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# Torque sensors for a small system

## Torque sensors for a small system

(OP)
Hello All,

### RE: Torque sensors for a small system

(OP)
Cheers everyone for the replies and ideas. Do you recon there are any torque sensors that can be used be used given my parameters? or is my system too small? I have a reasonable budget of up to \$800 if I can find a suitable torque sensor but for the life of me nothing in the market seems suitable.

### RE: Torque sensors for a small system

Tough to find one that will bring the signals out from a rotating shaft. How much sensitivity do you need? Strain gaging the shaft might not be too expensive but then you would have to figure out a way to get the signal from the rotating shaft. If your sensitivity requirements aren't too tough you might be able to find an inexpensive 4 channel slip ring assembly. High sensitivity means low noise and slip rings for that get more expensive.

### RE: Torque sensors for a small system

What drives this thing? Can you measure the torque there? I'm thinking of the neighborhood "mechanics" that would calibrate their flexible motor mounts with a torque wrench, then read the torque output by the corresponding movement of a bar bolted across the top of the engine while racing up a hill with the hood off.

### RE: Torque sensors for a small system

Can you mount the motor like a dynamometer?

### RE: Torque sensors for a small system

Tacometer? Lunch anybody :)

The problem with sloppy work is that the supply FAR EXCEEDS the demand

### RE: Torque sensors for a small system

(OP)
Brain many thanks for both of your responses. I'll definitely have a look slip ring assembly to see if there's anything suitable. The dynamometer idea is quite interesting but I'm not certain if I can pull it off because the shaft has to be vertical.

Buggar, It's a small rotating mechanism, the purpose of the shaft is to make it easier to estimate the mechanical power coming from the mechanism. With regards to the torque wrench do you recon there's anyway it could be used to estimate the torque of the shaft in some way? I've attached an example product to shown what I mean. Thanks again for your interest in this problem.

### RE: Torque sensors for a small system

Similar to what Brian mentioned, would a Prony brake work?

Kyle

### RE: Torque sensors for a small system

Whether the shaft is vertical or horizontal does not mater to a dynamometer. It measures reaction to system torque not reaction to weight (gravity).

Ted

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