Running parameters detection system for treadmills and detection method thereof

A running parameters detection system for treadmills, comprising:

• a treadmill, including a running belt, a motor and an electronic circuit device electrically connected to the running belt and the motor, the electronic circuit device having:
• one or more sensors, used to detect running change data generated by a user running on the running belt, wherein the one or more sensors includes a current sensor electrically connected to the motor thereby detecting motor current data generated by the motor when the user is running on the running belt, the running change data including the motor current data;
• a speed recorder, used for detecting and recording a running belt operation speed data from the running belt of the treadmill;
• a central processing electronic circuit assembly, connected to the one or more sensors and the speed recorder and able to receive the running change data and the running belt operation speed data, wherein the central processing electronic circuit assembly internally includes:
• a touchdown recording unit, used to define the lowest point of each cycle in the running change data as a corresponding touchdown moment recording point;
• a stride frequency calculation unit, connected to the touchdown recording unit and able to determine stride frequency data based on a number of the corresponding touchdown moment recording points recorded within a fixed duration of time;
• a stride length calculation unit, connected to the touchdown recording unit and is used to determine stride length data based on the time between each consecutive two touchdown moment recording points and the running belt operation speed data;
• and
• an off-ground recording unit, used to identify at least a current chatter starting point before each touchdown moment recording point of each cycle in the motor current data to calculate a time point as an off-ground moment recording point;
• a transmission electronic circuit assembly, connected to the central processing electronic circuit assembly so as to transmit the data obtained from the calculations completed by the central processing electronic circuit assembly;
• and
• an electronic carrier, connected to the electronic circuit device thereby receiving data calculated by the central processing electronic circuit assembly of the treadmill.