Abstract: A system includes a frame, and an image processing unit, a laser unit and an adjusting unit that are mounted on the frame. The image processing unit includes an image capturing device and a processor. The image capturing device captures an image of a body part. The processor generates a control signal based on the image. The laser unit includes a light source and an optical component. The light source emits a laser beam. The adjusting unit is connected to the processor, and interconnects the optical component and the frame. The adjusting unit receives the control signal, and orients, based on the control signal, the optical component to direct the laser beam to acupuncture points on the body part individually.

Abstract: The present invention provides a surgical smoke removing device, which includes a smoke removing apparatus adapted to be connected to an application apparatus. The smoke removing apparatus includes an air cleaner, a stage, and a controller. The air cleaner has an inlet to suck in air, and an outlet to blow out clean air. The stage is configured to move the outlet of the air cleaner, such that the outlet targets at an emission source and/or a breathing zone of a user. The controller is connected to the air cleaner and the stage.

Abstract: A method of calculating a step length of a user, which comprises the steps: input a leg length of the user; obtain a vertical acceleration when the user is walking, wherein the vertical acceleration is sensed by an accelerometer and then removed the effect of gravity; do double integral on the vertical acceleration to obtain a vertical displacement for one step of the user; calculate a step length according to the vertical displacement and the leg length by applying Pythagorean theorem.