HMR2300 Development Kit

It's not a stand alone unit. Ideally, a magnetometer will develop a 3D image. Using 3 (or more) of them in an array would do that from the instant you turn it on. Using one of them requires that you use it and record the readings across location, distance and time domains. Complicated stuff. Thus, it is called a development kit.

From the perspective of it working to detect anomalies, you are right. It already works.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,18221.msg117998.html#msg117998

The sensor itself is able to sense in the x,y and z axis. That doesn't mean three dimensional. It means only from the sensor itself. Imagine you were sitting inside of the sensor with one eye covered with a patch. You can look up, down, and sideways very rigidly through three tubes and are asked to describe something that is behind a square of paper that blocks your view in one direction. Since one eye is shut, you have no idea in reality how far away that item is and how large it really is. It could be right next to you and be only an inch square. Or it could be a yard away and be a yard square. Since a one eyed viewpoint is limited to two dimensions, that's all you have at your disposal regarding your environment.

Now, uncover the blinded eye and use two tubes in each direction, one for each eye, and you can now tell how big the square is and how close it is. Also, as you scan around you in your three directions other things become evident from having two sensors.

When I suggested 3 or 4 sensors working in tandem, that was to increase your area of sensing and to fine tune the result. With 4 eyes in your head, you'd be far better able to see things and analyze them. Give your project 4 "eyes" and it will pay dividends.

There's a trade magazine called Sensors magazine. When I was designing projects, that magazine was an amazing resource. You owe it to yourself to see if it is still in publication. It's free to qualified individuals and companies. Well, we're in luck. It's still around and you can sign up on the web. How's that for convenient?

You are not allowed to view links.
Please Register or Login

As to recording the data, that's meaningless with one sensor. It's a single datapoint and nothing more at this point. That's why they call it a development kit. Take your sensor, spin it around slowly on a wheel with binary encoding and your readings might be more useful. Then you'd have many datapoints which are tied to a location in angular direction and distance from the center of the wheel. A good start but 4 sensors would be much easier.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,18221.msg118047.html#msg118047