Research On Clinometer Of Crystallizer

With the progress of metallurgy industrial technique, crystallometry isvery important to improve the quality and yield of casting.This thesis develops a sort of new type of capacitance angle sensor whichmainly bases on the need of industry, and cooperates with a suit of single-chipmeasuring circuit to form a kind of auto measuring system. It mostly applies tostatic measure of crystallizer's taper, also, it can attain to the prospectiverequest of high precision and high resolution.This thesis firstly illustrates the basic theory of capacitance sensor, sets upthe math model of capacitance sensor and three kinds of work forms, studies ofthe math model of capacitance sensor's four kinds of signal switching circuits.Also, it introduces the method of how to remove and decrease the influence ofedge effect and leak capacitance according to the interference of capacitancesensor.Then, the thesis mainly researches on the capacitance angle sensor toangle measurement that combining with the elementary theory of capacitancesensor. First, it designs the sensor's structure, then, studies of the signalswitching circuit of the capacitance angle sensor and establishes its math model.It adopts method of driving cable as effective measure to eliminate the parasiticcapacitance's interference, also, analyses the internal and external noisesignal's interfering source in capacitance angle sensor in theory, finally, givesthe solution.At last, aiming at the need of industry, the thesis which uses capacitanceangle sensor by way of signal detection designs the system circuit of the taperclinometer of crystallizer containing hardware's design and anti-jamming stepand software flow chart, also, gives the instrument's real device photo.Through the experiment datum's analysis, the instrument can be able to achievethe prospective request of high precision and high resolution.