RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

All topics around external tire management systems (TPMS, TTMS, TMS)
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rbono459890
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rbono459890 »

This is excellent work Magnus!

I am working on a simpler/less expensive version for motorcycles using a single read (not a matrix) device such as MLX90614.

How did you manage to compensate readings for distance?
The MLX90614 sensor has a wide aperture and reliable readings require close proximity in the few centimeters range (while I was hoping to mount the sensor no closer than 10cm).
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Magnus Thomé
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by Magnus Thomé »

Hi!

The MLX90621 doesn't need compensation for distance.

But it would be very easy to use the distance data from the VL53L0X to add that if the MLX90621 was made to use distance compensation.
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rbono459890
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rbono459890 »

So rather than "compensation for distance", after some more testing it looks like the issue is related only to the MLX90614 sensor aperture: being quite wide, it detects an average temperature, which works for large surfaces but in the case of motorcycle tires it does not.

I am looking at mounting the sensor as close as possible (like some commercial solutions do) but it's at this point much more complicated, especially with the front tire.

Thanks for the tip and inspiration!
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