Author Topic: anyone knows a distance sensor (steps 0,2mm) with digital protocol interface ?  (Read 267 times)

0 Members and 1 Guest are viewing this topic.

Online Kjelt

  • Super Contributor
  • ***
  • Posts: 4824
  • Country: nl
Hi can someone recommend a distance sensor with the following properties:

- contactless measurement (so ultra sound/light or other means)
- distance 0-30cm
- accuracy 0,2 mm or better
- output: digital protocol , preferred rs485 or something resilient like that.
- price: around $50 not that important

What I found were some ultrasound sensors but they all have an analog output, or programmable binary output for a certain distance.
I can not find one that returns the measured distance over a protocol. I could interface it with a uC myself but rather have it integrated in the sensor.
« Last Edit: August 14, 2018, 06:59:06 pm by Kjelt »
 

Online CM800

  • Frequent Contributor
  • **
  • Posts: 856
  • Country: 00
Hi can someone recommend a distance sensor with the following properties:

- contactless measurement (so ultra sound/light or other means)
- distance 0-30cm
- accuracy 0,2 mm or better
- output: digital protocol , preferred rs485 or something resilient like that.
- price: around $50 not that important

What I found were some ultrasound sensors but they all have an analog output, or programmable binary output for a certain distance.
I can not find one that returns the measured distance over a protocol. I could interface it with a uC myself but rather have it integrated in the sensor.


Are you able to attach something to it? e.g. a suitable reflective surface, optics etc.?

Have a look at these:

https://www.baumer.com/gb/en/product-overview/distance-measurement/optical-distance-sensors-/c/289

« Last Edit: August 14, 2018, 07:13:28 pm by CM800 »
 

Online Kjelt

  • Super Contributor
  • ***
  • Posts: 4824
  • Country: nl
Good question, answer is no  :(
The object is not reflective.
I need to move the object into a certain distance so I have to measure the distance during the move till it is in the right position.
 

Offline StillTrying

  • Super Contributor
  • ***
  • Posts: 1390
  • Country: gb
  • 100% Brand New and High Quality, in theory.
- contactless measurement (so ultra sound/light or other means)
- distance 0-30cm
- accuracy 0,2 mm or better


I'd be surprised if you find anything that can do 0.07%+ accuracy over that distance!

Online AndyC_772

  • Super Contributor
  • ***
  • Posts: 3203
  • Country: gb
  • Will design for cookies
This can be done with a magnetic sensor, though it won't be $50. PM me if you'd like some details.

(Dis)claimer: I designed it.
 
The following users thanked this post: Kjelt

Offline odessa

  • Regular Contributor
  • *
  • Posts: 70
  • Country: gb
Time of flight sensors are pretty accurate and use I2C

Look at the VL53L1, there's an arduino library available for it too
When  I die I want to die peacefully in my sleep like my Grandad ... Not all shouting and screaming like the passengers on his bus.
 
The following users thanked this post: Kjelt

Online Kjelt

  • Super Contributor
  • ***
  • Posts: 4824
  • Country: nl
Time of flight sensors are pretty accurate and use I2C

Look at the VL53L1, there's an arduino library available for it too
Thanks but two issues: starts at 40mm and error is +/-20mm but interesting little thingy for other purposes  :)
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf