Looking for Torque and Angle Sensor
Looking for Torque and Angle Sensor
(OP)
Hey guys,
Our company builds a special kind of physical rehab equipment. It is all based on pendulums and fulcrums and has no electronics whatsoever in it. We now want to add some smarts to this line of equipment and i think that by installing a torque and angle sensor into the axis of the pendulum we will be able to take some useful measurements. the problem is im struggling to find a cost effective (under $500 USD) solution which combines a torque and angle sensor. The maximum torque is say 1000Nm and the maximum angle is under 160deg. Ideally this combined sensor would be smaller then a standard brick. Also we would love this sensor to be able to send wireless data out into the processing unit for calculations. Is this something that exists and if so could you please point me to the right direction.
Thanks a lot for the time and help!
A.
Our company builds a special kind of physical rehab equipment. It is all based on pendulums and fulcrums and has no electronics whatsoever in it. We now want to add some smarts to this line of equipment and i think that by installing a torque and angle sensor into the axis of the pendulum we will be able to take some useful measurements. the problem is im struggling to find a cost effective (under $500 USD) solution which combines a torque and angle sensor. The maximum torque is say 1000Nm and the maximum angle is under 160deg. Ideally this combined sensor would be smaller then a standard brick. Also we would love this sensor to be able to send wireless data out into the processing unit for calculations. Is this something that exists and if so could you please point me to the right direction.
Thanks a lot for the time and help!
A.





RE: Looking for Torque and Angle Sensor
The latter is only required if there is some reconfiguration that changes the leverage between the pendulum and the input.
RE: Looking for Torque and Angle Sensor
TTFN
I can do absolutely anything. I'm an expert!
homework forum: //www.engineering.com/AskForum/aff/32.aspx
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Looking for Torque and Angle Sensor
Maybe i didn't explain it clear enough. The machine has many settings changing the distance between the axis and the point where the force is applied downwards. Here is a picture. At the point labeled axis, I want to measure torque and angle of rotation of the axis.
Also the force changes constantly.
imgur.com/22MFvv7
Thanks :)
[img imgur.com/22MFvv7]
RE: Looking for Torque and Angle Sensor
Do you have a complete free-body diagram of the entire mechanism?
RE: Looking for Torque and Angle Sensor
Here's a better one http://imgur.com/95n1HPN
thanks
RE: Looking for Torque and Angle Sensor
TTFN
I can do absolutely anything. I'm an expert!
homework forum: //www.engineering.com/AskForum/aff/32.aspx
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Looking for Torque and Angle Sensor
Do you know of any cost-effective 3-axis accelerometers that could enough precision and have a wireless connectivity?
Many thanks
RE: Looking for Torque and Angle Sensor
RE: Looking for Torque and Angle Sensor
RE: Looking for Torque and Angle Sensor
TTFN
I can do absolutely anything. I'm an expert!
homework forum: //www.engineering.com/AskForum/aff/32.aspx
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Looking for Torque and Angle Sensor
The same sort of thing can be made with Arduino, but the CC430 series is very low power where one might expect months of use on a C2032 coin cell. The Sparkfun item above is the IMU chip alone; to use it requires a circuit board and some decoupling caps, so the $40 https://www.sparkfun.com/products/11028 item will likely be the required one.
The original idea you had - mostly that is test equipment territory, so figure a few grand. Here's a nice torque cell https://www.transducertechniques.com/rst-torque-se... or the cheaper https://www.transducertechniques.com/sws-torque-se... Check the related equipment tab, which isn't wireless. Still no angle sensor or display or recording/transmitting ability.
I think the lack of a free body diagram, any sense of the requisite accuracy or suggestion of budget is the largest problem.
RE: Looking for Torque and Angle Sensor
TTFN
I can do absolutely anything. I'm an expert!
homework forum: //www.engineering.com/AskForum/aff/32.aspx
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Looking for Torque and Angle Sensor