Ultrasonic detecting method for electric power pylon steel angle
A technology of ultrasonic guided wave and power tower, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., which can solve the problems of power tower collapse accidents, economic losses, corrosion, etc. Simple operation effect
A technology of ultrasonic guided wave and power tower, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., which can solve the problems of power tower collapse accidents, economic losses, corrosion, etc. Simple operation effect
CN101509899AActive Publication Date: 2009-08-19STATE GRID TIANJIN ELECTRIC POWER +1
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Embodiment Construction
[0028] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] An ultrasonic guided wave detection method for the angle steel of a power tower mainly uses an ultrasonic flaw detector and an ultrasonic probe to detect the angle steel. The specific steps are as follows:
[0030] 1. Select an ultrasonic flaw detector: the excitation signal generated by it is a single-tone signal, preferably a wide-pulse narrow-band excitation signal, with a sensitivity margin ≥ 110dB, a sampling frequency ≥ 60MHz, a recordable waveform ≥ 100, and a display refresh frequency ≥ 60Hz , the sound velocity range is 1000-7000m / s; the ultrasonic flaw detector usually has a recordable function and a communication interface to exchange data and waveforms with the computer, and can also be connected to a printer to directly output the test results.
[0031] 2. Select the ultrasonic guided wave probe: the detection frequency is 0...
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Abstract
The invention provides an ultrasonic guided wave testing method aiming at the angle steel of an electric steel tower, which belongs to the field of ultrasonic guided wave testing. The testing method is mainly and technically characterized by comprising the steps of: selecting an ultrasonic flaw detector, an ultrasonic guided wave probe and a reference block, and manufacturing an artificial defective groove on the reference block; manufacturing a distance-amplitude curve by the reference block; polishing a smooth probe movement area on the surface of the angle steel to be tested and coating a coupling agent; using the ultrasonic guided wave probe to transversely move along the probe movement area for scanning; and judging whether the angle steel to be tested is qualified or not according to the relationship between the echo signal amplitude and the distance-amplitude curve. The testing method uses the ultrasonic detector by matching with the special ultrasonic guided wave probe for exciting the ultrasonic guided wave with designated mode, is used for the nondestructive testing of the angle steel of the electric steel tower, is characterized by simpleness, fastness, safety and reliability, and has great significance in ensuring the safe and stable operation of the electric steel tower and power transmission lines.
Description
technical field [0001] The invention belongs to the field of ultrasonic guided wave detection, in particular to an ultrasonic guided wave detection method for electric power tower angle steel. Background technique [0002] Power tower is an important equipment in power transmission engineering. The power tower fixed on the ground is mainly composed of angle steel connections and has certain windproof, rainproof, anti-icing and anti-corrosion capabilities to ensure the normal operation of power transmission. During the actual operation of the power tower, the angle steel will be cracked or corroded to varying degrees after being exposed to certain wind, sun and various harmful substances in the air. In severe cases, the power tower will collapse. cause huge economic losses. In order to eliminate this potential safety hazard, the angle steel of the power tower should be detected in time to find problems and take effective remedial measures to prevent the occurrence of power ...
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Patent Timeline
19 Aug 2009
Publication
CN101509899A
- IPC
- G01N29/11
- Inventors
- 马崇; 杜筝