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989 results about "Protective system" patented technology

Protective systems are methods of protecting workers from cave-ins of material that can fall or roll into an excavation, or from the collapse of nearby structures. As mentioned in earlier chapters, if an excavation is less than 5 feet deep, OSHA does not require a protective systems unless the competent person sees signs of a potential cave-in.

Real-time digital simulation model for multi-infeed direct current power transmission system

The invention relates to a real-time digital simulation model for a multi-infeed direct current power transmission system. The real-time digital simulation model comprises a plurality of equivalent super-voltage direct current power transmission systems which are connected in parallel, wherein the super-voltage direct current power transmission systems comprise a primary system real-time digital simulation model and a secondary system real-time digital simulation model; the primary system real-time digital simulation model comprises a convertor station and a direct current power transmission circuit, wherein the convertor station is arranged on the two ends of the direct current power transmission circuit; the secondary system real-time digital simulation model comprises a convertor station control system and a protective system, wherein the convertor station control system and the protective system are connected with the convertor system, and are used for controlling and protecting the operation of the convertor station. The operation of the convertor station is controlled and protected by the convertor station control system and the protective system, so that a plurality of direct current simultaneous faults and a plurality of direct current faults which are easily caused by alternating current system fault are avoided, and the impact to the alternating current system in a fault recovery process is avoided.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +2

Expansive soil cut slope support structure and construction method thereof

ActiveCN103410159AEffective release of expansion forceTo achieve the purpose of overcoming rigidity with softnessArtificial islandsExcavationsProtective systemPlant cover
The invention relates to an expansive soil cut slope support structure and a construction method thereof, in particular to the field of highway and railway cut slope protection of expansive soil regions. The expansive soil cut slope support structure comprises a rigid supporting system, a flexible protection system and a waterproof and draining system. The rigid supporting system comprises a lame retaining wall arranged on an expansive soil cut slope and a retaining wall foundation; the flexible protection system comprises a lattice beam arranged on the expansive soil cut slope, an anchor rod, a flexible net-shaped geogrid laid on the slope surface and a plant cover planted on the slope surface; and the waterproof and draining system comprises an intercepting ditch or drainage ditch arranged at the top of the slope, a permeable layer positioned behind the retaining wall, a drainage ditch and a drainage seepage ditch positioned below the drainage ditch. The slope surface is supported through a flexible supporting system, and in comparison with a rigid supporting method of fully laying a mortar rubble structure on the slope surface, the construction cost is reduced by over 20%, and the construction period is greatly reduced; and expansive force generated when expansive soil is met with rainwater and expands can be effectively released.
Owner:NANCHANG INST OF TECH

Ground electrode circuit protective system and device of high-voltage DC transmission system

The invention relates to a ground electrode circuit grounding protective system of a high-voltage DC transmission system. The system is provided with two parallel ground electrode circuits respectively connected in series with a high-voltage DC breaker, sets an allowable range of current differences of two ground wires and an allowable range of the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires and then sequentially executes the following control program: (1), reading currents of the two ground wires; (2), judging and comparing whether an absolute value of the current difference of two ground wires is larger than the allowable range thereof, if the absolute value is not larger than the allowable range, returning to the step (1); if the absolute value is larger than the allowable range, (3) then, judging whether the subtraction of the line current sum of the two ground wires from the line current difference of the two ground wires is smaller than or equal to the allowable range; if the subtraction is smaller than or equal to the allowable range, returning to the step (1); and if the subtraction is not smaller than or equal to the allowable range, enabling the high-voltage DC breaker which is connected in series with the ground wire with larger line current to trip and terminate the program. The system can avoid the imbalance of the ground electrode circuits due to the failures of the ground electrode circuits and protects the caused DC transmission system to be closed down.
Owner:CSG EHV POWER TRANSMISSION

Perimeter protection system and method

The invention discloses a perimeter protection system which comprises a fencing, a video monitoring system, an optical fiber shaking alarm system and a monitoring center, wherein a protective area is encircled by the fencing; a plurality of monitoring centers are distributed by the video monitoring system along a protection perimeter and are communicated with one another; a shaking detection line is paved by the optical fiber shaking alarm system along the protection perimeter; the video monitoring system and the optical fiber shaking alarm system are respectively connected with the monitoring center; the monitoring centers collect video information of the protection perimeter and transmit the video information to the video monitoring center; and the optical fiber shaking detection line detects shaking information of the protection perimeter and transmits the information to the monitoring center. The invention further provides a corresponding perimeter protection method which comprises the step of: sensing shake of the protection perimeter and alarming; judging and transmitting position information of an alarm point; calling a scene image of the alarming point according to the alarm information; and determining and processing the alarm information.
Owner:BEIJING JIAXUN FEIHONG ELECTRIC CO LTD

