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56 results about "Prevention problems" patented technology
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Identity authentication method, identity authentication equipment, server and identity authentication-based encryption method
ActiveCN102035654ANo tamperingSolve the anti-counterfeiting problemUser identity/authority verificationHandwritingDigital signature
The invention provides an identity authentication method, identity authentication equipment, a server and an identity authentication-based encryption method and aims to solve the counterfeiting and repudiation prevention problems of identity authentication. The method comprises the following steps of: combining a written signature with a digital signature; acquiring the written signature handwriting of a user through the identity authentication equipment such as a universal serial bus (USB) key; combining the written signature handwriting with transaction data and performing digital signing; and transmitting signature data and the encrypted written signature handwriting to a verification party (such as an Internet bank background system). The signature data is verified by the verification party, so that the written signature handwriting and confidentiality data are not tampered in a transmission process; simultaneously, the truth of the written signature handwriting is verified by the verification party, so that the signature of the written signature handwriting by a user is ensured.
Owner:BEIJING WATCH DATA SYST
First tunnel then station continuous construction shield station entering method
InactiveCN104948196AAchieve progressAchieve securityUnderground chambersTunnel liningWater leakageShield tunneling
The invention discloses a first tunnel then station continuous construction shield station entering method. The first tunnel then station continuous construction shield station entering method comprises the following steps that a, in a station construction position, the arrangement distance between a station building envelope and a central stand column is controlled, and therefore a shield excavation space used for allowing a shield tunneling machine to pass through the station is formed; b, reinforcement process is conducted on the end head of the station, reinforcement is conducted the building envelope on tunnel shield excavation path of the shield tunneling machine, and grouting pipelines for preventing water leakage are reserved in the building envelope; c, the tunnel shield excavation path is made to be connected and communicated with the shield excavation space, and then a continuous tunnel shield excavation path form a tunnel to the station is formed; d, the shield excavation is conducted on the continuous tunnel shield excavation path. The first tunnel then station continuous construction shield station entering method aims at designing an excavation station passing method for the requirement that the station can not provide conditions on time when the shield tunneling machine has to pass the station, the shield tunneling machine can pass the station safely and successfully, the water prevention problem of the connecting joint of the station and the tunnel is solved, and the progress and the safety of the project are guaranteed.
Owner:CHINA CONSTR FIFTH ENG DIV CORP LTD
Processing technology of ham
InactiveCN105533460AKeep the flavorSolve the pest control problemClimate change adaptationFood preservationWaxManufacturing technology
The invention discloses a processing technology of ham, and relates to the technical field of food pickling. The processing technology comprises the following steps: (1) cutting and shaping fresh pig hind legs; (2) pickling pig hind legs by salt; (3) stacking the pig hind legs, overturning the piles, and pressing; (4) washing, drying in the sun, and trimming the shape; (5) hanging the pig hind legs to dry the pig hind legs in the air; (6) trimming the shape again; (7) filling the cracks to prevent insects; (8) carrying out western type fermentation; (9) painting the whole pig hind legs by edible bee wax (palm wax) so as to maintain the water content; (10) keeping on fermentation; (11) polishing and selling. The provided technology changes the conventional fermentation and storage method in ham industry, preserves the unique flavor of ham, solves the insect prevention problem which has not been solved in hundreds of years, and largely prolongs the shelf life. Moreover, compared with the conventional manufacturing technologies, the provided processing technology can effectively reduce the content of fat peroxide in the same fermentation period.
Owner:YUNNAN XUANYU FOOD CO LTD
Malicious code detection method based on SDN (Software Defined Networking)
ActiveCN105956473ASolve the problem of huge computational consumptionPlatform integrity maintainanceTraffic characteristicInformation security
The invention discloses a malicious code detection method based on an SDN (Software Defined Networking), and belongs to the technical field of computer network security. New opportunities and challenges of solving detection and prevention problems of malicious codes under new architecture are brought to a network information security field by a brand new design concept of separating control and forwarding of the SDN. According to the method, through analysis of an SDN switch flow table characteristic selection method, a security data ranking and dimension reduction method for traffic characteristic selection based on OpenFlow is provided; on this basis, through comparison of influences on the operation time of different classification algorithms after characteristic selection, a reduction dimension m selection problem is analyzed, and the optimum characteristic subsets and matched classification algorithms corresponding to different kinds of malicious codes are found; the propagation characteristics and evolution models of the malicious codes in an SDN mobile environment are analyzed, thereby obtaining the influences of a node migration rate in a mobile network on the infection condition and explosion time of the malicious codes in a source sub-network and a target sub-network, and the influences have reference values on the routing control of the SDN controller to the switch nodes or host nodes.
