Laser displacement sensor-based dual-measuring automatic alignment system

Abstract

The invention discloses a laser displacement sensor-based dual-measuring automatic alignment system. The laser displacement sensor-based dual-measuring automatic alignment system is composed of a mechanical system and a measurement and control system; the mechanical system comprises a side baffle, a workpiece table, a mounting plate, an upper automatic sliding table, an upper sensor fixture, an upper sensor, a lower sensor fixture, a lower sensor, a lower automatic sliding table, a motor and a bracket; the measurement and control system controls the automatic sliding tables to drive the sensors to move relatively in an XOY plane; the measured value of finite points are collected to fit a curve; a peak point is found in the fitted curve; and an industrial personal computer controls the motor to move the sensors to the peak point, so that the upper sensor and the lower sensor can be aligned with each other. With the automatic alignment system provided by the invention adopted, the problem of poor alignment accuracy of a general alignment process can be solved, and after performing alignment, the automatic alignment system can be disassembled and installed again, and therefore, the problem that the problem of one-time alignment can be solved.

Description

technical field [0001] The invention relates to an automatic alignment system of double probes based on a laser displacement sensor. Background technique [0002] There are many kinds of sensors, which are widely used in various fields of social production and scientific research. Laser displacement sensors have developed rapidly in recent years, greatly improving the efficiency and accuracy of measurement in the fields of dimension measurement of parts, three-dimensional contour measurement, and product quality inspection. In some measurement occasions, it will be applied to the alignment of double probes to measure the thickness or diameter of the measured piece. [0003] Usually in the measurement application of double probes, it is very difficult to align the probes on the same straight line, especially for sensors with extremely high precision such as laser displacement sensors, which require higher alignment accuracy, so as to ensure Accuracy when measuring. [0004...

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Problems solved by technology

The interpolation method is also a method to deal with this kind of problem. However, the interpolation method has obvious disadvantages. First, because the data inevitably has errors, the approximate function P(x) is required to pass through all known points at this time, which is equivalent to retaining all error

In addition, due to the large amount of experimental data, if polynomial interpolation is still used, a polynomial with a higher degree will inevitably be obtained. In this way, not only the calculation is complicated, but also the convergence and stability of p(x) are difficult to be guaranteed, and the Runge phenomenon will appear , the approximation is not good

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