obstruction ?

More detail, perhaps photo or diagram ?

5

Oh sorry, distance is under 15 cm,
it will pass through glass which contains hot water
when object like rock touched to the ground, i want to get alert. I want to detect it from outside not inside

6

You can also try to use a light barrier.

1 Like
7

so you have a transparent glass pipe with hot water flowing flowing through it and from time to time a rock can be dragged into the pipe and you want to detect that. Did I get that right?

8

HI,
Is the pipe transparent?
Will the objects you wish to detect cast a shadow, that is are they opaque?

Thanks.. Tom.. :grinning: :+1: :coffee: :australia:

9

I have glass of water. It is transparent. There is a sealing rock. When rock touched the ground, i want to get alert. I can no place anything inside this water.

10

Hi, @abceyhun

Is this a school/college/university project?

What do you mean by "sealing" rock?
I think we have a translation probem.

Can you please tell us your native language?

Do you mean when the rock has fallen to the bottom of the glass.

Thanks... Tom... :grinning: :+1: :coffee: :australia:

11

so you have something like this

image
image3152×1752 334 KB

and you want to detect the last stage, when a rock is at the bottom of the glass?

12

yes exactly, can you also tell me how did u do this animation. Which program or website :smiley: ?

13

Hi, @abceyhun

Can you please tell us your electronics, programming, arduino, hardware experience?

PLEASE answer post #10.

Thanks.. Tom... :grinning: :+1: :coffee: :australia:

14

it's just using keynote (powerpoint like but better — a free app) on my Mac and a couple pictures. No rocket science there :slight_smile:

May be as suggested by @paulpaulson a light barrier if reflexion and refraction are not an issue.

image
image3826×1508 431 KB

1 Like
15

Light sensor at bottom of glass (on outside) Dark =rock

16

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