Apparatus and method for detecting blockage of impulse lines

An apparatus for detecting a blockage of an impulse line, the apparatus comprising:

• a pressure detecting unit configured to detect in time series a higher static pressure that travels through a higher pressure impulse line and generate time series data sets of the higher static pressure, the pressure detecting unit being configured to detect in time series a lower static pressure that travels through a lower pressure impulse line and generate time series data sets of the lower static pressure;
• a first fluctuation calculating unit configured to calculate time series data sets of a higher static pressure fluctuation based on the time series data sets of the higher static pressure;
• a second fluctuation calculating unit configured to calculate time series data sets of a lower static pressure fluctuation based on the time series data sets of the lower static pressure;
• a first square sum calculating unit configured to calculate the square sum of the time series data sets of the higher static pressure fluctuation;
• a second square sum calculating unit configured to calculate the square sum of the time series data sets of the lower static pressure fluctuation;
• a ratio calculating unit configured to calculate a ratio of the square sum of the time series data sets of the higher static pressure fluctuation to the square sum of the time series data sets of the lower static pressure fluctuation;
• a blockage rate calculating unit configured to calculate a blockage rate based on the ratio;
• and
• a determination unit configured to determine a blockage of each of the higher and lower pressure impulse lines with reference to the blockage rate.

A method of detecting a blockage of an impulse line, the method comprising:

• detecting in time series a higher static pressure that travels through a higher pressure impulse line to generate time series data sets of the higher static pressure;
• detecting in time series a lower static pressure that travels through a lower pressure impulse line to generate time series data sets of the lower static pressure;
• detecting in time series a differential pressure between the higher and lower pressure impulse lines to generate time series data sets of the differential pressure;
• calculating time series data sets of a differential pressure fluctuation based on the time series data sets of the differential pressure;
• calculating time series data sets of a higher static pressure fluctuation based on the time series data sets of the higher static pressure;
• calculating time series data sets of a lower static pressure fluctuation based on the time series data sets of the lower static pressure;
• calculating the square sum of the time series data sets of the differential pressure fluctuation;
• calculating the square sum of the time series data sets of the higher static pressure fluctuation;
• calculating the square sum of the time series data sets of the lower static pressure fluctuation;
• calculating a first correlation coefficient based on the time series data sets of the differential pressure fluctuation, the time series data sets of the higher static pressure fluctuation, the square sum of the time series data sets of the differential pressure fluctuation, and the square sum of the time series data sets of the higher static pressure fluctuation;
• calculating a second correlation coefficient based on the time series data sets of the differential pressure fluctuation, the time series data sets of the lower static pressure fluctuation, the square sum of the time series data sets of the differential pressure fluctuation, and the square sum of the time series data sets of the lower static pressure fluctuation;
• calculating an intermediate variable based on the first and second correlation coefficients;
• calculating a blockage rate based on the intermediate variable;
• and
• determining a blockage of each of the higher and lower pressure impulse lines with reference to the blockage rate.

A method of detecting a blockage of an impulse line, the method comprising:

• detecting in time series a higher static pressure that travels through a higher pressure impulse line to generate time series data sets of the higher static pressure,
• detecting in time series a lower static pressure that travels through a lower pressure impulse line to generate time series data sets of the lower static pressure;
• calculating time series data sets of a higher static pressure fluctuation based on the time series data sets of the higher static pressure;
• calculating time series data sets of a lower static pressure fluctuation based on the time series data sets of the lower static pressure;
• calculating the square sum of the time series data sets of the higher static pressure fluctuation;
• calculating the square sum of the time series data sets of the lower static pressure fluctuation;
• calculating a ratio of the square sum of the time series data sets of the higher static pressure fluctuation to the square sum of the time series data sets of the lower static pressure fluctuation;
• calculating a blockage rate based on the ratio;
• and
• determining a blockage of each of the higher and lower pressure impulse lines with reference to the blockage rate.