Method of determining leakage of pipes using moving standard deviation

A method of determining leakage of pipes using moving standard deviation, the method comprising:

• a pressure measurement step of periodically measuring pressure at preset time interval A using a pressure gauge mounted on a pipe;
• a calculation step of periodically calculating a moving standard deviation using pressure measured in the pressure measurement step at every preset time interval B;
• and
• a determination step of determining a state as normal when a moving standard deviation calculated in the calculation step is within a preset error range of a reference standard deviation, or determining that there is leakage in a pipe when the moving standard deviation exceeds the error range of the reference standard deviation,
• wherein a value of the time interval B is greater than a value of the time interval A,
• multiple moving standard deviations are calculated in the calculation step,
• in the determination step, if there exists at least one zero among the multiple moving standard deviations calculated in the calculation step during a preset time interval C, it is determined that there is no leakage in a pipe during the time interval C even if a moving standard deviation calculated in the calculation step during the time interval C exceeds the error range of the reference standard deviation, and
• a value of the time interval C is greater than a value of the time interval B.