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James.

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Reply with quote  #1 
Hello all,

I've been helping a friend set up and configure their SPM VA. I'm impressed with the HD enveloping, reminds me of PeakVue.

Here's the link to the case study

https://theseasonedanalyst.guru/2019/07/15/a-vibration-analysis-program-case-study-utilising-spm-hd-enveloping/

Anyone else using the HD Enveloping?

Regards
James
JuddJones

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Reply with quote  #2 
I used it for a couple years at my previous employer. Very impressed with it. I was very happy with just about everything with the SPM system.
fburgos

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Reply with quote  #3 
whats this spm hd enveloping?  afaik shock pulse method is regular enveloping with a bandpass filter around accelerometer resonace

is a stress wave detection like peakvue?
MarkL

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Reply with quote  #4 
in a Nutshell Ferdy....yes.
James.

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Reply with quote  #5 
Yep, as Mark said. Its great that you don't have to keep swapping to the SPM Accelerometer and can use the one normal 100mV/g
VibGuy~5

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Reply with quote  #6 

Hi James,

I used it in Oz for a while-very impressive for slow speed, but you needed 2 sensors-1 for SPM HD and one for standard vibration. Stress wave detection combined with auto-correlation, noise rejection and order tracking. The sensor is large, big brass bar with resonant freq of 37 kHz I think. The bigger the bar, the bigger the signal for amplifying low speed, low amplitude stress waves.

Now it’s all combined in one I believe?

OLi

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Reply with quote  #7 
But it is still a 2 part sensor I think but in 1 housing? Normally the old had a around 32kHz resonance I think but may not remember exactly. "Only" new with HD is 24bit A/D they said when you ask them.
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VibGuy~5

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Reply with quote  #8 

Yes, 2 part sensor in one. Could be 32 kHz-memory is fuzzy.

James.

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Posts: 113
Reply with quote  #9 
Hi, yes they now have a duo tech sensor for normal and SPM. But what I like about the SPM HD Enveloping is that it uses the same Accel for normal vibration.

James.

Quote:
Originally Posted by VibGuy~5

Hi James,

I used it in Oz for a while-very impressive for slow speed, but you needed 2 sensors-1 for SPM HD and one for standard vibration. Stress wave detection combined with auto-correlation, noise rejection and order tracking. The sensor is large, big brass bar with resonant freq of 37 kHz I think. The bigger the bar, the bigger the signal for amplifying low speed, low amplitude stress waves.

Now it’s all combined in one I believe?

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