Owner:GUANGDONG POLYTECHNIC NORMAL UNIV
Drilling-cutting-linked coal layer gas drainage and outburst prevention system and method based on ultra-long drilling and high-pressure water jetting
InactiveCN102465712AIncrease the exposed areaExpand the scope of the releaseOperating means/releasing devices for valvesMultiple way valvesPressure senseHigh pressure water
The invention discloses a drilling-cutting-linked coal layer gas drainage and outburst prevention system and method based on ultra-long drilling and high-pressure water jetting. The system comprises a drill bit, a pressure sensing valve, a drill stem, a drill machine, a high / low-pressure water delivery and rotation device, a high-pressure pump and a water tank, wherein the pressure sensing valve is mounted at the front end of the drill stem; the drill bit is mounted at the front end of the pressure sensing valve; a nozzle is mounted at the outer side of the pressure sensing valve; the drill machine drives the drill stem to rotate; and water in the water tank is delivered to the high / low-pressure water delivery and rotation device through the high-pressure pump, input to the drill stem through the high / low-pressure water delivery and rotation device and delivered to the pressure sensing valve through the drill stem. In the drill withdrawing process, the coal layer is cut by the high-pressure water, thereby realizing the drilling-cutting linkage and improving the working efficiency. The invention is simple and delicate in structure; and by using the invention, the cutting diameter can be up to 3 meters or above, thereby increasing the gas exposure area to more than 6 times of the traditional gas exposure area and effectively widening the gas release range by more than 3 times. Thus, the invention solves the drainage and outburst prevention problems of coal mine gas.
Owner:湖南汉寿中煤科技有限公司
Coiled tubing falling-prevention device and usage method thereof
ActiveCN106194049ASimple structureEasy to processDrilling rodsSealing/packingCoiled tubingEngineering
The invention discloses a coiled tubing falling-prevention device and a usage method thereof. The coiled tubing falling-prevention device comprises a spear-shaped central rod, a grooving slip and a limiting prevention cylinder which are sequentially arranged from inside to outside in a sleeved mode. The inner wall of the limiting prevention cylinder sequentially and inward sinks from top to bottom step by step to form a first annular step and a second annular step which are in shapes of steps, the top end face of the grooving slip abuts against the lower end face of the first annular step, an outer thread is arranged on the outer wall of the spear-shaped central rod, a connecting outer thread is arranged on the inner wall of the first annular step of the limiting prevention cylinder, and the grooving slip is limited by adjusting the limiting prevention cylinder relative to the position at the thread connecting position on the spear-shaped central rod. A falling-prevention function during coiled tubing fishing can be played by using the coiled tubing falling-prevention device. When a dangerous overflow case appears at a well opening, blowout prevention short section matched with the device is rapidly installed in time, and the blowout prevention problem of a coiled tubing inner cavity and a small annulus between the coiled tubing and an oil pipe can be also solved.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Oral care liquid for preventing chemotherapy-induced oral mucositis
InactiveCN102698069AReasonable compositionDigestive systemPlant ingredientsOphiopogon japonicusClinical tests
The invention discloses an oral care liquid for preventing chemotherapy-induced oral mucositis, aiming to solve prevention problem of chemotherapy-induced oral mucositis. The oral liquid comprises is characterized by being prepared from Chinese herbs and comprising the following Chinese herbs by weight: 6-10 parts of Radix Serissae, 8-15 parts of Fructus Ligustri Lucidi, 8-15 parts of Ficus virens, 6-10 parts of Radix Rehmanniae, 6-10 parts of Radix Scrophulariae, 8-15 parts of Radix Ophiopogonis, 6-10 parts of Radix Adenophorae, 8-15 parts of Rhizoma Anemarrhenae and 3-6 parts of Herba Pileae Scriptae. Clinical tests prove that the oral care liquid has good effect in preventing chemotherapy-induced oral mucositis, and is suitable for clinical application and popularization.
