Percussive massage device with force meter
A percussive massage device with a force meter that includes a housing, an electrical source, a motor positioned in the housing, a switch for activating the motor, and a controller configured to obtain a voltage of the motor, generate a lookup table correlating voltage to force applied by the percussive massage device, and display a force magnitude corresponding to the obtained voltage using the lookup table.
1. A percussive massage device comprising:
a housing,
an electrical source,
a motor positioned in the housing,
a switch for activating the motor,
an actuated output configured to reciprocate when the motor is activated, and
a controller configured to obtain a voltage of the motor, generate a lookup table correlating voltage to force applied by the percussive massage device, and display a force magnitude corresponding to the obtained voltage using the lookup table, wherein the lookup table is generated by determining a maximum magnitude of force configured to be applied by the percussive massage device, determining a maximum magnitude of voltage configured to be applied to the percussive massage device from a power source, dividing the maximum magnitude of force into equal force increments, and dividing the maximum magnitude of voltage into equal voltage increments.
2. The percussive massage device of claim 1 , wherein the electrical source comprises a battery pack.
3. The percussive massage device of claim 1 , further comprising a display configured to depict an amount of force applied by the percussive massage device.
4. The percussive massage device of claim 3 , wherein the display comprises a series of LEDs.
5. The percussive massage device of claim 1 , further comprising an organic light-emitting diode screen.
6. The percussive massage device of claim 1 , wherein the motor is a brushless direct-current (BLDC) motor.
7. The percussive massage device of claim 6 , further comprising a voltage-sensing resistor electrically coupled to the BLDC motor and the controller.
8. The percussive massage device of claim 1 , wherein the lookup table correlating voltage to force is linear.
9. The percussive massage device of claim 1 , wherein an updated lookup table is generated by obtaining a maximum power source voltage of the percussive massage device, setting the maximum power source voltage to be the maximum magnitude of voltage, and dividing the maximum magnitude of voltage into equal voltage increments to generate a range of voltages, wherein the updated lookup table correlates voltage to force applied by the percussive massage device corresponding to the range of voltages determined by the maximum power source voltage.
10. The percussive massage device of claim 9 , wherein a calibrated force magnitude corresponding to the maximum power source voltage using the updated lookup table is displayed.
11. The percussive massage device of claim 1 , wherein an updated lookup table is generated by obtaining at least two power source voltages each corresponding to a magnitude of force, wherein the magnitude of force is determined from the displayed force magnitude, and measuring a magnitude of force exerted by the percussive massage device using an external force meter for each of the at least two power source voltages, wherein the updated lookup table correlates voltage to force applied by the percussive massage device corresponding to the measured magnitudes of force.
12. The percussive massage device of claim 11 , wherein a calibrated force magnitude corresponding to the measured magnitudes of force using the updated lookup table is displayed.
13. The percussive massage device of claim 12 , wherein the lookup table is updated for each magnitude of force capable of being displayed on the percussive massage device.
14. A percussive massage device comprising:
housing,
a battery pack,
a motor positioned in the housing,
a switch for activating the motor,
an actuated output configured to reciprocate when the motor is activated, and
a controller configured to obtain a current magnitude of the battery pack of the percussive massage device, obtain a voltage magnitude of the battery pack, determine a power magnitude using the current magnitude and voltage magnitude of the battery pack, generate a lookup table correlating power magnitude to force magnitude applied by the percussive massage device, and display a force magnitude corresponding to the obtained power magnitude using the lookup table.
15. The percussive massage device of claim 14 , wherein the lookup table is generated by determining a maximum power magnitude to be input into the percussive massage device, determining a minimum power magnitude of the percussive massage device when no load is applied to the percussive massage device, determining a maximum force magnitude configured to be applied to the percussive massage device from a power source, dividing the maximum power magnitude into equal power increments, and dividing the maximum force magnitude into equal force increments.
16. The percussive massage device of claim 15 , wherein the number of equal power increments and the number of equal force increments is the same.
17. The percussive massage device of claim 15 , wherein the maximum power magnitude is a maximum effective power magnitude derived from a total effective power.
18. The percussive massage device of claim 15 , wherein the lookup table is updated for each magnitude of force capable of being displayed on the percussive massage device.
19. The percussive massage device of claim 14 , wherein an updated lookup table is generated by determining at least two power magnitudes using current and voltage measurements of the battery pack, each corresponding to a magnitude of force, wherein the magnitude of force is determined from the displayed force magnitude, and measuring a magnitude of force exerted by the percussive massage device using an external force meter for each of the at least two power magnitudes, wherein the updated lookup table correlates power to force applied by the percussive massage device corresponding to the measured magnitudes of force.
20. The percussive massage device of claim 14 , wherein a calibrated force magnitude corresponding to the measured magnitudes of force using the updated lookup table is displayed.