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Is there any sensor that can detect human skin? Answered

I am working on a project that  involves detection of skin. The sensor should be in such a way that it should differentiate human skin from other objects like wood,plastic,metal.

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What project? You need to be more specific.

yes. that is how a touch lamp works.

For even higher end sensors, check out a product called sawstop. It is a table saw that will stop in 1/1000th of a second to prevent cutting off a finger. It mangles the saw but saves your digit.

Well, no. Both of your examples work with capacitive coupling. You can trigger them by touching the sensor / blade with a piece of metal you hold in your hand.

can you give me any information about capacitive coupling .or any links which could help me understand,

can you be more specific about what you are trying to accomplish in order to get a better answer to your question.

while cutting operation there are serious accidents so inorder to avoid this i need a sensor whichich detects human skin

yaa like that only but any other sensor which can sense skin

0
user
Vyger

2 years ago

Just take a bite, if it screams or hits its probably a person.

I think mobile touchscreen may help you.

You can check that nothing else is sensed by cellphone touchpad except our fingers and other body parts.

Conductive foam tip metal pencils work very well when your old skin fingers are too dehydrated to activate a touchscreen.

I think the simplest way would be to look for body heat with a thermal sensor. Most non human things are hotter or colder then humans - HOWEVER you skin can be cold depending on the place and weather. Indoors you are probably OK. but perhaps combining 2 sensors will be the answer say heat and colour.

That is why reflecting infrared light ( LED ) off blood cell pulsations works giving skin a unique biometric compared to inanimate materials which could be colored to resemble skin.

Skin is transparent to IR. Blood however reflects IR.

Body temperature and hair blocks IR

0
user
iceng

2 years ago

A combination of two or three sensors should do be able to differentiate.

OBJECT------------I_R-------------CONDUCTIVE-------------THERMAL

PLASTIC--------yes_&_no---------USUALLY_NO-----------------NO

METAL--------------NO---------------YES_Strong-------------------NO

SKIN----------------YES--------------YES_weak-------------------YES

------------------------------------------------------------------------------------------------

IR
light passes through skin and reflects off of blood, so reflected
INFRA-RED light can detect heart pulse rate. A pulse rate detector
may be the only sensor needed.

But there are skin areas that have no evident pulsing blood !