30results about How to "Simplify engineering design" patented technology

The invention discloses a magnetic flux feedback suspension control method and device of an EMS type low-speed aerotrain. The method comprises the following implementation steps: collecting and obtaining the magnetic flux density at the position of a suspension gap through a magnetic flux induction coil a, and collecting the suspension accelerated speed and the suspension gap; calculating a suspension system control rate according to the magnetic flux density, the suspension accelerated speed and the suspension gap; generating a closed loop to control PWM signals according to the suspension system control rate, and respectively outputting the PWM signals to a PWM driving circuit to adjust the suspension force between a suspension electromagnet and a track. The device comprises a sensor set, a data collection board, a suspension controller and the PWM driving circuit, wherein the sensor set, the data collection board, the suspension controller and the PWM driving circuit are sequentially connected. The method and device have the advantages of being good in suspension control stability, high in sensitivity, low in control bandwidth, capable of improving the stability and robustness of the suspension control system, simple, easy to implement, strong in anti-jamming capability, good in expandability, and flexible in implementation.

The invention discloses an optical fiber distribution system and a communication method thereof. The system is composed of an access unit, an extension unit and remote units; the access unit couples downlink radio frequency signals of 2G, 3G, LTE and other signal sources into the optical fiber distribution system to be converted into digital signals, and then performs framing, the digital signalsare converted into optical signals via photoelectric conversion, the optical signals are transmitted by an optical fiber to the extension unit or the remote units, and the extension unit forwards thedigital signals sent by the access unit to a plurality of remote units; and each remote unit converts the digital signals sent by the extension unit or the access unit into radio frequency signals toimplement the wireless coverage of 2G, 3G, LTE and other systems, and meanwhile converts the received uplink radio frequency signals into digital signals,and transmits the digital signals to the extension unit or the access unit. The optical fiber distribution system disclosed by the invention has the advantages of simple engineering design, high integration degree, easy implementation, monitoringavailability, good performance, low cost, etc.

The invention relates to a space foldable viscous damper. The space foldable viscous damper comprises folding units, oil cylinder type viscous damper bodies and structure connecting units, wherein each folding unit comprises a foldable rod which is hinged between a first plate and a second plate; two ends of each oil cylinder type viscous damper body are fixed between the first plate and the second plate; foldable rod connecting rods are arranged among the folding units; and the structure connecting units are connected with the foldable rod connecting rods. The space foldable viscous damper has the advantages that the oil cylinder type viscous damper bodies are integrated, and the damping and anti-seismic effect is improved. When the space foldable viscous damper is used in a frame structure, the oil cylinder type viscous damper bodies of the space foldable viscous damper are parallel to an upper beam, and therefore, the damping effect is maximum.

The invention provides a bypass device, method and a system for a nuclear power station instrument control system, and aims at solving the technical problems of coupling and increasing test workload by controlling the bypass device through software in the prior art. The device comprises a fiend signal receiving unit, a test signal receiving unit, a bypass signal receiving unit and a conduction control unit. The conduction control unit comprises a hardware control circuit. The hardware control circuit is arranged to convert the corresponding bypass signal into the analog signal inputted to thehardware control circuit based on the bypass signal received by the bypass signal receiving unit and control circuit conduction between the test signal receiving unit and the control station in the nuclear power plant instrument control system according to whether the hardware control circuit receives the analog signal. Therefore, the bypass function and the protection logic in the control stationcan be realized by the hardware circuit without coupling, and influencing the automatic logic by the bypass logic can be avoided.

The invention provides a method for relieving viaduct vehicle congestion. Elevators for automobiles to descent a viaduct are built in the middle or on two sides of the viaduct, the automobiles running in two directions on the viaduct are allowed to descend the viaduct through the nearby elevators for descending the viaduct, so that the density of built approach spans for descending the viaduct is reduced, the automobiles can descend the viaduct midway conveniently, the number of the built approach spans of the viaduct can be substantially decreased, the engineering design is simplified, the building cost is reduced, the construction cycle is shortened, the occupied land is reduced, vehicles can descend the viaduct midway conveniently, traffic congestion on and under the viaduct as well as fuel consumption can be reduced, the utilization rate of the viaduct is increased, and the environment is protected.

