Abstract: Disclosed are a lateral silicon carbide junction gate field effect transistor (SiC-JFET) device and a manufacturing method thereof. The lateral SiC-JFET device includes a base; a source and a drift region formed on the base in sequence; a first source contact region, a second source contact region, and a channel region formed on the source in sequence; and a gate formed on the channel region; where the channel region and the drift region are independent structures respectively. The embodiments of the present disclosure solved the technical problem that the adjustment of the breakdown voltage of the conventional lateral SiC-JFET device is limited by the size of the channel region.

Abstract: A heavy metal detector includes a housing composed of a top cover and a base, and a main machine and an electrolysis module arranged in the housing, wherein the main machine includes a main machine circuit, and the main machine circuit includes a main controller, a power supply module, a signal acquisition and processing module, an electrolysis module interface and a signal conversion module. The electrolysis module interface is configured to connect the electrolysis module and the signal acquisition and processing module; the signal acquisition and processing module is configured to receive a characteristic electrical signal output by the electrolysis module, and output a detection result to the main controller; and the main controller displays the detection result on a display module. Multiple electrolysis module interfaces are provided. The base is provided with a plurality of electrolysis module installation ports and stirring devices corresponding to the electrolysis module installation ports.

Abstract: The present invention relates to a on-board TV on railway vehicle that is mounted on a ceiling of a passenger cart, the on-board TV comprises a video display, a triangle support frame and cover plates, where the video display is assembled on the triangular support frame, the cover plates are mounted at two sides of the video display; a mount board is provided in the video display, a circuit board is mounted on one side of the mount board and a display screen is mounted on the other side of the mount board; a power supply/signal input board, an LED control board and a backlight high voltage transformer are provided on the circuit board. The present invention has a simple and reasonable structure, high reliability, an appealing appearance, and practicality; the video display is mounted on the triangular support frame, such that the display inclines downwards a certain angle to satisfy the watching angle of passengers, and meanwhile the video display is compatible and exchangeable.