A deformation monitoring system for external floating roof storage tanks

Abstract

The invention relates to a deformation monitoring system for an external floating cover storage tank. The system includes a data processing device, a positioning device, a total station at a control point in the top part of the inner tank wall of the external floating cover storage tank, at least one scanning target set arranged on the upper part of the floating cover of the external floating cover storage tank and a three-dimensional laser scanner arranged in at least one measurement point of the upper part of the floating cover. The positioning device is used for measuring the geodetic coordinates of a reference point. The three-dimensional laser scanner is used for scanning the scanning target set and the inner wall of the external floating cover storage tank. The data processing device acquires measurement data of the positioning device, the total station and the three-dimensional laser scanner and obtains the deformation condition of the external floating cover storage tank after data treatment. According to the invention, by setting the reference point in a position away from the external floating cover storage tank, coordinates of the vertical storage tank obtained through three-dimensional scanning are converted to absolute coordinates in a reference point coordinate system, so that accurate monitoring on integral geometric deformation safety condition of the external floating cover storage tank can be realized.

Description

technical field [0001] The invention relates to the technical field of storage tank safety management and measurement, in particular to a deformation monitoring system for a large external floating roof storage tank. Background technique [0002] Large storage tanks are one of the commonly used equipment in petrochemical and pipeline enterprises, and belong to the category of atmospheric pressure vessels and thin-walled structures. The outer floating roof storage tank is a common form of large storage tanks. It is characterized by low evaporation loss of stored oil, and the self-weight of the tank roof is supported by the storage liquid, making it evenly stressed. Therefore, large storage tanks often use this type of storage tank. form. However, compared with other forms of storage tanks, the disadvantage of floating roof storage tanks is also obvious, that is, it is prone to geometric deformation, which will affect safe production in severe cases. [0003] If the wall pan...

AI Technical Summary

Problems solved by technology

The optical reference method requires the use of optical plummets, horizontal rulers, mobile magnetic rulers, etc., but this method based on single-point measurement will cause large measurement errors when the deformation of the tank wall is complex

The photoelectric method generally uses total stations and GPS to measure the deformation of storage tanks. This method is still a single-point measurement, that is, only point observations can be used to obtain deformation data of fewer observation points to infer the overall deformation, and it is impossible to obtain local and The overall accurate deformation details, and the installation of the equipment on site is difficult, and the measurement time is relatively long, so the requirements for the stability of the environment are very high, and its measurement accuracy and stability are often greatly affected, so the detection efficiency and accuracy cannot be effectively obtained. Guarantee, unable to meet actual production needs

In addition, the existing technology needs to measure many geometric parameters, the operation is complicated, the labor intensity of personnel is high, and the measurement process is greatly affected by human factors, and the error is large when measuring a tank with large deformation; during the measurement process, the tank contains oxygen. Insufficient, toxic, harmful, and corrosive media will cause certain harm to personal safety

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