Digital nuclear detector state evaluation and guarantee maintenance method and system

Abstract

The invention discloses a digital nuclear detector state evaluation and guarantee maintenance method and system. The digital nuclear detector state evaluation and guarantee maintenance system gives a quantitative index for nuclear detector state evaluation and guarantee maintenance under the condition of not increasing an extra hardware circuit, and can realize on-line monitoring and make an effective expectation, thereby reducing service and maintenance cost of the nuclear detector, and improving reliability, stability and availability of the nuclear detector. The method is characterized by, to begin with, setting type attribute parameters of the detector; determining performance characteristic parameters to be evaluated of the detector; collecting data related to the performance characteristic parameters to be evaluated and generating list data; then, calculating the current performance characteristic parameters of the nuclear detector according to the list data; with the historical data being combined, analyzing and evaluating the current performance level and change trend of the nuclear detector to obtain the quantitative index of the current health state; and finally, making a guarantee maintenance auxiliary decision of the detector according to the quantitative index state.

Description

technical field [0001] The invention relates to the technical field of radiation detection and signal processing, in particular to a method and system for state evaluation and guarantee maintenance of a digital nuclear detector. Background technique [0002] Whether it is in the fields of radiation detection such as energy spectrometers and radiation counters, or in the fields of radiation analysis such as positron lifetime spectrometers and Mössbauer spectrometers, or in the fields of computed tomography (CT), single photon emission tomography ( Single PositronEmission Computed Tomography (SPECT for short) and Positron Emission Tomography (PET for short) and other nuclear medicine imaging fields, the detection principle is to convert high-energy photons into measurable pulse electrical signals through the detector detection unit, and then use Its electronic unit extracts the characteristic points contained in the pulse signal, and then obtains information that meets the nee...

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Problems solved by technology

Although this device can quickly locate the fault point, on the one hand, it needs to add additional hardware circuits, such as power conversion circuits, high-voltage pulse and low-voltage pulse signal generation circuits, current generation circuits, and analog sampling circuits; Online monitoring and evaluation of working status

[0006] In addition, Yan Yongjun and others also proposed a fault diagnosis method and device for nuclear detectors (Yan Yongjun, Zhou Jianliang, Wang Qingzhen, etc. Fault diagnosis method and device for nuclear detectors [P]. Chinese invention patent, patent publication number CN103983881.A), But on the one hand, this method still needs to add new hardware devices, such as additional circuits such as D / A converter, high and low voltage voltage detection module, reference voltage module, multi-way switch, A / D converter, which undoubtedly increases the cost of nuclear detectors. maintenance cost; on the other hand, although the method is connected with the radiation detector through the fault diagnosis device, the fault diagnosis device collects the nuclear radiation detector forming circuit, analog amplifier circuit and nuclear probe signal data online, and analyzes the statistical indicators of the detector signal , the difference between the time-frequency domain index and the fault database can detect certain detector fault anomalies, but due to the lack of in-depth analysis of the intrinsic characteristic information of the detector, it is impossible to make an effective expectation on the change trend of the nuclear detector state, and Fault diagnosis accuracy is not high

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