Determination of cause of disconnection of sensors of a motion tracking system

A motion tracking system comprising:

• a sensor to track a body of a person;
• and
• a computing device;
• the sensor being configured to establish a wireless communications connection and to at least transmit data through the wireless communications connection;
• and
• the computing device being configured to establish the wireless communications connection and to at least receive data through the wireless communications connection, and comprising at least one processor and at least one memory, the at least one memory being configured, with the at least one processor, to at least cause the computing device to perform operations comprising:
• establishing the wireless communications connection with the sensor;
• receiving a plurality of packets from the sensor through the wireless communications connection;
• measuring a signal strength of the wireless communications connection with the sensor while the wireless communications connection is established;
• processing signal strength values corresponding to the sensor when the sensor has been disconnected from the computing device so as to determine that the sensor has been disconnected from the computing device due to a distance increase between the person and the computing device, wherein the determination that the sensor has been disconnected from the computing device due to the distance increase between the person and the computing device is based on determining that:
• a difference between a first signal strength value measured at a first time instant and a second signal strength value measured at a second time instant is greater than or equal to a predetermined minimum signal strength drop threshold, the second time instant being after the first time instant, and the second signal strength value being less than the first signal strength value,
• a time elapsed between the first time instant and the second time instant is less than or equal to a predetermined maximum signal drop time threshold, and
• a time elapsed between the second time instant and disconnection between the computing device and the sensor is less than or equal to a predetermined maximum disconnection time threshold;
• and
• providing or commanding provision at least one user perceptible signal when it has been determined that the sensor has been disconnected due to the distance increase between the person and the computing device.

A non-transitory computer-readable storage medium comprising instructions which, when executed by a computing device, cause the computing device to at least perform operations comprising:

• establishing a wireless communications connection with a sensor that tracks a body of a person;
• receiving a plurality of packets from the sensor through the wireless communications connection;
• measuring a signal strength of the wireless communications connection with the sensor while the wireless communications connection is established;
• processing signal strength values corresponding to the sensor when the sensor has been disconnected from the computing device so as to determine that the sensor has been disconnected from the computing device due to a distance increase between the person and the computing device, wherein the determination that the sensor has been disconnected from the computing device due to the distance increase between the person and the computing device is based on determining that:
• a difference between a first signal strength value measured at a first time instant and a second signal strength value measured at a second time instant is greater than or equal to a predetermined minimum signal strength drop threshold, the second time instant being after the first time instant, and the second signal strength value being less than the first signal strength value,
• a time elapsed between the first time instant and the second time instant is less than or equal to a predetermined maximum signal drop time threshold, and
• a time elapsed between the second time instant and disconnection between the computing device and the sensor is less than or equal to a predetermined maximum disconnection time threshold;
• and
• providing or commanding provision of at least one user perceptible signal when the computing device has determined that the sensor has been disconnected from the computing device due to the distance increase between the person and the computing device.