Knock sensor on Dyno

[steve ravet]

> Date: Mon, 10 Jan 2000 15:00:32 -0800 (PST)
> From: Carter Shore <clshore at yahoo.com>
> Subject: Re: DIY_EFI Digest V5 #14:Knock sensor on Dyno
> 
> Bruce,
> I believe that the sensors are built to be sensitive
> to specific frequencies, to minimize false trigger,
> etc. In other words, they are specific to a given
> engine.
> 
> I have been working with freeware audio spectrum
> analyzer program that uses the sound card on a PC. By
> connecting a wide band microphone to the motor, and
> then simulating knock (resembles pounding on the block
> with a hammer or broomstick), the characteristic
> frequencies of a given motor can be determined. The
> resonant frequencies show up as spikes. If you can
> safely induce actual knock in the running motor, even
> better results.
> 
> Using that info, the PC software can be set up to look
> for knock signals for that specific motor.
> 
> All freeware, just need to bolt on a microphone
> (guitar mic?) Save the results on a floppy.
> 
> YMMV, I'm just playing with it right now.

Carter -- what is this software called and where is it available from? 
This is very interesting.

--steve


-- 
Steve Ravet
steve.ravet at arm.com
Advanced Risc Machines, Inc.
www.arm.com