Study On Roll Profile Measure-Ment System With Ultrasonic

The demand to the precision of steel plate in industry production has enhanced increasingly, but the surface precision of roller, which affects the precision of plate material seriously, will debase because it is worn. Therefore, it is necessary for guaranteeing the quality of steel plate to detect and repair the roll profile timely and exactly.This paper presents the sonic circulation and multi-pulse echo principle and designs roll profile ultrasonic measurement system based on the analysis of 3D surface measurement technology and roll profile measurement methods.The system is based on ultrasonic multiple pulse-echo principle, the control circuit of sonic circulation, can improve the precision of measurement by extending the time of detection. The paper introduces data processing methods in detail after providing the measuring circuit of roll profile. The system adopts VB to design softpanel of measurement system, realizing the serial communication between PC and singlechip base on MSComm control of VB. Data processing is performed by PC,which includes detecting rough error by quartile method base on first order differential, adopting three points algorithm to eliminate deviations of rack displacement and installation, applying minimum containing area method to evaluate the sectional plane radius of roller and realizing it by genetic algorithm, adopting Akima method to fit curve of roll profile. Otherwise, this paper introduces a compound language programming method of VB and C because the data processing arithmetic is programmed by C language. The roll profile measurement system with ultrasonic presented by this paper is intelligentized and polymorphism, and has auto-detection, real time data collection, data processing and curve fitting functions. The high-precision roll profile obtained by this system can supervise the steel plate materials machined correctly.