[Upcycle It] WiFi Connected Smoke Detector #10: Addressing False Positives

RE: [Upcycle It] WiFi Connected Smoke Detector #10: Addressing False Positives

Workshopshed — Tue, 30 May 2017 10:53:18 GMT

>If the signal above 470 the counter get increased by 10. If it is below 470, it gets decreased by 1 while its value is above 0.

How about a simple hysteresis? That should help detect a continually loud noise rather than intermittent shouting.

If the signal above 470 the counter gets increased by 1. If it is below 420, it gets decreased by 1 while its value is above 0.

RE: [Upcycle It] WiFi Connected Smoke Detector #10: Addressing False Positives

DAB — Mon, 29 May 2017 18:20:28 GMT

Nice update.

Now you are beginning to understand why many systems have gone to fuzzy logic.

Binary decision points are great in absolute environments, but not so good for real world applications.

Fuzzy logic permits you to enter multiple levels of decision making using different levels of analysis depending upon all of the available data and system state.

So far, the results of using these Fuzzy decision point algorithms have proven to be very useful in these types of applications.

DAB

RE: [Upcycle It] WiFi Connected Smoke Detector #10: Addressing False Positives

mcb1 — Mon, 29 May 2017 09:13:38 GMT

If the signal above 470 the counter get increased by 10. If it is below 470, it gets decreased by 1 while its value is above 0

Curious why you raise it by 10, but only reduce by 1.

I'm presumming that when the alarm does go off, the numbers are very large.

Mark