Radar-imaging-based wobbling state monitoring system for overhead line system
A condition monitoring system and catenary technology, applied in radio wave measurement systems, measurement devices, electromagnetic wave re-radiation, etc., to achieve high sensitivity, strong reliability, and measurable effects
Inactive Publication Date: 2014-06-18
NORTHWESTERN POLYTECHNICAL UNIV
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[0005] In order to overcome the deficiencies of the prior art, the present invention provides a system for monitoring the swing state of the catenary based on radar imaging, which solves the problem of real-time detection of the swing state of the contact line under extreme windy conditions. It can not only monitor the swing state of the catenary in real time, but also Quantify monitoring results
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[0014] The system adopts a two-level early warning mode: the first level early warning is to start the radar when the wind speed reaches the threshold; the second level early warning is to issue an alarm when the detected swing data reaches the threshold. Its monitoring process is as image 3 As shown, when the on-site wind speed reaches a certain intensity, which can pose a threat to the safe operation of the catenary, the first-level early warning is activated, and the lidar is turned on to monitor the real-time swing of the catenary; the spatial orientation of the catenary obtained by radar detection is tracked and recorded information, monitor the changes of these data at all times, and realize the real-time monitoring of the catenary swing state. When the difference between the real-time data and the normal data under the standard condition of no wind reaches the predetermined threshold, it proves that the swing range of the catenary is too large, which threatens the safe...
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The invention provides a radar-imaging-based wobbling state monitoring system for an overhead line system. Data acquired by a wind speed sensor is processed by a central control unit, and is compared with a preset wind speed threshold value; a laser radar is started to give a response if a wind speed value exceeds the threshold value, and performs down-looking measurement on the overhead line system; measured overhead line system data obtained by scanning of each time is compared with a standard value; an early warning device is started by the central control unit to give an alarm when the wobbling amplitude of the overhead line system exceeds a preset threshold value; and a wireless communication unit packages all the wind speed data measured by the wind speed sensor and all the direction data, detected by the radar, of the overhead line system, and transmits the packaged data to a monitoring center. According to the monitoring system, the wobbling state of the overhead line system can be visually monitored in real time, and monitoring data is metrizable, more accurate and higher in sensitivity.
Description
technical field [0001] The invention relates to the monitoring field of catenary wires of electrified railways, and is specifically applied to monitoring the swing state of catenary lines of electrified railways in windy weather. Background technique [0002] The electrified railway catenary is a special transmission line that provides power support for the operation of electric locomotives. The accuracy of its layout will directly affect the quality of the locomotive's power supply, and then affect the safe operation of the locomotive. Although there are specific compensation devices at both ends of each contact line to tighten and fix it, it is still relatively vulnerable to swinging and bending deformation under the influence of strong winds, resulting in poor contact with the pantograph of the locomotive and causing pantograph-catenary accidents. [0003] Although our country has established a set of strict standards for the layout and maintenance of the catenary, in vi...
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IPC IPC(8): G01S17/88G01S17/89
Inventor 李涛喻会永李二京杨莎莎刘钊吴禹希
Owner NORTHWESTERN POLYTECHNICAL UNIV