Dingguo
Dingguo Huang, Shanghai CN
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20120101563 | DELIVERY SYSTEM FOR BRANCHED STENT GRAFT - A delivery system for a branched stent graft comprises a double-layer sheath ( | 04-26-2012 |
Dingguo Peng, Guangdong CN
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20150289722 | STIRRING BLADE - A stirring blade is provided which comprises an upper blade assembly and a lower blade assembly. The upper blade assembly comprises a first four-edged blade and an upper blade carrier to which the first four-edged blade is fixed, and the lower blade assembly comprises a second four-edged blade and an lower blade carrier to which the second four-edged blade is fixed. The upper blade carrier is connected to the lower blade carrier by a detachable connecting structure. | 10-15-2015 |
Dingguo Wang, Beijing CN
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20130304270 | NETWORKED DIFFERENTIAL PROTECTION METHOD FOR A DISTRIBUTION NETWORK BASED ON OVERHAULING OF TERMINAL EQUIPMENT - The present invention relates to a networked differential protection method for a distribution network based on overhauling of terminal equipment. The present invention comprises the steps of detecting in real time an operation state of a terminal equipment, and reconstructing a differential logic when there is a terminal equipment under an overhaul state so as to bring it into a state in which an overhaul mode and an operation mode are in parallel; for the operation mode in the state in which an overhaul mode and an operation mode are in parallel, only calculating data of all nodes in normal operation in an electrical element by a differential protection for the electrical element, while excluding data under the overhaul state in the electrical element from taking part in calculation. With the method of the present invention, the operation switch may be reliably switched off and failures may be isolated when they appear during an experiment of a scheduled test. The experiment of the scheduled test may be completed, and the correctness of the electrical topological configuration and the terminal equipment network configuration of the networked differential protection device may be automatically verified. | 11-14-2013 |
Dingguo Wang, Xuchang CN
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20130258536 | BUSBAR DIFFERENTIAL PROTECTION METHOD - The present invention relates to a busbar differential protection method. For each bay, firstly, zero-crossing point of voltage is determined according to sample values of voltage, then the current values are re-sampled on a current fitting curve by using zero-crossing point of voltage as a synchronous signal according to a given sampling time period to get a sample sequence. The sample sequence is comprised of current values of sampling points and sample serial numbers. The sample serial numbers of sampling points at the same time are same for the sample sequence of respective interval. Finally, computing is done to sample sequences of respective intervals, and differential protection is achieved. | 10-03-2013 |
20130261829 | METHOD FOR GENERATING CURRENT DIFFERENTIAL PROTECTION SUPERNODE BASED ON ELECTRICAL TOPOLOGY OF REGIONAL DISTRIBUTION NETWORK - The present invention relates to a method for generating a current differential protection supernode based on an electrical topology of a regional distribution network, which belongs to the fields of automation of electrical power systems and relay protection. The present invention generates several supernode differential protection elements, i.e., differential protection objects, and backup differential protection elements by circularly using a depth-first search method according to the inputted branch-node associative data table reflecting the electrical topology of the distribution network. the present invention can accurately located and quickly isolate the faults in the distribution network system, reduce the probability of power cut in the non-fault lines, reduce the coverage of power cut, quickly reconstruct and self-heal the distribution network, and solve the effect of the distributed access system on the distribution network protection. | 10-03-2013 |
20130262922 | CENTRALIZED AND NETWORKED PROTECTION SYSTEM AND METHOD OF A REGIONAL DISTRIBUTION NETWORK - The present invention relates to a centralized and networked protection system and method of regional distribution network, and belongs to the field of electrical system automation and relay protection. The protection system includes at least two centralized protection devices, an intelligent terminal and a communication network module, the centralized protection devices being communication with the intelligent terminal via the communication network module, the intelligent terminal being configured along with switching devices to distribute in each line section, for sampling data, backup protection and executing of tripping and closing commands, the centralized protection devices configured in the monitoring center of the regional distribution network, for generating differential protection elements based on the information sampled by the intelligent terminal and the topologic structure of the regional distribution network; and for determining the region where fault occurs and sending tripping and closing control commands. | 10-03-2013 |
Dingguo Xiao, Beijing CN
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20150177194 | Dual Robot Detection Apparatus For Non-Damage Detection - Disclosed is a twin-robot testing apparatus for non-destructive testing. The apparatus comprises two robots (1) for detecting a workpiece (3) from front and back sides thereof; a water circulating unit, comprising a pressure pump, two water ejection coupling probes (2) and water pipes, for providing a coupled water column; an ultrasonic transmitting/receiving device, comprising two ultrasonic transducers, a pulse transmitting/receiving card, and a high-speed data acquisition card, wherein the two ultrasonic transducers are respectively attached at the end-effector of the two robots (1), for transmitting ultrasound and receiving ultrasound respectively, the ultrasonic pulse transmitting/receiving card and the high-speed data acquisition card are mounted on the robot controller mechanism for transmitting and receiving, and acquiring pulse signals, the two robots perform a synchronous transmission testing, with ultrasound transmitted by one robot being received by the other robot, and the ultrasonic transducers are adjusted in position and gesture with the change in the surface shape of the workpiece (3) such that the incidence direction of ultrasonic beam is always in coincidence with the normal direction of the curved surface. The apparatus is used for automatic non-destructive testing of a curved-surface workpiece made of a composite material, and can improve the accuracy, sensitivity and efficiency of the testing. | 06-25-2015 |