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562results about How to "Less damage" patented technology

Nuclear power plant non-security-level DCS configuration testing method and system

The invention discloses a nuclear power plant non-security-level DCS configuration testing method and system comprising a virtual DCS platform and a nuclear power station simulating model coupled to the virtual DCS platform. The nuclear power station simulating model is used for, according to a nuclear power unit operation control instruction given by the virtual DCS platform, simulating the operation of a real nuclear power station, acquiring the operating data of the nuclear power unit, and returning the acquired data to the virtual DCS platform. The virtual DCS platform is used for, according to the operating data of the nuclear power unit, computing and analyzing the operating condition of the nuclear power unit in real time, evaluating a difference between an analyzed result and a designed operating condition, determining the correctness and the rationality of DCS configuration logic and parameters, giving corresponding logic modification and parameter optimization, and transplanting and applying a tested and modified result to the DCS configuration of a real nuclear power unit. The nuclear power plant non-security-level DCS configuration testing method and system may reduce the investment cost of the nuclear power station, shorten the construction period of nuclear power engineering, and decrease equipment loss.
Owner:中广核工程有限公司 +1

Motor resolver detection and conditioning circuit and resolver initial position self-detection and self-updating method

The invention discloses a motor resolver detection and conditioning circuit and a resolver initial position self-detection and self-updating method. The method comprises the steps that a motor controller enters a resolver position self-detection and self-updating mode according to a mode selection switching signal; the motor controller controls the alignment of magnetic electrodes, then reads out the absolute angle of an encoder at the moment through a rotary transformer, an encoder chip and a peripheral circuit, uses the absolute angle read out at the moment as the resolver initial angle of the motor, and writes into a software version; and the motor controller reads out the absolute angle of the encoder in real time through the rotary transformer, the encoder chip and the peripheral circuit, and calculates the electrical angle and electrical angle speed of the motor in real time according to the resolver initial angle of the motor in the software version. By adding the resolver position self-detection and self-updating mode, the invention can effectively reduce the resolver position adjustment link in the motor factory test under the premise of the same software version, and can automatically and accurate detect and update the resolver initial angle. The invention can be widely applied to the field of frequency control.
Owner:GUANGZHOU CHENGXING ZHIDONG AUTOMOTIVE TECH CO LTD

Handling method and device for double-medium stacked supporting and hard top plate type mined-out area

The invention discloses handling method and device for a double-medium stacked supporting and hard top plate type mined-out area, and aims at solving the construction problem that the hard top plate of a thick coal mine seam is difficultly fallen. The method is that a base stack body fills in the mined-out area after the mining at the working face; the base stack body and the top plate are subjected to flexible roof contact by filling chemical materials; the spacing and arrangement distance of the filled stacks are influenced by the mining depth, height and lithology of the top plate and other factors, wherein the arrangement distance is 15 to 30m, and the spacing is 8 to 15m; the section of the filled stack can be circular, rectangular or quadrate; the effective section area is 0.8 to 1m<2>; the flexible roof contact medium is 1/10 to 1/8 of the mining height; the base stack can be filled by grouting concrete or gravels and other materials. The method and device are particularly suitable for continuous mining of shallow buried thin coal seam layers; the design that the working surface is frequently moved while supporting the mined-out area through tool posts is replaced, or the complex processes of softening the top plate by filling water and blasting and pre-cracking are decreased.
Owner:CHINA UNIV OF MINING & TECH

Method and device for the production of a metal strip by roll casting

InactiveCN101848780AAvoid or reduce end rollingReduce tail rollingFurnace typesMetal rolling arrangementsThin slabBatch operation
The invention relates to a method for the production of a metal strip (1) by roll casting, wherein initially a thin slab (3) is cast in a casting machine (2), wherein said slab is subsequently rolled in at least one rolling train (4, 5) while utilizing the primary heat of the casting process, wherein in a first operating mode a continuous production of the metal strip (1) may occur by directly coupling the casting machine (2) to the at least one rolling train (4, 5) (continuous rolling), and wherein in a second operating mode a discontinuous production of the metal strip (1) may occur by decoupling the casting machine (2) from the at least one rolling train (4, 5) (batch operation). In order to increase the flexibility of the system, the invention provides according to the method that slabs (3) or pre-strips (3') cast in the belt conveying direction (F) behind the casting machine (2) are removed from the main transport line (6) during the operation of the discontinuous production of the metal strip (1), stored, and later re-transported into the main transport line (6), wherein the slabs (3) or pre-strips (3') removed are brought to a desired temperature or are maintained at a desired temperature before the same are re-transported into the main transport line (6). The invention further relates to a device for the production of a metal strip (1) by roll casting.
Owner:SMS DEMAG AG

Human resource management bulletin column

The invention discloses a publicity column for human resources management, which includes a base, two fixing rods are fixedly connected to the upper surface of the base, and the opposite surfaces of the two fixing rods are respectively fixedly connected to the left and right side surfaces of the motor body, so that The output shaft of the motor is fixedly connected with a threaded column, and the outer wall of the threaded column is threadedly connected with a threaded cap, and the left and right sides of the threaded cap are respectively fixedly connected with the opposite surfaces of the two connecting rods, and the tops of the two connecting rods All are fixedly connected with the lower surface of the movable plate, the lower surface of the movable plate is fixedly connected with the upper surface of the base through two third telescopic rods, and the upper surface of the movable plate overlaps with the lower surface of the electronic display screen. The human resource management bulletin board realizes the disassembly of the electronic display screen through the joint action of the electric push rod, the fixed block, the first spring, the first telescopic rod, the second spring, the second telescopic rod, the pulley and the friction pad. It is convenient for the maintenance of the electronic display screen and brings convenience to the workers.
Owner:四川九一零科技有限公司
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