Energy spectrum acquisition-based portable radiation dose measuring device

Abstract

The invention relates to the technical field of radiation dose measurement, in particular to an energy spectrum acquisition-based portable radiation dose measuring device, which comprises a CZT detector module, a signal shaping amplifying circuit, a high-speed AD conversion circuit and a digital signal processing module, wherein the CZT detector module is used for converting particle energy information of a to-be-measured radiation field to corresponding electrical signals; the signal shaping amplifying circuit is used for amplifying the amplitude of the electrical signals outputted by the CZTdetector; the high-speed AD conversion circuit is used for continuously sampling pulse signals outputted by the signal shaping amplifying circuit and converting the pulse signals to a digital quantity for being outputted; and the digital signal processing module is used for performing amplitude information extraction and energy spectrum accumulation on the digital signal waveform outputted by thehigh-speed AD conversion circuit, and after energy spectrum accumulation is completed, based on an energy spectrum dose conversion function, the incident particle type and the radiation dose information of the to-be-measured radiation field are calculated and obtained. In comparison with the prior art, the detailed information of the particle type, the energy and the radiation dose of the to-be-measured radiation field can be provided, the circuit structure is simple and reliable, and popularization is convenient.

Description

technical field [0001] The invention relates to the technical field of radiation dose measurement, in particular to a portable radiation dose measurement device based on energy spectrum acquisition. Background technique [0002] The application of nuclear technology requires extensive use of radioactive sources, and radioactive sources contain radiation. If operating procedures are violated or improper protective measures are taken, it will have extremely bad effects on personnel safety and the environment. Therefore, real-time monitoring of the surrounding environment of nuclear technology application sites, especially the radiation dose of nuclear technology application personnel, is a necessary condition for the safe development of nuclear technology. [0003] The main portable radiation dosimeters currently on the market are counting detectors. This type of measuring equipment can only record the number of particles entering the detector in the radiation field, and canno...

AI Technical Summary

Problems solved by technology

Therefore, the radiation dose measurement equipment based on the counting measurement method can only give the general information of the radiation field intensity in the radiation field with a limited energy range, and the deviation of the radiation dose rate calculated from this is also the same as the energy response of the dosimeter probe. trend

In addition, due to the different radiation weights of different types of particles, the radiation dose given by the counting dosimeter has a greater deviation in some cases

The energy compensation method can correct the energy response curve of the probe by adding shielding, etc., but the size and weight of the shielding material limit the use of this method on portable measuring devices

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