| 摘要 |
<p>Provided is testing technology for radioactive contamination that has determination accuracy not dependent on the distance between a radiation sensor and a test object surface. A testing device for radioactive contamination comprises: a receiver (31) to receive detection signals (S (S1, S2, ... Sn)) for radiation dose rate by way of a plurality of radiation sensors (21 (211, 212, ... 21n)) disposed in a vertical direction with respect to the travel direction of a test object (11); a setting unit (33) to set a section period (T (=L/V)) on the basis of the length, in the travel direction, of a unit section that sections the surface of the test object (11) and velocity information (V) of the test object (11); a calculating unit (34) to calculate the arithmetic means (A (A1, A2, ... An)) of the detection signals (S) for each section period (T); a deriving unit (35) to derive a determination threshold value (D) on the basis of the ratio of the two arithmetic means indicated by the unit sections arranged in the direction of travel or the vertical direction; and a determining unit (36) to determine, on the basis of the arithmetic means (A) and the determination threshold value (D), whether a warning signal (W) is to be output.</p> |
