Research On Weighting & Measurement-Precision Of Weighing System In The Copper Automatic Packing Line

With the rapid development of modern industries, weighing measures has been integrated into all kinds of fields. And weighing technology also has been changed from the original single weighting to the diversified development. However, in certain industries, especially in the metallurgical industry, weighing technology is still facing a severe test, which need to face the bad weighing environment, to achieve the desired effect. This paper mainly studies copper packaging production lines with heavy automatic weighing system and measurement accuracy of the weighing process through analysing key technical, selecting a reasonable weight measurement system, and analysing of the system error accuracy, modeling through reasonable using MATLAB and DSP hardware and software integration, and ultimately establishing accurate and efficient weighing system.In order to achieve the aim, the author researches mainly from the following aspects :(1) the selection of Weighing modules: Through analysing and comparing the weighing sensors, we finally select the chip resistor sensor as the heart of the electronic weighing scales.On the basis of the determination of the weighting sensors, and in accordance with the principles of choosing electronic scales, finally selects SCS electronic weighing scales as a carrier.(2) Analysis of Weighing Error: As the poor environment of weighing, the more error sources exist, the paper analyse the error from two sides—the static and dynamic. Accoding to the established model , using hammer-attacking, ARMA model for analysis, and ultimately obtained weighing error.(3) Using MATLAB to establish a digital filter to eliminate error: Through comparing the window function method with the frequency of the sampling method, at last ,selected window function method used to design FIR digital filter. finally use DSP integrated development environment to achieve CCS FIR digital filter with window function from procedures used in MATLAB under the FDATool FIR filter design analysis.(4) Hardware support: Adopted Ti company's TMS320C5416 as a data processor, and introduced its hardware design of the power supply design process and external terminal signal input, DSP Crystal Oscillator and Reset, A /D and DSP chip connections, D / A and DSP chip connections and watchdog clock system. Through the study of the above, select suitable weighing system, in accordance with the filter design, abatement weighing error, achieve the desired effect.