36results about How to "Avoid catastrophe" patented technology

The invention discloses a dam exceeding-standard flood diversion siphon frieze group and belongs to the technical field of dam flood diversion hydraulic engineering. The siphon frieze group can disperse and bleed the exceeding-standard flood to farmland directly to protect the dam and is simple in structure, convenient to finalize, design, produce and transport, convenient and fast to construct, and low in cost. The siphon frieze group comprises a trash rack (2) arranged at the outside of an inlet of a siphon body (5); the siphon body (5) is connected with a water input tube belt valve (6); the tail end of the siphon body (5) is provided with a water output belt clamp valve (8); the water output belt clamp valve (8) is connected with a water output belt (9) made of a rigid body framework artificial synthetic material; an outlet of the water output belt (9) made of the rigid body framework artificial synthetic material is arranged above an apron (10-2) made of an artificial synthetic material; the downstream of the apron (10-2) made of the artificial synthetic material is connected with a rope net pile sandbag baffle sill (11); and the downstream of the rope net pile sandbag baffle sill (11) is connected with an apron extension (10-3) made of an artificial synthetic material. The siphon frieze group is suitable for controllable flood diversion of exceeding-standard floods for dikes, dams and auxiliary dams and dam flood diversion and rescue.

Disclosed is a multistage self-bursting soil flood diversion dam protected through geosynthetic materials. According to the multistage self-bursting soil flood diversion dam protected through the geosynthetic materials, a slope protection (2) is arranged within the upstream scouring protection range of a soil water passing dam (1), and an automatic water level indicator (3) is arranged on an upstream slope of the soil water passing dam (1); a platform (4) is laid at the upstream end of the soil water passing dam (1), and the weir crest of the soil water passing dam (1) is connected with a trapezoidal weir surface geosynthetic material protection surface (6-1); a downstream slope of the soil water passing dam (1) is connected with a trapezoidal discharge chute geosynthetic material protection surface (6-2); a rope-tied non-woven fabric threading fixing foot (8) is arranged at the bottom of a downstream slope foot of the soil water passing dam (1); and a fixing body I (7-1) is arranged at the bottom of the upstream end of the trapezoidal weir surface geosynthetic material protection surface (6-1), and a fixing body II (7-2) is arranged at the bottom of the downstream end of the trapezoidal weir surface geosynthetic material protection surface (6-1). The multistage self-bursting soil flood diversion dam is used for flood diversion of the soil dam.

The invention discloses a device capable of switching to brake operation after stepping on the gas pedal as a brake by mistake, which belongs to the technical field of automobile control mechanisms and aims to overcome the problem that a driver mistakenly steps on the gas pedal as a brake and cannot avoid causing catastrophe. It includes an accelerator pedal, an accelerator pedal arm, and a brake pedal arm. The accelerator pedal arm is set as an upper half arm and a lower half arm. The groove is provided with a positioning pin. The semicircular head of the positioning pin is pushed into the groove of the lower half arm through the hole on the upper half arm. The exposed tail end of the positioning pin is pressed by a pressure plate. The pressure plate and the upper half arm can be rotatably assembled. It is also equipped with a pressure maintaining mechanism, the pressing plate extends downwards, and the lower end is provided with a pressing shoe, and the brake pedal arm is equipped with a bearing rod in the direction of pressing the shoe. The invention is suitable for automobile manufacturing industry or refitting industry.

The invention discloses a method for monitoring a short-circuit fault between a stator core and a cross-core threaded rod in a synchronous generator. A high-resistance resistor and a sampling resistor are connected with the ground, wherein the high-resistance resistor and the sampling resistor are in series connection and connected to the cross-core threaded rod which is arranged in the stator core in the synchronous generator; a momentary value of voltage across two ends of the sampling resistor are collected online, the momentary value of the voltage is compared with a fault determining threshold value, and when the momentary value of the voltage exceeds the fault determining threshold value, it is determined that the short-circuit fault occurs between the stator core and the cross-core threaded rod in the synchronous generator. The method can solve the deficiency in the prior art and improve the diagnostic ability of such faults.

An SF6 circuit breaker gas detection on-line monitor relates to gas temperature, pressure and humidity detection. It uses the gas charging interface of the SF6 circuit breaker to connect with the gas exporting joint to export the gas. After the monitor is installed, the gas exporting joint automatically opens the check valve in the charging interface of the SF6 circuit breaker body. The gas enters the air cavity and passes through the temperature sensor and pressure sensor. , Humidity sensors are monitored separately and then processed by the circuit to display each parameter, and can be used for extended processing such as alarm and communication. The monitor can realize online monitoring, improve the automation of equipment maintenance, detect abnormalities in time, and avoid malignant failures.

A flood diversion pipe band group of a dam for above standard flood belongs to the technical field of hydraulic engineering of dam flood diversion. In case that above standard flood comes, the flood diversion pipe band group is capable of realizing flood diversion to prevent an embankment from bursting; and the flood diversion pipe band group has the advantages of simple structure, finalized design and production, convenient transportation, fast construction, and low manufacturing cost. The flood diversion pipe band group comprises inlet hafnium U-shaped grooves, cage type trash racks, HDPE flap valves, flood diversion pipe bodies, outlet hafnium U-shaped grooves, water delivery bands each having a rigid framework and made of an artificially synthesized material, aprons of a geotechnical synthetic material, sandbag baffle sills, and color strip cloth sandbag scour prevention sections; the flood diversion pipe bodies along with the water delivery bands each having the rigid framework and made of the artificially synthesized material are arranged at equal distances and in parallel, and therefore, the flood diversion pipe band group of the same flood diversion point is constructed as required. The flood diversion pipe band group is arranged dispersedly along two sides, and capable of implementing temporary controllable flood diversion to a farmland at any place without permanently occupying the cultivated land; no special flood retarding basin is needed, and great calamity caused by concentrated flood diversion, and high-investment whole-line flood fighting can be avoided; the detachable and combinable flood diversion pipe band group can be quickly constructed when flood diversion is needed during flood-fighting and emergency rescues, and is convenient to use and manage.

