52results about How to "Reduce protection requirements" patented technology

The invention belongs to the field of gun correction and provides a universal multispectral zero correction instrument for guns. The universal multispectral zero correction instrument is characterized in that a division assembly is arranged on a lens cone assembly and comprises a thermal radiation source light source, a multispectral division plate, a division plate movement micrometer mechanism and a displacement displayer. The universal multispectral zero correction instrument for guns can perform multispectral universal correction and perform firing practice zero correction without special shoot ranges in daytime through glimmer and infrared gun sights, therefore, labor intensity of combatant is reduced, security requirements are reduced, correction live ammunition is saved, and quick reaction capability and shoot quality of troops are increased.

The present invention relates to a radiotherapy driving device which includes: shield, source body, radioactive source, source deck, driving device of source deck. The radioactive source is in the source deck inner, the shield and source body have space for containing the source box, the driving device of the source box can be separated installed on down part of the source box, and the source boxis drived to up-and-down movement between the shield and source box. The shield and source box are in the down part of the source body, which can save the shield material, reduce the whole device weight and occupied space; the driving device of the source box can be separated drive the source box up-and-down movement when treating, the source box is fixed on radiation device of the radiotherapy system by lock board, and rotary irradiate with the radiation device. The radiotherapy driving device reduces protective request of the radiation device, prevents motor block of the source box efficiently, simplifies the radiotherapy system structure, reduces processing difficuites and saves cost.

The invention discloses a real time detection device which belongs to the technical field of gas-solid phase flow detection and relates to the coal powder concentration and phase distribution in a pneumatic transmission pipeline. A sensor composite pipe section of the detection device is connected with a technical pipeline to be detected by a flange and a gasket seal. A spotted gamma source of the sensor is arranged on an axial line of the sensor composite pipe section. The gamma ray emergence angle of a gamma source collimator is 360 degrees plane emergence angle, and the emergence plane is vertical with the axial line of the sensor composite pipe section. A gamma ray detector consists of n independent ionization chambers of respectively-matched electrometers which form an annular ionization chamber array coaxial with a sensing and measuring pipe section. The detection device ensures that the influence of gas-solid phase flow pattern and phase distribution on the measurement of volume concentration can be reduced to the extent that can be neglected; radioactivity activity of required gamma ray source is reduced by times under the precondition of the same measurement precision; the field space occupied by a measuring device is reduced obviously; the cost is reduced obviously; the radiation protection range is reduced obviously; and gamma ray protection requirement and difficulty are reduced greatly.

The invention discloses a method for recognizing touch points by using a surface acoustic wave touch screen. The method comprises the following steps of: based on a back wave positioning principle, reflecting a surface acoustic wave transmitted by a transducer when the surface acoustic wave meets a reflector (or a touch body), and calculating to obtain a distance between the touch body and the transducer by measuring time elapsed after the surface acoustic wave is transmitted by the transducer, reflected by the touch body and then is reflected back to the same transducer, according to a propagation velocity of the acoustic wave, thereby locating the touch body. According to the requirements of a touch system, different numbers of transducers can be configured so that one-dimensional and two-dimensional coordinate positioning of a single or / and multiple touch bodies is realized.

The invention discloses a new energy-saving environment-friendly technology for meta-amide polymerization. The technology comprises the following steps: by adopting dry liquid ammonia, neutralizing the product after pre-polymerizing m-phenylenediamine and m-phthaloyl chloride and then firstly filtering under airtight or inert gas shielding condition; dissolving the acquired filter residue by using a solvent and then secondarily filtering under airtight or inert gas shielding condition; and recycling the filtrate and using for polymerizing in the next period, wherein the m-phenylenediamine and m-phthaloyl chloride are pre-polymerized under the inert gas shielding condition. The new energy-saving environment-friendly technology has the advantages that the overall energy consumption of the technology is reduced, especially, the environmental pollution is reduced, the serious economical burden and resource waste caused by the DMAc and polymer which are not recycled in the prior art are reduced and the defects of large energy consumption and equipment corrosion and influence on the quality of the recycled DMAc caused by the acid gas generated by the DMAc which is locally recycled in the manner of vacuum drying and is easy to decompose under high temperature are overcome.

Belonging to the technical field of oil based drilling fluid of petroleum drilling, the invention relates to an oil based emulsified drilling fluid with an ultralow oil-water ratio of 40:60. The raw materials include: 40 parts of 3# white oil, 60 parts of 30% calcium chloride brine, 2-5 parts of an efficient emulsifier, 1-3 parts of an emulsifying stabilizer, 1-3.0 parts of a filtrate reducer, 1-5 parts of lime, and 20-50 parts of barite. The preparation method includes: putting the components into a 10000rpm high speed mixer according to the arrangement order, conducting stirring for 5min after putting a component raw material, and when all the component raw materials are added and mixed well, further conducting high speed stirring for 60min under normal temperature and pressure, thus obtaining the product. The oil based emulsified drilling fluid provided by the invention has good emulsifying stability, cuttings carrying capacity and well wall stability, thus being able to greatly reduce the oil based emulsified drilling fluid preparation and petroleum and natural gas drilling cost. The oil based emulsified drilling fluid solves the problems of great viscosity effect, poor rheological properties and difficult regulation of filtration loss in existing oil based drilling fluid with low oil-water ratio.

The invention relates to a display adjustment method for adjusting the thrust line of an unmanned aerial vehicle booster rocket and an adjustment device used in the adjustment method. The thrust line display adjustment device of the UAV booster rocket has a frame, a front support column is arranged at the front end of the frame, and a rear support column is provided at the rear end; the number of the rear support columns is a pair, which are respectively located on two sides of the frame side; at the rear end of the frame, a matrix adjustment grid is arranged behind the rear support column, and the matrix adjustment grid is horizontal to the ground; on the matrix adjustment grid, a plurality of grids of rectangular arrays or honeycomb arrays are arranged. The grid is used to display different coordinate parameters; the matrix adjustment grid is matched with a rocket simulator, the size of the rocket simulator and the real booster rocket, and a laser transmitter is set at the tail end of the rocket simulator. The beam direction coincides with the thrust direction of the booster rocket, and the rocket simulator is installed on the push seat provided on the belly of the UAV.

Arefrigerant for heat pump of high-temp water source is prepared from monochloroe-1,2,2,2-tetrafluoroethane (HCFC-124), 1-monochloro-1,1-diffluoroethane (HCFC-1426) and optional isobutyane (HC-600a) through proportional pysical mixing. Its advantages include no damage to ozonosphere, no poison, imbustible nature, and high thermodynamic performance. It can directly use freon-22 refrigerating system and need not to change the compressor and main parts in the system.