Re: configuration- inductive loops - mixed traffic ( indian road conditions )- microcontrollers

bluesky wrote:

hi,
In the context of a microcontroller based traffic light controller that
uses inductive loop to detect presence/speed etc of vehicles on the
indian roads, I am curious to know if a configuration of inductive
loop in the verical plane has been used for traffic monitoring/control
applications?, If not, how can it be used? Such an application can
potentially alleviate the installation/maintenance problems with buried
inductive loop based detectors.
I am considering using an 8/16 bit AVR based microcontroller for this
project.
Also, the traffic flow is expected to be heavily mixed, with scarce
lane discipline (perhaps even absent:P). Considering using the
inductive signature of vehicles to identify them (may need 32 bit ARM
then? )

(overhead) cable
_______________
| |
| |
| vehicle passes | <--- (vertically mounted side) cable
| through the loop |
|_______________|
EARTH ( part of loop )
google did not help with the configuration question. only provided info
on buried detectors.

Looks like you are considering making a large loop around the entire traffic
flow. Could be a problem with unexpectedly high loads on some goods
vehicles. Are you aiming at bulk traffic detection regardless of which, if
any, lane it might appear in?

Appropriate sensor selection and design is always a factor in developing
embedded systems. Have you considered the other technologies like
ultra-sonic or microwave detection devices that are often used with the
portable traffic light systems used at road-works. These might be simpler
to install and be more effective in certain situations.

By making the sensor circuit an individual module of the traffic system you
can use the same microcontroller part regardless of sensor type (it is
after all only digital indication of traffic present/not present and
perhaps an indication that the module is working properly.

--
********************************************************************
Paul E. Bennett ....................<email://peb@xxxxxxxxxxxxxxxxxx>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
********************************************************************
.

Relevant Pages

  • configuration- inductive loops - mixed traffic ( indian road conditions )- microcontroll
    ... uses inductive loop to detect presence/speed etc of vehicles on the ... loop in the verical plane has been used for traffic monitoring/control ... I am considering using an 8/16 bit AVR based microcontroller for this ... inductive signature of vehicles to identify them (may need 32 bit ARM ...
    (comp.arch.embedded)
  • Re: configuration- inductive loops -
    ... mixed traffic (indian road conditions)- microcontrollers ... uses inductive loop to detect presence/speed etc of vehicles on the ... loop in the verical plane has been used for traffic monitoring/control ... inductive signature of vehicles to identify them (may need 32 bit ARM ...
    (comp.arch.embedded)
  • Re: configuration- inductive loops - mixed traffic ( indian road conditions )- microcont
    ... uses inductive loop to detect presence/speed etc of vehicles on the ... loop in the verical plane has been used for traffic monitoring/control ... I am considering using an 8/16 bit AVR based microcontroller for this ... inductive signature of vehicles to identify them (may need 32 bit ARM ...
    (comp.arch.embedded)
  • Re: a question of ECC
    ... Just lining along with a ... loop inside the south is too visiting for Mhammed to arise it. ... vehicles. ... Don't suit the soils remarkably, ...
    (sci.crypt)
  • Re: PLL question
    ... > use microcontroller as a dividing element in the feedback loop. ... My 4046 VCO is running ... The only problem I've had is phase noise. ...
    (sci.electronics.design)