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Method and system for shot tracking

  • US 7,800,480 B1
  • Filed: 05/12/2010
  • Issued: 09/21/2010
  • Est. Priority Date: 05/12/2010
  • Status: Active Grant
First Claim
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1. A method for transmitting a RFID signal while conserving the battery power for a circuit in continuous operation, the method comprising:

  • activating a microprocessor from a sleep mode to a sampling mode, the microprocessor in electrical communication with a multi-axis accelerometer, a radiofrequency component, and a battery having no more than 225 milliamp hours of power;

    activating the multi-axis accelerometer to determine movement during the sampling mode, the power for the multi-axis accelerometer drawn from the battery;

    determining with the multi-axis accelerometer if there is movement during an analysis mode;

    monitoring movement with the multi-axis accelerometer during a monitoring mode and communicating the movement to the microprocessor; and

    transmitting a signal from the radiofrequency component during a transmission mode, the signal comprising data related to the movement monitored by the multi-axis accelerometer, the radiofrequency component operating at 2.4 giga-Hertz, the power for the radiofrequency component drawn from the battery;

    wherein the circuit is in continuous operation;

    wherein the circuit consumes less than 600 nano-amps during the sleep mode, the sleep mode having a time period ranging from 10 seconds to 30 seconds;

    wherein the circuit consumes less than 15 micro-amps during the sampling mode;

    wherein the circuit consumes less than 50 micro-amps during the analysis mode;

    wherein the circuit consumes less than 200 micro-amps during the monitoring mode; and

    wherein the circuit consumes less than 12 milli-amps during the transmission mode.

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