Signal Conditioning Method and Signal Conditioning System of Unipolar Fast Pulse in Radiation Detection

Abstract

A signal conditioning method and conditioning system for unipolar fast pulses in radiation detection, the signal conditioning method comprising: 1) using half of the differential input peak-to-peak value Vp-p of the data acquisition system as a DC reference voltage; 2) according to the measured unipolar The polarity of the unipolar fast pulse generates DC bias voltages with different polarities: when the unipolar fast pulse is a positive signal, the polarity of the DC reference voltage is reversed to obtain a negative phase DC bias voltage -1 / 2Vp-p ; When the unipolar fast pulse is a negative signal, do not convert the polarity of the DC reference voltage, and obtain the positive phase DC bias voltage 1 / 2Vp‑p; 3) combine the DC bias voltage and the unipolar fast pulse signal according to the original The amplitude is superimposed to obtain a pulse signal with a DC bias: the positive pulse and the negative phase DC bias voltage are superimposed to obtain a positive pulse signal with a DC bias; the negative pulse and the positive phase DC bias voltage are superimposed to obtain a DC bias negative pulse signal. The invention can expand the measurement dynamic range of the data acquisition system.

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...

AI Technical Summary

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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