I am a student and I am working on a project where I want to use a motion sensor to detect hand mouvements.
Everytime a person takes a piece from an open-front bin, I should get that information to be sent later to an app.
I'll be grateful if someone could help me to choose the right sensor. I thought of PIR sensor but it doesn't give a precise information since the angle of detection is too large. It means that one can just move his hand and trigger that sensor.
The most common is HC-SR501 PIR motion sensor. The Effective angle is < 120°. If you need something better, you may consider Microwave Radar motion sensor instead.
Yes sure. It's one of these bins we could find in assembly manufacturing. It's mostly a workplace where I aim to add some sensors. I attached the type of bins I am talking about.
This kind of sensors with that angle could be triggerd just by waving hand accidentally. I experimented that. I want a sensor with more precision regardless if it's an industrial sensor or a "micro" sensor we use with a microcontroller...
Yes maybe infrared sensors. They are used in automatic taps. But my choice would be based on what exactly. Is there a type of these sensors I could use?
PIR sensors have a translucent plastic lens. if you inspect the inside of that lens you will see that they are multifaceted, like a flies eye. if you move your hand near them in any direction the lens sees a series of pulses from the multiple lenses, and that is why they operate through a wide angle.
if you remove the lens you get a spot sensor, versus a wide angle sensor. try using the cheapest three wire no adjustment sensor without a lens, pointed down towards the middle of the opening.
