Temperature drift self-correction method of sea radioactivity measurement sensor, and sensor

Abstract

The invention discloses a temperature drift self-correction method of a sea radioactivity measurement sensor, and a sensor. A temperature-sensitive element is additionally arranged on the sensor, the temperature of the sensor is detected through the temperature-sensitive element, the amplification gain of the sensor is automatically adjusted according to temperature change of the sensor, and amplitude of pulse voltages generated by the sensor is adjusted to the amplitude of pulse voltages generated when the sensor measures the same radionuclide at a reference temperature, such that peak drift of gamma energy spectrum data generated by the sensor can be automatically corrected and a more accurate detection result can be obtained. By using the sensor provided by the invention, the activity of such radionuclide as seawater, seabed sediment, marine organisms and the like in a sea environment can be automatically and continuously monitored for long time and a stable reliable monitoring result can also be obtained; and the method and the sensor can also be suitable for various sea automatic monitoring platforms and can be promoted and applied to the radioactivity monitoring work process of other water body environments.

Description

Technical field [0001] The invention belongs to the technical field of marine radioactivity measurement, and specifically relates to a measuring device used for on-site detection of marine radioactivity. Background technique [0002] my country's marine radioactivity monitoring still remains in the traditional way of on-site sampling and bringing it back to the laboratory for testing. The procedures are cumbersome and time-consuming. More importantly, this intermittent detection mode cannot effectively monitor the radioactivity in the ocean, and it is even more difficult to provide timely warning of pollution. [0003] The gamma spectrometer based on NaI(Tl) scintillator design has the advantages of high detection efficiency, wide applicable temperature range, stable performance, low cost and low power consumption. It is used in environmental radioactivity measurement, industrial online nuclear measurement and control, mining and nuclear protection safety, etc. The field has a wid...

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Problems solved by technology

However, these reference sources themselves are also affected by temperature, causing the reference peak position of the reference source to drift, which in turn affects the spectrum stabilization results of the sensor

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