Patent ID: 9012834
Filing Date: 2015-04-21
Classification: G01T,H01J

Abstract:
1. An in-situ calibration system for radiation monitors, comprising: a monitor to be calibrated, wherein a portable surveymeter is placed inside, so as to monitor an ambient or area radiation dose; a portable irradiator, wherein the portable irradiator has a radiation source inside; a laser locator, coupled to a pig, so as to confirm a central location of the portable surveymeter of the monitor to be calibrated; an irradiator lifter, wherein an upper end of the irradiator lifter is fixed to the pig, the portable irradiator is placed in the pig, and the irradiator lifter is used for setting a distance and a height between the portable irradiator and the monitor to be calibrated, so that the radiation source provides the monitor to be calibrated with a radiation dose for detecting the radiation source corresponding to the distance and the height; and a laser range finder, used for measuring a distance between the radiation source of the portable irradiator and the monitor to be calibrated; wherein, said portable surveymeter is of a site background and is used for measuring a radiation quantity of the background during in-situ calibration.