New Detector and Patent

[Anonymous]

Detector Systems Pty Ltd. is an Australian Company
New Aussie PI detector and patent, slow load on patent.
No Magic. But different approach.
Patent # AU 2003200178
Just put in 2003200178.
JC

 

[Anonymous]

Just mention a new detector and watch the
fun.

 

[Anonymous]

More fun.

 

[Anonymous]

Here's another patent search site.
While I am at it, then back to work.
That Aus. patent is pretty good info for
those learning the PI.
Still looks likes a few points along the decay
curve to me whether horizonal or vertical.
Compare with a table of target signitures.
How to gain compensate this for distance?
Is that a direct multiplication for gain
scaling an exp. decay? then there is that
intial offset curve.
Multi targets ground salt/minerals hotrocks,
could get messy.
JC

 

[Anonymous]

Don't miss this, scroll down.
JC

 

[Anonymous]

Hi JC,
A reference is made to Patent US6326790 and this is also worth a look. Figure 8 of this patent displays his particular results for the curves from different metals and it is a pity he doesn't show the magnetic effect from a mineral such as magnetite and the decay from ironstone soils there also.
It gives an insight into the effects of different metals taken at different times before and after the point that the inventor calls the knee of the curve and this is best seen using a tight, clamped tx method as ML uses. In this case, T4 is used as in conventional pi to indicate the presence of a target and also it’s signal strength as at this point you only get the target's amplitude signal indicating it's distance change in relation to the probe/coil. If the mineral’s magnetic (coil inductance change) and FRD effects were to be included and overlaid on the shown tx/rx gain/loss effects that are present around the knee then what N. E. Fisher has proposed would be a bit more obvious and would also show why the magnetic effect from magnetite can have such a large effect in some cases.
Anyway, US6326790 is definitely worth a look if only for the discrimination feature, circuit ideas and comments. It does make you wonder a bit how patents are policed though when you see the number of inventors that have proposed something similar.

 

[Anonymous]

Hi Robby_H,
I've seen the patent you are refering to.
No matter how you slice it, still three points on the
decay curve, whether measured horizontal or vertical.
This patent didn't really deal with how you scale the
signals for distance change when comparing with the target signiture look up table. Not sure this is just a linear scaling (in fact sure it is not for this exponential decay).
You are right, how about multiple targets, ground minerallzation, hot rocks, now you have the problem everyone has. But hey should work good in air tests, and you are right, this has been patented before several times.
JC

 

[Anonymous]

Interesting post JC.There does not seem to be much of a future for the detector systems detector if they are copying someones elses patent.I here from friends in Oz that investors are getting restless,no wonder!
No one from the company will deny or confirm if they are using this Oz patent and the project keeps getting put off. It is really becoming a bit of a comedy festival i hear!

 

[Anonymous]

Hi JC,
Looked at the patent application submitted by Detector Systems. Must agree...interesting. I would question the statement of using comparators and DACs as this patent suggests purely because Flash type ADCs are expensive? On the contrary, the speed of the DACs settling time would have to be just as fast I would have thought. In fact the invention by it's very nature (around the dac/ comparator) is the very thing some ADCs are based on eg successive approximation types. There are many flash type video ADCs around these days (albiet 8 to 12 bits) which can be purchased for less than $4 Australian so I am having a quiet chuckle about that section of the application. Still, will be interested to see what comes of it as there are some interesting observation s within it. Just my thoughts anyway.
Cheers