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Method for adjusting discrimination threshold value of pulse measurement circuit in program control manner

A technology for adjusting pulses and measuring circuits, which is applied to measuring devices, radiation measurement, and neutron radiation measurement, etc. It can solve the problems of difficult to meet the development trend of digital program control of signal processing of pulsed nuclear measurement detectors, and achieve good electrical isolation. The effect of anti-interference ability, wide adjustment range and high adjustment accuracy

Inactive Publication Date: 2021-07-23
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
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Problems solved by technology

At present, the commonly used method is manual adjustment through high-precision reference sources and potentiometers. This method meets the above requirements, but it is difficult to meet the digital program control development trend of pulse-type nuclear measurement detector signal processing.

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  • Method for adjusting discrimination threshold value of pulse measurement circuit in program control manner
  • Method for adjusting discrimination threshold value of pulse measurement circuit in program control manner

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Embodiment 2

[0046] Embodiment 2: On the basis of Embodiment 1, it is applied to the design of the source-range proportional counter tube signal conditioning and processing equipment developed by the third-generation nuclear power nuclear instrument system equipment. The source-range proportional counter tube needs to be subjected to amplitude discrimination after passing through the low-noise amplifier circuit . Compared with the traditional manual adjustment method, the invention can realize the program control of the discrimination threshold, has a wide adjustment range and high adjustment accuracy, and has good electrical isolation and anti-interference ability.

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Abstract

The invention discloses a method for adjusting a discrimination threshold of a pulse measurement circuit in a program control manner, relates to discrimination threshold signal processing of a comparator, and solves the problem that discrimination threshold adjustment of an amplitude discrimination circuit is required to be low in noise level and high in precision. A program control circuit receives externally input program control parameters through communication, the program control parameters are output to a linear optical isolation channel in the form of program control analog quantity, namely analog signals, and the program control parameters are output to a high-precision operational circuit from the linear optical isolation channel to be processed and amplified into 0V-10V signals. The processed and amplified signal is a discrimination threshold value input into the comparator; the screening threshold is used for extracting effective signals in the output signals of the detector. According to the invention, the program control of the discrimination threshold is realized, the adjustment range is wide, the adjustment precision is high, and the electrical isolation anti-interference capability is good.

Description

technical field [0001] The invention relates to a discrimination threshold signal processing technology of a comparator, in particular to a method for program-controlled adjustment of the discrimination threshold of a pulse measurement circuit. Background technique [0002] The pulse-type nuclear measurement detector is a key detector for the measurement of the neutron fluence rate and its change rate in the reactor. The number of pulses per unit time reflects the level of the neutron fluence rate, and the noise signal is generally eliminated by the amplitude discrimination circuit. In order to effectively extract the count rate information of the pulse-type nuclear measurement detector, the schematic diagram of the amplitude discrimination circuit figure 1 shown. [0003] Since the output signal amplitude of the pulse-type nuclear measurement detector is weak and the frequency band is wide, it is necessary to prevent the introduction of noise during the amplitude discrimin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T3/00
CPCG01T3/008
Inventor 喻恒罗庭芳高志宇何正熙万波青先国曾少立朱宏亮包超王银丽黄有骏蒋天植孙琦林超杨振雷袁航单伟臧峰刚刘艳阳何佳佶杨戴博李昆黎刚
Owner NUCLEAR POWER INSTITUTE OF CHINA
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