tag:blogger.com,1999:blog-8333628212456165523.post343377983077387895..comments2023-09-13T07:47:00.065-04:00Comments on BBQ, Banjos and Blues - All Things Southern: A Home Security System - Sensors OODBanjohttp://www.blogger.com/profile/14823386772716724924noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-8333628212456165523.post-4228928845546786362013-06-10T12:18:47.426-04:002013-06-10T12:18:47.426-04:00Fabien,
Your suggestion for pump monitoring is a g...Fabien,<br />Your suggestion for pump monitoring is a good one which I will keep in mind for the future, which would move past the immediate goal of a security system and towards the goal of whole house monitoring and ultimately home automation.<br /><br />I plan on monitoring electrical devices, such as pumps, via current sensors at the power distribution panel.Banjohttps://www.blogger.com/profile/14823386772716724924noreply@blogger.comtag:blogger.com,1999:blog-8333628212456165523.post-60160790995764682332013-06-09T13:11:39.509-04:002013-06-09T13:11:39.509-04:00For the sensors, will need provision for a debounc...For the sensors, will need provision for a debouncing attributes. It is not unusual to have dry contacts (doors, windows) debounced between 50 and 700 ms. My old ADEMCO system has a parameter that can be set to 70 or 700 ms. <br /><br />Also, there are some clever ways to debounce inputs that can also provide a diagnostic on the sensor, wiring or installation quality. When we can oversample the input to 8x or more, a voting algorithm can provide a three states output (0, noise, 1) based on the last (8 or more) input scans. When the configured noise condition (e.g. 3 to 5) is detected for some time (configurable), an advanced "check hardware" alarm could be issued.<br /><br />I wish you could also classify other house subsystems monitoring like pumps. These type of monitoring require a few more parameters. I am developping the algorithms now, I can help on this aspect. For each pump, I can see three different alarms : 1-Duty cycle (pump functions too much, or continuously), 2-Frequent startups (pumps turn-on & off too frequently), 3-Inactivity (pump hasn't functionned for a long time).Anonymoushttps://www.blogger.com/profile/02507830669084206568noreply@blogger.com