Re: What Microcontroller can be used with inductive loop sensors

On Apr 29, 9:42 pm, Thad Smith <ThadSm...@xxxxxxx> wrote:
simon86 wrote:
Hi,

I am currently working on a university project that concerns the
functionality of an inductive loop sensor. While I understand its basic
functionality I am unsure how to use it with microcontroller.

We will be using the sensor to detect vehicles that are parked in a
parking spot.

There are standard detectors that put out a logic signal, usually grounding
an output line when a vehicle is detected. They are used as input for
traffic light controllers. My understanding of them, though, is that the
standard design is dynamic: they average the inductance over time to set a
threshold. Typically they will "tune out" cars that set over them for many
minutes. That might make the standard units unworkable if you want to
detect when a vehicle leaves its spot.

--
Thad

Our design output a PWM signal based on impedance (mix of capacitance
and inductance). It works well as long as the Z distance is small
compared to the X,Y or radius. For example, I have seen detection
rings of 1.5 times the size of cars.
A few of them are at the intersection outside my house.
.

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