Abstract: A data transmission system is disclosed. The data transmission system includes at least one signal processing device, at least one conversion device, at least one antenna device, and at least one flexible printed circuit board. The at least one signal processing device is configured to generate or receive at least one data. The at least one conversion device is configured to transform between the at least one data and an optical signal. The at least one antenna device is configured to obtain the at least one data according to the optical signal, and configured to receive or transmit the at least one data wirelessly. The at least one flexible printed circuit board includes at least one conductive layer and at least one optical waveguide layer. The at least one optical waveguide layer is configured to transmit the optical signal.

Abstract: An exemplary automatic materials sorting device (100) includes an input belt (11) for transporting materials, a materials sorting mechanism (12), and a control system. The materials sorting mechanism is connected to the input belt, and includes two output belts (121, 122). The input belt and the output belts are configured to transport materials. The control system includes two acting mechanisms (14, 15) and a controller (16). The controller is configured to control the acting mechanisms. The acting mechanisms are capable of creating a force to push the materials to the output belts.