hello everyone 
I want to calculate the turn number of the vehicle tire
What kind of sensor should I use ?
It is possible to do this with the laser sensor or optic sensor
I want to take pulse as in the picture
it can be possible or not... why ?
but operating distance is not enough, ı want to take pulse 10-15 cm away....cost of sensor is not important...can you suggest me anoter sensor for this purpose
no access to the axle, driveshaft, transmission, or motor output shaft rather than the wheel itself? then you would be close and use something like a hall sensor with a magnet.
You posted on 1/28/2016 about the same thing. A year and you still haven't figured it out.
If you would have looked at the tutorial that was linked to, you would have seen a link to some sensors with more range.
If you can't put a little effort into your research, don't expect to get a lot of help.
groundFungus:
I have used reflective optical sensors like the QRD-1113 for that purpose.
Operation distance of QRD is 1cm ....it is not enought for my project...ı need 10-20 cm
First asked in Dec '15.
In Jan '16 new thread mentioning this was part of your graduation project.
Third thread in Jan '17.
Half year later, asking again.
How much time do you even have to get your graduation done? Getting really curious now. 1 1/2 years in and this issue is still pending. Doesn't seem to be too important for your graduation, or is it?
Anyway back to the project. What is the purpose, what have you tried, what worked/didn't work, what options do you have in mind to do this? What are the limitations that stop you from getting closer? If using a reflective thing, and assuming this tyre is going to be used on a vehicle, how're you planning to keep it reflective?
wvmarle:
First asked in Dec '15.
In Jan '16 new thread mentioning this was part of your graduation project.
Third thread in Jan '17.
Half year later, asking again.
How much time do you even have to get your graduation done? Getting really curious now. 1 1/2 years in and this issue is still pending. Doesn't seem to be too important for your graduation, or is it?Anyway back to the project. What is the purpose, what have you tried, what worked/didn't work, what options do you have in mind to do this? What are the limitations that stop you from getting closer? If using a reflective thing, and assuming this tyre is going to be used on a vehicle, how're you planning to keep it reflective?
ı will draw a vehicle tire with a white pen (approximate thickness of the pen 2 - 4mm) and then ı will measure the speed of the vehicle
Can I use the Sharp GP2Y0A02YK0F sensor ?
wvmarle:
First asked in Dec '15.
In Jan '16 new thread mentioning this was part of your graduation project.
Third thread in Jan '17.
Half year later, asking again.
How much time do you even have to get your graduation done? Getting really curious now. 1 1/2 years in and this issue is still pending. Doesn't seem to be too important for your graduation, or is it?Anyway back to the project. What is the purpose, what have you tried, what worked/didn't work, what options do you have in mind to do this? What are the limitations that stop you from getting closer? If using a reflective thing, and assuming this tyre is going to be used on a vehicle, how're you planning to keep it reflective?
I was fighting a deadly disease ... so I had to take a break to my project
ı will draw a vehicle tire with a white pen (approximate thickness of the pen 2 - 4mm) and then ı will measure the speed of the vehicle
That adds no useful information. We can see that in your original post. People have asked of you several questions, it is impolite to ignore them.
groundFungus:
That adds no useful information. We can see that in your original post. People have asked of you several questions, it is impolite to ignore them.
could you tell me which question I had ignored ? all question importent for me .....I do not want to learn everything from you because that is my homework
Reply #6.
Something cheap to try:
https://de.aliexpress.com/item/JFBL-2X-1-pcs-Infrared-Reflection-Photocell-Switch-IR-Cut-Line-Tracking-Sensor/32734560249.html?spm=2114.47010608.4.153.fwuLtv
mdirier:
Can I use the Sharp GP2Y0A02YK0F sensor ?
OK, the photo gives some clues. This is for a full-size car, right? Driving on public roads? Day and night? But GPS is so easy - is there some reason you don't want to use GPS? If you're measuring wheel slip then this may be one reason for measuring the tire and not some other component of the drive train?
No, you can't use that sensor. That's a distance sensor, not a bright/dark sensor.
The 10-15cm distance seems to indicate that you're mounting the sensor in the wheel well to look at the side (outside??!!) of the tire. You know real cars have suspension and the white mark on the tire won't always go past the same point? That idea seems impossible to me. We need more information on what you think you want to measure.