A detecting device for the leaking ratio of the accelerator includes the detector and the rotated frame which is made up of the two symmetrical frames and the drive gear. The mounting hole to fix the detector is set on the wall surface of every frame. The drive gear is made up of the basement, the horizontal-rolledposition institution and the reciprocated institution. The electric engine one is connected with the input of the makeshift driving chain one by the reducer which the output end is connected to the chassis of the reciprocated institution to drive the reciprocated institution. The electric engine two makes the lead screw rotate by the makeshift driving chain two which is connected to the bilateral connection board by the matched inner nut. The connection board limited by guide track to move reciprocally relative to the lead screw is connected to the frame. The invention can determine the position of every monitoring point to improve the accurate ratio and control the detection in a far distance. |