Torque telemetry systems help you turn a difficult measurement exercise into a simple and effective solution.
Torque is a 'turning force'; the force that has to be applied to turn something.
Usually, you can’t use wires when you want to measure the torque on a shaft or anything else that’s moving.
If you need to make a non-contact connection, wireless technology is the answer.
It's the answer to the two challenges that have to be overcome to do this type of measurement.
But first let's consider a working definition.
It means measuring torque at a distance. It lets you get the result of the measurement back to where you want to receive it.
Torque is a turning force, and if you want to measure it you can’t use wires… unless you want to measure static torque on a shaft that doesn’t rotate more than 360 degrees, otherwise any wires connected to it will just break.
Rotating telemetry systems overcome these two specific problems...
the sensors attached to rotating shafts.
Here are two wireless ways to transfer power and measurement data to and from the torque sensor unit.
Here's an interesting application of wireless torque telemetry that doesn't involve continuous rotation...
Have you ever carefully tightened bolts to the specified torque, knowing that if those bolts ever became loose that the consequences may be very expensive or dangerous?
Now you can get bolts that continuously monitor their own tightness. This may be of value in a critical application where there is continuous vibration or impact that may, over time, loosen bolts.
One option, where you can fit new bolts, is to use the type that has a sensor built into it. However, if you need to use the existing bolts, another option lets you fit a washer, containing a load sensor, under the head of the bolt.
The bolt then wirelessly transmits its 'tightness' data to a receiving station that can direct alarms or notifications to engineers to investigate.
Torque isn't the only kind of telemetry. You can
remotely measure any physical property that you can convert into an
electrical signal, using a sensor or transducer. For a more general
discussion on wireless telemetry and examples of some applications.