Sensor for Human detection

[rabhishek91]

Hi everyone.

My latest project includes detecting whether the person is seated or not(in automobiles). This can be done by using a pressure sensor or just by a micro switch.

Suppose i'll keep something heavy on the seat. Then the sensor detects it as a true condition and gives the output. But actually no one(Human being) is seated .
As a solution to this problem i need to detect the presence of human along with the weight .

This can be done by using image processing methods but i don't want to complicate my project . Is there any other sensor or a way which would help me in detecting the presence of human?

 

[Rleo6965]

You can use proximity sensors.

 

[rabhishek91]

You can use proximity sensors.

Thanks for your reply sir.
Proximity sensors detects the presence of near by objects without physical contact. It detects both living and non-living things. So how can that be used to differentiate Humans from a object.
What's your opinion about it sir ?

 

[cjdelphi]

Maybe an infrared sensor? to determine if the body is giving off some kind of heat source? might be useless on a hot day though lol, then you'd need to look for a cooler heat source.

 

[(*steve*)]

Maybe a methane sensor under the seat?

 

[rabhishek91]

Maybe an infrared sensor? to determine if the body is giving off some kind of heat source? might be useless on a hot day though lol, then you'd need to look for a cooler heat source.

Thanks for your reply.
Yes sir. That's a good option but again it won't work in hot day.
Anyway i'll go through it once.

 

[alfa88]

An IR LED and detector looking for an obstruction(legs).

 

[rabhishek91]

Maybe a methane sensor under the seat?

Thanks for your suggestion sir .
Could you elaborate how methane sensor will be useful in detecting the human?
I googled about methane sensor , i didn't get much information about it. Please help.

 

[rabhishek91]

An IR LED and detector looking for an obstruction(legs).

Yes sir. This might work but where to place the sensor?
I have attached the sketch . Would you suggest me the best position?

 

[alfa88]

Position1 looks good to me. you might need several to account for taller/shorter people.

 

[rabhishek91]

Position1 looks good to me. you might need several to account for taller/shorter people.

Thank you sir. I too think position 1 is the best one.
It's impossible to place a sensor on a gear box so i think its better if it is placed in the door(Exact opposite to position 1).
Yes. i need to place at-least 3 sensors in a line cause i need to detect occupants irrespective of their age (It may be a child or an adult).

 

[alfa88]

Oh, and I think Steve was referring to a paad detector.

 

[rabhishek91]

Oh, and I think Steve was referring to a paad detector.

Sir can you throw some light on PAAD detector ?

 

[alfa88]

Flatsulence?

 

[rabhishek91]

Flatsulence?

Sir i don't think it works. (There may be lot of reasons).
Thanks a ton sir. I'll go with your advice