Dual-probe automatic alignment system based on laser displacement sensor

Abstract

The invention discloses an automatic alignment system for dual probes based on a laser displacement sensor, which is mainly composed of a mechanical system and a measurement and control system; wherein the mechanical system includes a side baffle, a workpiece table, a mounting plate, an upper automatic Sensor fixture, upper sensor, lower sensor fixture, lower sensor, lower automatic sliding table, motor, bracket; the measurement and control system controls the automatic sliding table to drive the sensor to move relative to the XOY plane. Find the peak point in the matching curve, and the industrial computer controls the motor to move the sensor to the peak point, so as to control the alignment of the upper and lower sensors. The automatic alignment proposed by the invention solves the problem of low accuracy caused by the general alignment process; the invention can also be disassembled and installed after alignment, which solves the one-time problem of alignment.

Description

technical field [0001] The invention relates to a dual probe automatic alignment system 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 field of part size measurement, three-dimensional contour measurement, and product quality inspection. In some measurement occasions, it will be applied to double probe alignment to measure the thickness or diameter of the measured object. [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 particularly high accuracy such as laser displacement sensors, which require higher alignment accuracy, so as to ensure Accuracy when measuring. [0004] For the laser displa...

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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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