How do motion detectors work?
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Imagine you’re playing hide and seek with your friend, and your friend has a flashlight. When they shine the flashlight around, the light bounces off things and comes back to them, helping them find you.
Motion detectors work kind of like that flashlight game. They send out invisible waves (like the light from the flashlight) into a room. If nothing is moving, the waves bounce back just as they were sent out. But if something moves, like a person or a pet, the waves bounce back differently. When the motion detector notices this change, it knows that something is moving and tells the alarm to make a sound or turn on a light. That’s how motion detectors can tell when someone is moving around in a room!
Imagine you’re playing hide and seek with your friend, and your friend has a flashlight. When they shine the flashlight around, the light bounces off things and comes back to them, helping them find you.
Motion detectors work kind of like that flashlight game. They send out invisible waves (like the light from the flashlight) into a room. If nothing is moving, the waves bounce back just as they were sent out. But if something moves, like a person or a pet, the waves bounce back differently. When the motion detector notices this change, it knows that something is moving and tells the alarm to make a sound or turn on a light. That’s how motion detectors can tell when someone is moving around in a room!
Imagine you’re playing hide and seek with your friend, and your friend has a flashlight. When they shine the flashlight around, the light bounces off things and comes back to them, helping them find you.
Motion detectors work kind of like that flashlight game. They send out invisible waves (like the light from the flashlight) into a room. If nothing is moving, the waves bounce back just as they were sent out. But if something moves, like a person or a pet, the waves bounce back differently. When the motion detector notices this change, it knows that something is moving and tells the alarm to make a sound or turn on a light. That’s how motion detectors can tell when someone is moving around in a room!
In the most simple of ways, it can just be a crude camera sensor that looks at each frame it captures and compares the difference. If there has been no significant difference between frames, then it can be assumed that nothing is moving. If there is significant change, then something is moving.
In the most simple of ways, it can just be a crude camera sensor that looks at each frame it captures and compares the difference. If there has been no significant difference between frames, then it can be assumed that nothing is moving. If there is significant change, then something is moving.
In the most simple of ways, it can just be a crude camera sensor that looks at each frame it captures and compares the difference. If there has been no significant difference between frames, then it can be assumed that nothing is moving. If there is significant change, then something is moving.
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