Intelligent sport shoe system
The present invention is directed to a system for providing information to an athlete concerning the efficiency with which the athlete is using energy in moving relative to the ground or some other surface. In one embodiment, the system includes a plurality of pressure sensors that are associated with a shoe and generate pressure related data. The system further includes a processing system that processes the pressure data produced by the sensors to determine energy efficiency related information and make this information available to the wearer of the shoe so that the wearer can, if needed or desired, takes steps to improve their energy efficiency.
1. A system for providing an athlete with energy related information comprising:
a shoe with a plurality of pressure sensors located between the space to be occupied by a wearer's foot and the ground when the shoe is in use, each of the pressure sensors capable of producing an analog electrical signal indicative of the pressure being applied to the sensor;
a processing system for processing the analog electrical signals output by the plurality of sensors to provide information related to the wearer's energy efficiency, the processing system comprising:
analog-to-digital convertor for converting the analog electrical signals produced by the plurality of sensors into digital electrical signals at a predetermined sampling rate;
a processor for processing the digital electrical signals to produce energy efficiency related information; and
a display for providing a visual display of the energy efficiency related information;
wherein the processor is adapted to process the digital signals to identify, with respect to a period of time during which the shoe is in contact with the ground or other surface, the start of the landing phase, the end of the landing phase and start of the launching phase, and the end of the launching phase.
2. A system, as claimed in claim 1 , wherein the processor comprises:
a first processor that is operatively attached to the shoe and adapted to receive the digital signals produced by the analog-to-digital converter and produce a wireless signal that includes the received digital signals; and
a second processor that is spaced from the shoe and adapted to receive the wireless signal produced by the first processor.
3. A system, as claimed in claim 1 , wherein the processor comprises:
a first processor that is operatively attached to the shoe and adapted to receive the digital signals produced by the analog-to-digital converter, process the received digital signals to produce energy efficiency related information, and produce a wireless signal that includes the energy efficiency related information; and
a second processor that is spaced from the shoe and adapted to receive the wireless signal produced by the first processor.
4. A system, as claimed in claim 1 , wherein:
the processor is adapted to identify a portion of the digital signals that are associated with a stationary power offset of the sensors.
5. A system, as claimed in claim 4 , wherein:
the processor is adapted to use the digital signals during each sampling period of the landing phase to determine a dynamic power value for each sampling period during the landing phase.
6. A system, as claimed in claim 5 , wherein:
the processor is adapted to use the stationary power offset and the dynamic power value for each sampling period during the landing phase to determine the real power value for each sampling period during the landing phase.
7. A system, as claimed in claim 6 , wherein:
the processor is adapted to integrate the real power value for each sampling period during the landing phase over the duration of the landing phase to determine energy lost during the landing phase.
8. A system, as claimed in claim 4 , wherein:
the processor is adapted to use the digital signals during each sampling period of the launching phase to determine a dynamic power value for each sampling period during the launching phase.
9. A system, as claimed in claim 8 , wherein:
the processor is adapted to use the stationary power offset and the dynamic power value for each sampling period during the launching phase to determine the real power value for each sampling period during the launching phase.
10. A system, as claimed in claim 9 , wherein:
the processor is adapted to integrate the real power value for each sampling period during the launching phase over the duration of the launching phase to determine energy delivered during the launching phase.
11. A system, as claimed in claim 7 or 10 , wherein:
the processor is adapted to use the energy delivered and the energy lost to determine one of: useful energy that contributes to the desired motion and energy efficiency.