Patent ID: 11938366
Assignee: nan
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 2:
3. The free weight training protection device of claim 1, wherein the controller comprises a left counter and a right counter, and each of the motors further comprises a rotary encoder;
wherein, when the controller executes the two barbell position calculation programs, the controller uses the left counter and the right counter to respectively count a number of pulses of the rotary encoder of the two motors, wherein when the each of the motors rotate rotates in a forward direction, the corresponding counter counts up the number of pulses, and wherein when each of the motors rotate rotates in a reverse direction, the corresponding counter counts down the number of pulses;
wherein, each position data of the two plate-collars is equal to a recorded value of the number of pulses of the corresponding counter times a height of the corresponding center post, and then divided by a corresponding position calibration value; wherein after the free weight training protection device is powered on, the controller immediately starts the two barbell position calculation programs and maintains the operation of the two barbell position calculation programs.