A Research Of Bearing Capacity Based On Displacement Of Video

Oil derrick at the site served for Many years later, due to the sun and rain, frequent transportation and so on, can produce all kinds of defects, including derrick overall bending, settlement, local bending and corrosion, eccentric load, Making it difficult to meet the design requirements of the factory load. In order to safety production and science, accurate assessment of in service on the load capacity of the derrick, standard in the field to exert a certain load, using the strain measurement technology derrick stress. With the site measured data as the basis for the relevant calculation and calculation, finally obtains the load capacity of the derrick in service. This method is to solve the field test of derricks in use force and finally calculates the bearing capacity of the problem, but there are some problems such as:for the sake of safety, testing personnel generally do not measure the climb difficult and dangerous site. measuring point arrangement in a few limited parts only, for a use for many years and defective (especially the serious defect of the derrick), this test the obtained data may not be the most dangerous of derrick, the maximum stress location; another point is the site of a large load exerted due to difficulties, unable to obtain large loads test data. To assess the calculation error, influence safety productionUsing video measurement means for measuring the displacement of derrick, correction of the measurement data, establish the corresponding relationship between displacement and bearing.Through the analysis of the relationship between displacement and load bearing capacity, find out the connection between the displacement and load bearing capacity, can provide new methods to derrick stress testing, which can effectively reduce the labor intensity, save cost, improve worker safety. Video displacement measurement can be extracted from the derrick at any point of the deformation data, can provide a full range of derrick detection; video displacement measuring system in1m field range displacement precision can reach10μm, strain precision as high as2020με epsilon, and can reach up to25000frame/sec high speed measurement.Machine vision detection system using CCD camera which will change the detected object into image signal, sent to a dedicated image processing system, according to the distribution of pixels and brightness, color and other information, into a digital signal, the image processing system for these signals to various operations to extract target feature, such as area, quantity, location, length, then according to the preset allowable degree and other conditions the output results, including the size, number, angle, to realize the automatic recognition function,machine vision systems are characterized by increasing production of flexible and the degree of automation. In some not suitable for manual work in the dangerous work environment or artificial vision to meet the requirements of the occasion, used machine vision to replace artificial vision; at the same time large quantities of industrial production process, artificial visual inspection of product quality and accuracy of the low efficiency is not high, with Machine vision detection Method can greatly improve production efficiency and production automation degree. And Machine vision is easy to realize the information integration, is the base of computer integrated Manufacturing technology.It is due to the machine vision system can quickly obtain large quantities of information, and easy to automatic handle, with easy control of design information and processing information integration, therefore, in a modern automated production process, people will machine vision systems widely used in condition monitoring, product testing and quality control etc..