Method for judging saturation of G-M countering tubes in G-M countering tube nuclear radiation detector
A nuclear radiation detector and counting tube technology, which is applied in the field of nuclear radiation monitoring, can solve problems such as nuclear radiation accidents, user misjudgments, reflexes, etc., and achieve the effect of avoiding nuclear radiation accidents
Active Publication Date: 2014-03-26
WUHAN HAIWANG TECH
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This may cause the measurement value of the instrument to be reflected at the high end of the range, causing users to make misjudgments and causing nuclear radiation accidents
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[0019] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0020] The invention provides a method for judging whether the G-M counter is saturated. This method is to add the integral function after the negative pulse output of the counter tube, the integral module output is a DC voltage, and the DC voltage is sent to the subsequent circuit for processing and display. The principle is as image 3 , 4 Shown.
[0021] Such as image 3 , 4 Shown are two embodiments of the invention. among them, image 3 It is a schematic diagram of the circuit for judging whether the G-M counter is saturated when the G-M counter is working in the cathode sampling mode; ...
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The invention relates to the field of nuclear radiation monitoring, and discloses a method for judging the saturation of G-M countering tubes in a G-M countering tube nuclear radiation detector. With the method, the integrating function is added after cathode pulses of the countering tubes are output, an integrating module outputs a direct-current voltage, the direct-current voltage is sent to a subsequent circuit to be processed and displayed, an output voltage VT on the measurement upper limit of the G-M countering tubes is recorded, the time-limit output voltage VT is used as a judgment basis for judging whether the G-M countering tubes are saturate or not, the measured output voltage VD output by the integrating module is compared with the voltage VT, whether the countering tubes are saturate or not is judged, and when the output voltage is larger than the voltage VT, the G-M countering tubes work in the saturation state; when the output voltage is smaller than the voltage VT, the G-M countering tubes work in the normal state. Error judgment on measurement values of radiation fields can be effectively avoided.
Description
Technical field [0001] The invention relates to the field of nuclear radiation monitoring, in particular to a method for judging the saturation of the G-M counter in a G-M counter nuclear radiation detector. Background technique [0002] GM counter tube has the advantages of large output signal amplitude, low power consumption, wide applicable ambient temperature range, small size, simple and reliable structure, low cost, long life and other advantages. It is used in nuclear fuel processing, reactors, accelerators, nuclear power plants, environmental radiation monitoring and other nuclear radiation The field of monitoring is widely used. [0003] Use G-M counter tube as nuclear radiation detector, its signal acquisition circuit is usually like figure 1 , 2 Shown. The working principle of this circuit is as follows: nuclear radiation rays enter the sensitive volume of the GM counter, ionize the gas in the sensitive volume, and the generated electrons are accelerated to drift toward...
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Inventor 朱国华郭晓彬孙光智冯红艺王维伟许浒吴志斌胡家法马畅张磊
Owner WUHAN HAIWANG TECH