The invention relates to a three-dimensional parking method for viaduct vehicle parking, in particular to a using method of a three-dimensional garage used on a viaduct. Three-dimensional parking devices which are used for parking of motor vehicles and for making the vehicles be driven on or off the viaduct rapidly and conveniently at the same time are built on the two sides of the viaduct, motor vehicle drivers can select the operations of driving on the viaduct from a lower-layer highway, driving off the upper-layer viaduct to the lower-layer highway and parking the vehicles through the devices, and therefore, time and cost which are needed to build approach bridges are greatly reduced; meanwhile, the parking spaces of common roads can be added, and the limited land resources are effectively utilized; and the three-dimensional parking method for viaduct vehicle parking is low in cost, small in floor area, high in reusing degree and applicable to various urban overhead road sections.

The present invention discloses a novel load-bearing composite and a use thereof. The composite comprises the following components in parts by weight: 30-45 parts of unsaturated polyester resin, 0.8-3parts of initiator, 8-15 parts of polyurethane, 1-2.5 parts of low shrinkage additive, 1-2.5 parts of internal releasing agent, 0.8-3 parts of cross-linking agent, 0.8-1.5 parts of thickening agent,0.1-1 part of coupling agent, 40-55 parts of glass fiber, 4-10 parts of carbon fiber, 3-8 parts of aramid fiber, 1-5 parts of graphene, 0.1-0.5 part of nanoparticles of rare earth, 0.03-0.06 part of methyl stearate, and 0.05-0.15 part of ammonium chloride. The novel load-bearing composite in the present invention is lightweight with high mechanical properties.

The invention discloses a method for building an overall dynamic visual effect on a plurality of independent lighting devices. The plurality of independent lighting devices can be arranged into different patterns and arrays to form a group, and meanwhile, light-emitting parameters of a single independent lighting device are controlled through a random variable, so that the overall dynamic visual effect can be generated on the group formed by the plurality of independent lighting devices without carrying out unified regulation and control on the single independent lighting device through networking and the like.

The invention discloses a design method of an energy router DC voltage conversion circuit, and the design method is helpful for revealing the physical nature of an energy router DC voltage conversion-dual active bridge converter, and facilitates the comprehensive derivation, analysis and simplification of the control-output dynamics of different working modes, thereby avoiding the tedious numerical calculation required by control. The DC voltage conversion circuit designed by the invention is suitable for an energy router based on extended phase shift modulation, single phase shift modulation,double phase shift modulation and triple phase shift modulation. The method is simple in calculation, is high in model precision, is easy for practical engineering application, greatly improves the design efficiency of the DC voltage conversion of the energy router, reduces the current loss, and improves the DC voltage conversion efficiency.

The invention discloses 'a vehicle lifting machine rapidly getting on or off a bridge', and relates to the vehicle lifting machine rapidly getting on or off the bridge. The technical problem that an existing viaduct approach bridge is high in cost, few in number and different to seek is solved. According to the vehicle lifting machine rapidly getting on or off between the upper road surface and the lower road surface, efficiency of getting on or off the bridge of motor vehicles is greatly improved, and stress of ground traffic is relieved. According to the vehicle lifting machine rapidly getting on or off the bridge, the vehicle lifting machine which is used for getting on the bridge, getting off the bridge and is efficient, durable and low in cost is constructed through a large amount ofunused space between viaduct and the ground road, the multiple problems of the high cost, the long period and the large occupied area which are caused by approach bridge construction are solved, the problems are solved through the low cost and the small occupied area, and the present austere urban traffic situation is effectively improved.