| Production enterprises of ceramic continuously provide people with various high quality products at the same time also unceasingly make a lot of ceramic dust, The dust health standard of national regulations is10mg/m3, but most ceramic production enterprises plant environment dust concentration exceed the level.The dust of ceramics are very dangerous, the over standard environment for long hours may induce pneumoconiosis disease, this paper puts forward the research of ceramic dust concentration test in ceramics factory. The following contents are mainly studied in this dissertation:1. The characteristics research of ceramic dust particle. First, look up dust concentration measurement methods at home and abroad, compared with their advantages and disadvantages, and find out the optimal method of ceramic dust concentration measurement; Secondly, research some characteristics of the ceramic dust particle, including particle granularity, dispersion, silicon content, mathematics distribution of dust particle, through the study, lay a foundation for the study of the theory of the ceramic dust concentration.2. Theoretical basis of Ceramic dust concentration measurement. Introduces the strong scattering light basic theory, including the related scattering and the related scattering, extinction coefficient and scattering coefficient calculation formula, and so on; The Mie scattering theory of classic to the spherical scattering body the scattering intensity by the dust of ceramics is deduced to the scattering intensity and ceramic dust concentration of certain linear relationship, so the method to the scattering method to measure after ceramic dust concentration, this also is the theoretical basis of the detector.3. The development of ceramic dust concentration detection instrument. Complete the hardware circuit of the detector and software of the design. This paper STC89C52RC choose as the core microprocessor, to design the periphery of the single chip microcomputer circuit, including the photoelectric detection circuit, amplifying circuit, wireless transmitting circuit, serial communication interface circuit; Software of software development environment Keil in complete control of the design and calculation program written work; The visual programming tool for LabVIEW upper machine control and display interface design.4. Test and analysis. This paper the detector will on the extensive testing, the parameters of detector set, reliability. Environmental protection of the local and the data obtained were compared, the results are degrees at about2%. The experimental data show that the testing instrument to meet the design requirements, and has a high precision. |
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