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33results about How to "Overcome trouble" patented technology

Low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system

The invention discloses a low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system comprising a low-voltage multi-capacity capacitor, an automatic phase-change switch, residual current breakers, a power distribution network monitoring terminal and a system platform. The power distribution network monitoring terminal is connected with the system platform via a GPRS network. The residual current breakers are installed on all power supply branches of a power distribution network low-voltage side which is series-connected with the low-voltage multi-capacity capacitor. The residual current breakers are connected with the monitoring terminal via a 485 communication mode. The automatic phase-change switch is connected with the power distribution network monitoring terminal via a wireless electric power carrier. The low-voltage multi-capacity capacitor comprises multiple isometric charging elements which are connected in parallel. Parallel-connection wires of the isometric charging elements are connected in series with electric control switches so that capacitance compensation level matching is realized. Three-phase load balancing automatic adjustment and reactive compensation capacity level matching can be realized so that electric energy loss in a transformer area is reduced and frequency of three-phase automatic adjusting phase change in peak periods is reduced.
Owner:STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY +2

Multi-layer foam dressing for negative pressure closed drainage and preparation method thereof

The invention provides a multi-layer foam dressing for negative pressure closed drainage and a preparation method thereof. The multi-layer foam dressing for negative pressure closed drainage comprises a negative pressure conduction layer; the lower part of the negative pressure conduction layer is provided with a drainage protection layer which is contacted with a wound surface or a wound cavity; the negative pressure conduction layer and the drainage protection layer are porous foam material layers; the negative pressure conduction layer is a hydrophobic porous foam material layer; the drainage protection layer is a hydrophilic porous foam material layer; the two layers of materials are fixedly connected and pores mutually penetrate and are communicated. Two longitudinal broken joints are formed on the multi-layer porous foam dressing; the longitudinal broken joints are formed at the installation positions of negative pressure drainage tubes, and extend to the middle part of the multi-layer porous foam dressing from the installation ends of the negative pressure drainage tubes by passing through the installation positions of negative pressure drainage tube holes. The thickness a of the negative pressure conduction layer is 0.5cm to 10cm, the pore diameter is 1mm to 2.5mm, the thickness b of the drainage protection layer is 0.1cm to 3.5cm, and the pore diameter is 0.2mm to 1mm. Meanwhile, the invention also provides a splicing method and a compound method for preparing the foam dressing. According to the dressing and the method, a multi-layer structure is adopted, so that the negative pressure conduction performance can be effectively improved while the material safety is ensured; in addition, blockage does not easily occur during a use process, the permeability is stable, and the treatment effect is excellent.
Owner:WUHAN VSD MEDICAL SCI & TECH CO LTD

Low-voltage three-phase load unbalance automatic regulation system

The invention discloses a low-voltage three-phase load unbalance automatic regulation system, which comprises a monitoring system platform and a monitoring terminal, wherein the monitoring terminal is connected with the monitoring system platform through a communication network. The low-voltage three-phase load unbalance automatic regulation system is characterized by also comprising a rest current circuit breaker and an automatic reversing switch, wherein the rest current circuit breaker is connected with the monitoring terminal through a 485 communication mode, and the automatic reversing switch is connected with the monitoring terminal through a wireless electric carrier wave communication mode. After the adoption of the structure, the history of artificial three-phase load balance regulation in the paste dozens of years is changed, the defects of inaccuracy and trouble caused by meter box unit current estimation and time-phased measurement on each branch phase line current for three-phase load balance regulation are overcome, in addition, the automatic regulation of the three-phase line load unbalance and monitoring and improvement of line terminal low-voltage are realized, the marketing management and monitoring on the transformer oil temperature and low-pressure side wire outlet head temperature are realized, and the power supply efficiency is improved.
Owner:国网山东平阴县供电公司 +1

Bidirectional steel and oxygen supplying method of converter steelmaking

The invention provides a bidirectional steel and oxygen supplying method of converter steelmaking, comprising the following steps: respectively performing oxygen lance design and calculation to two different charge weights, and determining the design parameters of two oxygen lances, wherein, the design parameters comprises data such as oxygen supply intensity of oxygen lances with different chargeweights, oxygen pressure at 30De-45De, oxygen amount, lance position, oxygen jet flow shocking depth and the like; calculating liquid level height difference of different charge weights at a converter molten pool; during practical production, using oxygen lances with smaller tons of charge weight; when charge weight is in smaller ton, oxygen lance operation has the practical performing parameteras follows: oxygen pressure is performed according to design parameter lower limit of the oxygen lance with smaller tons of charge weight, and other operation parameters are performed according to design parameter middle limit of the oxygen lance with smaller tons of charge weight. The invention is an oxygen supplying method that an oxygen lance spray nozzle is used in converter steelmaking for being repeatedly adaptive to two different charge weights (differing for more than 20%), and solves the difficulty of bidirectional steel supplying of converters.
Owner:WUHAN IRON & STEEL (GROUP) CORP

