Looking for sensor that detects fast movement

[m229]

sensing fast movement

Hi all;
i want a sensor that detect fast movement. i want a beam that move in a straight line.
thanks

 

[Basil]

sensing fast movement

fast movement of what?, light, body, magnetic, para magnetic, dielectric, hot, cold,

how fast?

 

[m229]

Re: sensing fast movement

dear Basil;
fast movement of body. and when the peron is running.
thanks
m229

 

[Basil]

Re: sensing fast movement

dear Basil;
fast movement of body. and when the peron is running.
thanks
m229

you can use a pyroelectric detector to detect fast human body movements

see these links

• **broken link removed**
• ... The motion tracking system discussed in this paper, localizes the source ... Pyroelectric detector as sensing element A single element pyroelectric detector is ...
• **broken link removed**
• **broken link removed**
• :arrow: ... more stuff here

 

[cesardelahoz]

Re: sensing fast movement

why don't you try ultrasound , you can find some examples doing a google search

 

[Nicholas]

Re: sensing fast movement

try PIR application.
It can detect human movement of about 0.5m/s up to 7m/s from more than 10 meters away.

 

[m229]

Re: sensing fast movement

hi everybody;
i don't want this type of sensors.
for example suppose that we have a straight line and when a body cut this line then we detect him/her. for example in running race, when every body pass the end line we recognize and we have the time of passing. and it is important for me that this beam is very thin.
because if the beam is not thin then the time of passing of body or other thing is not exact.
i want to extract the exact time. (up to 5 meters)
sincerely u'rs
m229

 

[Basil]

Re: sensing fast movement

i don't want this type of sensors.
for example suppose that we have a straight line and when a body cut this line then we detect him/her. for example in running race, when every body pass the end line we recognize and we have the time of passing. and it is important for me that this beam is very thin.
because if the beam is not thin then the time of passing the body or other thing is not exact.
sincerely u'rs
m229

Hi,

first and foremost I´m not a specialist (so use " " to read me), however I think you need focousing or collimation, i.e. some kind of optics, to get a narrow beam. That´s all.

You also can use a reflective surface on the other side of the raceway: the ligth bean must be interrupted to have a signal. This is very narrow.

I think You could increase the time resolution taking the derivate of your signal.