42results about How to "Does not affect the experimental results" patented technology

The present invention disclosed a large -scale lifting and uniform flat plate electrode system and its method. This device includes: insulators, middle frames, steel wire ropes, flat plate electrodes, guided pulleys, tablet electrode lifting subsystems, power supply system;At the top, the other end is solid to the middle frame, the middle frame is fixed with the wire rope, and the wire rope passes through the tidal electrode -to -top -linked guide pulley, and it is solid with the tablet electrode lifting subsystem.The present invention can realize the automatic lifting of the large tablet electrode system, which can improve the efficiency of lightning experiments and ensure the safety of experiments.

An interactive training platform based on real PLC and computer virtual elevator components, including PLC, computer, single-chip microcomputer signal conversion transceiver module, training junction box; the computer is installed with PLC program development software, and virtual control training component units, virtual Elevator installation unit, virtual elevator running diagram unit software; the platform edits and runs the elevator program on the real PLC, and other elevator components are virtualized on the computer. The virtual components have the same position, status, and connection properties with the PLC terminals as the real ones; single-chip microcomputer signals The conversion transceiver module is connected with the computer and the PLC, so that the PLC terminal signal is synchronized with the status of the virtual elevator components; the training junction box has connection terminals, which correspond to the control terminals of the virtual elevator components, and can be used for PLC control wiring training. The platform can carry out PLC programming, and use virtual elevator components to simulate elevator operation, and complete various scheduled training projects. It has the advantages of small equipment investment and small equipment footprint.

The present invention relates to a large-space full-scale fire site simulation experiment control system and its method. Data acquisition and processing system, altitude marking and image acquisition system, mobile power supply and control host; the mobile power supply and simulated fire source and convection smoke system, temperature data acquisition and processing system, wind speed data acquisition and processing system, altitude marking and image acquisition system It is connected with each other and supplies power to the above systems; the control host has built-in data acquisition sub-module, data storage sub-module and UI display sub-module to realize on-site data processing and control functions. The invention adopts 1‑WIRE bus mode to network the sensors, which has the characteristics of simple and convenient wiring and flexible disassembly, and its transmission data is stable. At the same time, it adopts the flue gas generating device with double-sided air intake to avoid single-sided air intake to heat Smoke has interference problems.

The invention discloses a steroid environment endocrine disturbing chemicals hydroxyl group / keto group synchronous derivatization method of steroid environment endocrine disturbing chemicals (oestrone, 17 beta-estradiol, 17 alpha-ethinyl estradiol, estriol and progesterone). The method comprises the following steps: first fetching standard mixed solution containing the steroid environment endocrine disturbing chemicals and internal standard and introducing high-purity nitrogen at normal temperature so as to dry the standard mixed solution; and adding derivatization reagent prepared from N-methyl-N-trimethylsilyl trifluoroacetamide, iodotrimethylsilane and dithiothreitol based on a proportion of 1,000 muL:5 to 10 muL:5 mg and reacting at 20 to 60 DEG C for 5 to 10 min so as to obtain the derivatization product shown in figure. The method has the advantages of simple and time-saving operation, low energy consumption and cost and the like. The hydroxyl group and the keto group can be derivatized synchronously, the linear correlation among the derivatization products is good, and the detection limit of instrument can reach 0.01 to 1 pg / mu L. The method can be used for the GC-MS detection of the steroid environment endocrine disturbing chemicals in samples such as water, bottom sediment, organisms and the like.