A marine draft detection calibration method

The present invention discloses a draft of the ship detected calibration method comprising the steps of: installing a sensor in each of the upper and lower sides of the detection of the door; the use of sensors for water detection sensor to the surface of the reference distance H; use a sensor for underwater detection sensor a sensor to determine the distance between the bottom of the sensor to the bottom of whether the reference distance Y deviation greater;; to the bottom of the calibrated reference distance Y calculated draft depth. In the present invention, the surface of the sensor detection threshold for each take several measurements, the measured values ​​are likely to peak measured on the surface of the waves, at a peak or median, take multiple measurements, remove the maximum and minimum values, and then take average method can reduce the impact of fluctuations in the water. The present invention is calculated by the compensation data, to overcome the impact of the detection threshold and shake the water fluctuation ranging sensor measurement accuracy brought achieve self-calibration purposes.