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115results about How to "Achieve mutual independence" patented technology

Precise two-degree of freedom micro-displacement positioning device

InactiveCN102623070AAchieve mutual independenceWill not affect positioning accuracyInstrumental componentsBridge typePiezoelectric actuators
The invention relates to a precise two-degree of freedom micro-displacement positioning device, belonging to a micrometric displacement operating system. In order to solve the defects of the prior art, including the problems that the positioning precision is low and interference between different degrees of freedom is large, the device comprises an objective table, a base plate, four nested parallelogram flexible link mechanisms with same shapes and structures, four groups of parallelogram guide mechanisms with same shapes and structures, a first piezoelectric actuator and a second piezoelectric actuator. The precise positioning device has the beneficial effects that a bridge type amplification mechanism is eliminated, a driving mode is changed, and the positioning precision is improved as the piezoelectric actuators are adopted for driving directly; two different flexible link mechanisms are adopted for the device, so as to realize the mutual independent movement of each degree of freedom; as no disturbance exists between the degrees of freedoms, the positioning precision is further improved; and furthermore, the whole structure is completely symmetric except for the piezoelectric actuators, thereby ensuring that the positioning precision of the whole device is not affected during change of the outside temperature conditions.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Azimuth device applicable to vehicular photoelectric turntable

The invention discloses an azimuth device applicable to a vehicular photoelectric turntable. The azimuth device comprises a revolving shaft system, an azimuth shell, a rotary transformer and a torque motor. The revolving shaft system comprises an azimuth dead shaft, an azimuth moving shaft, an azimuth rotating adaptor disc and two groups of bearings, the azimuth dead shaft is connected with the azimuth moving shaft and the azimuth rotating adaptor disc respectively via a first bearing and a second bearing, the first bearing bears biaxial loads, the second bearing is larger in diameter and bears radial and tipping loads, and thereby the rotating disc type revolving shaft system borne by the internal and external bearings is formed. The revolving shaft system as well as the rotary transformer and the torque motor are respectively positioned on an upper side and a lower side of an annular transverse plate in the middle of the azimuth shell and are independent to one another. Furthermore, a comprehensive labyrinth felt collar sealing structure is adopted. The azimuth device has the advantages of simple structure, low height, light weight, good maintainability, excellent expansibility, strong environmental suitability and the like, mechanical characteristics and capabilities of resisting shock, vibration and large-angle inclination of the photoelectric turntable are effectively improved, and tracking precision of photoelectric tracking equipment is guaranteed.
Owner:西安应用光学研究所

Transparent wireless sensor network/time division-synchronization code division multiple access (WSN/TD-SCDMA) gateway based on internet protocol version 6 (IPv6)

The invention relates to transparent gateway equipment for connecting a wireless sensor network (WSN) and a time division-synchronization code division multiple access (TD-SCDMA) network based on an internet protocol version 6 (IPv6). The transparent gateway equipment comprises an advanced RISC machine 9 (ARM9) control unit and a WSN subnet access unit, wherein the ARM control unit mainly relates to an internet protocol (IP) layer and a media access control (MAC) layer of an open system interconnection (OSI) seven-layer model, is used for finishing protocol conversion, internetworking, route forwarding and the like, and adopts a transparent protocol conversion manner; the WSN subnet access unit mainly relates to a network layer, an MAC layer and a physical (PHY) layer of Institute of Electrical and Electronic Engineers 802.15.4c (IEEE802.15.4c), is used for networking and accessing of WSN subnet, collecting a subnet data and then transmitting the subnet data to the ARM9 control unit through a serial port. A jump channel technology is adopted in the MAC layer, a next time channel determinant mechanism is used and a channel quality value Pn is set so that the anti-interference performance of WSN equipment is improved and interfered channels are shielded; the TD-SCDMA network is accessed by utilizing a modem. The transparent gateway equipment solves the problem of convergence between the WSN and the TD-SCDMA common communication network, and the connection and data transmission between an IPv6-based WSN network and an IPv6-based cable network are realized.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Five-phase permanent magnet fault-tolerant motor with magnetic congregating effect for electric vehicle