Multi-layer foam dressing for negative pressure sealing drainage and manufacturing method thereof

The invention provides a multi-layer foam dressing for negative pressure sealing drainage and its manufacturing method. The multi-layer foam dressing for negative pressure sealing drainage includes a negative pressure conduction layer, which is arranged at the lower part of the negative pressure conduction layer for contact with the wound surface or The drainage protection layer in contact with the wound cavity, the negative pressure conduction layer and the drainage protection layer are both porous foam material layers; the negative pressure conduction layer is a hydrophobic porous foam material layer, and the drainage protection layer is a hydrophilic porous foam Material layer, two layers of materials are fixedly connected and the pores are infiltrated and communicated with each other. There are two longitudinal fractures on the multi-layer foam dressing, the longitudinal fractures are located at the position where the negative pressure drainage tube is installed, and one end of the negative pressure drainage tube is installed through the position where the hole of the negative pressure drainage tube is installed to extend to the multi-layer The middle of the foam dressing. The thickness a of the negative pressure conducting layer is 0.5-10 cm, and the pore diameter is 1-2.5 mm. The thickness b of the drainage protection layer is 0.1-3.5 cm, and the pore diameter is 0.2-1 mm. Simultaneously, the invention also provides two methods of making the above-mentioned foam dressing, bonding and compounding. The invention adopts a multi-layer structure, which can effectively improve its negative pressure conduction performance while ensuring the safety of the material, and is not easy to be blocked during use, has stable permeability and excellent therapeutic effect.
Owner:WUHAN VSD MEDICAL SCI & TECH CO LTD

Running method for intelligent body-building and auxiliary medical equipment and equipment thereof

InactiveCN101788796AReach fitnessAchieve the effect of exerciseComputer controlSimulator controlMedical equipmentBlood pressure
The invention relates to a running method for intelligent body-building and auxiliary medical equipment and equipment thereof. The equipment comprises an intelligent control system and an electromechanical executing system controlled by the intelligent control system. The running method comprises the following steps: 1) a control program is programmed and input into the intelligent control system so as to set more than one running modes; 2) databases are respectively established according to the running modes one by one and running parameters are set; 3) the equipment is powered on for self detection, and the databases are loaded; 4) a sensor automatically collects such data as user information and time and automatically inputs the data into the intelligent control system; 5) the control program automatically selects the running mode and the running parameters according to the above data so as to drive the electromechanical executing system to carry out execution. The invention further discloses the equipment for running the method. The invention can monitor such physiological parameters as blood pressure and pulse of a user, so as to help the user achieve the effects of body-building and exercising.
Owner:DONGGUAN GOSCIEN ELECTRICAL & MECHANICAL TECH SERVICES

Combined system of hydraulic pump and engine for multifunctional road sweeper

The present invention relates to a combined system of a hydraulic pump and an engine for a multifunctional road sweeper. The combined system includes an engine and a hydraulic system. The engine comprises a transmission, and a lubrication system that comprises an oil out passage and an oil in passage. The hydraulic system comprises a gear pump. The gear pump is connected to the transmission by means of a drive mechanism. The drive mechanism comprises a drive shaft, a bearing, a bearing block and a drive gear, where an oil filling hole is formed in the bearing block; the bearing block is disposed on the transmission; the drive gear is located in the transmission to engage with gears of a gear set in the transmission; and an inner hole is formed in the other end of the drive shaft. A main shaft of the gear pump is disposed in an inner hole formed in the other end of the drive shaft. The gear pump is disposed on the bearing block. The combined system also includes an oil pipe, an oil pipe socket A, and an oil pipe socket B, where the oil pipe socket A is disposed on the oil filling hole formed in the bearing block of the drive mechanism; one end of the oil pipe is disposed on the oil pipe socket A; the oil pipe socket B is disposed on the oil out passage; and the other end of the oil pipe is disposed on the oil pipe socket B.
Owner:JINGSU YUEDA SPECIAL VEHICLE CO LTD

