Sunday, 17 April 2016

Digital Logging Of Analog Instruments

The only useful data you’ll ever find is already digitized, but a surprising number of gauges and meters are still analog. The correct solution to digitizing various pressure gauges, electric meters, and any other analog gauge is obviously to replace the offending dial with a digital sensor and display. This isn’t always possible, so for [Egar] and [ivodopiviz]’s Hackaday Prize entry, they’re coming up with a way to convert these old analog gauges to digital using a Raspberry Pi and a bit of computer vision.

The idea behind this instrument digitizer isn’t to replace the mechanics and electronics, as we are so often wont to do. Instead, this team is using a 3D printed bracket that mounts a Raspberry Pi and camera directly in front of an analog gauge. Combine this contraption with OpenCV, and you have a device that’s just smart enough to look at a needle on a dial, convert that to a number, and save it to a file or send it out over WiFi.

It’s an extremely simple device for what [Egar] and [ivodopiviz] admit is a relatively niche application. However, if you only need digital measurements of an analog meter for a month or so, or you don’t want to mess up your steampunk decor, it’s an ingenious build.

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Filed under: Raspberry Pi, The Hackaday Prize

from raspberry pi – Hackaday http://ift.tt/1W8qcWF
via Hack a Day

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