A Measurement Method of Gamma-Ray Total Irradiation Dose Using CCD or CMOS Camera

摘要

The present invention relates to a method for measuring total gamma-ray irradiation dose online which is performed in a gamma-ray irradiation room having a shielding wall using a CCD or CMOS camera, and which comprises: a step for taking a picture of a display part of an electronic device by installing the CCD or CMOS camera in front of the electronic device after arranging the electronic device with the display part in front of a line source for irradiating gamma-rays with a constant dose rate; a step for storing observation images receiving from the camera at predetermined time intervals by a control part installed inside the shielding wall of the gamma-ray irradiation room; and a step for calculating the total gamma-ray irradiation dose of the electronic device by multiplying the dose rate and gamma-ray irradiation time after the control part measures the time in which the line source irradiates the gamma-rays. The control part calculates spots at specific time by a background subtraction processing method and displays the spots at the specific time as a graph after counting the spots displayed on the observation images. When a number of the stops at the specific time are rapidly increased in the displayed graph, the control part grasps the time as a time that the electronic device is malfunctioned to have effects not only accurately calculating the total irradiation dose online, but also easily estimating the malfunctioned time.