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    • 2. 发明申请
    • Control System of Multi-Shaft Servo Motor
    • 多轴伺服电机控制系统
    • US20110127942A1
    • 2011-06-02
    • US13056308
    • 2008-11-11
    • Zhaoyong ZhouYajing LiuTiecai LiYan ZhangGuijie YangHongpeng Wang
    • Zhaoyong ZhouYajing LiuTiecai LiYan ZhangGuijie YangHongpeng Wang
    • G05B11/32
    • G05B19/414G05B19/4144G05B19/416G05B2219/42062G05B2219/42237H02P23/0004H02P25/03
    • The present invention relates to a control system of multi-shaft servo motor, wherein, comprises a position loop module (400) for receiving a position loop given value and a position feedback value of respective shelves and figuring out a velocity loop given value; a velocity loop module (500) for receiving the velocity loop given value and a velocity feedback value of respective shelves and figuring out a current loop given value; a current loop module (200) for receiving the current loop given value and a current feedback value of respective shelves and outputting a current loop output value; a PWM signal generation module (300) for receiving the current loop output value from the current loop module (200) and generating a PWM signal for controlling respective shelves of the servo motor; and a multi-shaft time sequence control module (700) for controlling the position loop module (400), the velocity loop module (500), the current loop module (200) and the PWM signal generation module to receive and process the signals.
    • 本发明涉及一种多轴伺服电动机的控制系统,其中包括位置环模块(400),用于接收位置环给定值和各个货架的位置反馈值,并计算速度环给定值; 速度环模块(500),用于接收速度环给定值和各个货架的速度反馈值,并计算当前回路给定值; 电流环模块(200),用于接收电流回路给定值和各个搁架的电流反馈值,并输出电流环路输出值; PWM信号生成模块(300),用于从电流回路模块(200)接收电流环路输出值,并生成用于控制伺服电动机的各个架子的PWM信号; 以及用于控制位置环模块(400),速度环模块(500),电流环模块(200)和PWM信号生成模块的多轴时序控制模块(700),用于接收和处理信号。
    • 6. 发明申请
    • Intelligent Pipeline Small Leaks and Thefts Detection Methods and Systems
    • US20180246004A1
    • 2018-08-30
    • US15443658
    • 2017-02-27
    • Yan Zhang
    • Yan Zhang
    • G01M3/24G01M3/28
    • G01M3/243G01M3/2815
    • Four (4) methods and systems that utilize these methods are claimed in the present invention for intelligently detecting pipeline small leaks, thefts, and their details.In the Energy Flow Line Method, the measured flow data at both ends of the pipeline will be monitored and analyzed. If flow changes that meet the criteria are identified, a leak or a theft is detected. The energy wave front speed is introduced and the unsteady flow mathematical model of the subject pipeline is utilized to calculate leak details.In the Filtered Pressure Waves Method, the measured pressure data at both ends of the pipeline will be monitored and analyzed. After filtering, only those pressure waves that are not originated at the ends of the pipeline will be selected as candidates. For each computation step, consecutively apply the 2 travelling time windows template 1 and template 2 to those candidates, and process those candidates within each window. Leaks, thefts and their details (except for leaked amount) can be obtained if the detected leak locations meet the criteria, even when the fluid is stagnant for some time.The Enhanced Filtered Pressure Waves Method, as the name suggests, is the enhanced version of the Filtered Pressure Waves Method if the fluid is not stagnant for some time. The essential part of the Energy Flow Line Method is used to extend the function not only to provide the leaked amount, but also to verify the leak and the leak location in order to avoid sending false alarms. The measured flow data at the outlet end of the pipeline is also monitored and the unsteady flow mathematical model of the subject pipeline is utilized. If the fluid is stagnant for some time, the leaked amount will be calculated without measured data to be compared. The estimated leak location will be provided with a search range.In the Mutual Confirmation Method, essential parts of the above 3 methods are utilized to extend the capability and to confirm each finding. If any result that contradicts the solution is identified, find a new one that fits. By providing the solution that is mutually confirmed with 2 sets of leak details, sending false alarms can be avoided. This method is particularly developed to solve some issues in the real time monitoring applications, especially in SCADA environments, to have shorter calculation time. The unsteady flow mathematical model of the subject pipeline is indispensable for this method. If the fluid is stagnant for some time, the leaked amount will be calculated without measured data to be compared. Also the estimated leak location will be provided with a search range.The present invention is suitable for most pipeline applications, including very long pipelines (for instance, over 200 km), existing pipelines (with min or no modification on existing sensor groups), and pipelines that are shut for some time (excluding using the Energy Flow Line Method), and easily used as a cross checking tool to other pipelines and other online leak detection systems. The fluids in pipelines can be gases, liquids, and multi-phase fluids.
    • 10. 发明申请
    • Fiber Optic Coupler Array
    • 光纤耦合器阵列
    • US20150316723A1
    • 2015-11-05
    • US14104230
    • 2013-12-12
    • Geoff W. TaylorYan Zhang
    • Geoff W. TaylorYan Zhang
    • G02B6/30G02F1/017G02B6/14G02B6/122G02B6/12
    • G02B6/305G02B6/1228G02B6/14G02B6/421G02B6/423G02B6/4249G02B6/4257
    • An assembly includes optical fibers each having a waveguide core, a photonic integrated circuit (IC) that includes in-plane waveguides corresponding to the optical fibers, and a substrate bonded to the photonic IC with grooves that support the optical fibers. The substrate and photonic IC can have metal bumps that cooperate to provide mechanical bonding and electrical connections between the substrate and photonic IC. Portions of the optical fibers supported by the substrate grooves can define flat surfaces spaced from the optical fiber cores. The photonic IC can include passive waveguide structures with a first coupling section that interfaces to the flat surface of a corresponding optical fiber (for evanescent coupling of optical signals) and a second coupling section that interfaces to a corresponding in-plane waveguide (for adiabatic spot-size conversion of optical signals).
    • 一种组件包括各自具有波导芯的光纤,包括对应于光纤的面内波导的光子集成电路(IC)以及与支撑光纤的凹槽连接到光子IC的基板。 衬底和光子IC可以具有金属凸块,其配合以在衬底和光子IC之间提供机械结合和电连接。 由基板槽支撑的光纤的一部分可以限定与光纤芯间隔开的平坦表面。 光子IC可以包括无源波导结构,其具有与对应光纤的平坦表面(用于光信号的渐逝耦合)相接合的第一耦合部分和与对应的平面波导(用于绝热光点)相连接的第二耦合部分 光信号的尺寸转换)。