How to make a thickness gauge?

Question

Arduino

how to make a thickness gauge for arduino (or ready-made options) with a measurement accuracy of up to 0.01 mm?

Answer 1

Thickness of what? a human hair, or a mantle of the earth?

Answer 2

dolina-s.ru/blog/page/izmeritel-tolshhiny-lkp-na-a... Like
this for example.
Another option is servo shield + stuffing from dvd
The idea is this. The needle first goes to contact with the site, when there is a touch, it is reset to zero.
Then put the sample, conductive or just cover with foil.
Your logic counts the unfinished revolutions before touching.
let the screw have a pitch of 1 mm and 180 pitches per turn.
0.0056 mm per step.

Answer 3

Very little information. What kind of thread, what are its physical properties, what is the range of measured values, are we measuring in motion or at rest? And of course, what does Google say about measuring the thickness of such threads? Before us, a lot of things have already been invented.
Depending on all this, the methods will be completely different. From close to hobby, for example, 3D printers have filament thickness sensors. And for some sewing threads, something else is needed. While the task is too abstract.

Answer 4

Take a Chinese micrometer. Understand how the sensor is made there.
Alternatively, you can make an optical system - a light source, a lens, a camera. Then some sort of Sobel filter, for example, measuring the width of the projection.
Alternatively, the thickness can be measured using a lever and a mirror .

Answer 5

From the point of view of "Arduina" - you need a READY sensor and the microcontroller will simply process the result.
If the task is to make a sensor, then the question should be moved to the "Electronics" section.
From experience I can say that buying a ready-made sensor is CHEAPER.