Owner:威海市妇女儿童医院
Pulling bar controlled type dual-linkage freeze-prevention ceramic valve
ActiveCN106246944AReduce manufacturing costEasy to operateMultiple way valvesSlide valveEngineeringMechanical engineering
The invention discloses a pulling bar controlled type dual-linkage freeze-prevention ceramic valve which comprises a base, a control part, and a switching part, wherein at least four channels are arranged on the plane of the base; the control part is fixedly arranged on the upper end of the base and consists of a static plate and a movable plate, five holes are formed in the plane of the static plate and are respectively a cold water inlet hole, a cold water outlet hole, a hot water inlet hole and a hot water outlet hole which are respectively communicated with the four channels, and a drain hole which is not communicated with the four channels, a concave cavity is formed in the plane of the movable plate, and the movable plate is covered on the static plate in a slideable manner, and according to the relative sliding position, the five water holes are communicated in pairs through the concave cavity selectively; and the switching part is arranged above the control part so as to drive the movable plate to slide relative to the static plate. The pulling bar controlled type dual-linkage freeze-prevention ceramic valve facilitates the input and output of cold water and hot water independently, and the icing and freeze prevention problems in winter can be solved.
Owner:GUANGZHOU SEAGULL KITCHEN & BATH PROD
Video link theft prevention method based on FFMPEG
InactiveCN107483978ANormal playbackTransmissionSelective content distributionComputer graphics (images)Operability
The invention discloses a video link theft prevention method based on FFMPEG. The video link theft prevention method comprises the steps that an original video is uploaded to a catalog of a slice and sliced into M3U8 slice files through written slice pins, and the video obtained after slicing is automatically transmitted to a catalog of an encryption program to be automatically encrypted and then transmitted to a CDN server. The video played by a user is smooth, and the video downloaded in a special mode cannot be played normally. According to the method, the video theft prevention problem is well solved, and high practicability and operability are achieved.
Owner:河南卓凯软件科技有限公司
Data line interface, portable equipment and method for connecting data line interface with portable equipment
ActiveCN105356127ASolve waterproof and dustproofRealize forceCoupling device engaging/disengagingCouplings bases/casesExternal dataData interface
The invention provides a data line interface, portable equipment and a method for connecting the data line interface with the portable equipment. The portable equipment comprises a data slot used for connecting an external data interface, a movable baffle arranged at the opening of the data slot and used for sealing the opening, a limiting mechanism connected with the movable baffle and used for limiting the movable baffle from moving, a sensor arranged corresponding to the data slot, and a control unit of which an input end is connected with the sensor and an output end is connected with the limiting mechanism, wherein the control unit is used for driving the limiting mechanism to drive the movable baffle to move away from the opening of the data slot when sensing that the external data interface wants to be plugged into the data slot. The data line interface comprises a plug corresponding to the data slot of any of portable equipment mentioned above, as well as an insulation part covering the plug. The invention effectively solves the waterproof and dust-prevention problem of the slot.
Owner:东莞市宇洋电子有限公司
Totally-closed socket
InactiveCN108448300AAvoid flashoverImprove securityCoupling contact membersCouplings bases/casesEngineeringMechanical engineering
A totally-closed socket includes: a housing, a protection door device, and a movable seat device, wherein the housing is composed of a socket cover and a socket base; the movable seat device comprisesa movable seat, a movable conductive piece mounting frame, a movable seat push plate and a spring; the protection door device has a base, a protection door, a slide block, a base lever and a spring,wherein the protection door is mounted on a protection door shaft, the protection door shaft is mounted on a shaft frame, the base lever are mounted under the protection door and the protection door shaft, a slope and a sliding slot are disposed on the slide block, the spring is connected with the slide block through a spring seat behind the slide block. When the protection door is pressed downward by the plug force, the protection door rotates downward to expose a jack. After the plug is inserted, and the movable seat with the conductive piece is clamped to the pins of the plug. Virtual and floating connection phenomena are avoided, and the single-pressure prevention problem is also solved. By appearance, the socket is a sealed cube and has no exposed jacks and pits. A safety factor is greatly improved. Virtual and floating connection sparks and resistance increases are prevented, and the service life is greatly prolonged.
