Biomechanical sensing system using wirelessly locatable tags

A computer-implemented method for monitoring a body position of a user, the method comprising:

• receiving, at an electronic device, a first wireless signal of a first wirelessly locatable tag that is positioned along a first region of a back of the user, the first wirelessly locatable tag having a first wireless circuit configured to transmit the first wireless signal;
• determining a first distance from the electronic device to the first wirelessly locatable tag based at least in part on the first wireless signal;
• receiving, at the electronic device, a second wireless signal of a second wirelessly locatable tag that is positioned along a second region of a back of the user, the second wirelessly locatable tag having a second wireless circuit configured to transmit the second wireless signal;
• determining a second distance from the electronic device to the second wirelessly locatable tag based at least in part on the second wireless signal;
• receiving, at the electronic device, a third wireless signal of a third wirelessly locatable tag that is positioned along a third region of a back of the user, the third wirelessly locatable tag having a third wireless circuit configured to transmit the third wireless signal;
• determining a third distance from the electronic device to the third wirelessly locatable tag based at least in part on the third wireless signal;
• and
• determining a characteristic of the body position of the user using the first, second, and third distances.

A system for monitoring a body position of a user, the system comprising:

• a host device having a device wireless circuit;
• a set of wirelessly locatable tags configured to be positioned along a body of the user, the set of wirelessly locatable tags comprising:
• a first wirelessly locatable tag configured to be positioned along a first region of a back of the user and having a first battery and a first tag wireless circuit configured to transmit a first locating signal to the host device;
• a second wirelessly locatable tag configured to be positioned along a second region of the back of the user and having a second battery and a second tag wireless circuit configured to transmit a second locating signal to the host device;
• and
• a third wirelessly locatable tag configured to be positioned along a third region of the back of the user and having a third battery and a third wireless circuit configured to transmit a third locating signal to the host device each wirelessly locatable tag of the set of wirelessly locatable tags comprising:
• a tag wireless circuit configured to transmit and receive wireless signals to and from the device wireless circuit;
• and
• a battery operably coupled to the tag wireless circuit, wherein the system is configured to:
• determine a first distance between the first wirelessly locatable tag of the set of wirelessly locatable tags and the host device by measuring a first transmission duration for the first locating signal transmitted between the host device and the first wirelessly locatable tag;
• determine a second distance between the second wirelessly locatable tag of the set of wirelessly locatable tags and the host device by measuring a second transmission duration for the second locating signal transmitted between the host device and the second wirelessly locatable tag;
• determine a third distance between the third wirelessly locatable tag of the set of wirelessly locatable tags and the host device by measuring a third transmission duration for the third locating signal transmitted between the host device and the third wirelessly locatable tag;
• compute a position of a computer-generated avatar using the first distance, the second distance, and the third distance;
• and
• cause a display the computer-generated avatar in the computed position.