Power line and bridge swing measuring method

A technology of power lines and swings, applied to measuring devices, instruments, and using wave/particle radiation, etc., can solve problems such as image storage, transmission difficulties, and unusability

Inactive Publication Date: 2010-09-22
杨士中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, bridge swing measurement is still based on optical vision measurement, which also has the above-mentioned shortcomings of optical measurement: it cannot be used in poor visibility (such as dark days and fog, rain, snow, etc.), and there are also difficulties in storing and transmitting a large number of images.

Method used

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  • Power line and bridge swing measuring method
  • Power line and bridge swing measuring method
  • Power line and bridge swing measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Measurement of stroke difference change from left to right

[0037] Figure 3 is a diagram of the left and right swing measurement system. Place 6 frequency at 1 measured point D as f 1 The sine wave source, through 8 left transmitting antenna A TL and 9 right transmitting antenna A TR Simultaneously to 10 left reflector R L and 11 right reflector R R emit electromagnetic waves. Adjust the angle of the reflector to reflect the incident wave to 12 left receiving antenna A RL and 13 right receiving antenna A RR . Use 22 circuit modules to A RL and A RR The received signal is compared, and the phase difference θ between the two is measured. The phase difference θ is caused by the wave propagation path difference L.

[0038] L = ( A TL R L A RL ) ‾ ...

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Abstract

The invention discloses a power line and bridge swing amount measuring technology. An electric wave is emitted at a measured point. The electric wave reaches the measured point by two paths, and the variation and the oscillating quantity of a path difference of the two paths are in direct proportion. Phase differences of electric waves transmitted to the measured point by the two paths are compared, and the variation of the path difference of the two paths is calculated, and thus the oscillating quantity of the measured point is obtained. In an attached figure, a sine wave source 6 with the frequency of f1 is placed at the measured point 1, and electromagnetic waves are simultaneously emitted to a left reflecting plate 10 and a right reflecting plate 11 by a left emitting antenna 8 and a right emitting antenna 9. Angles of the reflecting plates are adjusted, and incident waves are reflected to a left receiving antenna 12 and a right receiving antenna 13. After passing through a left low-noise amplifier 15 and a right low-noise amplifier 16, a receiving signal is subjected to frequency mixture to form low frequency by a left frequency mixer 17, a right frequency mixer 18 and a same local oscillation source 14, and the phase difference of two paths of electric waves is measured by a low-frequency phase wave detector 21.

Description

[0001] Technical FieldMeasuring Technology Background technique [0002] During the operation of overhead transmission lines, especially in the weather of ice, snow and strong winds, line swings (also known as galloping in the power industry) will occur. This can severely damage the lines and cause widespread blackouts. Many experts study the real-time monitoring of transmission line swing to prevent and reduce transmission line disasters. Existing monitoring technology: [0003] Based on visual measurement technology or image technology, it is feasible when the visibility is good, otherwise (such as dark sky and fog, rain, snow and other weather) it cannot be used. In addition, this monitoring technology that requires a large amount of image storage and transmission is not suitable for long-term real-time observation. [0004] The acceleration information in the three directions of the acceleration sensor is used to calculate and analyze the swing of the transmission line....

Claims

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Application Information

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IPC IPC(8): G01B15/00G01B15/06
Inventor杨士中杨力生曹海林吴皓威王韬张承畅廖勇邓晓琴
Owner杨士中