The invention discloses a disaster prevention and reduction method for preventing overproof flood dyke water damage, and belongs to the technical field of very flood diversion for flood, drought, disaster reduction and water conservancy projects. By the aid of the flood diversion system for overproof flood dyke disaster prevention and reduction, great calamity caused by disastrous dam-failure surge can be prevented, people and livestock can have the chance to escape when encountering irresistible flood, the aims of turning great deluge into waterlogging and turning small deluge into benefits are realized, soil cannot be occupied permanently, implementation is convenient and manufacturing cost is low. The method involves in overproof flood dyke protection with diverted flood dispersed towards the farmland and controllable flood diversion overproof flood dyke disaster prevention and reduction theory, novel geosynthetics controllable very flood diversion measures, an overproof flood novel river dyke protection flood diversion system and flood-fighting and emergency rescue flood diversion system, an overproof flood novel reservoir very flood diversion system, and an overproof flood novel headwork very flood diversion system. The method is suitable for disaster prevention and reduction design of river dyke, reservoir, headwork and channel crossing very flood diversion, and is also suitable for overproof flood dyke flood-fighting and emergency rescues.

The invention discloses a fault degeneration state prediction method of a closed-loop control system for an intelligent power plant turbine bearing. The fault degeneration state prediction method comprises the steps of firstly, extracting a part relevant to a time sequence in a variable by canonical variate analysis (CVA); secondly, performing slow feature analysis (SFA) on the part relevant to the time sequence, and respectively extracting steady-state characteristic and time changing characteristic, wherein the extracted time changing characteristic and the steady-state characteristic can beused for fully reflecting time sequence correlation and changing speed of the variable in the closed-loop control system of the turbine bearing; and finally, inputting the extracted characteristic toa continuous hidden Markov model (CHMM) to forecast a fault degeneration state. According to the method, the time sequence correlation and the changing speed of the variable of the closed-loop control system during the dynamic adjustment process when a fault occurs are simultaneously considered, and the fault degeneration state of the closed-loop control system of the intelligent power plant turbine bearing can be more accurately forecasted.

The invention relates to a novel shortening polar code method and system. The method includes determining the error probability of the corresponding split sub-channel according to the error rate of each split sub-channel in the polar code; and determining the error probability set of the polar code; performing a bit flip operation on the polar code; The grouped polar codes are grouped; and the auxiliary matrix is ​​determined for the grouped polar codes; the frozen bit set is determined according to the shortened bit set determined by the auxiliary matrix and the polar code error probability set; according to the shortened bit set, the information bit set, and the shortened polar code The code length and frozen bit set are used to shorten the polar code, and determine the shortened polar code; use the shortened polar code to encode the information transmitted in the optical fiber channel; when decoding, the code word bits of the shortened polar code correspond to The LLR value of is determined to be positive infinity, and is decoded using a polar code decoder. The invention can reduce the bit error rate of the shortened polar code, improve the compatibility, and further improve the stability of the system.

The invention provides a control method for the air brake system of a generator motor, which includes normal shutdown of the unit, shutdown of the mechanical accident, shutdown of the electrical accident, power failure of the water pump, power forwarding of pumping water, abnormal bearing tile temperature, startup of the unit, creep of the unit, and high-speed air brake The damper control strategy and safety lockout under abnormal input conditions can minimize the idle running time of the unit shutdown and ensure the safe operation of the thrust pad in order to protect the thrust bearing pad of the unit and shorten the downtime. , to avoid the occurrence of malignant failures to the greatest extent, and improve the safety and reliability of the air brake system.

The invention relates to a dam over-standard flood diversion duct tape, and belongs to the technical field of a dam flood diversion hydraulic engineering. The dam over-standard flood diversion duct tape can controllably disperse and divert over-standard flood to farmlands to protect a dam; an outlet of a dynamic floating body, adopts a novel energy dissipation mode and has the advantages of trajectory flow, surface flow and bottom flow; and the dam over-standard flood diversion duct tape is applicable to any topographical geological conditions. The dam over-standard flood diversion duct tape is simple in structure, is rapid and convenient in construction, and low in cost. The dam over-standard flood diversion duct tape adopts the structure that a cage screen (4) is placed in a hafnium U-shaped groove (3) of an upstream inlet; an HDPE (high-density polyethylene) flap valve (5) is fixed outside an inlet of a flood diversion duct body (6); the flood diversion duct body (6) is horizontally buried at the upper part of the dam (1); the downstream end of the flood diversion duct body (6) is connected with a water delivery tape (9) made of an artificial synthetic material; and an outlet of the water delivery tape (9) made of the artificial synthetic material is formed on the dynamic floating body (10). The dam over-standard flood diversion duct tape is applicable to controllable flood diversion and flood-fighting and emergency rescues of embankments and dams.