Experimental Analysis Of Multi-effect Factors Of Iron Grade Sensor For Iron Ore Powder

With the recent development of iron and steel corporations in the aspect of large-scale,modern and high-speeded production,their processes of the production become more and more numerous,continuous and automatic.The demand of measuring the iron grade is required to improve constantly.Now the rapid measurement research of the iron grade has been focused more and more by the related fields and the research institutes during the process of dealing with and selling the iron ore powder.Different forms of research methods continue to emerge.Chemical analysis methods are commonly used for measuring the iron grade,which leads to the high accuracy of the measurement.However,the questions such as the long period of the measurement and the rigid demand of the reagent provide the achievable environment for the research of the rapid measurement method of the iron grade based on the inductive sensor.The output voltage values of the sensor can be read directly and the values of the iron grade can be reflected indirectly by the inductive sensor in order to measure the iron grade,which gets rid of the trouble of recording chemical experiment data.The research and the application of the iron grade sensor will lead to the main development trend of the measurement aspect of the iron grade.Used ferromagnetism of the iron ore powder and based on the electromagnetic field theory,the self-inductive sensor of the iron grade is designed and meanwhile the inductive theory of the sensor is researched.Multi-effect factors of the sensor are analyzed including structural parameters of the sensor,the excitation signal and the temperature.The testing circuit of the sensor is designed based on the theory of electromagnetic induction and meanwhile the circuit simulation and the circuit debugging are completed.The influence principles of frequency and amplitude of the excitation signal on the sensor performance are analyzed quantitatively,as a result,the values of frequency and amplitude used in the experiments are determined.Through establishing the mathematical model between the values of the iron grade and the output voltage values of the sensor,the experiment analysis and the optimization analysis of structural parameters of the sensor are researched through the orthogonal experiment design,as a result,the best structural parameters of the sensor are chosen.Temperature storage experiments of the sensor are completed by means of the method of the reliability of temperature experiments.The influence principle of the temperature on the sensor performance is determined and meanwhile the method of reducing temperature influence is provided.The advantages of the iron grade sensor are the high-speeded measurement,the simple method,the low cost and the easy operations,however,several factors can have the influence on the process of acquiring the data with the sensor,which become the beginning of the research.The influence principles of multi-effect factors on the sensor performance are analyzed.The results of the thesis establish the necessary basis for researching the factors of the sensor deeply and provide the theory evidence for improving the sensor performance.