Pratique du Shadowing: Types of Proximity Sensors! #automation #engineering #science #robotics #electronics - Apprendre l'anglais à l'oral avec la vidéo
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In automation, detecting part presence is pretty important, and this is most commonly done with proximity sensors.
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Even within this part category, there are some important distinctions you should know about.
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Firstly, because they use invisible light beams and they're sweet, let's talk about infrared sensors.
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I've got two different types here.
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This all-in-one style is a diffuse-style sensor, which emits the infrared light and looks for it bouncing back all in the same little tube.
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Super easy to use and mount.
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Downside is it can be less accurate in outdoor environments or with shiny and dark parts.
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The other form of infrared sensor is a through beam sensor, and these are usually two pieces, with the emitter on one side of your conveyor or detection zone, and a receiver on the other.
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They're a little more complicated to set up than the single unit, but much more reliable too.
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These little fellas are inductive sensors, meaning they can only see metal or things that have inductive current.
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You can run cardboard or plastic by these without detecting anything, because they're only useful for detecting metal.
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Lastly, the capacitive style sensors can see a lot more and even be used to detect powders or liquids, with the trade-off being they can actually be too sensitive
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and often need their sensitivity dialed back down a bit with a potentiometer to reduce noise.
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One more pro gamer tip, pretty much all of these sensors can be found in PNP or NPN arrangement.
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You can either source 24 volts to your PLC with a PNP sensor
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or sync back to 0 volts with an NPN sensor.
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Most digital input cards on a PLC can only handle one or the other.
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Make sure you buy a sensor to match your card.
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So which one of these sensors do you think is the right call for detecting components on our conveyor system?
À propos de cette leçon
Vous vous entraînez en anglais avec "Types of Proximity Sensors! #automation #engineering #science #robotics #electronics" en utilisant la technique du Shadowing.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.