Patent ID: 9116245
Filing Date: 2015-08-25
Classification: G01T

Abstract:
1. A dose rate measurement system comprising: a radiation detector which absorbs incident radiation energy, sends a current pulse proportional to the energy, and sends a DC voltage proportional to the energy; means of generating a pulse height spectrum, which converts electric charge carried by the current pulse to an analog voltage pulse, extracts a pulse height value from the analog voltage pulse, and generates a pulse height spectrum from the pulse height value to be sent; means of calculating a low range dose rate, which converts the pulse height spectrum to a dose rate to be calculated as a low range dose rate in a fixed cycle; means of compensating energy characteristics, which measures fluctuation of the DC voltage, estimates average energy of the radiation, and derives an energy compensation coefficient; means of calculating a high range dose rate, which converts the DC voltage to a dose rate, and multiplies the converted dose rate by the energy compensation coefficient to be calculated as a high range dose rate in a fixed cycle; and means of switching dose rates, which switches to either the low range dose rate or the high range dose rate to be sent as a dose rate based on the ratio between the low range dose rate and the high range dose rate.