Owner:山西腾行智能科技有限公司
Synthetic fiberboard moisture and mildew prevention treatment technology
InactiveCN105538447AImprove heat resistanceHigh strengthImpregnation spraying apparatusWood treatment detailsMass ratioMoisture absorption
The invention provides a synthetic fiberboard moisture and mildew prevention treatment technology. The technology comprises the following steps: 1, processing sodium silicate crystals Na2O.nSiO2 and sodium fluorosilicate crystals to prepare solutions, uniformly mixing the sodium silicate solution with the sodium fluorosilicate solution according to a mass ratio of 1:999-999:1, disposing the obtained mixed solution for 24h or above, and filing a container with the mixed solution; and 2, coating the surface of a synthetic fiberboard with the mixed solution through adopting a pressure spraying method or an in-container impregnation method to complete moisture and mildew prevention treatment. The technology can prevent influences of mildews induced by moisture absorption of synthetic fiberboards on the environment quality and the property loss, promotes development of the synthetic fiberboard industry, and is in favor of protecting the natural ecological forest. The treatment technology has the advantages of simplicity, low cost, short treatment time, and effective solving of the synthetic fiberboard moisture and mildew prevention problem.
Owner:万华禾香生态科技股份有限公司
Mining voltage type high-voltage explosion-proof frequency converter
ActiveCN104124856ASolve explosion-proofReduce volumeCooling/ventilation/heating modificationsPower conversion systemsEngineeringHigh pressure
The invention relates to a mining voltage type high-voltage explosion-proof frequency converter. The mining voltage type high-voltage explosion-proof frequency converter comprises a shell, wherein a plurality of reinforcing ribs are arranged on the outer wall and the inner wall of the shell; a plurality of clapboards are arranged in the shell, and partition the internal space of the space into a primary circuit chamber, a secondary circuit chamber and a water-cooling system chamber. The mining voltage type high-voltage explosion-proof frequency converter further comprises a water-cooling device, wherein the water-cooling device comprises an internal portion and an external portion; the internal portion is arranged in the water-cooling system chamber; the external portion is arranged outside the shell; the internal portion comprises an explosive-proof valve, a water distribution pipe and a water return pipe; the external portion comprises a radiator, an deionization exchanger and a pump unit. The mining voltage type high-voltage explosion-proof frequency converter has the beneficial effects that the explosion prevention problem during application of a voltage type high-voltage frequency converter under a coal mine is solved, and the problem of heat dissipation of a unit type structure is solved successfully. Through a water-cooled matched cabinet which is consistent with an explosion-proof standard, a plurality of water-cooling systems can be used at the same time, and a quick response can be made to failure of a cooling portion.
Owner:武汉合智数字能源技术有限公司
High-strength energy-saving environment-friendly burglarproof water drain pipe for bridge
InactiveCN104315259AImprove anti-theftSolve the anti-theftCorrosion preventionPipe elementsSurface layerHigh intensity
The invention discloses a high-strength energy-saving environment-friendly burglarproof water drain pipe for a bridge. The water drain pipe comprises a water drain pipe, and a filter screen and a water collection hole fixed ring which are molded once, wherein the filter screen consists of a filter plate and splicing teeth arranged at the edge of the filter plate; the water drain pipe consists of a large-diameter straight pipe and a small-diameter straight pipe which are connected through a conical pipe; lugs are uniformly arranged on the inner wall of the large-diameter straight pipe; the water collection hole fixed ring is adhered with the lugs in the large-diameter straight pipe; splicing holes are formed by gaps between the water collection hole fixed ring and the lugs; the splicing teeth on the filter screen are arranged in the splicing holes and are respectively adhered with the water collection hole fixed ring and the large-diameter straight pipe; a pitted surface layer is arranged on the outer surface of the water drain pipe; a pitted surface layer on the small-diameter straight pipe is provided with spiral concave-and-convex grooves. The high-strength energy-saving environment-friendly burglarproof water drain pipe has the advantages of high in anti-corrosion property, acid-alkali resistant, anti-aging, free of rusting energy-saving, environment-friendly, and the like; the load of bridge is reduced, the engineering quality is improved, the service life of the pipe is greatly improved, the maintenance cost is reduced, and the burglar prevention problem is radically solved.
