Sensing device and sensing system for human-powered devices using the same

A sensing system, suitable for use in a human-powered device, the human-powered device being a bicycle, a spin bicycle, or a training platform and the human-powered device including a transmission belt, the sensing system comprising:

• a sensing device including:
• an idler configured into a ring body and including a pivot connecting portion and a ring contacting portion, the ring contacting portion being in contact with the transmission belt of the human-powered device to receive a mechanical force applied to the idler by the transmission belt;
• a strain gauge device including a rod slot disposed on a side of the strain gauge device, and configured to receive the mechanical force to generate a deformation and generates a sensing signal according to the deformation;
• and
• a connecting rod assembly including a first end connected to the strain gauge device via the rod slot and a second end connected to the idler via the pivot connecting portion, so as to transmit the mechanical force from the idler to the strain gauge device;
• a signal output device electrically connected or communicatively connected to the sensing device for receiving the sensing signal;
• and
• a computing processor electrically connected or communicatively connected to the signal output device for obtaining and processing the sensing signal.

A pedelec with a plurality of riding parameters stored or recorded therein, the pedelec comprising:

• a bicycle including a transmission belt;
• a sensing device disposed on the bicycle, the sensing device including:
• an idler configured into a ring body and including a pivot connecting portion and a ring contacting portion, the ring contacting portion being in contact with the transmission belt to receive a mechanical force applied to the idler by the transmission belt;
• a strain gauge device including a rod slot disposed on a side of the strain gauge device, and configured to receive the mechanical force to generate a deformation and generates a sensing signal according to the deformation;
• and
• a connecting rod assembly including a first end connected to the strain gauge device via the rod slot and the second end and a second end connected to the idler via the pivot connecting portion, so as to transmit the mechanical force from the idler to the strain gauge device;
• a signal output device electrically connected or communicatively connected to the sensing device for receiving the sensing signal;
• a computing processor electrically connected or communicatively connected to the signal output device for calculating a drive signal and data based on the sensing signal and the riding parameters;
• and
• an electric assisted power output module electrically connected or communicatively connected to the computing processor for generating an electrical assisted power corresponding to the drive signal and displaying the data.