The invention discloses a five-phase permanent magnet fault-tolerant motor with a magnetic congregating effect for an electric vehicle. An outer rotor is arranged on a stator outer ring, armature teeth and fault-tolerant teeth are uniformly distributed at intervals along the circumferential direction of the stator outer ring, permanent magnets are uniformly and radially embedded in the direction of the circumference in the outer rotor, a single-layer concentrated winding is wound on the armature teeth, radially opposite dipolar single-layer concentrated windings are serially connected to form one phase; total tooth quantity of the armature teeth and the fault-tolerant teeth is a multiple of 10 and is not equal to the quantity of permanent magnets, and the difference of the total tooth quantity of the armature teeth and the fault-tolerant teeth does not exceed +/-4; rotor grooves with same quantity as the permanent magnets are arranged on the outer rotor and positioned between each of the permanent magnets and the stator; and the width of the armature teeth is two times of that of the fault-tolerant teeth. The flux leakage of the permanent magnets is reduced while a magnetic-gathering effect is generated, the consumption of the permanent magnets is reduced, the motor cost is saved, the motor weight is reduced, and the reliability and the failure operation capacity of the motor is improved.
Owner:JIANGSU UNIV

Support method for underground goaf roof of coal mine

ActiveCN102900449ASubsidence deformation is smallSolve the puzzle of disruptive relocationAnchoring boltsSpelunkingLithology
The invention relates to a support method for an underground goaf roof of a coal mine, and belongs to the technical field of mining techniques and environmental protection. The method comprises the following steps: getting the initial caving interval of an immediate roof of an underground working face of the coal mine and the initial fracture length of a main roof, as well as the lithology and the thickness of each of the immediate roof and the main roof; adopting an anchor rod, an anchor beam and an anchor rope to synchronously support the immediate roof of a goaf during the process of forming the goaf according to the initial caving interval of the immediate roof; determining the type and length of each of the anchor beam, the anchor rope and the anchor rod for constituting a support structure, as well as the inter-row spacing among the anchor beam, the anchor rope and the anchor rod; adopting steel beam columns or preformed reinforced concrete beam columns to support the main roof through the immediate roof of the goaf within the range that the unsupported back span of the goaf is less than the initial fracture length of the main roof; determining the type, length and inter-row spacing of the steel beam columns or the preformed reinforced concrete beam columns; and operating till the completion of the propulsion work on the working face. The method has the characteristics of simple method, easiness in operation and capabilities of controlling the roof and avoiding caving.
Owner:BEIJING YZH COAL ENG DESIGN

Edge router for 6LoWPAN IPv4 Internet access and access method

The invention provides an edge router for 6LoWPAN IPv4 Internet access and an access method, and provides a mechanism for accessing (IPv4) Internet on the basis of an IPv6 sensing network, and the mechanism is used for solving the interconnecting problem of the sensing network and the Internet. The edge router has the advantages that the network middleware mode is used for expanding the function of the 6LoWPAN edge router, so that the transparent gateway effect is achieved. An ARM9 (advanced RISC machine 9) control unit comprises a 6LoWPAN protocol stack and a TCP/IP (transmission control protocol/Internet protocol) stack, the heterogeneous protocol conversion, routing forwarding and the like are completed, in addition, a uNAT-PT (micro network address translation-protocol translation) mechanism is added to the network layer of the TCP/IP stack, and dynamic address mapping and protocol translation are adopted for realizing the conversion between an IPv4 data packet and an IPv6 data packet. The addition of new network equipment to the whole communication system and the modification of any network protocol stack are not needed, the fusion problem of the sensing network based on IPv6 and the Internet network can be solved, the system structure is simple, economic and convenient, and the seamless fusion between the heterogeneous networks and the service extension can be favorably accelerated.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Well completion production pipe string capable of mining at lower part and injecting at upper part and with electric submersible pump

The invention discloses a well completion production pipe string capable of mining at the lower part and injecting at the upper part and with an electric submersible pump. The well completion production pipe string comprises a bushing capable of mining at the lower part and well injecting at the upper part, an oil pipe arranged in the bushing and a downhole tool arranged on the oil pipe. The downhole tool comprises a downhole safety valve arranged at the upper part of the oil pipe and connected with a hydraulic control pipeline and a bushing layering packer arranged at the bottom of the oil pipe and provided with a sealing barrel. The bushing layering packer is provided with a positioning sealing part in a matched mode. An over-cable production packer with an air releasing valve, a workingbarrel and a sealed electric submersible pump system are connected between the downhole safety valve and the positioning sealing part in sequence from top to bottom. An upper reservoir and a lower reservoir of the bushing are separated through the bushing layering packer. A positioning sealing guiding shoe is arranged at the lower end part of the oil pipe. According to the well completion production pipe string, the facts that precise water injecting of the upper reservoir is achieved through an annulus access and pumping production or precise water injecting of the lower reservoir is achieved through a sealing system and a channel in the oil pipe are achieved, and the annulus access and the channel in the oil pipe are independent and noninteracting, so that the upper reservoir and the lower reservoir of one well are controlled independently, and the cost of oilfield development and maintenance is reduced.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Vehicle power supply system and power supply control method

