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通过对数字式电容液位计及等值基准电容补偿法的研究 ,提出将数字式电容液位计与压差法相结合 ,由数字式电容液位计测量原油液位和油水界面的高度 ,等值基准电容法补偿由于环境温度、极板腐蚀和油液粘结带来的测量误差 ,采用压差法测量混油密度 ,依据混油密度和液位高度求得油重及容积 ;通过高精度A/D板采集模拟和数字信号 ,连续对储罐内原油的液位、密度、温度等各种参数进行运算 ,并由智能监测仪实施全自动显示 ,其测量精度可达到毫米级。
Through the research on the digital capacitance level meter and the equivalent reference capacitance compensation method, it is proposed to combine the digital capacitance level gauge with the differential pressure method to measure the crude oil level and the height of the oil-water interface by the digital capacitance level gauge The value of the reference capacitance method to compensate due to the ambient temperature, plate corrosion and oil measurement error caused by the measurement, the use of pressure measurement of mixed oil density, according to the mixed oil density and liquid height obtained oil weight and volume; high precision The A / D board collects analog and digital signals, continuously calculates various parameters such as the liquid level, density and temperature of the crude oil in the storage tank, and performs automatic display by the intelligent monitor. The accuracy of the measurement can reach millimeter.