A digital SPC high-precision displacement sensor multiplexer and its online calibration and data transmission method

Abstract

The invention provides a digitalization SPC high precision displacement sensing multichannel device. The multichannel device comprises a main controller, an SPC displacement sensor port connected with a communication protocol recognition matching module, a calibration data storage port connected with a measurement data correction module, and a USB port connected with a data conversion transmission module. The SPC displacement sensor port is connected with the output port of an SPC displacement sensor. The calibration data storage port is connected with an EEPROM memory. The multichannel device also comprises a first calibration button for correcting data points in an online manner and a second calibration button matched with the first calibration button to enter or exit an online correction mode. The invention also provides a data online correction and transmission method adopting the digitalization SPC high precision displacement sensing multichannel device. According to the invention, efficiency and precision of acquisition of transmission data in an SPC control process are improved; usage cost is reduced; data online correction is achieved; data collection efficiency is further improved; and data reliability is ensured.

Description

technical field [0001] The invention relates to the technical field of digital SPC, in particular to a digital SPC high-precision displacement sensing multiplexer and its online correction and data transmission method, which are used for the statistical process control of the geometric processing dimension quality of mechanically processed products, especially precision bearings. Background technique [0002] Statistical Process Control (SPC for short) is a process control tool with the help of mathematical statistics. It analyzes and evaluates the production process, discovers the symptoms of systemic factors in time according to the feedback information, and takes measures to eliminate their influence, so that the process can be maintained in a controlled state only affected by random factors, so as to achieve the purpose of quality control. [0003] When the process is only affected by random factors, the process is in a state of statistical control; when there are system...

AI Technical Summary

Problems solved by technology

There are still many defects in the existing data means, mainly in the fact that the displacement sensor multiplexers used in the existing SPC process only have a single brand interface and lack interchangeability, which will bring a series of efficiency and accuracy and cost issues, and at the same time, the data correction in the existing technology relies on the host computer to realize, or there is no data correction function at all, and the data collection efficiency and reliability cannot be guaranteed

Images