Signal analysis and recharging system
A measurement device may include one or more piezoelectric elements that output power signals. The device may split each power signal, analyzing a first portion of the signal while supplying a second portion to an energy storage assembly. A processor may dynamically adjust the first and second portions of each power signal to change how much of each power signal is used for signal processing versus energy storage, and may make the adjustments based on detected activities and/or pre-programmed timelines. The device may be used in or on sports equipment, such as a golf club.
1. A golf club impact analysis system, including:
a first piezoelectric element embedded in a club face of a golf club;
a first signal divider that receives a first power signal that is output from the first piezoelectric element based on both impact of the golf club with an object and vibrations, the first signal divider having a first output and a second output, wherein the first output is coupled to signal processing circuitry and the second output is coupled to an energy storage assembly that includes a battery; and
a processor that is configured to dynamically adjust a ratio of a first amount of the first power signal the first signal divider sends through the first output to the signal processing circuitry versus a second amount of the first power signal the first signal divider sends through the second output to the energy storage assembly, wherein the processor is further configured to perform impact analysis of the impact of the golf club with the object.
2. The golf club impact analysis system of claim 1 , wherein the processor is further configured to:
detect a threshold level of acceleration has been met; and
in response to the threshold being met, adjust the ratio so that more of the first power signal is sent through the first output to the signal processing circuitry.
3. The golf club impact analysis system of claim 2 , wherein in response to the threshold being met, the processor is further configured to dynamically increase a sampling rate of the signal processing circuitry.
4. The golf club impact analysis system of claim 1 , wherein the processor is further configured to detect the impact and waits a predetermined time from impact before dynamically changing the ratio to send more of the first power signal through the second output to the energy storage assembly.
5. The golf club impact analysis system of claim 4 , wherein the dynamic change to the ratio causes the processor to send all of the power signal through the second output to the energy storage assembly.
6. The golf club impact analysis system of claim 1 , wherein the first piezoelectric element measures a combination of parameters that include pressure, linear acceleration, angular acceleration, and torque; and
wherein the first power signal is an analog signal based on surface charge changes of the first piezoelectric element.
7. The golf club impact analysis system of claim 1 , further including a second piezoelectric element that outputs a second power signal to a second signal divider, wherein the second signal divider splits the second power signal according to the same dynamically adjustable ratio as the first signal divider, including a first amount and second amount of the second power signal.
8. The golf club impact analysis system of claim 7 , wherein the processor is further configured to set first and second multipliers for normalizing samples of the first and second power signals respectively, wherein the second multiplier is set differently than the first multiplier to compensate for the second piezoelectric element being closer to an edge of a monolith than the first piezoelectric element.
9. The golf club impact analysis system of claim 8 , wherein the signal processing circuitry simultaneously samples the respective first amounts of the first and second power signals.
10. The golf club impact analysis system of claim 1 , wherein the processor is further configured to set a multiplier for normalizing samples taken by the signal processing circuitry, wherein the multiplier is dynamically changed to compensate for dynamic changes to the first amount.
11. The golf club impact analysis system of claim 1 , wherein the processor is further configured to track the first and second amounts as they change over time.
12. The golf club impact analysis system of claim 1 , wherein the processor is further configured to dynamically change the ratio of the first and second amounts based on a pre-programmed time line that is based on at least one trigger event.
13. A golf club head including:
a first pressure sensor embedded in a side wall of the club head;
a first signal divider that receives a first power signal that is output from the first pressure sensor based on both impact of the golf club head with an object and vibrations, the first signal divider having a first output and a second output, wherein the first output is coupled to signal processing circuitry and the second output is coupled to an energy storage assembly that includes a battery; and
a processor that is configured to dynamically adjust a ratio of how much of the first power signal the signal divider sends through the first output to the signal processing circuitry versus how much of the first power signal the signal divider sends through the second output to the energy storage assembly, wherein the processor is further configured to perform impact analysis of the impact of the golf club head with the object.
14. The golf club head of claim 13 , further including a second pressure sensor that outputs a second power signal, wherein a portion of the second power signal is sent to the energy storage assembly in accordance with the ratio set by the processor.
15. The golf club head of claim 14 , wherein the processor is further configured to set first and second multipliers for normalizing samples of the first and second power signals respectively, wherein the second multiplier is set differently than the first multiplier to compensate for the second pressure sensor being closer to an edge of a golf club head than the first pressure sensor.
16. The golf club head of claim 13 , wherein the processor is further configured to cause substantially all of the first power signal to be sent to the energy storage assembly until the processor enters an impact analysis state.
17. The golf club head of claim 16 , wherein in the impact analysis state, the processor is further configured to cause substantially all of the first power signal to be sent to the signal processing circuitry.
18. A device that attaches to a shaft of a golf club, including:
a first pressure sensor embedded in a wall that makes contact with the shaft;
a first signal divider that receives a first power signal that is output from the first pressure sensor based on both impact of the golf club with an object and vibrations, the first signal divider having a first output and a second output, wherein the first output is coupled to signal processing circuitry and the second output is coupled to an energy storage assembly that includes a battery; and
a processor that is configured to dynamically adjust how much of the first power signal the first signal divider sends through the first output to the signal processing circuitry versus how much of the first power signal the first signal divider sends through the second output to the energy storage assembly, wherein the dynamic adjustment is made automatically by the processor, and wherein the processor is further configured to perform impact analysis of the golf club with the object.