My ShockDyno

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This is a rough and ready video of some aspects of my homemade shock dyno. A device for measuring the damping characteristics of motorcycle shock absorbers.
The differences in the data between using a position sensor and an LVT (Linear Velocity Transducer) for position and velocity data is highlighted. Unfortunately the sound is not good. It disappears in some places. The following links cover this aspect in clearer detail.
www.homemadeto...
and a couple of videos
• Velocity measuring - m...
• Velocity measuring - m...

Опубликовано:

20 окт 2024

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Комментарии : 12

@tiitsaul9036 9 месяцев назад

This is incredible

@MotoChassisByTonyFoale 8 месяцев назад

Glad you like it.

@canberradogfarts Год назад

Praise the gods you've made it thru covid AND ewe toob finally sent me one of ur vids

@EVguru Год назад

Always enjoy on of your videos. I really must put my dyno back together, it was only lashed up temporarily and the plots traced with the X,Y function of the digital scope. The sound was breaking up at some points and there were a couple of silent sections that it wasn't clear if they were intentional or not.

@iancoulston6452 Год назад

@Paul Compton the video description acknowledges that the sound does drop out at times.

@MotoChassisByTonyFoale Год назад

Paul, I have added some links in the description to related stuff without the sound problem.

@vpservice1016 Год назад

Is this software available to buy in the near future??

@MotoChassisByTonyFoale Год назад

Send me an email motochassis@gmail.com

@virtualmarc2383 Год назад

I think of POTs as ridiculously inaccurate. couldn't you replace all your sensors with a rotary encoder like the one you put on your lathe? Run the string over a small pulley on the shaft of the encoder and calculate acceleration etc in the MCU.

@EVguru Год назад

Resistive sensors have been long used on professional damper dynos and indeed for live travel measurement on track. I've obtained very clean readings (in a different application) from pots with conductive plastic tracks. Metal film, or Carbon, not so much.

@MotoChassisByTonyFoale Год назад

Paul Compton pointed out that using pots for displacement measurement is a well accepted practice. As far as I am concerned the problem with any displacement sensor is when you differentiate the displacement to get velocity. Increased velocity noise cannot be avoided, it is fundamental to the differentiation of digital signals. Whereas using a velocity sensor the velocity gets integrated to get position and that operation reduces displacement noise. Unfortunately, the sound on the video was very bad during those explanations. I only use a displacement sensor when using extremely slow velocities to investigate stiction and friction. All other tests are done using an LVT. Here is a link to some measured results www.homemadetools.net/forum/something-completely-different-83989#post175969 and a couple of videos ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-s0aUpGoeBIA.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-NCvKRgbF1uA.html

@virtualmarc2383 Год назад

@@MotoChassisByTonyFoale thank you for your detailed reply to my question. Your comment on differentiation and integration is well taken. And thank you for the links.