Abstract: A method produces tantalum powder. The method includes: (1) uniformly mixing a tantalum powder raw material, metal magnesium and at least one alkali metal and/or alkaline earth metal halide, loading the mixture into a container, and putting the container in a furnace; (2) raising the temperature of the furnace to 600-1200° C. in the presence of inert gas, and soaking; (3) at the end of soaking, lowering the temperature of the furnace to 600-800° C., vacuumizing the interior of the furnace to 10 Pa or less, soaking under the negative pressure so that the excessive metal is separated; (4) thereafter, raising the temperature of the furnace to 750-1200° C. in the presence of inert gas, and soaking so that the tantalum powder is sintered in the molten salt after oxygen reduction; (5) then cooling to room temperature and passivating to obtain a mixed material containing halide and tantalum powder; and (6) separating the tantalum powder from the resulting mixture.

Abstract: A low-carbon, high-purity tantalum pentoxide powder has a carbon content of no greater than 15 ppm. A preparation method for the powder includes: (1) adding a fluotantalic acid (H2TaF7) solution into a reaction kettle, controlling the temperature of the reaction kettle at 30-60° C., adding a precipitator until the pH of the reaction solution is 8-10, then stopping introducing ammonia, and aging to obtain a tantalum hydroxide slurry; (2) filtering and washing the slurry obtained in step (1), and then carrying out solid-liquid separation to obtain a tantalum hydroxide filter cake; (3) drying the filter cake obtained in step (2) to obtain white tantalum hydroxide powder; (4) calcining the tantalum hydroxide powder obtained in step (3), crushing and screening the calcined sample to obtain tantalum pentoxide powder; and (5) subjecting the tantalum pentoxide powder obtained in step (4) to heat treatment at a temperature of 1000-1500° C. to obtain the powder.

Abstract: The present invention provides a communication system comprising a host computer, control cabinets and peripheral devices, the control cabinets comprising serial ports used for communication among the peripheral devices and the host computer. The operating period of the communication system includes a polling phase and a free communication phase, in the polling phase the host computer sends query instructions to the control cabinets through the serial ports on each of the control cabinets, and in the free communication phase the control cabinets communicate with corresponding peripheral devices through the serial ports. The present invention also provides a communication method for the communication system. Using the communication system of the present invention, reliability of communication among the control cabinets, the host computer and the peripheral devices through a same serial port can be ensured without increasing hardware volume and costs of the communication system.

Abstract: Embodiments of the disclosure provide a display apparatus, a display apparatus fault analysis system and a display apparatus fault analysis method. The display apparatus fault analysis system comprises a display apparatus and a server. The display apparatus comprises: a display chip configured to generate a target video or a target image according to a display instruction; an image capturer configured to capture the target image; a detection unit configured to, upon receipt of a fault detection instruction, send the display instruction to the display chip, compare the target image frame or the target image with a predetermined reference image to obtain a difference between the target image frame or the target image and the predetermined reference image, and generate a fault code based on the difference; and a communication module configured to transmit the fault code to a server.

Abstract: Embodiments of the disclosure provide a display apparatus, a display apparatus fault analysis system and a display apparatus fault analysis method. The display apparatus fault analysis system comprises a display apparatus and a server. The display apparatus comprises: a display chip configured to generate a target video or a target image according to a display instruction; an image capturer configured to capture the target image; a detection unit configured to, upon receipt of a fault detection instruction, send the display instruction to the display chip, compare the target image frame or the target image with a predetermined reference image to obtain a difference between the target image frame or the target image and the predetermined reference image, and generate a fault code based on the difference; and a communication module configured to transmit the fault code to a server.

Abstract: The present invention provides a communication system comprising a host computer, control cabinets and peripheral devices, the control cabinets comprising serial ports used for communication among the peripheral devices and the host computer. The operating period of the communication system includes a polling phase and a free communication phase, in the polling phase the host computer sends query instructions to the control cabinets through the serial ports on each of the control cabinets, and in the free communication phase the control cabinets communicate with corresponding peripheral devices through the serial ports. The present invention also provides a communication method for the communication system. Using the communication system of the present invention, reliability of communication among the control cabinets, the host computer and the peripheral devices through a same serial port can be ensured without increasing hardware volume and costs of the communication system.

Abstract: The present invention provided a fault detection method comprising: S31, acquiring the real-time operation status signal of the display device; S32, comparing the real-time operation status signal of the display device with a predetermined operation status signal and determines whether fault occurs in the display device. The present invention provided a fault detection device and a fault detection system. By means of the fault detection method of the present invention, a faulty display can be determined rapidly. Moreover, because of the few bandwidth required for the operation status signals, the network environment requirement for the fault detection device is low, and the costs of the fault detection for the display device can be lowered.