The invention discloses a vehicle power supply system and a power supply control method. The vehicle power supply system comprises a first power supply module, a second power supply module, a controlmodule and a power switch module, wherein the second power supply module is externally connected with a load through the power switch module, the first power supply module is externally connected withthe load, and the control module is connected with the load and the power switch module; the first power supply module is used for supplying power to the load; the control module is used for detecting the power supply condition of the first power supply module to the load, generating a switching signal based on the load power supply condition and sending the switching signal to the power switch module; the power switch module is used for determining a switching state of the power switch module based on the received switching signal; and the second power supply module is used for supplying power to the load based on the switching state of the power switch module. According to the embodiment of the invention, the control module detects the power supply conditions of the power supply modulesto the load, generates the switching signal according to the power supply conditions to control the state of the power switch modules, realizes mutual independence and no mutual influence of the twopower supply modules, and meets power supply requirements of automatic driving.
Owner:CHINA FIRST AUTOMOBILE

Template system for building concrete structure at earth-taking opening in top-down construction method, and construction method

The invention discloses a template system for building a concrete structure at an earth-taking opening in a top-down construction method, and a construction method, relates to the technical field of top-down method construction of constructional engineering, and aims at a problem of slowing down the engineering progress because a template needs to be set at a conventional earth-taking opening layer by layer, and floor concrete needs to be poured layer by layer. The template system comprises at least two suspended steel beams which are disposed at the top layer and at two sides of the earth-taking opening. Two adjacent suspended steel beams are fixedly connected with each other through a connection beam. Each suspended steel beam is connected with at least two groups of hanging bars. A plurality of template assemblies which are arranged longitudinally in the earth-taking opening are sequentially connected with the hanging bars in a movable connection. The template assemblies abut against structural columns located at two sides of the template assemblies, and the upper surface of the template assembly is aligned with the lower surface of a corresponding floor slab. The construction method comprises the steps: installing the above system at the earth-taking opening; binding steel bars in the template assemblies at the same time, and obtaining a plurality of connection boards through pouring concrete, wherein each connection board is fixedly combined with the corresponding floor slab; removing the template system after the connection boards are hardened, and completing the complemented construction of the floor slabs.
Owner:NO 2 CONSTR GRP CO LTD OF SHANGHAI CONSTR GRP

Intelligent archive cabinet management control system

The invention provides an intelligent archive cabinet management control system. The system comprises a data acquisition unit, a data storage unit, an analysis unit, a data management unit, an alarm unit and a display unit which are in signal connection with one another sequentially; the data acquisition unit comprises an archive data acquisition module and an environmental data acquisition module; the analysis unit includes an archive data analysis module and an environmental data analysis module; the data management unit includes an RFID management module, wherein the RFID management moduleincludes an intelligent access control management module, a vehicle quantity check management module, and a dedicated archive label management module; the alarm unit includes an isolation module and an emergency air protection module; and the display unit includes a three-dimensional scene display module and a real-time data display module. With the intelligent archive cabinet management control system adopted, not only can statistics be performed on document information, but also archive data can be managed in a unified manner, and therefore, relevant personnel can be facilitated to perform monitoring, consultation and statistics, and isolation protection can be realized when problems appear.
Owner:河南管软信息技术有限公司

Semiconductor structure and forming method thereof

The invention discloses a semiconductor structure and a forming method thereof, and the semiconductor structure comprises a first device structure which comprises a first substrate and a first device formed on the first substrate, the first device comprises a first channel layer structure located on the first substrate, a first device gate structure crossing the first channel layer structure, and first source-drain doped regions located in the first channel layer structure on the two sides of the first device gate structure; the second device structure is positioned on the front surface of the first device structure and comprises a second substrate positioned on the first device structure and a second device formed on the second substrate; the second device comprises a second channel layer structure located on the second substrate, a second device gate structure crossing the second channel layer structure, and second source-drain doped regions located in the second channel layer structure on the two sides of the second device gate structure; projections of the second channel layer structure and the first channel layer structure on the first substrate are not vertically intersected. According to the invention, electrical leading-out of the first device can be realized.
Owner:SEMICON MFG INT (SHANGHAI) CORP +1
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