From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yx0-f171.google.com (mail-yx0-f171.google.com [209.85.213.171]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 8758A2005CC for ; Mon, 4 Jun 2012 07:25:54 -0700 (PDT) Received: by yenq11 with SMTP id q11so5814266yen.16 for ; Mon, 04 Jun 2012 07:25:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; bh=AXhadBskCUmyzQTU8l1vb0QUiGF/62nO1cFIioCbyBA=; b=zp4W6cs/yA6qiZP+j9yvIox7baGa7rMtHYGlrsLJ1OnNncumnjZnTc9tYS/QSyH8Hh c60LSpokhQzOgQKXo9A5oF5M0jOgsz+lO0dE/7kQGCOjtUupykFplCJ69LOaTl99DAzv 3OjKeEufMFtVjVt4fqxpgSKXp8HXDV89Taa5H/4PLfO8QejwSDtPZbP+nm5LatpWXAlX yJYaVmVBImHcgB0aO1pDCyDrCS+CU4aOlaZUwfhlkP/cZH/rJOBxXI3ZMDtngZkE3CiL c2YY+k4qOMyHNoDgn83bdm9Zy1IgU/PYhWMQsNapJZ5MarwKGWdH2iKUZ8ltdbB8J5Ci f2Fw== Received: by 10.60.1.202 with SMTP id 10mr12100157oeo.15.1338819952485; Mon, 04 Jun 2012 07:25:52 -0700 (PDT) MIME-Version: 1.0 Sender: tz2026@gmail.com Received: by 10.182.90.7 with HTTP; Mon, 4 Jun 2012 07:25:31 -0700 (PDT) In-Reply-To: References: From: tz Date: Mon, 4 Jun 2012 10:25:31 -0400 X-Google-Sender-Auth: zxHg2mUWIOtMDl1SKFqLBpXMEbg Message-ID: To: Dave Taht Content-Type: multipart/alternative; boundary=e89a8fb1fbc0afa6a404c1a64fc7 Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [Thumbgps-devel] quake sensing X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jun 2012 14:25:55 -0000 --e89a8fb1fbc0afa6a404c1a64fc7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I would try to find some cheap outdated but commonly available Android smartphone which would have both GPS and an Accelerometer, and would have connectivity. It might need to be plugged into the charger, but it would have accurate time (from either GPS or the cellphone net, or even NTP), and you could write a background service. I don't know about sensitivity. There are many ways to implement an inexpensive link - I had GPS+Accel+vehiclebus+more going over bluetooth using an Arduino Pro, but the DIY cost in parts was about $100 and was a bit of overkill (and I learned that accelerometers don't like motorcycle vibration). On Mon, Jun 4, 2012 at 9:09 AM, Dave Taht wrote: > I have obtained one of the onavi-B sensors to play with > > The quake sensor stanford is distributing is the > onavi-A and onavi-B, shown here: > > http://qcn.stanford.edu/sensor-performance?lang=3Den > > It uses a KXRB5 MEMS accelerometer from Kionix. > > My intent, originally, was to see if I could find a way to combine > it with a ublox GPS over the internal i2c bus. It looks > like that will require using a different ublox-6 chip than in > the macx-1 with rewritable firmware and a firmware license, and... > well... maybe going some other route like leveraging > an arduino would be saner(?) > > At the moment however, I'm trying to figure > out if there are any better MEMS sensors out there, or > better ways to hook them up than this device > which appears to have it's own protocol, running over > serial... > > http://qcn.stanford.edu/join-qcn/request-a-sensor/sensor49-php > > The qcn.stanford.edu idea is pretty neat. it's designed for boinc > after the fact analysis (and there is linux support) > > The USGS has got a fairly decent looking prototype of an early warning > system, > but their outside estimates for warning time is 20 seconds, presently, > after > what they've designed is fully deployed. (and they are 100m short on > funding) > > > http://blogs.laweekly.com/informer/2012/04/earthquake_warning_los_angeles= _usgs.php > > > -- > Dave T=E4ht > SKYPE: davetaht > http://ronsravings.blogspot.com/ > _______________________________________________ > Thumbgps-devel mailing list > Thumbgps-devel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/thumbgps-devel > --e89a8fb1fbc0afa6a404c1a64fc7 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I would try to find some cheap outdated but commonly available Android smar= tphone which would have both GPS and an Accelerometer, and would have conne= ctivity.=A0 It might need to be plugged into the charger, but it would have= accurate time (from either GPS or the cellphone net, or even NTP), and you= could write a background service.=A0 I don't know about sensitivity.
There are many ways to implement an inexpensive link - I had GPS+Accel+= vehiclebus+more going over bluetooth using an Arduino Pro, but the DIY cost= in parts was about $100 and was a bit of overkill (and I learned that acce= lerometers don't like motorcycle vibration).

On Mon, Jun 4, 2012 at 9:09 AM, Dave Taht <dave.taht@gmail.com> wrote:
I have obtained one of the onavi-B sensors to play with

The quake sensor stanford is distributing is the
onavi-A and onavi-B, shown here:

http://qcn.stanford.edu/sensor-performance?lang=3Den

It uses a KXRB5 MEMS accelerometer from Kionix.

My intent, originally, was to see if I could find a way to combine
it with a ublox GPS over the internal i2c bus. It looks
like that will require using a different ublox-6 chip than in
the macx-1 with rewritable firmware and a firmware license, and...
well... maybe going some other route like leveraging
an arduino would be saner(?)

At the moment however, I'm trying to figure
out if there are any better MEMS sensors out there, or
better ways to hook them up than this device
which appears to have it's own protocol, running over
serial...

http://qcn.stanford.edu/join-qcn/request-a-sensor/sensor4= 9-php

The qcn.stanford.edu<= /a> idea is pretty neat. it's designed for boinc
after the fact analysis (and there is linux support)

The USGS has got a fairly decent looking prototype of an early warning syst= em,
but their outside estimates for warning time is 20 seconds, presently, afte= r
what they've designed is fully deployed. (and they are 100m short on fu= nding)

http://blogs.laweekly.com/informer/20= 12/04/earthquake_warning_los_angeles_usgs.php


--
Dave T=E4ht
SKYPE: davetaht
http://ronsr= avings.blogspot.com/
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Thumbgps-devel mailing list
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