Self-weighing backpack with weight notification features

A self-weighing backpack comprising:

• a container body;
• a right carry strap including a first strain gauge and connected to a right part of the container body, said first strain gauge configured to provide a first force measurement output signal;
• a left carry strap including a second strain gauge and connected to a left part of the container body, said second strain gauge configured to provide a second force measurement output signal;
• processing circuitry configured to receive a first force measurement output signal and the second force measurement output signal and determine at predetermined times a total dynamic force applied to the right carry strap and the left carry strap, and generate an audio alert signal when the total dynamic force exceeds a predetermined threshold force;
• an information panel that receives from the processing circuitry an indication of the total dynamic force and provides a visual display of the total dynamic force;
• a non-transitory computer readable storage device that has stored therein an indication of the predetermined threshold force, said predetermined threshold force corresponding to a weight of a user on which the self-weighing backpack is mounted;
• and a hinged scale that is rotatably attached to a bottom of the container body, and when stood on by the user, provides an indication of weight of the user, wherein the computer readable storage device saves the weight of the user, and the processing circuitry determines the predetermined threshold force in association with the weight of the user.