33results about How to "Timely and effective" patented technology

The invention provides a data mining based wind turbine generator system fault diagnosis method. The method comprises the following steps of: S1, removing data noises and processing missing values of wind turbine generator system parameters acquired in real time; S2, carrying out amplitude domain analysis; S3, carrying out correlation analysis; S4, building a fault decision tree for data samples with different fault types; S5, adopting a post-pruning method for the built fault decision tree to remove the noises in the data and training abnormity caused by outliers; S6, extracting the knowledge shown by the post-pruned fault decision tree to give the fault decision rules in the form of IF-THEN; and S7, repeating the steps S1, S2 and S3, carrying out fault diagnosis on the processed data by utilizing the fault decision rules extracted in the step S6 and displaying the diagnosis results. The method has the following beneficial effects: the fault parts of the wind turbine generator system can be timely and effectively determined; the fault types and reasons can be determined; and major accidents caused by fault deterioration can be prevented.

The invention provides a method for protecting account security based on an asynchronous dynamic password technology. The method is characterized by including the steps that a user and a service provider agree on the encryption mode of challenge codes and the calculation formula of dynamic codes; after a log-in request of the user is verified successfully, an authentication server generates the challenge code A, the challenge code B and the dynamic code C, the challenge code A is encrypted to obtain the challenge code B, and the challenge code A is calculated through the calculation formula to obtain the dynamic code C; the authentication server sends a feedback message containing the challenge code B to a mobile phone of the user; the user decrypts the challenge code B according to the encryption mode and then substitutes the decrypted challenge code B into the calculation formula to obtain the dynamic code D; the user inputs the dynamic code D and an account name in the log-in interface on the client side to log in. A system is high in reliability, the secrecy degree for transmitting the challenge codes and other information is high, leakage of code information of the user can be effectively avoided, and moreover user operation is safe and reliable.

A water quality on-line monitoring system with electrode automatic cleaning and calibration functions is disclosed. The water quality on-line monitoring system contains a water sample acquisition mechanism, a water storage bunker, a water sample monitoring tank and a water quality monitoring sensor. The water sample acquisition mechanism is communicated with an inlet of the water storage bunker, an outlet of which is communicated with a water sample inlet at the upper part of the water sample monitoring tank. An outlet at the bottom of the water sample monitoring tank is communicated with an inlet of a water sample recovery bunker. The top of the water sample monitoring tank is provided with a mounting hole. The water quality monitoring sensor passes through the mounting hole to extend into the water sample monitoring tank. The water quality monitoring sensor is fixed on a supporting platform, which is connected to a lifting module used for driving the supporting platform to move up and down. The system of the invention has good timeliness and effectiveness and high accuracy.

The invention relates to an arc extinguish chamber and a direct current contactor adopting the arc extinguish chamber. The direct current contactor comprises a moving contact assembly and a stationary contact assembly, wherein an upper arc guide angle assembly bent upwards is arranged beside a moving contact of the moving contact assembly, a lower arc guide angle assembly bent downwards is arranged beside a stationary contact of the stationary contact assembly, the arc extinguish chamber is arranged between the upper arc guide angle assembly and the lower arc guide angle assembly, arc guide pieces are alternatively arranged in the arc extinguish chamber in a layering mode, an arc guide port is formed in one end of each arc extinguish piece, a plurality of arc extinguish ribs facing the interior of the arc extinguish chamber are arranged at the other end of each arc extinguish piece at intervals, and a metal piece connected in a bending mode is arranged at least on one arc extinguish rib. The arc extinguish chamber and the direct current contactor adopting the arc extinguish chamber resolve the problems in the prior art that the motion time of the electric arc in the arc extinguish chamber is too long, and the arc extinguish chamber is large in loss and short in service life under the conditions that currents are too strong or too weak, can rapidly pull the electric arc to the maximum, timely and effectively extinguishes the electric arc and is safe and durable.

The invention discloses an outer arc chamfering structure of a forming mold, comprising: a base plate, the top of the base plate is respectively fixed with a correction and grinding mechanism, a workpiece adjustment mechanism and a waste material collection mechanism, which are converted to the inside of the second ring groove for processing There are burrs and some uneven structures in the rear chamfering part, which is in contact with the rough grinding block in the second ring groove. After a period of processing, the metal mounting bracket is moved again and changed to the third ring groove. Inside, the chamfering of the workpiece after two treatments is contacted with the fine-faced grinding block in the third ring groove, and the final treatment is carried out. Through the above conditions, the chamfering and post-grinding of the existing device cannot be processed synchronously. The effect is to adjust the contact distance between different action areas and workpieces, so that after the chamfering is formed, the burrs and other uneven structures on it can be dealt with effectively in time, without the need for back and forth replacement between devices, reducing input costs.

A continuous casting square billet corner defect automatic pre-warning system comprises an image acquisition unit, a casting flow tracking unit, an analyzing and processing unit, an alarming display unit and a storage recording unit. The continuous casting square billet corner defect automatic warning system is characterized in that an image acquisition card is used for performing high-speed sampling on video signals and completing digitalized conversion, and digitalized image information capable of being processed by the analyzing and processing unit is formed. By means of the technical scheme, the timeliness and the effectiveness of pre-warning are high, running is reliable, cost is low, interference caused by scale and other spurious signals is avoided, automatic pre-warning can be achieved at the early stage when the continuous casting square billet corner defect is formed, and an effective mean is provided for abnormality monitoring and fast processing of the state of a casting machine; and the occurrence risk of the batch angle quality of continuous casting billets can be effectively reduced, the finished product rate can be increased easily, and product quality loss is reduced.

The invention discloses a defoaming method for the reaction system of amide compounds and phosgene. The defoaming method uses polytrifluoropropylmethylsiloxane as a defoaming agent to defoam the reaction system of amide compounds and phosgene. bubble treatment. In the defoaming method of the present invention, polytrifluoropropylmethylsiloxane is used as the defoaming agent, which can accelerate the dissolution and dispersion of the foam produced in the reaction process, does not require special reaction equipment, and can effectively eliminate the foam in the reaction system in time. Foam, with the advantages of fast defoaming speed and good defoaming effect, solves the foaming problem of the reaction system of amide compounds and phosgene, greatly improves the feeding coefficient of the reaction system of amide compounds and phosgene, and ensures a higher reaction On the basis of the yield and product purity, the reaction rate is accelerated, so that the production capacity is greatly increased, which is beneficial to industrial production, and has good application value and application prospect.