Method for real-time monitoring on non-uniform settlement of crane rail of bridge type crane
An overhead crane, real-time monitoring technology, applied in measurement devices, surveying and navigation, height/level measurement, etc., can solve the problems of high inspection work intensity, shortened service life, poor safety, etc., and achieve perfect efficiency and automation. Improve efficiency and automation to ensure normal usage
Inactive Publication Date: 2013-05-22
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology
This traditional detection method has the shortcomings of relying too much on manpower and poor real-time performance, and the on-site measurement work will be affected by the working conditions of the wharf, the detection work is intensive and the safety is poor
This also leads to the long period of the existing regular measurement, which makes it possible for the bridge crane to work for a long time on the cart track whose height difference exceeds the allowable limit value, thus affecting the health of the crane and shortening it in the long run service life and even safety issues
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[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific drawings.
[0018] When the front girder of the bridge crane is lowered, the height difference of the cart track will cause the pitch angle of the girder to change. In order to make the angle sensor installed at the front end of the girder truly reflect the pitch angle of the girder, it is necessary to reduce the noise of the complex signal output by the sensor. Signal processing such as wavelet packet decomposition.
[0019] Such as figure 1 As shown, the front girder of the bridge crane has two states: stowed and put down. Considering the height difference of the cart track, we only extract figure 2 The angle signal when the girder is put down is analyzed in the next step; the real-time angle vibration signal when the girder is put down is denoised by the wa...
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The invention discloses a method for the real-time monitoring on the non-uniform settlement of a crane rail of a bridge type crane, which comprises the following steps: 1) acquiring a real-time angle vibration signal in an online manner when a girder is laid down, performing noise reduction and ultra-low-frequency time-frequency characteristic analysis, then performing wavelet packet decomposition signal processing, and acquiring an angle vibration characteristic signal which is almost caused by the height difference of the crane rail; and 2) calculating the height difference of the crane rail based on a formula dealt A=alpha (C-C0) according to the actually measured angle value of the girder obtained in the step 1). By adopting the technical scheme, the invention realizes the automated monitoring on the non-uniform settlement state of the crane rail and improves the safety; and the method simultaneously has the advantages of real-time monitoring and predictability.
Description
technical field [0001] The invention relates to a new technology for real-time measurement of the height difference of a bridge crane trolley track, specifically a real-time monitoring method for uneven settlement of a bridge crane trolley track. Background technique [0002] The design life of general port terminals and their lifting equipment will reach several decades. In such a long period of time, due to changes in geological structure, wharf structure, load characteristics, and regional ground subsidence, it is easy to cause uneven settlement of the wharf and the bridge crane track laid on the wharf. The uneven settlement of the wharf will affect the safe operation of the wharf and the bridge cranes working on it. When the state of the wharf is normal, the height difference of the (sea and land side) cart track laid on the wharf should be kept within a certain range. When it exceeds the allowable limit value, it will affect the normal operation and even the safety of ...
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IPC IPC(8): G01C5/00
Inventor 胡雄王微孙德建岳明彦
Owner SHANGHAI MARITIME UNIVERSITY