Sanofi
Rotation Sensing Arrangement for an Injection Device

Abstract:

The present disclosure relates to a rotation sensing arrangement for an injection device. The rotation sensing arrangement includes a first member and a second member that are rotatable relative to each other with regard to an axis of rotation, at least one signal generator arranged on the first member, at least one sensor arranged on the second member, and a processor (240) connected to the at least one sensor. The at least one sensor includes an interdigital electrode structure configured to generate an electrical signal in response to a movement of the at least one signal generator relative to the sensor. The processor is operable to calculate an angle of rotation of the first member relative to the second member on the basis of the electrical signal.