Multi-scale automatic detection system and method for profile errors of T-shaped guide rail

Abstract

The invention discloses multi-scale automatic detection system and method for profile errors of a T-shaped guide rail. A high-precision linear guide rail is arranged on a detection platform, wherein two laser sensors respectively in a horizontal direction and a vertical direction are put at one end of a measurement rack on the guide rail, while the other end of the measurement rack is connected with a synchronous belt driven by a stepper motor so as to ensure that the measurement rack moves along the guide rail; two proximity switches and two limit switches arranged at both ends of the guide rail are used for controlling start and stop positions of the measurement rack and protecting the measurement rack; a side face of the detection platform is provided with a pair of supporting shafts and three positioning blocks, which are used for supporting and positioning a workpiece; the stepper motor is controlled to drive the measurement rack to move through a programmable logic unit; meanwhile, displacement values of the position of the measurement rack and the two laser sensors and the states of the two proximity switches and the two limit switches are acquired, and the communication with an upper computer is realized; and noise removal and filtration are carried out on measured data by the upper computer so as to obtain multi-scale indexes of profile errors of the measured workpiece. The invention can accomplish the measurements of the side face and the top face of the T-shaped guide rail.

Description

technical field [0001] The invention relates to an automatic detection system and method, in particular to a multi-scale automatic detection system and method for a T-shaped guide rail contour error Background technique [0002] With the development of the elevator market, high-speed and high-quality elevators have become a hot spot for the development of the elevator guide rail industry in the future, and the market demand for high-precision elevator guide rails is also increasing, which brings a lot of business opportunities and opportunities for elevator guide rail manufacturers. challenge. Van elevators generally use T-shaped elevator guide rails. One of the important factors determining its quality is the profile error of the side and top surfaces of the T-shaped guide rail. Among the profile errors, straightness and surface waviness have the greatest impact on its quality. Because the guide rail of the T-type elevator is long, generally between 4 and 5 meters, if the ...

AI Technical Summary

Problems solved by technology

However, at present, domestic enterprises only measure the feature points of the straightness of the side and top surface of the T-shaped guide rail, and most of the measurements use manual measurement methods, which not only have low accuracy, but also are greatly affected by human factors and low efficiency, making it difficult to adapt to detection. Demand for high-precision elevator guide rails

There are also companies that directly introduce complete sets of measuring equipment from abroad. Although the accuracy and efficiency of the measurement have been greatly improved, the price is expensive, and only the straightness is measured.

Some domestic scientific research institutions or enterprises have also independently developed some testing equipment, but they are only aimed at the straightness index, and some of them have only improved the measuring mechanism, and the automation level is not high; although some have improved the degree of automation, However, the contact measurement method is still used, which will cause a lot of wear to the measurement tool, and long-term use will affect the accuracy and service life of the measurement.

At the same time, the instrument that can measure the straightness (shape error), waviness and other multi-scale indicators of the profile error of the T-shaped guide rail is still blank.

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