Circuit for transmitting a RFID signal
A circuit for transmitting a RFID signal while conserving the battery power for a circuit in continuous operation is disclosed herein. The circuit includes a RFID component, a microprocessor, an accelerometer, a gyroscope and a battery. The battery preferably has no more than 225 milliamp hours of power. The accelerometer is preferably a multiple axis accelerometer. The circuit is preferably utilized with a device for shot tracking.
1. A circuit for transmitting a RFID signal while conserving the battery power for the circuit, the circuit comprising:
a battery having no more than 225 milliamp hours of power
a microprocessor in electrical communication with the battery, the microprocessor operating during a sleep mode, a sampling mode, an analysis mode, a monitoring mode and a transmission mode;
a multi-axis accelerometer for determining movement, monitoring movement and communicating the movement to the microprocessor, the multi-axis accelerometer in electrical communication with the microprocessor, the power for the multi-axis accelerometer drawn from the battery, the multi-axis accelerometer only active during the sampling mode, the analysis mode and the monitoring mode;
a gyroscope in electrical communication with the accelerometer, the gyroscope only activated when triggered by the multi-axis accelerometer;
a radiofrequency component in electrical communication with the microprocessor, the radiofrequency component operating at 2.4 giga-Hertz, the power for the radiofrequency component drawn from the battery, the radiofrequency component only operable during a transmission mode, transmitting a signal from the radiofrequency component during the transmission mode,
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 5 seconds to 45 seconds, the accelerometer deactivated during the sleep mode;
wherein the circuit consumes less than 15 micro-amps during the sampling mode, the microprocessor activating the accelerometer during the sampling mode and the accelerometer determining if there is any movement or change from a last sampling mode;
wherein the circuit consumes less than 50 micro-amps during the analysis mode, the accelerometer determining if there is motion activity during the analysis mode;
wherein the circuit consumes less than 200 micro-amps during the monitoring mode, the accelerometer monitoring the motion activity during the monitoring mode and communicating any motion activity to the microprocessor; and
wherein the circuit consumes less than 12 milli-amps during the transmission mode, the radiofrequency component transmitting a signal during the transmission mode.
2. The circuit according to claim 1 wherein the gyroscope operates at or less than 5 milli-amps.
3. The circuit according to claim 1 wherein the gyroscope is triggered when the multi-axis accelerometer determines there is a backswing.
4. The circuit according to claim 1 wherein the sleep mode has a time period ranging from 10 seconds to 30 seconds.
5. The circuit according to claim 1 wherein the gyroscope is a low-power yaw, pitch and roll digital gyroscope.
6. The circuit according to claim 1 wherein the multi-axis accelerometer is preferably a ultra low-power high-performance 3-axes nano accelerometer.
7. The circuit according to claim 1 wherein the RFID component is a single chip 2.4 gigaHertz transceiver.
8. The circuit according to claim 1 wherein the microprocessor 30 a is preferably a low pin count, small-package, 8-bit microcontroller.
9. The circuit according to claim 1 wherein the battery is a CR2032 lithium battery.
10. The circuit according to claim 1 wherein the signal comprises data related to the motion activity monitored by the accelerometer.
11. A method for transmitting a RFID signal while conserving the battery 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 gyroscope, a radiofrequency component, a radiofrequency component, and a battery having no more than 225 milli-amp 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;
triggering the gyroscope during the monitoring mode;
monitoring movement with the gyroscope during the 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 5 seconds to 45 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.
12. The method according to claim 10 wherein the gyroscope operates at or less than 5 milli-amps.
13. The method according to claim 10 wherein the gyroscope is triggered when the multi-axis accelerometer determines there is a backswing.
14. The method according to claim 10 wherein the sleep mode has a time period ranging from 10 seconds to 30 seconds.
15. The method according to claim 10 wherein the gyroscope is a low-power yaw, pitch and roll digital gyroscope.
16. The method according to claim 10 wherein the multi-axis accelerometer is preferably a ultra low-power high-performance 3-axes nano accelerometer.
17. The method according to claim 10 wherein the RFID component is preferably a single chip 2.4 gigaHertz transceiver.
18. The method according to claim 10 wherein the microprocessor is preferably a low pin count, small package, 8-bit microcontroller.
19. The method according to claim 10 wherein the battery is a CR2032 lithium battery.