hi everyone. basically i'm taking this AS level in engineering and we have to deisng and make something with a function that will help people in everyday life etc etc that hasn't already been done or is a significant adaption of something that has been done.
i've been given this idea by a signal engineer to do a detection circuit for level crossings to detect anyone that gets trapped inside. i'm thinking of using PIR emittors and sensors for this and i'm only making a small model out of MDF or similar (this will be like a rectangular cuboid shape except with 2 sides instead of 4 but obviously still with a top and bottom, and the circuit will go between the top and bottom and i'll just draw a traintrack on the top part)
basically there are two outcomes which are represented by two sets of lights. the first is for the operator of that level crossing and that will consist of a green LED for 'crossing clear' and red for 'crossing obstructed'
the second is for the train driver, red so the driver knows to start braking the train, yellow to say 'crossing clear but proceed with caution' and green for just 'carry on as normal'
i'd like to put a scan of this flowchart i made pointing out the whole system but for some reason i can't paste images in here and i have to type a URL in?
anywho, basically first the sensors are activated.
if they detect something - 'crossing obstructed' light is lit and so is the RED light for the train driver
if not - GREEN light (or crossing clear for operator) for both operator and train driver
sensors are activated again
if the detect something 1st AND 2nd time (or just 2nd time)- 'crossing obstructed' for operator and RED for train driver
if they detected something 1st time but NOT 2nd time - 'crossing clear' for operator, YELLOW for train driver (approach with caution)
if nothing both times - remains GREEN for both
this is obviously much better illustrated with a flow chart, but i hope you all understood this! of course don't hesitate to ask questions (provided i can answer them!)
the trouble is i'm not very familiar at all with circuits and so i don't know how to go about constructing one for this, or what components to use, or even how to read other circuits (ie look at one and actually know what it does) so can anyone help me to tell me what i need or what the kind of circuit i'm trying to make will look like?
i'm afraid if anyone can help they'll need to explain in really simple terms because otherwise i really won't understand!
hope it wasn't too long a read....thanks if you can help!
P.S. i'm new here so sorry if i've somehow done something wrong because i know some forums have different rules etc.
i've been given this idea by a signal engineer to do a detection circuit for level crossings to detect anyone that gets trapped inside. i'm thinking of using PIR emittors and sensors for this and i'm only making a small model out of MDF or similar (this will be like a rectangular cuboid shape except with 2 sides instead of 4 but obviously still with a top and bottom, and the circuit will go between the top and bottom and i'll just draw a traintrack on the top part)
basically there are two outcomes which are represented by two sets of lights. the first is for the operator of that level crossing and that will consist of a green LED for 'crossing clear' and red for 'crossing obstructed'
the second is for the train driver, red so the driver knows to start braking the train, yellow to say 'crossing clear but proceed with caution' and green for just 'carry on as normal'
i'd like to put a scan of this flowchart i made pointing out the whole system but for some reason i can't paste images in here and i have to type a URL in?
anywho, basically first the sensors are activated.
if they detect something - 'crossing obstructed' light is lit and so is the RED light for the train driver
if not - GREEN light (or crossing clear for operator) for both operator and train driver
sensors are activated again
if the detect something 1st AND 2nd time (or just 2nd time)- 'crossing obstructed' for operator and RED for train driver
if they detected something 1st time but NOT 2nd time - 'crossing clear' for operator, YELLOW for train driver (approach with caution)
if nothing both times - remains GREEN for both
this is obviously much better illustrated with a flow chart, but i hope you all understood this! of course don't hesitate to ask questions (provided i can answer them!)
the trouble is i'm not very familiar at all with circuits and so i don't know how to go about constructing one for this, or what components to use, or even how to read other circuits (ie look at one and actually know what it does) so can anyone help me to tell me what i need or what the kind of circuit i'm trying to make will look like?
i'm afraid if anyone can help they'll need to explain in really simple terms because otherwise i really won't understand!
hope it wasn't too long a read....thanks if you can help!
P.S. i'm new here so sorry if i've somehow done something wrong because i know some forums have different rules etc.