Hello, i have been looking for a type of sensor which could detect the presence of a thin nylon rope (relatively invisible and has diameter about 1mm) which is moving on a production line. The sensor just needed to detect the presence/absence of the rope as it then would send notification if the rope is missing or a disconnection has occured.
I would suspect the TCRT5000 to detect the line as it is relatively okay to detect thin modules. My suspect is that the thin line wouldn't be able to detect since the nylon is relatively small, and there will be about 50 nylons in parallel, as each of the ir sensor would be a bit close to each other.
Or maybe an IR heat thermal since the temperature would be relatively hot to be detected by such a small thermal sensor, But i don't know if such a thermal sensor exists.
Otherwise i would consider the usage of a piezo sensor as the thin nylon rope is allowed to contract, however, the breakdown of the piezo sensor would be relatively fast as the nylon has to contract with the piezo sensors for 24 Hours. And therefore i would like to know the strength of the piezo sensor
I would suspect the TCRT5000 to detect the line as it is relatively okay to detect thin modules. My suspect is that the thin line wouldn't be able to detect since the nylon is relatively small, and there will be about 50 nylons in parallel, as each of the ir sensor would be a bit close to each other.
With 50 strands CV is the only sensible optical technology as it scales easily - proper lighting to make them clearly resolved on the image would be required (side lit with black background).
Or maybe an IR heat thermal since the temperature would be relatively hot to be detected by such a small thermal sensor, But i don't know if such a thermal sensor exists.
unlikely, expensive x 50 = extremely expensive.
Otherwise i would consider the usage of a piezo sensor as the thin nylon rope is allowed to contract, however, the breakdown of the piezo sensor would be relatively fast as the nylon has to contract with the piezo sensors for 24 Hours. And therefore i would like to know the strength of the piezo sensor
Thank you for your help and kindness.
For mechanical sensing of lots of strands an array of microswitches with guide-pulleys at the business end might be the cheapest, these are standard components available with a huge range of lever hardware. Stainless steel pulley-bearing would be ideal for long life.
You haven't said what the spacing is, or if the position is accurately maintained (needed for aligning 50 pulleys!).
