Signal Conditioning System of Large Dynamic Fast Pulse in Radiation Detection

Abstract

A signal conditioning system for large dynamic fast pulses in radiation detection includes a DC power supply processing circuit, a bisecting circuit, an attenuation circuit, an overvoltage limiting protection circuit and a driving circuit. The invention realizes the conditioning of the large dynamic fast pulse by bisecting the measured large dynamic fast pulse and complementing each other in the two measurement ranges, thereby expanding the dynamic range of the data acquisition system from millivolts to hundreds of volts ; Adopt the over-voltage limiter protection circuit based on the principle of forward protection of switching diodes, which not only ensures the equal-amplitude transmission of smaller signals, but also limits the large signals to achieve effective protection for the data acquisition system; The idea of ​​amplification, on the basis of maintaining the original characteristics of the signal, effectively suppresses the reflection caused by the change of the system impedance by the microvaristor when the switching diode is turned on.

Description

technical field [0001] The invention belongs to the technical field of nuclear electronics and relates to a signal conditioning system in pulse radiation detection, in particular to a signal conditioning system for large dynamic fast pulse radiation detection. Background technique [0002] In a strong radiation environment, the detection object is a fast pulse signal, and its frequency can reach up to 200MHz. The uncertainty of its amplitude is large, and the amplitude may be several millivolts or hundreds of volts. The signal is also called a large dynamic pulse signal. For the measurement of this kind of fast pulse signal, the data acquisition system is often used to quantify the detected signal and transmit it to the control terminal through optical fiber to record and save it. However, since the peak-to-peak input of the analog-to-digital converter ADC, the core device of the data acquisition system, is usually only a few volts (generally less than 2V), the dynamic rang...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of insufficient dynamic range of the data acquisition system in the detection of fast pulse signals in the background technology, the present invention provides a signal conditioning system for large dynamic fast pulses in radiation detection that can expand the dynamic range of the data acquisition system to measure

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