Impact Sensor Search

[Tigerdawg]

I have a press rated at up to 20000 lbf. A customer wishes to monitor the pressing force during their process. I have not been able to find a sensor that can take the impact forces involved.

At initial impact, we have an ~800 lb crosshead moving at up to 20 in/s. Does anyone know of a sensor that can take this shock for at least 250k cycles?

 

[GregLocock]

Can you mount a strain gauge somewhere and then calibrate it to get the impact force?
Cheers

Greg Locock

 

[Tigerdawg]

Strain gauge based load cells are not holding up. I need a sensor that will last more than a few weeks.

 

[CoryPad]

I would contact Instron. They have a division, Dynatup, that specializes in impact testing. I am sure they have an impact sensor that will work for your application.

http://www.instron.com

 

[AJone]

If load cells are not holding up, the simple answer might be to use a larger capacity load.

If after finding one large enough to take the impact, you are runnning out of resolution, you can order load cells with higher output strain gages such as platnium tungsten or bonded silicon. (be sure your load cell supplier is experienced with these gages before asking them to just put them on one of their standard load cell designs.

Do you have additional shock or impact data that might be useful in sizing a correct load cell? Also any specific system or accuracy requirements? Any specifics on which load cells you have already tried and their performance?

 

[GregLocock]

I meant strain gauge the tool itself, not fitting a load cell.

Getting this calibrated might be difficult, but may not be necessary if a relative measure is acceptable. Cheers

Greg Locock