System for Measuring the Image Quality of an Optical Imaging System

InactiveUS20080252876A1Avoid affecting measurement accuracyRadiation pyrometryUsing optical meansImaging qualityOptical measurements
A measuring system (100) for the optical measurement of an optical imaging system (150), which is provided to image a pattern arranged in an object surface (155) of the imaging system in an image surface (156) of the imaging system, comprises an object-side structure carrier (110) having an object-side measuring structure (111), to be arranged on the object side of the imaging system; an image-side structure carrier (120) having an image-side measuring structure (121), to be arranged on the image side of the imaging system; the object-side measuring structure and the image-side measuring structure being matched to each other in such a way that, when the object-side measuring structure is imaged onto the image-side measuring structure with the aid of the imaging system, a superposition pattern is produced; and a detector (130) for the locally resolving acquisition of the superposition pattern. The imaging system is designed as an immersion system for imaging with the aid of an immersion liquid (171). A structure carrier to be arranged in the region of the immersion liquid is assigned a protective system (125) in order to increase the resistance of the measuring structure to degradation caused by the immersion liquid. A measurement of immersion systems under immersion conditions is thereby possible without detrimental influence of the immersion liquid on the measuring accuracy.
Owner:CARL ZEISS SMT GMBH

System and method for malicious code analysis based on cloud computing

The invention relates to a malicious code analysis method, in particular to a system and method for malicious code analysis based on cloud computing. The system for malicious code analysis based on cloud computing comprises a malicious code analysis proxy and a malicious code could analysis system. The malicious code analysis proxy comprises a safety monitoring engine, a searching and killing engine, a local black list, a local white list, a behavior pattern bank and a virus characteristic bank. The malicious code could analysis system comprises a characteristic judging and searching engine, a sample storage center, multiple analysis engines, a global black list, a global white list, a global malicious behavior characteristic bank and a global virus characteristic bank. According to the system and method for malicious code analysis based on cloud computing, safety servitization is achieved based on the cloud computing technology, compatibility and cooperation of the multiple searching, killing and analysis engines are achieved, the threat analysis and response ability of the whole network is improved through the strong data processing and analysis ability of a cloud terminal, rapid discovery, rapid analysis and rapid processing of host threats are achieved, the safety of the host operation environment is guaranteed powerfully, and the self-protection ability of a host intrusion detection protective system can also be improved.
Owner:706 INST SECOND RES INST OF CHINAAEROSPACE SCI & IND

Method for improving and protecting collapsible loess slope project

The invention relates to a method for improving and protecting a collapsible loess slope project, which is characterized in that: the loess slope project is protected by adopting improved loess (3), gunny bags (4), a protective net (5), a geogrid (6) and a drainage ditch (8), wherein the improved loess is prepared by stirring and blending lime, fly ash and loess in a volume ratio, the total volume of the lime and fly ash accounts for no less than 30 percent of the volume of the admixture, the SiO2 and Al2O3 total content of the fly ash is no less than 75 percent, and the lime is calcium quicklime or calcium hydrated lime; the geogrid (6) is high-density polyethylene uniaxial geogrid; the gunny bags (4) are jute gunny bags; and the protective net (5) is made of a flexible stainless steel material. The method has the advantages of stabilizing the slope, solving the stability problem of the fill slope, realizing waste utilization, afforesting the environment and preventing soil erosion by improving the structural protective system consisting of the loess and geogrid; and the method is suitable for improving the collapsible loess project in civil engineering and can be used for projects such as highway embankment filling, building foundation improvement, retaining wall reinforcement and the like.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI

Train control system adapting to existing line reconstruction and train control method

The invention discloses a train control system adapting to existing line reconstruction. The train control system adapting to existing line reconstruction comprises ground equipment and on-board equipment. The ground equipment comprises an interlocking system, a parallel-port LEU and an active balise which are mounted in a station and connected sequentially, wherein the parallel-port LEU combines contact states of the interlocking system into access selection conditions and sends station messages to the corresponding active balise, and when a train passes through an acting range of the active balise, the active balise sends the corresponding station message to the on-board equipment of the train. The on-board equipment comprises a BTM (balise transmission module), a BTM antenna and an automatic train protection system, wherein when the train passes through the acting range of the active balise, the BTM receives the station messages sent by the active balise and sends the station messages to the automatic train protection system for subsequent processing. The train control system adapting to existing line reconstruction has the advantage that access information is sent to the on-board BTM through the station messages to enable a driver to acquire correct access information directly, so that the train pull-in risk that the driver selects wrong access information due to misoperation is avoided.
Owner:BEIJING JIAOTONG UNIV
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