how to control laser doppler vibrometer via ethernet

[Henrik_Volkers]

Here you posted a documentation of the telnet protocol to control the LDV.

What parameters do you need to control?   (Note: I didn't ask what you what to control 😉 )

Where did you run into trouble?

May I ask for your application?  (I use LDV for ~10a, so I'm just curious 🙂 )

[deutchland]

http://www.optomet.de/en/products/swir-dual-fiber-vibromter/

this is the vibrometer link

OptoMET Dual Fiber SWIR Vibrometer

[deutchland]

till changing the controls via ethernet i had done but fetching data we use oscilloscope 

but we want  to get live data through ethernet and then going for further signal processing via filters ....

company has poor documentation of there own driver and hey might had assembled some third party hardware  which they donot want to mention and present any knowledge

i still have option to use analog to digital converter from NI but my company donot want to invest more on this.

application is to monitor very small vibrations in devices which company makes

[deutchland]

please send me emil so that i can send you the driver

[Henrik_Volkers]

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@deutchland wrote:

please send me emil so that i can send you the driver

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Sorry, I don't need your driver since I don't have your hardware 🙂

I was curious about what you are measurering with the LDV.

So you get information from the manufactor on how to control it but not how to read data?

The wiresharc tool has already been mentioned...

[deutchland]

yes you got it utill controlling manufacturer can help but how to get data he himself dont know only one software guy in his company.

i will try wiresharc this weekend

[deutchland]

this is what i got from the company on 6 th of oct

[Henrik_Volkers]

I remember playing around with udp ...   it's like the unit (LDV) is just crying out the values on the ethernet wire to everyone hooked on.

LabVIEW can read udp packets.

time for a producer consumer vi  🙂 read the raw data (producer) and parse it to values (consumer) .With the format provided you can write your parse stateMC.

Reading the wikipedia article and LV-Help give further information.

If you run into problems; remember to attach some udp raw data packets ...

[deutchland]

I tried to read data via udp in labview while watching an example. first it gave error 56  now it gives 63 with buffer overflow. i am using udp first time and have no idea about it.

here i attached  .vi wireshark and error

[Henrik_Volkers · Accepted solution]

Don't know where the error is comming from... Blocksize??

From the wireshark file i could extract blocks ...    however the 20MHz samplerate seems too fast so an discontinued data flag is showing if I interpret rigth 🙂

I attached the vi ... but it's really quick and dirty 🙂    the real decoding shouldn't be done with the scan for tokens since the datablock can contain any data...including the token I used 😉