Detector device used for radiation monitoring

Abstract

The invention discloses a detector device for radiation monitoring, which comprises an ionization chamber part comprising a shell and an electrode part, a circuit part processing electric signals from the electrode part, and a metal seal box, wherein the circuit part is arranged in the metal seal box. Besides, a spherical gas filled ionization chamber, a signal amplification / data processing circuit, the metal seal box and other parts are all arranged in an insulating cover so as to further improve the adaptivity of the whole detector device to severe environment. Moreover, the outer layer of the insulating cover is plated with a conductive film, thereby achieving the electromagnetic shielding effect, improving the electromagnetic interference resistance of the signal amplification / data processing circuit, ensuring the stable performance and improving the measuring accuracy.

Description

technical field [0001] The invention relates to the technical field of environmental radiation monitoring, in particular to a detector device for radiation monitoring. technical background [0002] As a clean energy source, nuclear power also has its own disadvantages, that is, nuclear energy is radioactive. Therefore, it is very important to monitor the environmental radiation in a large area around the nuclear power plant, especially the development of gamma-ray detector equipment that directly reflects the local radioactivity level is extremely necessary. [0003] At present, there are few detectors for environmental gamma-ray monitoring at home and abroad. Environmental gamma spectrometers produced in my country (such as BH1324F of Beijing Nuclear Instrument Factory) have strong performance and low measurement error, but they can only analyze samples and are not specially designed for environmental background gamma-ray radiation monitoring. Moreover, the system is too ...

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Problems solved by technology

[0009] However, due to the separation of the existing ionization chamber and the corresponding amplification / data acquisition circuit, the overall sealing of the detector is poor, and it is often unable to withstand various harsh weather conditions, especially in a mixed environment with long-term humidity or unknown air composition The capacitance between the electrodes of the ionization chamber tends to fluctuate, and the leakage current from the high-voltage electrode to the signal electrode through the insulating layer will also change, which will inevitably affect the signal output of the ionization chamber, thereby affecting the measurement accuracy.

[0010] In addition, the complex external electromagnetic field will also interfere with the weak current signal drawn from the signal pole of the ionization chamber to the amplifier circuit, resulting in increased noise

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