Owner:WUXI ZHONGLIAN ELECTRONICS EQUIP
Lock
InactiveCN104343287AUnlock implementationSolve the problem of anti-technical unlockingKeysEngineeringMechanical engineering
The invention discloses a lock. The lock comprises a key, a lock cylinder jacket, a lock cylinder, a lock bolt, a blade, a blade hole, a locking piece and a limiting piece, wherein the blade hole is formed by combining a plurality of square grooves formed in the lock cylinder in the radial direction with the other half of cylinder; the limiting piece is L-shaped and provided with two trapezoidal bulges and two cylinders; two trapezoidal grooves mutually matched with the trapezoidal bulges of the limiting piece are formed in the lock bolt; two guide holes are formed in the locking piece; at least two blade locking grooves are formed in the side where the blade is coordinated with the lock bolt; the matched key comprises a sliding groove a and a sliding block which are arranged on a key rod; the sliding groove and the sliding block are arranged between a handle and key teeth. The limiting piece can release the limiting on the locking bolt only when the blade is locked by the locking piece and cannot move, and during the unlocking and pulling process, the lock bolt is always not in contact with the blade, so that the technical unlocking prevention problem is fundamentally solved.
Owner:严宗炜
Solar water heater overfilling-prevention and emptying device
InactiveCN101922812AImprove antifreeze abilitySolve the problem of water overflow preventionOperating means/releasing devices for valvesSolar heat devicesWater channelSolar water
The invention provides a solar water heater overfilling-prevention and emptying device, belongs to the field of solar water heater water pipe overfilling-prevention and emptying, and also relates to the field of overfilling-prevention of common water tanks. The device consists of a pressure control unit [1], an emptying one-way valve [2] and a pressure valve [3]. The pressure valve can be independently used for overfilling-prevention water supply control of a water tank and a water channel sharing water supply and water drainage pipes. The device has a simple and practical structure, can effectively solve the problems of overfilling-prevention and emptying of a solar water heater and a water supply overfilling-prevention problem of other water tanks sharing water supply and drainage pipes, and also has good freezing prevention performance. Besides, a hand operated mechanism provided by the invention can make the solar water heater normally used under the condition of power failure. The device can save precious water resource, and makes the application of the solar water heater wider so as to save energy used for heating.
Owner:乔超
LT type elastic sleeve pin coupling
InactiveCN110094431AImprove shock resistanceMeet shockproof requirementsYielding couplingLeft halfCoupling
The invention discloses an LT type elastic sleeve pin coupling. The coupling includes a left half-coupling, a right half-coupling, multiple fastening pins, multiple fastening nuts and multiple elasticsleeves. A surface where the left half-coupling and the right half-coupling are in contact is provided with a matching positioning device, which facilitates assembly and positioning and effectively solves the problem of wrong mounting. An integral shock absorbing pad is arranged between the left half-coupling and the right half-coupling, A shockproof sleeve and a shockproof washer are arranged onthe positioning device surface, which strengthens the shockproof performance of the coupling. In addition, the connecting surface side of the left half-coupling of the coupling is also provided withan oil filling hole communicating with a shaft hole so as to oil for rust prevention. The LT type elastic sleeve pin coupling has the advantages of simple structure, reasonable arrangement and low manufacturing cost, effectively reduces the wear and rust prevention problem between a coupling shaft and the hole, and has good use value.
Owner:JIANGSU ROKEE HEAVY IND TECH
Foundation treatment method
InactiveCN103628494ADelay uneven settlementIncrease stiffnessArtificial islandsUnderwater structuresSlagSoil horizon
The invention relates to the technical field of geotechnical engineering, in particular to a foundation treatment method. The foundation treatment method is characterized in that the mattress method is adopted, slag or medium sand or coarse sand or soil doped with stones or cohesive soil is used in a soil-rock combination ground, and the thickness of the mattress layer is 300-500mm; for the soil-rock combination ground with large difference in soil thicknesses, especially the position with large difference in compression amount of the ground, the width of a settlement joint is set to be enough, when the floor of a house is 2-3, the width of the settlement joint is 50-80mm, when the floor of the house is 4-5, the width of the settlement joint is 80-120mm, and when the floor of the house is more than 5, the width of the settlement joint is no less than 120mm; the post-cast strip method is adopted in the connection portion of a high layer and a low layer, the width is no less than 500mm, and the use function and water prevention problems of buildings due to the settlement joint are avoided. According to the combination mode, the independent foundation and one-column-one-pile mode is adopted, and the construction quality is guaranteed.
