Abstract: An image sleep analysis method and system thereof are disclosed. During sleep duration, a plurality of visible-light images of a body are obtained. Positions of image differences are determined by comparing the visible-light images. A plurality of features of the visible-light images are identified and positions of the features are determined. According to the positions of the image differences and features, the motion intensities of the features are determined. Therefore, a variation of the motion intensities is analyzed and recorded to provide accurate sleep quality.

Abstract: The present ilylltivllj provides-a pneumatic shock absorber fitted with an ancillary air chamber. The miajor fatuire of such know-how is that pneumatic shock absorber is fitted with an ancillary air chamber interconnected to or separated from air chamber of cylinder body. And, a floating piston is mounted into the ancillary air chamber. Based on this imiiovative design when When the extensible axle of pneumatic shock absorber starts to shrink, the effective flexible travel can be extended in tune with the volume change of ancillary air chamber, thereby meeting actual demands of drivers.