Detection apparatus of a traning machine

Abstract

A detection apparatus of a training machine has a shifting device, four sensors and a controller. The shifting device is mounted on an exercise device along a circular motion trace divided into four segments. The four sensors are respectively mounted on the body and correspond to the four segments. The controller determines multiple exercise states, including the rotation speed, the rotational direction, the first rotation speed, the second rotation speed and the force exerted on the exercise device, according to detecting signals from the sensors at a same time. The structure of the detection apparatus is simplified for ease of use.

What is claimed is: 
     
         1 . A detection apparatus of a training machine having a body and an exercise device, the detection apparatus comprising:
 a shifting device mounted on the exercise device and movable along a circular motion trace, wherein the circular motion trace is divided into a first segment, a second segment, a third segment and a fourth segment;   four sensors mounted on the body and respectively corresponding to the four segments, wherein each sensor generates a detecting signal when the sensor detects the shifting device; and   a controller electrically connected to the sensors to receive the detecting signals, so as to calculate a first time duration (T1), a second time duration (T2), a third time duration (T3) and a fourth time duration (T4), to calculate a rotation speed (RPM), to determine a rotational direction of the exercise device according to a sequence of the detecting signals, to determine a first rotation speed (RPML) and a second rotation speed (RPMR), and to determine a force exerted on the exercise by a user according to the time durations, wherein   T1 is a duration of time for the shifting device to pass through the first segment;   T2 is a duration of time for the shifting device to pass through the second segment;   T3 is a duration of time for the shifting device to pass through the third segment;   T4 is a duration of time for the shifting device to pass through the fourth segment;   the rotation speed (RPM) is 60/T, T=T1+T2+T3+T4;   the first rotation speed (RPML) is 60/(T1+T2); and   the second rotation speed (RPMR) is 60/(T3+T4).   
     
     
         2 . The detection apparatus as claimed in  claim 1 , wherein
 when the controller sequentially receives the detecting signals in a forward sequence, the controller determines that the exercise device rotates along a first rotational direction; and   when the controller sequentially receives the detecting signals in a backward sequence, the controller determines that the exercise device rotates along a second rotational direction in reverse to the first rotational direction.   
     
     
         3 . The detection apparatus as claimed in  claim 1  further comprises multiple sensors mounted on the body, such that the four segments comprise different numbers of sensors. 
     
     
         4 . The detection apparatus as claimed in  claim 2  further comprises multiple sensors mounted on the body, such that the four segments comprise different numbers of sensors. 
     
     
         5 . The detection apparatus as claimed in  claim 2 , wherein
 the first rotational direction is a clockwise direction; and   the second rotational direction is a counterclockwise direction.   
     
     
         6 . The detection apparatus as claimed in  claim 5  further comprises multiple sensors mounted on the body, such that the four segments comprise different numbers of sensors.