5results about How to "Direct control" patented technology

This invention relates to a high-precision data acquisition, processing, and magnetic field drive system, mainly comprising a data acquisition module, a processing module, a magnetic field drive module, a power supply module, and a host computer. The data acquisition module converts external analog signals into digital signals and transmits them to the processing module. The processing module includes a processing unit, a high-stability temperature-controlled crystal oscillator, an external clock signal interface, a DDR chip, Flash memory, a high-speed connector, and a digital power supply module. This module performs digital processing such as filtering and phase-locked loop (PLL) on the signals. The host computer can communicate with the FPGA core processing module via both Ethernet and serial ports to control the bias, amplitude, and frequency of the signals generated by the magnetic field drive module, display the read-back online data, and generate real-time curves. This invention realizes a low-cost, high-precision NMR gyroscope magnetic field control system, achieving high-precision closed-loop control of the NMR gyroscope's magnetic field.

The utility model relates to a station yard kitchen monitoring alarm system, which belongs to the technical field of kitchen safety equipment and comprises a combustible gas detector, a cut-off electromagnetic valve, an explosion-proof fan, an audible and visual alarm and a fire detector alarm control cabinet. The combustible gas detector, the fire detector, the cut-off electromagnetic valve, the explosion-proof fan and the audible and visual alarm are all electrically connected with the alarm control cabinet, the combustible gas detector and the fire detector are both installed in a station kitchen, the cut-off electromagnetic valve is installed at the inlet end of a gas inlet pipeline of the station kitchen, and the audible and visual alarm is installed at the outlet end of a gas outlet pipeline of the station kitchen. An air inlet of the anti-explosion fan is communicated with the station yard kitchen, and an air outlet of the anti-explosion fan is communicated with the outside of the station yard kitchen. The method has the effect of improving the safety of the battlefield kitchen.

The application discloses a kind of application calcium chloride production positive pressure stove and control method, it is related to calcium chloride granulation technical field, including hot blast furnace and granulation tower, hot blast furnace includes burner, hot blast furnace end plate assembly, hot blast furnace shell assembly and hot blast furnace inner shell assembly, wind cooling jacket is formed between hot blast furnace shell assembly and hot blast furnace inner shell assembly, multiple cyclone barrel is arranged in hot blast furnace inner shell assembly, expansion joint is provided at the outlet of hot blast furnace, and the end of expansion joint away from hot blast furnace is connected with heat-resistant pipeline.The application provides a kind of application calcium chloride production positive pressure stove and control method, solves the problem that the equipment failure rate is high, energy consumption is large, and maintenance cost is high in prior art calcium chloride granulation hot blast system due to being equipped with high-temperature fan and high-temperature regulating air valve;Hot blast furnace is provided with wind cooling jacket, multiple cyclone barrel and cyclone sheet, and dilution air passes through wind cooling jacket, and after entering hot blast furnace hearth from hot blast furnace head part stage, is mixed with high-temperature combustion flue gas.

The application provides a control method for island operation of a VSC-HVDC transmission system, which comprises the following steps: during the island operation of the VSC-HVDC transmission system, implementing startup and steady-state operation of a converter in an open-loop control mode in a startup state; when a fault of an AC system is detected, switching the converter from the open-loop control mode to a double closed-loop control mode to limit fault current and suppress interference; in a non-fault state, operating in an adaptive island control mode; or, in the non-fault state, implementing the steady-state operation of the converter in the open-loop control mode. When the AC system fails, the double closed-loop control mode is adopted to limit fault current and suppress interference; and during the island operation, by automatically switching to a mode without inner loop current control, the system can be stabilized because there is no negative resistance caused by delay such as sampling control, and medium-high frequency oscillation caused by introducing a negative resistance component in closed-loop control can be avoided, thus providing a better solution for large-scale new energy access.

The present invention relates to a CT positioning puncture angle guide, comprising an angle adjustment mechanism and a needle clamping mechanism, wherein the angle adjustment mechanism comprises a shell, wherein the outer periphery of the shell is provided with a first guide groove and a second guide groove, wherein a control rod is provided in the first guide groove along which a control rod slides, wherein one end of the control rod passes through the first guide groove and is fixedly connected to a connecting assembly, wherein the connecting assembly rotates relative to the shell, wherein a movable rod and a fixed rod which are parallel to each other and of equal length are also provided on the shell, wherein the movable rod slides along the second guide groove and one end of the movable rod passes through the second guide groove and is fixed to the connecting assembly, wherein one end of the fixed rod is fixed to the shell, and the other ends of the movable rod and the fixed rod are respectively rotatably connected to the two ends of the needle clamping mechanism, and the control rod is arranged in parallel with the needle clamping mechanism. The present invention has a simple structure, realizes cross-layer operation, has high flexibility, is convenient for surgical operation, and improves the accuracy of puncture position.