Abstract: A movement detection system includes: a movement sensing footwear operable for providing an infrared signal, and for generating and wirelessly transmitting a footwear motion signal that corresponds to acceleration of the movement sensing footwear; an image acquisition module for capturing images that contain the infrared signal; and a data processing device connected electrically to the image acquisition module for receiving the images captured by the image acquisition module, including a wireless receiver module for receiving the footwear motion signal transmitted by the wireless transmitter module, and configured to acquire information corresponding to acceleration of the movement sensing footwear based on the footwear motion signal, and to acquire information corresponding to position of the movement sensing footwear relative to the image acquisition module based on the images captured by the image acquisition module.

Abstract: A water-soluble and non-water-soluble materials separation device has multiple stirring zones and multiple precipitation zones alternately arranged with the multiple stirring zones. Baffles are respectively provided between the stirring zones and the precipitation zones. Guiding plates are respectively and spatially located in the device to guide solution flow to a center of the baffle. Extraction pipes are provided in the precipitation zones so as to allow formation of precipitation to be collected in the concentration zone. The precipitation is collected from a bottom outlet in the collection tank.