need help with final qualification work

[pascha__groznyj]

Hello everyone, I'm doing my final qualifying work at the university on electric bicycles. Are there frame drawings for three-bolt engine connections for shimano engines, for example? I have the approximate dimensions for the engine itself in the picture.
I would also like to know how the torque sensor works. I found a patented technology from Bosch, where the load cells are on the bushing, and the connecting rod shaft simply sticks into this bushing. I think the same principle applies to shimano, or I may be wrong. If this is really the case, then it is unclear to me how the readings are taken from the strain gauges, because they rotate together with the bushing, maybe there are current-removing brushes?

 

[Paulquattro]

Welcome to the site

 

[JimmyBoy]

See:
E-Bike Torque Sensor Technology Comparison
also:
Contactless Torque Sensor Module
The magnet and rotation sensor pcb in the picture you show form the cadence and pedal position sensor.

 

[steve_sordy]

The first place to try would be the Shimano Technical Documents.

si.shimano.com

si.shimano.com

 

[JimmyBoy]

Magnetic position sensors as your picture:
Triaxis® mainstream rotary & linear position sensor (analog/PWM)

 

[pascha__groznyj]

See:
E-Bike Torque Sensor Technology Comparison
also:
Contactless Torque Sensor Module
The magnet and rotation sensor pcb in the picture you show form the cadence and pedal position sensor.

Thanks for the links, I learned a lot of new things. I wrote to the Danish company so that they would send the specification for their product in more detail

 

[pascha__groznyj]

Magnetic position sensors as your picture:
Triaxis® mainstream rotary & linear position sensor (analog/PWM)

As I understand it, the Danes are making a 2 in 1 device that reads signals from strain gages and the angle of rotation of the shaft