Signal conditioning method and signal conditioning system of unipolar fast pulse in radiation detection

Abstract

Provided are a signal conditioning method and a signal conditioning system of a unipolar fast pulse in radiation detection. The signal conditioning method comprise the steps that firstly, half of a peak value Vp-p of a differential input peak of a data acquisition system serves as direct current reference voltage; secondly, direct-current bias voltage with different polarity is generated according to the polarity of a detected unipolar fast pulse; when the unipolar fast pulse is a positive signal, polarity conversion is performed on the direct-current reference voltage to obtain negative-phase direct-current bias voltage -1 / 2Vp-p; when the unipolar fast pulse is a negative signal, polarity conversion is not performed on the direct-current reference voltage to obtain positive-phase direct-current bias voltage 1 / 2Vp-p; thirdly, the direct-current bias voltage and the unipolar fast pulse are superposed according to the original range to obtain a pulse signal with a direct-current bias; a positive pulse and the negative-phase direct-current bias voltage are superposed to obtain a positive pulse signal with the direct-current bias; a negative pulse and the positive-phase direct-current bias voltage are superposed to obtain a negative pulse signal with the direct-current bias. According to the signal conditioning method and the signal conditioning system of the unipolar fast pulse in radiation detection, the dynamic measurement range of the data acquisition system can be expanded.

Description

technical field [0001] The invention belongs to the technical field of nuclear electronics, and relates to a signal conditioning method and a signal conditioning system for unipolar fast pulses, in particular to a method that can be applied to radiation detection and can expand the dynamic range of unipolar fast pulses measured by a data acquisition system Signal conditioning method and signal conditioning system. Background technique [0002] In a strong radiation environment, the detection object is a unipolar fast pulse signal. The data acquisition system is often used to quantify the detected signal and transmit it to the control terminal through an optical fiber for recording and storage. However, since the core device of the data acquisition system - the linear dynamic range of the analog-to-digital converter ADC is usually -1 / 2V p-p ~1 / 2V p-p (V p-p is the differential input peak-to-peak value of the analog-to-digital converter ADC), which is very useful for the me...

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Problems solved by technology

But this method still only utilizes half the dynamic range of the ADC when measuring fast unipolar pulses

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