On-line Measurement Equipment Of Caster Roll Gap

This paper mainly studies the on-line measurement equipment of caster roll gap. Accurately measuring caster physical parameters of roll gap is an important examination to improve product quality. For the shortages of measurement process of the current test system for transimisson data,which collected in a low precision and can not be measured continuously and real-time, caster roll gap on-line measuring instrument embedded PC 104 main board as the core platform, designed a double channel parallel operation of the high speed data acquisition card, collect real-time sensor's detection under test output data of voltage signal, digital signal, the pulse signal,and software in the system corresponding to the data analysis, realize the caster roll gap data of on-line detection, wireless transmission and reception of data in PC monitor real-time processing and storage of the interface.This paper first describes the principle of roll gap measurement, as well as the introduced measurement methods, and developed a measuring devices overall design, the specific hardware and software is divided into two parts;then describes the measurement sensors and data acquisition system hardware structure and the chip's schematic design situation, wireless transmission and wireless remote control circuit situation;and then introduces data acquisition system software, PC data processing procedures. Finally,the system test and key points are summarized in this paper.In the measurement and control system hardware design, the data acquisition based on the PCM-3355 PC104 Embedded system, with ADS7842 converter chip, a resolution of 12bit, Altera's CPLD chip EPM7128 is selected as the core data acquisition devices and in its internal components using the schematic manner in order to achieve data transmission capability, the PC 104 address bus decoding, controled the working status of each unit for the logic control signals.Used SRWF-1028 chip as a wireless remote control. In the software design, C language is used to data collection; the text designs the serial port communication betwween roll gap equipment and PC based on RS232 and the component of VB,an then designs the program of data a processing and analyzing,curves displaying.The designed measuring system can be able to test angle precision,the rotation and the roll gap spacing,The measuring apparatus roll gap spacing error is less than 0.5%, dip angle measurement precision of 0.01 , to meet the design requirements.