Owner:李应芝
Eyesight improving tea
InactiveCN102475177AHas the effect of clearing the liver and improving eyesightFit for drinkingTea substituesMedicineSemen
The invention relates to an eyesight improving tea, which comprises the following effective components by weight part: 14-17 parts of cassia occidentalis, 17-21 parts of semen cuscutae, 16-19 parts of milkvetch seed, 13-15 parts of onion seed, 13-16 parts of semen celosiae and 12-27 parts of chrysanthemum. The preparation method comprises the following steps: cleaning cassia occidentalis, semen cuscutae, milkvetch seed, onion seed and semen celosiae and then rolling, drying for later usage, uniformly mixing the above raw materials and chrysanthemum, split charging into small bags to obtain the product. The eyesight improving tea has the efficacies of clearing liver and improving eyesight, and is suitable for drinking by people with eyesight prevention problem.
Owner:丁小燕
Pan granulation atomization dust collector
InactiveCN102861534AAdd water evenlyReduce drift lossGranulation in rotating dishes/pansCircular discEngineering
The invention discloses a pan granulation atomization dust collector, which is characterized in that a water filling pipe is transversally arranged at the middle position in a tank body of a pan granulator; one end of the water filling pipe is provided with a first regulating switch; the upper part in the tank body is transversally provided with a plurality of high-pressure atomizers through a pipeline; a high-pressure pump is connected with the other end of the pipeline; and the pipeline is provided with a second regulating switch. According to the pan granulation atomization dust collector disclosed by the invention, not only is the dust prevention problem of pan granulation solved but also the material drift loss can be reduced.
Owner:山东坤基沃业生物科技股份有限公司
After-combustion preventing gangue pile platform with checkerboard-shaped ditches, and grouting method thereof
InactiveCN108744338ASolve the problem of preventing spontaneous combustionImprove stabilityFire rescueSpontaneous combustionEngineering
The invention relates to a method for preventing after-combustion of gangue piles, and concretely relates to an after-combustion preventing gangue pile platform with checkerboard-shaped ditches, and agrouting method thereof. The method for preventing after-combustion is characterized in that the easy deforming, fracturing and spontaneous combustion parts of the gangue pile platform and its surrounding gentle slope are trenched in a checkerboard manner after the fire of the spontaneous combustion gangue piles is extinguished, and are grouted. The method has the advantages of easiness in operation, significant effect, long lasting time, solving of the spontaneous combustion prevention problem of the gangue pile platform, improvement of the integral stability of a gangue dump, and further solving of the selection problem of a grouting material and the monitoring of the temperature and the processing of a backfill layer after the grouting.
Owner:山西绿巨人环境科技有限公司
Dust prevention support of hung type automobile detection displayer
The invention discloses a dust prevention support of a hung type automobile detection displayer. The dust prevention support comprises an installation plate, wherein the whole installation plate is in a rectangular shape. A hanging rod is arranged on one face of the installation plate, the axis of the hanging rod is parallel to the installation plate, a plurality of assembling holes are formed in the installation plate, a detachable transparent dustproof cover is arranged on the installation plate, and the transparent dustproof cover and the hanging rod are located on the two faces of the installation plate respectively. According to the dust prevention support of the hung and adjustable type automobile detection displayer, the transparent dustproof cover is arranged after the displayer is fixed to the installation plate, and therefore the dust prevention problem and the collision prevention problem of the displayer can be effectively solved; after the dust prevention support is used for a period of time, a user only needs to take down and clean the transparent dustproof cover, the dustproof cover can be repeatedly used, and therefore damage to the displayer is avoided; the problem that a traditional displayer which is hung through a rope shakes and swings is solved, and the safety problem caused when a tester can not see the displayer clearly and the displayer shakes is solved. The dust prevention support has high universality and connection strength and has the advantages of being convenient to use and durable in use.
