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565results about How to "Reliable determination" patented technology

On-line monitoring methods for high-voltage circuit-breaker switching on-off time

The present invention relates to a method of monitoring the gate opening and closing time on line by a high-voltage circuit breaker. The inception time for the breaker gate opening and closing coil with electricity can be obtained through the voltage telecommand sampling of the breaker gate opening and closing coil, the time for the separation and connection of breaker head can be obtained through three-phase voltage telecommand sampling of capacitance sensor of high-voltage electricity-carrying display device that is arranged on the electric power transmission lines. The time gap between the inception time of breaker gat closing coil with electricity and the finish time of separation of breaker head is calculated, then the gate opening time is worked out; the time gap between the inception time of breaker gate closing coil with electricity and the finish time of jointing of breaker head is calculated, then the gate closing time is worked out. The method of the present invention bases on the telecommand sampling of voltage signal; brings the operating facilities of electric power system into full play; and overcomes the shortcomings of previous online monitoring methods; thereby making the verification of time point more conveniently and accurately, and reducing the cost, thus being favorable for the realization of state repairing of the breaker.
Owner:NARI TECH CO LTD +1

Method for automatically determining rescue path of expressway network

The invention discloses a method for automatically determining a rescue path of an expressway network. The method comprises the following steps of: 1, after a traffic accident, acquiring information of an accident site, information of peripheral emergency rescue points and information of a road network; 2, searching a path which has the shortest distance from a peripheral rescue point to an accident point and serves as an initial backup rescue path from the expressway network according to the position of the accident point and the position of the peripheral rescue point; and 3, determining a traffic stream direction influenced by the traffic accident according to lane occupied positions and traffic stream directions of the occupied lanes on the accident site, and acquiring a road condition of the accident site, the number of jammed lanes of the accident site and the position of the accident point. By the method, a rescue path decision scheme in the expressway network of emergency resources can be generated automatically, so that the emergency resources can be transported to the accident site immediately, the emergency rescue efficiency can be improved, and casualties and property loss can be reduced.
Owner:SOUTHEAST UNIV

Circuit arrangement

A circuit arrangement (1), a detection circuit (50, 70) and an LED driver circuit (100, 110) is disclosed for operating at least one lighting unit, such as an LED unit, with a phase-cut operating voltage. The circuit arrangement (1) comprising at least an input (6) for receiving a phase-cut operating voltage from said power supply and/or an output (7) for connection to said at least one lighting unit and a pulse injection circuit, configured to determine a phase-cut operation of said power supply and to draw a current pulse from said power supply within a delay time between 200-700 μs after said phase-cut operation to provide a stable operation of said LED unit with the phase-cut power supply. The detection circuit (50,70) comprises at least an input (6) for receiving a phase-cut operating voltage from said power supply and a lamp compatibility detector (52, 72), configured to determine the presence of a parallel lamp (57), connected in parallel with the detection circuit (50, 70) to said phase-cut power supply during operation and to provide a compatibility signal to a LED driver circuit (100, 110) corresponding to the determination of said parallel lamp (57), so that said driver circuit (100, 110) is set between a normal operating mode and a compatibility mode in dependence of the presence of said parallel lamp (57).
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
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