3results about How to "Precise operation control" patented technology

The utility model provides a control device for vehicle testing and a vehicle testing system. The control device comprises a circuit break control circuit and a second semiconductor switch circuit; the circuit break control circuit comprises a first semiconductor switch circuit and a circuit break switch, the enable end of the first semiconductor switch circuit is connected with a circuit break control signal, the first end is connected with a voltage signal, the second end is connected with the circuit break switch, and the circuit break switch is arranged in a test circuit of a vehicle test. The enabling end of the second semiconductor switch circuit is connected with a short-circuit control signal, the first end is connected with a vehicle test circuit, and the second end is connected with the power end of the test circuit. When the circuit break control signal is an enable signal, the first semiconductor switch circuit enables the circuit break switch to be disconnected, so that the test circuit is disconnected; and when the short circuit control signal is an enable signal, the first end and the second end of the second semiconductor switch circuit are conducted, so that the power supply end is short-circuited. Compared with a traditional relay, the size can be effectively reduced, and the weight is reduced.

The utility model relates to aluminium composite board hot rolling technical field, and disclose an aluminium composite board hot rolling compound device, including outer machine case, the front and rear of outer machine case are thorough, and the inside bottom of outer machine case is installed with a plurality of lower roll from front to back in proper order, and the upper roller is provided in the just above of each lower roll, and the inside top of outer machine case is installed with a plurality of respectively connecting each upper roller's down pressure spare from front to back in proper order, and the down pressure spare is by front and rear down pressure force and gradually increases in proper order, and down pressure spare specifically includes mounting bracket, lifting platform, electric hydraulic cylinder and compression spring, and mounting bracket is as upper roller mounting structure, and electric hydraulic cylinder is installed in the top of outer machine case, and lifting platform is docked in the end of electric hydraulic cylinder piston rod, and compression spring has three corresponding installation in the left and right ends and the center position between mounting bracket and susong house lifting platform. Hot rolling compound device adopts the hot rolling technology of step by step increasing pressure through the innovative design, and effectively improves the deficiency of traditional single pressure hot rolling.

The utility model discloses a bottom blowing refining system of an industrial silicon submerged arc furnace, which comprises a low-temperature liquid gas storage tank which is provided with a valve and an instrument for complete operation and can realize in-out of liquid and on-site monitoring and control of pressure and liquid level; the inlet end of the air temperature type vaporizer is connected with the low-temperature liquid gas storage tank; a buffer tank; an air compressor; a first air inlet pipe on one side of the proportioning adjusting cabinet is connected with the outlet end of the air temperature type vaporizer, a second air inlet pipe is connected with the air compressor, a pipeline on the other side of the proportioning adjusting cabinet is connected with the buffer tank, and a mixed gas pipeline on the proportioning adjusting cabinet is connected with the iron ladle through a header pipe.