Owner:CHENGDU IYASAKA TECH DEV
Tamping-proof monitoring device for drilling platform turntable surface of drilling machine used for petroleum exploration
InactiveCN101210488ATimely brakingSolve the anti-smash problemAutomatic control for drillingEngineeringJoint Test Action Group
The invention relates to a monitoring device for breaking prevention of the surface of a turntable on a derrick floor of a drilling machine for oil exploration, which is characterized in that: the monitoring device comprises a transducer of a photoelectrical encoder, a breaking-prevention controller and a hydraulic-controlled proportional valve; wherein the transducer of the photoelectrical encoder is connected with the hydraulic-controlled proportional valve via the breaking-prevention controller. The breaking-prevention controller is composed of an FPGA, a photoelectric isolation circuit, a JTAG port, operating keys, a power isolation module, a signal amplification circuit, a power amplification circuit, an indicator light, an LCD module and a crystal oscillation circuit; wherein the FPGA is connected with the photoelectric isolation circuit, the JTAG port, the operating keys, the power isolation module, the signal amplification circuit, the indicator light, the LCD module and the crystal oscillation circuit respectively; the photoelectric isolation circuit is connected with signal input of the transducer; the signal input of the transducer, the power isolation module and the power amplification circuit are connected with power input of 24V; and the power amplification circuit is connected with drive output of an electromagnetic valve. The invention has the advantages of resolving the spot breaking-prevention problem of the surface of the turntable on the derrick floor, reducing accident potential and improving the spot safety.
Owner:SHANGHAI GASOLINEEUM & CHEM EQUIP +2
Method for viewing specific section display area and realization method thereof
ActiveCN105957489ANormal display screenImprove shortcomingsStatic indicating devicesGraphicsPower flow
The invention relates to a method for viewing a specific section display area and a realization method thereof. An upper display layer is arranged above a lower display layer in a digital device screen and laminated, the upper display layer is a transparent or light-transmitting display panel, the upper display layer and the lower display layer are connected with a digital device processor, the upper display layer controls all or partial area through current, and the upper display layer and the lower display layer are from the same signal source; the upper display layer includes a similar color display area, a similar color display area boundary, an adjacent color display area and an adjacent color display area boundary, and a transparent and light-transmitting area is distributed between the similar color display area and the adjacent color display area; and the lower display layer includes a sampling operation area, a sampling operation area boundary, an adjacent sampling operation area and an adjacent sampling operation area boundary. The peep prevention problem of the screen can be solved, and ghost and light and shade change do not appear so as to have the effect of graphic interference on peeping of others.
Owner:东莞市健耀烨电子科技有限公司
Identity authentication method, identity authentication equipment, server and identity authentication-based encryption method
ActiveCN102035654BNo tamperingSolve the anti-counterfeiting problemUser identity/authority verificationHandwritingDigital signature
Owner:BEIJING WATCH DATA SYST
A mine-used voltage-type high-voltage explosion-proof frequency converter
ActiveCN104124856BSolve explosion-proofReduce volumeCooling/ventilation/heating modificationsPower conversion systemsEngineeringHigh pressure
Owner:武汉合智数字能源技术有限公司
Hidden lock
InactiveCN106014002APrevent smugglingWill not affect normal useLocks for portable objectsOther accessoriesPasswordMechanical engineering
The invention discloses a hidden lock which comprises a supporting column connected with a suitcase. The middle of a lock sleeve is fixed to the top end of the supporting column. The lock sleeve is of a hollow structure. A tapered end is inserted into the left side of the lock sleeve, and the front portion of the tapered end stretches into the lock sleeve. A circular plate is arranged at the tail of the tapered end. A tapered end supporting column is connected to the back face of the circular plate. A spring wire is connected to the tail of the tapered end supporting column. The right end of the lock sleeve is fixed by the tail end of the spring wire. On the basis of elasticity of the spring wire, when the hidden lock does not need to be used, the tapered end can be automatically retracted into a handle of a pull rod, and normal use of the handle will not be affected; when the hidden lock needs to be used, the tapered end is pulled out and inserted into a tail lock; a coded lock is adopted at the tail of the tapered end, carrying is convenient, a user just needs to remember a password when using the hidden lock, and the hidden lock has good practicability. The structure is attractive in appearance and symmetric in structure, has the good market prospect, and solves the problems that an existing suitcase has a single anti-theft function, emphasis is laid on theft prevention of the position of a zipper and the theft prevention problem of the suitcase is neglected.