Intelligent parking lot and navigation method based on quadcopter

ActiveCN105388913BSolve parking problemOvercoming the problem of autonomously looking at road signs to find parking locationsInstruments for road network navigationTransmission systemsEngineeringMarine navigation
The invention relates to an intelligent parking lot based on a four-axis aircraft and a navigation method. The intelligent parking lot comprises the four-axis aircraft and a cloud computing server. When a vehicle drives in the intelligent parking lot, the four-axis aircraft takes off, flies to the periphery of the vehicle, navigates the vehicle according to a navigation planned path transmitted by the cloud computing server, obtains environment data around the vehicle in real time and transmits the environment data to the cloud computing server; when an owner finds a vehicle parked in the intelligent parking lot, the four-axis aircraft takes off, flies to the periphery of the owner, performs navigation for the owner according to a navigation planned path transmitted by the cloud computing server, obtains environment data around the owner in real time and transmits the environment data to the cloud computing server. The cloud computing server is used for generating and transmitting the navigation planned paths to the four-axis aircraft. By the adoption of the intelligent parking lot, of the structure, based on the four-axis aircraft and the navigation method, a user can conveniently and fast enter and exit from a parking space nearby, navigation is more visual and stereoscopic, and interestingness, entertainment and science and technology feeling of parking are improved.
Owner:SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE

Human body heart rate variability and respiration rate measuring method based on variational mode decomposition and constrained independent component analysis

The invention discloses a human heart rate variability (HRV) and respiratory rate (RR) measurement method based on variational mode decomposition (VMD) and constrained independent component analysis (cICA), which comprises the following steps: performing pixel coherent average operation on human face video data, converting the human face video data into RGB observation signals, and performing preprocessing operation on the RGB observation signals to realize standardization. Performing four-channel decomposition on the G-channel signal by using a VMD algorithm, and solving a reference signal of a blood flow pulse (BVP) on the basis of the component with the maximum spectrum peak value in the decomposed four-channel components; based on the reference signal, a cICA algorithm is used for separating a BVP source signal from the RGB observation signal, a VMD algorithm is used for conducting four-channel decomposition on the BVP source signal, high-quality pulse wave components are extracted from the separated four-channel components, and HRV parameters and RR are further obtained. According to the method, the inherent source sorting fuzzy problem in a traditional blind source separation/independent component analysis algorithm can be avoided, and the method has good noise interference resistance and has good application prospects in the field.
Owner:ANHUI UNIVERSITY +1

Bidirectional steel and oxygen supplying method of converter steelmaking

The invention provides a bidirectional steel and oxygen supplying method of converter steelmaking, comprising the following steps: respectively performing oxygen lance design and calculation to two different charge weights, and determining the design parameters of two oxygen lances, wherein, the design parameters comprises data such as oxygen supply intensity of oxygen lances with different charge weights, oxygen pressure at 30De-45De, oxygen amount, lance position, oxygen jet flow shocking depth and the like; calculating liquid level height difference of different charge weights at a converter molten pool; during practical production, using oxygen lances with smaller tons of charge weight; when charge weight is in smaller ton, oxygen lance operation has the practical performing parameteras follows: oxygen pressure is performed according to design parameter lower limit of the oxygen lance with smaller tons of charge weight, and other operation parameters are performed according to design parameter middle limit of the oxygen lance with smaller tons of charge weight. The invention is an oxygen supplying method that an oxygen lance spray nozzle is used in converter steelmaking for being repeatedly adaptive to two different charge weights (differing for more than 20%), and solves the difficulty of bidirectional steel supplying of converters.
Owner:武钢集团有限公司

Working condition monitoring and three-phase load balance automatic adjustment system in low-voltage station area

The invention discloses a system for monitoring the working condition of a low-voltage station area and automatically adjusting the three-phase load balance, which includes a low-voltage multi-capacity capacitor, an automatic phase change switch, a residual current circuit breaker, a distribution network monitoring terminal, and a system platform. The network monitoring terminal is connected to the system platform through the GPRS network, and the residual current circuit breaker is installed on each power supply branch on the low-voltage side of the distribution network with the low-voltage multi-capacity capacitor connected in series. The residual current circuit breaker is connected through the 485 communication mode It is connected with the monitoring terminal, and the automatic reversing switch is connected with the monitoring terminal of the distribution network through the wireless power carrier, wherein the low-voltage multi-capacity capacitor includes a plurality of parallel-connected equal-capacity charging elements, and the parallel-connected lines of the equal-capacity charging elements The electric control switch is connected in series to realize the matching of capacitance compensation level. The invention can realize the automatic adjustment of the three-phase load balance and the matching of the reactive power compensation capacity level, reduce the electric energy loss in the station area, and reduce the frequency of the three-phase automatic adjustment and commutation in the peak period.
Owner:STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY +2

