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Eric Lenington has no public projects.

Servo Motor Artwork

Project tutorial by Doug Domke

  • 50 respects

Plastic Reflectic

Project showcase by Team Front404

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Project showcase by Natthakit KIMBAB Kang

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Comments 2

  • Liquid Level Sensing Using a Laser ToF Sensor almost 3 years ago

    Sure, it's this TI eval kit:

  • Liquid Level Sensing Using a Laser ToF Sensor almost 3 years ago

    I've been working on various ways to accurately detect liquid in a tank, including the Milone sensor, an external capacitive sensor, a similar ToF sensor, and top-down ultrasonic. For one reason or another, none of these worked well enough for me to feel comfortable with the solution in a production environment. The Milone sensor was too "touchy" (even placing it within a tube as suggested by Milone), as was the capacitive sensor. The top-down ultrasonic sensor wasn't accurate enough and was among the most expensive solutions I tried. I was very hopeful that the ToF sensor would work, as it does really well measuring distance to physical objects, but when I tried to measure the distance to the surface of the water, it wasn't reliable past a few cm. I'm curious if you experienced something similar and what you did to get past that issue. Note that the liquid I'm measuring is a clear liquid, so that could be a factor.

    By the way, my current solution (which works the best of everything I've tried) is bottom-up ultrasonic. This uses a high-frequency (1MHz) piezo transducer "glued" to the bottom outside of the tank, so it measures the distance from the bottom of the container to the surface of the water (rather than top-down sensors that typically use 40KHz frequencies to measure the airspace above the liquid). The advantage to the bottom-up ultrasonic solution is also among the least expensive.

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