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From: al@umich.UUCP (Allen Leibowitz)
Newsgroups: net.auto.tech
Subject: Re: Re: Motion sensors in car alarms
Message-ID: <499@umich.UUCP>
Date: Mon, 3-Mar-86 17:59:27 EST
Article-I.D.: umich.499
Posted: Mon Mar  3 17:59:27 1986
Date-Received: Wed, 5-Mar-86 03:33:10 EST
References: <8927@ucla-cs.ARPA> <560@mmm.UUCP>
Distribution: net
Organization: University of Michigan, EECS Dept., Ann Arbor, MI
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> In article <8927@ucla-cs.ARPA> wales@ucla-cs.UUCP (Rich Wales) writes:
> >What do other people on the net feel about motion/impact sensors?
> 

I have an alpine alarm (which I absolutely love).  It
has a motion sensor which is self leveling (couple of
servos level when the alarm sets).  For impact sensing
they put piezo microphones in the door jambs.

All the sensors are adjustable.  The only false I've had
is when it was really cold and the car 'pinged' after
being quite warm.  I had the microphones turned way up.

There is also a switch that says you have to have the
microphone AND another switch go off within a minute.