Monitoring collection instrument of impact force of running vehicle on two sides of road and railway tunnels

The present invention provides a monitoring collection instrument of an impact force of a running vehicle on two sides of road and railway tunnels. The instrument comprises a pressure probe, a microclimate support, a data receiving system and a data processing storage system, and the pressure probe, an atmosphere pressure sensor and an air humiture sensor are disposed at two sides of a tunnel; the data receiving system and the data processing storage system are arranged at one side of the tunnel; and the microclimate support is arranged at the outer side of the tunnel portal. The monitoring collection instrument of impact force of the running vehicle on two sides of the road and railway tunnels is simple in structure, convenient to operate and easy to carry, can perform long-term monitoring of the air flow dynamic changing in the road tunnel and the city subway culvert and especially the impact shock-wave pressure of the high-speed running vehicle passing through the tunnel on the two sides of the culvert and provides necessary scientific basis for the development and research of the road and railway tunnel ventilation neural control energy saving and for the practical application and popularization of an intelligent control energy-saving system in the tunnel ventilation; and moreover, the monitoring collection instrument of impact force of the running vehicle on two sides of the road and railway tunnels can avoid risk aiming at the development of the system, reduce the cost, prolong the service life of the tunnel and improve the total economic and social benefits.
Owner:GANSU ROAD & BRIDGE CONSTR GROUP

Hydraulic anti-rotation self-unlocking device and hoisting and transporting vehicle using same

The invention relates to a hydraulic anti-rotation self-unlocking device which comprises an anti-rotation self-unlocking hydraulic cylinder (1) and a rotary locking face (2), when the anti-rotation self-unlocking hydraulic cylinder (1) is not subjected to hydraulic pressure, a friction locking block (16) is tightly pressed on the rotary locking face (2) to achieve the anti-rotation locking effect, and when the anti-rotation self-unlocking hydraulic cylinder (1) is subjected to hydraulic pressure, the friction locking block (16) is tightly pressed on the rotary locking face (2) to achieve the anti-rotation locking effect. And the friction locking block (16) does not tightly press the rotary locking surface (2) any more to automatically release the locking effect. A hydraulic anti-rotation self-unlocking device is arranged on a crane (6) of the hoisting transport vehicle, an anti-rotation self-unlocking hydraulic cylinder (1) is installed on a base (61), and a friction locking block (16) is matched with a rotating face on a hoisting rotating seat (62). Mechanical devices which are in running fit with each other are automatically locked and unlocked in a hydraulic mode, a locking pin rod does not need to be manually inserted and pulled to prevent rotation between parts and unlock, and the hydraulic locking device is convenient and safe to use.
Owner:牡丹江盛泰汽车制造有限公司

Field multipath digital earth-surface shear stress dynamic monitor

The invention relates to a field multipath digital earth-surface shear stress dynamic monitor which is characterized in that each earth surface shear head is connected with a main press nozzle, a main gas outlet nozzle, a subsidiary press nozzle and a subsidiary gas outlet nozzle, and is communicated with a micropressure difference transmitter through a respective silica gel hosepipe and a negative-pressure gas inlet nozzle and a positive-pressure gas inlet nozzle; and an output electrical signal of each micropressure difference transmitter passes through a negative signal line, a positive signal line, a transmitter power line negative end and a transmitter power line positive end to be welded with an aviation plug seat. An apparatus chassis is provided with a multipath plug seat; a bridge stabilized voltage supply, a multipath conversion circuit and a 485-to-USB head are arranged in the chassis; the bridge stabilized voltage supply is connected with the multipath conversion circuit; the 485-to-USB head is connected with a computer acquisition data storage and a computer data display through a 485 data line; and a solar cell panel is connected with a hermetically sealed lithium battery which powering the micropressure difference transmitter. The monitor provided by the invention has advantages of simple structure, multiple paths, accurate measurement, small volume and high intelligence, and can be suitable for field site and indoor wind tunnel test earth-surface smooth variation observation.
Owner:COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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