Wireless area gamma dose rate monitor based on Time-To-Count method and LoRa technology

Abstract

The invention discloses a wireless area gamma dose rate monitor based on a TimeToCount method and a LoRa technology, which relates to the field of radiation protection counting, and comprises a microcontroller, a power supply module, a high-speed high-voltage pulse circuit, a G-M counting tube, a signal conditioning circuit, an alarm circuit and a LoRa wireless communication module; the microcontroller, the high-speed high-voltage pulse circuit and the signal conditioning circuit are electrically connected with the power supply module, the high-speed high-voltage pulse circuit is electricallyconnected with the G-M counting tube, and the G-M counting tube is electrically connected with the signal conditioning circuit. The measuring range of the G-M counting tube is expanded by using the TimeToCount method, the service life of the G-M counting tube is prolonged, meanwhile, a LoRa-based signal wireless transmission mode is provided, large-range networking monitoring is facilitated, and through combination of the Time-To-Count technology and the LoRa technology, the cost and power consumption of environment gamma dose rate monitoring are reduced, and the monitoring range of the environmental gamma dose rate is enlarged.

Description

technical field [0001] The invention relates to the field of radiation protection counting, in particular to a wireless area gamma dose rate monitor based on the Time-To-Count method and LoRa technology. Background technique [0002] At present, the ray detectors of gamma dose rate monitors are mainly divided into four types, one is scintillation detector, the other is semiconductor detector, the other is ionization chamber, and the Geiger-Muller (G-M) counting tube . Among them, the G-M counter tube is the earliest and most widely used detector. His outstanding features are simple manufacture, low price, easy operation, large output pulse amplitude, and simple requirements for electronic circuits, but there are also fatal shortcomings: long dead time, narrow linear range, and cannot be used in high counting rate occasions. At the same time, under the weak radiation field, the statistical fluctuation is large and the response is slow, so the lower limit and upper limit of ...

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Problems solved by technology

His outstanding features are simple manufacture, low price, easy operation, large output pulse amplitude, and simple requirements for electronic circuits, but there are also fatal shortcomings: long dead time, narrow linear range, and cannot be used in high counting rate occasions. At the same time, under the weak radiation field, the statistical fluctuation is large and the response is slow, so the lower limit and upper limit of detection are not high

Its outstanding features are simple manufacture, low price, easy operation, large output pulse amplitude, and simple requirements for electronic circuits, but there are also fatal shortcomings: long dead time, narrow linear range, and cannot be used in high counting rate occasions. At the same time, under the weak radiation field, the statistical fluctuation is large and the response is slow, so the lower limit and upper limit of detection are not high

[0006] However, although the domestic research on the multi-purpose environmental monitoring gamma spectrometer system based on LoRa technology has been reported in the literature, the research on the wireless area gamma dose rate monitor based on the Time-To-Count principle and LoRa technology has not appeared.

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