Owner:GUIZHOU UNIV
Underground station exit and entrance structure and construction method thereof
PendingCN109853621ASolve anti-scouring problemsEnsure safetyArtificial islandsProtective foundationWater flowRail transit
The invention provides an underground station exit and entrance structure and a construction method thereof, and belongs to the field of rail transit. The underground station exit and entrance structure comprises a bottom plate, a top plate and side walls; the bottom plate comprises a sinking section, a climbing section and a horizontal passage section, wherein the sinking section is positioned below the elevation line of the maximum scouring depth, and a retaining wall capable of forming a closed structure is arranged between the sinking section and the ground; and a supporting surface is arranged between the retaining wall and the sinking section. According to the underground station exit and entrance structure and the construction method thereof, the sinking section, close to the ground, of the bottom plate of the exit and entrance structure is arranged below the elevation line of the maximum scouring depth, and the retaining wall capable of forming the closed structure is arrangedbetween the sinking section and the ground, so that the erosion prevention problem of the exit and entrance structure under a flood working condition is effectively solved, the situation that the bottom plate structure is disengaged and cantilevered due to a soil body under the bottom plate of a conventional exit and entrance structure being scoured by water flow under the maximum scouring depth is avoided, the safety of the exit and entrance structure is ensured, and the underground station exit and entrance structure and the construction method thereof can be applied to the construction of underground stations around flood flowing areas or flood discharge rivers.
Owner:牛斌
Management system and management method for correction and prevention problems
InactiveCN102708455AEasy to operateEasy to viewResourcesSpecial data processing applicationsManagement efficiencyComputer science
Disclosed are a management system and a management method for correction and prevention problems. The management method includes summarizing, classifying and integrating the correction and prevention problems input by all departments, matching implementing measures for the correction and prevention problems from historical data, receiving amendments for the implementing measures by users, recording departments or persons in charge of the implementing measures in all departments in the implementing measures after amendment, tracking and verifying performance circumstances of corresponding part of implementing measures by the departments or persons in charge, summarizing the performance circumstances of each part of measures into implementing results of the whole measures, and simultaneously, updating the historical data. According to the management system and the management method, unified management for correction and prevention problems and related information can be performed, compared with paper management methods, operation and view of users are facilitated, and management efficiency is greatly improved.
Owner:SHENZHEN POWER SUPPLY BUREAU +1
Converter circuit with bidirectional synchronization rectification and dead band self regulation
ActiveCN107070237AImprove efficiencyImprove reliabilityEfficient power electronics conversionDc-dc conversionPrevention problemsElectrical and Electronics engineering
The present invention discloses a converter circuit with bidirectional synchronization rectification and dead band self regulation. The circuit comprises a V1 side circuit and a V2 side circuit which are bilaterally symmetrical, the V1 side circuit comprises a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4, and the V2 side circuit comprises a MOS tube Q5, a MOS tube Q6, a MOS tube Q7 and a MOS tube Q8. The converter circuit with bidirectional synchronization rectification and dead band self regulation provides the scheme that the synchronous rectification technology is controlled in the bidirectional conversion state aiming at the bidirectional DC / DC conversion, the bidirectional synchronous rectification is realized aiming at the LLC topology, the synchronous rectification backward flowing prevention problem under the DC / DC bidirectional conversion is solved, and through adoption of the bidirectional rectification technology, the dead time self regulation is realized so as to solve the problem that the time an LLC dead band area is controlled in the limit state so that the ZVS is not possibly realized. The converter circuit with the bidirectional synchronization rectification and the dead band self regulation realize dead band regulation while realizing bidirectional synchronous rectification backward flowing prevention so as to greatly improve the efficiency and the reliability of the circuit, allow the LLC efficiency to be optimized and improve the EMC problem.
Owner:SHENZHEN WINLINE TECH
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